Gab Gulerana, Rao B Dinesh, Panwar Sunil, Narula Harleen
Department of Paediatric and Preventive Dentistry, Pacific Dental College and Hospital, Udaipur, Rajasthan, India.
J Indian Soc Pedod Prev Dent. 2020 Jul-Sep;38(3):253-258. doi: 10.4103/JISPPD.JISPPD_138_20.
In cases where there is an extensive loss of crown structure, these treatments require intracanal posts placement for retention as occlusal forces make the tooth structure weak and prone to fracture. Thus, restoration of primary anterior teeth, followed by post placement and cementation with pediatric zirconia crowns helps withstand masticatory forces to a greater extent.
This in vitro study evaluates the compressive strength of two different post systems in the primary anterior teeth, restored with pediatric zirconia crowns.
The present study was an in vitro, experimental, comparative study, with a study sample selected using a convenience sampling method. Forty-five primary anterior teeth were obturated and restored with enhanced omega-shaped loop and reinforced glass-fiber posts were cemented with pediatric zirconia crowns. The compressive strength and the type of fracture were evaluated for each group.
This study demonstrated that the glass-fiber posts had a higher compressive strength, although omega-shaped posts showed a higher presence of favorable fracture.
Retentive omega-shaped loops and reinforced glass-fiber posts were both capable of withstanding high fracture loads. The addition of cemented pediatric zirconia crown on decayed primary anterior teeth restored with post systems helped withstand the load to a greater extent.
在牙冠结构大量丧失的情况下，由于咬合力量会使牙齿结构变弱且易于折断，这些治疗需要在根管内放置桩以增强固位。因此，先用儿童氧化锆全冠修复乳前牙，再进行桩的放置和粘结，有助于在更大程度上承受咀嚼力。
本体外研究评估了用儿童氧化锆全冠修复的乳前牙中两种不同桩系统的抗压强度。
本研究为体外实验性对比研究，采用便利抽样法选取研究样本。45颗乳前牙进行根管充填，用改良欧米伽形环和增强型玻璃纤维桩修复，并用儿童氧化锆全冠粘结。对每组的抗压强度和骨折类型进行评估。
本研究表明，玻璃纤维桩具有更高的抗压强度，尽管欧米伽形桩出现有利骨折的比例更高。
固位用欧米伽形环和增强型玻璃纤维桩都能够承受高骨折负荷。在用桩系统修复的龋坏乳前牙上粘结儿童氧化锆全冠有助于在更大程度上承受负荷。
