Tal H
J Periodontol. 1984 Mar;55(3):149-54. doi: 10.1902/jop.1984.55.3.149.
One hundred mandibles of South African Negroes were examined for the presence of intrabony defects, and the distance between the cemento-enamel junction and alveolar bone crest was measured along the buccal and lingual surface of roots associated with interdental craters. Two-hundred thirty-one intrabony defects were detected (4.1% of the possible occurrences). There were 51 craters, 19 of which were associated with the distal surfaces of the second molars. Most craters (84.3%) had higher lingual than buccal walls. Seventy-one defects (35.8%) were one-walled pockets, 98 defects (49.6%) were two-walled pockets and 30 (15%) were three-walled pockets. Twenty-eight one-walled pockets (39.4%) formed hemisepta against interproximal root surfaces. Mesial surfaces of canines were the most commonly involved with hemisepta. There was an increase in the frequency of intrabony pockets from the anterior to the posterior zones of the mandibles. Interproximal root surfaces were by far more commonly associated with defects than buccal or lingual surfaces.
对100例南非黑人的下颌骨进行检查，以确定是否存在骨内缺损，并沿着与牙间凹坑相关的牙根颊面和舌面测量牙骨质-釉质界与牙槽嵴之间的距离。共检测到231处骨内缺损（占可能出现情况的4.1%）。有51个凹坑，其中19个与第二磨牙的远中面相关。大多数凹坑（84.3%）的舌侧壁高于颊侧壁。71处缺损（35.8%）为单壁袋状，98处缺损（49.6%）为双壁袋状，30处（15%）为三壁袋状。28个单壁袋状（39.4%）形成了与邻面牙根表面相对的半隔。犬牙的近中面最常与半隔相关。下颌骨从前区到后区骨内袋状的频率增加。到目前为止，邻面牙根表面比颊面或舌面更常与缺损相关。
