Freezer S R, Sims M R
Department of Dentistry, University of Adelaide, South Australia.
Arch Oral Biol. 1987;32(6):407-12. doi: 10.1016/0003-9969(87)90075-6.
Mandibular, mesiobuccal ligament was sectioned from the alveolar crest to the apex at predetermined levels. Data collected using standard point counting procedures was analysed for main effects due to animal, side of mouth, depth and zone across the ligament. Statistically-significant variations only occurred between different lateral thirds with the middle third containing the most oxytalan fibres and the bone third the greatest vascular and neural volumes. Stereology showed that the ligament was 3-7 times more vascular than other connective tissues. Eighty-eight per cent of the periodontal blood volume was enclosed in vessels with a mean lumenal diameter of 20.9 microns and characterized by a thin endothelial lining and few perivascular cells. These vessels had a surface density of 125.1 cm2/cm3. Oxytalan fibres had a length density of 1258 X 10(3) cm/cm3 and a mean caliper diameter of 0.7 micron. Furthermore, 78 per cent of fibres were adjacent to cells, 14 per cent within principal collagen fibres and 8 per cent in the walls of blood vessels. The length density of nerves within the ligament was 255.9 X 10(3) cm/cm3. Unmyelinated axons constituting 95 per cent of periodontal nerve fibres had a mean caliper diameter of 1.4 micron.
在预定水平将下颌近中颊侧韧带从牙槽嵴至根尖切断。使用标准点计数程序收集的数据，针对动物、口腔侧别、深度以及韧带不同区域等主要影响因素进行分析。仅在不同外侧三分之一区域之间出现了具有统计学意义的差异，其中中间三分之一区域含有最多的氧化弹力纤维，而骨侧三分之一区域的血管和神经体积最大。体视学显示，该韧带的血管含量比其他结缔组织多3至7倍。88%的牙周血容量包含在平均管腔直径为20.9微米的血管中，其特征为内皮衬里薄且血管周围细胞少。这些血管的表面密度为125.1平方厘米/立方厘米。氧化弹力纤维的长度密度为1258×10³厘米/立方厘米，平均卡尺直径为0.7微米。此外，78%的纤维与细胞相邻，14%在主要胶原纤维内，8%在血管壁内。韧带内神经的长度密度为255.9×10³厘米/立方厘米。构成95%牙周神经纤维的无髓轴突平均卡尺直径为1.4微米。
