Evaluating Accuracy of Complete Crown 3D Superimposition Compared to Gold Standard for Measuring Gum Tissue Changes After Esthetic Crown Lengthening

What this Trial Is About

Researchers are evaluating the precision of the complete crown technique for superimposing 3D digital models to measure changes in gingival tissue volume. This technique was introduced in an earlier in-vitro study as a way to accurately and simply quantify gingival recession. The study focuses on patients scheduled for esthetic crown lengthening, comparing this new method to the gold standard technique for digital volumetric assessment in the esthetic zone. The study involves taking a digital intraoral scan before surgery T0 and another scan 6 months later T6. Both scans will be processed using specialized software where the models will be trimmed, repaired if needed, and aligned using either the complete crown technique or the gold standard method. The complete crown technique selects the crown of the tooth near the gingival margin, while the gold standard uses surrounding teeth and palatal gingiva. Accuracy of superimposition will be assessed with heat maps and further analyzed with 3D measurement software. Participants will undergo baseline and 6-month follow-up scans to monitor gingival volume changes and superimposition accuracy. Researchers will carefully check model quality and use software tools to measure alignment precision and tissue changes. The primary outcome is superimposition accuracy at 6 months, with secondary outcomes including marginal and volumetric tissue changes. The total study duration for each participant is 6 months, with follow-up visits for digital assessment and monitoring.

Assessment of The Accuracy of Complete Crown 3D Superimposition Technique Relative to The Gold Standard Technique for Digital Quantification of Volumetric Soft Tissue Changes in The Esthetic Zone