目的:目的:研究咀嚼牙缺失导致骨萎缩时左右下颌管的地形变异性。
方法:材料和方法:选择136个数字扫描进行形态计量学分析,用VatechPaX-i3DGreen口外射线照相系统拍摄的每侧68。绝对形态测量值的读数,使用标准化Ez3D-I软件在3.7,3.6,4.6,4.7颗牙齿的投影中进行左右MC铺设.
结果:结果:肺泡部分的特征在于与牙槽脊的距离,主要暴露于骨组织明显的萎缩过程。到舌脊的距离直接成比例地表示到颊脊的距离的下颌管的形态转位向量,以相同的长度减少。短无牙节段的形态测量分析确定了下颌管铺设的变异性,但其特征是下颌基部脊的恒定规则值。
结论:结论:牙列缺陷,走向缺失的牙齿,导致对骨组织的生物物理刺激减少,导致明显的形态变化,大量体积的损失和小梁层的重组,同步影响左右MC的地形变化。
OBJECTIVE: The aim: To study the topographic variability of the left and right mandibular canals in
case of bone atrophy caused by the loss of the masticatory teeth.
METHODS: Materials and methods: 136 digital scans were selected for morphometric analysis, 68 for each side taken with the Vatech PaX-i 3D Green extra-oral radiography system. The readout of absolute morphometric values, laying the left and right MC was performed in the projection of 3.7, 3.6, 4.6, 4.7 teeth using standardized Ez3D-I software.
RESULTS: Results: The alveolar part is characterized by distance to the alveolar ridge, and primarily exposed to pronounced atrophic processes of bone tissue. Distance to the lingual ridge directly proportionally indicates the morphological transposition vector of the mandibular canals for the distance to the buccal ridge, by the same length to its reduction. Morphometric analysis on a short toothless segment determines the variability of laying the mandibular canals but it is characterized by constant regular values of the ridge of the mandibular base.
CONCLUSIONS: Conclusions: Dentition defects, moving towards the missing teeth, lead to a decrease in the biophysical stimulus on bone tissue, causing pronounced morphological changes with the loss of significant volume and restructuring of its trabecular layer, which synchronously affects the topographic variability of the left and right MC.