Bulk-Fill Composites: Effectiveness of Cure With Poly- and Monowave Curing Lights and Modes
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- JK Gan
- Ju-Ken Gan, BDS, National University of Singapore, Faculty of Dentistry, Singapore
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- AU Yap
- Adrian U. J. Yap, PhD, MSc, BDS, Grad Dip Psychotherapy, Ng Teng Fong General Hospital, Department of Dentistry, Singapore
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- JW Cheong
- Jia Wen Cheong, BDS, National University of Singapore, Faculty of Dentistry, Singapore
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- N Arista
- Niken Arista, BDS, National University of Singapore, Faculty of Dentistry, Singapore
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- CBK Tan
- Charles Beng Kai Tan, BDS, National University of Singapore, Faculty of Dentistry, Singapore
抄録
<jats:title>SUMMARY</jats:title> <jats:p>This study compared the effectiveness of cure of bulk-fill composites using polywave light-emitting diode (LED; with various curing modes), monowave LED, and conventional halogen curing lights. The bulk-fill composites evaluated were Tetric N-Ceram bulk-fill (TNC), which contained a novel germanium photoinitiator (Ivocerin), and Smart Dentin Replacement (SDR). The composites were placed into black polyvinyl molds with cylindrical recesses of 4-mm height and 3-mm diameter and photopolymerized as follows: Bluephase N Polywave High (NH), 1200 mW/cm2 (10 seconds); Bluephase N Polywave Low (NL), 650 mW/cm2 (18.5 seconds); Bluephase N Polywave soft-start (NS), 0-650 mW/cm2 (5 seconds) → 1200 mW/cm2 (10 seconds); Bluephase N Monowave (NM), 800 mW/cm2 (15 seconds); QHL75 (QH), 550 mW/cm2 (21.8 seconds). Total energy output was fixed at 12,000 mJ/cm2 for all lights/modes, with the exception of NS. The cured specimens were stored in a light-proof container at 37°C for 24 hours, and hardness (Knoop Hardness Number) of the top and bottom surfaces of the specimens was determined using a Knoop microhardness tester (n=6). Hardness data and bottom-to-top hardness ratios were subjected to statistical analysis using one-way analysis of variance/Scheffe's post hoc test at a significance level of 0.05. Hardness ratios ranged from 38.43% ± 5.19% to 49.25% ± 6.38% for TNC and 50.67% ± 1.54% to 67.62% ± 6.96% for SDR. For both bulk-fill composites, the highest hardness ratios were obtained with NM and lowest hardness ratios with NL. While no significant difference in hardness ratios was observed between curing lights/modes for TNC, the hardness ratio obtained with NM was significantly higher than the hardness ratio obtained for NL for SDR.</jats:p>
収録刊行物
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- Operative Dentistry
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Operative Dentistry 43 (2), 136-143, 2018-03-01
Operative Dentistry
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キーワード
詳細情報 詳細情報について
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- CRID
- 1360292619869620736
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- DOI
- 10.2341/16-304-l
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- ISSN
- 15592863
- 03617734
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- データソース種別
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- Crossref