Prospective study on single implant retained-overdentue

对于下颌无牙患者，在模拟模型上对一颗（中线）或两颗（左犬齿区和右犬齿区）种植体辅助下的种植体覆盖义齿进行生物力学研究。对于同一种植体支撑，无论何种附着体，颊侧、左右侧均出现拉伸应变，舌侧均出现压缩应变。与第一前磨牙区相比，第一磨牙区周围软组织的压力分布更大。同样，在两种种植体支撑中，无论何种附着体，颊侧和内侧均出现拉伸应变，舌侧和内侧均出现压缩应变。第一磨牙区周围软组织的压力分布高于第一前磨牙区。

For mandibular edentulous patient, biomechanical study was performed on the implant overdeture assisted by one (midline) or two implants (left and right canine regions) on the simulation model.As for the one implant support, tensile strain was observed on the buccal, right, and left sides, and compressive strain was occurred on the lingual side regardless of kinds of the attachments. The greater pressure distribution was shown on the soft tissue around the first molar region compared to the first premolar region. Similarly, in the two implant support, tensile strain was observed on the buccal and medial sides, and compressive strain was occurred on the lingual and medial sides regardless of kinds of the attachments. The pressure distribution on the soft tissue around the first molar region was higher than that of the first premolar region.