caa a22 4500 465733808 CHVBK 20180323111749.0 cr unu---uuuuu 170327e19900801xx s 000 0 eng 10.1007/BF00419945 doi (NATIONALLICENCE)springer-10.1007/BF00419945 Kinematics of the patellofemoral joint [Elektronische Daten] Investigations on a computer model with reference to patellar fractures [M. Lengsfeld, J. Ahlers, G. Ritter] Summary: Patellofemoral kinematics were studied on a computer model. The articulating point of the patella moves from distal to proximal during flexion, until the quadriceps tendon starts to turn around the femur tendofemoral gliding. The pattern of patellofemoral movement consists of a gliding and rolling component, the latter at its maximum at the beginning of flexion. The pathway of the instant centers of motion moves from dorsal to ventral during flexion. Stress analysis shows that the contact area is at all times the area of maximum bending stress. The distal part of the patella is the part with mechanical stress at all angles of flexion. The conclusions to be drawn for treatment are that fractures within the proximal and central part of the patella need a very high stability of internal fixation, the distal part of the patella less so. Postoperative treatment must take into account the changing contact area, because the peak stress is always at the contact area. Springer-Verlag, 1990 Lengsfeld M. Clinic of Trauma Surgery, University of Mainz, Langenbeckstrasse 1, D-6500, Mainz, Germany aut Ahlers J. Clinic of Trauma Surgery, University of Mainz, Langenbeckstrasse 1, D-6500, Mainz, Germany aut Ritter G. Clinic of Trauma Surgery, University of Mainz, Langenbeckstrasse 1, D-6500, Mainz, Germany aut Archives of Orthopaedic and Trauma Surgery Springer-Verlag 109/5(1990-08-01), 280-283 0936-8051 109:5<280 1990 109 402 https://doi.org/10.1007/BF00419945 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00419945 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lengsfeld M. Clinic of Trauma Surgery, University of Mainz, Langenbeckstrasse 1, D-6500, Mainz, Germany aut NATIONALLICENCE 700 1- Ahlers J. Clinic of Trauma Surgery, University of Mainz, Langenbeckstrasse 1, D-6500, Mainz, Germany aut NATIONALLICENCE 700 1- Ritter G. Clinic of Trauma Surgery, University of Mainz, Langenbeckstrasse 1, D-6500, Mainz, Germany aut NATIONALLICENCE 773 0- Archives of Orthopaedic and Trauma Surgery Springer-Verlag 109/5(1990-08-01), 280-283 0936-8051 109:5<280 1990 109 402 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer