不同材料种植复合基牙冠与可旋顶冠螺钉松动、断裂强度及失效模式的体外比较。

IF 0.7 4区 医学 Q3 MEDICINE, GENERAL & INTERNAL
Nigerian Journal of Clinical Practice Pub Date : 2025-04-01 Epub Date: 2025-04-26 DOI:10.4103/njcp.njcp_772_23
I Çötert, M Ulusoy, A G Türk
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引用次数: 0

摘要

背景:混合基牙冠和可旋冠融合了螺钉和骨水泥保留修复体的优点,潜在地提高了修复体的整体性能。目的:比较两种不同材料制作的混合基牙冠和可拧牙冠的螺钉松动和断裂强度。方法:采用钛种植体制作单牙冠40枚,分为4组(n = 10) [SM-Ti:可旋回钛瓷冠;SM-Zr:可旋转氧化锆-瓷冠,用于氧化锆基台;AC-Ti:钛瓷基牙冠;AC-Zr:氧化锆瓷基牙冠。]试件在30 NCm的扭矩下,在5℃至55℃之间进行20秒的热循环,循环5000次。测量了去除扭矩值(RTV)。在RTV测量后,用新螺钉更换螺钉并再次扭矩。然后将试件加载至断裂状态,记录断裂强度,检测破坏模式。统计学分析方法:采用方差分析和Bonferroni检验。结果:AC-Ti组平均扭矩损失最大(%20.09±6.49),SM-Ti组平均扭矩损失最小(%9.59±8.84)。仅AC-Ti组与SM-Ti组间差异有统计学意义,其他组间差异无统计学意义。AC-Ti、AC-Zr、SM-Ti、SM-Zr组的断裂强度分别为385.84±27.68 N、313.18±39.97 N、272.69±35.03 N、156.71±19.83 N,差异均有统计学意义。失效发生在钛构件的变形中,而在氧化锆构件中观察到断裂。结论:仅AC-Ti组出现螺钉松动。其余各组之间的扭矩损失值无显著差异。钛和氧化锆材料对混合基牙冠热老化后螺钉松动无影响。此外,在评估断裂强度时,混合基牙冠比可旋入式冠具有更高的强度和耐久性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
In-Vitro Comparison of Screw Loosening, Fracture Strength and Failure Mode of Implant-Supported Hybrid-Abutment Crowns and Screwmentable Crowns Manufactured with Different Materials.

Background: Hybrid-abutment crowns and screwmentable crowns offer a fusion of the benefits from both screw and cement-retained restorations, potentially enhancing the overall performance of the restoration.

Aim: This study aimed to evaluate the screw loosening and fracture strength of hybrid-abutment crowns and screwmentable crowns made with two different materials.

Methods: Forty single-crown were made on titanium implants and divided into four groups (n = 10) [SM-Ti: Screwmentable titanium-porcelain crowns on stock titanium abutment; SM-Zr: Screwmentable zirconia-porcelain crowns on stock zirconia abutment; AC-Ti: Titanium-porcelain abutment crowns; AC-Zr: Zirconia-porcelain abutment crowns.] Specimens were torqued with 30 NCm and thermocycled between 5℃ and 55℃ in 20-second cycles for 5000 cycles. Removal torque values (RTV) were measured. Following the RTV measurement, the screws were changed with fresh screws and torqued again. Afterwards, specimens were loaded to fracture and fracture strengths were recorded, failure modes were examined.

Statistical analysis used: Analysis of variance and Bonferroni test was performed.

Results: The AC-Ti group displayed the highest mean torque loss (%20.09 ± 6.49) and the SM-Ti group displayed the lowest (%9.59 ± 8.84). Only the difference between AC-Ti and SM-Ti groups was found statistically significant, there are no significant differences between other groups. The fracture strengths are 385.84 ± 27.68 N, 313.18 ± 39.97 N, 272.69 ± 35.03 N, and 156.71 ± 19.83 N for AC-Ti, AC-Zr, SM-Ti, and SM-Zr groups, respectively and all differences were found to be statistically significant. Failures occurred as deformation in titanium components, whereas fractures were observed in zirconia components.

Conclusion: Screw loosening was observed only in the AC-Ti group. No significant difference was observed among the torque loss values in the remaining groups. Titanium and zirconia materials do not exert any influence on screw loosening after thermal aging for hybrid-abutment crowns. Moreover, when assessing fracture strength, hybrid-abutment crowns exhibit superior strength and durability compared to screwmentable crowns.

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来源期刊
Nigerian Journal of Clinical Practice
Nigerian Journal of Clinical Practice MEDICINE, GENERAL & INTERNAL-
CiteScore
1.40
自引率
0.00%
发文量
275
审稿时长
4-8 weeks
期刊介绍: The Nigerian Journal of Clinical Practice is a Monthly peer-reviewed international journal published by the Medical and Dental Consultants’ Association of Nigeria. The journal’s full text is available online at www.njcponline.com. The journal allows free access (Open Access) to its contents and permits authors to self-archive final accepted version of the articles on any OAI-compliant institutional / subject-based repository. The journal makes a token charge for submission, processing and publication of manuscripts including color reproduction of photographs.
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