Andreasen F M, Norén J G, Andreasen J O, Engelhardtsen S, Lindh-Strömberg U
Department of Pedodontics, Göteborg University, Sweden.
Quintessence Int. 1995 Oct;26(10):669-81.
In three Scandinavian dental facilities, a series of 334 permanent incisors with fractures of the crown or crown and root was treated by reattachment of the fragment with a resin composite. Two centers (Oslo and Stockholm) employed acid etching of enamel alone for fragment bonding (n = 146), while the third center (Copenhagen) used a combination of enamel etching and dentinal bonding (n = 188). Although the final retention rate of fragment bonding was similar in the two groups, it took the dentinal bonding group almost three times as long to drop to 50% fragment retention. This difference could be attributed to greater bonding strength in the dentinal bonding group, greater risk of second injury in the younger acid-etching group, or difficulty in maintaining a dry operative field in the younger age group. The good fragment retention, acceptable esthetics, and pulpal vitality observed in the present series indicate that reattachment of the coronal fragment is a realistic alternative to placement of conventional resin-composite restorations.
在三个斯堪的纳维亚牙科机构中，对334颗冠部或冠部与根部发生骨折的恒牙进行了一系列治疗，采用树脂复合材料重新附着碎片。两个中心（奥斯陆和斯德哥尔摩）仅对牙釉质进行酸蚀以进行碎片粘结（n = 146），而第三个中心（哥本哈根）则使用牙釉质酸蚀和牙本质粘结相结合的方法（n = 188）。尽管两组中碎片粘结的最终保留率相似，但牙本质粘结组下降到50%碎片保留率所需的时间几乎是酸蚀组的三倍。这种差异可能归因于牙本质粘结组中更强的粘结强度、年轻酸蚀组中二次损伤风险更高，或年轻组中保持手术区域干燥的难度更大。本系列中观察到的良好碎片保留率、可接受的美观效果和牙髓活力表明，冠部碎片重新附着是传统树脂复合材料修复体放置的一种现实替代方案。
