Low Laser Light Therapy After Impacted Third Molar Removal
Low Laser Light Therapy After Impacted Third Molar Removal
Third molars extraction is a surgery frequently performed in dentistry. It is generally
 associated to a great postoperative distress rendered by pain, swelling and trismus, caused
 by surgical trauma inflammation. Several methods have been proposed to prevent these
 complications and to increase tissue repair quality. The use of low level laser therapy
 (LLLT) has been reported in dentistry since 1970. A large number of studies have reported the
 benefits of LLLT without collateral damage, positive effect as an anti-inflammatory agent and
 benefits in accelerating wound repair. However, some clinical applications strategies have
 been contradictories in everyday practice with results not always equivalent.

 Objective: To verify if a single LLLT intra or extra oral application, singly, are analogous
 in their effects in controlling postoperative edema, trismus, pain and wound repair in third
 molar surgery.
30 healthy participants of both genders, with 18 to 35 years-of-age, with the necessity of
 inferior bilateral third molar removal will be selected. Inclusion criteria will consider the
 presence of upper central incisive and same surgical difficulty for third molar extraction.
 Participants that present chronic TMJ pain, neurological or psychiatric disorders,
 pericoronitis, anti-inflammatory or analgesic use for the last 15 days, bisphosphonates usage
 history at any time, tabagism, pregnancy or a family history of photosensitivity and
 hypersensibility to analgesics, anti-inflammatory or antibiotics will not be included. The
 surgical procedures will be randomized for the group to be assigned respecting the interval
 of one month between the surgeries.

 Intra-oral group (IO) will be that in whose participant will receive the LLLT (Photon Lase
 III DMC equipment) with 660 nm wavelength, 100 mW of power, 107J / cm2 of power density,
 during 30 seconds, positioning the tip of the laser device in straight contact with each of
 the four points in the surgical area:

 1. corresponding to the occlusal surface of the tooth surgically extracted,

 2. in the middle third of the lingual surface, point

 3. the middle third of the buccal surface and point

 4. retro molar triangle region. Each point will receive energy 3J (Et= 12J).

 The extra-oral group (EO) will receive phototherapy with the 808nm of wavelength following
 the same above protocol although positioning the laser point over the skin in straight
 contact with four points on the masseter muscle:

 1. next jaw insert,

 2. lower middle region,

 3. upper middle region

 4. near the insertion of the zygomatic arch.

 In the IO group the extra-oral region will not be irradiated (the laser tip will be put in
 place without energy) in the EO group it will be done the opposite, so as the same patient
 will be the control because the participant will not be capable to identify which group he
 belongs to. The same investigator will perform surgical procedures and laser therapy. All
 participants will receive the same postoperative medication. Three distances will evaluate
 the range of edema: from tragus to the corner of the mouth, from gonial angle to the corner
 of the mouth and from gonial angle to the corner of the eye using a malleable millimeter
 rule. Trismus will be evaluated by the maximum range of mouth opening considering the
 inter-incisal distance between the edges of upper and lower right central incisors by a
 caliper in three moments: before surgery, 24 hours and 8 days after surgery. Participants
 will be asked to fill in a diary to assess the severity of postoperative pain on a visual
 analogue pain scale after the end of anesthetic effect: 4, 6, 8, 24, 48 hours
 postoperatively. The amount and time of medication will be also recorded. The quality of
 wound repair will be evaluated by two blinded calibrated observers, 24 hours and 8 days
 postoperatively in score from 0 to 3. The data will be submitted to appropriate statistical
 analysis for non-parametric samples.
Inclusion Criteria:

 -  necessity of bilateral impacted third molar removal with similar dental arch
 positioning and similar surgical difficulty.

 Exclusion Criteria:

 -  Compromised Systemic Health status, Neurologic and/or mental disorders, local
 infection history, anti-inflammatory or analgesic use for the last 15 days, tabagism,
 ethylism, pregnancy.