Histopathological study of the distal third fractures of radius in dogs, treated with LLLT

Abstract EN

The aim of study was a histopathological evaluation of the effects of low-level laser therapy (LLLT) such as diode laser on healing fracture of distal third of the radius in dogs, at the end of 1st,3rd and 6th week post operation .18 male adult street dogs were used to obtained transverse fracture at the distal third of the radius under highly aseptic technique, the anesthesia was done by using the combination of (15 mg/Kg.B.W ) ketamine hydrochloride,and (5 mg/Kg.B.W ) xylazine, the fractured limb fixed with (Gypson) as an external fixation devise, and window is obtained at the anterior surface of the radius at the fracture sites for direct irradiation of the laser.

The experimental animals were divided into two equal groups each contain 9 dogs, the control group lift without any irradiation, while the treatment groups received daily single dose of laser (850 nm, for 5 minutes at 72 hours interval for 14th days).

Histopathological finding at the end of the 1st week revealed early formation of irregular trabecular bone (immature woven bone), compare with the control group at the same period, then these trabecular bone became later more regular, dense and width at the end of the 3rd week in the treatment group, then quickly changed to lamellar bone in the end of the 6th wk P.O.

in the treatment group compare with the control group.

It concluded that The LLLT promote and accelerate fracture healing, in the distal third of the radius in dogs