The effects of short-term application of calcium hydroxide on dentin fracture strength.
10.5395/JKACD.2011.36.5.425
- Author:
Eun Jung SHIN
1
;
Yeong Joon PARK
;
Bin Na LEE
;
Ji Hyun JANG
;
Hoon Sang CHANG
;
In Nam HWANG
;
Won Mann OH
;
Yun Chan HWANG
Author Information
1. Chonnam National University School of dentistry, Gwangju, Korea.
- Publication Type:In Vitro ; Original Article
- Keywords:
Calcium hydroxide;
Dentin;
Fracture strength;
Short term application
- MeSH:
Bicuspid;
Calcium;
Calcium Hydroxide;
Calcium Sulfate;
Dental Cements;
Dental Pulp Cavity;
Dentin;
Hand;
Humans;
Hydrazines;
Hydroxides;
Root Canal Filling Materials;
Tooth;
Vinyl Compounds;
Zinc Oxide
- From:Journal of Korean Academy of Conservative Dentistry
2011;36(5):425-430
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVES: This in vitro study investigated whether short-term application of calcium hydroxide in the root canal system for 1 and 4 wk affects the fracture strength of human permanent teeth. MATERIALS AND METHODS: Thirty two mature human single rooted mandibular premolars in similar size and dentin thickness without decay or restorations were hand and rotary instrumented and 16 teeth vertically packed with calcium hydroxide paste and sealed coronally with caviton to imitate the endodontic procedure and the other 16 teeth was left empty as a control group. The apicies of all the samples were sealed with resin, submerged in normal saline and put in a storage box at 37degrees C to mimic the oral environment. After 1 and 4 wk, 8 samples out of 16 samples from each group were removed from the storage box and fracture strength test was performed. The maximum load required to fracture the samples was recorded and data were analysed statistically by the two way ANOVA test at 5% significance level. RESULTS: The mean fracture strengths of two groups after 1 wk and 4 wk were similar. The intracanal placement of calcium hydroxide weakened the fracture strength of teeth by 8.2% after 4 wk: an average of 39.23 MPa for no treatment group and 36.01 MPa for CH group. However there was no statistically significant difference between experimental groups and between time intervals. CONCLUSIONS: These results suggest that short term calcium hydroxide application is available during endodontic treatment.
