Matsumoto Dental University, Oral and Maxillofacial Surgery, Shiojiri, Nagano, Japan.
Clin Interv Aging. 2009;4:451-6. doi: 10.2147/cia.s8223. Epub 2009 Nov 18.
Changes in the lamina dura are associated with dental diseases around the root of the tooth and with systemic diseases; however, the lamina dura below the crown of horizontal, incompletely impacted third molars has not been studied. Using orthopantomography, we studied the age of subjects with and without the lamina dura in 419 subjects. The participants were between the ages of 21 and 89 years. Mean age in men with the lamina dura was 30.29 +/- 9.92 and without the lamina dura was 47.64 +/- 16.32 (P < 0.0001), and in women with a lamina dura it was 29.65 +/- 8.19 and without a lamina dura 41.97 +/- 11.07 (P < 0.0001). To study the effect of aging, the relationship between the lamina dura and dental status was assessed in subjects over the age of 31 years. Alveolar bone resorption in the canine and the first molar of the ipsilateral mandible in subjects without the lamina dura was not significantly higher than in those with the lamina dura. There were no significant differences in the number of teeth lost, except in men, the number of treated teeth and the number of decayed teeth differed between groups. Disruption of the lamina dura was related to age, but with no alveolar bone resorption in the mandible.
硬骨板的变化与牙齿根部周围的口腔疾病以及系统性疾病有关；然而，尚未研究牙冠下方水平、不完全萌出的第三磨牙的硬骨板情况。我们使用全景 X 光片研究了 419 名受试者中有无硬骨板的情况。参与者年龄在 21 岁至 89 岁之间。有硬骨板的男性平均年龄为 30.29 +/- 9.92 岁，无硬骨板的为 47.64 +/- 16.32 岁（P < 0.0001），有硬骨板的女性平均年龄为 29.65 +/- 8.19 岁，无硬骨板的为 41.97 +/- 11.07 岁（P < 0.0001）。为了研究年龄的影响，我们评估了年龄超过 31 岁的受试者中硬骨板与口腔状况的关系。无硬骨板的受试者同侧下颌尖牙和第一磨牙的牙槽骨吸收并不显著高于有硬骨板的。除了男性，两组在失牙数、治疗牙数和龋齿数上没有显著差异。硬骨板的破裂与年龄有关，但下颌骨无牙槽骨吸收。
