Banca de DEFESA: FERNANDA BEZERRA CABRAL FAGUNDES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : FERNANDA BEZERRA CABRAL FAGUNDES
DATE: 28/09/2023
TIME: 08:30
LOCAL: DEPARTAMENTO DE ODONTOLOGIA - AUDITÓRIO
TITLE:

EFFECT OF LASER CURING BLUE LIGHT EXPOSURE ON THE RETINA OF RATS

KEY WORDS:

Light curing units; Laser; Retina.

PAGES: 42
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUMMARY:

Introduction: A laser curing light device, emitting blue light, was recently developed, and there are no studies to indicate the hazard effects of this light on the professional operators retina, or to ensure the protective capacity of the filters used for it. Objective: To evaluate the possible ocular effects of exposure to blue light emitted by a laser curing unit device on the retina of Wistar rats, as the protective capacity of recommended glasses with filter. Methodology: Nine Wistar rats were used in the research and their ocular structures were the objects of study. One third of the total number of eyes (n=6) were subjected to acute exposure to light from a laser (Monet®, AMD Lasers), receiving 3 daily incidences, for 24 seconds each, at a distance of 30 cm. Another third (n=6) of the sample received the same exposure protocol to the same light-curing device, but wearing glasses with an eye protection filter recommended by the manufacturer. The third group did not receive blue light, being considered the control group (n=6). Seven days after exposure of the experimental groups, the animals were anesthetized, euthanized, their eyes removed and histologically processed. Using the digitized slides, retinal parameters were measured through stereological analyses. Results: The group that received incidence without using a protective filter showed thermal damage to laser exposure, while the control group and the group that received incidence of light using protective glasses did not show a statistically significant difference in the total volume of the retina and in the volume of the retinal layers. Conclusions: In the used protocol, there was thermal damage to the entire ocular structure exposed to blue laser without the protection use, while the group that received adequate protection had its structure preserved, compared to the control group.

COMMITTEE MEMBERS:
Presidente - 1009536 - SERGEI GODEIRO FERNANDES RABELO CALDAS
Interno - 1378325 - ARTHUR CESAR DE MEDEIROS ALVES
Externa à Instituição - ARIANE SALGADO GONZAGA - UnP