Prospective, Randomized Clinical Investigation of Two Different Postoperative Wound Dressings

Inclusion Criteria, enrolment phase 1. Age ≥ 18 years 2. Have an expected total length of stay of 4 postoperative days or more 3. Plan for elective primary arthroplasty of the hip or knee 4. Plan for incision size \> 18 cm 5. Give their written informed consent to participate Inclusion Criteria, randomization phase 1\. Undergoing elective primary arthroplasty of the hip or knee Exclusion Criteria,enrolment phase 1. Known allergy or hypersensitivity to any of the components of the dressings 2. Multitrauma 3. Undergoing arthroplasty due to tumour 4. Wound at the surgical site prior to surgery 5. Neurological deficit of operated side ,hemiplegia, etc. 6. Documented skin disease at time of enrolment, as judged by the investigator 7. Previously enrolled in the present investigation 8. Included in another ongoing investigation at present which can interfere with the result of the dressing, judged by the investigator 9. Involvement in the planning and conduct of the clinical investigation, applies to all Molnlycke Health Care staff, investigational site staff and third party vendor. Exclusion Criteria, randomization phase 1. Dressing size does not fit the incision area, over 18 cm 2. Complications that would increase wound risks if investigation dressing is applied 3. Postoperative drain