<prompt> Austins classification for ossicular chain defects depends on -Malleus head and stapes footplateMalleus handle and stapes suprastructureMalleus head and stapes suprastructureMalleus head and stapes head  <response>: Austin - Kartush classification of ossicular chain defectTo predict reconstructive success, the status of the middle ear and ossicular chain needs to be assessed.The Austin - Kartush classification of ossicular chain defects provides a method for defining pre-reconstructive ossicular status.Austins original classification had four groups:-Malleus handle and stapes suprastructure presentMalleus handle present, stapes suprastructure absentMalleus handle absent, stapes suprastructure presentMalleus handle and stapes suprastructure absentKartush modified this scheme by adding three classes:-E. Intact ossicular chainF. Ossicular head fixationG. Stapes fixation 