Influence of size and insertion depth of irrigation needle on debris extrusion and sealer penetration
Uzunoglu-Ozyurek Emel, Karaaslan Hakan, Turker Sevinc Aktemur, Ozcelik Bahar,
소속 상세정보
( Uzunoglu-Ozyurek Emel ) - Hacettepe University Faculty of Dentistry Department of Endodontics
( Karaaslan Hakan ) - Hacettepe University Faculty of Dentistry Department of Endodontics
( Turker Sevinc Aktemur ) - Bulent Ecevit University Faculty of Dentistry Department of Endodontics
( Ozcelik Bahar ) - Hacettepe University Faculty of Dentistry Department of Endodontics
Abstract
Objectives: To determine the effect of size and insertion depth of irrigation needle on the amount of apical extruded debris and the amount of penetration depth of sealer using a confocal laser scanning microscope (CLSM).
Materials and Methods: Twenty maxillary premolars were assigned to 2 groups (n = 10), according to the size of needle tip, 28 G or 30 G. Buccal roots of samples were irrigated with respective needle type inserted 1 mm short of the working length (WL), while palatal roots were irrigated with respective needle type inserted 3 mm short of the WL. Prepared teeth were removed from the pre-weighed Eppendorf tubes. Canals were filled with F3 gutta-percha cone and rhodamine B dye-labeled AH 26 sealer. Teeth were transversally sectioned at 1 and 3 mm levels from the apex and observed under a CLSM. Eppendorf tubes were incubated to evaporate the irrigant and were weighed again. The difference between pre- and post-weights was calculated, and statistical evaluation was performed.
Results: Inserting needles closer to the apex and using needles with wider diameters were associated with significantly more debris extrusion (p < 0.05). The position of needles and level of sections had statistically significant effects on sealer penetration depth (p < 0.05 for both).
Conclusions: Following preparation, inserting narrower needles compatible with the final apical diameter of the prepared root canal at 3 mm short of WL during final irrigation might prevent debris extrusion and improve sealer penetration in the apical third.
키워드
Confocal microscopy; Needles; Root canal; Tooth apex
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