Osteoplasty in Conjunction With Surgical Treatment of Mandibular Grade III Furcation Defects (FURC-III-OST)

Treatment of Grade III Furcation Defects in Teeth With Low Interproximal Crestal Bone Height, With and Without Osteoplasty, in Conjunction With Open Flap Debridement

Teeth with furcation grade III defects will be treated with open flap debridement, with or without osteoplasty. The study is designed to examine the effect of osteoplasty in the treatment of teeth with furcation grade III defects with open flap debridement.

Inclusion Criteria:

• Periodontal disease stage III or IV according to 2018 criteria
• Undergoing periodontal therapy (active or supportive) and present 1 or more pair of bilateral mandibular molars affected by furcation involvement grade III with PPD>4mm, and the furcation fornix must be above a tangential line from the distal to mesial interproximal crestal bone level on bitewing radiographs
• Competent to give consent

Exclusion Criteria:

• Previous radiotherapy to the jaws, current use of chemotherapy, systemic long-term corticosteroid treatment
• Present or past use of bisphosphonate treatment
• Pregnant or nursing subjects
• Patients classified as > class II according to ASA classification
• Previous surgical therapy of included furcation defects
• Inhability to comprehend and respond to the quality of life questionnaire
• Dental restorations or prosthesis involving the furcation area
• Root fractures or suspected fractures/infractions
• Caries lesoins in the furcation area
• No systemic antibiotic treatment within 3 months prior to intervention