Evaluation of Marginal and Internal Fit of CAD/CAM Endocrowns with Different Cavity Tapers.

IF 2.1 4区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

International Journal of Prosthodontics Pub Date : 2023-05-01 DOI:10.11607/ijp.6877

Mohammadreza Hajimahmoudi, Sasan Rasaeipour, Mohammad Mroue, Safoura Ghodsi

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引用次数: 1

Abstract

Purpose: To evaluate the effect of cavity tapering on marginal and internal adaptation of endocrowns fabricated from two different ceramic materials.

Materials and methods: Two mandibular molar model teeth were prepared with two different cavity tapers (5 and 10 degrees). A total of 40 endocrowns (four groups of 10 each) were milled using lithium disilicate and zirconia-reinforced lithium silicate ceramics for each cavity taper. The marginal and internal adaptation of endocrowns were measured by a stereomicroscope (×30) at 18 different points. The data were statistically analyzed using independent t test (P < .05).

Results: A statistically significant difference was shown among the tested groups at 10 degrees of taper (P < .001). At 5 degrees of taper, the difference was insignificant. The greatest internal gap was observed at the pulpal floor in all tested groups.

Conclusion: All materials had clinically acceptable internal and marginal gaps; however, lithium disilicate ceramic had significantly better adaptation at 10 degrees of taper. Int J Prosthodont 2023;36:189-193. doi: 10.11607/ijp.6877.

查看原文本刊更多论文

不同腔径的CAD/CAM内冠边缘与内配合评价。

目的:评价两种不同陶瓷材料制备的牙槽锥度对内冠边缘和内部适应性的影响。材料与方法:制备两颗下颌磨牙模型，牙槽锥度分别为5度和10度。每个腔锥度采用二硅酸锂和氧化锆增强硅酸锂陶瓷，共铣削40个内冠(4组，每组10个)。通过体视显微镜(×30)在18个不同的点上测量了内冠的边缘和内部适应性。资料采用独立t检验进行统计学分析(P < 0.05)。结果:10度锥度组间差异有统计学意义(P < 0.001)。在5度锥度时，差异不显著。各试验组牙髓底内间隙最大。结论:所有材料均具有临床可接受的内间隙和边缘间隙;然而，二硅酸锂陶瓷在10度锥度下具有更好的适应能力。[J]中华口腔医学杂志[J]; 2009; 31(6): 389 - 393。doi: 10.11607 / ijp.6877。

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来源期刊

International Journal of Prosthodontics 医学-牙科与口腔外科

CiteScore

3.20

自引率

4.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Official Journal of the European Association for Osseointegration (EAO), the International College of Prosthodontists (ICP), the German Society of Prosthodontics and Dental Materials Science (DGPro), and the Italian Academy of Prosthetic Dentistry (AIOP) Prosthodontics demands a clinical research emphasis on patient- and dentist-mediated concerns in the management of oral rehabilitation needs. It is about making and implementing the best clinical decisions to enhance patients'' quality of life via applied biologic architecture - a role that far exceeds that of traditional prosthetic dentistry, with its emphasis on materials and techniques. The International Journal of Prosthodontics is dedicated to exploring and developing this conceptual shift in the role of today''s prosthodontist, clinician, and educator alike. The editorial board is composed of a distinguished team of leading international scholars.