Trueness and marginal fit of implant-supported complete-arch fixed prosthesis frameworks made of high-performance polymers and titanium: An explorative in-vitro study

被引:18
|
作者
Abou-Ayash, Samir [1 ]
Schimmel, Martin [2 ,3 ]
Ozcan, Mutlu [4 ]
Ozcelik, Burak [5 ]
Bragger, Urs [6 ]
Yilmaz, Burak [7 ,8 ,9 ]
机构
[1] Univ Bern, Sect Digital Implant & Reconstruct Dent, Dept Reconstruct Dent & Gerodontol, Freiburgstr 7, CH-3007 Bern, Switzerland
[2] Univ Bern, Dept Reconstruct Dent & Gerodontol, Freiburgstr 7, CH-3007 Bern, Switzerland
[3] Univ Geneva, Univ Clin Dent Med, Div Gerodontol & Removable Prosthodont, Geneva, Switzerland
[4] Univ Zurich, Div Dent Biomat, Ctr Dent, Clin Reconstruct Dent, Zurich, Switzerland
[5] Baskent Univ, Fac Dent, Dept Prosthodont, Zurich, Switzerland
[6] Univ Bern, Dept Reconstruct Dent & Gerodontol, Freiburgstr 7, CH-3007 Bern, Switzerland
[7] Univ Bern, Sch Dent Med, Dept Reconstruct Dent & Gerodontol, Freiburgstr 7, CH-3007 Bern, Switzerland
[8] Univ Bern, Sch Dent Med, Dept Restorat Prevent & Pediat Dent, Freiburgstr 7, CH-3007 Bern, Switzerland
[9] Ohio State Univ, Div Restorat & Prosthet Dent, Coll Dent, Columbus, OH 43210 USA
关键词
Trueness; Marginal fit; CAD-CAM; Fit analysis; PEEK; PEKK; High-performance polymers; DENTAL PROSTHESES; DENTISTRY; CAD/CAM; PEEK; FABRICATION;
D O I
10.1016/j.jdent.2021.103784
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Purpose: To investigate the trueness and marginal fit of computer-aided design-computer-aided manufactured (CAD-CAM) complete-arch implant-supported screw-retained fixed prosthesis (CAISFP) made of polyetheretherketone (PEEK), polyetherketoneketone (PEKK) and titanium (Ti) Material and methods: A typodont model with four implants, their multiunit abutments (MUAs), and MUA scanbodies were digitized by using a laboratory scanner. The generated CAD was used to mill CAISFP frameworks in Ti, PEEK, or PEKK (each n = 10). The frameworks were digitized with an industrial light scanner to superimpose resulting standard tessellation language (STL) file with the CAD file. Deviations at five points at the abutment-framework interface of each of the four abutment sites (1:left first molar, 2:left canine, 3:right canine, 4:right first molar sites) were calculated (trueness). Marginal gaps were measured using the triple scan technique. A nonparametric repeated measures ANOVA by Brunner and Puri with factors being abutment location and material was performed to assess the mean deviations for trueness and mean marginal gaps, followed by MannWhitney or exact Wilcoxon Signed-Rank tests (alpha=.05). Results: Material type significantly affected the trueness (p<0.0001). PEEK had the lowest deviations (0.039 +/-0.01mm) followed by PEKK (0,049 +/-0.009mm), and Ti (0.074 +/-0.011mm). For marginal gaps, only abutment location's effect was significant (p = 0.003). Within PEKK, gaps at abutment 4 were significantly larger, compared with abutments 2 (p = 0.04) and 3 (p = 0.02). Conclusions: The trueness of PEEK, PEKK, and Ti frameworks was different after milled. PEEK had the highest trueness. However, the marginal fit of the frameworks was similar and smaller than 90 mu m in average. Clinical Relevance: PEEK, PEKK, and Ti complete-arch frameworks had clinically acceptable gaps and may therefore be recommended when their fit is considered. Higher trueness after milling did not result in better marginal fit.
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页数:8
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