Aminabadi Naser Asl, Farahani Ramin Mostofi Zadeh
Department of Pediatric Dentistry, Tabriz University of Medical Sciences, School of Dentistry, Tabriz, Iran.
J Clin Pediatr Dent. 2009 Summer;33(4):283-8. doi: 10.17796/jcpd.33.4.p8m168x8784719h3.
The restoration of the severely damaged anterior teeth is considered a serious challenge in contemporary dental practice. The aim of the present study was the clinical and radiographic evaluation of a modified omega loop technique for the restoration of the severely damaged primary anterior teeth.
A total of 144 anterior teeth in 60 healthy children (male: 32, female: 28) aged 3-4 years, severely damaged by dental caries, were included in the present study. The root canal therapy was performed for the selected teeth. After the construction of the modified omega loop, coronal 4 mm of intracanal ZOE was removed. A thin layer of polycarboxylate cement was placed over ZOE followed by the insertion of the modified omega loop and subsequent restoration of the crown with an internal compomer core and an external composite restoration. The patients were followed at the intervals of 6, 12, and 24 months postoperatively.
The partial loss of the restorative material after 6 months occurred in 5.9% of the teeth. The failure rates after 12 and 24 months were 10.8% and 18.5%, respectively. The primary canines exhibited minimum loss of the restorative material. Two teeth exhibited pathological mobility after two years. There were not any signs of root fracture or recurrent caries in any of the restored teeth.
It may be concluded that the modified omega loop is an efficient technique for the restoration of the severely damaged anterior teeth. The ease of manipulation and short chair-side time are further advantages of the technique.
在当代牙科实践中，修复严重受损的前牙被视为一项严峻挑战。本研究的目的是对一种改良型欧米伽环技术用于修复严重受损的乳前牙进行临床和影像学评估。
本研究纳入了60名3至4岁健康儿童（男32名，女28名）的144颗因龋齿严重受损的前牙。对选定的牙齿进行根管治疗。构建改良型欧米伽环后，去除根管内4毫米的氧化锌丁香酚（ZOE）。在ZOE上放置一层薄的聚羧酸锌水门汀，随后插入改良型欧米伽环，并用内部复合树脂核和外部复合树脂修复体进行冠修复。术后分别在6个月、12个月和24个月对患者进行随访。
6个月后修复材料部分脱落的情况发生在5.9%的牙齿上。12个月和24个月后的失败率分别为10.8%和18.5%。乳尖牙修复材料的脱落最少。两年后有两颗牙齿出现病理性松动。所有修复牙齿均未出现根折或继发龋的迹象。
可以得出结论，改良型欧米伽环是修复严重受损前牙的一种有效技术。该技术操作简便且椅旁操作时间短，具有进一步的优势。
