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International Journal of Prosthodontics

Hongqiang Ye, Xinxin Li, Guanbo Wang, Jing Kang, Yushu Liu, Yuchun Sun, Yongsheng Zhou
PURPOSE: To investigate a computer-aided design/computer-aided manufacturing (CAD/CAM) process for producing one-piece removable partial dentures (RPDs) and to evaluate their fits in vitro. MATERIALS AND METHODS: A total of 15 one-piece RPDs were designed using dental CAD and reverse engineering software and then fabricated with polyetheretherketone (PEEK) using CAM. The gaps between RPDs and casts were measured and compared with traditional cast framework RPDs...
February 15, 2018: International Journal of Prosthodontics
Hirotaka Nishiyama, Shinpei Tanaka, Reina Nemoto, Hiroyuki Miura, Kazuyoshi Baba
PURPOSE: This study introduces a newly developed zirconia complete denture (ZrD) that incorporates a ceria-stabilized zirconia/alumina nano-composite framework fabricated with computer-aided design/computer-aided manufacture (CAD/CAM). MATERIALS AND METHODS: Twenty-nine edentulous patients received either a maxillary ZrD (n = 10) or a maxillary conventional complete denture (CD) (n = 19). Patient satisfaction was evaluated before and 12 months after prosthesis placement using the McGill Denture Satisfaction Instrument...
February 15, 2018: International Journal of Prosthodontics
Ines Kovačić, Sanja Peršić, Josip Kranjčić, Visar Disha, Ksenija Rener-Sitar, Asja Čelebić
PURPOSE: To assess short-term postoperative pain and swelling after insertion of mini dental implants (MDI) and standard-size implants (SSI) in the same patients at different times. MATERIALS AND METHODS: A convenience sample of 42 patients (22 females, 20 males; 58 to 73 years old) participated. Half of the participants received MDIs first, and the other half received SSIs first. Self-perceived pain and swelling at 1, 3, 5, 7, and 10 days postoperative were assessed using a 0-10 visual analog scale...
February 15, 2018: International Journal of Prosthodontics
Lisa Friedlander, Cauris Couvrechel, Cyril Perez, Bruno Tavernier
This report describes an innovative technique to remove post-and-core restorations. The WAM'X Super Quick post removal device permits a secure mechanical traction technique that can adapt to variable root angulations. Pivoting prongs mounted on forceps allow post removal while preserving the ferrule effect to improve resistance to fractures.
February 15, 2018: International Journal of Prosthodontics
James Dudley
PURPOSE: The aim of this study was to quantify the coronal tooth structure reductions (CTSRs) resulting from a variety of different types of crown preparations performed by undergraduate dental students in a simulation clinic teaching program. MATERIALS AND METHODS: A total of 76 students each submitted 21 different crown preparations completed on typodont teeth, which were individually weighed and analyzed in relation to whole and sectioned reference teeth to calculate the CTSR resulting from each preparation...
February 15, 2018: International Journal of Prosthodontics
Felix Bertram, Stefan Bertram, Ansgar Rudisch, Rüdiger Emshoff
PURPOSE: To compare panoramic and cone beam computed tomography (CBCT) determinations of implant-to-mandibular canal (MC) dimensions in mandibular regions posterior to the mental foramen and to investigate whether factors such as gender, age, region, and vertical dimension influence correlation between the two techniques. MATERIALS AND METHODS: A retrospective analysis was carried out in 64 consecutive adult patients (42 females, 22 males; average age 57.1 ± 13...
February 15, 2018: International Journal of Prosthodontics
Mirza Rustum Baig, Jaber Hussain Akbar, Muawia Qudeimat, Ridwaan Omar
PURPOSE: To evaluate the effects of impression material, impression tray type, and type of partial edentulism (ie, Kennedy class) on the accuracy of fit of cobalt-chromium (Co-Cr) partial removable dental prostheses (PRDP) in terms of the number of fabricated frameworks required until the attainment of adequate fit. MATERIALS AND METHODS: Electronic case documentations of 120 partially edentulous patients provided with Co-Cr PRDP treatment for one or both arches were examined...
February 15, 2018: International Journal of Prosthodontics
Ramin Atash, Antoaneta Yordanova, Sibel Cetik
PURPOSE: The aim of this study was to investigate the effect of coloring on the interfacial surface adhesion between a zirconia framework and ceramic veneer using three-point flexural bonding strength. MATERIALS AND METHODS: A total of 40 zirconia bars (Zirlux ST1; DE Healthcare) were cut and divided into two groups of 20 (Groups 1 and 2). The two groups were then further split and divided into four groups of 10 each (Groups 1a, 1b, 2a, and 2b). Groups 1a and 1b tested adhesion of uncolored zirconia and two different shades of ceramic veneer, and Groups 2a and 2b tested adhesion of zirconia colored with two different coloring liquids and one shade of ceramic veneer...
February 15, 2018: International Journal of Prosthodontics
Ahmad Al Jaghsi, Reiner Biffar, Christiane Pink, Torsten Mundt
PURPOSE: To demonstrate how data collected using the computerized planimetric method (CPM) can be analyzed by providing an example in which the amount of plaque accumulation and the efficacy of the rotating needles device (RND) in cleaning specific parts of partial removable dental prostheses (PRDPs) were estimated. MATERIALS AND METHODS: Thirty-four participants wearing a total of 41 double-crown-retained PRDPs with veneered secondary crowns were included in this study...
February 15, 2018: International Journal of Prosthodontics
Paolo Pesce, Francesco Pera, Paolo Setti, Maria Menini
PURPOSE: To evaluate the accuracy and precision of a digital scanner used to scan four implants positioned according to an immediate loading implant protocol and to assess the accuracy of an aluminum framework fabricated from a digital impression. MATERIALS AND METHODS: Five master casts reproducing different edentulous maxillae with four tilted implants were used. Four scan bodies were screwed onto the low-profile abutments, and a digital intraoral scanner was used to perform five digital impressions of each master cast...
March 2018: International Journal of Prosthodontics
Brian J Goodacre, Charles J Goodacre
The newest impression techniques use intraoral scanners to capture both the hard and soft tissues. However, with edentulous patients, the accuracy of an intraoral scanner to capture an acceptable impression for the fabrication of a complete denture needs to be evaluated. Therefore, the purpose of this report of two patient treatments is to describe a technique that used intraoral scanning to record mucosal morphology and fabricate computer-aided design/computer-assisted manufacture (CAD/CAM) complete dentures...
March 2018: International Journal of Prosthodontics
Stephanie Biscoping, Esther Ruttmann, Peter Rehmann, Bernd Wöstmann
PURPOSE: This study aimed to evaluate the possible effect of sealing materials on superstructure attachment (ie, tightening/loosening torque and implant-abutment gap) in two different implant systems. MATERIALS AND METHODS: A silicone, a chlorhexidine gel, and an industrial lubricant were tested. A 3D microscope was used for assessment of the implant-abutment gap, and the abutment screw was tightened and loosened with a digital torque screwdriver. A total of 20 implants per test group (10 BEGO Semados RI and 10 Nobel Biocare Replace Select Straight) were evaluated...
March 2018: International Journal of Prosthodontics
Claudio Stacchi, Federico Berton, Davide Porrelli, Teresa Lombardi
PURPOSE: To compare the efficacy of two systems in cleaning used healing abutments (HAs). MATERIALS AND METHODS: A total of 60 used HAs were randomized into two groups: one treated with an automatic cleaning system, and the other with conventional decontamination procedures. After sterilization and staining, the HAs were microscopically analyzed and underwent a cellular adhesion in vitro assay. RESULTS: Contaminated areas were observed with different frequencies in the two groups (3...
March 2018: International Journal of Prosthodontics
Matshediso Mothopi-Peri, C Peter Owen
PURPOSE: To compare the influence of abutment teeth guide planes and guiding surfaces on retention of a removable partial denture (RPD). MATERIALS AND METHODS: Extracted teeth embedded into a maxillary cast in the first premolar and second molar positions simulated two bounded saddles. Acrylic resin RPDs were made with no guide planes, then with guide planes, then with guiding surfaces added to directly contact the guide planes. The maximum loads on removal from the cast were recorded...
March 2018: International Journal of Prosthodontics
Mohamed Moustafa Said, Takafumi Otomaru, Ayako Kanazaki, Haruka Fujita, Hisashi Taniguchi
This case history report describes the long-term prosthodontic treatment of a patient with gnathodiaphyseal dysplasia (GDD). The patient was initially diagnosed with osteomyelitis in the maxilla in 1986, followed by osteonecrosis spread throughout the mandible. GDD was genetically diagnosed in 2006. Despite the severe alveolar bone resorption, prosthodontic treatment improved the patient's satisfaction and ability to perform essential functions. Regular prosthesis adjustments and periodic follow-up should continue to avoid future complications...
March 2018: International Journal of Prosthodontics
Hind Larabi, Sibel Cetik, Hoang Thai Ha, Ramin Atash
PURPOSE: To compare different dental bonding systems that are currently available on the market. MATERIALS AND METHODS: A total of 100 extracted, intact third molars were coated in resin, cut, and divided into 10 groups of 10 molars each. Molars were bonded to zirconia blocks with a different bonding system per group. Resistance to shear forces was tested using a universal traction machine. Samples were observed under scanning electron microscopy (SEM) to determine the type of fracture...
March 2018: International Journal of Prosthodontics
Aki Kitaoka, Ryo Akatsuka, Hiroaki Kato, Nobuhiro Yoda, Keiichi Sasaki
PURPOSE: This study aimed to prospectively evaluate the clinical performance of monolithic zirconia crowns made of yttria-stabilized tetragonal zirconia polycrystal. MATERIALS AND METHODS: A total of 26 crowns placed on premolar or molar teeth in 18 patients were evaluated at the time of crown placement and at 2 weeks, 6 months, 1 year, and 2 years after placement. RESULTS: Twenty-five crowns rated as satisfactory according to the California Dental Association quality evaluation system...
March 2018: International Journal of Prosthodontics
Junaid Malik, Jose Rodriguez, Michael Weisbloom, Haralampos Petridis
PURPOSE: To compare the accuracy (ie, precision and trueness) of full-arch impressions fabricated using either a conventional polyvinyl siloxane (PVS) material or one of two intraoral optical scanners. MATERIALS AND METHODS: Full-arch impressions of a reference model were obtained using addition silicone impression material (Aquasil Ultra; Dentsply Caulk) and two optical scanners (Trios, 3Shape, and CEREC Omnicam, Sirona). Surface matching software (Geomagic Control, 3D Systems) was used to superimpose the scans within groups to determine the mean deviations in precision and trueness (μm) between the scans, which were calculated for each group and compared statistically using one-way analysis of variance with post hoc Bonferroni (trueness) and Games-Howell (precision) tests (IBM SPSS ver 24, IBM UK)...
March 2018: International Journal of Prosthodontics
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
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
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