title: Choosing between intraoral or extraoral, red or infrared laser irradiation after impacted third molar extraction.
abstract: Swelling and trismus are complications experienced by nearly all subjects after undergoing oral surgery for the removal of impacted teeth. The main purpose of this paper was to compare the effects of photobiomodulation therapy (PBMT) at two different wavelengths applied intra-orally and extra-orally on facial swelling and trismus in the postoperative period following the extraction of impacted mandibular third molars.
  
  
  
  Sixty subjects were randomly divided into five groups, taking into account the type of laser therapy applied after surgery (intraoral or extraoral irradiation with 660 nm laser; intraoral or extraoral irradiation with 808 nm; and sham irradiation). Two and seven days after the surgery, two blinded evaluators measured the subjects' faces (swelling), and mouth opening (trismus).
  
  
  
  There was a statistically significant interaction between the irradiation site and wavelength (swelling and trismus were smaller if the red laser was applied intra-orally or if infrared laser was applied extra-orally). The intra-group analyses showed that 808 nm laser applied extra-orally favored reductions in postoperative facial swelling and trismus, although the inter-group comparisons revealed no statistically significant differences.
  
  
  
  Besides energy parameters, the combination of irradiation site and wavelength drive the results of phototherapy after the removal of impacted teeth. Lasers Surg. Med. 48:511-518, 2016. © 2016 Wiley Periodicals, Inc.
authors: Rehabilitation Sciences Post Graduation Program, Universidade Nove de Julho/UNINOVE, Rua Vergueiro, 249, São Paulo, São Paulo, 01504-001, Brazil.
authors: Simone Oliveira
authors: SO
authors: Sierra
authors: Biophotonics Applied to Health Sciences Post Graduation Program, Universidade Nove de Julho/UNINOVE, Rua Vergueiro, 249, São Paulo, São Paulo, 01504-001, Brazil.
authors: Alessandro Melo
authors: AM
authors: Deana
authors: Rehabilitation Sciences Post Graduation Program, Universidade Nove de Julho/UNINOVE, Rua Vergueiro, 249, São Paulo, São Paulo, 01504-001, Brazil.|Biophotonics Applied to Health Sciences Post Graduation Program, Universidade Nove de Julho/UNINOVE, Rua Vergueiro, 249, São Paulo, São Paulo, 01504-001, Brazil.
authors: Sandra Kalil
authors: SK
authors: Bussadori
authors: Biophotonics Applied to Health Sciences Post Graduation Program, Universidade Nove de Julho/UNINOVE, Rua Vergueiro, 249, São Paulo, São Paulo, 01504-001, Brazil.
authors: Ana Carolina Costa
authors: AC
authors: da Mota
authors: Rehabilitation Sciences Post Graduation Program, Universidade Nove de Julho/UNINOVE, Rua Vergueiro, 249, São Paulo, São Paulo, 01504-001, Brazil.|Biophotonics Applied to Health Sciences Post Graduation Program, Universidade Nove de Julho/UNINOVE, Rua Vergueiro, 249, São Paulo, São Paulo, 01504-001, Brazil.
authors: Raquel Agnelli Mesquita
authors: RA
authors: Ferrari
authors: Biophotonics Applied to Health Sciences Post Graduation Program, Universidade Nove de Julho/UNINOVE, Rua Vergueiro, 249, São Paulo, São Paulo, 01504-001, Brazil.
authors: Katia Llanos
authors: KL
authors: do Vale
authors: Biophotonics Applied to Health Sciences Post Graduation Program, Universidade Nove de Julho/UNINOVE, Rua Vergueiro, 249, São Paulo, São Paulo, 01504-001, Brazil.
authors: Kristianne Porta Santos
authors: KP
authors: Fernandes
mesh_terms: D000328:Adult; D004311:Double-Blind Method; D004487:Edema / Q000209:etiology / Q000517:prevention & control; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007259:Infrared Rays / Q000627:therapeutic use*; D028022:Low-Level Light Therapy / Q000379:methods*; D008297:Male; D008964:Molar, Third / Q000601:surgery*; D009059:Mouth Diseases / Q000209:etiology / Q000517:prevention & control; D011182:Postoperative Care / Q000379:methods*; D011183:Postoperative Complications / Q000517:prevention & control*; D014081:Tooth Extraction; D014095:Tooth, Impacted / Q000601:surgery*; D016896:Treatment Outcome; D014313:Trismus / Q000209:etiology / Q000517:prevention & control
keywords: photobiomodulation therapy; phototherapy; randomized controlled trial; tooth extraction