成人髁突增殖带的计量组织学研究

为进一步了解成人髁突增殖带细胞数量、厚度与年龄的关系，采用连续切片、多点测量法对４３例（１９～７４岁）髁突增殖带细胞排列及其厚度进行了观察。按不同年龄分为青年组（≤４５岁）、中年组（４６～５９岁）和较老年组（６０～７４岁）。对同年龄组不同区及同区不同年龄组的增殖带细胞数量、厚度与年龄的关系进行了统计分析。结果显示：不同年龄组中，增殖带的平均厚度不一，且随年龄增加细胞逐渐减少，厚度变薄，各年龄组间差异有高度显著性（Ｐ＜０．０１），中年组与较老年组间增殖带厚度差异无显著性（Ｐ＞０．０５）。各区厚度与年龄增长呈负相关关系。

Quantitative histological study of adult condylar proliferation zone

The thicknesses and cell numbers of 43 adult condylar proliferation zone were observed by serial section and multiarea measurement in order to investigate the relationships between them and age. The samples were divided into three groups by age (19-45, 46-59, 60-74). By way of statistical analysis, the cell numbers and thicknesses of different areas of the same age group, different age of the same area, and the relationship between thicknesses and age was analysed. The results show that the average proliferation zone thickness is different among different age groups, it becomes thinner with the increase of age, and the cell number is decreased. There is high significant difference among different age groups (P < 0.01). But there is no significant difference of the proliferation zone thickness between the group of 45-59 years old and the older group (60-74)(P > 0.05). There is diverse correlation between thicknesses and age increase.