基台冷却对基台螺钉反向扭矩值影响的体外研究。

IF 1.7 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE
Nirosa Srimurugan-Thayanithi, Samir Abou-Ayash, Burak Yilmaz, Martin Schimmel, Urs Brägger
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引用次数: 1

摘要

目的:探讨冷却对骨水平和组织水平种植体不同基牙反向扭矩值的影响。原假设是在比较冷却和未冷却的种植体基牙时,基牙螺钉的反向扭矩值没有差异。材料与方法:骨水平种植体和组织水平种植体(Straumann,每个n = 36)放置在合成骨块中,并根据基台类型(钛基、水泥基台、螺钉保留修复基台)分为三组(每个n = 12)。所有基台螺钉均拧紧至35 Ncm扭矩。在一半的种植体中,在靠近种植体-基台连接的基台上应用干冰棒60秒,然后松开基台螺钉。剩余的种植-基牙对不进行冷却。使用数字扭矩计记录最大反向扭矩值。每个植入物重复拧紧和松开三次,包括实验组的冷却,每组产生18个反向扭矩值。采用双向方差分析(ANOVA)分析冷却方式和基台类型对测量结果的影响。采用事后t检验进行组间比较(α = 0.05)。使用Bonferroni-Holm方法对事后检验的P值进行多次检验校正。结果:零假设被否定。冷却和基台类型显著影响骨水平种植体的反向扭矩值(P = 0.004),而对组织水平种植体无显著影响(P = 0.051)。骨水平种植体的反向扭矩值在冷却后明显降低(20.31±2.55 Ncm vs 17.61±2.49 Ncm)。骨水平种植体的总体平均反向扭矩值明显高于组织水平种植体(18.96±2.84 Ncm vs 16.13±3.17 Ncm);P < 0.001)。结论:种植体基台的冷却导致骨水平种植体的反向扭矩值显著降低,因此可能被推荐作为应用移除卡套种植体部分程序之前的预处理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of Abutment Cooling on Reverse Torque Values of Abutment Screws: An In Vitro Study.

Purpose: To evaluate the effect of cooling on the reverse torque values of different abutments in bone-level and tissue-level implants. The null hypothesis was that there would be no difference in reverse torque values of abutment screws when cooled and uncooled implant abutments were compared. Materials and Methods: Bone-level and tissue-level implants (Straumann, each n = 36) were placed in synthetic bone blocks and subdivided into three groups (each n = 12) based on the abutment type (titanium base, cementable abutment, abutment for screw-retained restorations). All abutment screws were tightened to 35 Ncm torque. In half of the implants, a dry ice rod was applied on the abutments close to the implant-abutment connection for 60 seconds before untightening the abutment screw. The remaining implant-abutment pairs were not cooled. The maximum reverse torque values were recorded using a digital torque meter. The tightening and untightening procedure was repeated three times for each implant including cooling for the test groups, resulting in 18 reverse torque values per group. Two-way analysis of variance (ANOVA) was used to analyze the effect of cooling and abutment type on the measurements. Post hoc t tests were used to make group comparisons (α = .05). The P values of post hoc tests were corrected for multiple testing using the Bonferroni-Holm method. Results: The null hypothesis was rejected. Cooling and abutment type significantly affected the reverse torque values in bone-level implants (P = .004) but not in tissue-level implants (P = .051). The reverse torque values of bone-level implants significantly decreased after cooling (20.31 ± 2.55 Ncm vs 17.61 ± 2.49 Ncm). Overall mean reverse torque values were significantly higher in bone-level implants compared to tissue-level implants (18.96 ± 2.84 Ncm vs 16.13 ± 3.17 Ncm; P < .001). Conclusion: Cooling of the implant abutment led to a significant decrease in reverse torque values in bone-level implants and may therefore be recommended as a pretreatment before the application of procedures to remove a stuck implant part.

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来源期刊
CiteScore
3.30
自引率
5.00%
发文量
115
审稿时长
6 months
期刊介绍: Edited by Steven E. Eckert, DDS, MS ISSN (Print): 0882-2786 ISSN (Online): 1942-4434 This highly regarded, often-cited journal integrates clinical and scientific data to improve methods and results of oral and maxillofacial implant therapy. It presents pioneering research, technology, clinical applications, reviews of the literature, seminal studies, emerging technology, position papers, and consensus studies, as well as the many clinical and therapeutic innovations that ensue as a result of these efforts. The editorial board is composed of recognized opinion leaders in their respective areas of expertise and reflects the international reach of the journal. Under their leadership, JOMI maintains its strong scientific integrity while expanding its influence within the field of implant dentistry. JOMI’s popular regular feature "Thematic Abstract Review" presents a review of abstracts of recently published articles on a specific topical area of interest each issue.
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