Short term histopathological effects of GaAlAs laser on experimentally induced TMJ osteoarthritis in rabbits
Braz. oral res. (Online)
; 32: e90, 2018. tab, graf
Article
in En
| LILACS
| ID: biblio-952149
Responsible library:
BR1.1
ABSTRACT
Abstract The aim of this study was to evaluate the biostimulation (BS) effect of the gallium-aluminum-arsenide (GaAlAs) diode laser by histopathology with an experimental osteoarthritis (OA) model in the temporomandibular joints (TMJ) of rabbits, in the early period. GaAlAs diode laser is used for pain reduction in TMJ disorders. Twenty-four adult male New Zealand white rabbits were randomly divided into three equal groups Control Group (CG), Study Group 1 (SG-1), and Study Group 2 (SG-2). Mono-iodoacetate (MIA) was administered to the right TMJs of all rabbits. The rabbits did not undergo any treatment for four weeks to allow the development of osteoarthritis. In SG-1, laser BS was applied to the rabbits at 940 nm, 5 W, and 15 J/cm2 in continuous wave mode at 48-hour intervals for 14 sessions; and in SG-2, laser BS was applied with the same parameters at 24-hour intervals for 28 sessions. Laser BS was not applied to the rabbits in CG. All rabbits were sacrificed simultaneously. The TMJ cartilage, osteochondral junction, chondrocyte appearance, and subchondral ossification were evaluated histopathologically. There was no statistically significant difference between the groups in terms of cartilage, osteochondral junction, chondrocyte appearance, and subchondral ossification values (p > 0.05). The laser BS protocol used in the study had no positive histopathological effects on TMJ OA in the early period.
Key words
Full text:
1
Index:
LILACS
Main subject:
Osteoarthritis
/
Temporomandibular Joint Disorders
/
Low-Level Light Therapy
/
Lasers, Semiconductor
Type of study:
Evaluation_studies
/
Guideline
/
Prognostic_studies
Limits:
Animals
Language:
En
Journal:
Braz. oral res. (Online)
Journal subject:
ODONTOLOGIA
Year:
2018
Type:
Article