A radiographic analysis of tooth morphology following the use of a novel cyclical force device in orthodontics.
A radiographic analysis of tooth morphology following the use of a novel cyclical force device in orthodontics.
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DOI：
10.1186/1746-160x-7-14
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发表时间：
2011-08-09
影响因子：
3
通讯作者：
Kau CH
中科院分区：
文献类型：
--
作者：
Kau CH
目的是确定一种与正畸治疗结合使用的新设备是否会产生牙根吸收，这显示在一种新的锥形束计算机断层扫描生成的3D图像上。受试者被积极招募，那些第一次接受牙套的人被邀请参加。患者被分配接受一个功能正常的装置，并在六个月的研究期间每天使用该装置20分钟。在治疗开始和研究结束时对牙列进行CBCT成像。在研究期间，17名受试者中有14名受试者使用了该设备。受试者的平均年龄为20.3岁。所有牙齿的测量都是从牙弓一侧第一磨牙的近内颊根到同一牙弓另一侧第一磨牙的近内颊根。这些测量值以毫米为线性长度记录。配对t检验用于确定每个牙齿组在治疗结束时与治疗开始时的牙根长度是否存在显著差异。根长变化在0.5 mm和1 mm以上无统计学差异。与使用这种新型机器人设备治疗开始时相比，治疗结束时根长度的变化没有统计学意义。前牙根与后牙根间无明显差异。在0.5 mm以上的根长之间没有明显的临床变化。
The purpose was to determine whether or not a novel device used in conjunction with orthodontic treatment produced root resorption shown on 3D images generated from a new cone beam computerized tomography. Subjects were actively recruited and those who received braces for the first time were invited to participate. Patients were assigned to receive a functioning device and used the devices for 20 min daily for a six month study period. CBCT images were taken of the dentition at the start of treatment and at the end of the study period. 14 subjects out of a possible 17 subjects completed using the device during the study period. The mean age of the subjects was 20.3 years. Measurements of all teeth present were made from the mesial buccal roots of the first molar on one side of the dental arch to the mesial buccal roots of the first molar on the opposing side of the same arch. These measurements were recorded as linear lengths in mm. A paired t-test was used to determine if significant differences occurred for root lengths at the end of treatment compared to the start of treatment for each of the individual tooth groups. No statistical differences were noted for root length changes above 0.5 mm and 1 mm. No statistically significant findings were noted for root length change at the end of treatment compared to the start of treatment when using this novel robotic device. No significant differences were noted between roots of anterior and posterior teeth. No clinically significant changes between root lengths were noted above 0.5 mm.