Lauriti Leandro, de Cerqueira Luz João Gualberto, Agnelli Mesquita-Ferrari Raquel, Fernandes Kristianne Porta Santos, Deana Alessandro Melo, Tempestini Horliana Anna Carolina Ratto, Costa-Santos Larissa, Brugnera Junior Aldo, Bussadori Sandra Kalil
1 Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University , São Paulo, Brazil .
2 Department of Surgery, University of São Paulo , São Paulo, Brazil .
Photomed Laser Surg. 2018 Jan;36(1):24-30. doi: 10.1089/pho.2017.4334. Epub 2017 Oct 12.
The aim of this study was to evaluate the effect of phototherapy on bite force, facial swelling, mandibular movements, and pain in patients having undergone surgical treatment for mandibular fractures.
These are among the predominant types of facial fractures, and treatment involving surgical fixation with titanium plates is one of the most common procedures in oral-maxillofacial surgery. Phototherapy has been used to accelerate the muscle healing process and significantly improves muscle regeneration by inducing the formation of new muscle fibers.
The patients were divided into two groups: Group 1-active phototherapy, and Group 2-sham phototherapy. Both groups underwent the surgical procedure by the same surgeon using the same surgical technique. Dosimetric parameters are wavelength, 660 nm; power, 108 mW; radiant energy, 21.6 J; fluency, 21.6 J/cm; radiance, 38197 mW/cm; exposure time, 200 sec per point, 10 points bilaterally. Photobiomodulation was performed in 15 sessions.
The primary variable was bite force measured with a gnathodynamometer and the secondary variables were facial swelling, mandibular movements (measured with digital calipers), and pain. The Student's t-test was used to determine intergroup differences.
The findings suggest improvements in the laser group in comparison with the sham group with regard to mandibular dynamics, a reduction in postoperative facial swelling, a reduction in pain, and an increase in bite force.
本研究旨在评估光疗对接受下颌骨骨折手术治疗患者的咬合力、面部肿胀、下颌运动及疼痛的影响。
这些是面部骨折的主要类型，采用钛板进行手术固定的治疗是口腔颌面外科最常见的手术之一。光疗已被用于加速肌肉愈合过程，并通过诱导新肌纤维的形成显著改善肌肉再生。
患者分为两组：第1组为主动光疗组，第2组为假光疗组。两组均由同一位外科医生采用相同的手术技术进行手术。剂量学参数为波长660nm；功率108mW；辐射能量21.6J；通量21.6J/cm；辐亮度38197mW/cm；每点照射时间200秒，双侧各10点。进行15次光生物调节治疗。
主要变量是用咬力计测量的咬合力，次要变量是面部肿胀、下颌运动（用数字卡尺测量）和疼痛。采用学生t检验确定组间差异。
研究结果表明，与假治疗组相比，激光治疗组在下颌动力学方面有所改善，术后面部肿胀减轻，疼痛减轻，咬合力增加。
