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首页> 外文学位 >Torque analysis of mini-screw implants placed with and without a pilot drill: A canine study.
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Torque analysis of mini-screw implants placed with and without a pilot drill: A canine study.

机译：带有或不带有导向钻的微型螺钉植入物的扭矩分析：犬类研究。

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摘要

The objectives of this study were: (1) to compare the success rates of mini-screws placed with or without use of a pilot drill; (2) to evaluate the relationship between the success rate and the Implant Placement Torque (IPT) of mini-screws; and (3) to measure the removal torque of the mini-screws.;Results: A total of 33 mini-screws were placed. After 6 weeks of healing, the success rate for the control and test groups were 46.7% and 80%, respectively (difference not statistically significant). There was no statistically significant difference in the mean IPT values and the mean number of turns for failed and successful mini-screws. The difference between the mean IPT values at the 3rd turn during mini-screw placement in the successful and failed mini-screws (5.56 Ncm and 14.03 Ncm, respectively) was statistically significant (p0.01).;Conclusions. In the group which a pilot drill was not used, the self-drilling mini-screw had a higher success rate than in the group which a pilot drill was used. The IPT value at the 3rd turn during mini-screw placement had an impact for the success of the mini-screw.;Key words. Orthodontic anchorage; temporary anchorage devices; screw; mini-screw; dental implants; placement torque.;Methods and materials. Six American foxhounds served as subjects in this study. Three OsteoMed mini-screws (1.6 mm diameter and 8 mm length) were planned to be placed in each side of the mandible between the roots of the teeth canine/premolar 1 (PM1), PM2/PM3, and PM3/PM4. The sites were randomly allocated in: (1) control group: miniscrews placed with pilot drill and (2) test group: mini-screws placed without pilot drill (self-drilling). The implant placement torque (IPT) and the number of turns performed by the screws during placement were measured. After a healing period of 6 weeks, the miniscrews were removed and the removal torque was measured.
机译：这项研究的目的是：（1）比较使用或不使用试验钻放置的微型螺钉的成功率； （2）评估微型螺钉的成功率与植入物放置扭矩（IPT）之间的关系； （3）测量微型螺丝的拆卸扭矩。结果：总共放置了33个微型螺丝。治愈6周后，对照组和测试组的成功率分别为46.7％和80％（差异无统计学意义）。失败和成功的小螺钉的平均IPT值和平均匝数在统计学上没有显着差异。在成功和失败的微型螺钉中，微型螺钉放置期间第三轮的平均IPT值之间的差异（分别为5.56 Ncm和14.03 Ncm）具有统计学意义（p <0.01）。在不使用导向钻的组中，自钻微型螺钉的成功率要高于使用导向钻的组。微型螺钉放置期间第3圈的IPT值对微型螺钉的成功产生影响。关键词正畸锚固；临时锚固装置；拧;迷你螺丝牙植入物；放置扭矩。方法和材料。六只美国猎狗是本研究的对象。计划将三个OsteoMed微型螺钉（直径1.6毫米，长度8毫米）放置在下颌骨的每一侧，分别位于犬齿/前磨牙1（PM1），PM2 / PM3和PM3 / PM4的根之间。将这些部位随机分配到：（1）对照组：装有导向钻的微型螺钉和（2）测试组：不含导向钻的微型螺钉（自钻）。测量植入物放置扭矩（IPT）和放置期间螺钉执行的转数。在6周的愈合期后，将微螺钉卸下，并测量扭矩。

著录项

  • 作者

    Zambon, Daniela.;

  • 作者单位

    The Texas A&M University System Health Science Center.;

  • 授予单位 The Texas A&M University System Health Science Center.;
  • 学科 Health Sciences Dentistry.
  • 学位 M.S.
  • 年度 2007
  • 页码 66 p.
  • 总页数 66
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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