Objective To analyze the morphological matching rate with a digital image recognition system in pre-and post-orthodontic treatments,and to provide forensic dentistry evidence for individual identification.Methods High-resolution digital images of the palatal rugae were taken under particular conditions from each patient in pre-and post-orthodontic treatments.Features of each digital image were extracted using a digital image recognition system and collected in the palatal rugae database.Data of the palatal rugae werematched by MATLAB software system.Results From the matching results,the accuracy rate of individual identification of orthodontic patients was 100％.The accuracy rate in matching palatal rugae patterns in pre-and post-orthodontic treatments was 95.67％.The results were statistically significant with P＜0.05.Conclusion Palatal rugae pattern is highly individual-specific.The morphologyofpalatal rugaecould bechangedby theorthodontic treatment,however,these changes may not greatly influence individual identification in forensic dentistry,providing a new potential to individual identification.%目的 利用腭皱数字图像识别系统对正畸治疗前后腭皱形态匹配正确率的分析研究,为法医学中同一认定提供理论依据.方法 利用正畸患者治疗前后腭皱形态数字图像,通过腭皱数字图像识别系统对图像的特征进行提取并收录到腭皱数字库,运用Matlab软件完成对腭皱形态数字图像的信息匹配处理.结果 正畸治疗前后,个体性检测匹配正确率各自都达到100％.正畸治疗前后腭皱形态匹配正确率为95.67％,配对检验结果P＜0.05,具有统计学意义.结论 腭皱形态具有高度的个体特异性,正畸治疗后腭皱形态会发生多种变化,但对同一认定的影响不大.腭皱形态识别为法医学同一认定提供一种新的方法和途径.
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