Comparison among four commonly used demineralizing agents for root conditioning: a scanning electron microscopy
J. appl. oral sci
;
19(5): 469-475, Sept.-Oct. 2011. ilus, tab
Artículo
en Inglés
| LILACS
| ID: lil-600847
ABSTRACT
Dental roots that have been exposed to the oral cavity and periodontal pocket environment present superficial changes, which can prevent connective tissue reattachment. Demineralizing agents have been used as an adjunct to the periodontal treatment aiming at restoring the biocompatibility of roots. OBJECTIVE:
This study compared four commonly used demineralizing agents for their capacity of removing smear layer and opening dentin tubules.METHODS:
Fifty fragments of human dental roots previously exposed to periodontal disease were scaled and randomly divided into the following groups of treatment 1) CA demineralization with citric acid for 3 min; 2) TC-HCl demineralization with tetracycline-HCl for 3 min; 3) EDTA demineralization with EDTA for 3 min; 4) PA demineralization with 37 percent phosphoric acid for 3 min; 5) Control rubbing of saline solution for 3 min. Scanning electron microscopy was used to check for the presence of residual smear layer and for measuring the number and area of exposed dentin tubules.RESULTS:
Smear layer was present in 100 percent of the specimens from the groups PA and control; in 80 percent from EDTA group; in 33.3 percent from TC-HCl group and 0 percent from CA group. The mean numbers of exposed dentin tubules in a standardized area were TC-HCl=43.8±25.2; CA=39.3±37; PA=12.1±16.3; EDTA=4.4±7.5 and Control=2.3±5.7. The comparison showed significant differences between the following pairs of groups TC-HCl and Control; TC-HCl and EDTA; CA and Control; and CA and EDTA. The mean percentages of area occupied by exposed dentin tubules were CA=0.12±0.17 percent; TC-HCl=0.08±0.06 percent; PA=0.03±0.05 percent; EDTA=0.01±0.01 percent and Control=0±0 percent. The CA group differed significantly from the others except for the TC-HCl group.CONCLUSION:
There was a decreasing ability for smear layer removal and dentin tubule widening as follows AC>TC-HCl>PA>EDTA. This information can be of value as an extra parameter for choosing one of them for root conditioning.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Raíz del Diente
/
Grabado Ácido Dental
/
Capa de Barro Dentinario
/
Preparación de la Cavidad Dental
/
Dentina
Límite:
Humanos
Idioma:
Inglés
Revista:
J. appl. oral sci
Asunto de la revista:
Odontología
Año:
2011
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
University of São Paulo/BR
Similares
MEDLINE
...
LILACS
LIS