Consolo Ugo, Travaglini Domenico, Todisco Marzio, Trisi Paolo, Galli Silvia
Università degli Studi diModena e Reggio Emilia, Sweden.
J Craniofac Surg. 2013 May;24(3):860-5. doi: 10.1097/SCS.0b013e31827ca3cf.
The aim of this study was to evaluate histologically and biomechanically the peri-implant bone healing around implants placed with high torque after a follow-up of 8 and 12 weeks. A total of 12 implants were placed in the lower edge of the mandible of 2 sheep. In each sheep, 3 implants were placed with a low torque (<25 N · cm, LT group) as a control, and 3 implants were placed with a high insertion torque (maximum torque, HT group). The sheep were killed after 8 and 12 weeks of healing, and the implants were examined for removal torque, resonance frequency analysis, and histologic analysis.The mean insertion torque in the LT group was 24 N · cm, whereas it was 105.6 N · cm in HT. All the implants osseointegrated and histologic analysis showed similar aspects of the peri-implant bone tissue for both groups and both healing times. Mean removal torque values for LT implants were 159.5 and 131.5 N · cm after 8 and 12 weeks, respectively, whereas those for the HT were 140 and 120 N · cm at 8 and 12 weeks, respectively. Implant stability quotient values were 26.6 and 76 for the LT group and 74 and 76 for the HT group at 8 and 12 weeks, respectively.It could be concluded that high implant insertion torque does not induce adverse reaction in cortical bone and does not lead to implant failure.
本研究的目的是在随访8周和12周后，对高扭矩植入的种植体周围的种植体周围骨愈合情况进行组织学和生物力学评估。将总共12枚种植体植入2只绵羊下颌骨的下缘。在每只绵羊中，植入3枚低扭矩（<25 N·cm，LT组）种植体作为对照，植入3枚高插入扭矩种植体（最大扭矩，HT组）。在愈合8周和12周后处死绵羊，并对种植体进行取出扭矩、共振频率分析和组织学分析。LT组的平均插入扭矩为24 N·cm，而HT组为105.6 N·cm。所有种植体均实现骨整合，组织学分析显示两组在两个愈合时间点的种植体周围骨组织情况相似。LT种植体在8周和12周后的平均取出扭矩值分别为159.5 N·cm和131.5 N·cm，而HT种植体在8周和12周时分别为140 N·cm和120 N·cm。LT组在8周和12周时的种植体稳定性商值分别为26.6和76，HT组分别为74和76。可以得出结论，高种植体插入扭矩不会在皮质骨中引起不良反应，也不会导致种植体失败。
