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Effect of in vitro aging and acidic storage on color, translucency, and contrast ratio of monolithic zirconia and lithium disilicate ceramics J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-24 Anna Theocharidou; Eleana Kontonasaki; Ioanna Koukousaki; Alexandra Koumpouli; Ioanna Betsani; Petros Koidis
Statement of problem How the translucency and color of ceramic restorations are affected by surface changes from the corrosive environment in the oral cavity and aging of materials is unclear. Purpose The purpose of this in vitro study was to compare the impact of acidic exposure and aging on the color and translucency of monolithic zirconia and lithium disilicate ceramics. Material and methods Twenty
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Clinical outcomes of veneered zirconia anterior partial fixed dental prostheses: A 12-year prospective clinical trial J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-23 María Fernanda Solá-Ruiz; Raquel Leon-Martine; Carlos Labaig-Rueda; Eduardo Selva-Otalaorrouchi; Rubén Agustín-Panadero
Statement of problem Anterior veneered zirconia partial fixed dental prostheses (FDPs) have substituted for metal-ceramic to improve esthetics and biocompatibility. However, the material is susceptible to aging or hydrothermal degradation and to chipping of the feldspathic veneer. Whether these susceptibilities limit the clinical performance of anterior veneered zirconia FPDs is unclear. Purpose The
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Effect of different surface treatments on the bond strength of milled polyetheretherketone posts J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-22 Mazen A. Attia; Tamer E. Shokry; Mohamed Abdel-Aziz
Statement of problem Polyetheretherketone (PEEK) can be used as a framework material for removable and fixed dental prostheses. However, information about the use of PEEK as a post-and-core restoration is scarce. Purpose The purpose of this in vitro study was to evaluate the effect of different surface treatments on the push-out bond strength of milled polyetheretherketone posts to resin cement. Material
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Complete denture fabrication with polyetherketoneketone as a framework material: A clinical report J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-20 Ling Ding; Wei Lu; Xi Chen; Qi Xi; Guofeng Wu
This clinical report describes the fabrication of conventional complete dentures with polyetherketoneketone (PEKK) frameworks made with computer-aided design and computer-aided manufacturing (CAD-CAM). No biologic or prosthetic complications were observed at the 1-year follow-up.
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Color perceptibility and validity of silicon carbide–based protective coatings for dental ceramics J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-19 Chaker Fares; Randy Elhassani; Fan Ren; Alexandra R. Cabrera; Ingrid Chai; Dan Neal; Shu-Min Hsu; Josephine F. Esquivel-Upshaw
Statement of problem A silicon carbide (SiC) protective coating has been developed for dental ceramics, but whether the coated ceramics can match the classical VITA shades is unclear. Purpose The purpose of this observational in vitro study was to evaluate the color adaptability of SiC-coated dental ceramics by testing the hypotheses that SiC-coated disks can be fabricated to match standard tooth shades
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Effect of fatigue loading and failure mode of different ceramic implant abutments J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-19 Rubén Cárdenas; Diana Sánchez; Raúl Euán; Arturo M. Flores
Statement of problem Currently many options are available for restoring a dental implant, although the ideal implant abutment for withstanding the occlusal load and the restorative material for fulfilling the esthetic need remains unclear. Zirconia (Zir) abutments offer good esthetics, but concerns still remain regarding their fracture strength, complex fabrication, and higher cost as compared with
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Effects of tightening torque on screw stress and formation of implant-abutment microgaps: A finite element analysis J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-17 Bruna Santos Honório Tonin; Yiting He; Ning Ye; Hooi Pin Chew; Alex Fok
Statement of problem The mechanical behavior of the conical connection implant with different torque levels requires evaluation. Purpose The purpose of the finite element analysis study was to investigate the impact of abutment screw torque on the formation of microgaps at the implant-to-abutment interface of a conical connection under oblique loading. This is important because it is thought that bacteria
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Effect of tropical outdoor weathering on the surface roughness and mechanical properties of maxillofacial silicones J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-17 Ahmed Mushfiqur Rahman; Nafij Bin Jamayet; Md Minhaz Ul Islam Nizami; Yanti Johari; Adam Husein; Mohammad Khursheed Alam
Statement of problem The climate of tropical Southeast Asia includes high humidity and ultraviolet radiation that reduce the lifespan of silicone prostheses by inducing changes in their mechanical properties and color stability. Studies on the surface roughness (SR) and mechanical properties of different silicone elastomers (SEs) subjected to the natural tropical weather of Southeast Asia are lacking
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Fungicidal and inhibitory efficacy of cinnamon and lemongrass essential oils on Candida albicans biofilm established on acrylic resin: An in vitro study J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-16 Suwan Choonharuangdej; Theerathavaj Srithavaj; Supanut Thummawanit
Statement of problem It is unclear whether cinnamon and lemongrass essential oils can effectively reduce the Candida-biofilm frequently formed on dental devices made from heat-polymerized polymethyl methacrylate (PMMA) resin that contributes to the development of mild oropharyngeal as well as life-threatening candidiasis in patients wearing the devices. Purpose The purpose of this in vitro study was
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Determining of canine position by multiple facial landmarks to achieve natural esthetics in complete denture treatment J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-16 Natchalee Srimaneekarn; Tawepong Arayapisit; Ornnicha Pooktuantong; Holland R. Cheng; Pan Soonsawad
Statement of problem Anterior tooth selection is an important step in complete denture treatment as it plays a pivotal role not only in esthetics but also in mastication and pronunciation. However, conventional methods for tooth selection are not well established and rely on facial measurements and proportions, which vary among different ethnicities. Purpose The purpose of this clinical study was to
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Cervical tooth anatomy considerations for prefabricated anatomic healing abutment design: A mathematical formulation J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-16 János Vág; George Freedman; Enikő Szabó; László Románszky; Gábor Berkei
Statement of problem A custom emergence profile offers the ideal horizontal dimensions for an anatomic healing abutment. However, developing such an emergence profile can be a time-consuming and complex process. Purpose The purpose of this study was to develop a mathematical formula defining horizontal cervical tooth geometry to design prefabricated, tooth-specific, healing abutments. Material and
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Occlusal force and occlusal contact reestablishment with resin-bonded fixed partial dental prostheses using the Dahl concept: A clinical study J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-15 Rostam Iffendi Idris; Yoshinobu Shoji; Tong Wah Lim
Statement of problem Space creation for a metal retainer of the resin-bonded fixed partial dental prostheses (RBFPDPs) with the Dahl concept remains controversial because of the lack of clinical studies. Purpose The purpose of this clinical study was to investigate the occlusal force and occlusal contact reestablishment of RBFPDPs cemented at an increased occlusal vertical dimension (the Dahl concept)
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Effect of a vinegar-hydrogen peroxide mixture on the surface properties of a cobalt-chromium alloy: A possible disinfectant for removable partial dentures J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-15 Alexandra Feldmann; Larissa Dolfini Alexandrino; Vinicius Rodrigues dos Santos; Myriam Pereira Kapczinski; Sara Fraga; Wander José da Silva; Cristiane Machado Mengatto
Statement of problem A vinegar-hydrogen peroxide mixture has been reported to be effective in eliminating Candida albicans and Staphylococcus aureus from acrylic resin, and its action has been reported to be comparable with that of sodium hypochlorite or peracetic acid. However, the effects of this mixture on cobalt-chromium alloys remain unknown. Purpose The purpose of this in vitro study was to evaluate
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Fracture resistance of cement-retained and screw-cement–retained milled posterior crowns with screw-access hole preparations before and after firing: An in vitro study J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-15 Jesus Enrique Cabrera; Donald M. Belles; Ruben A. Sauceda; Dianna M. Arriaga; Joe C. Ontiveros
Statement of problem When a cement-retained lithium disilicate crown needs to be removed, perforation is needed to reach the abutment screw. How this process affects its strength is unclear. Purpose The purpose of this in vitro study was to evaluate the fracture strength of milled lithium disilicate implant crowns with screw-access holes created before and after the firing stages. Material and methods
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Comparison of CAD-CAM and traditional chairside processing of 4-unit interim prostheses with and without cantilevers: Mechanics, fracture behavior, and finite element analysis J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-15 Carolina Coelho; Catarina Calamote; António Correia Pinto; José L. Esteves; António Ramos; Tomás Escuin; Júlio C.M. Souza
Statement of problem How processing by computer-aided design and computer-aided manufacturing (CAD-CAM) or traditional chairside fabrication techniques affects the presence of defects and the mechanical properties of interim dental prostheses is unclear. Purpose The purpose of this in vitro study was to compare the effects of CAD-CAM versus traditional chairside material processing on the fracture
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Effect of dopaminergic agonist group of drugs in treatment of sleep bruxism: A systematic review J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-15 Bappaditya Bhattacharjee; Ritu Saneja; Atul Bhatnagar; Pinki Gupta
Statement of problem Various factors are responsible for sleep bruxism; however, whether the dopaminergic agonist group of drugs is effective in the treatment of sleep bruxism is unclear. Purpose The purpose of this systematic review was to evaluate the effect of the dopaminergic agonist group of drugs in controlling sleep bruxism in comparison with no treatment or placebo-controlled treatment. Material
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Fabrication of a facially generated tooth reduction guide for minimally invasive preparations: A dental technique J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-14 Lucas Caponi; Fady Raslan; Miguel Roig
This article describes a 3D virtual diagnostic analysis for treatment planning an esthetically driven functional rehabilitation by using computer-aided design and computer-aided manufacturing (CAD-CAM) technology. In this protocol, a digitally planned diagnostic waxing (exocad DentalCAD) was used to visualize the proposed tooth position and the presence of areas without sufficient material thickness
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Evaluation of material waste, dimensional stability, and detail reproduction of polyvinyl siloxane impression materials mixed with different mixing tips J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-14 Ana Teresa Maluly-Proni; Juliana Aparecida Delben; André Luiz Fraga Briso; Fabiano Carlos Marson; Paulo Henrique dos Santos
Statement of problem Redesigned mixing tips, promising less impression material waste, have been marketed. However, whether their use adversely affects the dimensional stability and detail reproduction of the impression material is unclear. Purpose The purpose of this in vitro study was to evaluate the dimensional stability, detail reproduction, and material waste of different polyvinyl siloxane impression
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Accuracy of 3-dimensional printing of dental casts: A proposal for quality standardization J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-14 Gian Battista Greco; Davide Popi; Danilo Alessio Di Stefano
Statement of problem A digital workflow in fixed prosthodontics may use a 3D printer to obtain a cast for porcelain application. Standards exist that define the accuracy of traditional casts, but the accuracy requirements of 3D-printed casts have not been defined. Purpose The purpose of this retrospective study was to investigate how the accuracy of 3D-printed casts affected prosthesis fit and whether
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Zygomatic implant-supported prosthodontic rehabilitation of edentulous patients with a history of cleft palate: A clinical report J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-14 Johanna Leven; Rahat Ali; Chris J. Butterworth
Zygomatic implants are an established treatment option in the management of the atrophic maxilla and in oncology rehabilitation, but evidence for their use in patients with a history of cleft palate is sparse. Zygomatic implants were used to retain a maxillary prosthesis in 7 edentulous patients with an unrepaired or repaired cleft lip and palate. Patient records were reviewed retrospectively to assess
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Interdisciplinary rehabilitation of a patient with ectodermal dysplasia utilizing digital tools: A clinical report J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-14 Luiz H. Gonzaga; Karina P. Amorim; Newton Sesma; William C. Martin
The present clinical report describes the rehabilitation of a patient diagnosed with ectodermal dysplasia performed by an interdisciplinary team in a comprehensive approach aided by digital technology. The complexity of the treatment was related to predictability regarding timing and the type of approach. The patient was referred for treatment because of congenitally missing and abnormally shaped permanent
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Serializing prosthetic rehabilitations to minimize time for patients with a maxillectomy without dentoalveolar support J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-13 Sarah Kay Youny Lee; Eleni Voltidi; Chad Rasmussen; Olivia Muller
An oral prosthesis can help maintain a sense of normalcy by preserving psychosocial and physiologic function in the aftermath of a maxillary resection. Rehabilitating the resulting defect in a timely manner requires strategic choices in treatment sequencing and prosthetic design. This clinical report describes the process of fabricating a series of removable and implant-retained prostheses to minimize
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A combined conventional-digital workflow for predictable cross-arch guide plane reduction J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-13 Gregory W. Bennett; Leslie Smith
A combined conventional and digital workflow is described to print a 3-dimensional complete-arch reduction guide. This was used to prepare guide planes with cross-arch parallelism in the distal of both maxillary first molars, the mesial of both maxillary first premolars, and the distolingual of both maxillary central incisors for a patient requiring a removable partial denture to replace missing bilateral
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Evaluating the efficiency of three methods to clean and disinfect screw- and cement-retained prostheses J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-13 Lina Yin; Yibo Zhu; Huajie Yu; Lixin Qiu
Statement of problem Screw- and cement-retained prostheses (SCRPs) may be contaminated during fabrication in a dental laboratory, leading to mechanical and biological complications related to the implant treatment. Studies that explored methods to efficiently and conveniently clean and disinfect SCRPs are sparse. Purpose The purpose of this clinical study was to compare the efficiency of 3 methods
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A combined digital technique to fabricate an implant-retained auricular prosthesis for rehabilitation of hemifacial microsomia J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-13 Hossein Dashti; Hamidreza Rajati Haghi; Mohammadreza Nakhaei; Ehsan Kiamanesh
Implant-retained auricular prostheses provide an excellent treatment option with better retention and stability than a conventionally retained prosthesis. This article presents a technique for auricular reconstruction for a patient with misplaced implants. The scanning process combined the use of an intraoral scanner and a facial scanner to enhance accuracy in space management for different parts of
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Examining the adaptation of modified endocrowns prepared with CAD-CAM in maxillary and mandibular molars: A microcomputed tomography study J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-13 Can Topkara; Ali Keleş
Statement of problem Endocrowns have been reported to be successful restorations for endodontically treated molars. However, comparisons between maxillary and mandibular molars, with different pulp chamber configurations are lacking. Information on the influence of venting on the adaptation of endocrowns is also lacking. Purpose The purpose of this in vitro study was to evaluate the adaptation of endocrowns
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Use of a digitally guided triple technique for bone reduction, implant placement, and immediate interim prostheses in complete-arch implant surgery J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-10 Jing Wang; Ming Fang; He Xin; Li-Peng Liu; Shuang Qu; Ji-Hua Chen; Chu-Fan Ma
A digitally guided triple technique for bone reduction, implant placement, and immediate interim prostheses in complete-arch implant surgery is presented. This technique integrates bone reduction and implant placement information into a dual-function surgical template and introduces a digital approach to fabricating immediate interim implant-supported fixed dental prostheses with the same occlusal
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A method of transferring the subgingival contour of interim restorations to definitive restorations by using zirconia copings customized with casting wax J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-09 Hiroyuki Kibayashi; Ryota Takaoka; Makoto Morita
Establishing continuous and symmetric gingival levels is essential to achieving optimal gingival esthetics. Adjustment of the subgingival contour of the interim prosthesis is useful for managing gingival levels. This article illustrates how to accurately and predictably transfer the adjusted subgingival contour of interim restorations to the definitive restorations by using zirconia copings customized
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Frequency and type of digital procedures used for the intraoral prosthetic rehabilitation of patients with head and neck cancer: A systematic review J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-09 Carlos Moreno Soriano; Paul Castañeda Vega; Albert Estrugo Devesa; Enric Jané Salas; José López López
Statement of problem In spite of a digital workflow playing an important role in the intraoral prosthetic rehabilitation of patients with head and neck cancer, information about how it has been implemented and its clinical implications is sparse. Purpose The purpose of this systematic review was to evaluate the use of a digital workflow in the intraoral prosthetic rehabilitation of patients with head
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Fracture resistance of additive manufactured and milled implant-supported interim crowns J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-09 Nuria Martín-Ortega; Alessandro Sallorenzo; Javier Casajús; Alberto Cervera; Marta Revilla-León; Miguel Gómez-Polo
Statement of problem Interim dental prostheses can be fabricated by using subtractive or additive manufacturing technologies. However, the fracture resistance of implant-supported interim crowns fabricated by using vat-polymerization additive manufacturing methods remains unclear. Purpose The purpose of this in vitro study was to evaluate the fracture resistance of anterior and posterior screw-retained
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Light transmission and bond strength of glass fiber posts submitted to different surface treatments J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-08 Cleusa Vieira; Luciano Bachmann; Carol De Andrade Lima Chaves; Yara Teresinha Correa Silva-Sousa; Silvio Rocha Correa Da Silva; Edson Alfredo
Statement of problem Light transmitted deep into the root canal is an important parameter to increase bonding of the cement to the post and dentin. Glass fiber posts seem to be an option to increase transmitted light, but literature on the light transmittance profile and power transmission to deep canal regions is lacking. Purpose The purpose of this in vitro study was to evaluate light delivered by
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The future of maxillofacial prosthodontics in North America: Part II – A survey J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-08 Johan F. Wolfaardt; Lawrence E. Brecht; Robert M. Taft
Statement of problem Head and neck care has been transformed by the introduction of advanced digital technologies that will continue to be important change drivers for maxillofacial prosthodontics. Insight into these changes is important in answering the question of whether maxillofacial prosthodontics is appropriately prepared to contribute effectively to future multidisciplinary care of the head
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Additive effects of touch-activated polymerization and extended irradiation time on bonding of light-activated adhesives to root canal dentin J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-08 Wahyuni S. Dwiandhany; Ahmed Abdou; Antonin Tichy; Kazuhide Yonekura; Masaomi Ikeda; Keiichi Hosaka; Junji Tagami; Masatoshi Nakajima
Statement of problem The bonding of light-activated adhesives to root canal dentin with an additional touch-polymerization activator has been insufficiently examined. Purpose The purpose of this in vitro study was to investigate the effect of touch-polymerization activators and extended light-irradiation time on the microtensile bond strength (μTBS) of light-activated adhesives. Material and methods
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Effect of cementation delay on bonding of self-adhesive resin cement to yttria-stabilized tetragonal zirconia polycrystal ceramic treated with nonthermal argon plasma J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-08 Carolina Guedes Barquete; Renata Antoun Simão; Stéphanie Souza Almeida Fonseca; Alexandre Barboza Elias; José Guilherme Antunes Guimarães; Edher Zacarias Herrera; Alexandre Mello; Eduardo Moreira da Silva
Statement of problem Nonthermal argon plasma (NTAP) has been reported to improve the bond strength of resin cements to yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramics. However, the effect of the inevitable delay before cementation and after treating Y-TZP ceramics with NTAP is unclear. Purpose The purpose of this in vitro study was to investigate whether delays of 8, 12, and 24 hours
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The future of maxillofacial prosthodontics in North America: Part I—Journey to the present J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-08 Johan F. Wolfaardt; Lawrence E. Brecht; Robert M. Taft
Statement of problem Understanding how maxillofacial prosthodontists are perceiving changes in head and neck care and the impact of advanced digital technologies on maxillofacial prosthodontics is important. However, no studies could be identified that specifically addressed these subjects. Purpose The purpose of this review of selected literature was to identify issues that guided the development
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Reversal of the intrusion of a natural tooth located between two implant-supported crowns: A 7-year follow-up report J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-08 Xiaoqiang Liu; Dong Peng; Yanjun Ge; Hailan Feng
In patients with implant-supported restorations, intrusion rarely occurs in nonconnected natural teeth. This clinical report describes the intrusion of a natural tooth located between 2 implant-supported crowns after 4 months of normal function. The second premolar was intruded by 3 mm. The intrusion was completely reversed after interproximal contact adjustments, and the tooth position was stable
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Influence of coloring liquid immersion on flexural strength, Vickers hardness, and color of zirconia J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-08 Mustafa Borga Donmez; Emin Orkun Olcay; Munir Demirel
Statement of problem Zirconia is a widely used restorative material, yet its white color does not meet esthetic requirements and coloring is needed. However, the effects of different durations of coloring have not been thoroughly investigated. Purpose The purpose of this in vitro study was to evaluate the effects of coloring liquid immersion of different durations on the flexural strength, Vickers
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Clinical performance of CAD-CAM crowns provided by predoctoral students at the University of Toronto J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-07 Ahmed M. Aziz; Omar El-Mowafy; Howard C. Tenenbaum; Herenia P. Lawrence
Statement of problem The clinical success of monolithic lithium disilicate glass-ceramic (LDGC) crowns manufactured with computer-aided design and computer-aided manufacturing (CAD-CAM) technology provided by predoctoral students has not been fully investigated. Purpose The purpose of this retrospective clinical study was to evaluate the performance of laboratory-fabricated monolithic posterior LDGC
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Additively manufactured implant abutment screw-access guide to remove a cement-retained implant crown: A technique J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-07 Marta Revilla-León; Delaram Seyedeh Abaei; Adam Tittle; Amirali Zandinejad
A complete digital workflow to remove a cement-retained implant-supported crown by using an additively manufactured implant abutment screw-access guide is described. The existing cone beam computed tomography (CBCT) scan was superimposed on the digital scans of the patient, which facilitated the visualization of the implant abutment screw access and guided the design of the device. Advantages of the
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An additively manufactured intraoral scan body for aiding complete-arch intraoral implant digital scans with guided integration of 3D virtual representation J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-05 Marcelo Gabriel Pérez-Giugovaz; Meredith Mosier; Marta Revilla-León
This article describes a polymeric additively manufactured intraoral scan body that facilitates a complete-arch intraoral implant digital scan and guides the superimposition procedures between the facial and digital scans comprising the patient’s 3D virtual representation. Furthermore, this novel intraoral scan body can be modified for the patient’s specific arch dimensions, enhancing patient comfort
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Displacement and performance of abutments in narrow-diameter implants with different internal connections J. Prosthet. Dent. (IF 2.444) Pub Date : 2021-01-04 Nicholas Jacobs; Robert Seghi; William M. Johnston; Burak Yilmaz
Statement of problem Displacement of abutments into conical connection implants during screw tightening may also occur during functional loading, creating unsettling forces that may cause loss of preload. A recent conical-hexagon connection with double friction fit (conical-hexagon connection) could prevent this axial displacement. Purpose The purpose of this in vitro study was to measure the 3D axial
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Patient-reported outcome measures and clinical assessment of implant-supported overdentures and fixed prostheses in mandibular edentulous patients: A systematic review and meta-analysis J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-12-31 Guilherme Almeida Borges; Thaís Barbin; Caroline Dini; Lucianne Cople Maia; Marcela Baraúna Magno; Valentim Adelino Ricardo Barão; Marcelo Ferraz Mesquita
Statement of problem A consensus based on patients’ perceptions as to whether to use overdentures or fixed prostheses to rehabilitate mandibular edentulous arches is limited. Purpose The purpose of this systematic review and meta-analysis was to compare the patient-reported outcome measures (PROMs) and clinical outcomes associated with implant-supported overdentures and fixed prostheses in edentulous
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Effect of different ceramic materials and substructure designs on fracture resistance in anterior restorations J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-12-31 Eun-Hye Jo; Yoon-Hyuk Huh; Kyung-Ho Ko; Chan-Jin Park; Lee-Ra Cho
Statement of problem Materials have been developed to reduce the chipping of ceramic veneer and improve the esthetics of anterior ceramic veneered restorations. However, studies of the effects of material and substructure design on fracture resistance are sparse. Purpose The purpose of this in vitro study was to investigate the fracture resistance of metal-ceramic (MC), zirconia-feldspathic porcelain
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Implant and prosthetic rehabilitation of a patient with mucous membrane pemphigoid J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-12-31 Thomas Fuschetto; Kenneth S. Kurtz; Rafael A. Delgado-Ruiz
Mucous membrane pemphigoid (MMP) is an autoimmune condition characterized by subepithelial separation and deposition of autoantibodies and complement along the basement membrane zone. The disease results in the development of vesiculobullous lesions of the mucous membranes and skin. This report discusses the surgical treatment and management and the prosthetic implant rehabilitation of a patient with
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Survival of posterior fixed partial dentures with minimal tooth reduction and improved esthetics: An in vitro study J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-12-30 Rujira Pattaratiwanont; Morakot Piemjai; Franklin Garcia-Godoy
Statement of problem Different designs of posterior minimally invasive fixed partial dentures (MIFPDs) still require additional tooth preparation for guide planes, occlusal rest seats, and grooves and/or slots to increase retention and resistance forms. Whether a design with less tooth reduction can be successful is unclear. Purpose This in vitro study compared the long-term survival and retention
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A completely digital workflow for the transition from a failed dentition to interim complete-arch fixed implant-supported prostheses: A clinical report J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-12-30 William Matthew Negreiros; Adam Hamilton; German O. Gallucci
This clinical report describes a completely digital workflow for the rehabilitation of the maxillary and mandibular arches with implant-supported fixed interim prostheses. Computer-assisted implant planning was used to fabricate a multifunctional surgical template for the guided placement of transitional and endosteal dental implants. Advantages of this technique include the integration of a completely
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Custom-fabricated nasal conformers and surgical stents in the management of midfacial acid burn injuries: A clinical report J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-12-30 Kirandeep Singh; Parag Dua; Poonam Prakash; Rajamani Vijaya Kumar; Rahul Bahri
Acid burn injuries in the midfacial region cause contracture of the skin and nasal aperture, which can lead to nasal airway obstruction. Management of such complicated situations requires a multidisciplinary approach, including prosthetic intervention. This article describes a clinical treatment for fabricating a custom nasal conformer for a 28-year-old man who presented with a history of an acid burn
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Multilayer zirconia: Influence of positioning within blank and sintering conditions on the in vitro performance of 3-unit fixed partial dentures J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-12-30 Martin Rosentritt; Verena Preis; Alois Schmid; Thomas Strasser
Statement of problem Multilayer zirconia blanks comprise material layers with different optical and mechanical properties. Whether positioning within the blank, as well as variation in the sintering procedure, will lead to restorations with different properties is unclear. Purpose The purpose of this in vitro study was to test the influence of sintering procedures and positioning in a multilayer blank
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Retention force and stress distribution analysis of the cementless double crown–type implant-supported prosthesis J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-12-30 Seoung-Jin Hong; Hyeonjong Lee; Yeun-Yi Lee; Kung-Rock Kwon
Statement of problem Implant-supported fixed dental prostheses have been classified into screw-retained and cement-retained types, and each retaining type has complications. A novel retentive cementless double crown (CLD) type of the implant-supported fixed prosthesis has been developed. CLD has air pockets in the intaglio surface of the crown and does not require cement or a screw hole. However, studies
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Modification of denture teeth for improved occlusal stability of a maxillary removable complete denture opposed by a mandibular implant-supported fixed complete denture: A clinical report J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-10-29 Anhar Basunbul; Gurkan Goktug; Steven M. Morgano
Wear of artificial teeth is the most common complication associated with an implant-supported fixed complete denture (ISFCD). This wear alters the occlusal scheme, with loss of eccentric occlusal balance and vertical dimension of occlusion (VDO). This clinical report describes the fabrication of a new maxillary removable complete denture opposing an existing ISFCD with occlusal modifications. Both
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Effect of bone quality and bone loss level around internal and external connection implants: A finite element analysis study J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-10-31 Cleidiel Aparecido Araujo Lemos; Fellippo Ramos Verri; Pedro Yoshito Noritomi; Daniel Takanori Kemmoku; Victor Eduardo de Souza Batista; Ronaldo Silva Cruz; Jessica Marcela de Luna Gomes; Eduardo Piza Pellizzer
Statement of problem A consensus regarding the biomechanical effects of vertical bone loss in normal and osteoporotic bone tissue according to different implant-abutment interfaces is lacking. Purpose The purpose of this finite element analysis study was to evaluate the effect of vertical bone loss (without bone loss; with 1.5-mm bone loss; with 3-mm bone loss; and with 4.5-mm bone loss) in normal
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Biomechanical behavior of mandibular overdenture retained by two standard implants or 2 mini implants: A 3-dimensional finite element analysis J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-10-24 Pravinkumar G. Patil; Liang Lin Seow; Rashmi Uddanwadikar; Piyush D. Ukey
Statement of problem Mini implants (<3 mm in diameter) are being used as an alternative to standard implants for implant-retained mandibular overdentures; however, they may exhibit higher stresses at the crestal level. Purpose The purpose of this finite element analysis study was to evaluate the biomechanical behavior (stress distribution pattern) in the mandibular overdenture, mucosa, bone, and implants
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Evaluating the stability of extended-pour alginate impression materials by using an optical scanning and digital method J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-10-29 Davide Porrelli; Federico Berton; Alvise Camurri Piloni; Ivana Kobau; Claudio Stacchi; Roberto Di Lenarda; Roberto Rizzo
Statement of problem The dimensional stability of alginate dental impressions is a key factor for the reliability of delayed gypsum pouring and digital scanning. However, studies of the dimensional stability of alginates with conventional methods that consider the dimensional variations of large impressions are lacking. Purpose The purpose of this in vitro study was to investigate and compare 2 digital
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Rehabilitating simulated worn dentition by using a complete digital workflow and five anatomic guidelines J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-12-29 Ramtin Sadid-Zadeh; Abdullah Al Qaraghuli
This report describes the rehabilitation of worn dentition by using a complete digital workflow on a nonhinged simulated patient. A dentiform was used to represent an individual with loss of occlusal vertical dimension. Interim restorations were designed following the simulated patient's midline, interpupillary line, and ala-tragus line and a defined central incisal edge position, posterior maxillary
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Fabrication of additively manufactured custom impression copings based on stock abutments J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-12-29 Islam M. Abdel Raheem; Rahaf M. Darwish
This article describes a dental implant impression technique using custom impression copings. The implant impression coping was designed by using a dental computer-aided design software program and manufactured by using additive methods. The impression copings were cemented to stock abutments, and the assemblies were used to make the definitive pick-up impression.
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Clinical comparison between crestal and subcrestal dental implants: A systematic review and meta-analysis J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-12-25 Ronaldo Silva Cruz; Cleidiel Aparecido Araújo Lemos; Jéssica Marcela de Luna Gomes; Hiskell Francine Fernandes e Oliveira; Eduardo Piza Pellizzer; Fellippo Ramos Verri
Statement of problem How the performance of dental implants is related to their occlusogingival placement, crestal or subcrestal, is unclear. Purpose The purpose of this systematic review and meta-analysis was to evaluate marginal bone loss, implant survival rate, and peri-implant soft tissue parameters between implants placed at the crestal and subcrestal bone level. Material and methods Two independent
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Fatigue resistance of composite resins and glass-ceramics on dentin and enamel J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-12-19 Paul de Kok; Gustave F. Kanters; Cornelis J. Kleverlaan
Statement of problem Composite resins and glass-ceramics are both used to restore worn teeth. Which restoration material is more durable is unclear. Purpose The purpose of this in vitro study was to evaluate the load to failure of thin composite resins and glass-ceramic restorations on enamel and dentin under increasing repetitive loads. Material and methods Glass-ceramic blocks (IPS e.max CAD; Ivoclar
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Biomechanical analysis of the press-fit effect in a conical Morse taper implant system by using an in vitro experimental test and finite element analysis J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-12-19 Hung-Chih Chang; Chih-Han Chang; Hung-Yuan Li; Chau-Hsiang Wang
Statement of problem The press-fit (Morse taper) implant system is commonly used to restore edentulous areas. However, abutment screws in this system may be damaged because of the 2- or 3-piece design, consequently causing complications. How these damaging situations occur is unclear. Purpose The purpose of this in vitro and finite element analysis (FEA) study was to elucidate the mechanisms of the
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Interproximal contact loss between implant-supported restorations and adjacent natural teeth: A retrospective cross-sectional study of 83 restorations with an up to 10-year follow-up J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-12-17 Despoina Bompolaki; Sara A. Edmondson; James A. Katancik
Statement of problem Interproximal contact loss between implant-supported restorations and adjacent natural teeth is a frequently encountered complication that could negatively affect surrounding tissues and/or patient satisfaction with treatment. The effect of interproximal contact loss on peri-implant tissue health and patient awareness of food impaction is currently unknown. Purpose The purpose
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Effect of CAD-CAM tool deterioration on the trueness of ceramic restorations J. Prosthet. Dent. (IF 2.444) Pub Date : 2020-12-17 Khaled Q. Al Hamad; Rama B. Al Rashdan; Bashar A. Al Rashdan; Firas A. Al Quran
Statement of problem Tools will gradually deteriorate with repetitive milling. However, tool lifetime can vary depending on the type of milling machine, the hardness of the ceramic material, and the size of the restoration. Studies evaluating the effect of tool deterioration on the trueness of milled restorations are lacking. Purpose The purpose of this study was to evaluate the effect of tool deterioration
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