牙内骨内联合种植的三维光弹性应力分析

Analysis Three-Dimensional Photoelastic Strese on The Endodnntic-Endosseous Implants

应用三维光弹性法研究上颌中切牙根管内分别植入光滑面柱形针、螺纹面柱形针和光滑面锥形针后,根尖附近牙槽骨及针尖附近颌骨内应力的分布;研究了下颌尖牙采用螺纹面柱形种植针植入骨内5mm、7mm、10mm时应力的分布。结果表明:螺纹面柱形种植针的固位和应力分布性能较好;种植深度在 5.8mm-8.6mm间选取较为适宜。

The smooth-surface columnar,tepered and screw-shafed eddodontic endosseous stabilizers were separately placed into the maxillary central incisors'root canal and through apical foramen into alveolar bone.The stress distribution in the apical region and the region close to the tip of the implants in the alveolar bone of tooth models were studied by means of three-dimensional photoelastic technique.The screw-shafted implants were inserted into the mandibular canine and the influence of the implanting embedment depth lextruded out off the apical foramen 5mm,7mm(Omm) to the stress distribution were also studied.The results of the experimental investigation showed that the retentive function and the stress distribution of screw-shafted implants were better than that of others;the implanting depth should be se- lected within 5.8-8.6mm.