Department of Orthodontics, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.
Eur J Orthod. 2010 Jun;32(3):268-73. doi: 10.1093/ejo/cjp116. Epub 2010 Jan 15.
Several fluoride-releasing bonding materials are available for orthodontic bracket placement. These are supposed to prevent white spot lesions during therapy. The objectives of this in vitro study were to evaluate the shear bond strength (SBS) and failure mode of a recently introduced fluoride-releasing adhesive, as well as the comparison with established orthodontic adhesives. Sixty bovine mandibular incisors were randomly allocated to three groups (n = 20): stainless steel brackets were bonded with Transbond Plus Color Change Adhesive, Transbond XT, or Light Bond. A universal testing machine was used to determine the SBS at a crosshead speed of 1 mm/minute. After debonding, the adhesive remnant index (ARI) was used to assess the adhesive remaining on the brackets. One-way analysis of variance comparing the three experimental groups showed no differences between the bonding systems for mean SBS (P = 0.27). ARI scores showed more residual adhesive on the teeth bonded with the Transbond systems (P < 0.01). As the fluoride-releasing bonding system provided sufficient mean bond strength in vitro (19.9 MPa), it may be used as an additional prophylactic measure in orthodontic therapy. However, the clinical effectiveness of its fluoride release may be questionable, as the amount of fluoride required from a bonding material to be caries preventive is still unknown.
有几种释放氟化物的粘结材料可用于正畸托槽的放置。这些材料据称可以在治疗过程中预防白斑病。本体外研究的目的是评估一种新引入的释放氟化物的粘合剂的剪切粘结强度（SBS）和失效模式，并与已建立的正畸粘合剂进行比较。将 60 个牛下颌切牙随机分配到三组（n = 20）：不锈钢托槽用 Transbond Plus 变色粘合剂、Transbond XT 或 Light Bond 粘合。使用万能试验机以 1mm/min 的十字头速度确定 SBS。脱落后，使用粘固剂残留指数（ARI）评估托槽上残留的粘固剂。对三个实验组进行单向方差分析显示，三种粘结系统的平均 SBS 之间没有差异（P = 0.27）。ARI 评分显示，用 Transbond 系统粘结的牙齿上残留的粘固剂更多（P < 0.01）。由于释放氟化物的粘结系统在体外提供了足够的平均粘结强度（19.9MPa），因此它可以作为正畸治疗中的一种额外的预防措施。然而，其氟化物释放的临床效果可能值得怀疑，因为预防龋齿所需的粘结材料中的氟化物含量仍不清楚。
