Clinical Orthopaedics and Related Research

, Volume 466, Issue 11, pp 2848–2855 | Cite as

Excision of Painful Bipartite Patella: Good Long-term Outcome in Young Adults

  • Maria WeckströmEmail author
  • Mickael Parviainen
  • Harri K. Pihlajamäki
Original Article


Excision of the accessory bipartite fragment is widely used, but its long-term outcome is not known. We evaluated the outcome after surgical excision of a symptomatic accessory bipartite or multipartite patella fragment in young adult men performing their compulsory military service and determined the incidence of painful bipartite patellae in this group of skeletally mature adults. We followed 25 of 32 patients for a minimum of 10 years (mean, 15 years; range, 10–22 years). The incidence of painful, surgically treated bipartite patella was 9.2 per 100,000 recruits. Patients’ median age at surgery was 20 years. There were 19 superolateral and six lateral bipartite fragments. Other radiographic findings were rare. At followup, the Kujala score mean was 95 points (range, 75–100 points), and osteoarthrotic changes (Kellgren-Lawrence Grade 1) were seen in two knees. No reoperations related to bipartite patella occurred during the followup. Symptomatic bipartite patella is rare and does not seem primarily associated with anatomic deviations, but when incapacitating pain persists despite nonoperative treatment, surgical excision seems to yield reasonable functional outcome and quick recovery with no apparent adverse sequelae. Our data suggest there is no reason to avoid this technically undemanding procedure for treating persistent symptoms of bipartite patella in young adults.

Level of Evidence: Level IV, therapeutic study. See the Guidelines for Authors for a complete description of levels of evidence.


Military Service Osteochondritis Dissecans Sulcus Angle Kujala Score Bipartite Patella 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



We thank Olli Kiviluoto, Pekka Jokio, Tuomo Visuri, Kalevi Hietaniemi, Veli-Matti Nurmi, and Kai Turula, orthopaedic surgeons from the Central Military Hospital, Finland, for their contributions in the operations reported in this study.


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Copyright information

© The Association of Bone and Joint Surgeons 2008

Authors and Affiliations

  • Maria Weckström
    • 1
    • 2
    Email author
  • Mickael Parviainen
    • 2
  • Harri K. Pihlajamäki
    • 2
    • 3
  1. 1.Centre for Military Medicine, Research DepartmentLahtiFinland
  2. 2.Department of Orthopaedic SurgeryCentral Military HospitalHelsinkiFinland
  3. 3.Centre for Military Medicine, Research DepartmentHelsinkiFinland

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