IN VITRO SURVIVAL AND FRACTURE FORCE OF LITHIUM DISILICATE HYBRID ABUTMENT CROWNS.

The International journal of prosthodontics Pub Date : 2024-09-27 DOI:10.11607/ijp.8548

Tobias Graf, Elisabeth Völler, Josef Schweiger, Michael Stimmelmayr, Jan-Frederik Güth, Kurt-Jürgen Erdelt

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Abstract

Purpose: To evaluate the behavior of hybrid abutment crowns fabricated from monolithic lithium disilicate ceramic (LDC) and to compare the influence of different in vitro artificial aging protocols.

Materials and methods: A total of 32 monolithic hybrid abutment crowns of monolithic LDC were fabricated. Of these, 24 were artificially aged using three different protocols up to a 20 year simulation (1.2 × 106, 2.4 × 106, 4.8 × 106 chewing cycles, thermocycling), a control group underwent no artificial aging (n = 8, N = 32). Load-to-failure tests were conducted for all specimens, and failure values were compared (P < .05).

Results: All specimens passed in vitro aging. Mean failure load values between 532.6 and 562.8 N were found but did neither differ significantly among the test groups nor from the control group.

Conclusions: Within the limitations of this in vitro pilot study, hybrid abutment crowns manufactured from monolithic LDC seem to offer appropriate long-lasting mechanical stability over a simulation period up to 20 years. The failure values and complication pattern seem to be independent of several aging protocols in this test set-up.

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二硅酸锂复合基台牙冠的体外存活和断裂力。

目的：评价由单片二硅酸锂陶瓷（LDC）制成的混合基牙牙冠的性能，并比较不同体外人工老化方案的影响。材料与方法：制作了32个单块LDC单块混合基牙冠。24人采用3种不同的方案进行人工老化，直至20年模拟（1.2×106、2.4×106、4.8×106咀嚼周期、热循环），一个对照组未进行人工老化（N=32，N=8）。对所有试样进行了荷载-破坏试验，并对破坏值进行了比较（p结果/结论：所有样本都通过了体外老化。平均失效载荷值在532.6和562.8 N之间，但试验组和对照组之间没有显著差异。在这项体外试验研究的限制范围内，由单片LDC制造的混合基牙牙冠似乎比模拟iod长达20年。在该测试设置中，故障值和并发症模式似乎与几个老化协议无关。

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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The International journal of prosthodontics

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