University for Veterinary Medicine, Vienna, Austria.
Vet J. 2011 Oct;190(1):49-54. doi: 10.1016/j.tvjl.2010.09.014. Epub 2010 Oct 23.
The objective of this study was to compare masticatory movements before and after dental treatment using kinematic analysis. The masticatory movements of 15 adult Warmblood horses with mild dental pathology chewing standardised hay were recorded on three consecutive days before and three times after (days 7, 21, 28) dental correction. The results of the leading mandibular tracking marker, located at the caudal edge of the inter-mandibular suture, were compared statistically. Reproducibility of measurements prior to dental treatment was excellent (P<0.05). Rostrocaudal mandibular motion was significantly reduced after dental correction (9±2mm vs. 8±2mm; P=0.046). Oscillations during the power stroke were significantly reduced after dental correction (R(2)=98.3%±0.3 vs. 98.8%±0.3; P=0.050). Although significant changes were observed in individual horses, the overall results of lateral and dorsoventral mandibular motion did not reveal significant differences. In conclusion, kinematic analysis of masticatory movements provided reproducible results and may be useful to evaluate changed movement patterns following dental correction.
本研究旨在通过运动学分析比较牙齿治疗前后的咀嚼运动。15 匹患有轻度牙齿病理学的成年温血马在连续三天咀嚼标准干草前后（第 7、21、28 天）进行了咀嚼运动记录。对位于颌间缝尾部的下颌跟踪标记的结果进行了统计学比较。治疗前测量的可重复性非常好（P<0.05）。牙齿矫正后，下颌前后运动明显减少（9±2mm 对 8±2mm；P=0.046）。牙齿矫正后，动力冲程中的振荡明显减少（R(2)=98.3%±0.3 对 98.8%±0.3；P=0.050）。尽管在个别马匹中观察到了显著变化，但侧向和背腹向下颌运动的总体结果并未显示出显著差异。总之，咀嚼运动的运动学分析提供了可重复的结果，可能有助于评估牙齿矫正后运动模式的变化。
