Efficacy of Flat-Top Hand-Piece Using 980 nm Diode Laser Photobiomodulation on Socket Healing after Extraction: Split-Mouth Experimental Model in Dogs.

Abstract

The objective was to evaluate the effect of photobiomodulation (PBM) using 980nm diode laser therapy (0.60W, 0.77Wcm-2 , 36J, 46Jcm-2 , 60s) irradiated in continuous wave mode by flat-top hand-piece on socket healing in the maxilla and mandible. A split-mouth experimental design was performed on 6 dogs. The 3rd premolar tooth was extracted from the maxilla and mandibles for both sides. The right-sided sockets were irradiated (PBM group), and the left-sided sockets were kept as control. Irradiation was done after extraction and at 48-h interval for 14days. Both the buccal and lingual sides were irradiated to reach a total irradiation time of 120s. Bone density was evaluated at 3, 4 and 5weeks using cone beam computed tomography. We showed that maxillary sockets in the PBM group had higher bone density compared to control one at 3, 4, 5weeks (P=0.029, <0.001, <0.001), respectively. Mandibular sockets revealed no significant difference between PBM and control at 3weeks (P=0.347), while at 4 and 5weeks PBM group showed higher bone density (P=0.004, <0.001). In both groups, there was a significant increase (P<0.001) in bone density by time which was higher in the PBM group. We concluded that PBM using a flat-top hand-piece of 980-nm improved the bone density of extraction sockets.