Evaluation of three instrumentation techniques at the precision of apical stop and apical sealing of obturation
J. appl. oral sci
;
19(4): 350-354, July-Aug. 2011. ilus, tab
Article
in English
| LILACS
| ID: lil-599757
ABSTRACT
OBJECTIVE: The aim of this study was to investigate the ability of two NiTi rotary apical preparation techniques used with an electronic apex locator-integrated endodontic motor and a manual technique to create an apical stop at a predetermined level (0.5 mm short of the apical foramen) in teeth with disrupted apical constriction, and to evaluate microleakage following obturation in such prepared teeth. MATERIAL AND METHODS: 85 intact human mandibular permanent incisors with single root canal were accessed and the apical constriction was disrupted using a #25 K-file. The teeth were embedded in alginate and instrumented to #40 using rotary Lightspeed or S-Apex techniques or stainless-steel K-files. Distance between the apical foramen and the created apical stop was measured to an accuracy of 0.01 mm. In another set of instrumented teeth, root canals were obturated using gutta-percha and sealer, and leakage was tested at 1 week and 3 months using a fluid filtration device. RESULTS: All techniques performed slightly short of the predetermined level. Closest preparation to the predetermined level was with the manual technique and the farthest was with S-Apex. A significant difference was found between the performances of these two techniques (p<0.05). Lightspeed ranked in between. Leakage was similar for all techniques at either period. However, all groups leaked significantly more at 3 months compared to 1 week (p<0.05). CONCLUSIONS: Despite statistically significant differences found among the techniques, deviations from the predetermined level were small and clinically acceptable for all techniques. Leakage following obturation was comparable in all groups.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Root Canal Obturation
/
Root Canal Preparation
/
Tooth Apex
/
Dental Instruments
/
Dental Leakage
/
Odontometry
Type of study:
Evaluation studies
/
Practice guideline
Limits:
Humans
Language:
English
Journal:
J. appl. oral sci
Journal subject:
Dentistry
Year:
2011
Type:
Article
Affiliation country:
Turkey
Institution/Affiliation country:
Gazi University/TR
/
Yüzüncü Yıl University/TR
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