Effects of a new desensitizing paste containing 8% arginine and calcium carbonate on the shear bond strength of orthodontic brackets.
10.4041/kjod.2011.41.2.121
- Author:
Ahmet YAGCI
1
;
Tancan UYSAL
;
Hatice AKINCI
;
Banu UYSAL
Author Information
1. Department of Orthodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
- Publication Type:Original Article ; Randomized Controlled Trial
- Keywords:
Dentin desensitizing agents;
Orthodontic brackets;
Shear strength
- MeSH:
Adhesives;
Arginine;
Bicuspid;
Calcium;
Calcium Carbonate;
Collodion;
Dental Enamel;
Dentin Desensitizing Agents;
Humans;
Light;
New York;
Orthodontic Brackets;
Saliva, Artificial;
Shear Strength;
Tooth
- From:Korean Journal of Orthodontics
2011;41(2):121-126
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: The purpose of this study was to evaluate shear bond strength (SBS) and failure site location of brackets bonded to enamel with or without desensitizer application. METHODS: Sixty-six freshly extracted human premolar teeth were randomly divided into 3 groups of 22. Group 1 served as the control. Desensitizer was applied to the remaining teeth at two time intervals (Group 2, bonded immediately after Pro-Relief(TM) (Colgate-Palmolive Co., New York, NY, USA) application and Group 3, bonded 30 days after Pro-Relief(TM) application with the teeth stored in artificial saliva during the 30 days). Orthodontic brackets were bonded with a light cure composite resin and cured with a halogen light. After bonding, the SBS of the brackets was tested using a universal testing device. Adhesive remnant index (ARI) scores were determined after the brackets failed. Data were analyzed with analysis of variance, Tukey's HSD, and G tests. RESULTS: The SBS was significantly lower in Group 2 than in Groups 1 (p = 0.024) and 3 (p = 0.017). Groups 1 and Group 3 did not differ (p = 0.991). ARI scores did not differ significantly among groups. CONCLUSIONS: The Pro-Relief(TM) desensitizer agent applied immediately before bonding significantly reduces bond strength, but the SBS values still exceed the minimum 5.9 - 7.8 MPa required for adequate clinical performance. Immersing the teeth in artificial saliva for 30 days after applying the Pro-Relief(TM) desensitizer agent and before bonding increased the SBS to control levels.
