Rate of heterotopic ossification likely unaltered with capsular closure

Recently published data demonstrated the rate of heterotopic ossification did not appear to be altered by capsular closure when compared with patients whose capsulotomy was not repaired.

From July 2011 to March 2013, researchers retrospectively compared 100 patients who underwent hip arthroscopy. Patients had a mean follow-up period of 12.7 months. The group was divided into 50 control patients whose capsules remained open after capsulotomy and 50 patients who underwent capsular closure utilizing No. 1 polydioxanone sutures.

The researchers documented the indication for surgery, procedure performed, number of anchors used, surgery time and the radiographic follow-up period. Postoperatively, anteroposterior and frog radiographs were taken 2 weeks after surgery, ruling out any fractures, and at 9 weeks or later, identifying cases where heterotopic ossification (HO) had developed. Using the Brooker classification, the researchers assessed HO using radiographs. When appropriate, researchers also analyzed the statistics with the Fisher exact test and Student t test.

Results showed femoroacetabular impingement and isolated labral tears were the leading indications for surgery in 56 patients and 20 patients, respectively. In 64 patients, no HO was observed, whereas 36 patients had radiographic HO findings. Of the 36 patients, 17 patients had grade 1 HO, 15 patients had grade 2 HO, and four patients had grade 3 HO.

No statistically significant differences were observed between the two groups in terms of rate of HO, according to the researchers. – by Monica Jaramillo

Disclosures: Amar reports no relevant financial disclosures. Please see the full study for a list of all other authors’ relevant financial disclosures.

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Amar E, et al. Arthroscopy. 2015;doi:10.1016/j.arthro.2014.08.026.