Rinke, Sven

[["dc.bibliographiccitation.artnumber","2143906"],["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.journal","BioMed Research International"],["dc.bibliographiccitation.lastpage","8"],["dc.bibliographiccitation.volume","2018"],["dc.contributor.author","Rödiger, Matthias"],["dc.contributor.author","Schneider, Lea"],["dc.contributor.author","Rinke, Sven"],["dc.date.accessioned","2019-07-09T11:45:18Z"],["dc.date.available","2019-07-09T11:45:18Z"],["dc.date.issued","2018"],["dc.description.abstract","This study evaluated the marginal accuracy of CAD/CAM-fabricated crown copings from four different materials within the same processing route. Twenty stone replicas of a metallic master die (prepared upper premolar) were scanned and divided into two groups. Group 1 (𝑛� = 10) was used for a pilot test to determine the design parameters for best marginal accuracy. Group 2 (𝑛� = 10) was used to fabricate 10 specimens from the following materials with one identical CAD/CAM system (GAMMA 202, Wissner GmbH, Goettingen, Germany): A = commercially pure (cp) titanium, B = cobalt-chromium alloy, C = yttria-stabilized zirconia (YSZ), and D = leucite-reinforced glass-ceramics. Copings from group 2 were evaluated for the mean marginal gap size (MeanMG) and average maximum marginal gap size (AMaxMG) with a light microscope in the “as-machined” state. The effect of the material on the marginal accuracy was analyzed by multiple pairwise comparisons (Mann–Whitney, 𝑈�-test, 𝛼� = 0.05, adjusted by Bonferroni-Holmes method). MeanMG values were as follows: A: 46.92 ± 23.12 𝜇�m, B: 48.37 ± 29.72 𝜇�m, C: 68.25 ± 28.54 𝜇�m, and D: 58.73 ± 21.15 𝜇�m. The differences in the MeanMG values proved to be significant for groups A/C (𝑝� = 0.0024), A/D (𝑝� = 0.008), and B/C (𝑝� = 0.0332). AMaxMG values (A: 91.54 ± 23.39 𝜇�m, B: 96.86 ± 24.19 𝜇�m, C: 120.66 ± 32.75 𝜇�m, and D: 100.22 ± 10.83 𝜇�m) revealed no ignificant differences. The material had a significant impact on the marginal accuracy of CAD/CAM-fabricated copings."],["dc.identifier.doi","10.1155/2018/2143906"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15103"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59206"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","2314-6141"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","610"],["dc.title","Influence of Material Selection on the Marginal Accuracy of CAD/CAM-Fabricated Metal- and All-Ceramic Single Crown Copings"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","141"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","The International journal of prosthodontics"],["dc.bibliographiccitation.lastpage","8"],["dc.bibliographiccitation.volume","23"],["dc.contributor.author","Roediger, Matthias"],["dc.contributor.author","Gersdorff, Nikolaus"],["dc.contributor.author","Huels, Alfons"],["dc.contributor.author","Rinke, Sven"],["dc.date.accessioned","2019-07-10T08:13:30Z"],["dc.date.available","2019-07-10T08:13:30Z"],["dc.date.issued","2010"],["dc.description.abstract","PURPOSE: In this prospective clinical study, the performance of three- and four-unit fixed partial dentures (FPDs) with frameworks fabricated of yttria partially stabilized zirconia was determined after a mean observation period of 50 months. The study focused on the survival of the restoration (in situ criterion) and the success of the ceramic veneers (no defect). MATERIALS AND METHODS: Seventy-five patients with a maximum of two missing teeth and an antagonistic dentition were treated at the Department of Prosthodontics, University of Goettigen, with 99 posterior FPDs. Fifty-one specimens (experimental group) were veneered with an experimental ceramic suitable for titanium and zirconia frameworks (thermal expansion coefficient [TEC]: 8.5 microm/m K); 48 restorations (Ceram-S group) were veneered with a commercially available low-fusing ceramic optimized for zirconia frameworks (TEC: 9.5 microm/m K). All restorations were luted with zinc-phosphate cement. Statistical analysis was performed according to the Kaplan-Meier method; time-dependent success rates of the different types of ceramic veneers were analyzed using the log-rank test. RESULTS: Seven restorations were lost: 4 due to technical complications and 3 due to biologic complications. The overall survival rate after 48 months was 94% (Kaplan-Meier analysis). Twenty-three events required clinical intervention for restoration maintenance: 13 ceramic veneer chippings (polishing), 6 losses of retention (recementation), 3 caries lesions (filling therapy), and 1 loss of vitality (endodontic treatment). Between the two groups of veneering materials, no significant difference in the probability for success was determined (log-rank test, P=.81). CONCLUSIONS: Within a mean observation period of 4 years, sufficient survival rates for zirconia-based posterior FPDs could be verified. The main complications included fracture of the ceramic veneering material and decementation, which occurred mainly in the mandible."],["dc.identifier.pmid","20305852"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6042"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61265"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","0893-2174"],["dc.relation.orgunit","Universitätsmedizin Göttingen"],["dc.rights","Goescholar"],["dc.subject.ddc","610"],["dc.subject.mesh","Adult"],["dc.subject.mesh","Aged"],["dc.subject.mesh","Dental Restoration Failure"],["dc.subject.mesh","Denture Design"],["dc.subject.mesh","Denture, Partial, Fixed"],["dc.subject.mesh","Female"],["dc.subject.mesh","Follow-Up Studies"],["dc.subject.mesh","Humans"],["dc.subject.mesh","Male"],["dc.subject.mesh","Middle Aged"],["dc.subject.mesh","Prospective Studies"],["dc.subject.mesh","Survival Analysis"],["dc.subject.mesh","Tooth, Artificial"],["dc.subject.mesh","Treatment Outcome"],["dc.subject.mesh","Zirconium"],["dc.title","Prospective evaluation of zirconia posterior fixed partial dentures: four-year clinical results."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]