Shaalan Omar Osama
Cairo University, Faculty of Dentistry, Conservative Dentistry Department, Egypt.
Acta Stomatol Croat. 2020 Dec;54(4):392-400. doi: 10.15644/asc54/4/6.
This study aimed to investigate the techniques of matricing used by Egyptian dentists, and evaluate the influence of these techniques on the reproduction of optimum proximal contacts for posterior proximal resin composite restorations.
An online questionnaire was developed and sent to 785 dentists via e-mail and social media platforms. The survey asked the participants about the following: the highest academic degree achieved and their experience, techniques of matricing used, brands of matricing systems used, assessment of proximal contact points, their evaluation of the contact points they reproduced, and their assessment of the restorations' emergence profiles.
A total of 415 dentists participated in the study (response rate 52.8%). 308, (74%), dentists preferred using the sectional matrix system, while 107 dentists, (26%), preferred using the circumferential matrix system. One hundred twenty-six dentists, (31%), reported that the circumferential matrix systems reproduced optimum contacts, 105 dentists, (25%), reported tight contacts and 184 dentists, (44%), reported open contacts. However, for the sectional matrix systems, the optimum contacts were reported by 279 dentists, (67%), tight contacts by 109 dentists, (26%), and open contacts by 27 dentists, (7%). There was a statistically significant difference between the sectional matrix systems and the circumferential matrix systems regarding the tightness of the proximal contact points (P<0.0001).
Egyptian dentists preferred using the sectional matrix systems. The survey indicated that optimum contact points were highly associated with the sectional matrix systems, while poor (open and tight) contacts were highly associated with the circumferential matrix systems.
本研究旨在调查埃及牙医使用的成型技术，并评估这些技术对后牙近中树脂复合材料修复体最佳邻面接触再现的影响。
设计了一份在线问卷，并通过电子邮件和社交媒体平台发送给785名牙医。该调查询问了参与者以下内容：获得的最高学历及其经验、使用的成型技术、使用的成型系统品牌、邻面接触点的评估、对他们再现的接触点的评价以及对修复体边缘外形的评估。
共有415名牙医参与了该研究（回复率52.8%）。308名（74%）牙医更喜欢使用分段成型系统，而107名牙医（26%）更喜欢使用环形成型系统。126名牙医（31%）报告称环形成型系统再现了最佳接触，105名牙医（25%）报告称接触紧密，184名牙医（44%）报告称接触开放。然而，对于分段成型系统，279名牙医（67%）报告称再现了最佳接触，109名牙医（26%）报告称接触紧密，27名牙医（7%）报告称接触开放。分段成型系统和环形成型系统在邻面接触点的紧密程度方面存在统计学显著差异（P<0.0001）。
埃及牙医更喜欢使用分段成型系统。调查表明，最佳接触点与分段成型系统高度相关，而不良（开放和紧密）接触与环形成型系统高度相关。
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