PDF(Pubmed)
Abstract：
OBJECTIVE: Mental index (MI) and panoramic mandibular index (PMI) are important radiomorphometric indices used for assessing the quality of the mandibular bone. The aim of this study was to investigate the possible effect of mandibular posterior tooth/teeth loss in young adults on the MI and PMI (superior panoramic mandibular index: PMI-s, and inferior panoramic mandibular index: PMI-i).
METHODS: Digital panoramic radiographs belonging to 253 patients aged between 18-35 years old were examined. According to the inclusion criteria of the study, a patient and control group was formed. The patient group (n=46) included individuals having at least one extracted tooth in the posterior region of the mandible, and the control group (n=45) included full dentate patients. The MI and PMI (PMI-i and PMI-s) were calculated bilaterally for all of the individuals.
RESULTS: No significant difference was found between the MI, PMI-i and PMI-s indices of the patient group and the control group among both genders.
CONCLUSIONS: The mandibular premolar and/or molar teeth loss in young adults did not lead to any change in the MI, PMI-i and PMI-s indices among both genders.
METHODS: Digital panoramic radiographs belonging to 253 patients aged between 18-35 years old were examined. According to the inclusion criteria of the study, a patient and control group was formed. The patient group (n=46) included individuals having at least one extracted tooth in the posterior region of the mandible, and the control group (n=45) included full dentate patients. The MI and PMI (PMI-i and PMI-s) were calculated bilaterally for all of the individuals.
RESULTS: No significant difference was found between the MI, PMI-i and PMI-s indices of the patient group and the control group among both genders.
CONCLUSIONS: The mandibular premolar and/or molar teeth loss in young adults did not lead to any change in the MI, PMI-i and PMI-s indices among both genders.
摘要：
目的：精神指数（MI）和全景下颌指数（PMI）是用于评估下颌骨质量的重要放射学指标。这项研究的目的是调查年轻成年人下颌后牙/牙齿缺失对MI和PMI的可能影响（下颌上全景指数：PMI-s，下颌下颌指数：PMI-i）。
方法：检查了253名年龄在18-35岁之间的患者的数字全景X射线照片。根据本研究的纳入标准,形成患者和对照组。患者组（n=46）包括在下颌骨后部区域至少有一颗拔牙的个体，对照组(n=45)包括完整齿状患者。双侧计算所有个体的MI和PMI(PMI-i和PMI-s)。
结果：在MI之间没有发现显着差异，两种性别中患者组和对照组的PMI-i和PMI-s指数。
结论：年轻人的下颌前磨牙和/或磨牙缺失没有导致MI的任何变化，两种性别的PMI-i和PMI-s指数。
方法：检查了253名年龄在18-35岁之间的患者的数字全景X射线照片。根据本研究的纳入标准,形成患者和对照组。患者组（n=46）包括在下颌骨后部区域至少有一颗拔牙的个体，对照组(n=45)包括完整齿状患者。双侧计算所有个体的MI和PMI(PMI-i和PMI-s)。
结果：在MI之间没有发现显着差异，两种性别中患者组和对照组的PMI-i和PMI-s指数。
结论：年轻人的下颌前磨牙和/或磨牙缺失没有导致MI的任何变化，两种性别的PMI-i和PMI-s指数。
