title: Evaluation of treatment outcome after impacted mandibular third molar surgery with the use of autologous platelet-rich fibrin: a randomized controlled clinical study.
abstract: OBJECTIVE
  To assess the effect of platelet-rich fibrin (PRF) on postoperative pain, swelling, trismus, periodontal healing on the distal aspect of the second molar, and progress of bone regeneration in mandibular third molar extraction sockets.
  
  
  METHODS
  Over a 2-year period, 31 patients (mean age, 26.1 yr) who required surgical extraction of a single impacted third molar and met the inclusion criteria were recruited. After surgical extraction of the third molar, only primary closure was performed in the control group, whereas PRF was placed in the socket followed by primary closure in the case group (16 patients). The outcome variables were pain, swelling, maximum mouth opening, periodontal pocket depth, and bone formation, with a follow-up period of 3 months. Quantitative data are presented as mean. Statistical significance was inferred at a P value less than .05.
  
  
  RESULTS
  Pain (P = .017), swelling (P = .022), and interincisal distance (P = .040) were less in the case group compared with the control group on the first postoperative day. Periodontal pocket depth decreased at 3 months postoperatively in the case (P < .001) and control (P = .014) groups, and this decrease was statistically significant. Bone density scores at 3 months postoperatively were higher in the case group than in the control group, but this difference was not statistically important.
  
  
  CONCLUSIONS
  The application of PRF lessens the severity of immediate postoperative sequelae, decreases preoperative pocket depth, and hastens bone formation.
authors: PG Trainee, Department of Oral and Maxillofacial Surgery, M.S. Ramaiah Dental College and Hospital, Bangalore, Karnataka, India. Electronic address: nilima.kumar@rediffmail.com.
authors: Nilima
authors: N
authors: Kumar
authors: Professor and Department Head, Department of Oral and Maxillofacial Surgery, M.S. Ramaiah Dental College and Hospital, Bangalore, Karnataka, India.
authors: Kavitha
authors: K
authors: Prasad
authors: Senior Professor, Department of Oral and Maxillofacial Surgery, M.S. Ramaiah Dental College and Hospital, Bangalore, Karnataka, India.
authors: Laitha
authors: L
authors: Ramanujam
authors: Professor, Department of Oral and Maxillofacial Surgery, M.S. Ramaiah Dental College and Hospital, Bangalore, Karnataka, India.
authors: Ranganath
authors: R
authors: K
authors: Reader, Department of Oral and Maxillofacial Surgery, M.S. Ramaiah Dental College and Hospital, Bangalore, Karnataka, India.
authors: Jayashree
authors: J
authors: Dexith
authors: PG Trainee, Department of Oral and Maxillofacial Surgery, M.S. Ramaiah Dental College and Hospital, Bangalore, Karnataka, India.
authors: Abhishek
authors: A
authors: Chauhan
mesh_terms: D000328:Adult; D064592:Autografts / Q000502:physiology*; D001792:Blood Platelets / Q000502:physiology*; D015519:Bone Density / Q000187:drug effects; D001861:Bone Regeneration / Q000187:drug effects; D004487:Edema / Q000209:etiology; D005260:Female; D005337:Fibrin / Q000627:therapeutic use*; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008334:Mandible / Q000601:surgery; D008963:Molar / Q000473:pathology; D008964:Molar, Third / Q000601:surgery*; D010012:Osteogenesis / Q000187:drug effects; D010149:Postoperative Pain / Q000209:etiology; D010514:Periodontal Pocket / Q000209:etiology; D011183:Postoperative Complications; D014081:Tooth Extraction / Q000379:methods*; D020390:Tooth Socket / Q000187:drug effects; D014095:Tooth, Impacted / Q000601:surgery*; D016896:Treatment Outcome; D014313:Trismus / Q000209:etiology
chemical_list: D005337:Fibrin