Fracture of temporal bone Chunfu dai m,d ph. d Otolaryngology yy Department Fudan University
Fracture of temporal bone Chunfu Dai M.D & Ph.D Otolaryngology Department Fudan University
Classifications 1. Longitudinal fractures 2.Transverse fractures 3 Mixed fractures
Classifications 1. Longitudinal fractures 2. Transverse fractures 3. Mixed fractures
Longitudinal fractures 80%0 of Temporal Bone fractures Lateral Forces along suti the petrosquamous /oniterosayorich Groove ot greater petrosalre Geniculum of facial nery cochlea suture line Plane of anterior (supe Cochlear nery semicircular canal 15-20% Facial Nerve involvement Vestibulocochlear nerve vIID Lateral horizontal EAC laceration estibular nerve xternal wpstihul Plane ot postenor or endolymphatic out semicircularcanal
Longitudinal fractures ◼ 80% of Temporal Bone Fractures ◼ Lateral Forces along the petrosquamous suture line ◼ 15-20% Facial Nerve involvement ◼ EAC laceration
Transverse fractures 20%of Temporal Bone fractures Forces in the Antero- Posterion【w水 r Groove of greater petrosal rer direction on floor of skull Geniculum of farial nerv Inner ear injury ane of anterior(suo Cochlear nerve 50% Facial nerve taal nerve ( vI Opening of intemal Involvement Vestibulocochlear nerve (vIll) Lateral (horizontal) EAC intact semicircular canal Petrous part semicrcular canal
Transverse fractures ◼ 20% of Temporal Bone Fractures ◼ Forces in the Antero-Posterior direction ◼ Inner ear injury ◼ 50% Facial Nerve Involvement ◼ EAC intact
Physical Examination Tuning Fork exam Pneumatic Otoscopy
Physical Examination ◼ Tuning Fork exam ◼ Pneumatic Otoscopy