The goal of this prospective observational cohort study is to provide epidemiological and prognostic data from a defined urban population and to improve understanding of risk factors and long-term outcomes following first-time anterior shoulder dislocation in patients aged 16 years and older presenting to the Oslo Accident and Emergency Outpatient Clinic.
The main questions the study aims to answer are:
* What is the incidence of first-time anterior shoulder dislocations in the Oslo region? * What is the prevalence and extent of bipolar bone loss and soft tissue injuries measured by CT and MR after a first-time shoulder dislocation? * Does bone loss increase the risk of recurrent shoulder instability? * How do imaging findings and recurrence influence long-term shoulder function and quality of life?
Participants will:
* Undergo standard clinical evaluation and conventional radiographs as part of routine care and asked to participate and followed longitudinally * Be offered additional CT and MRI imaging to assess glenoid and humeral bone loss and to evaluate soft tissue injuries. * Complete electronic questionnaires (WOSI, EQ-5D-5L, pain score, Rowe score, return to sport/work) at 3 months, 1 year, 5 years, and 10 years. * Be invited to long-term follow-up, including radiographs at 10 years to evaluate signs of osteoarthritis.
Age ≥16 years
Diagnosis of first-time traumatic anterior shoulder dislocation
Resident in the Oslo region who presents to Oslo Accident and Emergency Outpatient Clinic for treatment or follow-up within two weeks after initial injury
Ability to provide informed consent
Previous shoulder dislocation requiring reduction (Patients uncertain about prior dislocation are excluded)
Age < 16 years
Chronic substance abuse affecting compliance
Inability to understand Norwegian or English