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Aspiration of periodontopathic bacteria due to poor oral hygiene potentially contributes to the aggravation of COVID-19 J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Yuwa Takahashi; Norihisa Watanabe; Noriaki Kamio; Ryutaro Kobayashi; Toshimitsu Iinuma; Kenichi Imai
Coronavirus infectious disease 2019 (COVID-19) caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was declared a pandemic in March 2020 by the World Health Organization. Periodontitis, one of the most prevalent diseases worldwide, leads to alveolar bone destruction and subsequent tooth loss, and develops due to pro-inflammatory cytokine production induced by periodontopathic
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Effects of cognitive behavioral therapy on orofacial pain conditions J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Noboru Noma; Yuki Watanabe; Akiko Shimada; Sho Usuda; Takashi Iida; Atsushi Shimada; Yuto Tanaka; Yuka Oono; Keiichi Sasaki
Numerous studies have confirmed the effectiveness of cognitive behavioral therapy (CBT) for chronic pain, and it is generally regarded as an appropriate intervention. However, it may not be effective for some pain sites, and the duration of the effect may be limited. In addition, some studies of CBT lacked a comparison group. This review summarizes evidence for the effectiveness of CBT for orofacial
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Phase transformation behaviors and mechanical properties of NiTi endodontic files after gold heat treatment and blue heat treatment J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Xiao-Mei Hou; Yin-Jie Yang; Jun Qian
WaveOne Gold, ProTaper Gold, Reciproc Blue, ProTaper Next, WaveOne and ProTaper files were selected to compare the phase transformation behaviors and mechanical properties of nickel-titanium (NiTi) rotary files after gold heat and blue heat treatments. The reverse transformation finishing point temperatures of WaveOne Gold, ProTaper Gold, ProTaper Next and WaveOne were higher than those of the other
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Effect of novel cycloaliphatic comonomer on the flexural and impact strength of heat-cure denture base resin J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Ajay Ranganathan; Suma Karthigeyan; Rahila Chellapillai; Venkateshwaran Rajendran; Tamizhesai Balavadivel; Anand Velayudhan
This study aims to evaluate the impact of adding a novel tricyclodecane dimethanol diacrylate comonomer on the flexural strength (FS) and impact strength (IS) of heat-cure denture base resin at 10% and 20% (v/v) concentrations. To test the FS and IS, a sum total of 150 bar-shaped specimens were prepared according to standard specifications. For the FS, the specimens were subjected to the three-point
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Impact of dietary acids on the surface roughness and morphology of composite resins J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Veridiana Camilotti; Márcio J. Mendonça; Max Dobrovolski; Anna C. Detogni; Gláucia M. B. Ambrosano; Mario F. De Goes
This in vitro study was performed to evaluate the surface roughness (Ra) and morphology by scanning electron microscopy (SEM) of composite resins that had been stored in acidic solutions typical of those present in the diet. Three composite resins (4 Seasons, Z250, and P90) were selected and divided into three groups (n = 7) according to the solutions tested: G1: distilled water; G2, Coca-cola, and
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Variability of salivary metabolite levels in patients with Sjögren’s syndrome J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Maria Herrala; Jopi J. W. Mikkonen; Paula Pesonen; Reijo Lappalainen; Leo Tjäderhane; Raija K. Niemelä; Hubertus Seitsalo; Tuula Salo; Sami Myllymaa; Arja M. Kullaa
Purpose: To investigate inter- and intra-individual variation in the levels and outputs (concentration multiplied by salivary flow rate) of salivary metabolites in patients with primary Sjögren’s syndrome (pSS). Methods: A total of 56 samples of stimulated saliva were collected from 14 female pSS patients during four laboratory visits within 20 weeks and analyzed using proton nuclear magnetic resonance
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Pulp survival after composite resin restoration of caries lesions in adults J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Takaaki Sato; Yusuke Matsuyama; Takeo Fujiwara; Junji Tagami
Minimal intervention is generally achieved by using direct composite resin (CR) restorations. However, deep caries lesions may lead to pulpal complications. This study evaluated the risk of endodontic complications after CR restoration in relation to depth of caries lesions. Data on 507 teeth from 316 adults treated with CR were analyzed. Caries depth was expressed as a percentage of the distance between
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Effect of food-simulating solvents on flexural properties of bulk-fill resin composites J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Hanadi Y. Marghalani
Purpose: This study evaluated the flexural strength of bulk-fills after immersion in food-simulating solvents. Methods: Four overlapping segments along both sides of bar-shaped specimens (25 × 2 × 2 mm) made from bulk-fill composite were irradiated with an Elipar LED light-curing (1,200 mW/cm2 for 20 s) device. The specimens were then divided into four groups (n = 20), according to storage media—namely
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Incobotulinum toxin type A for treatment of chronic myofascial pain J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Jorge Chaurand; Marycarmen Godínez-Victoria; Aldo Tellez-Girón; Jose-Alfredo Facio-Umaña; Fiacro Jimenez-Ponce
Purpose: This study assessed the effectiveness of incobotulinum toxin type A (IBTx) for chronic myofascial pain affecting the masseter and temporal muscles. Methods: Twenty two patients who received a diagnosis of chronic masseter and temporalis myofascial pain were evaluated by using a visual analog pain scale (VAS), digital pressure algometry, and the SF-36 Health Survey at baseline (T0), before
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The effect of occlusal splints on the mechanical stress on teeth as measured by intraoral sensors J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Yuto Tanaka; Toru Yoshida; Yoshiaki Ono; Yoshinobu Maeda
Purpose: Whether it is possible to prevent mechanical stress on teeth via an occlusal splint remains to be clarified. This study aimed to assess the same by simultaneously recording the occlusal pressure and strain on the teeth in humans. Methods: Eleven participants (five women and six men; mean age 25.7 years) were enrolled in this study. Hard and soft oral appliances were fabricated for the maxillary
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The effects of extended polymerization time for different resin composites on reactive oxygen species production and cell viability J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Cigdem Atalayin Ozkaya; Huseyin Tezel; Guliz Armagan; Fulya Tuzcu; Ufuk Sahbaz; Taner Dagci
Purpose: The present study was conducted to determine oxidative stress and cell viability after contact with resin composites polymerized for different times. Methods: Disk-shaped specimens of Admira Fusion, Ceram X One Universal, Solare x and Filtek Z550 (n = 12) were prepared, and two subgroups with polymerization times of 20 and 40 s were employed. The specimens were incubated with mouse fibroblast
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Reduction in nickel content of the surface oxide layer on Ni-Ti alloy by electrolytic treatment J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Takayuki Yoneyama; Takao Hanawa
Purpose: Ni-Ti alloy has been increasingly applied to dental and medical devices, however, it contains nickel, which is known to have adverse effects on the human body. The purpose of this study was to form a nickel-free surface oxide layer on Ni-Ti alloy by electrolytic treatment for better biocompatibility. Methods: Ni-49.15Ti (mol%) alloy was used, and the electrolytic treatment was performed in
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A newly developed age estimation method based on CpG methylation of teeth-derived DNA using real-time methylation-specific PCR J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Masahiro Kondo; Hirofumi Aboshi; Masaaki Yoshikawa; Ayano Ogata; Ryosuke Murayama; Masami Takei; Shin Aizawa
Age estimation of unidentified bodies is important in forensic medicine and crime scenes. There is accumulating evidence that DNA methylation in the human genome isolated from body fluids changes with age. Most of the data have been obtained by pyrosequencing. In the forensic field, a simple, quick, and economical method is required to evaluate the age of various types of samples. In this study, an
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Digital assessment of gingiva morphological changes and related factors after initial periodontal therapy J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Jingran Zhang; Zhen Huang; Yu Cai; Qingxian Luan
Purpose: To establish a digital assessment method for changes in gingiva morphology following initial periodontal therapy. Methods: Ten periodontal-healthy participants were selected, and digital models obtained by intraoral scanning and digitizing conventional impressions. Using dentition as a reference, best fit alignment between digital models was carried out. Root mean square (RMS) was calculated
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Effects of heating on the physical properties of premixed calcium silicate-based root canal sealers J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Shinya Yamauchi; Satoshi Watanabe; Takashi Okiji
The purpose of this study was to examine the effect of heating on the physical properties of four types of premixed calcium silicate-based root canal sealers. Endoseal MTA, Well-Root ST, EndoSequence BC Sealer, EndoSequence BC Sealer HiFlow, and AH Plus (epoxy resin root canal sealer) were heated at 100°C for 1 min, and changes in setting time, flow, and film thickness were evaluated in accordance
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Influence of single post, oval, and multi-post restorative techniques and amount of residual tooth substance on fracture strength of endodontically treated maxillary premolars J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Valentina Spicciarelli; Crystal Marruganti; Carla Di Matteo; Marco Martignoni; Hani Ounsi; Tiziana Doldo; Marco Ferrari; Simone Grandini
Purpose: The aim of this study was to compare the influence of the number of coronal walls and post-endodontic restorations on the mechanical strength of 165 recently extracted endodontically treated maxillary premolars. Methods: The teeth were divided into 3 control (no post) and 3 test groups according to the number of residual walls. Each test group was divided into subgroups according to the type
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Combined effects of soft drinks and nicotine on Streptococcus mutans metabolic activity and biofilm formation J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Lamia S. Mokeem; Lisa H. Willis; L. Jack Windsor; N. Blaine Cook; George Eckert; Richard L. Gregory
The purpose of this study was to explore the effects of nicotine on the activity of Streptococcus mutans (S. mutans) in soft drinks. Regular soft drinks contain large proportions of high-fructose corn syrup (HFCS), which increases the activity of S. mutans resulting in high-caries risk compared with sugar-free soft drinks. Nicotine use exhibits a strong correlation with increased S. mutans biofilm
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Relationship between oral intake level and oral health assessment tool scores in the convalescent ward J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Enri Nakayama; Haruka Tohara; Mitsuyasu Sato; Kimiko Abe; Masanori Kimura; Mao Watanabe; Masato Iida; Koichiro Ueda
Purpose: To examine the relationship between oral intake function and oral health status in convalescent inpatients. Methods: Subjects were 222 patients admitted to a convalescent hospital between 1 January and 30 June 2018. Investigation items were age, sex, causative disease, body mass index, functional oral intake scale (FOIS), functional independence measure, occlusal contact, assistance with oral
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Morphological characteristics of interalveolar septum and mandible in BMAL1 gene knockout mice J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Ryosuke Koshi; Kunihito Matsumoto; Yusuke Imanishi; Takayuki Kawato; Shuichi Sato; Shigeki Shimba; Yoshinori Arai; Kazuya Honda
Purpose: Circadian rhythm is associated with the pathogenesis of systemic disease and bone mineral metabolism. This study aimed to radiographically evaluate morphological characteristics of the interalveolar septum in circadian rhythm deficient animals. Methods: Heads of 10 brain and muscle arnt-like protein-1 (BMAL1)-knockout (KO) mice and 10 wild-type mice sacrificed at 36 weeks were imaged using
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Evaluation of cone-beam computed tomography over a small field of view in a water bath based on the modulation transfer function with repeating-edge oversampling J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Motohiro Ito; Yusuke Hayashi; Kunihito Matsumoto; Yoshinori Arai; Kazuya Honda
Purpose: The spatial resolution of cone-beam computed tomography (CBCT) in small fields of view (FOVs) is important for clinical applications. However, it is difficult to measure spatial resolution reliably due to error factors such as noise. The aim of this study was to obtain a modulation transfer function (MTF) more accurately. Methods: A CBCT apparatus was used with small FOV. An aluminum pipe
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Risk factors for abutment and implant fracture after loading J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Hiroshi Murakami; Kentaro Igarashi; Megumi Fuse; Tsuyoshi Kitagawa; Mitsuhiko Igarashi; Satoshi Uchibori; Chiaki Komine; Hiroya Gotouda; Hiroyuki Okada; Yasuhiko Kawai
Purpose: Implant component fractures are one of the most serious complications in implant treatment. With a better understanding of the risk factors for fracture in the preoperative, surgery, superstructure, and post-loading phases of implant treatment, low-risk treatment could reduce implant component fractures, leading to a better prognosis. The aim of this study was to clarify the risk factors for
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A web-based survey of denture adhesive use among denture wearers 40 years of age and older. J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Yohei Okazaki,Yasuhiko Abe,Kana Dainobu,Shogo Iwaguro,Ryoji Kato,Kazuhiro Tsuga
The purpose of this study was to clarify the usage and understanding of denture adhesives among 1,825 denture wearers, aged 40 years and older in Japan, using a web-based survey. The NTTCom Online survey (a closed investigation) was conducted over a period of 4 days using a 13-item questionnaire about denture adhesives. Results showed that 67.1% of the respondents were satisfied with their dentures;
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A simple sandwich technique using buttons combined with a tie-over technique for an intraoral split-thickness skin graft J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Osamu Takahashi; Junpei Tanaka; Manabu Habu; Daigo Yoshiga; Masaaki Sasaguri; Masataka Uehara; Mana Hayakawa; Izumi Yoshioka; Kazuhiro Tominaga
A simple sandwich technique using buttons to compress grafted tissue combined with a tie-over technique for intraoral split-thickness skin grafts (STSGs) is introduced. This technique yielded an excellent engraftment rate (90.5%) and no instances of total graft failure were recorded. This simple sandwich technique for STSGs is readily applicable and inexpensive, and the present results show that it
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Perception of pungent, gustatory and olfactory stimuli in patients with congenital insensitivity to pain with anhidrosis J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Natsumi Tsuchihashi; Naoko Uehara; Zenzo Miwa; Naomi Yoshida; Kumiko Sugimoto
Congenital insensitivity to pain with anhidrosis (CIPA) is a rare disease caused by a mutation in the nerve growth factor (NGF) receptor, which results in an absence of Aδ and C fibers. It can be considered that this defect may also lead to deterioration of oral sensations. The aim of the present study was to clarify the ability of CIPA patients to perceive pungent, gustatory, and olfactory stimuli
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Guidelines for innovation in dental education during the coronavirus disease 2019 pandemic J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Guang Hong; Tsai-Yu Chang; Andrew Terry; Supachai Chuenjitwongsa; Young-Seok Park; James K. Tsoi; M. F. Lindawati S. Kusdhany; Hiroshi Egusa; Satoru Yamada; Jae-Sung Kwon; Liang-Lin Seow; Ma. Cristina A. G. Garcia; Mun-Loke Wong; Prim Auychai; Ming-Lun Hsu
During the current coronavirus disease 2019 (COVID-19) pandemic, dental education and training requiring face-to-face interaction must prioritize infection prevention and the safety of students, staff, and patients. In July 2020, the Association for Dental Education, Asia Pacific (ADEAP) published safety guidelines for safe dental education during the COVID-19 pandemic. These guidelines summarize ADEAP
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Potential of pure cellulose nanofibers as a denture base material J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Yukiko Yamazaki; Takao Ito; Toru Ogawa; Guang Hong; Yukie Yamada; Taizo Hamada; Keiichi Sasaki
A study was conducted to evaluate the basic mechanical properties of a pure cellulose nanofiber (CNF) material in comparison with a commercial denture base material (polymethylmethacrylate [PMMA] acrylic resin). The working hypothesis was that CNFs have potential for use as denture base materials. Pure CNF specimens fabricated under various conditions were examined. The flexural strength (FS) and flexural
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A multicenter prospective cohort study on the effect of smoking cessation on periodontal therapies in Japan J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Yohei Nakayama; Koji Mizutani; Yuka Tsumanuma; Hiroyuki Yoshino; Norio Aoyama; Koji Inagaki; Manabu Morita; Yuichi Izumi; Shinya Murakami; Hidenori Yoshimura; Takanori Matsuura; Takashi Murakami; Matsuo Yamamoto; Nobuo Yoshinari; Masaru Mezawa; Yorimasa Ogata; Atsutoshi Yoshimura; Kanji Kono; Kosuke Maruyama; Soh Sato; Ryuji Sakagami; Hiroshi Ito; Yukihiro Numabe; Masahiko Nikaido; Takashi Hanioka;
Few prospective studies have reported the effects of periodontal therapy on patients who attempted to quit smoking. This study aimed to assess how smoking cessation affects periodontal therapy. Twenty-five smokers with periodontitis were investigated by dividing them into two groups, a smoking cessation support group and a continued smoking group. Those in the support group received counseling and
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Fabrication of titanium restoration by means of calcium aluminate-bonded magnesia investment material and one-chamber arc casting apparatus J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Mika Furuchi; Yoshimasa Takeuchi; Atsushi Kamimoto; Hideo Matsumura; Hideyuki Imai; Hiroyasu Koizumi
Cast titanium restoration for molars has high biocompatibility and is covered by the Japanese national health insurance. Titanium casting requires specific investment material and casting apparatus. A cast restoration for the mandibular left second molar was fabricated using titanium in this study. A wax pattern fabricated on a definitive cast was invested in calcium aluminate-bonded magnesia investment
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Oral multicentric carcinoma arising from four different sites in a female patient. J. Oral Sci. (IF 1.2) Pub Date : 2020-12-23 Hisataka Kitano,Souichi Aizawa,Atsushi Mamiya,Tomoya Nagai,Yusuke Fujiwara,Chiaki Hidai
This report discusses a case of a 75-year-old female patient with metachronous multicentric carcinomas in the oral cavity at 4 different sites. In this patient, there were no generally associated characteristics, such as drinking alcohol, chewing betel quid or smoking cigarettes. However, her elder sister died due to oral carcinoma. Although well-known risk factors for oral carcinoma were not detected
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Surgical treatment of enophthalmos in children and adolescents with pure orbital blowout fracture J. Oral Sci. (IF 1.2) Pub Date : 2020-12-28 Piotr Koryczan; Jan Zapała; Michał Gontarz; Grażyna Wyszyńska-Pawelec
Purpose: This study evaluated outcomes of surgical treatment for enophthalmos after pediatric orbital blowout fracture. Associations of fracture type, fracture site, time from injury to treatment, and type of surgical procedure with treatment outcomes were assessed. Methods: The medical records of 200 children and adolescents (38 girls and 162 boys) with orbital fractures treated in the authors’ department
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Degree of conversion of two self-adhesive resin luting cements through different lengths of fiber post J. Oral Sci. (IF 1.2) Pub Date : 2020-12-24 Abdul Khabeer; Syed Z. Ahmed; Mukarram Zubair; Muhammad A. Faridi; Mamdouh A. Al-Harthi
Purpose: To evaluate the degree of conversion (DoC) of self-adhesive resin luting cements when irradiated through different fiber post lengths. Methods: A total of 60 teeth were sectioned to achieve lengths of 4 mm, 7 mm, and 10 mm, while 60 fiber posts were trimmed to give 3 mm, 6 mm, and 9 mm lengths. Post space was created to accommodate the fiber post and 1 mm of luting cement apically. Two self-adhesive
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Clinical outcomes of single crown restorations fabricated with resin-based CAD/CAM materials. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Futoshi Komine,Junichi Honda,Kosuke Kusaba,Kei Kubochi,Hiroki Takata,Masanori Fujisawa
Computer-aided design/computer-aided manufacturing (CAD/CAM) restorative materials have been widely used owing to a number of advantages, including stable quality of the materials, lower costs, and time-saving factors. Resin-based CAD/CAM materials for definitive restorations are classified into two groups: dispersed nanoparticle-filled composite resin and polymer-infiltrated-ceramic-network materials
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Factors associated with discontinuation and resumption of implant maintenance therapy. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Chika Arimizu,Yasunori Ayukawa,Rika Kuwatsuru,Satoru Haresaku,Yasuyuki Matsushita,Kiyoshi Koyano
Discontinuation of implant maintenance is the main risk factor for implant failure. The purpose of this study was to identify factors associated with previous discontinuation and resumption of maintenance among implant patients. A questionnaire survey was sent to 171 patients receiving implant maintenance at a university hospital; 169 patients responded. To assess the effect of job status, 26 patients
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The teeth and dentition of the filefish (Stephanolepis cirrhifer) revisited tomographically. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Hirofumi Kanazawa,Maki Yuguchi,Yosuke Yamazaki,Keitaro Isokawa
The upper and lower tooth-bearing jaws of the filefish (Stephanolepis cirrhifer) were scanned using a micro-CT system in order to address the existing gaps between the traditional pictures of the morphology and histology. 2D tomograms, reconstructed 3D models and virtual dissection were employed to examine and evaluate the in situ geometry of tooth implantation and the mode of tooth attachment both
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Risk factors of head and neck cancer mortality compared with those of all-cause and all-cancer mortalities. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Hye Min Cho,Dae-Woo Lee,Jeong Jae Park,Hye Mi Choi,Nam-Pyo Cho
This study aimed to clarify the risk factors of head and neck cancer (HNC) mortality, relative to those of all-cause and all-cancer mortalities, using the Korean National Health Insurance Service-Health Screening Cohort (NHIS-HEALS) data set. Data from 238 HNC deaths, 14,769 all-cancer deaths, and 38,086 all-cause deaths were extracted during a median follow-up period of 9.5 years. Baseline characteristics
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Angiostatin-functionalized collagen scaffolds suppress angiogenesis but do not induce chondrogenesis by mesenchymal stromal cells in vivo. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Espen Helgeland,Torbjørn O Pedersen,Ahmad Rashad,Anne C Johannessen,Kamal Mustafa,Annika Rosén
Tissue engineering for fibrocartilage regeneration using mesenchymal stromal cells (MSC) and biomaterial scaffolds is emerging as a promising strategy, but inhibiting vascularization to prevent endochondral ossification is important to develop stable implants. The objective of this study was to investigate the effect of angiostatin on inhibition of angiogenesis and promotion of chondrogenesis by collagen
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Mechanical effects of residual bone mass, a maxillofacial prosthesis, and a reconstruction plate on the mandible after marginal resection. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Takeshi Kase,Tetsuo Ohyama,Shinya Nakabayashi,Hiroyasu Yasuda,Takayuki Yoneyama
In this study, analytic models were used to simulate marginal resection in the area of the second premolar to the second molar region, and the mechanical effects on the mandible of residual bone mass, a maxillofacial prosthesis, and a reconstruction plate were evaluated by three-dimensional finite element analysis. As residual bone mass decreased, maximum principal stress increased near the anterior
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Properties of heat-sensitive neurons in the premotor cortex of conscious monkeys. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Shumpei Unno,Masamichi Shinoda,Kumi Soma,Asako Kubo,Barry J Sessle,Tomoyuki Matsui,Masatoshi Ando,Junichi Asaka,Katsuhiko Otsuki,Hisashi Yonemoto,Hiroki Onose,Kousuke Sakanashi,Koichi Iwata
To investigate neuronal activity involved in responses to noxious stimuli in conscious monkeys, the animals were subjected to a task that required them to detect a small change in facial skin temperature or light (second temperature: T2, second light: V2) relative to an initial condition (T1 or V1), and to detect changes in V2 along with a heat task. Recordings were obtained from 57 neurons in the
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Analgesic effect of gum chewing in patients with burning mouth syndrome. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Naohiko Sekine,Akiko Okada-Ogawa,Sayaka Asano,Daiki Takanezawa,Chisa Nishihara,Natsuko Tanabe,Yoshiki Imamura
The cause of burning mouth syndrome (BMS) is unknown. Although no effective treatment has been established, BMS patients frequently chew gum to alleviate pain. To identify the cause and new treatments for BMS, this study investigated the psychophysical and pharmacological properties of gum chewing to better understand its pain-relieving effects. In this prospective, blinded study, plasma catecholamine
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SSEA-3 and 4 are not essential for the induction or properties of mouse iPS cells. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Kazunori Hamamura,Hiroshi Hotta,Yoshiki Murakumo,Hidenobu Shibuya,Yuji Kondo,Koichi Furukawa
Stage-specific embryonic antigens (SSEA-1, 3, and 4) are carbohydrate antigens that have been used as markers of embryonic stem (ES) cells. However, the roles of these antigens in the establishment and maintenance of stemness of ES and induced pluripotent stem (iPS) cells are still poorly understood. This study investigated the biological and functional significance of globo-series glycolipids such
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Retrospective study comparing the clinical outcomes of bar-clip and ball attachment implant-supported overdentures. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Bruno R Chrcanovic,Peyman Ghiasi,Jenö Kisch,Liselott Lindh,Christel Larsson
The aim of this study was to compare the clinical outcomes of implant-supported overdentures (ODs) with either bar-clip or ball attachments. The implant, prosthesis failure, and technical complications were the outcomes analyzed in this retrospective clinical study conducted in a specialty clinic. Seventy-five patients with 242 implants supported by 76 ODs (36 maxillary, 40 mandibular) were included
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Performance of Schwann cell transplantation into extracted socket after inferior alveolar nerve injury in a novel rat model. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Tatsuaki Ito,Taku Toriumi,Keita Otake,Yuta Okuwa,Sho Tanaka,Yoshinori Arai,Kenichi Kurita,Masaki Honda
An inferior alveolar nerve (IAN) injury is a common clinical problem that can affect a patients’ quality of life. Cellular therapy has been proposed as a promising treatment for this injury. However, the current experimental models for IAN injury require surgery to create bone windows that expose the nerve, and these models do not accurately mimic human IAN injuries. Therefore, in this study, a novel
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Cross-sectional study of age-specific differences in salivary occult blood test results in older adults. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Chiaki Matsubara,Junichi Furuya,Yutaka Watanabe,Michiyo Obana,Maki Shirobe,Yuki Ohara,Ayako Edahiro,Junko Nakajima,Keiko Motokawa,Hiroki Inagaki,Hirohiko Hirano,Shunsuke Minakuchi,Shoji Shinkai,Shuichi Awata
This study aimed to identify factors associated with poor oral health status, as indicated by salivary occult blood (SOB) level, in community-dwelling older adults. A total of 592 community-dwelling participants aged 70 to 84 years with 20 to 28 teeth participated in the survey and SOB evaluation. Survey items included behaviors during dental visits, systemic diseases, smoking habit, cognitive function
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Evaluation of in vitro biofilm elimination of Enterococcus faecalis using a continuous ultrasonic irrigation device. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Jennifer Galván-Pacheco,Marlen Vitales-Noyola,Ana M González-Amaro,Heriberto Bujanda-Wong,Antonio Aragón-Piña,Verónica Méndez-González,Amaury Pozos-Guillén
This study sought to evaluate biofilm elimination using the HBW Ultrasonic Ring based on continuous ultrasonic irrigation. Forty-five premolars and molars with complex curvatures were included. An Enterococcus faecalis biofilm was established for 30 days on the extracted teeth. The teeth were then stratified into three experimental groups for instrumentation and irrigation (i.e. HBW Ultrasonic Ring
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Mechanical properties of a polymethyl methacrylate block for CAD/CAM dentures. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Maiko Iwaki,Manabu Kanazawa,Toshio Arakida,Shunsuke Minakuchi
This study compared the mechanical properties and molecular distribution of a polymethyl methacrylate (PMMA) block (Dry) with specimens that were fabricated by a conventional method and cured in a wet environment (Control). Two specimen types were fabricated with heat-curing denture base resin. Dry specimens were polymerized at high pressure and in a dry system, while Control specimens were polymerized
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Glucose transporter 4 mediates LPS-induced IL-6 production in osteoblasts under high glucose conditions. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Shunichiro Kato,Natsuko Tanabe,Mayu Nagao,Jumpei Sekino,Keiko Tomita,Mayu Sakai,Kimiko Abe,Naoto Suzuki,Koichiro Ueda
Purpose: Diabetes causes hyperglycemic disorders due to insufficient activity of insulin, and it also increases blood glucose level. Recent studies have reported the relationship between diabetes and periodontal disease. Periodontitis is advanced by inflammatory cytokines stimulated with LPS. The purpose of this study was to investigate the effects of hyperglycemia on the expression of inflammatory
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Microleakage of resin infiltration in artificial white-spot lesions. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Awiruth Klaisiri,Suksantiphop Janchum,Kunyakorn Wongsomtakoon,Panukorn Sirimanathon,Nantawan Krajangta
This study examined the effectiveness of resin infiltration in inhibiting microleakage from artificial white-spot lesions (AWL) in enamel. Fifty sound extracted premolars were selected and randomly divided into five groups (n = 10 each). Group 1 included sound teeth. In contrast, an AWL was created in all specimens in groups 2 to 5, as follows—Group 2: AWL with no treatment; Group 3: AWL treated with
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Practicability of a chairside approach for characterizing CAD/CAM resin-based composites. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Dominic Gold,Sebastian F Hahnel,Oliver Schierz,Angelika Rauch
Perception of tooth shades is subjective and not rated exactly the same by different individuals. In terms of dental esthetics, chairside individualization of dental restorations might help to improve patient satisfaction. This investigation aimed to validate the practicability of a chairside approach for staining resin-based composite restorations. Thirteen inexperienced and 13 experienced participants
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Effects of butyric acid, a bacterial metabolite, on the migration of ameloblastoma mediated by laminin 332. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Taichi Ishikawa,Jun Terashima,Yu Shimoyama,Yu Ohashi,Toshinari Mikami,Yasunori Takeda,Minoru Sasaki
Ameloblastoma is a benign tumor that develops in the jawbone. Occasionally, however, it may become malignant and metastasize to other tissues. Although it has been suggested that various cytokines and several adhesion factors may play a role in its malignant transformation, the details have not been elucidated. In this context, it has been reported that butyric acid produced by periodontopathic bacteria
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Effect of modified tray design on accuracy of different impression techniques for parallel and divergent implants. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Liem Dang,Matthew Woliansky,Joseph Palamara,Jaafar Abduo
This study evaluated the effect of a modified tray design on the accuracy of implant impressions in comparison with the non-splinted and splinted impression techniques. Two titanium frameworks were produced to fit two parallel implants and two divergent implants with a 15o angle. According to the frameworks employed, two acrylic resin master models were fabricated. For each model, 10 impressions were
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Shear bond strength and interfacial analysis of high-viscosity glass ionomer cement bonded to dentin with protocols including silver diammine fluoride. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Philippe François,Joseph Greenwall-Cohen,Stéphane Le Goff,Nathalie Ruscassier,Jean-Pierre Attal,Elisabeth Dursun
Purpose: High-viscosity glass ionomer cements (HV-GICs) are reinforced with ultrafine, highly reactive glass particles, as well as a higher-molecular-weight polyalkenoic acid component. Silver diammine fluoride (SDF) is an agent with promising activity against active caries. The present study aimed to evaluate the shear bond strength (SBS) and interfacial morphology of a new HV-GIC bonded to dentin
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A preliminary study of the scope of practice of dental hygienists and oral health providers in Asia. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Yukiko Takahashi,Hisako Hikiji,Tatsuji Nishihara
The aim of the present study was to gather information to clarify the scope of oral health services in Asia, focusing particularly on the role of dental hygienists, anticipating that international exchange of data on oral health would benefit the establishment of such systems in other countries. Data on oral health providers were obtained from reliable sources, cited reports and professional websites
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Emerging challenges and possible strategies in maxillo-facial and oral surgery during the COVID-19 pandemic. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Mattia Di Bartolomeo,Arrigo Pellacani,Sara Negrello,Luigi Chiarini,Alexandre Anesi
The Coronavirus disease 2019 (COVID-19) pandemic suddenly took the world by storm and Italy was one of the hardest hit countries. Maxillo-facial surgery and dentistry procedures had to be significantly reorganized, since they are considered high-risk procedures. Protocols had to be changed and interdepartmental cooperation was put in place to plan surgical interventions and maintain high standards
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Orofacial complex regional pain syndrome. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Mythili Kalladka,Hussein Alhasan,Nagaraju Morubagal,Noboru Noma,Junad Khan
Complex regional pain syndrome (CRPS)—an extremely painful primary pain disorder related to trauma—is rare in the orofacial region. The authors describe a case of orofacial CRPS with a clinical phenotype that fits the Budapest diagnostic criteria. A 39-year-old female patient presented with left-side facial pain that had been untreated for 10 months. Symptoms included burning pain and allodynia accompanied
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Minimally invasive technique for non-vital tooth bleaching using traditional Japanese paper. J. Oral Sci. (IF 1.2) Pub Date : 2020-09-26 Carlos A Jurado,Akimasa Tsujimoto,Jose Villalobos-Tinoco,Hidehiko Watanabe,Toshiki Takamizawa,Masashi Miyazaki
The purpose of this case report is to describe a minimally invasive technique for non-vital tooth bleaching using traditional Japanese paper, known as washi. Non-vital tooth bleaching with a mixture of sodium perborate and 30% hydrogen peroxide rolled in Japanese paper for a traumatically injured tooth, and in-office vital-tooth bleaching for the upper front six teeth and first premolars, were performed
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Biological responses to pediatric stainless steel crowns. J. Oral Sci. (IF 1.2) Pub Date : 2020-06-23 Sobia Zafar,Allauddin Siddiqi
A systematic review was conducted to identify the biological responses, allergic reaction, hypersensitivity, toxicity, and ion release profile associated with pediatric stainless steel crowns (SSCs) in the existing literature. A systematic search was undertaken according to the Preferred Reporting Items for Systematic Reviews and Meta-analyses guidelines. The inclusion criteria consisted of patients
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Detection of hepatocyte growth factor in oral rinses using water for possible periodontal diagnosis. J. Oral Sci. (IF 1.2) Pub Date : 2020-06-23 Shinta Suzuki,Akira Aoki,Sayaka Katagiri,Shogo Maekawa,Kenichiro Ejiri,Sophannary Kong,Mizuki Nagata,Yoko Yamaguchi,Mitsuhiro Ohshima,Yuichi Izumi
The aim of this study is to analyze the relationship between Hepatocyte Growth Factor (HGF) levels in oral rinses using water and clinical parameters of periodontitis; and furthermore, to evaluate the potential of a prototype HGF immunochromatographic paper test strip (HGF-TS) for screening of periodontitis, in comparison with a commercially-available occult blood (hemoglobin) test strip (Hb-TS). Clinical
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Synthesis and characterization of a methacrylate monomer with a thiohydantoin structure. J. Oral Sci. (IF 1.2) Pub Date : 2020-06-23 Hideo Matsumura,Katsunori Kojima,Shigeru Mio,Takashi Yamamoto,Akihisa Kodaira,Hiroyasu Koizumi
The purpose of the current study was to synthesize a methacrylate monomer with a thiohydantoin structure. In a flask, (2-thiohydantoin-4-yl) propionic acid, 10-hyroxydecyl methacrylate, 4-dimethylaminopyridine, and tetrahydrofuran (THF) were placed in a nitrogen atmosphere. A THF solution of N,N’-dicyclohexylcarbodiimide was added and stirred at room temperature. Ethyl acetate and n-hexane were then
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Wettability and pre-osteoblastic behavior evaluations of a dense bovine hydroxyapatite ceramics. J. Oral Sci. (IF 1.2) Pub Date : 2020-06-23 Luara A Pires,Camila R de Meira,Cintia K Tokuhara,Flávia A de Oliveira,Vanessa B Dainezi,Marcia S Zardin Graeff,Carlos A Fortulan,Rodrigo C de Oliveira,Regina M Puppin-Rontani,Ana Flávia S Borges
In this study, the wettability, cell viability, and roughness of an experimental dense bovine hydroxyapatite [Ca10(PO4)6(OH)2] ceramic block were evaluated so that, in the future, it could be used as a base material for dental implants. The results to commercial zirconia and a commercially pure titanium (Ti) alloy were compared. The surface roughness and contact angles were measured. An in vitro evaluation
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Orexins modulate membrane excitability in rat trigeminal motoneurons. J. Oral Sci. (IF 1.2) Pub Date : 2020-06-23 Susumu Tanaka,Masataka Higuchi,Soju Seki,Akifumi Enomoto,Mikihiko Kogo
Orexins (Oxs) are multifunctional neuropeptides, secreted from the lateral hypothalamus, that stimulate feeding behavior and energy expenditure. In this study, the direct effects of Oxs on the membrane properties of trigeminal motoneurons (TMNs) were examined, which critically participate in the genesis of rhythmical oral motor activities underlying suckling and mastication. Sprague-Dawley rats (3-6
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