两段式氧化锆种植体的最大固位力和刚度，以及螺丝固位式整体氧化锂硅玻璃陶瓷修复体。

Ultimate force and stiffness of 2-piece zirconium dioxide implants with screw-retained monolithic lithium-disilicate reconstructions.

机构信息

Section for Digital Reconstructive Technology+Implant Dentistry [DiRecT+ID], School of Dental Medicine, University of Bern, Switzerland; Department of Reconstructive Dentistry & Gerodontology, School of Dental Medicine, University of Bern, Switzerland; Department of Reconstructive Dentistry, University Center for Dental Medicine Basel, University of Basel, Switzerland.

Institute for Surgical Technology and Biomechanics [ISTB], University of Bern, Switzerland.

出版信息

J Prosthodont Res. 2018 Apr;62(2):258-263. doi: 10.1016/j.jpor.2017.11.002. Epub 2017 Dec 15.

DOI:10.1016/j.jpor.2017.11.002

PMID:29249574

Abstract

PURPOSE

The aims were to analyze stiffness, ultimate force, and failure modes of a 2-piece zirconium dioxide (ZrO) implant system.

METHODS

Eleven 2-piece ZrO implants, each mounted with ZrO abutments plus bonded monolithic lithium disilicate (LS) restorations, were grouped for 3.3mm (A) and 4.1mm (B) diameter samples. Quasi-static load was monotonically applied under a standardized test set-up (loading configuration according to DIN ISO 14801). The ultimate force was defined as the maximum force that implants are able to carry out until fracture; stiffness was measured as the maximum slope during loading. An unpaired t-test was performed between group A and B for ultimate force and stiffness (p<0.05).

RESULTS

Force-displacement curves revealed statistically homogenous inner-group results for all samples. Failure modes showed characteristic fractures at the neck configuration of the implants independent of the diameter. Mean stiffness was 1099N/mm (±192) for group A, and significantly lower compared to group B with 1630N/mm (±274) (p<0.01); whereas mean ultimate force was 348N (±53) for group A, and significantly increased for group B with 684N (±29) (p<0.0001).

CONCLUSIONS

The examined 2-piece ZrO implant system mounted to LS-restorations seems to be a stable unit under in-vitro conditions with mechanical properties compared to loading capacity of physiological force. The metal-free implant reconstructions demonstrated high stiffness and ultimate force under quasi-static load for single tooth replacement under consideration of the dental indication of narrow and standard diameter implants.

摘要

目的

分析 2 件式氧化锆（ZrO）种植体系统的刚度、极限力和失效模式。

方法

将 11 个 2 件式 ZrO 种植体，每个种植体均安装 ZrO 基台和粘结整体式硅酸锂（LS）修复体，分为直径为 3.3mm（A）和 4.1mm（B）的两组。在标准化测试设置下（根据 DIN ISO 14801 加载配置），对种植体进行准静态加载。极限力定义为种植体能够承受的最大力，直到发生断裂；刚度则测量为加载过程中的最大斜率。对 A 组和 B 组的极限力和刚度进行了独立样本 t 检验（p<0.05）。

结果

力-位移曲线显示所有样本的内组结果在统计学上具有同质性。失效模式显示出与直径无关的种植体颈部结构特征性断裂。A 组的平均刚度为 1099N/mm（±192），显著低于 B 组的 1630N/mm（±274）（p<0.01）；而 A 组的平均极限力为 348N（±53），显著高于 B 组的 684N（±29）（p<0.0001）。