Student Research Committee, Babol University of Medical Sciences, Babol, Iran.
Dental Materials Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran.
Clin Exp Dent Res. 2024 Oct;10(5):e930. doi: 10.1002/cre2.930.
The demand for esthetics has increased in today's world and most parents prefer to preserve their children's primary anterior teeth until their natural exfoliation. However, an intracanal post is required to provide retention for reconstruction of severely damaged anterior teeth due to caries or trauma. Various materials and methods may be used for the fabrication of intracanal posts. This study assessed the fracture strength and fracture mode of primary canine teeth reconstructed with prefabricated and customized polyethylene and glass fiber posts.
This in vitro study evaluated 60 extracted primary canine teeth in four groups (n = 15). After pulpectomy and post space preparation with 4 mm depth, composite resin post, prefabricated glass fiber post (Whitepost), customized glass fiber post (Interlig), or customized polyethylene fiber post (Ribbond) were placed in the root canals to provide retention, and the tooth crown was restored with bulk-fill composite resin. The fracture strength was then measured in a universal testing machine. The fracture mode was also evaluated visually.
The mean fracture strength was 22.45 ± 5.06, 33.10 ± 8.5, 30.20 ± 7.33, and 32.61 ± 5.73 N/mm in the composite resin post, Whitepost, Interlig, and Ribbond groups, respectively. The fracture strength was significantly lower in the composite group than in the remaining three groups (p = 0.000). No other significant differences were found (p > 0.05). Also, no significant difference was observed among the study groups in the fracture mode (p = 0.241).
The composite resin post yielded a significantly lower fracture strength than the prefabricated and customized glass and polyethylene fiber posts, but the fracture mode was not significantly different among the four groups.
在当今世界，人们对美学的需求增加了，大多数父母更愿意保留孩子的乳前牙，直到其自然脱落。然而，由于龋病或外伤，严重受损的前牙需要根管内桩来提供固位。可使用各种材料和方法来制作根管内桩。本研究评估了预成和定制聚乙稀纤维桩和玻璃纤维桩修复乳前牙的断裂强度和断裂模式。
本体外研究评估了 60 颗离体乳切牙，分为 4 组（n=15）。牙髓切除和根管预备至 4mm 深度后，分别在根管内放置复合树脂桩、预成玻璃纤维桩（Whitepost）、定制玻璃纤维桩（Interlig）或定制聚乙稀纤维桩（Ribbond）以提供固位，然后用块状充填复合树脂修复牙冠。随后在万能试验机上测量断裂强度。通过肉眼观察评估断裂模式。
复合树脂桩、Whitepost、Interlig 和 Ribbond 组的平均断裂强度分别为 22.45±5.06、33.10±8.5、30.20±7.33 和 32.61±5.73 N/mm。复合树脂组的断裂强度明显低于其余三组（p=0.000）。其他组间无显著差异（p>0.05）。研究组间的断裂模式也无显著差异（p=0.241）。
复合树脂桩的断裂强度明显低于预成和定制玻璃纤维桩和聚乙稀纤维桩，但 4 组间的断裂模式无显著差异。
