Inclusion Criteria:  Aged 5 to 18 years Had orthopedic surgery 3 weeks ago and within 6 weeks Had incision sites around the knee All surgical wounds healed completely Length of surgical wounds between 2 and 15 centimeters Planed to treat incisional scar with scar dressing, adhesive tapes, or adhesive strips  Exclusion Criteria:  Surgical wound infection Atopic dermatitis or sensitive skin Not able to make return visits regularly Participation was not appropriate determined by physician