Clinical Crown Lengthening Linked With Improved Periodontal Status

Phillip Bonner, DDS


A longitudinal observational study aimed to evaluate the effectiveness of minimally traumatic controlled surgical extrusion in fractured anterior teeth crown lengthening by assessing periodontal status through clinical examination and radiographs.

The study investigated 18 patients (6 males and 12 females) at the Department of Periodontology, National Hospital of Odonto‐stomatology, Ho Chi Minh City, Vietnam. Following pre‐surgery procedures and examination, minimally traumatic controlled surgical extrusion was carried out using a periotome.

Patients were examined at 4 follow‐up appointments after 1 week, 1 month, 3 months, and 6 months to record the following experimental variables: periodontal parameters including the gingival index (GI); pocket depth (PD); bleeding on probing (BOP); mobility; marginal gingiva position; alveolar ridge resorption; periapical osteogenesis; tooth resorption; and ankylosis.

The study found that all periodontal parameters were significantly decreased at 3 and 6 months post‐procedure (P < .001). Tooth mobility decreased gradually following surgery, and at 6 months all teeth became normal at level 0. Periapical osteogenesis changes were significantly increased at 1, 3, and 6 months in comparison with pre‐surgery (P < .001).

Marginal gingiva position and alveolar ridge resorption were not significantly different between pre‐surgery and 1, 3, and 6 months post‐surgery. No cases of root resorption or ankylosis were observed at 6 months post‐surgery.

The study concluded that a minimally traumatic controlled surgical extrusion technique for clinical crown lengthening yielded highly successful results in both aesthetic and functional aspects, and no cases had unfavorable outcomes during the 6‐month follow‐up period. (Source: Dental Traumatology, Sept. 12, 2018)

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