Carvalho Bruna Almeida Silva, Duarte César Augusto Barroso, Silva Jaciara Fagundes, Batista Walter Winícius da Silva, Douglas-de-Oliveira Dhelfeson Willya, de Oliveira Evandro Silveira, Soares Luana de Goés, Galvão Endi Lanza, Rocha-Gomes Gabriela, Glória José Cristiano Ramos, Gonçalves Patrícia Furtado, Flecha Olga Dumont
Department of Dentistry, Federal University of Jequitinhonha and Mucuri Valleys, Rua da Glória, n° 187. Centro, Diamantina, MG, 39100-000, Brazil.
BMC Oral Health. 2020 Apr 16;20(1):116. doi: 10.1186/s12903-020-01101-x.
The biologic width is defined as the coronal dimension to the alveolar bone that is occupied by healthy gingival tissue. The objective of the present study was to correlate radiographic findings of biologic width invasion with the periodontium status.
It were included 14 patients with restored teeth with biological width invasion, on the proximal sites, observed clinically and radiographically. 122 proximal sites were evaluated, 61 in the test group (biological width invasion) and 61 in the control group (adequate biological width). Smokers and patients presenting periodontal disease or restorations with contact in eccentric movements, horizontal over-contour or secondary caries were excluded from the sample. The invasion of the biologic width was diagnosed when the distance from the gingival margin of restoration to the bony crest was less than 3 mm. Intrabony defect and bone crest level, as well as, their vertical and horizontal components were radiographically evaluated when present. Plaque index, bleeding on probing, probing depth, gingival recession height, keratinized gingival height and thickness, and clinical attachment level were clinically evaluated. Data were subjected to Spearman's Correlation and Wilcoxon's test.
The most prevalent tooth with biological width invasion was the first molar. There was a statistically significant correlation between the bone crest (p < 0.001), vertical (p < 0.001) and horizontal (p = 0.001) components. In the test group, there was a statistically significant correlation between bleeding on probing (p < 0.001; r = 0.618) and width of gingival recession (p = 0.030; r = - 0.602) with the intraosseous component; and between keratinized gingival height and bone level (p = 0.037; r = - 0.267). In the control group, there was a correlation between plaque index (p = 0.027; r = - 0.283) with bone level and correlation between keratinized gingival thickness and bone level (p = 0.034; r = - 0.273) and intrabony component (p = 0.042; r = 0.226).
A statistically significant relationship was found between bleeding on probing and gingival recession in patients who presented intrabony defects due to the invasion of biological width, which may be also related to the thickness of the keratinized gingiva.
生物学宽度定义为健康牙龈组织占据的牙槽骨冠方尺寸。本研究的目的是将生物学宽度侵犯的影像学表现与牙周状况相关联。
纳入14例有生物学宽度侵犯的修复牙患者，在邻面部位进行临床和影像学观察。评估了122个邻面部位，试验组（生物学宽度侵犯）61个，对照组（生物学宽度正常）61个。样本排除吸烟者以及患有牙周病或修复体存在非正中运动接触、水平外形过度或继发龋的患者。当修复体牙龈边缘至牙槽嵴顶的距离小于3mm时，诊断为生物学宽度侵犯。存在骨内缺损和牙槽嵴水平时，对其垂直和水平成分进行影像学评估。对菌斑指数、探诊出血、探诊深度、牙龈退缩高度、角化龈高度和厚度以及临床附着水平进行临床评估。数据采用Spearman相关性分析和Wilcoxon检验。
生物学宽度侵犯最常见的牙位是第一磨牙。牙槽嵴（p＜0.001）、垂直（p＜0.001）和水平（p = 0.001）成分之间存在统计学显著相关性。在试验组中，探诊出血（p＜0.001；r = 0.618）和牙龈退缩宽度（p = 0.030；r = -0.602）与骨内成分之间存在统计学显著相关性；角化龈高度与骨水平之间存在相关性（p = 0.037；r = -0.267）。在对照组中，菌斑指数与骨水平之间存在相关性（p = 0.027；r = -0.283），角化龈厚度与骨水平之间存在相关性（p = 0.034；r = -0.273），与骨内成分之间存在相关性（p = 0.042；r = 0.226）。
在因生物学宽度侵犯导致骨内缺损的患者中，探诊出血与牙龈退缩之间存在统计学显著关系，这可能也与角化龈的厚度有关。
