Douglas de Oliveira Dhelfeson Willya, Maravilha Marina Natássia Pacheco, dos Anjos Thaís Nascimento, Gonçalves Patrícia Furtado, Flecha Olga Dumont, Tavano Karine
Post-Graduate Program in Dentistry, Federal University of Minas Gerais, Belo Horizonte - MG, Brazil.
Private Practice, Minas Gerais, Brazil.
J Int Acad Periodontol. 2015 Oct 1;17(4):116-22.
The aim of this study was to correlate radiographic examination with the clinical periodontal condition in cases of biologic width invasion by overextending restoration margins in restored premolars and molars.
The present pilot study involved nine people (mean age 32 years) with biologic width invasion by 21 surfaces overextending restoration margins in restored premolars and molars. Radiographs were made in a standardized unit using the interproximal technique and were evaluated by a single calibrated investigator. The clinical periodontal parameters were analyzed with the use of a computerized periodontal probe. Exploratory analysis and Spearman's correlation were used to perform statistical analyses (SPSS, p < 0.05).
The most prevalent teeth with biologic width invasion were second premolars and first molars. Mean plaque index was 30.76%, and bleeding on probing was 27.0%. The mesial surface was invaded in 47.6% of cases and the distal surface in 52.4%. The 21 sites with biologic width invasion were found in patients with the following periodontal status: periodontal health (11 sites), gingivitis (2 sites), mild periodontitis (7 sites) and moderate periodontitis (1 site). There was a correlation between plaque index and bleeding on probing with the horizontal component of the bone level.
There was correlation between the radiographic parameters of biologic width invasion and clinical conditions. The measure of the bone crest level correlated with the gingival recession. The horizontal component of bone defect correlated with plaque index and bleeding on probing.
本研究旨在探讨在修复的前磨牙和磨牙中，修复边缘过度伸展导致生物学宽度侵犯的病例中，影像学检查与临床牙周状况之间的相关性。
本初步研究纳入了9名患者（平均年龄32岁），其21个牙面存在生物学宽度侵犯，这些牙面为修复的前磨牙和磨牙中修复边缘过度伸展的部位。使用邻面技术在标准化设备上进行X线片拍摄，并由一名经过校准的研究者进行评估。使用计算机化牙周探针分析临床牙周参数。采用探索性分析和Spearman相关性分析进行统计分析（SPSS，p<0.05）。
生物学宽度侵犯最常见的牙齿是第二前磨牙和第一磨牙。平均菌斑指数为30.76%，探诊出血率为27.0%。47.6%的病例中近中面受到侵犯，52.4%的病例中远中面受到侵犯。在具有以下牙周状况的患者中发现了21个存在生物学宽度侵犯的部位：牙周健康（11个部位）、牙龈炎（2个部位）、轻度牙周炎（7个部位）和中度牙周炎（1个部位）。菌斑指数和探诊出血与骨水平的水平分量之间存在相关性。
生物学宽度侵犯的影像学参数与临床状况之间存在相关性。牙槽嵴水平的测量与牙龈退缩相关。骨缺损的水平分量与菌斑指数和探诊出血相关。
