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Types of intraoperative head fixation with and without DRF dependent on the diagnosis/indication for navigation and the dental status. MLL = Multilocular lesion, SBP = Skull base procedure, BHP = Burr hole procedure, TNA = Transnasal approach, AWC = Awake craniotomy, NSA = No significant abnormalities, ID = Inadequate dentition, ND = No dentures.
