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International Journal of Prosthodontics

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https://www.readbyqxmd.com/read/29772035/two-step-immediate-loading-of-mandibular-overdentures-retained-by-mini-implants-a-prospective-clinical-study
#1
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
https://www.readbyqxmd.com/read/29772034/three-dimensional-analysis-of-internal-adaptations-of-crowns-cast-from-resin-patterns-fabricated-using-computer-aided-design-computer-assisted-manufacturing-technologies
#2
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)...
May 17, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29772033/passivity-of-fit-of-a-novel-prefabricated-implant-supported-mandibular-full-arch-reconstruction-a-comparative-in-vitro-study
#3
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
https://www.readbyqxmd.com/read/29772032/prevalence-of-abnormal-morphology-of-the-temporomandibular-joint-in-asymptomatic-subjects-a-retrospective-cohort-study-utilizing-cone-beam-computed-tomography
#4
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...
May 17, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29772031/stresses-in-implant-supported-fixed-complete-dentures-with-different-screw-tightening-sequences-and-torque-application-modes
#5
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
https://www.readbyqxmd.com/read/29624630/changes-in-quality-of-life-induced-by-tooth-whitening-are-moderated-by-perfectionism-a-randomized-double-blind-placebo-controlled-trial
#6
Daniela Kovacevic Pavicic, Marija Kolceg, Vlatka Lajnert, Andrej Pavlic, Martina Brumini, Stjepan Spalj
PURPOSE: To explore the influence of perfectionism on the short-term changes in satisfaction with smile esthetics and quality of life (QoL) induced by tooth whitening. MATERIALS AND METHODS: A total of 60 subjects were analyzed: 30 in the active group, in which the subject's anterior teeth were whitened with a photoactivated gel, and 30 in the placebo group. The Smile Esthetics-Related Quality of Life and Multidimensional Perfectionism Scale questionnaires were administered to all participants...
April 6, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29624629/using-intraoral-scanning-to-capture-complete-denture-impressions-tooth-positions-and-centric-relation-records
#7
Brian J Goodacre, Charles J Goodacre, Nadim Z Baba
Intraoral scanning was used to capture the soft tissue surfaces of both maxillary and mandibular edentulous ridges and the denture borders. Additionally, an intraoral scanner was used to digitize existing dentures with their tooth positions and base forms and a centric relation record obtained with a Gothic arch-tracing device. These scans provided all the required records for fabrication of computer-aided design/computer-assisted manufacturing of complete dentures.
April 6, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29624628/comparison-of-cemented-vs-screw-retained-customized-computer-aided-design-computer-assisted-manufacture-zirconia-abutments-for-esthetically-located-single-tooth-implants-a-10-year-randomized-prospective-study
#8
Leonardo Amorfini, Stefano Storelli, Daniela Mosca, Massimo Scanferla, Eugenio Romeo
PURPOSE: To compare the clinical outcomes of screw-retained vs cemented single crowns supported by customized zirconia abutments on implants. MATERIALS AND METHODS: Thirty-two patients received implant-supported (Regular Neck, Tissue-Level, Straumann AG), single-tooth restorations with customized zirconia abutments in the anterior areas. Participants were randomly assigned to the screw-retained (full-crown abutment [FCA]) group or the cemented (zirconia crown [ZrC]) group and followed up over a 10-year period...
April 6, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29624627/influence-of-iatrogenic-gaps-cement-type-and-time-on-microleakage-of-cast-posts-using-spectrophotometer-and-glucose-filtration-measurements
#9
Ebtissam M Al-Madi, Samar A Al-Saleh, Reem I Al-Khudairy, Taibah W Aba-Hussein
PURPOSE: To determine the influence of iatrogenic gaps, type of cement, and time on microleakage of cast posts using spectrophotometer and glucose filtration measurements. MATERIALS AND METHODS: Forty-eight single-rooted teeth were divided into eight groups of six teeth each. Teeth were instrumented and obturated, and a cast post was fabricated. In addition to two control groups (positive and negative), a total of six groups were prepared: In four groups, an artificial 2- to 3-mm gap was created between post and residual gutta percha (GP), and two groups were prepared with intimate contact between post and residual GP...
April 6, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29624626/effect-of-software-version-on-the-accuracy-of-an-intraoral-scanning-device
#10
Yasser Haddadi, Golnosh Bahrami, Flemming Isidor
PURPOSE: To investigate the impact of software version on the accuracy of an intraoral scanning device. MATERIALS AND METHODS: A master tooth was scanned with a high-precision optical scanner and then 10 times with a CEREC Omnicam scanner with software versions 4.4.0 and 4.4.4. Discrepancies were measured using quality control software. RESULTS: Mean deviation for 4.4.0 was 36.2 ± 35 μm and for 4.4.4 was 20.7 ± 14.2 μm (P ≤ .001). CONCLUSION: Software version has a significant impact on the accuracy of an intraoral scanner...
April 6, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29590666/effect-of-premolar-axial-wall-height-on-computer-aided-design-computer-assisted-manufacture-crown-retention
#11
Curt Martin, Ashley Harris, Nicholas DuVall, Michael Wajdowicz, Howard Wayne Roberts
PURPOSE: To evaluate the effect of premolar axial wall height on the retention of adhesive, full-coverage, computer-aided design/computer-assisted manufacture (CAD/CAM) restorations. MATERIALS AND METHODS: A total of 48 premolar teeth randomized into four groups (n = 12 per group) received all-ceramic CAD/CAM restorations with axial wall heights (AWH) of 3, 2, 1, and 0 mm and 16-degree total occlusal convergence (TOC). Specimens were restored with lithium disilicate material and cemented with self-adhesive resin cement...
March 28, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29590665/case-history-report-facilitation-of-prosthetic-rehabilitation-in-scleroderma
#12
Azam S Mostafavi, Mohammadreza HajiMahmoudi
Dental management of scleroderma patients is difficult and complicated because of compromised intraoral access. Physiotherapy may be an effective adjunctive treatment, as described in this follow-up report on a previously documented case history.
March 28, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29590664/the-role-of-portable-documentation-format-in-three-dimensional-interactive-visualization-in-maxillofacial-prosthetics
#13
Mahmoud E Elbashti, Amel M Aswehlee, Yuka I Sumita, Mariko Hattori, Hisashi Taniguchi
Although digital technology has advanced the visualization of treatment planning and rehabilitation in prosthodontics, the field of maxillofacial prosthetics is in vital need of an accessible document for exchange of interactive three-dimensional (3D) model visualization without requiring installation of any additional software. This article introduces a 3D data documentation method for effective interactive digital visualization in maxillofacial prosthetics using a portable documentation format (PDF).
March 28, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29590663/do-ultra-low-multidetector-computed-tomography-doses-and-iterative-reconstruction-techniques-affect-subjective-classification-of-bone-type-at-dental-implant-sites
#14
Asma'a A Al-Ekrish, Sara A Alfadda, Dania Tamimi, Wafa Alfaleh, Romed Hörmann, Wolfgang Puelacher, Gerlig Widmann
PURPOSE: To investigate whether ultra-low-dose multidetector computed tomography (MDCT) combined with the reconstruction techniques filtered backprojection (FBP), adaptive statistical iterative reconstruction (ASIR), or model-based iterative reconstruction (MBIR) alters the subjective classification of revised Lekholm and Zarb (LZ) bone types at prospective dental implant sites. MATERIALS AND METHODS: Three cadavers underwent a reference MDCT examination using a standard dose volume (CT dose index [CTDIvol ]: 29...
March 28, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29723327/implant-assisted-removable-partial-denture-prostheses-a-critical-review-of-selected-literature
#15
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
https://www.readbyqxmd.com/read/29723326/survival-rates-of-lithium-disilicate-single-restorations-a-retrospective-study
#16
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
https://www.readbyqxmd.com/read/29723325/maintenance-of-the-maxillomandibular-position-with-digital-workflow-in-oral-rehabilitation-a-technical-note
#17
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
https://www.readbyqxmd.com/read/29723324/relationship-between-quality-of-complete-dentures-and-user-satisfaction-at-1-and-5-years-postinsertion
#18
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
https://www.readbyqxmd.com/read/29723323/repair-success-of-two-innovative-hybrid-materials-as-a-function-of-different-surface-treatments
#19
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
https://www.readbyqxmd.com/read/29723322/in-vitro-fatigue-and-fracture-testing-of-implant-supported-anterior-ceramic-crowns
#20
Verena Preis, Michael Behr, Martin Rosentritt
PURPOSE: To evaluate the fatigue and fracture resistance of anterior implant-supported and tooth-supported crowns made of different monolithic ceramics. MATERIALS AND METHODS: Anterior crowns were fabricated of lithium disilicate or one of two zirconia ceramics and were tested as tooth-supported (reference) or as implant-supported crowns with chairside or labside (screw channel) procedures. After thermocycling and mechanical loading (TCML), crowns were loaded to fracture...
May 2018: International Journal of Prosthodontics
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