Kim Yun Jeong, Park Ji Man, Cho Hyun Jae, Ku Young
Department of Periodontology, Seoul National University Gwanak Dental Hospital, Seoul, Korea.
Department of Prosthodontics, Yonsei University College of Dentistry, Seoul, Korea.
J Periodontal Implant Sci. 2021 Apr;51(2):88-99. doi: 10.5051/jpis.2003460173.
Direct intraoral scanning and superimposing methods have recently been applied to measure the dimensions of periodontal tissues. The aim of this study was to analyze various correlations between labial gingival thickness and underlying alveolar bone thickness, as well as clinical parameters among 3 tooth types (central incisors, lateral incisors, and canines) using a digital method.
In 20 periodontally healthy subjects, cone-beam computed tomography images and intraoral scanned files were obtained. Measurements of labial alveolar bone and gingival thickness at the central incisors, lateral incisors, and canines were performed at points 0-5 mm from the alveolar crest on the superimposed images. Clinical parameters including the crown width/crown length ratio, keratinized gingival width, gingival scallop, and transparency of the periodontal probe through the gingival sulcus were examined.
Gingival thickness at the alveolar crest level was positively correlated with the thickness of the alveolar bone plate (<0.05). The central incisors revealed a strong correlation between labial alveolar bone thickness at 1 and 2 mm, respectively, inferior to the alveolar crest and the thickness of the gingiva at the alveolar crest line (G0), whereas G0 and labial bone thickness at every level were positively correlated in the lateral incisors and canines. No significant correlations were found between clinical parameters and hard or soft tissue thickness.
Gingival thickness at the alveolar crest level revealed a positive correlation with labial alveolar bone thickness, although this correlation at identical depth levels was not significant. Gingival thickness, at or under the alveolar crest level, was not associated with the clinical parameters of the gingival features, such as the crown form, gingival scallop, or keratinized gingival width.
直接口内扫描和叠加方法最近已应用于测量牙周组织的尺寸。本研究的目的是使用数字方法分析三种牙型（中切牙、侧切牙和尖牙）的唇侧牙龈厚度与下方牙槽骨厚度之间的各种相关性，以及临床参数。
对20名牙周健康受试者获取锥形束计算机断层扫描图像和口内扫描文件。在叠加图像上距牙槽嵴0 - 5毫米处测量中切牙、侧切牙和尖牙的唇侧牙槽骨和牙龈厚度。检查包括冠宽/冠长比、角化龈宽度、牙龈扇贝形以及牙周探针通过牙龈沟的透明度等临床参数。
牙槽嵴水平的牙龈厚度与牙槽骨板厚度呈正相关（<0.05）。中切牙在牙槽嵴下方1毫米和2毫米处的唇侧牙槽骨厚度与牙槽嵴线处（G0）的牙龈厚度之间显示出强相关性，而侧切牙和尖牙中G0与各水平的唇侧骨厚度呈正相关。临床参数与硬组织或软组织厚度之间未发现显著相关性。
牙槽嵴水平的牙龈厚度与唇侧牙槽骨厚度呈正相关，尽管相同深度水平的这种相关性不显著。牙槽嵴水平及以下的牙龈厚度与牙龈特征的临床参数，如冠形态、牙龈扇贝形或角化龈宽度无关。
