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International Journal of Prosthodontics

Jin-Hong Park, Sang-Wan Shin, Jeong-Yol Leea
PURPOSE: This study aimed to evaluate treatment outcomes of mandibular overdentures retained by two different mini-implant systems with ball attachments under a two-step immediate loading protocol. MATERIALS AND METHODS: This clinical trial investigated treatment outcomes of mandibular mini-implant overdentures in 45 edentulous patients. MDI implants (3M ESPE) and SlimLine implants (Dentium) were randomly selected for placement in the anterior mandible in each group (MDI = 21; SlimLine = 24) with a flapless surgical approach...
May 17, 2018: International Journal of Prosthodontics
Matthias Karl, Roberto Carretta, Kenji W Higuchi
PURPOSE: To quantify the strain development of a new prefabricated implant-supported mandibular full-arch reconstruction. MATERIALS AND METHODS: Five resin models reflecting edentulous mandibles were each restored with three interforaminal implants and prefabricated frameworks with a novel compensation mechanism, cast frameworks, and computer-aided design/computer-assisted manufacturing (CAD/CAM)-fabricated frameworks. Strains were recorded during superstructure fixation...
May 17, 2018: International Journal of Prosthodontics
Leonardo H Barcellos, Marina Lobato Palmeiro, Marcos M Naconecy, Tomás Geremia, André Cervieri, Rosemary S Shinkai
PURPOSE: To compare the effects of different screw-tightening sequences and torque applications on stresses in implant-supported fixed complete dentures supported by five abutments. MATERIALS AND METHODS: Strain gauges fixed to the abutments were used to test the sequences 2-4-3-1-5; 1-2-3-4-5; 3-2-4-1-5; and 2-5-4-1-3 with direct 10-Ncm torque or progressive torque (5 + 10 Ncm). Data were analyzed using analysis of variance and standardized effect size. RESULTS: No effects of tightening sequence or torque application were found except for the sequence 3-2-4-1-5 and some small to moderate effect sizes...
May 17, 2018: International Journal of Prosthodontics
Akiko Tomita, Tomoya Gonda, Toshihito Takahashi, Yoshinobu Maeda
PURPOSE: To evaluate the long-term effects of preventive measures against denture fracture using clinical surveys of denture fracture cases from 1984 and 2009. MATERIALS AND METHODS: This study included 128 patients who presented with a chief complaint of denture fracture and received denture repair treatment in 2009. The following data were collected: denture repair procedure; location of denture base fracture (with or without reinforcement); and period of denture use from insertion to repair...
July 2018: International Journal of Prosthodontics
Yuanhan Chang, Yoshinobu Maeda, Masahiro Wada, Tomoya Gonda, Kazunori Ikebe
PURPOSE: To clarify the relationship between residual ridge morphology and pressure distribution of the alveolar bone surface during dental impression procedures. MATERIALS AND METHODS: Seven experimental models of the mandibular posterior residual ridge with the same ridge morphology but different mucosa (ie, silicone material) thicknesses and bone (ie, plaster) shapes and sizes were fabricated. The pressure on the bone surface was recorded using a pressure sensor sheet...
July 2018: International Journal of Prosthodontics
Roberta Limeira Fulginiti, Márcio Lima Grossi, Ahmet Ozkomur, Dimas João Rodrigues Neto, Rosemary Sadami Arai Shinkai, Eduardo Rolim Teixeira
PURPOSE: To evaluate the influence of cobalt-chromium (Co-Cr) casting alloys' melting temperatures on the cast-to Co-Cr implant cylinders' marginal fit. MATERIALS AND METHODS: Co-Cr alloys with different melting ranges were cast into 20 Co-Cr cylinders: 10 in a high-melting temperature (HMT) group and 10 in a low-melting temperature (LMT) group. Ten cylinders were used as received as a control group. Cylinders' marginal misfit and dimensional stability were evaluated using scanning electron microscopy (×500)...
July 2018: International Journal of Prosthodontics
Anto Jose, Roshan Varghese, Nima Roohpour, Stephen Mason, Ritika Jain, Ana Gossweiler
PURPOSE: To assess the efficacy of two experimental denture adhesive gels (adhesives 1 and 2) compared to a commercially available denture adhesive cream (positive control) and no adhesive (negative control). MATERIALS AND METHODS: This was a single-center, randomized, four-treatment, examiner-blind, crossover study in participants with well-made and at least moderately well-fitting maxillary complete dentures. Incisal bite force until denture dislodgment was measured before application (baseline) and over the following 12 hours for each of the treatments...
July 2018: International Journal of Prosthodontics
Pedro Molinero-Mourelle, Silvia Canals, Miguel Gómez-Polo, Ma Fernanda Solá-Ruiz, Jaime Del Río Highsmith, Alicia Celemín Viñuela
PURPOSE: To assess the marginal fit of provisional polylactic acid (PLA) crowns obtained via three-dimensional (3D) printing using a profile projector. MATERIALS AND METHODS: A stone cast was scanned, and 15 provisional dental crowns were designed and printed in PLA using a 0.2-mm nozzle and 135-degree build angle. The marginal fit was measured at six points on each crown using a profile projector. RESULTS AND CONCLUSION: Within the limitations of this study, the marginal fit of PLA provisional restorations was clinically acceptable, and the results were comparable to those observed with polymethyl methacrylate provisional restorations...
July 2018: International Journal of Prosthodontics
Duziene Denardini Pereira, Mariana Marquezan, Márcio Lima Grossi, Hugo Mitsuo Silva Oshima
PURPOSE: To analyze the marginal adaptation of computer-aided design/computer-assisted manufactured (CAD/CAM) porcelain laminate veneers. MATERIALS AND METHODS: A total of 25 three-dimensional (3D) machine-milled laminate veneers were divided into five groups of five each according to fabrication material (E-max; Empress; Lava Ultimate; Suprinity; and Vita Mark II) and cemented in 25 prepared acrylic central incisors. Digital microscopy images (×7.5 magnification) were analyzed for gaps in the mesial/distal surfaces of the prepared tooth and in the cervical, medial, and incisal thirds...
July 2018: International Journal of Prosthodontics
Asma'a A Al-Ekrish, Gerlig Widmann, Sara A Alfadda
PURPOSE: To propose a revised Lekholm and Zarb classification that takes into account all possible combinations of compact and trabecular bone and to provide guidelines for increased reproducibility of the classification. MATERIALS AND METHODS: Three new classes were added to the previous classification. The new classes have been designated as subclasses of bone types 2 and 3, as follows: Type 2b: Thick layer of compact bone surrounding a core of medium-density trabecular bone; Type 2c: Thick layer of compact bone surrounding a core of low-density trabecular bone; and Type 3b: Thin layer of compact bone surrounding a core of medium-density trabecular bone...
July 2018: International Journal of Prosthodontics
Caroline T Nguyen, Vincent Sk Lee, Jonn Wu
Utilizing intraoral bite blocks can aid in stabilizing the mandible during radiation treatment (RT) and minimizing side effects to healthy tissues. This report describes a technique to fabricate a customized acrylic repositioning immobilization bite block that was integrated into the clinical workflow of radiation appointments with no delay in starting RT and with increased patient comfort.
July 2018: International Journal of Prosthodontics
Sebastian Hahnel, Christos Alamanos, Sibylle Schneider-Feyrer, Matthias Stöckle, Martin Rosentritt
PURPOSE: To investigate the mechanical properties and wear of nylon inserts and abutments in Locator-retained, implant-supported overdentures (L-IODs). MATERIALS AND METHODS: Clinical wear of inserts and abutments was qualitatively rated in a group of 16 patients with L-IODs. The inserts were also subjected to microscopic analysis, differential scanning calorimetry (DSC), and thermal gravimetric analysis (TGA). RESULTS: Wear was identified in almost all inserts and abutments...
July 2018: International Journal of Prosthodontics
Maria Menini, Paolo Setti, Paolo Pera, Francesco Pera, Paolo Pesce
PURPOSE: To evaluate plaque accumulation, peri-implant soft tissue inflammation, and bone resorption in patients with immediately loaded implants supporting fixed full-arch prostheses. MATERIALS AND METHODS: A convenience sample of 72 patients treated with fixed full-arch prostheses supported by four to six immediately loaded implants was selected. Bleeding on probing (BOP), Plaque Index (PI), and peri-implant bone loss were measured. The Sixth European Workshop on Periodontology definitions of mucositis and peri-implantitis were used, and collected data were analyzed using a nonparametric test (Spearman's rank correlation)...
July 2018: International Journal of Prosthodontics
Yushu Liu, Hongqiang Ye, Yong Wang, Yijao Zhao, Yuchun Sun, Yongsheng Zhou
PURPOSE: To evaluate the internal adaptations of cast crowns made from resin patterns produced using three different computer-aided design/computer-assisted manufacturing technologies. MATERIALS AND METHODS: A full-crown abutment made of zirconia was digitized using an intraoral scanner, and the design of the crown was finished on the digital model. Resin patterns were fabricated using a fused deposition modeling (FDM) 3D printer (LT group), a digital light projection (DLP) 3D printer (EV group), or a five-axis milling machine (ZT group)...
July 2018: International Journal of Prosthodontics
Thiago Azário de Holanda, Rita Cássia de Almeida, Alexandre Emídio Silva, Melissa Feres Damian, Noéli Boscato
PURPOSE: This retrospective cohort study in an asymptomatic nonpatient population evaluated the prevalence of specific morphologic changes usually associated with the presence of degenerative joint diseases (DJD) using cone beam computed tomography (CBCT) and examined the associations between DJD and age, sex, and number of teeth present. MATERIALS AND METHODS: CBCT images (268 TMJs) of 134 asymptomatic patients were studied. Patient data were obtained from clinical records, and calibrated examiners interpreted the CBCT images...
July 2018: International Journal of Prosthodontics
Renzo G Bassetti, Mario A Bassetti, Johannes Kuttenberger
PURPOSE: A critical review of selected relevant publications assessed clinical efficacy and effectiveness of implant-assisted removable partial dentures (IARPDs) with implant survival and failure rates, biologic and technical complications, and maintenance and patient satisfaction after rehabilitation as outcomes. MATERIALS AND METHODS: Screening of three databases (Medline [PubMed], Embase [OVID], and the Cochrane Library [CENTRAL]) and a manual search of related articles were performed...
May 2018: International Journal of Prosthodontics
Nicola Mobilio, Alberto Fasiol, Santo Catapano
PURPOSE: To assess the clinical performance of lithium disilicate single restorations on natural teeth. MATERIALS AND METHODS: All patients who received lithium disilicate single restorations between 2009 and 2013 at the dental clinic of the University of Ferrara were recalled for clinical evaluation. A total of 43 partial and total restorations in 17 patients were evaluated from a minimum of 36 months follow-up to a maximum of 81 months follow-up, with a mean follow-up of 51 months...
May 2018: International Journal of Prosthodontics
Zhongjie Li, Yingfeng Xia, Kai Chen, Hanchi Zhao, Yang Liu
Prosthodontic oral rehabilitation procedures are time consuming and require efforts to maintain the confirmed maxillomandibular relationship. Several occlusal registrations and impressions are needed, and cross-mounting is performed to transfer the diagnostic wax-up to master working casts. The introduction of a digital workflow protocol reduces steps in the required process, and occlusal registrations with less deformation are used. The outcome is a maintained maxillomandibular position that is accurately and conveniently transferred...
May 2018: International Journal of Prosthodontics
Marília Miranda da Conceição Araújo, Mara Rodrigues Martins, Anna Rachel Dos Santos Soares, Luísa Rodrigues de Abreu Carvalho, Viviane Elisângela Gomes, Efigênia Ferreira E Ferreira, Luís Otávio Miranda Cota, Maria Inês Barreiros Senna, Raquel Conceição Ferreira
AIMS: To evaluate the effects of complete denture (CD) quality and user satisfaction on the use of CDs provided by primary care services at 1 and 5 years postinsertion. MATERIALS AND METHODS: A random sample of 233 individuals were evaluated regarding the use of maxillary and/or mandibular CDs at 1 and 5 years after insertion; at both time points, denture quality, integrity, and user satisfaction were measured. The covariates included age, gender, marital status, years of education, family income, past use of CD, time since maxillary teeth loss, mandibular ridge height, and frequency of return visits to the dentist after receiving the prostheses...
May 2018: International Journal of Prosthodontics
Numan Tatar, Cagri Ural
PURPOSE: To evaluate surface treatments for chipping in order to avoid bonding problems between hybrid materials and composite resin and to determine the optimal surface treatment method during intraoral repair of restorations to achieve clinical success. MATERIALS AND METHODS: A total of 96 samples were prepared from computer-aided design/computer-assisted manufactured (CAD/CAM) blocks: 48 polymer-infiltrated ceramic (PIC) and 48 resin nano-ceramic (RNC). Prior to application of the surface treatments, the two test groups were each divided into four subgroups: control group; hydrofluoric acid group; hydrofluoric acid with silane group; and air-abraded with silica-coated aluminum oxide (Al2 O3 ) sand with silane group...
May 2018: International Journal of Prosthodontics
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