Secil Ozkan Ata, Canan Akay, Emre Mumcu, Nazim Ata
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引用次数: 2
Abstract
Introduction: The purpose of this study was to investigate the dentin bond strength of composite resins in response to environmental pressure changes.
Methods: Ninety extracted human molar teeth were used. A mould (3 mm x 4 mm) was adapted on dentin, resin composites (conventional [n = 30] and single-shade composites [Ohmnicroma] [n = 30]) were filled in two increments of 2 mm. The bulk-fill composites (n = 30) were filled with one 4 mm increment. The specimens were stored for 30 days in artificial saliva. The specimens were exposed to hyperbaric pressure (283.6 kPa; 2.8 atmospheres absolute [atm abs]) or hypobaric pressure (34.4 kPa; 0.34 atm abs) once daily for 30 days and the control group was stored at atmospheric pressure for 30 days. The bond strength was tested with a universal testing machine and the failures were examined with a stereomicroscope and scanning electron microscope. Statistical analyses were performed using analysis of variance with post hoc tests, and the Weibull analysis.
Results: Regardless of environmental pressure changes, the bulk-fill composites showed the highest bond strength. There was no significant difference in bond strength between the hypobaric and atmospheric pressure (control) groups after 30 days in all resins. The hyperbaric group showed lower bond strength for bulk-fill composites than the control group.
Conclusions: Dentists experienced in diving and aviation medicine should definitely take part in the initial and periodic medical examinations of divers and aircrew to give appropriate treatment. Bulk-fill composite resins can be preferred in divers and aircrew due to high bond strength values.
引言：本研究旨在研究复合树脂在环境压力变化下的牙本质结合强度。方法：选用90颗拔除的人类磨牙。在牙本质上使用模具（3 mm x 4 mm），树脂复合材料（常规[n=30]和单一阴影复合材料[Ohmnicroma][n=30]）以2 mm的两个增量填充。大块填充复合材料（n=30）以一个4 mm的增量填充。标本在人工唾液中保存30天。将标本暴露于高压（283.6kPa；2.8个大气压绝对值[atm-abs]）或低压（34.4kPa；0.34atm abs）下，每天一次，持续30天，对照组在大气压下储存30天。用万能试验机测试粘结强度，用立体显微镜和扫描电子显微镜检查失效情况。采用事后检验方差分析和威布尔分析进行统计分析。结果：无论环境压力如何变化，块体填充复合材料都表现出最高的粘结强度。在所有树脂中，减压组和大气压组（对照组）在30天后的结合强度没有显著差异。高压组的大块填充复合材料的结合强度低于对照组。结论：有潜水和航空医学经验的牙医一定要参加潜水员和机组人员的初步和定期体检，以给予适当的治疗。散装填充复合树脂由于具有较高的粘结强度值，因此可优先用于潜水员和机组人员。
期刊介绍：
Diving and Hyperbaric Medicine (DHM) is the combined journal of the South Pacific Underwater Medicine Society (SPUMS) and the European Underwater and Baromedical Society (EUBS). It seeks to publish papers of high quality on all aspects of diving and hyperbaric medicine of interest to diving medical professionals, physicians of all specialties, scientists, members of the diving and hyperbaric industries, and divers. Manuscripts must be offered exclusively to Diving and Hyperbaric Medicine, unless clearly authenticated copyright exemption accompaniesthe manuscript. All manuscripts will be subject to peer review. Accepted contributions will also be subject to editing.
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