Southard T E, Southard K A, Lee A
University of Iowa, Department of Orthodontics, Iowa City 52242, USA.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2001 Apr;91(4):486-91. doi: 10.1067/moe.2001.112598.
Our goal was to determine whether the radiographic fractal dimension of the maxillary and mandibular alveolar processes is related to bone density of the alveolar processes, spine, hip, and radius in healthy women.
Thirty-seven dentate healthy white women aged 20 to 78 years underwent assessment of systemic and alveolar process bone. After a periodontal examination, D-speed vertical bite-wing and periapical radiographs with aluminum step wedges and a density correction algorithm were used to make alveolar process fractal dimension and density calculations within regions of interest that avoided crestal bone and intrabony defects. Anteroposterior (L1-L4) and lateral (L2-L4) lumbar spine, total hip, and total wrist densities were determined by means of dual energy x-ray absorptiometry.
Correlation analysis revealed significant relationships between maxillary alveolar process fractal dimension and maxillary alveolar process density (r = 0.47, P < or =.01), mandibular alveolar process density (r = 0.48, P < or =.01), and mandibular alveolar process fractal dimension (r = 0.44, P < or =.05); and between mandibular alveolar process fractal dimension and maxillary alveolar process density (r = 0.54, P < or =.01) and mandibular alveolar process density (r = 0.58, P < or =.001). No significant relationships were found between the maxillary alveolar process or the mandibular alveolar process fractal dimension and the density of any postcranial regions.
In healthy women, the alveolar process radiographic fractal dimension is significantly related to the alveolar process density but is not related to the density of the spine, hip, or radius.
我们的目标是确定健康女性上颌和下颌牙槽突的放射学分形维数是否与牙槽突、脊柱、髋部和桡骨的骨密度相关。
37名年龄在20至78岁之间的有牙健康白人女性接受了全身和牙槽突骨评估。在进行牙周检查后，使用带有铝阶梯楔形块和密度校正算法的D速垂直咬合翼片和根尖片，在避免嵴顶骨和骨内缺损的感兴趣区域内进行牙槽突分形维数和密度计算。通过双能X线吸收法测定腰椎前后位（L1-L4）和侧位（L2-L4）、全髋和全腕部的骨密度。
相关性分析显示，上颌牙槽突分形维数与上颌牙槽突密度（r = 0.47，P≤0.01）、下颌牙槽突密度（r = 0.48，P≤0.01）和下颌牙槽突分形维数（r = 0.44，P≤0.05）之间存在显著相关性；下颌牙槽突分形维数与上颌牙槽突密度（r = 0.54，P≤0.01）和下颌牙槽突密度（r = 0.58，P≤0.001）之间也存在显著相关性。未发现上颌牙槽突或下颌牙槽突分形维数与任何颅后区域的密度之间存在显著相关性。
在健康女性中，牙槽突的放射学分形维数与牙槽突密度显著相关，但与脊柱、髋部或桡骨的密度无关。
