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Arthroscopy. 2012 Nov;28(11):1671-81. doi: 10.1016/j.arthro.2012.04.154. Epub 2012 Sep 6.

Midterm outcomes in patients with cam femoroacetabular impingement treated arthroscopically.

Author information

1
St. Croix Orthopaedics, PA, Stillwater, Minnesota, USA. palme024@aol.com

Abstract

PURPOSE:

The purpose of this study was to evaluate the midterm outcomes of patients with cam-type femoroacetabular impingement treated arthroscopically.

METHODS:

Outcomes were measured with the Nonarthritic Hip Score (NAHS), visual analog scale pain scores, and satisfaction levels preoperatively; at 6 weeks and 3, 6, 12, and 24 months postoperatively; and at final follow-up. Two hundred one procedures were available for final assessment with a minimum follow-up of 36 months (mean, 46 months). Ninety-nine percent of hips had a preoperative Tönnis grade of 1 or less.

RESULTS:

The NAHS significantly improved from a mean of 56.1 to 78.2 (P < .001). Visual analog scale pain scores improved from a mean of 6.8 to 2.7 (P < .001). Preoperative to postoperative satisfaction levels improved from 0.5% to 75% of procedures. Twelve patients required hip arthroplasty during the follow-up period and had a higher incidence of grade 4 acetabular chondral defects versus those without arthroplasty (P < .03). Patients with pincer resections had significantly poorer results versus the remainder of the cohort (P < .01).

CONCLUSIONS:

We have shown satisfactory results using a validated hip scoring system, showing improvement in NAHS, pain scores, and satisfaction levels in a large cohort of patients with cam-type femoroacetabular impingement followed up for a mean of 46 months. The results have shown improvement and stability throughout a range of 36 to 70 months' follow-up. There was no difference in preoperative to postoperative NAHS between age groups. There was a larger percentage of grade 4 acetabular chondral defects in those patients who needed conversion to hip arthroplasty. Patients with associated pincer pathology had poorer results after acetabular rim resection.

LEVEL OF EVIDENCE:

Level IV, therapeutic case series.

PMID:
22959221
DOI:
10.1016/j.arthro.2012.04.154
[Indexed for MEDLINE]

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