The Effect of MTA and PRF Application in Periapical Lesions

44 apically infected periapical lesions were decided to enroll to the study from December 2016-November 2017. However; a total of 40 periapical lesions undergoing apical surgery were recruited for the planned clinical trial in the end. The study was conducted under randomized controlled protocol. Patients were informed about the surgical procedures and signed a consent form. The anticipated outcomes, possible risks and benefits of the study as well as the alternative treatment options were explained to the patients.

Groups were designed to have 10 patients in each and randomly divided into four as; control, MTA, PRF and MTA+PRF. Apical resection was performed in all groups. No other interventions were made to the control group.

Routine radiographs were taken in the 1st. 3th and 6th months. In the 12th month of the procedures computerized tomography (CT) scans were taken. Primary healing of the periapical tissues were evaluated according to the volumes and the densities of the lesions. Outcomes were measured. Comparison between the initial and the last 3D CT scan volumes were made by medical image processing software (MIMICS, Belgium). Patients have still been under control for the long term outcomes of the study.

Inclusion criteria

• Single rooted canals
• Failed previous root canal treatment
• Retreatment at least 1 year previously
• Previous surgery with unresolved bony lesion

Exclusion criteria

• More than single rooted canals
• Chronic generalized periodontitis
• Any systemic disease contraindicating oral surgical procedures
• Evidence of root fracture
• Resorptive processes involving more than apical third of the root