Infinity-Lock™ Button System

1. The implant is passed around the coracoid process and both limbs are passed through the loop
2. Both limbs of the Tape are passed through the 4 mm diameter bone tunnel one at a time
3. Single low-profile Button is used to anchor the Tape to the bone
4. Secured with a surgeon’s knot posteriorly

Several studies of the Infinity-Lock Button System have been reported from different centres; a summary of the clinical data is available in the documents below.

• Romano AM et al. Journal of Clinical Medicine 2020;9(8): series of 15 patients with chronic Rockwood grade III acromioclavicular joint dislocations, 18-month follow-up (peer-reviewed paper)
• Loukovitis K et al. EFORT Congress, Lisbon 2019 (congress abstract): series of 15 patients, Rockwood grade IV and V acute and grade III chronic, with a control group, followed for a minimum of 3 months
• Chowdhury A et al. EFORT Congress, Lisbon 2019 (congress abstract): series of 15 mixed-grade acromioclavicular joint dislocations

The studies used different functional scores. Romano et al. (2020) reported a mean Constant-Murley score of 95 at 18-month follow-up, from 38 pre-operatively (figure). Loukovitis et al. (2019) used the Nottingham clavicle score: patients treated with the Infinity-Lock Button System had a mean score of 80 at follow-up, against 69 in the control group. Chowdhury et al. (2019) used the Oxford score, recording 40.5 (maximum 48), improved from 16.2 pre-operatively (no control group).

Two of the studies also measured the reduction, with mean reductions in coracoclavicular distance of 7.4 mm and 8.2 mm. There were two instances of loss of reduction in the 45 cases across the three reports.

Figure. Constant-Murley shoulder function score before surgery and at 18-month follow-up, chronic Rockwood grade III (Romano et al. 2020).