Mourshed Bilal, Al-Sabri Fuad Abdo, Qaed Nashwan Ahmed, Alaizari Nader, Al-Shamiri Hashem Motahir, Alfaqih Amal
Department of Prosthetic Dentistry, Al-Farabi College, Riyadh, Saudi Arabia.
Department of Restorative Dentistry, Al-Farabi College, Riyadh, Saudi Arabia.
Eur J Dent. 2017 Apr-Jun;11(2):216-220. doi: 10.4103/ejd.ejd_70_17.
The purpose of this study was to investigate the importance of pullout location and clasp types in two different environments to dislodge the clasp.
Mandibular test models with natural premolars and molar teeth were used to test four types of clasp (each 12) (Akers, Rest plate Akers, Half and Half, and Ring clasp) with three different pullout location for each type (ring on the rest, loop on the saddle, and wax arising from both rests) in dry and natural fresh saliva environment. Each clasp was pulled out 10 times with a crosshead speed of 10 mm/min, and the force required to withdraw each was measured.
A one-way ANOVA and Tukey test were used.
The ring on the saddle pullout location has the highest retention force while ring on the rest was the lowest. In addition, ring clasp has the highest retention force.
Clasp type and pullout location had a significant effect on the retentive force.
本研究旨在探讨在两种不同环境下，卡环拔出位置和卡环类型对卡环脱位的重要性。
使用带有天然前磨牙和磨牙的下颌测试模型，在干燥和天然新鲜唾液环境中，对四种类型的卡环（每种12个）（艾氏卡环、支托板艾氏卡环、对半卡环和环形卡环）进行测试，每种类型有三个不同的拔出位置（支托上的环、鞍基上的圈和两个支托产生的蜡）。每个卡环以10 mm/min的十字头速度拔出10次，并测量拔出每个卡环所需的力。
采用单因素方差分析和Tukey检验。
鞍基上的环拔出位置的固位力最高，而支托上的环的固位力最低。此外，环形卡环的固位力最高。
卡环类型和拔出位置对固位力有显著影响。
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