Combined glenoid and humeral bone loss has been identified as an important factor in predicting recurrence after arthroscopic shoulder stabilisation. The “glenoid track” concept is proposed to predict recurrent instability by comparing the relative size of the glenoid to the humeral bone defect. The aim of this study was to investigate whether assessment of the glenoid track on a pre-operative MR arthrogram could be used to predict subsequent instability in a typical UK population.

A retrospective study was undertaken of 175 primary arthroscopic stabilisation procedures of which 82% (n=143) were men. The median age was 26 years (IQR 22 to 32, range 16 to 77). The median follow-up was 76 months (range 21 to 125). A pre-operative MR arthrogram was used to determine if the shoulder was on-track or off-track. The endpoint of recurrent dislocation was examined.

The prevalence of “off-track” bone loss in this group was 14.2% (n=25). There were 6 (24%) dislocations in the off-track group compared with 5 (3.33%) dislocations in the on-track group (RR 7.2, 95% CI 2.45 to 20.5, p=0.001). At 5 years, the cumulative redislocation rate was 26.1% in the off-track group compared with 8.7% in on-track group. The rate of any recurrent instability was 60% (n=15) v 18% (n=27) (RR 3.33, 95% CI 2.02 to 5.20, p<0.0001). Glenoid track (on v off) was not predicted by gender (p=0.411).

In a typical UK population assessment of the glenoid track on an MR arthrogram can be used to risk stratify patients with shoulder instability.

This multi-centre single-blind randomised control trial compared outcomes in patients with acute displaced mid-shaft clavicle fractures treated either by primary open reduction and plate fixation (ORPF), or non-operative treatment (NT).

Two-hundred patients were randomised to receive either ORPF or NT. Functional assessment was conducted up to one-year using DASH, SF-12 and Constant scores (CS). Union was evaluated using radiographs and CT.

Rate of non-union was significantly reduced after ORPF (1 following ORPF, 16 following NT, odds ratio=0.07, 95% CI=0.01–0.50, p=0.0006). 7 patients had delayed-union after NT. Group allocation to ORPF was independently predictive of development of non-union. DASH and CS were significantly better in the ORPF group 3-months post-surgery, but not at one-year (mean DASH = 6.2 after NT versus 3.7 after ORPF, p=0.09; mean CS = 86.1 after NT versus 90.7 after ORPF, p=0.05). Group allocation was not predictive of one-year outcome. Non-union was the only factor independently predictive of one-year functional outcome. There were no significant differences in time off work or subjective scores. Five patients underwent revision for complications after ORPF. 10 patients underwent metalwork removal. Treatment cost was significantly greater after ORPF (p=0.001). ORPF reduces rate of non-union compared with NT and is associated with better early functional outcomes. Improved outcomes are not sustained at one-year. Differences in functional outcome appear to be mediated by prevention of non-union from ORPF. ORPF is more expensive and associated with implant-related complications not seen with NT. Our results do not support routine primary ORPF for displaced mid-shaft clavicle fractures.