The goal of this randomized controlled trial is to evaluate the amount of interdental papilla fill following the injection of the fat graft compared to hyaluronic acid filler in patients with interdental papilla deficiency. Highly motivated patients having at least one deficient papilla with the presence of a contact point between adjacent teeth in the inter-bicuspid region. Papillary deficiency types I or II, according to Nordland and Tarnow (1998)classification will be selected. The main question it aims to answer is: In patient with interdental papillary deficiency, will injecting autogenous fat increase papilla height compared to hyaluronic acid injection? Participants in the test group will receive fat graft injection in the inter dental papilla. In the injection phase, 3 injections will be given at each papilla site: at baseline, 3 and 6 weeks intervals. While in the control group, hyaluronic acid injection in the interdental papilla and also 3 injections will be given at each papilla site at the same intervals.
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change in Black Triangle Height (BTH)
Timeframe: Specific measurement time point: at baseline and after 6 months postoperatively.