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首页> 外文期刊>The Journal of Prosthetic Dentistry >Effect of groove placement on the retention/resistance of resin-bonded retainers for maxillary and mandibular second molars.
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Effect of groove placement on the retention/resistance of resin-bonded retainers for maxillary and mandibular second molars.

机译：凹槽放置对上颌和下颌第二磨牙的树脂结合型保持器的保持/阻力的影响。

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STATEMENT OF PROBLEM: Lack of retention/resistance form in the clinical preparation of teeth for resin-bonded retainers may lead to clinical failure. PURPOSE: This study investigated the effect of proximal grooves on the retention/resistance of cast resin-bonded retainers for maxillary and mandibular second molar teeth. MATERIAL AND METHODS: Two ivorine teeth (a maxillary and a mandibular second molar) were prepared for resin-bonded retainers. Twenty metal replicas of the prepared teeth were made (10 for each tooth morphotype). Resin-bonded retainers 0.5 mm thick were made for the 40 replicas and luted with Panavia EX cement. Forces for dislodgment of the retainers were applied along the long axes of the teeth. Forces recorded at the time of dislodgment were analyzed with 2-way analysis of variance and the post hoc Scheffe test. RESULTS: Grooves resulted in substantial increases in debonding forces for maxillary molars (P<.001). The effect of grooves on mandibular second molars was not significant (P=.13). CONCLUSION: Grooves placed in tooth preparations of maxillary molar teeth for resin-bonded retainers had a significant effect on retention/resistance. The effect of grooves on mandibular second molars was less pronounced.
机译：问题陈述：在用于树脂粘结固定器的牙齿的临床制备中缺乏保持/阻力形式可能会导致临床失败。目的：本研究调查了近端沟槽对上颌和下颌第二磨牙的铸造树脂结合型保持器的保持/阻力的影响。材料与方法：准备两个牙质牙齿（上颌和下颌第二磨牙）以粘结树脂的固定器。制备了二十个准备好的牙齿的金属复制品（每个牙齿形态10个）。为40个复制品制作0.5毫米厚的树脂粘结的挡圈，并用Panavia EX水泥浸润。沿着牙齿的长轴施加了用于使保持架移位的力。位移时记录的力通过方差的2通分析和事后Scheffe检验进行分析。结果：沟槽导致上颌磨牙的脱粘力显着增加（P <.001）。凹槽对下颌第二磨牙的影响不显着（P = .13）。结论：在上颌磨牙的树脂制剂中放置用于树脂粘结固位体的沟槽对固位/阻力具有显着影响。凹槽对下颌第二磨牙的影响不太明显。

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