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Monolithic hybrid abutment crowns: Influence of crown height, crown morphology and material on the implant-abutment complex J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-03-13 Tobias Graf, Elisabeth Völler, Kurt Erdelt, Michael Stimmelmayr, Oliver Schubert, Jan-Frederik Güth
Purpose: This in vitro study investigated the influence of material selection, crown morphology, and vertical crown height on the biomechanical behavior of monolithic hybrid abutment crowns (HACs). Methods: Ninety implants were embedded in accordance with ISO standard 14801; ninety HACs were mounted (N=90). Monolithic crowns with varying group-specific designs were luted using titanium bases. HACs
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Dental prosthesis use moderates association between tooth loss and risk of depressive symptoms in older adults with severe tooth loss: The JAGES cohort trial J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-03-13 Noriko Nakazawa, Kenji Takeuchi, Taro Kusama, Sakura Kiuchi, Katsunori Kondo, Ken Osaka
Purpose: Depression is a leading cause of disability. Although tooth loss increases the risk of depressive symptoms, it is unclear whether dental prosthesis use moderates this risk. This study aimed to investigate whether dental prosthesis use moderates the association between tooth loss and new depressive symptoms in older adults. Methods: This cohort study used data from the 2016 and 2019 Japan Gerontological
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Does maintaining the number of present and functional teeth benefit the longevity of life in older people requiring nursing care?: A prospective cohort study J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-03-13 Eri Koyama, Aya Kimura-Ono, Takuya Mino, Yoko Kurosaki, Kana Tokumoto, Michiyo Yamamoto, Shinsuke Nakagawa, Suguru Osaka, Kumiko Nawachi, Mami Inoue-Minakuchi, Mitsuaki Ono, Hajime Minakuchi, Kenji Maekawa, Takuo Kuboki
Purpose: This prospective cohort study examined the effects of the number of present and functional teeth on mortality among older Japanese adults requiring nursing care in an environment of comprehensive oral hygiene and nutritional management. Methods: The study included 174 older adults (mean age: 84.4 ± 8.3 years; male/female: 49/125) in need of support or long-term care, who resided in either
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A dual composite resin injection molding technique with 3D-printed flexible indices for biomimetic replacement of a missing mandibular lateral incisor J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-03-13 Keiichiro Watanabe, Eiji Tanaka, Kohei Kamoi, Antonin Tichy, Takahiko Shiba, Kazuhide Yonerakura, Masatoshi Nakajima, Ruonan Han, Keiichi Hosaka
Patients: This case report presents a minimally invasive approach to replace a missing mandibular lateral incisor using a dual-injection molding technique with flowable composite resins. Integrated with a comprehensive digital workflow, this method achieves a structurally and esthetically biomimetic, bi-layered prosthetic solution. A 34-year-old woman with congenital absence of a mandibular lateral
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Advanced statistical analyses to reduce inconsistencies in bond strength data focused on donor factors: A six-factor analysis using linear mixed and nonlinear regression models J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-03-01 Azusa Yamanaka, Atsushi Mine, Ayumi Shintani, Mariko Aoki-Matsumoto, Masahiro Yumitate, Shintaro Ban, Masaya Ishida, Munechika Takaishi, Hirofumi Yatani, Bart Van Meerbeek, Takuya Minamino, Shoichi Ishigaki
Purpose: This study aimed to investigate the effects of the age and sex of tooth donors on dentin bond strength. Methods: A total of 38 extracted teeth (12 male and 26 female donors; age range: 17–82 years) were used in this study. In addition to donor age and sex, four other microtensile bond strength (μTBS) test specimen factors were evaluated: dentin position, bonding area, presence of voids at
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In vitro assessment of polishing efficiency for additive-manufactured Co–Cr alloy clasps J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-02-28 Jyotetsu Takeyama, Toshitugu Sakurai, Hidemasa Shimpo, Noboru Kawamura, Chikahiro Ohkubo
Purpose: The processes and methods of treating and polishing additive-manufactured (AMed) cobalt-chromium (Co–Cr) alloy clasps were assessed in vitro to determine their suitability for constant clinical use and the reduction of dental technician work. Methods: AMed Aker clasps were fabricated by selective laser sintering of approximately 50 μm Co–Cr alloy powders. After the nodules and fins on the
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Anomaly detection of retention loss in fixed partial dentures using resonance frequency analysis and machine learning: An in vitro study J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-02-21 Sara Reda Sammour, Hideki Naito, Tomoyuki Kimoto, Keiichi Sasaki, Toru Ogawa
Purpose: This study aimed to determine the usefulness of machine learning techniques, specifically supervised and unsupervised learning, for assessing the cementation condition between a fixed partial denture (FPD) and its abutment using a resonance frequency analysis (RFA) system. Methods: An in vitro mandibular model was used with a single crown and three-unit bridge made of a high-gold alloy. Two
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Effect of soft denture liners on complete denture treatments: A systematic review J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-02-20 Yoko Hasegawa, Hajime Minakuchi, Masahiro Nishimura, Kensuke Nishio, Fumi Yoshioka, Tomohiro Ishii, Takafumi Watanabe, Yuichiro Nishiyama, Yusuke Sato, Kazuhiro Yoshida, Ma. Therese Sta. Maria, Toshimitsu Iinuma, Yoshizo Matsuka
Purpose: This systematic review examined the effectiveness of soft denture relining (SDR) materials. Study selection: A comprehensive search of MEDLINE, Cochrane Library, and ICHUSHI was conducted up to July 26, 2020. Target outcomes were patient satisfaction, oral health-related quality of life (OHRQOL), masticatory ability (MA), denture functional duration, residual ridge resorption (RRR), and microbial
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Innate immune regulation in dental implant osseointegration J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-02-12 Takeru Kondo, Masahiro Yamada, Hiroshi Egusa
Purpose: Dental implant osseointegration comprises two types of bone formation—contact and distance osteogenesis—which result in bone formation originating from the implant surface or bone edges, respectively. The physicochemical properties of the implant surface regulate initial contact osteogenesis by directly tuning the osteoprogenitor cells in the peri-implant environment. However, whether these
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Additive manufacturing of dental ceramics in prosthodontics: The status quo and the future J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-02-12 Han Zhu, Jimin Jiang, Yujie Wang, Sijie Wang, Yong He, Fuming He
Purpose: This review aims to summarize the available technologies, material categories, and prosthodontic applications of additive manufacturing (AM) dental ceramics, evaluate the achievable accuracy and mechanical properties in comparison with current mainstream computer-aided design/computer-aided manufacturing (CAD/CAM) subtractive manufacturing (SM) methods, and discuss future prospects and directions
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Efficacy of oropharyngeal exercises as an adjuvant therapy for obstructive sleep apnea: A randomized controlled trial J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-02-01 Phenbunya Siripajana, Premthip Chalidapongse, Natthawan Sanguanwong, Chayanit Chaweewannakorn
Purpose: Some patients with mild-to-moderate obstructive sleep apnea (OSA) undergoing mandibular advancement device (MAD) therapy may exhibit residual sleep-breathing abnormalities. These cases require adjunctive treatment to further reduce the remaining airway inadequacy, which may affect the health and quality of life. This clinical trial was conducted since the oropharyngeal exercise, which aims
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Effect of different surface treatments on shear bond strength of autopolymerizing repair resin to denture base materials processed with different technologies J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-02-01 Mona Gibreel, Leila Perea-Lowery, Sufyan Garoushi, Junichiro Wada, Lippo Lassila, Pekka Vallittu
Purpose: To evaluate the effect of chemical, mechanical, and combination surface treatments on the shear bond strength (SBS) of autopolymerizing repair resins to conventional heat-cured, computer aided design (CAD)-computer aided manufacturing (CAM) milled, and three-dimensionally (3D) printed denture base materials. Methods: Specimens were fabricated and divided according to the surface treatment
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Changes in occlusal relationships observed using an intraoral scanner in patients with an acquired open bite: A case report J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-29 Ryota Takaoka, Shion Morioka, You Ueda, Yohei Tsunetou, Hirotaka Baba, Shoichi Ishigaki
Patients: This case report describes a procedure for assessing changes in occlusal relationships in patients with acquired open bites due to temporomandibular joint disease using an intraoral scanner (IOS). A digital impression was made using the IOS at the initial visit. Subsequent impressions were made every 6 months using the IOS and magnetic resonance imaging (MRI) or computed tomography (CT).
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Effect of ethylene oxide unit number in bis-EMA on the physical properties of additive-manufactured occlusal splint material J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-29 Junichiro Wada, Paulina Heponiemi, Kanae Wada, Sufyan Garoushi, Noriyuki Wakabayashi, Tsutomu Iwamoto, Pekka K. Vallittu, Lippo Lassila
Purpose: To investigate the effects of the number of ethylene oxide units in bis-EMA on the physical properties of additively manufactured occlusal splints. Methods: Seven experimental materials containing bis-EMAs with three and 10 ethylene oxide units (BE3 and BE10, respectively) were prepared at different BE10 content rates (BE10-0%, -20%, -30%, -40%, -50%, -60%, and -80%). Half the specimens of
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Examination of the relationship between masseter muscle activity during sleep and wakefulness measured by using a wearable electromyographic device J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Saki Mikami, Taihiko Yamaguchi, Mebae Takahashi, Ai Kudo, Miku Saito, Toshinori Nakajima, Masana Maeda, Taishi Saito, Toshimitsu Sakuma, Sota Takahashi, Tomoya Ishimaru, Akihito Gotouda
Purpose This study aimed to measure masseter muscle activity throughout the day in outpatients suspected of having awake bruxism (AB) and/or sleep bruxism (SB) and examine the relationship between AB and SB by comparing muscle activity during daytime wakefulness and nighttime sleep. Methods Fifty outpatients with suspected SB and/or AB participated in this study. A single-channel wearable electromyogram
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Development of novel antimicrobial acrylic denture modified with copper nanoparticles J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Sebastián Correa, Loreto Matamala, Juan Pablo González, Mónica de la Fuente, Hetiel Miranda, Bruno Olivares, Miguel Maureira, Amaru Agüero, Leyla Gómez, Ximena Lee, Madeleine Urzúa, Cristian Covarrubias
Purpose: This study aimed to synthesize heat-cured poly(methyl methacrylate) (PMMA) acrylic formulated with copper nanoparticles (nCu) for producing dentures with antimicrobial properties and ability to prevent denture stomatitis (DS). Methods: nCu/PMMA nanocomposites were prepared through in situ formation of nCu into methyl methacrylate (MMA). The fabricated material was characterized using scanning
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Biomechanical behavior of all-ceramic endocrowns fabricated using CAD/CAM: A systematic review J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Abdulaziz A. AlHelal
Purpose: This study performed a systematic review to assess the biomechanical behavior of all-ceramic endowcrowns fabricated using computer-aided design and computer-aided manufacturing (CAD/CAM) for the restoration of endodontically treated teeth. Study selection: Three electronic databases (PubMed, Web of Science, and Scopus) were searched by operators specializing in health sciences databases searches
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Additional splint therapy has no superiority in myogenic temporomandibular disorders: A systematic review and meta-analysis of randomized controlled trials J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Kata Kelemen, János König, Márk Czumbel, Bence Szabó, Péter Hegyi, Gábor Gerber, Judit Borbély, Krisztina Mikulás, Péter Schmidt, Péter Hermann
Purpose Temporomandibular disorders (TMDs) are frequent stomatological disorders. However, their treatment is controversial. Therefore, we compared the efficacy of combination therapy (splint therapy along with physiotherapy, manual therapy, and counseling) with physiotherapy, manual therapy, and counseling alone. The extent of mouth opening and pain perception were the outcomes. Study selection Systematic
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Visualization of droplets and aerosols in simulated dental treatments to clarify the effectiveness of oral suction devices J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Jun Watanabe, Yoko Iwamatsu-Kobayashi, Kenji Kikuchi, Tomonari Kajita, Hiromitsu Morishima, Kensuke Yamauchi, Wataru Yashiro, Hidekazu Nishimura, Hiroyasu Kanetaka, Hiroshi Egusa
Purpose: The hazards of aerosols generated during dental treatments are poorly understood. This study aimed to establish visualization methods, discover conditions for droplets/aerosols generated in simulating dental treatments and identify the conditions for effective suction methods. Methods: The spreading area was evaluated via image analysis of the droplets/aerosols generated by a dental air turbine
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Outcomes of resin-bonded attachments for removable dental prostheses J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Anne Garling, Anna Krummel, Matthias Kern
Purpose: This clinical study aimed to evaluate the outcomes of resin-bonded attachments (RBAs) for precision-retained removable dental prostheses (RDPs) after at least two years of clinical maintenance. Methods: Since December 1998, 205 RBAs (44 bonded to posterior teeth, 161 to anterior teeth) have been inserted in 123 patients (62 females and 61 males; mean age, 63.6 ± 9.6 years) who were recalled
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Tooth morphology fusion technique is more accurate than conventional technique in transferring morphology of provisional to definitive screw-retained, implant-supported crown: A preliminary intervention study J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Takuya Mino, Yoko Kurosaki, Kana Tokumoto, Koji Izumi, Hiroshi Mitsumune, Kenji Maekawa, Akihiro Ueda, Tomohito Nakano, Junichi Sejima, Aya Kimura-Ono, Takuo Kuboki
Purpose: To compare the accuracy of the tooth morphology fusion (TMF) digital technique and customized impression transfer coping (conventional) technique when transferring the morphology of a provisional crown to a definitive screw-retained implant-supported crown. Methods: Six cases of partial edentulism (one anterior and five posterior) treated with oral implant placement in our clinic for the loss
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Accuracy of intraoral optical scan versus stereophotogrammetry for complete-arch digital implant impression: An in vitro study J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Alessandro Pozzi, Enrico Agliardi, Fabrizio Lio, Katalin Nagy, Alessandra Nardi, Lorenzo Arcuri
Purpose: To assess and compare the accuracies of intraoral scanners (IOS) and stereophotogrammetry (SPG) devices for complete-arch digital implant impressions. Methods: A 4-analog model was digitized using a desk scanner to obtain a reference file. Thirty test scans were conducted using the investigated IOS device, while an additional 30 scans were performed using the SPG device. Using the best-fit
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Current status of optical scanning in facial prosthetics: A systematic review and meta-analysis J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 János König, Kata Kelemen, László Márk Czumbel, Bence Szabó, Gábor Varga, Judit Borbély, Orsolya Németh, Péter Hegyi, Péter Hermann
Purpose To assess the accuracy of scanning technologies for constructing facial prostheses on human faces. Study selection Our systematic search was performed on five databases. Studies reporting on human volunteers (P) whose faces were scanned with a scanning technology were eligible. The anthropometrical interlandmark distances (ILDs) were used as indicators of accuracy; the ILDs are measured on
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Implant-assisted removable partial dentures: Part I. a scoping review of clinical applications J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Shinichiro Kuroshima, Yoshikazu Ohta, Yusuke Uto, Farah A. Al-Omari, Muneteru Sasaki, Takashi Sawase
Purpose: This scoping review aimed to systematically map research regarding implant-assisted removable partial dentures (IARPDs), and identify existing gaps in knowledge. Study selection: Two reviewers independently conducted a search of the MEDLINE-PubMed and Scopus databases according to the Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) extension for Scoping Review and
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Implant-assisted removable partial dentures: Part II. a systematic review of the effects of implant position on the biomechanical behavior J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Shinichiro Kuroshima, Muneteru Sasaki, Farah A. Al-Omari, Yusuke Uto, Yoshikazu Ohta, Yusuke Uchida, Takashi Sawase
Purpose: This systematic review aimed to evaluate the effects of implant placement sites on the biomechanical behavior of implant-assisted removable partial dentures (IARPDs) using finite element analysis (FEA). Study selection: Two reviewers independently conducted manual searches of the PubMed, Scopus, and ProQuest databases for articles investigating implant location in IARPDs using FEA, according
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Clinical performance of implant-supported single hybrid abutment crown restoration: A systematic review and meta-analysis J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Mengze Zhang, Dominic King Lun Ho, George Pelekos, Melissa Rachel Fok
Purpose: To investigate survival rates and technical and biological complications of one-piece screw-retained hybrid abutments in implant-supported single crowns (SCs). Study selection: An electronic search was performed on five databases for clinical studies involving implant-supported single hybrid abutment crowns constructed using titanium-base (Ti base) abutments, with at least 12 months of follow-up
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Digital workflow for monolithic and veneered zirconia and metal-ceramic posterior fixed partial dentures: A five-year prospective randomized clinical trial J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Paula Pontevedra, Carlos Lopez-Suarez, Veronica Rodriguez, Celia Tobar, Jesus Pelaez, Maria J Suarez
Purpose To evaluate and compare the survival, success rates, and biological and technical complications of three-unit posterior monolithic and veneered zirconia and metal-ceramic (MC) posterior fixed partial dentures (FPDs) fabricated using a digital workflow and computer-aided design and computer-aided manufacturing (CAD/CAM) over a 5-year follow-up. Methods Ninety patients in need of three-unit posterior
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Effect of bioactive glass particles on mechanical and adhesion properties of resin cements J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Ece Ucar Başol, Pekka Kalevi Vallittu, Lippo Veli Juhana Lassila, Isil Cekic Nagas
Purpose: The aim of this study is to evaluate the mechanical and adhesive properties of three different resin cements with bioactive glass (BAG) incorporated in two different ratios. Methods: BAG was added to different resin cements (3M Rely-X Ultimate, GC Link Ace, and GC Link Force) in different ratios (5% and 10% by weight). The three-point flexural strength, microhardness, and bond strength properties
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Effect of support structures on the trueness and precision of 3D printing dentures: An in vitro study J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Sahaprom Namano, Manabu Kanazawa, Awutsadaporn Katheng, Bui Ngoc Huyen Trang, Tamaki Hada, Yuriko Komagamine, Maiko Iwaki, Shunsuke Minakuchi
Purpose Additive manufacturing has revolutionized the fabrication of complete dentures. However, this process involves support structure, which is a construction part that holds the specimen during printing, and may prove to be disadvantageous. Therefore, this in vitro study compared the effect of support structure reduction on various volume and area distributions of a 3D-printed denture base to determine
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Masseter and digastric muscle activity evaluation using a novel electromyogram that utilizes elastic sheet electrodes J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Akio Fusayama, Tomoaki Mameno, Masahiro Wada, Kazuhiro Murakami, Toshikazu Nezu, Shinya Tokuono, Shusuke Yoshimoto, Takafumi Uemura, Tsuyoshi Sekitani, Kazunori Ikebe
Purpose: To evaluate the reproducibility and reliability of a novel electromyogram (EMG) device with a flexible sheet sensor for measuring muscle activity related to mastication and swallowing. Methods: We developed a new EMG device made of elastic sheet electrodes to measure the masseter and digastric muscle activities for evaluating mastication and swallowing. To examine the measurement reproducibility
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Effect of denture adhesives on masticatory performance: Multicenter randomized controlled trial J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Suguru Kimoto, Yasuhiko Kawai, Asako Suzuki, Yasuyo Koide, Hisatomo Kondo, Taro Nomura, Akito Tsuboi, Yoshihiko Ito, Guang Hong, Shunsuke Minakuchi, Gaku Ohwada, Yusuke Sato, Tetsuya Suzuki, Katsuhiko Kimoto, Makiko Saita, Noriyuki Hoshi, Yoshikazu Yoneyama, Yohei Sato, Masakazu Morokuma, Joji Okazaki, Takeshi Maeda, Kenichiro Nakai, Tetsuo Ichikawa, Kan Nagao, Keiko Fujimoto, Tadafumi Kurogi, Hiroshi
Purpose: The purpose of this study is to investigate the effects of denture adhesives on masticatory performance via a 10-center, parallel, randomized, controlled trial of complete denture wearers in Japan. Methods: The trial was conducted between September 2013 and October 2016. The inclusion criteria were complete edentulism, willingness to undergo new complete denture treatment, and willingness
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Bibliometric analysis of zirconia publications between 1980 and 2021: Global productivity and publication trends J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 H. Lamia Elif Mutlu-Sağesen, E. Ayça Sağesen, Mutlu Özcan
Purpose With an increase in patients' aesthetic demands and advancements in dental technologies, tooth-colored materials have grown in popularity. This study aimed to statistically analyze the scientific output of zirconia. Methods Articles published between 1980 and 2021 were downloaded from the Web of Science database and analyzed using various statistical/bibliometric methods. Correlations were
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Assessment of awake bruxism—Combinational analysis of ecological momentary assessment and electromyography— J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Kazuya Asami, Masanori Fujisawa, Konatsu Saito-Murakami, Shoko Miura, Takafumi Fujita, Yoshiki Imamura, Shiho Koyama
Purpose: No consensus exists regarding the examination methods and assessment criteria for awake bruxism (AB). In this study, masticatory muscle activity measured using electromyography (EMG) was recorded simultaneously with the ecological momentary assessment (EMA) of bruxism events. Data were collected to identify distinctive EMG parameters in AB. Methods: A total of 104 individuals were classified
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Fabrication of sports mouthguards using a semi-digital workflow with 4D-printing technology J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Tamaki Hada, Yuriko Komagamine, Manabu Kanazawa, Shunsuke Minakuchi
Purpose This technical procedure report explains the fabrication protocol for a newly developed 4D-printed sports mouthguard (MG) based on 4D-printing technology. Methods An intraoral scanner was used to scan a maxillary arch model. A two-layer sports MG was designed based on the scanned model using computer-aided design software and output in a standard tessellation language file format. Two types
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Visual treatment objective-based lateral esthetics preview for implant-supported reconstruction in terminal dentition with proclined maxillary incisors J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-16 Tao Zhang, Xiaoxiao Cai
Patient: A 67-year-old woman presented with severe periodontitis-induced terminal dentition and proclined maxillary incisor. Three-dimensional facial esthetics-driven computer-assisted virtual tooth rearrangement was performed for implant-supported full-arch reconstruction. The digital workflow combines facial and spiral computed tomography (CT) scans to generate a virtual patient for three-dimensional
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New trends in implant dentistry: Toward a super-aging society J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-15 Chihiro Masaki
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Actual state of the diurnal masseteric electromyogram: Differences between awareness and non-awareness of awake bruxism J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-12 Tomoya Ishimaru, Taihiko Yamaguchi, Taishi Saito, Yoshinori Hattori, Takahiro Ono, Yoshiaki Arai, Yoko Hasegawa, Hiroshi Shiga, Katsushi Tamaki, Junko Tanaka, Kazuhiro Tsuga, Hitoshi Abekura, Shouichi Miyawaki, Aya Maeda-lino, Saki Mikami, Akihito Gotouda, Kaoru Satoh, Koichi Shimizu, Yuji Kato, Takeshi Namita
Purpose: This study aimed to elucidate the relationship between diurnal masseter muscle activity and awareness of diurnal awake bruxism (d-AB) by conducting a comparative analysis of electromyographic (EMG) data from individuals with and without awareness of diurnal awake bruxism (d-AB), utilizing EMG data gathered from multiple subjects. Methods: Unilateral masseter electromyography (EMG) recordings
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In vitro study of optimal removable partial denture clasp design made from novel high-performance polyetherketoneketone J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-12 Pei-Wen Peng, May-Show Chen, Tzu-Yu Peng, Peng-Chien Huang, Hiroki Nikawa, Wei-Fang Lee
Purpose: This study aimed to investigate the retentive force and deformation of double Akers’ polyetherketoneketone (PEKK) clasps on removable partial dentures (RPDs) with varying designs and undercut depths. Methods: Thirty double Akers’ PEKK clasps with two different widths and heights (Groups I and II) were fabricated using computer-aided design and computer-aided manufacturing (CAD/CAM). Each design
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Clinical performance of laminate veneers: A review of the literature J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-12 Futoshi Komine, Mika Furuchi, Junichi Honda, Kei Kubochi, Hiroki Takata
Purpose: This narrative review aimed to survey the clinical outcomes of laminate veneers (LVs), including their survival and success rates. Study selection: An electronic search of MEDLINE/PubMed, Web of Science, Cochrane Library, and Google Scholar from 2000 to April 2023 was conducted using the keywords “laminate” OR “veneer” OR “porcelain” OR “feldspathic” OR “lithium disilicate” OR “composite resin”
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In silico nonlinear dynamic finite-element analysis for biaxial flexural strength testing of CAD/CAM materials J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-03 Hefei Li, Satoshi Yamaguchi, Chunwoo Lee, Ernesto B. Benalcázar-Jalkh, Estevam A. Bonfante, Satoshi Imazato
Purpose: The aim of this study was to establish and assess the validity of in silico models of biaxial flexural strength (BFS) tests to reflect in vitro physical properties obtained from two commercially available computer-aided design/computer-aided manufacturing (CAD/CAM) ceramic blocks and one CAD/CAM resin composite block. Methods: In vitro three-point bending and BFS tests were conducted for three
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Digital workflow in the design of individualized emergence profiles of implant restorations based on the contralateral tooth J. Prosthodont. Res. (IF 3.6) Pub Date : 2024-01-03 Huimin Zeng, Mi Zhou, Yichen Ge, Yangxue Yao, Xiaoxiao Cai
Purpose: To describe a novel digital design technique for creating an individualized emergence profile for implant restoration based on the contralateral tooth. Methods: Cone beam computed tomography (CBCT) data were used to accurately obtain a three-dimensional (3D) model of the contralateral tooth, which was mirror-flipped to design the emergence profile. The emergence profile was further divided
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Freehand vs. depth-gauge rotary instruments for veneer preparation: A controlled randomized simulator study J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-17 M. Oliver Ahlers, Georg Cachovan, Holger A. Jakstat, Daniel Edelhoff, Jakob C. Roehl, Ursula Platzer
Purpose: To investigate whether depth-gauge burs in veneer preparations influence preparation depth in a randomized, controlled, single-blinded trial and whether inexperienced operators can perform adequate veneer preparations. Methods: Participants were 20 undergraduate dental students with no prior veneer preparation experience. The instruments used were the “Laminate Veneer System” (LVS), “Keramik-Veneers
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Machine learning model to predict the width of maxillary central incisor from anthropological measurements J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-17 Remya Ampadi Ramachandran, Merve Koseoglu, Hatice Özdemir, Funda Bayindir, Cortino Sukotjo
Purpose: To improve smile esthetics, clinicians should comprehensively analyze the face and ensure that the sizes selected for the maxillary anterior teeth are compatible with the available anthropological measurements. The inter commissural (ICW), interalar (IAW), intermedial-canthus (MCW), interlateral-canthus (LCW), and interpupillary (IPW) widths are used to determine the width of maxillary central
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A new proposal for the workflow using CAD/CAM technology for fabrication of resin-based removable partial dentures. J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-17 Akinori Tasaka,Ryota Mori,Takeshi Hirabayashi,Sato Kogawa,Kosei Ito,Juro Wadachi,Shuichiro Yamashita
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Prosthetic restorative modality in complete edentulism and its association with masticatory and speech discomforts: A nationwide cross-sectional study from Korea J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Su Young Lee, René Daher, Jin-Hyung Jung, Ho-Beom Kwon, Jung-Suk Han, Jae-Hyun Lee
Purpose Completely edentulous arches can be restored using various prosthetic modalities, and the treatment outcome may include masticatory and speech discomforts. This study aimed to investigate the current status of prosthetic restoration modalities used for completely edentulous patients and investigate the association between prosthetic restoration modalities and subjective discomfort in mastication
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Mechanism and clinical use of botulinum neurotoxin in head and facial region J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Swarnalakshmi Raman, Yumiko Yamamoto, Yoshitaka Suzuki, Yoshizo Matsuka
Purpose: Botulinum neurotoxin (BoNT) is a biological toxin produced by Clostridium botulinum. BoNT is a potent toxin extensively used in therapeutic interventions. This review provides an updated overview of the mechanisms of action and clinical applications of BoNT in head and facial region. Study selection: MEDLINE/PubMed searches were conducted using the terms “botulinum neurotoxin” and “dentistry”
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Effect of mandibular bilateral distal extension denture design on masticatory performance J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Tasuku Yoshimoto, Yoko Hasegawa, Ma Therese Sta Maria, Pinta Marito, Simonne Salazar, Kazuhiro Hori, Takahiro Ono
Purpose: Removable partial dentures have a wide range of applications as missing tooth prostheses, and the denture design can be quite diverse. However, the factors affecting masticatory function remain unclear. We investigated the effect of denture design, especially the use of indirect retainers and major connectors, on masticatory function in patients with mandibular bilateral distal extension dentures
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Cantilever resin-bonded fixed dental prosthesis to substitute a single premolar: Impact of retainer design and ceramic material after dynamic loading J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Ammar T. Kasem, Manal Abo-Madina, João Paulo M. Tribst, Walid Al-Zordk
Purpose: To evaluate the influence of retainer design and ceramic materials on the durability of minimally invasive cantilever resin-bonded fixed dental prostheses (RBFDPs) after artificial aging. Methods: One hundred caries-free human mandibular molars were prepared as abutments for all-ceramic cantilevered fixed dental prostheses using the following retainer designs: One wing (OW), Two wings (TW)
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Effects of abutment materials on peri-implant soft tissue health and stability: A network meta-analysis J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Paolo Pesce, Massimo Del Fabbro, Maria Menini, Emanuele De Giovanni, Marco Annunziata, Shahnawaz Khijmatgar, Luigi Canullo
Purpose: This systematic review aimed to evaluate the effect of the abutment material on peri-implant soft tissue health and stability. Study Selection: An electronic and hand search was conducted until February 2022. Only prospective randomized trials (RCTs) and controlled clinical trials (CCTs) comparing titanium abutments with abutments made of different materials, with a follow-up of at least 6
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Outcomes of abutment teeth with double crowns over an observation period of 27 years J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Vadim Kopzon, Michael Raedel
Purpose: The aim of this retrospective study was to determine the outcome of double crowns (DCs) using pooled data over a period of 27 years. Methods: Billing data were obtained from the digital accounting system of a university dental clinic. All DCs inserted and invoiced from January 1, 1992, to December 31, 2019, were collected. The maximum observation period of a DC was determined by a recorded
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Effect of abutment tooth location on the accuracy of digital impressions obtained using an intraoral scanner for removable partial dentures J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Kazuki Sakamoto, Junichiro Wada, Yuki Arai, Hironari Hayama, Yurika Ishioka, Eung-Yeol Kim, Ryunosuke Kazama, Yusuke Toyoshima, Noriyuki Wakabayashi
Purpose: To verify the effect of abutment tooth location on the accuracy of digital impressions obtained using an intraoral scanner (IOS) for removable partial dentures (RPDs). Methods: The target abutment teeth included the left first premolar (#34), second molar (#37), and right second premolar (#45) in a mandibular Kennedy class II model and the left and right second molars (#37, #47) in a class
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Effects of denture adhesives on denture retention and occlusal forces in complete denture wearers: A multicenter, randomized controlled trial J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Tadafumi Kurogi, Hiroshi Murata, Erika Yamaguchi, Yasuhiko Kawai, Asako Suzuki, Yasuyo Koide, Suguru Kimoto, Hisatomo Kondo, Taro Nomura, Akito Tsuboi, Guang Hong, Yoshihiko Ito, Shunsuke Minakuchi, Gaku Ohwada, Yusuke Sato, Tetsuya Suzuki, Katsuhiko Kimoto, Noriyuki Hoshi, Makiko Saita, Yoshikazu Yoneyama, Yohei Sato, Masakazu Morokuma, Joji Okazaki, Takeshi Maeda, Kenichiro Nakai, Tetsuo Ichikawa
Purpose: This study aimed to determine the effects of denture adhesives on denture retention and occlusal force in complete denture wearers in a multicenter, randomized, parallel-group controlled trial. Methods: Two hundred edentulous patients wearing complete dentures were allocated to three groups: powder-type denture adhesive, cream-type denture adhesive, and control (saline solution). Denture adhesives
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Accuracy of the preparation depth in mixed targeted restorative space type veneers assisted by different guides: An in vitro study J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Jing Gao, Tian Luo, Yuwei Zhao, Chenyang Xie, Haiyang Yu
Purpose: Most veneers are mixed targeted restorative space (MTRS)-type restorations that are partially within the original tooth and require inconsistent preparation depths. This study aimed to evaluate the accuracy of the preparation depth for MTRS veneer preparation. Methods: MTRS veneer preparation models were developed using the twisted maxillary central incisor (MCI) as the original tooth and
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Effects of layer thickness and build angle on the microbial adhesion of denture base polymers manufactured by digital light processing J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Ping Li, Pablo Kraemer Fernandez, Sebastian Spintzyk, Franziska Schmidt, Jamila Yassine, Florian Beuer, Alexey Unkovskiy
Purpose: To investigate the effects of printing-layer thickness and build angle on the surface characteristics and microbial adhesion of denture base polymers manufactured by digital light processing (DLP). Methods: Specimens were additively manufactured using DLP. The specimens were printed with different printing-layer thicknesses (25, 50, and 100 μm) and build angles (0°, 45°, and 90°). Scanning
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Optimization of blood and protein flow around superhydrophilic implant surfaces by promoting contact hemodynamics J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Hiroaki Kitajima, Makoto Hirota, Kohei Osawa, Toshinori Iwai, Juri Saruta, Kenji Mitsudo, Takahiro Ogawa
Purpose: We examined blood and protein dynamics potentially influenced by implant threads and hydrophilic/hydrophobic states of implant surfaces. Methods: A computational fluid dynamics model was created for a screw-shaped implant with a water contact angle of 70° (hydrophobic surface) and 0° (superhydrophilic surface). Movements and density of blood and fibrinogen as a representative wound healing
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Factors related to masticatory performance in patients with removable dentures for jaw defects following oral tumor surgery J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Manami Tsuji, Takayuki Kosaka, Momoyo Kida, Shuri Fushida, Naohiko Kasakawa, Akio Fusayama, Suzuna Akema, Daisuke Hasegawa, Eri Hishida, Kazunori Ikebe
Purpose In the treatment of oral tumors, extensive jaw defects due to surgical resection can reduce masticatory performance. Herein, we aimed to clarify the factors related to masticatory performance in patients with jaw defects. Methods In total, 76 patients (42 male and 34 female) underwent prosthetic treatment with a removable denture for a jaw defect following oral tumor surgery. Data on history
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Maternal chewing alleviates prenatal stress-related neuroinflammation mediated by microglia in the hippocampus of the mouse offspring J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Chie Hisada, Kyoko Kajimoto, Hiroko Tsugane, Iinuma Mitsuo, Kagaku Azuma, Kin-ya Kubo
Purpose: Prenatal stress affects the hippocampal structure and function in pups. Maternal chewing ameliorates hippocampus-dependent cognitive impairments induced by prenatal stress. In this study, we investigated hippocampal microglia-mediated neuroinflammation in pups of dams exposed to prenatal stress with or without chewing during gestation. Methods: Pregnant mice were randomly assigned to control
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Fracture resistance of CAD/CAM blocks cemented on dentin using different cementation strategies J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Munlika Anuntasainont, Nanthiphorn Po-ngam, Anne-Katrin Lührs, Siew Peng Neoh, Pong Pongprueksa
Purpose: To determine whether the fracture resistance of computer-aided design/computer-aided manufacturing (CAD/CAM) resin-based composites and polymer-infiltrated ceramic network materials cemented on dentin is influenced by the restoration thickness and composite cement application strategy. Methods: Disc-shaped specimens (Ø = 7 mm) of 0.8 mm and 1.5 mm thicknesses were milled from two CAD/CAM materials:
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Bond strength of CAD/CAM denture teeth to a denture base resin in a milled monolithic unit J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Amr Mohamed, Atsushi Takaichi, Yuka Kajima, Hidekazu Takahashi, Noriyuki Wakabayashi
Purpose Herein, the bond strength (BS) of denture teeth to a denture base resin in a milled monolithic unit was investigated and compared with those of 3D printed teeth to a 3D printed denture base and prefabricated teeth to a heat-cured acrylic resin before and after thermocycling. Methods Sixty specimens of a denture tooth attached to a cylindrical denture base were fabricated following ISO Standard
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Accuracy of optical interocclusal registration using an intraoral scanner J. Prosthodont. Res. (IF 3.6) Pub Date : 2023-10-13 Mami Okamoto, Norimasa Tanabe, Shota Fukazawa, Yutaro Oyamada, Hisatomo Kondo
Purpose: This study aimed to clarify the effect of occlusal force on appropriate optical interocclusal registration in clinical practice, considering periodontal ligament and jawbone deformation. Methods: Forty participants with natural, healthy dentition were enrolled (19 men and 21 women; mean age, 27.7 ± 2.0 years). A TRIOS3 intraoral scanner was used to scan the right lateral first premolar to