Purpose: to demonstrate the clinical effectiveness of calcium sulphate to act as a barrier and filling material for the treatment of ‘through and through’ bony lesions.
•20 patients participated in this study
•Inclusion criteria : previous RCT and retreatment ( except 2 cases ) with persistent bony lesion , bone defect wider than 10 mm with lack of both buccal and lingual plates, fistula tracts and recurrent episodes of purulent discharge
•All the cases received conventional root canal retreatment (except two). After a minimum follow-up of 3 months, if the lesion had remained unchanged, the patient was scheduled for the periradicular surgery and included in the present study
•The 20 cases were randomly assigned , 10 to the test group and 10 to the control group prior to surgery (the two without retreatment were assigned one to each group).
•The treatment consisted of conventional apicectomy and root-end filling, with Super EBA cement for both groups
•Radiographic healing was classified as complete healing, incomplete healing (scar tissue), uncertain healing, or unsatisfactory healing
•Most highlighted Results:
-Control group: The six-month control showed that three teeth were completely healed, five incompletely healed, and two had unsatisfactory healing , At 12 months postoperatively the outcome remained the same. vTest group: At 6 months seven sites showed complete healing and two cases (incomplete healing , At 12 months no changes were detected compared to the previous screening.
• Using calcium sulphate should be considered especially in treatment of through and through bony lesion