Retained third molars are teeth linked to several conditions of the mouth, therefore, in most cases, surgical extraction is required. Surgical procedures undertaken to extract retained third molars bring about surgical procedures effects. The aim of the present study was to determine healing effectiveness in bone and gingival tissue with use of platelet rich fi brin in surgical procedures involving lower third molar extraction performed at the Surgical Center of the School of Dentistry, Central University of Ecuador in the period comprised May-September 2015. A comparative study was performed of 30 patients meeting inclusion criteria. Eight days after extraction, patients were controlled by means of direct observation of surgical site; 60 days after extraction, a digital panoramic X-ray of the jaws was taken and analyzed with software RadiAnt DICOM Viewer. For soft tissue, healing results were obtained with χ 2 test p < 0.001, and for bone tissue results were obtained with t-Student test p = 0.015. RESUMENLos terceros molares retenidos son dientes que se encuentran ligados a una serie de patologías en la cavidad bucal, por lo que se requiere su extracción quirúrgica en la mayoría de los casos. Los procedimientos quirúrgicos para extraer terceros molares retenidos, traen consigo efectos propios de la cirugía. El objetivo de este estudio fue determinar la efectividad cicatrizante en tejido óseo y gingival con el uso de la fi brina

Retained third molars are teeth linked to several conditions of the mouth, therefore, in most cases, surgical extraction is required. Surgical procedures undertaken to extract retained third molars bring about surgical procedures effects. The aim of the present study was to determine healing effectiveness in bone and gingival tissue with use of platelet rich fi brin in surgical procedures involving lower third molar extraction performed at the Surgical Center of the School of Dentistry, Central University of Ecuador in the period comprised May-September 2015. A comparative study was performed of 30 patients meeting inclusion criteria. Eight days after extraction, patients were controlled by means of direct observation of surgical site; 60 days after extraction, a digital panoramic X-ray of the jaws was taken and analyzed with software RadiAnt DICOM Viewer. For soft tissue, healing results were obtained with χ 2 test p < 0.001, and for bone tissue results were obtained with t-Student test p = 0.015.