Retentive strength of different intracanal posts in restorations of anterior primary teeth: an in vitro study.
10.5395/rde.2013.38.4.215
- Author:
Mahtab MEMARPOUR
1
;
Fereshteh SHAFIEI
;
Maryam ABBASZADEH
Author Information
1. Oral and Dental Health Care Research Center, Department of Pediatric Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
- Publication Type:In Vitro ; Original Article
- Keywords:
Dental restoration;
Fiber posts;
Primary teeth;
Resin cement
- MeSH:
Adhesives;
Composite Resins;
Crowns;
Cuspid;
Dental Cements;
Dental Pulp Cavity;
Glass;
Polyethylene;
Resin Cements;
Tooth;
Tooth, Deciduous*
- From:Restorative Dentistry & Endodontics
2013;38(4):215-221
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVES: To determine the retentive strength and failure mode of undercut composite post, glass fiber post and polyethylene fiber post luted with flowable composite resin and resin-cement. MATERIALS AND METHODS: Coronal parts of 120 primary canine teeth were sectioned and specimens were treated endodontically. The teeth were randomly divided into 6 groups (n = 20). Prepared root canals received intracanal retainers with a short composite post, undercut composite post, glass fiber post luted with flowable resin or resin-cement, and polyethylene fiber post luted with flowable resin or resin-cement. After crown reconstruction, samples were tested for retentive strength and failure mode. Statistical analysis was done with one-way ANOVA and Tukey tests (p < 0.05). RESULTS: There were statistically significant differences between groups (p = 0.001). Mean bond strength in the undercut group was significantly greater than in the short composite post (p = 0.030), and the glass fiber post (p = 0.001) and the polyethylene fiber post group luted with resin-cement (p = 0.008). However, the differences between the undercut group and the groups with flowable composite as the luting agent were not significant (p = 0.068, p = 0.557). Adhesive failure was more frequent in the fiber post groups. CONCLUSIONS: Although the composite post with undercutting showed the greatest resistance to dislodgement, fiber posts cemented with flowable composite resin provided acceptable results in terms of retentive strength and fracture mode.
