Different fixation constructs and the risk of non union following first metatarsophalangeal joint arthrodesis.
BACKGROUND The aim of this study was to determine if a single or separate construct with interfragmentary screw was associated with higher rates non union following first metatarsophalangeal joint (MTPJ) arthrodesis. METHODS A retrospective analysis of patients undergoing first MTPJ arthrodesis between April 2010 and June 2017 was performed. Patients who received either a single (Stryker Anchorage 1 MTP Cross Plate) or separate (Stryker Anchorage 1 MTP locking plate with one Asnis partially threaded compression screw) construct locking plate and interfragmentary compression screw were reviewed. Descriptive statistics were generated for sample demographics and between group differences were calculated. Multivariable regressions explored internal fixation type and association with non union. RESULTS A total of 280 first MTPJ arthrodesis met the inclusion criteria and were reviewed. The incidence of non union was 7.9% of procedures (22 joints) Following multivariable binary logistic regression, the single construct locking plate with interfragmentary compression screw was associated with an increased risk of non union (OR 3.43, 95% CI 1.26 9.33) adjusting for age, gender and comorbidity. CONCLUSIONS A single construct interfragmentary screw and locking plate (Stryker Anchorage 1 MTP Cross Plate) was associated with an increased incidence of non union following first MTPJ arthrodesis.
Foot and ankle surgery official journal of the European Society of Foot and Ankle Surgeons