Victor Deepak, Prabhakar Ramchandra, Karthikeyan M K, Saravanan R, Vanathi P, Vikram N Raj, Reddy P Adarsh, Sudeepthi M
Senior Lecturer, Meenakshmi Ammal Dental College & Hospital , Chennai, India .
Dean, Professor and HOD, Department of Orthodontics, Thai Moogambigi Dental College & Hospital , Mogappair, Chennai-600107, India .
J Clin Diagn Res. 2014 Feb;8(2):227-32. doi: 10.7860/JCDR/2013/7801.4066. Epub 2013 Nov 22.
Three-dimensional control throughout the orthodontic treatment is essential for uncompromised results. Mini screws introduced for orthodontic anchorage has given the clinician an option of absolute three dimensional control. The purpose of this study was to compare and measure the vertical control and torque control of incisors and molar during enmass retraction with titanium microimplants and conventional molar anchorage.
Twenty patients were selected with extraction of all first premolars and bonded with 0.022″ slot MBT system. After aligning and leveling, all subjects were placed with 0.019″ X 0.025″ posted SS wire with standardized torquing curve. The 20 subjects were randomly divided into 2 groups consisting of 10 each (Group A & Group B). Group A subjects, implants were placed and Group B formed the control group. Retraction was carried out using NiTi closed coil springs. The assessment of the vertical and torque control of incisors and tipping and vertical control of molars was done by radiographic method using lateral cephalogram taken before and after retraction.
The torque control of incisors, P11 value in group A and B indicated no significant difference. The molar tip, P12 value in group A indicated that there was distal tipping of molars while the P12 in group B indicated mesial tipping. On vertical plane P21, P22 and P23 values in Group A indicated that there was intrusion of incisors and molars while value in Group B indicated extrusion of incisors and molars.
Three dimensional control is better in the implant group compared to the non implant group. Therefore the implant group definitely has citied advantages over conventional method.
在整个正畸治疗过程中进行三维控制对于获得理想的治疗效果至关重要。用于正畸支抗的微型螺钉为临床医生提供了绝对三维控制的选择。本研究的目的是比较和测量在使用钛微种植体进行整体内收时与传统磨牙支抗相比，切牙和磨牙的垂直控制及转矩控制情况。
选取20例拔除所有第一前磨牙的患者，用0.022英寸槽沟的MBT系统进行粘结。排齐整平后，所有受试者均置入具有标准化转矩曲线的0.019英寸×0.025英寸带环不锈钢丝。将20名受试者随机分为2组，每组10人（A组和B组）。A组受试者植入种植体，B组作为对照组。使用镍钛闭合曲弹簧进行内收。通过在回收前后拍摄头颅侧位片的放射学方法，对切牙的垂直和转矩控制以及磨牙的倾斜和垂直控制进行评估。
切牙的转矩控制，A组和B组的P11值显示无显著差异。磨牙倾斜，A组的P12值表明磨牙有远中倾斜，而B组的P12值表明磨牙有近中倾斜。在垂直平面上，A组的P21、P22和P23值表明切牙和磨牙有压低，而B组的值表明切牙和磨牙有伸长。
与非种植体组相比，种植体组的三维控制更好。因此，种植体组相对于传统方法确实具有明显优势。
