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International Journal of Prosthodontics

Jiawei Wang, Fangjun Teng, Hong He, Huifen Ding, Yong Li
Having multiple congenitally missing anterior teeth heavily influences the patient's countenance and pronunciation. There are few reports on the esthetic restoration of such situations with oral implants. This clinical case history report presents a multidisciplinary approach to treat a young woman with multiple congenitally missing anterior teeth using implant-supported prostheses. The treatment steps and clinical implications are discussed.
November 2016: International Journal of Prosthodontics
Ji Suk Shim, Jae Hyung Lim, Jung Hyun Shin, Jae Jun Ryu, Jeong Yol Lee, Sang Wan Shin
The most common complication of implant ball attachments is loss of retention via structural wear. Hence, parallel placement of implants was identified as a prerequisite for long-term success. In this case, although severe angulation was formed between implants due to severe alveolar bone resorption, parallel ball attachments on the implants could be fabricated using computer-aided design/computer-assisted manufacture. This procedure can be a solution when implants are placed with angulation and offers additional advantages such as long-term stability...
November 2016: International Journal of Prosthodontics
Atsushi Miwa, Hidehiro Kori, Yoshihiro Tsukiyama, Rika Kuwatsuru, Yasuyuki Matsushita, Kiyoshi Koyano
PURPOSE: The aim of this study was to examine the fit accuracy of e.max crowns by investigating marginal and internal gaps. MATERIALS AND METHODS: In experiment 1, 60 e.max computer-aided design/computer-assisted manufacture (CAD/CAM) crowns were manufactured. The crowns were fabricated using optical scanning of artificial teeth (Op group) or scanning of a plaster model following a silicone impression (M group). Cement space settings of 90, 120, and 150 μm were applied...
November 2016: International Journal of Prosthodontics
Stavros Pelekanos, Aspasia Sarafianou, Panagiotis Tsirogiannis, Phophi Kamposiora, Georgios Papavasiliou
PURPOSE: To assess clinical performance of bar-retained implant overdentures (IOs) with distally placed ERA attachments on four implants, and patient satisfaction after a follow-up period of 5 years in a convenience selection of 15 patients. MATERIALS AND METHODS: Bar-retained IOs with distally placed ERA attachments were placed and clinically monitored. Encountered complications during a 5-year follow-up period were recorded; and a modified OHIP-14 questionnaire was used to assess patient satisfaction...
November 2016: International Journal of Prosthodontics
Ludger Keilig, Helmut Stark, Christoph Bourauel
PURPOSE: To investigate the influence of framework materials with different elasticity moduli on the biomechanical performance of fixed partial dentures (FPDs). MATERIALS AND METHODS: A tooth-anchored three-unit FPD and surrounding tissues were modeled in two variants (veneered/full anatomical FPD) and loaded on the central unit. Three different framework materials (titanium, zirconia, high-performance polymer) were simulated. RESULTS: The polymer framework resulted in reduced framework stresses and increased veneering stresses...
November 2016: International Journal of Prosthodontics
Mahmoud E Elbashti, Yuka I Sumita, Mariko Hattori, Amel M Aswehlee, Hisashi Taniguchi
This case report describes the reproduction of the current obturator of a frail elderly patient using the digitization concept. A computed tomography scanner was used to scan the obturator. The virtual model was created using three-dimensional modeling software. The model was printed using a plastic with a low melting point with a fused deposition modeling technique in a three-dimensional printer and then conventionally processed. The definitive obturator was inserted and evaluated for fit, function, and esthetics and was successfully delivered at the second visit...
November 2016: International Journal of Prosthodontics
Laurens den Hartog, Gerry M Raghoebar, Kees Stellingsma, Arjan Vissink, Henny Ja Meijer
PURPOSE: The aim of this study was to compare the 5-year outcome of immediate loading with that of conventional loading for anterior single-tooth implants placed in healed sites. It was hypothesized that immediate loading is not inferior to conventional loading. MATERIALS AND METHODS: A total of 62 patients with a missing maxillary anterior tooth were included. At random, patients were treated with an implant that was restored either with a nonoccluding temporary crown within 24 hours after implant placement (immediate group) or according to a two-stage procedure after 3 months (conventional group)...
November 2016: International Journal of Prosthodontics
Youssef S Al Jabbari
This study retrieved and analyzed by scanning electron microscopy (SEM) and energy-dispersive x-ray spectroscopy (EDS) the failure of a single four-unit fixed partial denture (FPD). Low SEM magnifications revealed a smooth/featureless fracture surface, indicating brittle fracture. Higher magnifications revealed a small fatigue fracture region located on the inferior part of the connector. EDS analysis indicated that the FPD alloy was gold-based. Additionally, SEM showed segregation of small spherical particles at grain boundaries of the alloy, with high aluminum and oxygen content...
November 2016: International Journal of Prosthodontics
Rohana Ahmad, Mohamed I Abu-Hassan, Junning Chen, Qing Li, Michael V Swain
PURPOSE: The objective of this clinical study was to determine the relationship of mandibular morphology with residual ridge resorption (RRR) of implant-retained overdenture (IRO) patients. MATERIALS AND METHODS: RRR was quantified as change in bone volume over 1- and 2-year periods using cone beam computed tomography and a medical imaging program. Features of the mandibular morphology, namely the gonial angle, ramus length, ramus width, corpus length, and corpus height, were measured on three-dimensional models and correlated to the RRR...
November 2016: International Journal of Prosthodontics
Peter Rehmann, Anna Katharina Künkel, Daniel Weber, Ulrich Lotzmann, Bernd Wöstmann
PURPOSE: The aim of this study was to evaluate the improvement in mandibular complete dentures (MCD) stability using a modified neutral zone technique (MNZT). MATERIALS AND METHODS: For 21 patients who were dissatisfied with their primary MCD, MCDs were fabricated using the MNZT. RESULTS: Nearly all of the patients showed considerable improvement in oral health-related quality of life, and 85.7% of the patients stated an improvement in general denture stability and while chewing...
November 2016: International Journal of Prosthodontics
Zeynep Uzgur, Recep Uzgur, Hakan Çolak, Ertuğrul Ercan, Mehmet Dallı
PURPOSE: The aim of this study was to determine endodontic treatment needs and types of endodontic disease following fixed prosthodontic treatment 24 hours after tooth preparation, 1 week after tooth preparation, 1 month after placement, and 6 months after placement. MATERIALS AND METHODS: Study groups consisted of patients who attended a university dental hospital department of prosthodontics for fixed prosthodontic treatment from January 2011 to December 2013...
November 2016: International Journal of Prosthodontics
Mohamed Moustafa Said, Takafumi Otomaru, Yiliyaer Aimaijiang, Na Li, Hisashi Taniguchi
PURPOSE: The aim of this study was to investigate associations between objectively and subjectively measured masticatory function and oral health-related quality of life (OHRQoL) in partial maxillectomy patients wearing dentomaxillary prostheses. MATERIALS AND METHODS: A sample of 32 consecutively treated patients who had undergone a partial maxillectomy were enrolled. Masticatory function was assessed using two objective measures and one subjective measure. The objective measures were masticatory performance (MP), which was estimated by measuring the glucose extracted from gummy jelly, and food mixing ability (a*), which was assessed using color-changeable chewing gum...
November 2016: International Journal of Prosthodontics
Chan Park, Hong-So Yang, Hyun-Pil Lim, Kwi-Dug Yun, Gye-Jeong Oh, Sang-Won Park
This article describes the use of a newly invented compound stick gun to take impressions for complete denture. The border molding process involves loading the modeling compound in an electric heating device and applying an even thickness of compound on the flange of a custom tray at a proper temperature without hot water tempering. This method provides a quicker and easier border molding process alternative to conventional techniques.
November 2016: International Journal of Prosthodontics
Torsten Jemt
PURPOSE: The aim of this study was to report long-term clinical survival of single implants provided with turned and moderately rough surfaces in routine practice. MATERIALS AND METHODS: All patients consecutively treated at a specialist center with single-crown implants from 1982 to 2013 were included. For all these patients, data on implant failure and last examination at the clinic were collected, and thereafter cumulative survival rates (CSR) were calculated for patients treated in the maxilla or mandible with turned or moderately rough surfaces, respectively...
November 2016: International Journal of Prosthodontics
Jian Li, Ting Jiang, Ping Lv, Xiaoqian Fang, Zunsheng Xiao, Lu Jia
PURPOSE: The aim of this study was to evaluate the clinical performance of glass fiber-reinforced composite-based resin-bonded fixed partial dentures (GFRC-RBFPDs) as periodontal splints for periodontal support-reduced anterior partially edentulous dentition and for replacing lost teeth. MATERIALS AND METHODS: A total of 39 subjects were enrolled who required fixed restorations for lost mandibular anterior teeth where the adjacent teeth offered severely reduced periodontal support...
September 2016: International Journal of Prosthodontics
Khaled E Ahmed, John Whitters, Xiangyang Ju, S Gareth Pierce, Charles N MacLeod, Colin A Murray
PURPOSE: The aim of this study was to detail and assess the capability of a novel methodology to 3D-quantify tooth wear progression in a patient over a period of 12 months. MATERIALS AND METHODS: A calibrated stainless steel model was used to identify the accuracy of the scanning system by assessing the accuracy and precision of the contact scanner and the dimensional accuracy and stability of casts fabricated from three different types of impression materials. Thereafter, the overall accuracy of the 3D scanning system (scanner and casts) was ascertained...
September 2016: International Journal of Prosthodontics
Hee-Kyung Kim, Sung-Hun Kim, Jai-Bong Lee, Jung-Suk Han, In-Sung Yeo
Monolithic zirconia restorations increasingly have been used in dental practice in recent years and demonstrate superior mechanical performance compared with porcelain-veneered zirconia restorations. Recent advances in manufacturing technology have made possible the fabrication of translucent monolithic zirconia ceramics. This case report describes three clinical examples of monolithic zirconia fixed dental prostheses being used in the anterior and posterior regions and exhibiting acceptable esthetic results...
September 2016: International Journal of Prosthodontics
Nawal Alharbi, Reham B Osman, Daniel Wismeijer
PURPOSE: The aim of the present study was to evaluate the effect of the build angle and the support configuration (thick versus thin support) on the dimensional accuracy of 3D-printed full-coverage dental restorations. MATERIALS AND METHODS: A full-coverage dental crown was digitally designed and 3D-printed using stereolithography-additive manufacturing (SLA-AM) technology. Nine different angles were used during the build process: 90, 120, 135, 150, 180, 210, 225, 240, and 270 degrees...
September 2016: International Journal of Prosthodontics
Marie Elena Falcone, J Robert Kelly, Patchanee Rungruanganut
PURPOSE: It has long been taught that the hue of a patient can be taken from the canine and applied to other anterior teeth at a lower chroma. This concept does not appear to derive from published work. This study examined color relationships between in vivo maxillary central incisors and canines as a function of age. MATERIALS AND METHODS: The L*a*b* values and VITA Classical shades of the maxillary central incisor and canine of 62 subjects were determined using a handheld spectrophotometer...
September 2016: International Journal of Prosthodontics
Anke Podhorsky, Sven Putzier, Peter Rehmann, Philipp Streckbein, Eugen Domann, Bernd Wöstmann
The aim of this in vitro study was to evaluate the influence of two sealants (Kiero Seal, Kuss Dental, and Berutemp 500, Carl-Bechem) and a disinfectant agent (Chlorhexamed gel, GlaxoSmithKline) on bacterial colonization of the implant-abutment interface. Implants were pretreated with the substances or left without sealing before standard abutments were fixed. Half the specimens were subjected to cyclic loading, and the others were not loaded. Following 7 days of incubation in a bacterial solution, bacterial counts of the internal part of the implants were determined by real-time polymerase chain reaction...
September 2016: International Journal of Prosthodontics
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