Comparison of different methods involved in the planning of clinical crown lengthening surgery

Abstract

There is little material in the literature that compares biological width measurements in periapical and bite-wings radiographs with clinical measurements. The purpose of this study was to compare measurements of biological width taken by three different methods which are frequently used for planning periodontal surgery -periapical radiograph, bite-wing radiograph and transperiodontal probing -with the trans-surgical measurements. Thirty-four sites from twenty-one subjects were analyzed. The intra-class correlation coefficients between measurements obtained trans-surgically (gold standard) and those obtained by transperiodontal probing, periapical radiography and bite-wing radiography were determined. Average measurements were compared using the Wilcoxon test at a significance level of 0.05. Also, the frequency distribution of differences between test measurements and the gold standard was calculated. The results showed that transperiodontal probing (mean 2.05 mm) was the most accurate measurement, as compared to the gold standard (mean 1.97 mm), with no statistically significant difference observed. On the other hand, periapical and bite-wing radiographic mean values (1.56 mm and 1.72 mm, respectively) were smaller than the gold standard, with statistically significant differences (p < 0.05). It was concluded that transperiodontal probing was the most accurate measurement, as compared to the gold standard, followed by that obtained with the bite-wing radiograph. The clinical relevance of these results could be that planning for crown lengthening surgery should, preferably, include transperiodontal probing.

Cone-beam computed tomography performance in measuring periodontal bone loss

“…(17) is supposed to be the difference between CBCT and CAL. Although the biological width may involve variations among subjects, the variations are small (21,22).…”

Crown lengthening procedures: A literature review

“…In a study comparing 3 different methods used for planning of CLP, transgingival probing was the most accurate measurement when compared to periapical and bite-wing radiographs. 30 Crown-to-root ratio…”

Virtual Planning and Rapid 3D Prototyping Surgical Guide for Anterior Crown Lengthening Surgery: A Clinical Case Report

“…Another approach utilizes traditional vacuum-formed materials. [7][8][9][10] Virtual planning and 3D printing for crown lengthening were outlined in an recent report. 11 Another report outlines the use of computer-aided design and computer-aided manufacturing (CAD-CAM) to generate these guides using commercial software.…”

“…One method is to use the clinician's perception based on the alveolar crest height being 3 mm below the crown or cemento‐enamel junction (CEJ) margin via transperiodontal probing, radiographs, or standardized crown to root ratio guides. Another approach utilizes traditional vacuum‐formed materials 7–10 …”