RESUMO
OBJECTIVE: To investigate which orthosis results in (1) fewer complications; (2) the least extensor lag; and (3) the highest rates of treatment success according to the Abouna and Brown criteria for soft tissue mallet injury in adults. DATA SOURCES: Electronic databases AMED, CINAHL, Embase, MEDLINE, PubMed, OTseeker, and PEDro were searched from the earliest available date until September 16, 2014. STUDY SELECTION: Controlled trials evaluating orthosis type in the conservative management of mallet injury were included. Database searching yielded 1024 potential studies, of which 7 met inclusion criteria with a total of 491 participants. DATA EXTRACTION: Data were extracted using an author-designed extraction form by one reviewer, and accuracy was assessed by a second reviewer. The PEDro scale was used to assess methodological quality. DATA SYNTHESIS: Results were pooled using a random-effects model with inverse variance methods. Dichotomous outcomes are expressed as risk ratios (RRs) and 95% confidence intervals (CIs) and continuous outcomes as standardized mean differences and 95% CIs. There is moderate quality evidence that prefabricated orthoses had 3 times the risk of developing skin complications as compared with all other orthoses (RR, 3.17; 95% CI, 1.19-8.43; I(2)=47%) and nearly 7 times the risk of developing skin complications as compared with custom-made thermoplastic orthoses (RR, 6.72; 95% CI, 1.59-28.46; I(2)=0%). Treatment outcomes were found to be similar for treatment success when prefabricated orthoses were compared with custom-made orthoses (RR, .99; 95% CI, 0.80-1.22; I(2)=39%; very low quality evidence), as well as for extensor lag when custom-made thermoplastic orthoses were compared with other orthoses (standardized mean difference, .03; 95% CI, -.29 to .36; I(2)=0%; moderate quality evidence). CONCLUSIONS: Prefabricated orthoses were found to increase the risk of developing skin complications as compared with custom-made orthoses, but there were no differences in treatment success, failure, or extensor lag.
