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安炯珪 大韓顎顔面 放射線學會 1981 Imaging Science in Dentistry Vol.11 No.1
The study was performed to investigae the thickness of lamina dura of the human teeth in periodontal desease, which obtained from the intraoral roentgenograms of the 122 cases taken by bisecting technic. All films were divided into the different ages, the different sexes, and the different location of the different teeth. The obtained results were as follows: 1.Compared with the normal teeth, the thickness of lamina dura in periodontal disease is increased in all of different ages, sexes and teeth. A Average thickness of the whole cases. Male Mx. teeth Mn. teeth 21-30 yrs.grp. 0.432mm 0.428mm 31-40 yrs.grp. 0.392mm 0.395mm 41-60 yrs.grp. 0.411mm 0.422mm Female Mx. teeth Mn. teeth 21-30 yrs.grp. 0.459mm 0.452mm 31-40 yrs.grp. 0.405mm 0.433mm 41-60 yrs.grp. 0.385mm 0.401mm 2.Generally, the alveolar crest portion is the thickest among the root sufaces, and midroot,apex followed, and the average thinckness of the posterior teeth is thicker than that of anterior teeth. 3.The mean value of the whole maxillary teeth is almost same as that of mandibular teeth. 4.On the whole cases, the differences of male and female is about 0.01mm, which is not a significant differences.