马鹿臼齿磨损率与年龄关系的研究

RELATIONSHIP BETWEEN MOLAR RATIOS AND AGE CLASSES OF RED DEER

1991～ 1 994年 ,在黑龙江省东部完达山林区随机收集到野生马鹿下颌骨 95个样本。采用Robinette等提出的下臼齿测量方法 ,测量了其中 72个样本 (年龄≥ 2 5龄 ) ,并提出了马鹿臼齿磨损率 (MR)的计算公式 :MR =Σ3i=1wi/Σ3i=1hi (其中 ,wi=第i个下臼齿咀嚼面的最大宽度平均值 ;hi=第i个下臼齿舌侧牙龈线至齿尖或最高点的高度平均值 )。通过MR与牙齿齿轮年龄鉴定法确定的鹿年龄之间的比较与数理统计分析 ,探讨了二者之间的关系 ,并给出了根据MR划分马鹿年龄或年龄组的定量指标及置信区间。

mandibular samples of red deer were collected at random in the Wandashan Mountains, eastern Heilongjiang Province during 1991～1994. By using Robinttes method of lower molar measurement, we measured 72 of all samples (Age≥2 5 years) and put forwards a fomula of molar ratio (MR) as follows: MR=Σ3i=1w i/Σ3i=1h i. Where, w i=the average width of occlusal surfaces of lower molar i;h i=the average heights above gum line of the corresponding lingual crests of lower molar i. By means of comparisons and statistics between MR and age of deer by determining of dental cement annuli method, The molar ratio MR as a quatitative index to determining ages or age classes of red deer was given .