Retention of fiber posts in different dentin regions: an in vitro study.
OBJECTIVE
The aim of this study was to evaluate the influence of different regions of dentin within the post space on the retention of fiber posts.


METHODS
Ten human incisors with straight roots were selected for this study. Endodontic treatment of the specimens was done. The post spaces were created immediately after obturation and the posts were luted with dual-cure resin cement. Approximately 2.5-mm-thick sections were made from the coronal, middle, and apical thirds of the post space and thus we had three groups: Group I: Cervical, Group II: Middle, Group III: Apical. The specimens were tested on a universal testing machine. Statistical analysis was done using the unpaired Student's t-test and one-way ANOVA test.


RESULTS
The best push-out strength was obtained with the apical sections (14.69 ± 0.298 MPa), followed by the middle (10.66 ± 0.34 MPa) and cervical sections (9.73 ± 0.42 MPa).


CONCLUSIONS
highest pust out strengths were obtained in apical sections followed by middle and coronal.
Department of Conservative Dentistry and Endodontics, Subharti Dental College, Meerut, Uttar Pradesh, India.
Padmanabh
P
Jha
Mesha
M
Jha
D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding / Q000379:methods; D017268:Dental Prosthesis Retention; D003786:Dental Pulp Cavity / Q000648:ultrastructure*; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000648:ultrastructure*; D004853:Epoxy Resins / Q000627:therapeutic use; D005898:Glass / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry; D006171:Gutta-Percha / Q000627:therapeutic use; D006801:Humans; D007180:Incisor / Q000648:ultrastructure; D008422:Materials Testing; D011176:Post and Core Technique / Q000295:instrumentation*; D012387:Root Canal Filling Materials / Q000627:therapeutic use; D012389:Root Canal Obturation / Q000379:methods; D018915:Root Canal Preparation / Q000379:methods; D055116:Self-Curing of Dental Resins; D013314:Stress, Mechanical; D019227:Tooth Apex / Q000648:ultrastructure; D014092:Tooth Root / Q000648:ultrastructure
D003188:Composite Resins; D004853:Epoxy Resins; D005899:Glass Ionomer Cements; D012387:Root Canal Filling Materials; C084550:Vitremer; C534916:epoxy resin-based root canal sealer; C009753:fiberglass; D006171:Gutta-Percha