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首页> 外文期刊>Journal of Veterinary Dentistry >Significant association between tooth extrusion and tooth resorption in domestic cats.
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Significant association between tooth extrusion and tooth resorption in domestic cats.

机译：国内猫齿挤压与牙齿吸收之间的重大关联。

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Abnormal extrusion of canine teeth is often noted in middle-aged and geriatric domestic cats. The same age group of cats also is commonly affected by tooth resorption (TR). This study explored the relationship between these two phenomena of unknown etiology. Using digital radiography, the distance between the alveolar margin (AM) and cementoenamel junction (CEJ), referred to as the AM-CEJ distance, was measured in clinically and radiographically healthy maxillary canine teeth of 24 TR-affected and 29 TR-free cats. The mean AM-CEJ distance of maxillary canine teeth of cats with and cats without TR was 2.68-mm and 2.22-mm, respectively. An analysis of covariance adjusting for age revealed a significant correlation (p = 0.02) between tooth extrusion and TR. Extrusion of the maxillary canine teeth became clinically apparent when an AM-CEJ distance of 2.5-mm or greater was evident in the absence of horizontal or vertical alveolar bone loss. Based on this criterion, 15 of 24 cats with TR (63.0 %) exhibited extrusion of maxillary canine teeth, compared to 9 of 29 cats without TR (31.0 %). Four extruded and five non-extruded maxillary canine teeth were evaluated histologically. Cementum of extruded teeth was significantly thicker compared to that of non-extruded teeth. Four of 4 canine teeth with extrusion (100 %) showed histological evidence of resorption, compared to 1 of 5 canine teeth without extrusion (20.0 %). These results suggest that tooth extrusion is linked to or may be caused by similar factors responsible for the development of TR.
机译：犬齿牙齿的异常挤出常见于中年和老年家庭猫。同一年龄组的猫也受到牙齿吸收（TR）的影响。本研究探讨了这两种未知病因现象之间的关系。使用数字射线照相，在临床和射线摄氏性上颌犬的24个TR受影响和29个无RU的猫的临床和射线健康的上颌犬之间测量肺泡余量（AM）和粘液中的距离之间的距离。猫的上颌犬牙的平均AM-CEJ距离和无TR的猫的牙齿分别为2.68毫米和2.22毫米。调整年龄的协方差分析显示齿挤出和TR之间的显着相关性（P = 0.02）。当在没有水平或垂直肺泡骨损失时显而易见的，当2.5mm或更大的AM-CEJ距离明显时，上颌犬齿的挤出变得明显。基于该标准，具有Tr（63.0％）的24个猫（63.0％）表现出上颌犬牙齿的挤出，而没有Tr的9个猫（31.0％）。在组织学上评估四个挤出和五个非挤出的上颌犬牙齿。与非挤出牙齿相比，挤出牙齿的豆切屑显着较厚。 4种含有挤出（100％）的4个犬齿牙齿（100％）显示了吸收的组织学证据，与5个犬齿牙的1个没有挤出（20.0％）。这些结果表明，牙齿挤出链接到或可能是由负责Tr发育的类似因素引起的。

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