Micro-computed tomographic evaluation of single-cone obturation with three sealers
Zare Sahar, Shen Ivy, Zhu Qiang, 안철, Primus Carolyn, Komabayashi Takashi,
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( Zare Sahar ) - University of New England College of Dental Medicine
( Shen Ivy ) - University of New England College of Dental Medicine
( Zhu Qiang ) - University of Connecticut School of Dental Medicine Division of Endodontology
안철 ( Ahn Chul ) - University of Texas Southwestern Medical Center Department of Clinical Science
( Primus Carolyn ) - Augusta University Dental College of Georgia
( Komabayashi Takashi ) - University of New England College of Dental Medicine
Abstract
Objectives: This study used micro-computed tomography (μCT) to compare voids and interfaces in single-cone obturation among AH Plus, EndoSequence BC, and prototype surface pre-reacted glass ionomer (S-PRG) sealers and to determine the percentage of sealer contact at the dentin and gutta-percha (GP) interfaces.
Materials and Methods: Fifteen single-rooted human teeth were shaped using ProTaper NEXT size X5 rotary files using 2.5% NaOCl irrigation. Roots were obturated with a single-cone ProTaper NEXT GP point X5 with AH Plus, EndoSequence BC, or prototype S-PRG sealer (n = 5/group).
Results: The volumes of GP, sealer, and voids were measured in the region of 0?2, 2?4, 4?6, and 6?8 mm from the apex, using image analysis of sagittal μCT scans. GP volume percentages were: AH Plus (75.5%), EndoSequence BC (87.3%), and prototype S-PRG (94.4%). Sealer volume percentages were less: AH Plus (14.3%), EndoSequence BC (6.8%), and prototype S-PRG (4.6%). Void percentages were AH Plus (10.1%), EndoSequence BC (5.9%), and prototype S-PRG (1.0%). Dentin-sealer contact ratios of AH Plus, EndoSequence BC, and prototype S-PRG groups were 82.4% ± 6.8%, 71.6% ± 25.3%, and 70.2% ± 9.4%, respectively. GP-sealer contact ratios of AH Plus, EndoSequence BC, and prototype S-PRG groups were 65.6% ± 29.1%, 80.7% ± 25.8%, and 87.0% ± 8.6%, respectively.
Conclusions: Prototype S-PRG sealer created a low-void obturation, similar to EndoSequence BC sealer with similar dentin-sealer contact (> 70%) and GP-sealer contact (> 80%). Prototype S-PRG sealer presented comparable filling quality to EndoSequence BC sealer.
키워드
Endodontic sealer; X-ray Micro-CT; Tricalcium silicate; Epoxy resin; S-PRG prototype sealer
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