Department of Pediatric Dentistry, School of Dentistry, Qazvin University of Medical Sciences.
Department of Dental Biomaterials, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
Eur J Paediatr Dent. 2014 Sep;15(3):313-6.
This in vitro study aimed to test the fracture resistance of 4 different posts used in the restoration of severely decayed primary incisors.
Fifty primary incisors were selected for this study and sectioned 1 mm above the CEJ. After filing and irrigation of the root canal space, the canals were obturated with Metapex and 3 mm of post space was prepared inside the canals. Intact glass fiber posts, split-ended glass fiber posts, composite resin posts, and orthodontic γ 'gamma' wire posts were used as intracanal posts and the final composite resin restoration was placed using a paediatric strip crown. After thermocycling of the specimens, the fracture resistance was measured using a universal testing machine.
The mean fracture resistance of split- ended glass fiber posts was higher than the other groups, however, there was no significant difference between any of the groups (P>0.05).
Split-ended glass fiber posts seem to be a more appropriate option for full coverage restorations in primary incisors.
本体外研究旨在测试 4 种不同的桩在修复严重龋坏的乳切牙中的抗折能力。
本研究选择了 50 颗乳切牙，在牙颈下 1 毫米处进行截冠。根管预备后，使用 Metapex 填充根管，在根管内预备 3 毫米的桩腔。使用完整的玻璃纤维桩、分叉玻璃纤维桩、复合树脂桩和正畸γ'γ'线桩作为根管内桩，最后使用儿童带状冠进行复合树脂修复。对样本进行冷热循环后，使用万能试验机测量抗折强度。
分叉玻璃纤维桩的平均抗折强度高于其他组，但组间无显著性差异（P>0.05）。
分叉玻璃纤维桩似乎是乳切牙全冠修复的更合适选择。
