Effects of condensation techniques and canal sizes on the microleakage of orthograde MTA apical plug in simulated canals.
10.5395/JKACD.2009.34.3.208
- Author:
Deuk Lim NAM
1
;
Jeong Kil PARK
;
Bock HUR
;
Hyeon Cheol KIM
Author Information
1. Department of Conservative Dentistry, School of Dentistry, Pusan National University, Busan, Korea. golddent@pusan.ac.kr
- Publication Type:Original Article
- Keywords:
MTA;
apical plug;
orthograde placement;
hand condensation;
ultrasonic
- MeSH:
Glutamates;
Guanine;
Hand;
Humidity;
Rhodamines;
Root Canal Filling Materials;
Ultrasonics;
Pemetrexed
- From:Journal of Korean Academy of Conservative Dentistry
2009;34(3):208-214
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The purpose of this study was to compare the dye leakage of MTA (mineral trioxide aggregate) apical plug produced by two orthograde placement techniques (hand condensation technique and ultrasonically assisted hand condensation technique). To simulate straight canal, 60 transparent acrylic blocks with straight canal were fabricated. These transparent acrylic blocks were divided into 2 groups (Group C; hand condensation technique (HC) and Group U; ultrasonically assisted hand condensation technique (UAHC)) of 30 blocks with each MTA application method. Each group was divided into 2 subgroups (n = 15) with different canal size of #70 (subgroup C70 and subgroup U70) and #120 (subgroup C120 and subgroup U120). After apical plug was created, a wet paper point was placed over the MTA plug and specimen was kept in a humid condition at room temperature to allow MTA to set. After 24 hours, remaining canal space was backfilled using Obtura II. All specimens were transferred to floral form socked by 0.2% rhodamine B solution and stored in 100% humidity at room temperature. After 48 hours, resin block specimens were washed and scanned using a scanner. The maximum length of microleakage was measured from the scanned images of four surfaces of each resin block using Photoshop 6.0. Statistical analysis was performed with Mann-Whitney U test. Group U of UAHC had significantly lower leakage than Group C of HC in #70-size canal (subgroup U70) (p < 0.05).
