Introduction: We previously showed that the distance between the bone fragment and absorbable plate placed on the orbital floor（FPD） shortens over time after treatment of orbital floor fracture（OFF). However, no studies have explored how the area of OFF affects FPD. Therefore, we investigated this in patients who were treated with an unsintered hydroxyapatite（u-HA） + poly-L-Lactide（PLLA） plate. Methods and Materials: Twenty-three patients who were treated with the uHA + PLLA plate for OFF from 2009 to 2017 were included. Coronal computed tomographic images were used to measure changes in FPD over time. We compared two groups with fracture areas ≧ 3 cm² and < 3 cm², as well as two groups with FPD ≦ 2 mm and >2 mm. Results: The initial FPD was greater in the FPD ≧ 3 cm² group. The group with a final FPD > 2 mm had a larger initial FPD. The size of FPD generally decreased over time. Discussion: Although FPD shortened over time regardless of the OFF area, it may take longer to stabilize in cases with a larger initial OFF.

　Autologous cultured epidermal transplantation has been performed for cases of extensive burns when the availability of a healthy skin donor is limited, but the disadvantages are that it takes time to prepare and cannot be used in the acute phase. RECELL^® is a kit that prepares an autologous cell suspension from a small piece of skin by enzymatic treatment when needed in the operating room, and it can also be used in the acute phase. We investigated the treatment of 8 cases of burn injuries using RECELL^®. Epithelialization was achieved with RECELL^® alone for DDB and in combination with 1:6 mesh for DB, being considered a useful treatment option for extensive burns.