SATLEC ACTEON peizotome 2 was used for bone cutting and separating the cystic lining from the surrounding bone.After complete removal of the cyst, the bony window was replaced back in place and the flap was sutured.

A carbide bur was used to remove the bone to uncover the cyst. A periosteal elevator and a curette were used to aid in the removal of the cystic lesion.

Piezosurgery: SATLEC ACTEON peizotome 2 (A company of ACTEON Group, France) was used. Conventional surgery with rotary instruments

Time from start of the incision to the last suture.

To assess the visibility of the field and ease of operation, a visual analogue scale was used. Each parameter constituted a horizontal 100 mm continuous line in which value of zero indicates minimum level of the assessed parameter and 100 indicates the maximum level. Each surgeon marked on the line then the score is determined by measuring in mms from the left end of the line to that marked point. (higher scores mean a better outcome)

A probe was used to prick the patient's skin relevant to the area of operation to assess the neurosensory function in comparison to the contralateral side.If the patient states a difference in sensation between the side of operation and the normal side, it was assigned as "Y" and if there was no difference in sensation between the two sides, it was assigned as "N".

The change between preoperative and 3-months postoperative values of both groups were compared