修复螺丝材料对被动和非被动种植支持式义齿关节稳定性的影响。

Influence of prosthetic screw material on joint stability in passive and non-passive implant-supported dentures.

作者信息

Spazzin Aloísio Oro, Henriques Guilherme Elias Pessanha, de Arruda Nóbilo Mauro Antônio, Consani Rafael Leonardo Xediek, Correr-Sobrinho Lourenço, Mesquita Marcelo Ferraz

机构信息

Department of Prosthodontics and Periodontics, Dental School of Piracicaba, State University of Campinas, 901 Avenue Limeira, Piracicaba, SP 13414-903, Brazil.

出版信息

Open Dent J. 2009 Dec 30;3:245-9. doi: 10.2174/1874210600903010245.

DOI:10.2174/1874210600903010245

PMID:20148135

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2819699/

Abstract

OBJECTIVES

This study evaluated the influence of prosthetic screw material on joint stability in implantsupported dentures at two levels of fit.

METHODS

Ten mandibular implant-supported dentures were fabricated. Twenty cast models were fabricated using these dentures. Four groups (n=10) were tested, according to the vertical fit of the dentures [passive and non-passive] and prosthetic screw materials [titanium (Ti) or gold (Au) alloy]. The one-screw test was performed to quantify the vertical misfits using an optic microscope. The loosening torque for the prosthetic screws was measured 24 hours after the tightening torque (10 Ncm) using a digital torque meter. Data were analyzed by two-way ANOVA and Tukey's test (alpha=0.05).

RESULTS

Overall, dentures with passive fit and Ti screws resulted in significantly higher loosening torque of the prosthetic screws (p<0.05). No significant interaction was found between fit level and screw material (p=0.199). The prosthetic screw material and fit of implant-supported dentures have an influence on screw joint stability. Ti screws presented higher joint stability than Au screws and minimum of misfit should be found clinically to improve the mechanical behavior of the screw joint.

摘要

目的

本研究评估了在两种适合度水平下，修复体螺钉材料对种植支持式义齿关节稳定性的影响。

方法

制作了10副下颌种植支持式义齿。使用这些义齿制作了20个铸型模型。根据义齿的垂直适合度[被动和非被动]以及修复体螺钉材料[钛（Ti）或金（Au）合金]，将其分为四组（n = 10）进行测试。使用光学显微镜进行单螺钉测试以量化垂直不匹配情况。在拧紧扭矩（10 Ncm）24小时后，使用数字扭矩计测量修复体螺钉的松动扭矩。数据采用双向方差分析和Tukey检验（α = 0.05）进行分析。

结果

总体而言，具有被动适合度和Ti螺钉的义齿导致修复体螺钉的松动扭矩显著更高（p < 0.05）。在适合度水平和螺钉材料之间未发现显著的相互作用（p = 0.199）。种植支持式义齿的修复体螺钉材料和适合度对螺钉关节稳定性有影响。Ti螺钉比Au螺钉具有更高的关节稳定性，并且临床上应尽量减少不匹配情况以改善螺钉关节的力学性能。