DeLorey Mary S
Northwest Equine Dentistry, Inc., Kettle Falls, WA 99141, USA.
J Vet Dent. 2007 Sep;24(3):145-9. doi: 10.1177/089875640702400302.
The goal of this retrospective study was to record the direction of the diagonal incisor malocclusion (DIM) and excursion to molar contact (EMC) distances both before and after corrective procedures to determine if any general trends were apparent which may aid in predicting the outcome of DIM corrections. Pre-correction and post-correction data were compared to confirm a benefit to the patient from the corrective procedure. The results of this preliminary study reveal a few general trends to serve as basic guidelines for the practitioner Lateral EMC distances to the left and right in cases of DIM are commonly asymmetric. When prudently performed, corrective measures usually result in increased symmetry of EMCs. In cases of DIM, the side with the shorter EMC is more likely to remain the same rather than change after DIM correction. Decreases of EMC in one or both directions are much more common than increases in EMC after correction. In 100-300 quadrant DIMs, the EMC to the right will most likely decrease and in 200-400 quadrant DIMs, the EMC to the left will most likely decrease. Despite these helpful findings, the data obtained from this study strongly suggest the existence of multiple etiologies and progressive compensatory mechanisms complicating precise prediction of correction outcome.
这项回顾性研究的目的是记录在进行矫正程序前后，斜切牙错颌（DIM）的方向以及磨牙接触偏移（EMC）距离，以确定是否存在任何明显的总体趋势，从而有助于预测DIM矫正的结果。比较矫正前和矫正后的数据，以确认矫正程序对患者有益。这项初步研究的结果揭示了一些总体趋势，可为从业者提供基本指导。在DIM病例中，左右两侧的横向EMC距离通常不对称。如果谨慎操作，矫正措施通常会使EMC的对称性增加。在DIM病例中，EMC较短的一侧在DIM矫正后更有可能保持不变而不是改变。矫正后，EMC在一个或两个方向上的减小比增加更为常见。在100 - 300象限的DIM中，右侧的EMC最有可能减小；在200 - 400象限的DIM中，左侧的EMC最有可能减小。尽管有这些有用的发现，但从本研究中获得的数据强烈表明，存在多种病因和渐进性补偿机制，使得精确预测矫正结果变得复杂。
