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1.
Bernhart G Koob A Schmitter M Gabbert O Stober T Rammelsberg P 《Clinical oral investigations》2012,16(4):1031-1037
The objective of this retrospective study was to compare biological and technical complications of implant-supported and tooth-implant-supported double crown-retained dentures (DCRDs) with those of tooth-supported DCRDs. Sixty-three DCRDs were monitored. One study group included 16 prostheses with a combination of implants and natural teeth as double crowns (ti group), whereas in the second study group, 19 dentures were retained exclusively on implants (ii group); a third study group with 28 exclusively tooth-supported dentures served as controls (tt group). Tooth loss, implant failure, and technical complications (loss of retention of primary crown, abutment screw loosening, loss of facing, fracture of resin denture teeth and fracture of saddle resin) were analysed. During the observation period of 24 months, no implants or teeth were lost in the ti group and three technical complications were recorded. In the ii group, two implants were lost, two cases of peri-implantitis occurred and four technical complications were observed. In the tt group, two cases of tooth loss and seven technical complications were observed. At the time of the last examination, all prostheses of the ti group and the ii group were functional. Patients of these two study groups reported high satisfaction with both function and aesthetics with no significant difference between the two groups. Treatment with DCRDs showed comparable results in the three study groups. The 2-year results indicate that double crowns can be recommended for implant and combined tooth-implant-retained dentures. 相似文献
2.
Bianchini MA Souza JG Souza DC Magini RS Benfatti CA Cardoso AC 《Acta odontológica latinoamericana : AOL》2011,24(1):21-28
The aim of this study was to evaluate the fit between dental abutments and the metal framework of a 3-unit fixed prosthesis screwed to two implants to determine whether sectioning and soldering of the framework are in fact necessary procedures. The study was based on a model of a metal framework of a 3-unit prosthesis screwed to two implants. A total of 18 metal frameworks were constructed and divided into 3 groups: (1) NS group - each framework was cast in one piece and not sectioned; (2) CS group - the components of each sectioned framework were joined by conventional soldering; and (3) LW group - the components of each sectioned framework were joined by laser welding. The control group consisted of six silver-palladium alloy copings that were not cast together. Two analyses were mperformed: in the first analysis, the framework was screwed only to the first abutment, and in the second analysis, the framework was screwed to both abutments. The prosthetic fit was assessed at a single point using a measuring microscope (Measurescope, Nikon, Japan) and the marginal gap was measured in micrometers. Statistical analysis was performed using analysis of variance (ANOVA), Scheffe's test, Student's t-test, and Mann-Whitney U test. The NS group had larger marginal gaps than the other groups (p<0.01), while the CS and LW groups had a similar degree of misfit with no significant difference between them. The results revealed that, in the case of short-span 3-unit fixed prostheses, the framework should be sectioned and soldered or welded to prevent or reduce marginal gaps between the metal framework and dental abutments. 相似文献
3.
PJ Moynihan A Elfeky JS Ellis CJ Seal RM Hyland JM Thomason 《Journal of dentistry》2012,40(10):843-850
Edentulous persons have poor diet quality demonstrating a need for dietary intervention. Implant-supported mandibular overdentures (IODs) have functional advantages over conventional dentures (CD), but whether they enhance the ability to eat more healthily following dietary advice is unknown. 相似文献
4.
Bartlett D 《Journal of dentistry》2007,35(10):768-772
AIM: This review critically appraises the literature on implant-supported restorations. METHOD: The review was conducted in March 2007 using OVID Medline with the search terms, limited to the English Language, of implant, crown, bridge, fixed and removable partial dentures and complete dentures. From a total of 5135 papers combining implants and implant-supported restorations only 131 were found, after a thorough hand search, to be relevant to the restoration of implants. RESULTS: The outcome of implant fixtures have consistently been shown to be successful over the long-term. However, the same focus of research into the restorations used to support implants has not. Where research is available to guide clinicians towards a particular technique the rigour of the research is limited. CONCLUSION: More emphasis by the research community on the outcome of restorations supported by implants is needed. 相似文献
5.
Nilsson Sheida Stenport Victoria Franke Nilsson Marco Göthberg Catharina 《Clinical oral investigations》2022,26(10):6097-6103
Clinical Oral Investigations - The aim of this retrospective study was to evaluate the clinical outcome of fixed tooth- and implant-supported protheses manufactured in porcelain veneered... 相似文献
6.
Fernanda de Cássia Papaiz Gonçalves Marina Amaral Alexandre Luiz Souto Borges Luiz Fernando Martins Gonçalves Tarcisio José de Arruda Paes-Junior 《The Journal of prosthetic dentistry》2018,119(4):606-610
Statement of problem
Complete-arch implant-supported prostheses without a framework have a high risk of failure: a straightforward and inexpensive reinforcement material, such as nylon mesh, could improve their longevity.Purpose
The purpose of this in vitro study was to evaluate a nylon-silica mesh compound on the fracture strength of acrylic resin and the fracture load of complete-arch implant-supported prostheses.Material and methods
Twenty-four complete mandibular arch implant-supported prostheses were divided into 2 groups according to cantilever length (molar and premolar) and subdivided into another 2 subgroups according to the presence or absence of reinforcing mesh. The specimens were submitted to a maximum load-to-fracture test in a universal testing machine, with a 100-N load cell, a 2 mm/min crosshead speed, and a spherical metal tip diameter of 4 mm at different points (molar and premolar). These were submitted to 1-way analysis of variance for repeated measurement and the post hoc Tukey multiple comparison test (α=.05).Results
The mean maximum load ±standard deviation for the molar group was 393.4 ±95.0 N with reinforcement and 305.4 ±76.3 N without reinforcement (P=.02); and for the premolar group was 1083.3 ±283.7 N with reinforcement and 605.3 ±90.5 N without reinforcement (P=.001).Conclusions
Reinforcement with nylon mesh increased the mean maximum load of implant-supported complete-arch prostheses at both cantilever lengths. The cantilever to the premolar (5 mm) presented the highest maximum load values to fracture. 相似文献7.
Krysta Sellers John M. Powers Sudarat Kiat-amnuay 《The Journal of prosthetic dentistry》2017,117(2):247-252
Statement of problem
The optimal retention of implant-supported ceramic crowns on zirconia abutments is a goal of prosthodontic treatment.Purpose
The purpose of this in vitro study was to evaluate the retentive strength of implant-supported IPS e.max CAD-CAM (e.max) crowns bonded to custom zirconia implant abutments with different cements.Material and methods
An optical scan of a zirconia custom abutment and a complete-coverage modified crown was designed using an intraoral E4D scanner. One hundred twenty lithium disilicate crowns (IPS e.max CAD) were cemented to 120 zirconia abutment replicas with 1 of 6 cements: Panavia 21 (P21), Multilink Hybrid Abutment (MHA), RelyX Unicem 2 (RXU), RelyX Luting Plus (RLP), Ketac Cem (KC), and Premier Implant (PI). The specimens were stored at 37°C in 100% humidity for 24 hours. Half of the specimens were thermocycled for 500 cycles. The retentive force was measured using a pull-out test with a universal testing machine. Mean retentive strengths (MRS) were calculated using 2-way ANOVA and the Tukey-Kramer test (α=.05).Results
The MRS (MPa) after 24-hour storage were P21 (3.1), MHA (2.5), RXU (2.5), RLP (1.3), KC (0.9), and PI (0.5). The MRS after thermocycling were MHA (2.5), P21 (2.2), RLP (1.8), KC (1.4), RXU (1.1), and PI (0.3). P21 had the highest MRS after 24-hour storage (P<.001), but after thermocycling MHA had the highest MRS (P<.001). RXU showed a significant decrease in MRS after thermocycling (P<.05). Cement residue was mostly retained on the zirconia abutments for P21, while for the other cements’ residue was retained on the lithium disilicate crowns.Conclusions
The cements tested presented a range of retentive strengths, providing the clinician with a choice of more or less retentive cements. MHA was the most retentive cement after thermocycling. Thermocycling significantly affected the retentive strengths of the P21 and RXU cements. 相似文献8.
Hosman HJ Viersen PT de Koomen HA van Drie HJ Folmer T Grevers A 《Nederlands tijdschrift voor tandheelkunde》1993,100(4):214-216
The Br?nemark system for implant supported bridges has been carried out in Amsterdam since 1982. One hundred patients with a maxillary conventional full denture and a mandibular fixed tissue-integrated prosthesis were selected for this study. Before and long after the treatment, questionnaires were sent to these patients in order to gain information of their experiences. The treatment had greatly benefitted the patients, in spite of the problem of the loose lower denture in some cases was shifted to the upper jaw. 相似文献
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10.
Brandt Silvia Brandt Jan Ketabi Ali-Reza Lauer Hans-Christoph Kunzmann Anna 《Clinical oral investigations》2019,23(2):763-770
Clinical Oral Investigations - Implant-supported overdentures are an established dental treatment mode. The aim of this prospective study was and interindividual comparison of patient satisfaction... 相似文献
11.
刘峰 《中华口腔医学杂志》2008,44(1):444-446
进行个别前牙或前牙列部分修复时,医师不仅要注意颜色设计的问题,最终还需要将邻近修复体的天然牙颜色精确复制于修复体上.色彩的复制包括色彩的定位、色彩的表达、色彩的再现3个步骤. 相似文献
12.
刘峰 《中华口腔医学杂志》2009,44(1):444-446
进行个别前牙或前牙列部分修复时,医师不仅要注意颜色设计的问题,最终还需要将邻近修复体的天然牙颜色精确复制于修复体上.色彩的复制包括色彩的定位、色彩的表达、色彩的再现3个步骤. 相似文献
13.
刘峰 《中华口腔医学杂志》2004,44(1):444-446
进行个别前牙或前牙列部分修复时,医师不仅要注意颜色设计的问题,最终还需要将邻近修复体的天然牙颜色精确复制于修复体上.色彩的复制包括色彩的定位、色彩的表达、色彩的再现3个步骤. 相似文献
14.
刘峰 《中华口腔医学杂志》2002,44(1):444-446
进行个别前牙或前牙列部分修复时,医师不仅要注意颜色设计的问题,最终还需要将邻近修复体的天然牙颜色精确复制于修复体上.色彩的复制包括色彩的定位、色彩的表达、色彩的再现3个步骤. 相似文献
15.
刘峰 《中华口腔医学杂志》2006,44(1):444-446
进行个别前牙或前牙列部分修复时,医师不仅要注意颜色设计的问题,最终还需要将邻近修复体的天然牙颜色精确复制于修复体上.色彩的复制包括色彩的定位、色彩的表达、色彩的再现3个步骤. 相似文献
16.
刘峰 《中华口腔医学杂志》2005,44(1):444-446
进行个别前牙或前牙列部分修复时,医师不仅要注意颜色设计的问题,最终还需要将邻近修复体的天然牙颜色精确复制于修复体上.色彩的复制包括色彩的定位、色彩的表达、色彩的再现3个步骤. 相似文献
17.
刘峰 《中华口腔医学杂志》2003,44(1):444-446
进行个别前牙或前牙列部分修复时,医师不仅要注意颜色设计的问题,最终还需要将邻近修复体的天然牙颜色精确复制于修复体上.色彩的复制包括色彩的定位、色彩的表达、色彩的再现3个步骤. 相似文献
18.
刘峰 《中华口腔医学杂志》2000,44(1):444-446
进行个别前牙或前牙列部分修复时,医师不仅要注意颜色设计的问题,最终还需要将邻近修复体的天然牙颜色精确复制于修复体上.色彩的复制包括色彩的定位、色彩的表达、色彩的再现3个步骤. 相似文献
19.
刘峰 《中华口腔医学杂志》2001,44(1):444-446
进行个别前牙或前牙列部分修复时,医师不仅要注意颜色设计的问题,最终还需要将邻近修复体的天然牙颜色精确复制于修复体上.色彩的复制包括色彩的定位、色彩的表达、色彩的再现3个步骤. 相似文献
20.
刘峰 《中华口腔医学杂志》2007,44(1):444-446
进行个别前牙或前牙列部分修复时,医师不仅要注意颜色设计的问题,最终还需要将邻近修复体的天然牙颜色精确复制于修复体上.色彩的复制包括色彩的定位、色彩的表达、色彩的再现3个步骤. 相似文献