Fracture resistance of hybrid ceramic abutments with different restoration lengths: A pilot study

IF 3.7 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Clinical Implant Dentistry and Related Research Pub Date : 2024-03-12 DOI:10.1111/cid.13322

Rani D'haese DDS, PhD, Valentin Vervack DDS, PhD, Manon Tytgat DDS, Stefan Vandeweghe DDS, PhD

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Abstract

Aim

In this pilot study, the fracture resistance of hybrid abutments with different restoration lengths was investigated.

Materials and Methods

Sixteen monolithic zirconia restorations of an upper right incisor were designed to fit a titanium base abutment. Eight central incisors had a crown length of 8 mm (T1) and the other half a length of 12 mm (T2). All crowns were cemented on the titanium base using a resin cement. After cementation, the samples were placed in a thermocycler for 5000 cycles. Fracture strength was measured using a universal test machine. Deformations and fractures of the samples were investigated.

Results

The mean fracture resistance of T1 was 515 N (SD 96 N, 339–650) and 305 N (SD 57 N, 234–408) for T2 (p < 0.001). Both groups showed deformation of the titanium base, with no significant difference between both groups (p = 0.200). A difference in fracture type (p = 0.013) was observed, with significantly more screw fractures occurring in group T1 (p = 0.026).

Conclusion

Within the limitations of this study, hybrid restorations with standard titanium base abutments can withstand forces that have been associated with chewing, irrespective of the crown length. However, the shorter crowns demonstrated more fatal fractures.

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不同修复长度的混合陶瓷基台的抗折性：一项试验研究。

目的：在这项试验性研究中，研究了不同修复体长度的混合基台的抗折性：设计了 16 个右上切牙的整体氧化锆修复体，与钛基底基台相匹配。八颗中切牙的牙冠长度为 8 毫米（T1），另一半中切牙的牙冠长度为 12 毫米（T2）。所有牙冠都使用树脂粘结剂粘结在钛基台上。粘接后，将样本放入热循环仪中进行 5000 个循环。使用万能试验机测量断裂强度。对样品的变形和断裂情况进行了调查：T1 的平均断裂抗力为 515 N（SD 96 N，339-650），T2 的平均断裂抗力为 305 N（SD 57 N，234-408）：在本研究的局限性范围内，无论牙冠长度如何，带有标准钛基台的混合修复体都能承受与咀嚼相关的力量。然而，较短的牙冠显示出更多致命的折裂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Clinical Implant Dentistry and Related Research 医学-牙科与口腔外科

CiteScore

6.00

自引率

13.90%

发文量

103

审稿时长

4-8 weeks

期刊介绍： The goal of Clinical Implant Dentistry and Related Research is to advance the scientific and technical aspects relating to dental implants and related scientific subjects. Dissemination of new and evolving information related to dental implants and the related science is the primary goal of our journal. The range of topics covered by the journals will include but be not limited to: New scientific developments relating to bone Implant surfaces and their relationship to the surrounding tissues Computer aided implant designs Computer aided prosthetic designs Immediate implant loading Immediate implant placement Materials relating to bone induction and conduction New surgical methods relating to implant placement New materials and methods relating to implant restorations Methods for determining implant stability A primary focus of the journal is publication of evidenced based articles evaluating to new dental implants, techniques and multicenter studies evaluating these treatments. In addition basic science research relating to wound healing and osseointegration will be an important focus for the journal.