2015 ISAKOS Biennial Congress ePoster #1913
Symptoms and Function in Patients with Chronic Lateral Patella Dislocation
Truls M. Straume-Næsheim, MD, PhD, Haugesund NORWAY
Jan Rune Mikaelsen, MD, PhD, Lørenskog NORWAY
Einar Sivertsen, MD, PhD, Oslo NORWAY
Brian M. Devitt, MD, FRCS, FRACS, Melbourne, VIC AUSTRALIA
Jeff C Brand, MD, Alexandria, MN UNITED STATES
Lars-Petter Ness Granan, MD NORWAY
Asbjørn Årøen, MD, PhD, Oslo NORWAY
Akershus University Hospital, Lørenskog, NORWAY
FDA Status Not Applicable
Summary: The study compared the severity of the symptoms of patients with recurrent patella dislocations to symptoms reported by matched ACL injured controls and found that the patients with recurrent patella dislocation experience symptoms and function at the same level or inferior to the ACL injured scheduled for surgery
Patella dislocation is a serious knee injury with a peak incidence in the 10-17 year age group with a high prevalence of redislocations causing anxiety and loss of confidence in the knee. The purpose of the study was to compare the severity of the symptoms of patients with recurrent patella dislocations with those of ACL injured patients scheduled for surgery.
Patients with two or more unilateral patella dislocations referred for reconstructive surgery of the medial patellofemoral ligament (MPFL) from May 2010 to May 2014 were included in the study (MPFL group). These cases were matched with two cases each obtained from the Norwegian Knee Ligament Registry (ACL controls). The matching variables were age, sex and BMI. Symptoms and functions measured by KOOS were compared.
33 patients (10 men, 23 women) with mean age of 18.9 (SD=5.0) were included and matched with 66 ACL-controls. The KOOS subscores for the MPFL group were: Pain; 72.1, Symptoms; 68.3, ADL; 83.3, Sport; 51.4 and QoL; 37.5. The scores were significantly lower compared to the ACL controls for the first three of the five KOOS subscores (Differences: Pain; 8.6, p=0.021, Symptoms; 11.0, p=0.001, ADL; 7.0, p=0.009). For the last two subscores there was no significant difference between the groups. Articular cartilage injury was present in 36.4% in the MPFL group and 7.6% in the ACL group (p<0.001). The median duration of symptoms from injury to operation was 32.5 months (range: 18.3-78.5) for the MPFL-group and 6.5 months (range: 4.0-15.0) for the ACL controls (p<0.001).
and clinical relevance: Patients with recurrent patella dislocations experience symptoms and function at the same level or inferior to the ACL injured scheduled for surgery. The patients with recurrent patella instability need an effective treatment as exists for the ACL injured knee.
Level of evidence: Level II, case-control study.