Attachment of cultured fibroblasts and ultrastructural analysis of simulated cervical resorptions treated with high-power lasers and MTA.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod
; 109(2): e154-61, 2010 Feb.
Article
en En
| MEDLINE
| ID: mdl-19969481
ABSTRACT
OBJECTIVE:
The present study evaluated the fibroblast attachment and the morphologic changes of simulated cervical root resorptions after irradiation with high-power lasers and the use of mineral trioxide aggregate (MTA). STUDYDESIGN:
Standardized cavities were done on the coronal third of 40 single-rooted teeth and assigned into 4 groups according to the treatment applied (1) untreated control, (2) use of MTA, (3) irradiation with ErYAG laser (42 mJ, 10 Hz, 10 s), and (4) irradiation with high-power diode laser (1 W, 10 s). Fragments were prepared for SEManalysis:
6 samples of each group were plated with human gingival fibroblasts and 4 samples were used for ultrastructural analysis.RESULTS:
The cells' attachment was in decreasing order G3 > G4 > G1> G2, with statistical differences among all groups (P < .05). The samples irradiated with ErYAG exhibited roughness on the dentinal surface, no smear layer, and open dentinal tubules; those irradiated with diode laser exhibited a smooth surface, more smear layer, and closed dentinal tubules; and the control group showed high amount of smear layer and closed dentin tubules.CONCLUSIONS:
Irradiation with ErYAG and diode lasers caused morphologic changes on the dentinal surfaces of simulated resorptions that favored cells' adhesion. MTA showed lower biocompatibility than irradiated groups but allowed cells' adhesion.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Materiales de Obturación del Conducto Radicular
/
Resorción Radicular
/
Adhesión Celular
/
Dentina
/
Láseres de Semiconductores
/
Láseres de Estado Sólido
Límite:
Humans
Idioma:
En
Revista:
Oral Surg Oral Med Oral Pathol Oral Radiol Endod
Asunto de la revista:
ODONTOLOGIA
Año:
2010
Tipo del documento:
Article
País de afiliación:
Brasil