Abstract
Background
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.
Methods
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.
Result
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).
Conclusion
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.
Comments