Moroni A, Heikkila J, Magyar G, Toksvig-Larsen S, Giannini S
Department of Orthopaedic Surgery, Bologna University, Rizzoli Orthopaedic Institute, Italy.
Clin Orthop Relat Res. 2001 Jul(388):209-17. doi: 10.1097/00003086-200107000-00029.
In a multicenter, prospective, randomized study, the biomechanical and clinical properties of the bone-pin interface were compared with standard tapered pins and hydroxyapatite-coated tapered pins implanted in patients who underwent femoral and tibial external fixation treatments. The results showed that the hydroxyapatite-coated tapered pins are clinically effective in improving the strength of fixation of the bonepin interface. This improvement corresponded to a lower rate of pin tract infection. In the hydroxyapatite-coated pin group, there were no differences in strength of fixation between the pins removed from the infected and uninfected pin tracts. In this pin group, the mean pin extraction torque was 531 +/- 225 Ncm in the infected pin tracts and 508 +/- 233 Ncm in the uninfected pin tracts. In the standard pin group, the mean pin extraction torque was 73 +/- 142 Ncm in the infected pin tracts and 211 +/- 216 Ncm in the uninfected pin tracts. The advantages provided by the hydroxyapatite-coated pins were higher in cancellous bone than in cortical bone.
在一项多中心、前瞻性、随机研究中，对接受股骨和胫骨外固定治疗患者植入的标准锥形针和羟基磷灰石涂层锥形针的骨针界面生物力学和临床特性进行了比较。结果表明，羟基磷灰石涂层锥形针在临床上可有效提高骨针界面的固定强度。这种改善对应于较低的针道感染率。在羟基磷灰石涂层针组中，从感染和未感染针道取出的针在固定强度上没有差异。在该针组中，感染针道的平均拔针扭矩为531±225 Ncm，未感染针道为508±233 Ncm。在标准针组中，感染针道的平均拔针扭矩为73±142 Ncm，未感染针道为211±216 Ncm。羟基磷灰石涂层针在松质骨中提供的优势高于皮质骨。
