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.
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References
Duke RP, Somerset JH, Blacharski P (1977) Some investigations of the accuracy of knee joint kinematics. J Biomech 10:659–667
Frankel VH, Burstein AH (1970) Orthopedic biomechanics. Lea and Febiger, Philadelphia
Goodfellow J, Hungerfood DS, Zindel M (1976) Patellofemoral joint mechanics and pathology, part 1. J Bone Joint Surg [Br] 58:287–290
Hehne HJ, Schlageter MS, Hultsch W, Rau WS (1981) Experimentelle patello-femorale Kontaktflächenmessungen, Teil 1. Z Orthop 119:167–176
Hiss E, Schwerbrock B (1980) Untersuchungen zur räumlichen Form der Femurkondylen. Z Orthop 118:396–404
Huberti HH, Hayes WC (1984) Patellofemoral contact pressures. J Bone Joint Surg [Am] 66:715–724
Maquet P (1976) Biomechanics of the knee. Springer, Berlin Heidelberg New York, pp 57–58
Pauwels F (1965) Gesammelte Abhandlungen zur funktionellen Anatomie des Bewegungsapparates. Springer, Berlin Heidelberg New York
Reuleaux F (1875) Theoretische Kinematik, Bd 1. Vieweg, Braunschweig
Ritter G (1975) Therapie der Patellafraktur. Biomechanik, Operation und Nachbehandlung. Hefte zur Unfallheilkd 120:61–67
Soudan K, Audekercke R van, Martens M (1979) Methods, difficulties and inaccuracies in the study of human joint kinematics and pathokinematics by the instant axis concept. Example: the knee joint. J Biomech 12:27–33
Strasser H (1917) Lehrbuch der Muskel- und Gelenkmechanik. Vol 3: Spezieller Teil: Die untere Extremität. Springer, Berlin, S367–418
Eijden TMGJ van, Kouwenhoven E, Verburg J, Weijs WA (1986) A mathematical model of the patellofemoral joint. J Biomech 19:219–229
Veress SA, Lippert FG, Hou MCY, Takomoto T (1979) Patellar tracking pattern measurement by analytical X-ray photogrammetry. J Biomech 13:677–685
Weber W, Weber E (1836) Mechanik der menschlichen Gehwerkzeuge. Dietrich'sche Druckerei, Göttingen, S 161–202
Zuppinger H (1904) Die aktive Flexion im unbelasteten Kniegelenk. Bergmann, Wiesbaden, S 31–56
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Lengsfeld, M., Ahlers, J. & Ritter, G. Kinematics of the patellofemoral joint. Arch Orthop Trauma Surg 109, 280–283 (1990). https://doi.org/10.1007/BF00419945
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DOI: https://doi.org/10.1007/BF00419945