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International Journal of Prosthodontics

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https://www.readbyqxmd.com/read/29166421/wear-and-fracture-strength-of-new-ceramic-resins-for-chairside-milling
#1
Karina Zierden, Johannes Acar, Peter Rehmann, Bernd Wöstmann
PURPOSE: The purpose of this in vitro study was to evaluate wear and fracture strength of chairside-milled new ceramic resins after artificial aging in a chewing simulator. MATERIALS AND METHODS: Two ceramic resins (Lava Ultimate and Vita Enamic) and two conventional ceramics (IPS Empress CAD and Celtra Duo) were tested. For analysis of wear, baseline and follow-up scans of the specimens were made, the scans were superimposed, and the wear was calculated. To determine fracture strength, the specimens were loaded until they fractured...
November 22, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29166420/a-comparison-of-marginal-gaps-of-all-ceramic-crowns-constructed-from-scanned-impressions-and-models
#2
Raena Tabesh, James Dudley
PURPOSE: This study compared the marginal gaps of computer-aided design/computer-aided manufacture (CAD/CAM)-fabricated all-ceramic crowns constructed from scanned impressions and models and with two different occlusal reduction designs. MATERIALS AND METHODS: Two typodont mandibular first molars were prepared to receive CAD/CAM-fabricated all-ceramic crowns. Both molars were prepared to ideal crown reduction, the first with anatomical occlusal reduction (AOR) and the second with completely flat occlusal reduction (FOR)...
November 22, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29166419/combined-stereophotogrammetry-and-laser-sintered-computer-aided-milling-framework-for-an-implant-supported-mandibular-prosthesis-a-case-history-report
#3
Maria J Suarez, Iria Paisal, Veronica Rodriguez-Alonso, Carlos Lopez-Suarez
PURPOSE: This study compared the marginal gaps of computer-aided design/computer-aided manufacture (CAD/CAM)-fabricated all-ceramic crowns constructed from scanned impressions and models and with two different occlusal reduction designs. MATERIALS AND METHODS: Two typodont mandibular first molars were prepared to receive CAD/CAM-fabricated all-ceramic crowns. Both molars were prepared to ideal crown reduction, the first with anatomical occlusal reduction (AOR) and the second with completely flat occlusal reduction (FOR)...
November 22, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29166418/prosthetic-rehabilitation-of-a-patient-with-rare-and-severe-enamel-renal-syndrome
#4
Cedric Mauprivez, Jean-Francois Nguyen, Muriel de la Dure-Molla, Adrien Naveau
Dental rehabilitation of acute cases of enamel renal syndrome is challenging due to the absence of clinical reports. In the present case history report, examination of an 18-year-old patient revealed a complete lack of permanent teeth, as well as irregular and swollen bone and gingival morphology. Radiographs showed multiple impacted teeth in both arches. Creating a 1.5- to 2-cm interarch space was necessary for setting complete dentures. The ideal occlusal plane was chosen by combining two techniques (cephalometric radiograph and modification of the mandibular occlusal rim according to anatomical guidelines)...
November 22, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29166417/oral-status-and-prosthetic-treatment-needs-in-functionally-impaired-and-elderly-individuals
#5
Angelika Lantto, Robert Lundqvist, Inger Wårdh
PURPOSE: The purpose of this cross-sectional study was to describe the oral status and prosthetic treatment needs of dependent, functionally impaired individuals and dependent elderly individuals in comparison with the general population. METHODS: A total of 355 subjects, sampled from the register of increased financial support for dependent and functionally impaired individuals in the north of Sweden, were examined. The variables were number of teeth, Eichner Index, type and condition of prostheses, and treatment needs...
November 22, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29166416/limited-effect-of-cement-material-on-stress-distribution-of-a-monolithic-translucent-zirconia-crown-a-three-dimensional-finite-element-analysis
#6
Sebastian Franco-Tabares, Victoria Franke Stenport, Lars Hjalmarsson, Carina B Johansson
PURPOSE: The literature shows that the performance of densely sintered zirconia single crowns seems to be unaffected by the cement material. The purpose of this study was to evaluate the effects of various cement materials on the stress distribution in a monolithic translucent zirconia crown. MATERIALS AND METHODS: A crown-cement-dentin complex was modeled. Six cements were evaluated: zinc phosphate, glass-ionomer, resin-modified glass-ionomer, dual-cure resin, calcium aluminate-based, and a theoretical or conceptual cement with mechanical properties close to those of dentin (ie, monoblock cement)...
November 22, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29145529/volumetric-bone-measurement-around-dental-implants-using-3d-image-superimposition-a-methodological-and-clinical-pilot-study
#7
Eduardo Aydos Villarinho, André Correia, Alvaro Vigo, Nuno Viriato Ramos, Mário Augusto Pires Vaz, Rosemary Sadami Arai Shinkai
PURPOSE: This study describes the development of a methodology for using three-dimensional (3D) image superimposition to measure volumetric changes in bone level around dental implants in comparison with linear measures. MATERIALS AND METHODS: The sample was comprised of 46 dental implants of 6-mm length and 4.1-mm diameter placed in the posterior maxilla and posterior mandible in 20 patients. All implants received screw-retained single crowns. Radiographic images were taken using cone beam computed tomography (CBCT) and digital periapical radiography after implantation and after 12 and 24 months of functional loading (after crown installation)...
November 16, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29145528/auricular-prostheses-produced-by-means-of-conventional-and-digital-workflows-a-clinical-report-on-esthetic-outcomes
#8
Alexey Unkovskiy, Joern Brom, Fabian Huettig, Constanze Keutel
The utilization of additive manufacturing (AM) technology for the production of auricular prostheses has been widely acknowledged. However, few studies and case history reports have evaluated the esthetic outcomes of AM prostheses compared to those of conventionally manufactured prostheses. In this case history report, three manufacturing approaches-conventional, indirect, and direct mold preparation-were assessed for their esthetic outcomes in the same patient.
November 16, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29145527/evaluation-of-operating-time-and-patient-perception-using-conventional-impression-taking-and-intraoral-scanning-for-crown-manufacture-a-split-mouth-randomized-clinical-study
#9
Yasser Haddadi, Golnosh Bahrami, Flemming Isidor
PURPOSE: To compare operating time and patient perception of conventional impression (CI) taking and intraoral scanning (IOS) for manufacture of a tooth-supported crown. MATERIALS AND METHODS: A total of 19 patients needing indirect full-coverage restorations fitting the requirements for a split-mouth design were recruited. Each patient received two lithium disilicate crowns, one manufactured from CI taking and one from IOS. Both teeth were prepared following the manufacturers' recommendations...
November 16, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29145526/factors-affecting-the-decision-to-use-cemented-or-screw-retained-fixed-implant-supported-prostheses-a-critical-review
#10
Miguel Gómez-Polo, Rocio Ortega, Cristina Gómez-Polo, Alicia Celemin, Jaime Del Rio Highsmith
PURPOSE: This review aimed to compile and enumerate all the factors described in the literature that may affect the decision to use either cemented or screw-retained restorations and to determine the relative weights of each factor by type of retention and prosthesis. MATERIALS AND METHODS: The literature was reviewed, and the factors were classified as either determining (present in a clinical situation in which one of the retention mechanisms was clearly more suitable than the other) or conditioning (present in clinical situations in which one type of restoration was not clearly more advantageous than the other)...
November 16, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29145525/association-between-missing-posterior-teeth-and-occurrence-of-temporomandibular-joint-condylar-erosion-a-cone-beam-computed-tomography-study
#11
Felix Bertram, Linus Hupp, Dagmar Schnabl, Ansgar Rudisch, Rüdiger Emshoff
PURPOSE: To determine a possible association between asymptomatic temporomandibular joint (TMJ) condylar erosion and the number of missing posterior teeth and their location, as well as the number of dental quadrants with missing posterior teeth. MATERIALS AND METHODS: This case-control study involved 210 patients (male to female ratio = 98:112) aged 16-74 years, with 105 asymptomatic patients with TMJ condylar erosion and a control group of 105 patients without TMJ condylar erosion...
November 16, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29316570/the-randomized-shortened-dental-arch-study-tooth-loss-over-10-years
#12
Michael H Walter, Jens Dreyhaupt, Wolfgang Hannak, Stefan Wolfart, Ralph G Luthardt, Helmut Stark, Peter Pospiech, Torsten Mundt, Matthias Kern, Klaus Walter Böning, Bernd Wöstmann, Herbert Scheller, Florentine Jahn, Wilfried Reinhardt, Joerg Strub, Birgit Marré, Guido Heydecke
PURPOSE: This study aimed to compare the long-term outcomes of two different nonimplant treatments in the bilateral shortened dental arch (SDA). MATERIALS AND METHODS: In a multicenter randomized controlled clinical trial, patients with complete molar loss in one arch were assigned to one of two different nonimplant treatments. In the partial removable dental prosthesis (PRDP) group, patients were provided with a distal-extension prosthesis retained with precision attachments...
January 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29316569/prospective-evaluation-of-posterior-fixed-zirconia-dental-prostheses-10-year-clinical-results
#13
Sven Rinke, Jens Wehle, Xenia Schulz, Ralf Bürgers, Matthias Rödiger
PURPOSE: To investigate the clinical survival and success rates of conventionally luted three- and four-unit fixed dental prostheses (FDPs) with zirconia frameworks (Cercon Smart Ceramics, DeguDent) after a mean observation period of 119 ± 36 months. MATERIALS AND METHODS: A total of 75 patients were treated in the Department of Prosthodontics at the University of Goettingen, Germany, and a total of 99 posterior FDPs were inserted and luted with zinc phosphate cement...
January 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29316568/effect-of-submerged-vs-nonsubmerged-implant-placement-protocols-on-implant-failure-and-marginal-bone-loss-a-systematic-review-and-meta-analysis
#14
Ramy Moustafa Moustafa Ali, Ahmed Yaseen Alqutaibi, Amr Salah El-Din Gomaa, Mohamed Farouk Abdallah
PURPOSE: To compare prosthesis and implant failures and marginal bone loss (MBL) resulting from submerged vs nonsubmerged dental implant protocols. MATERIALS AND METHODS: Electronic and manual searches of two databases (MEDLINE [PubMed] and Cochrane) were conducted to identify randomized controlled trials (RCTs) comparing submerged to nonsubmerged dental implant protocols. Data were independently extracted by two reviewers, and meta-analyses were performed for the included RCTs...
January 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29095963/comparative-evaluation-of-a-four-implant-supported-polyetherketoneketone-framework-prosthesis-a-three-dimensional-finite-element-analysis-based-on-cone-beam-computed-tomography-and-computer-aided-design
#15
Ki-Sun Lee, Sang-Wan Shin, Sang-Pyo Lee, Jong-Eun Kim, Jee-Hwan Kim, Jeong-Yol Lee
PURPOSE: The purpose of this pilot study was to evaluate and compare polyetherketoneketone (PEKK) with different framework materials for implant-supported prostheses by means of a three-dimensional finite element analysis (3D-FEA) based on cone beam computed tomography (CBCT) and computer-aided design (CAD) data. MATERIALS AND METHODS: A geometric model that consisted of four maxillary implants supporting a prosthesis framework was constructed from CBCT and CAD data of a treated patient...
November 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29095962/preload-coefficient-of-friction-and-thread-friction-in-an-implant-abutment-screw-complex
#16
Stefan Wentaschek, Sven Tomalla, Irene Schmidtmann, Karl Martin Lehmann
PURPOSE: To examine the screw preload, coefficient of friction (COF), and tightening torque needed to overcome the thread friction of an implant-abutment-screw complex. MATERIALS AND METHODS: In a customized load frame, 25 new implant-abutment-screw complexes including uncoated titanium alloy screws were torqued and untorqued 10 times each, applying 25 Ncm. RESULTS: Mean preload values decreased significantly from 209.8 N to 129.5 N according to the number of repetitions...
November 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29084305/influence-of-attachment-height-and-shape-on-lateral-force-transmission-in-implant-overdenture-treatment
#17
Ziwei Ying, Tomoya Gonda, Yoshinobu Maeda
PURPOSE: The purpose of this preliminary study was to examine the influence of overdenture attachment height and shape on lateral force on implants and denture displacement. MATERIALS AND METHODS: A straight model was fabricated to simulate the edentulous ridge. Two strain gauges were attached to the mesial and distal surfaces of the implant in the canine area. Five types of ball attachments and three types of Locator attachments with three types of replacement male attachments were used...
November 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29084304/surface-roughness-changes-in-denture-liners-in-denture-stomatitis-patients
#18
Fernanda Valentini, Murilo Souza Luz, Noéli Boscato, Tatiana Pereira-Cenci
PURPOSE: This randomized clinical trial assessed how surface roughness (Ra) in resilient liners was affected by soft tissue health conditions and time-related aspects in patients with complete dentures. METHODS: Specimens of acrylic resin (control) and denture liners (silicone-based or acrylic resin-based) were inserted into the dentures of patients with and without denture stomatitis (n = 30). Ra was evaluated before denture insertion and after 7, 14, and 21 days of prosthesis wearing...
November 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29084303/a-numeric-analysis-of-bone-density-in-the-edentulous-interforaminal-region
#19
Patrick Tavitian, Michel Ruquet, Chloe Mensé, Emmanuel Nicolas, Olivier Hue
PURPOSE: The purpose of this study was to assess the density of interforaminal bone using quantitative computed tomography (QCT) in simulated case histories to be prescribed an All-on-Five fixed implant treatment protocol. MATERIALS AND METHODS: QCT scans from 30 edentulous patients (15 men and 15 women; mean age 63.33 ± 9.3 years) were analyzed using the Nobel Clinician software. Densities (in Hounsfield units [HU]) were recorded at the neck, middle part of the body, and apex of the lingual and buccal parts of proposed implant sites...
November 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29084302/comparison-of-masticatory-and-swallowing-functional-outcomes-in-surgically-and-prosthetically-rehabilitated-maxillectomy-patients
#20
R Sreeraj, Vinod Krishnan, Manju V, Krishnakumar Thankappan
PURPOSE: This study compared masticatory and swallowing functional outcomes in maxillectomy patients who underwent surgical and prosthetic rehabilitation or prosthetic rehabilitation only following surgical resection. MATERIALS AND METHODS: This comparative cross-sectional study involved 20 maxillectomy patients and compared their masticatory and swallowing functions following combined surgical and prosthodontic management vs an exclusively prosthodontic approach...
November 2017: International Journal of Prosthodontics
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