Alomari Sawsan A, Alhaija Elham S Abu
Department of Preventive Dentistry, Faculty of Dentistry, Jordan University of Science and Technology, Irbid, Jordan.
Aust Orthod J. 2012 Nov;28(2):197-203.
Occlusal bite force (OBF) is reported to change during fixed appliance orthodontic treatment.
The aim of the present study was to determine bite force changes during the first 6 months of fixed appliance orthodontic treatment and to investigate the relationship between patients' subjective pain levels and recorded changes in OBF.
Forty-seven subjects (34 females, 13 males) were recruited from the Dental Teaching Centre at the Jordan University of Science and Technology. The subject's ages ranged between 18 and 26 years (average 19.0 +/- 3.36 years). Bite force was measured using a portable OBF gauge at nine time intervals (T0 - T8). At each OBF recording, subjects were asked to describe their subjective pain level using a visual analogue scale (VAS). A repeated-measures analysis of variance and a Bonferroni post-hoc comparison test were applied to determine differences at the various time intervals.
Bite force significantly reduced during the first month of orthodontic treatment and approximately 50% of pretreatment OBF was lost by the end of the first week. However, bite force recovered to pretreatment levels by the end of the sixth month. Visual analogue pain scores were higher during the first 2 weeks of treatment and were positively correlated with the OBF loss.
OBF reduced during the first month of orthodontic treatment but, with time, recovered to pretreatment levels.
据报道，在固定矫治器正畸治疗期间，咬合咬合力（OBF）会发生变化。
本研究的目的是确定固定矫治器正畸治疗前6个月内咬合力的变化，并研究患者主观疼痛程度与记录的OBF变化之间的关系。
从约旦科技大学牙科学院教学中心招募了47名受试者（34名女性，13名男性）。受试者年龄在18至26岁之间（平均19.0 +/- 3.36岁）。使用便携式OBF测量仪在九个时间间隔（T0 - T8）测量咬合力。在每次记录OBF时，要求受试者使用视觉模拟量表（VAS）描述其主观疼痛程度。应用重复测量方差分析和Bonferroni事后比较检验来确定不同时间间隔的差异。
正畸治疗的第一个月咬合力显著降低，到第一周结束时，约50%的治疗前OBF丧失。然而，到第六个月末咬合力恢复到治疗前水平。治疗前2周视觉模拟疼痛评分较高，且与OBF丧失呈正相关。
正畸治疗的第一个月OBF降低，但随着时间推移，恢复到治疗前水平。
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