Cutting efficiency of apical preparation using ultrasonic tips with microprojections: confocal laser scanning microscopy study
Restorative Dentistry & Endodontics
;
: 276-281, 2014.
Article
in English
| WPRIM
| ID: wpr-92620
ABSTRACT
OBJECTIVES:
The purpose of this study was to compare the cutting efficiency of a newly developed microprojection tip and a diamond-coated tip under two different engine powers. MATERIALS ANDMETHODS:
The apical 3-mm of each root was resected, and root-end preparation was performed with upward and downward pressure using one of the ultrasonic tips, KIS-1D (Obtura Spartan) or JT-5B (B&L Biotech Ltd.). The ultrasonic engine was set to power-1 or -4. Forty teeth were randomly divided into four groups K1 (KIS-1D / Power-1), J1 (JT-5B / Power-1), K4 (KIS-1D / Power-4), and J4 (JT-5B / Power-4). The total time required for root-end preparation was recorded. All teeth were resected and the apical parts were evaluated for the number and length of cracks using a confocal scanning micrscope. The size of the root-end cavity and the width of the remaining dentin were recorded. The data were statistically analyzed using two-way analysis of variance and a Mann-Whitney test.RESULTS:
There was no significant difference in the time required between the instrument groups, but the power-4 groups showed reduced preparation time for both instrument groups (p < 0.05). The K4 and J4 groups with a power-4 showed a significantly higher crack formation and a longer crack irrespective of the instruments. There was no significant difference in the remaining dentin thickness or any of the parameters after preparation.CONCLUSIONS:
Ultrasonic tips with microprojections would be an option to substitute for the conventional ultrasonic tips with a diamond coating with the same clinical efficiency.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Tooth
/
Ultrasonics
/
Diamond
/
Microscopy, Confocal
/
Dentin
Language:
English
Journal:
Restorative Dentistry & Endodontics
Year:
2014
Type:
Article
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