Femur, tibia and fibula bone templates to estimate subject-specific knee ligament attachment site locations

JOURNAL OF BIOMECHANICS

卷:49

Article

Pillet, Helene¹  Bergamini, Elena²  Rochcongar, Goulven^1,3  Camomilla, Valentina²  Thoreux, Patricia^1,4  Rouch, Philippe¹  Cappozzo, Aurelio²  Skalli, Wafa¹ 

[1] Arts & Metiers ParisTech, Inst Biomecan Humaine Georges Charpak, Lab Biomecan LBM, 151 Bd Hosp, F-75013 Paris, France

[2] Univ Rome Foro Italico, Interuniv Ctr Bioengn Human Neuromusculoskeletal, Dept Movement Human & Hlth Sci, Rome, Italy

[3] Univ Caen, INSERM COMETE Mobil Attent Orientat & Chronobiol, Dept Orthopedie & Traumatol, F-14032 Caen, France

[4] Univ Paris 13, Hop Avicenne, Serv Chirurg Orthoped & Traumatol, Sorbonne Paris Cite, Bobigny, France

关键词: Knee ligaments;    Ligament footprint;    Bone templates;    Generic model;    Scaling;   

DOI  :  10.1016/j.jbiomech.2016.09.027

来源: Elsevier

【 摘 要 】

In-vivo estimates of the positions of knee ligament attachment sites are crucial for subject-specific knee modelling. The present study provides template digital models of femur, tibia and fibula that embed the positions of centroids of the origins and insertions of cruciate and collateral ligaments, along with information on their dispersion related to inter-individual variability. By using a shape transformation procedure of choice, these templates can be made to match anatomical information measured on a subject under analysis. Generic bone digital models of the femur, tibia and fibula were first chosen as bone templates. Ligament attachment areas were accurately identified through dissection on the bones of 11 knee specimens, and marked using radio opaque paint. Digital models of these bones embedding the positions of the centroids of the identified ligament attachment areas were thereafter obtained using medical imaging techniques. These centroids were mapped onto the relevant bone template, thus obtaining a cloud of 11 points for each attachment site, and descriptive statistics of the position of these points were thereafter determined. Dispersion of these positions, essentially due to inter-individual variability, was below 6 mm for all attachment areas. The accuracy with which subject-specific ligament attachment site positions may be estimated using the bone template models provided in this paper was also assessed using the above-mentioned 11 specimens data set, and a leave-one-out cross validation approach. Average accuracy was found to be 3.3 +/- 1.5 mm and 5.8 +/- 2.9 mm for femoral and tibial/fibular attachment sites, respectively. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

Free