Push-out bond strength and SEM evaluation of new polymeric root canal fillings.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod
; 107(6): 879-85, 2009 Jun.
Article
en En
| MEDLINE
| ID: mdl-19386522
ABSTRACT
OBJECTIVE:
The objective of this study was to compare the interfacial strengths and failure modes of new polymeric endodontic obturation systems consisting of different material combinations. STUDYDESIGN:
Extracted human single-rooted teeth (n = 105) were instrumented using HERO Shaper rotary instruments and obturated with different combinations of core and sealer as follows group 1, RealSeal/Resilon; group 2, RealSeal/Herofill; group 3, Hybrid Root Seal/Resilon; group 4, Hybrid Root Seal/Herofill; group 5, MM-Seal/Resilon; group 6, MM-Seal/Herofill; group 7 (control). Failure modes of root slices (1.00 +/- 0.05-mm thick) after push-out testing were examined with stereomicroscope and scanning electron microscopy.RESULTS:
Hybrid Root Seal/Resilon combination had significantly greater bond strength than all the other groups (P < .001); RealSeal/Resilon combination proved to have the second highest bond strength (P < .001). Bond failure was mainly mixed failure in both adhesive and cohesive modes at the dentin/sealer interface.CONCLUSION:
The push-out bond strengths of methacrylate-based sealers (Hybrid Root Seal and RealSeal) and thermoplastic synthetic-polymer-based core material (Resilon) combinations were higher than epoxy-resin-based sealer (MM-Seal) and gutta-percha (Herofill) combination.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Materiales de Obturación del Conducto Radicular
/
Obturación del Conducto Radicular
/
Recubrimiento Dental Adhesivo
/
Resinas Compuestas
Límite:
Humans
Idioma:
En
Revista:
Oral Surg Oral Med Oral Pathol Oral Radiol Endod
Asunto de la revista:
ODONTOLOGIA
Año:
2009
Tipo del documento:
Article
País de afiliación:
Turquía