A comparative study on radiopacity of canal filling and retrograde root-end filling materials.
10.5395/JKACD.2008.33.2.107
- Author:
Yong Sang KIM
1
;
Seo Kyong KIM
;
Yun Chan HWANG
;
In Nam HWANG
;
Won Mann OH
Author Information
1. Department of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University, BK21, Korea. wmoh@chonnam.ac.kr
- Publication Type:Comparative Study ; Original Article
- Keywords:
Radiopacity;
Aluminum step wedge;
Canal filling;
Retrograde root-end filling materials
- MeSH:
Aluminum;
Compomers;
Dentin;
Glass Ionomer Cements;
Gutta-Percha;
Resins, Synthetic;
Root Canal Obturation
- From:Journal of Korean Academy of Conservative Dentistry
2008;33(2):107-114
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
This study was performed to assess the radiopacity of a variety of canal filling and retrograde root-end filling materials according to the specification concerning root canal obturation materials. Ten materials including Gutta-percha pellets, amalgam, Fuji II LC, Dyract(R) AP, Super EBA(R), IRM(R), AH 26(R), Sealapex(TM), Tubli-Seal(TM) and dentin were evaluated in this study. In the first part, densitometric reading of an each step of aluminum step wedge on occlusal film were performed at 60 kVp (0.2, 0.3, 0.4 s), 70 kVp (0.2, 0.3, 0.33 s) to decide appropriate voltage and exposure time. In the second part, ten specimens which are 5 mm in diameter and 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 mm in thickness, were fabricated from each material studied. The specimens were radiographed simultaneously with an aluminum step wedge under decided condition (60 kVp, 0.2 s). The mean radiographic density values of the materials were transformed into radiopacity expressed equivalent thickness of aluminum (mm Al). The following results were obtained. 1. Among the various conditions including 0.2 s, 0.3 s, 0.4 s at 60 kVp and 0.2 s, 0.3 s, 0.33 s at 70 kVp, the appropriate voltage and exposure time that meet the requirement of density from 0.5 to 2.0 was 0.2 s at 60 kVp. 2. All of the materials in this study had greater radiopacity than the minimun level recommended by ISO No. 4049 standards. 3. Most of the materials had greater radiopacity than 3 mm Al requirement of ANSI/ADA specification No. 57 (2000) and ISO No. 6876 (2001) standards except for Fuji II LC and Dyract. It suggests that all experimental canal filling and retrograde root-end filling materials have a sufficient radiopacity that meet the requirement concerning root canal obturation materials except for Fuji II LC and Dyract.
