Townsend Neil B, Dixon Padraic M, Barakzai Safia Z
Division of Veterinary Clinical Science, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Veterinary Centre, Easter Bush, Roslin, Midlothian, Scotland, EH25 9RG, UK.
Vet J. 2008 Dec;178(3):419-24. doi: 10.1016/j.tvjl.2008.09.027. Epub 2008 Nov 18.
The aims of this study were to objectively evaluate and quantify the process of post-extraction cheek teeth (CT) dental drift in horses, and to report on associated disorders of CT wear and long-term periodontal health. Fifty horses that had CT oral extraction because of apical infection were prospectively re-examined and a full oral examination, including measurements of some dental parameters, was performed. Narrowing of the extraction space was noted in all cases with complete closure occurring in 18% of horses. The rate of dental drift was calculated as 15.7% of extraction space/year (range 4-50%) and was not associated with the age at extraction (P=0.78) or frequency of dental care since extraction (P=0.48). There was a significant negative relationship between the rate of dental drift and the duration of time since extraction (P=0.008). Overgrowths were present on the opposite CT row in 98% of horses, including opposite the extracted CT and on the Triadan 06s and 11s. No significant difference was noted in either the number of diastemata (P=0.9) or periodontal disease score (P=0.8) between the extraction and the contralateral cheek tooth rows.
本研究的目的是客观评估和量化马拔牙后颊齿（CT）的牙漂移过程，并报告CT磨损的相关病症和长期牙周健康状况。对50只因根尖感染而拔除CT的马进行前瞻性复查，并进行全面口腔检查，包括测量一些牙齿参数。所有病例均发现拔牙间隙变窄，18%的马拔牙间隙完全闭合。牙漂移率计算为拔牙间隙的15.7%/年（范围4 - 50%），且与拔牙时的年龄（P = 0.78）或拔牙后牙齿护理频率（P = 0.48）无关。牙漂移率与拔牙后的时间长短呈显著负相关（P = 0.008）。98%的马对侧CT排出现增生，包括拔牙CT的对侧以及Triadan 06s和11s处。拔牙侧与对侧颊齿排之间的牙间隙数量（P = 0.9）或牙周疾病评分（P = 0.8）均无显著差异。
