ASSESSMENT OF BIOLOGICAL WIDTH OF ABUTMENT TOOTH RESTORED WITH FULL VENEER CROWN FOLLOWING SURGICAL CROWN LENGTHENING

Dentistry

Maintenance of sound periodontal anatomy, especially biological width, is a key to a successful Prosthesis. In case of insufficient clinical crown height, surgical crown lengthening proposed to expose sufficient tooth structure to allow proper tooth preparation with retentive crown placement without violating biologic width. This study aimed to evaluate the dimensional changes of the biological width of the abutment tooth restored with full veneer crown after surgical crown lengthening. A quasi-experimental study carried out in 30 patients for 06 months. One tooth from each sample was selected and repeatedly measured before and after surgical crown lengthening with a periodontal probe. Baseline measurements were considered as a control group, and follow up measurements were as a case group. After the baseline examination, surgical crown lengthening was done with both rotary and hand instruments. During 01, 03, and 06 months follow up periods, the free gingival margin, base of the gingival sulcus, and bone level showed apical displacement than baseline, which was statistically significant (p≤0.001). The biological width was reestablished to the baseline value at the end of 06 months with coronal exposure of the tooth.

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