Can polylactic acid be a CAD/CAM material for provisional crown restorations in terms of fit and fracture strength?

被引：26

作者：

Benli, Merve ^{[1
]}

Eker-Gumus, Beril ^{[2
]}

Kahraman, Yusuf ^{[2
]}

Huck, Olivier ^{[3
,4
]}

Ozcan, Mutlu ^{[5
]}

机构：

[1] Istanbul Univ, Fac Dent, Dept Prosthodont, Istanbul, Turkey

[2] Yildiz Tech Univ, Sci & Technol Applicat & Res Ctr, Istanbul, Turkey

[3] Fac Med, UMR 1260, INSERM, Osteoarticular & Dent Regenerat Nanomed, Strasbourg, France

[4] Univ Strasbourg, Fac Dent, Dept Periodontol, Strasbourg, France

[5] Univ Zurich, Clin Fixed & Removable Prosthodont & Dent Mat Sci, Ctr Dent & Oral Med, Dent Mat Unit, Zurich, Switzerland

来源：

DENTAL MATERIALS JOURNAL | 2021年 / 40卷 / 03期

关键词：

Poly(lactide); Polyetheretherketone; Polymethyl methacrylate; Crowns; IN-VITRO; INTERNAL FIT; ADAPTATION; ACCURACY; RESISTANCE; PLA;

D O I：

10.4012/dmj.2020-232

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

This study aimed to evaluate polylactic acid (PLA) as a provisional crown material. Lower right first molar phantom tooth was used for the fabrication of 60 crowns. Samples were divided into three groups (n=20) according to the material: Group PL (PLA), Group PM (polymethyl methacrylate), and Group PE (polyetheretherketone). Each group was investigated for internal and marginal fit, fracture strength, and fracture mode. Data were analyzed using ANOVA, chi-squared test, and Tukey's tests (p=0.05). The average marginal gap value of each group was: PE 56.00 +/- 4.67 mu m, PM 61.15 +/- 4.44 mu m, and PL 60.40 +/- 2.85 mu m (p<0.001). The average internal gap value for each group was: PE 128.90 +/- 8.39 mu m, PM 132.40 +/- 7.51 mu m, and PL 130.75 +/- 9.76 mu m (p=0.442). The average fracture strength of each group was: PE 840.90 +/- 13.23 N, PM 733.30 +/- 9.00 N, and PL 664.50 +/- 10.79 N (p<0.001). Results demonstrated that PLA may be a good option as a provisional crown material.

引用

页码：772 / 780

页数：9

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