In colorectal surgery, there has been a growing interest in the study of Surgical Site Infections (SSI), with an outstanding variability of reported incidence, ranging from 3% up to 30% depending on the series. Although general risk factors for infection have been identified, there is still a need to identify specific risk factors for colorectal surgery patients, to try to reduce these numbers. The technique and materials used for wound closure have been considered as interesting variables for study.