简野瑞城-发表于第64回日本矫正齿科学会大会

Effective anterior intrusion with using ISW

Yosuke HORIUCHI, Zuisei KANNO and Kunimichi SOMA (Orthodontic Science, Graduate School, Tokyo dental and Medical University)

Improved super-elastic Ti-Ni alloy wire (ISW) has been widely in clinical practice for treatment of malocclusion in our department. ISW has some special properties such as: higher stabled super-elasticity upon intra-oral temperature changes, shock and vibration absorbance. Because of these properties, it is possible to deliver controlled light continuous orthodontic force to achieve effective tooth movement. Therefore utilizing ISW can be useful technique to achieve smooth vertical bite control regarding to open and deepbite cases. In this presentation, we focused on maxillary protrusion with deep overbite cases

Generally, correction of anterior deep overbite depends on anterior intrusion. In order to avoid root resorption caused by intrusion of anterior teeth, usually complex loop mechanics is needed. Recently, the usage of implants to improve anchorage is increasing, but surgical invasion is inevitable. To avoid complex and invasive procedures mentioned above, using ISW combined with J-hook headgear could achieve effective anterior intrusion with no clinical root resorption.

译文如下—陈彦朋医师翻译/ 余建宏医师指导

改良型超弹性钛镍合金线(ISW) (注: 商品名:LH) 在我们部门(国立东京医科齿科大学齿颚矫正科)已经广泛运用在治疗不正咬合的临床工作上。ISW具有一些特殊的性质例如:在口内温度变化下的较佳的热稳定性、震荡吸收。因为具有这些特性使得给予牙齿轻而持续的矫正力量以达到有效率的牙齿移动成为可能。因而运用ISW在开咬及深咬等需要垂直控制等病例，是十分有效的技术。此次报告我们将针对上颚前突合并深咬的病例加以探讨。

一般来说，改善前牙深咬取决于前牙的下压，为了避免下压门齿时引起牙根的吸收，通常需要复杂的线圈机制(注:以减少力量的给予)。最近利用矫正植体来增加锚定的情形增加，但是手术的侵袭性却无法避免。为了避免上述的复杂具侵袭的步骤，运用ISW合并J-hook头帽可达到有效率的前牙下压而无临床上的牙根吸收情形。