Influence of marginal fit and cement types on microleakage of all-ceramic crown systems
Braz. oral res
;
25(3): 261-266, May-June 2011. graf, tab
Artigo
em Inglês
| LILACS
| ID: lil-590045
ABSTRACT
The purpose of this study was to evaluate the effects of both marginal fit and cementing with different luting agents on the microleakage of all-ceramic crown systems. Thirty-six extracted upper central incisors were prepared for full-coverage crowns and were divided into three groups. Group 1 CAD/CAM-fabricated ZrO2, Group 2 Heat-pressed lithium-disilicate, and Group 3 Cast Cr-Co copings as the control group. Copings were made following standard techniques, and groups were assigned cementation with either self-adhesive resin cement (A) or glass-ionomer luting cement (B). The specimens were subjected to thermocycling, immersed in basic fuchsin solution, sectioned mesiodistally and buccolingually. The surface of each section was digitally photographed under a stereomicroscope. Microleakage was scored using a five-point scale, and the marginal gap was measured using image analysis software. Data were statistically analyzed using 2-way ANOVA, Kruskal-Wallis, and Mann-Whitney U tests (α 0.05). The marginal discrepancy of each group was 82.7 ± 7 µm, 92.6 ± 4 µm and 96.5 ± 7 µm respectively. Group 1 showed significantly smaller gaps than Group 3 (P = 0.042). Self-adhesive resin cement (A) showed a lower level of microleakage than glass-ionomer luting cement (B) in all groups (P = 0.029). Microleakage scores of '0' were 83 percent for 1A, 50 percent for 1B, 50 percent for 2A, 16 percent for 2B, 33 percent for 3A and none for 3B. Marginal discrepancy and cement type both had significant effects on microleakage. Lower levels of microleakage were recorded with self-adhesive resin cement, while CAD/CAM-fabricated ZrO2 copings showed smaller marginal discrepancy and less microleakage in comparison to cast Cr-Co.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Cerâmica
/
Adaptação Marginal Dentária
/
Coroas
/
Cimentos Dentários
/
Infiltração Dentária
Tipo de estudo:
Estudos de avaliação
Idioma:
Inglês
Revista:
Braz. oral res
Assunto da revista:
Odontologia
Ano de publicação:
2011
Tipo de documento:
Artigo
País de afiliação:
Turquia
Instituição/País de afiliação:
Ankara University/TR
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