Evaluation on the mechanical properties and biocompatibility of the FRP esthetic orthodontic wire for clinical application

临床应用FRP美容正畸导丝力学性能及生物相容性评价

• 批准号: 10357019
• 负责人: SATO Yoshiaki
• 金额: $ 17.56万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10357019/
• 关键词: FRP wire; orthodontic treatment; mechanical property; improved bracket; edgewise bracket; fictional property; 歯科矯正用ワイヤー; 複合材料; 審美性歯科材料; 繊維強化型プラスチック(FRP); 生体材料; CPSAガラス繊維; 機械的特性; 機械特性; 3点曲げ試験

The evaluation on the mechanical properties and biocompatibility of the FRP esthetic orthocontic wire for clinincal appoication is the aim of this research. The results are as follows:1. After the FRP wire have been immersed in mechanical properties through water immersion. The deactivating load and elastic recovery in s hysterisis loop decreased much after water immersion. To prevent this, Bis-GMA was coated by R＆D method. The FRP with this coating by the method of R＆D with dipping speed 1 cm/min., showed sufficient rtention of flesural load (D/L 60-80 %) and good elastic recovery even after 30 days.2. To develop the FRP wires in combination with biocompatible CaO-P_2O_5-SiO_2-Al_2O_3 (CPSA) glass fibers and PMMA matrix by hot drawing method, a photo cure polymerization method was applied to form the rectangular timber with a sufficient torque force. The FRP wire using dental composite resin for matrix showed a torsional load of 1/2 of Ni-Ti wire. This showed that the fiber content mainly contributes to flexural load while the use of stigg materials for the matrix is much more effective for improbing torsional properties.3. To avoid the shear force exerted by ligatures, improved brackets with various radius curvature were evaluated. The limit of deflection of the FRP wire and the recovery of the elastic properties improved with the larger radius curvatures. It was also clarified from ligated bending test that good elastic recovery and high load-retention could be obtained.4. The frictional properties between orthodontic wires and brackets and frictional coefficients were obtained under conditions of single contact plane and double contact planes. The friction properties of FRP wire with brackets were similar to those of metal wires expect for the polycrystalline alumina bracket.

对FRP的正质导线前诊所的评估为theam ofear ch。 R＆dith dith dith浸入速度1 cm/min（d/l 60-80％），即使在30天后恢复了良好的弹性恢复。玻璃纤维和PMMA基质通过热图方法，将照片治愈聚合方法用于形成矩形锡的矩形扭矩力。虽然对扭转型的使用量更大。3可以获得4。

项目成果

宇賀大 他: "審美矯正ワイヤーに適したブラケットの試作"歯科材料・器械. 19. 553-564 (2000)

Ugadai 等人：“适用于美观正畸线的托槽原型”《牙科材料和仪器》19. 553-564 (2000)。

豊泉 裕 他: "光重含法による曲げおよびねじり剛性を有する審美性矯正ワイヤーの試作"歯科材料・器械. 18. 429-440 (1999)

Yutaka Toyoizumi 等人：“通过光学加载方法生产具有弯曲和扭转刚度的美观正畸线的原型”《牙科材料和仪器》18. 429-440 (1999)。

T.Imai et al.: "Mechanical properties and aesthetics of FRP or thedontic wire fabricated by hot drawiy"Biomaterials. 19. 2195-2200 (1998)

T.Imai 等人：“热拉伸制造的 FRP 或治疗线的机械性能和美观性”生物材料。

T.Imai et al.: "Effects of water immersion on mechanical preperties of new esthetic or thadentic wire"An. J. Orthod. Dentfacial Orthop.. 116. 533-538 (1999)

T.Imai 等人：“水浸对新美学线或 thadentic 线的机械性能的影响”An。

Imai, T.: "Temprature-dependence of the Mechanical properties of FRP Orthedontic wire"Dental Materials Jourual. 18. 167-175 (1999)

Imai, T.：“FRP 矫形线机械性能的温度依赖性”牙科材料杂志。