Effect of biostimulation on healing of bone defects in diabetic rats.
OBJECTIVE
The aim of this study was to investigate the effects of biostimulation on healing of bone defects in diabetic rats.


METHODS
Twenty-eight Wistar rats weighting 250 to 300 g were used for this study. Diabetes was chemically induced with streptozotocin, and 14 nondiabetic and 14 diabetic rats were included in the study. The distal epiphysis of the right and left femurs of the diabetic rats were perforated with a surgical bone drill. This surgical procedure was performed on the left femurs of normal rats too. The wound on the right side of each diabetic rat received laser stimulation. The left femur of each nondiabetic (normal) rat served as a control. The rats were assigned to three experimental groups: (1) normal bur (control group); (2) diabetic bur; (3) diabetic bur + biostimulation.


RESULTS
There was a significant difference among all groups in substantia spongiosa formation on day 10. According to the Mann-Whitney U test, there was a difference between Groups 1 and 2. A significant difference was noted between Groups 2 and 3 as well as between Groups 1 and 3 and between Groups 2 and 3 in union at 20 d of healing.


CONCLUSIONS
Substantia spongiosa formation was slightly more evident in Groups 1 and 3 than in Group 2. Also, there was more union in Group 3 than in the other groups on day 20. As a result, it can be concluded that low-level laser therapy (808 nm laser at 10 J/cm(2)) can have a beneficial effect on spongiosa in diabetic bone repair when five treatments are administered with 2 d intervals between treatments.
Ataturk University, Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Erzurum, Turkey. utkanakyol@yahoo.com
Utkan Kamil
UK
Akyol
Metin
M
Güngörmüş
D000818:Animals; D016723:Bone Remodeling / Q000528:radiation effects*; D003921:Diabetes Mellitus, Experimental / Q000473:pathology / Q000503:physiopathology*; D005264:Femoral Fractures / Q000473:pathology / Q000503:physiopathology* / Q000532:radiotherapy*; D053844:Lasers, Solid-State; D028022:Low-Level Light Therapy; D051381:Rats; D017208:Rats, Wistar; D014945:Wound Healing / Q000528:radiation effects*