Filho Luiz Carlos Magno, Cirano Fabiano Ribeiro, Hayashi Fernando, Feng Hsu Shao, Conte Alexandre, Dib Luciano Lauria, Casati Marcio Zaffalon
Paulista University, São Paulo, SP, Brazil.
J Oral Implantol. 2014 Jun;40(3):259-62. doi: 10.1563/AAID-JOI-D-11-00183.
The primary stability of dental implants is fundamental for osseointegration. Therefore, this study aimed to assess the correlation between insertion torque (IT) and resonance frequency analysis (RFA) of implants placed in mandibles and maxillas of different bone densities. Eighty dental implants were placed in maxillas and mandibles, and IT and the implant stability quotient (ISQ) were measured at the time of implant insertion. Bone density was assessed subjectively by the Lekholm and Zarb index. The type I and II densities were grouped together (group A)as were the type III and IV densities (group B). The IT in group A was higher (Student t test, P = .0013) than in group B (46.27 ± 18.51 Ncm, 33.62 ± 14.74 Ncm, respectively). The implants placed in group A showed higher ISQ (Student t test, P = .0004) than those placed in group B (70.09 ± 7.50, 63.66 ± 8.00, respectively). A significant correlation between IT and the ISQ value was observed for group A (Pearson correlation test; r = 0.35; P = .0213) and for group B (r = 0.37; P = .0224). Within the limitations of this study, it was possible to conclude that there is a correlation between IT and RFA of implants placed in mandibles and maxillas of different bone densities.
牙种植体的初期稳定性是骨结合的基础。因此，本研究旨在评估植入不同骨密度下颌骨和上颌骨的种植体的植入扭矩（IT）与共振频率分析（RFA）之间的相关性。将80颗牙种植体植入上颌骨和下颌骨，并在种植体植入时测量IT和种植体稳定性商数（ISQ）。采用Lekholm和Zarb指数主观评估骨密度。I型和II型密度归为一组（A组），III型和IV型密度归为一组（B组）。A组的IT高于B组（Student t检验，P = 0.0013）（分别为46.27±18.51 Ncm和33.62±14.74 Ncm）。A组植入的种植体显示出比B组更高的ISQ（Student t检验，P = 0.0004）（分别为70.09±7.50和63.66±8.00）。A组（Pearson相关检验；r = 0.35；P = 0.0213）和B组（r = 0.37；P = 0.022）的IT与ISQ值之间存在显著相关性。在本研究的局限性范围内，可以得出结论，植入不同骨密度下颌骨和上颌骨的种植体的IT与RFA之间存在相关性。
