Original article
English
Gujjar KR, Indushekar KR.
Department of Pedodontics, Faculty of Dentistry, AI-Arab Medical University, Benghazi, Libya. drragsBO@gmail.com
J Dent Child (Chic). 2010 Jan-Apr;77(1):17-24.
Abstract
Purpose: The management of mutilated primary incisors in early childhood caries is a clinical challenge and necessitates the use of intraradicular retention. This study’s purpose was to compare the retentive strength of 3 different types of posts in restoring broken primary incisors: (1) composite posts; (2) orthodontic “gamma” wire posts; and (3) glass fiber posts.
Methods: This vitro study was performed on 30 extracted human primary maxillary incisors. Samples were randomly divided into 3 groups of 10 each: group 1 (composite posts and composite core); group 2 (orthodontic “gamma” wire posts and composite core); and group 3 (glass fiber posts and composite core). Mounted specimens were subjected for tensile strength on an Instron testing machine. The values were statistically analyzed.
Results: Mean tensile strength values for glass fiber posts was 5.89+/-0.66 kg force, followed by 4.46+/-0.82 and 3.56+/-0.53 kg force for orthodontic wire posts and composite posts, respectively, with a statistically significant difference between and within the groups (P<.01). Groups 1 and 2 showed more bulk cohesive failure and less adhesive bond failure. Group 3 showed only adhesive bond failure.
Conclusion: Glass fiber posts showed greater dislodging strength, followed by orthodontic "gamma" wire posts and, least of all, composite posts.
Keywords: DENTAL MATERIALS/BIOMATERIALS; INFANT ORAL HEALTH; RESTORATIVE DENTISTRY
Link/DOI: http://www.ingentaconnect.com/content/aapd/jodc/2010/00000077/00000001/art00004?token=00511f90af319549277ceb96720297d76342570237b607a407b2d7c4b6d3f6a4b6e4e395e4e6b6331