Evaluation the effects of Interdental osteotomies on periodontal tissues after orthognathic surgery

Today, in modern dental practice, one of the main reasons for orthodontics and orthognathic surgery, in addition to improvement in morphology and function, is prevention of periodontal problems. The purpose of this study was to evaluate. the effects of interdental osteotomies on periodontal tissues. In this prospective Cohort study, 18 patients with class II Malocclusions were selected and for them, interdental osteotomies was done. Using periodontial probes and periapical radiographies, the patient’s preoperative periodontal conditions at the site of osteotomy were evaluated as well as postoperative conditions (1,3,6 and 12 months). 1) 6 pathological periodontal lesions were found in 40 segmental osteotomy sites. 2) Among 6 pathological periodontal lesions, 4 areas were with osseous periodontal defects and 2 areas with missing teeth. 3) The prevalence of periodontal defects after segmental surgery in men was two times more than women. A low incidence of dental loss and periodontal defects occurs in the region of segmental osteotomies.