Details

Autor(en) / Beteiligte

• Pressel, T
• Lengsfeld, M
• Leppek, R
• Schmitt, J

Titel

Bone remodelling in humeral arthroplasty: follow-up using CT imaging and finite element modeling--an in vivo case study

Ist Teil von

• Archives of orthopaedic and trauma surgery, 2000, Vol.120 (5-6), p.333-335

Ort / Verlag

Germany: Springer Nature B.V

Erscheinungsjahr

2000

Quelle

MEDLINE

Beschreibungen/Notizen

• Little material is available in the literature about remodelling of the human humerus after implantation of a shoulder hemiarthroplasty. A 73-year-old patient was examined by CT 4 years after implantation of a right shoulder hemiarthroplasty, and the bone density as represented by Hounsfield values was compared with the contralateral side. Additionally, a three-dimensional finite-element model was generated from the image data and analysed. Bone density was reduced around the prosthesis when compared with the contralateral side. The stresses were transmitted through the prosthesis, while low bone stresses were found surrounding the prosthesis. Distally from the prosthesis, high stresses were found. On the control side, a more homogeneous stress distribution was noted. The results could be explained by bone resorption around the prosthesis caused by stress shielding; this hypothesis has to be confirmed by future studies.