The potential protective effects of temporal bone pneumatization: A shock absorber in temporal bone fracture

We hypothesize that when temporal bone fractures occur, the pneumatic cells in the temporal bone are able to absorb most of the impact force during a traumatic event. This study aims to correlate the degree of pneumatization of the temporal bone with the severity of temporal bone fracture (TBF). Cha...

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Veröffentlicht in:PloS one 2019-05, Vol.14 (5), p.e0217682-e0217682
Hauptverfasser: Kang, Tae Kyu, Ha, Ryun, Oh, Jae Hwan, Sunwoo, Woongsang
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Ha, Ryun
Oh, Jae Hwan
Sunwoo, Woongsang
description We hypothesize that when temporal bone fractures occur, the pneumatic cells in the temporal bone are able to absorb most of the impact force during a traumatic event. This study aims to correlate the degree of pneumatization of the temporal bone with the severity of temporal bone fracture (TBF). Charts and computed tomography scans representing 54 TBFs, diagnosed from 2012 to 2017 at a single tertiary hospital, were retrospectively reviewed. Temporal bone pneumatization (TBP) in the petrous apex and mastoid region was evaluated using previously published classification systems. TBP classifications and fracture types were correlated with TBF complications such as sensorineural hearing loss (SNHL), facial nerve palsy (FNP), and vestibular dysfunction. Patients with increased pneumatization of the temporal bone had significantly fewer and less severe SNHL. SNHL more strongly correlated with the degree of pneumatization in the mastoid (P = 0.005) than that in the petrous apex (P = 0.024). On the other hand, the degree of TBP correlated poorly with FNP and vestibular dysfunction. However, the mastoid hypopneumatization demonstrated significant correlation with otic-capsule violations (P = 0.002). Fractures with otic-capsule violation were 4 times more likely to have vestibular dysfunction (P = 0.043) and 3 times more likely to have SNHL (P = 0.006). FNP was not associated with otic-capsule violating fractures but was 3.5 times more common in comminuted fractures (P = 0.025). The degree of temporal bone pneumatization was negatively correlated to the incidence of otic-capsule violation and the severity of hearing impairment in patients with temporal bone fracture. This study substantiated the potential protective effect of temporal bone pneumatization in TBFs.
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This study aims to correlate the degree of pneumatization of the temporal bone with the severity of temporal bone fracture (TBF). Charts and computed tomography scans representing 54 TBFs, diagnosed from 2012 to 2017 at a single tertiary hospital, were retrospectively reviewed. Temporal bone pneumatization (TBP) in the petrous apex and mastoid region was evaluated using previously published classification systems. TBP classifications and fracture types were correlated with TBF complications such as sensorineural hearing loss (SNHL), facial nerve palsy (FNP), and vestibular dysfunction. Patients with increased pneumatization of the temporal bone had significantly fewer and less severe SNHL. SNHL more strongly correlated with the degree of pneumatization in the mastoid (P = 0.005) than that in the petrous apex (P = 0.024). On the other hand, the degree of TBP correlated poorly with FNP and vestibular dysfunction. However, the mastoid hypopneumatization demonstrated significant correlation with otic-capsule violations (P = 0.002). Fractures with otic-capsule violation were 4 times more likely to have vestibular dysfunction (P = 0.043) and 3 times more likely to have SNHL (P = 0.006). FNP was not associated with otic-capsule violating fractures but was 3.5 times more common in comminuted fractures (P = 0.025). The degree of temporal bone pneumatization was negatively correlated to the incidence of otic-capsule violation and the severity of hearing impairment in patients with temporal bone fracture. 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physiopathology</topic><topic>Complications</topic><topic>Computed tomography</topic><topic>Correlation analysis</topic><topic>Facial nerve</topic><topic>Facial Nerve - diagnostic imaging</topic><topic>Facial Nerve - physiopathology</topic><topic>Facial Paralysis - diagnostic imaging</topic><topic>Facial Paralysis - physiopathology</topic><topic>Female</topic><topic>Fractures</topic><topic>Fractures, Bone - diagnostic imaging</topic><topic>Fractures, Bone - physiopathology</topic><topic>Head injuries</topic><topic>Hearing loss</topic><topic>Hearing Loss - diagnostic imaging</topic><topic>Hearing Loss - etiology</topic><topic>Hearing Loss - physiopathology</topic><topic>Hearing Loss, Sensorineural - diagnostic imaging</topic><topic>Hearing Loss, Sensorineural - etiology</topic><topic>Hearing Loss, Sensorineural - physiopathology</topic><topic>Humans</topic><topic>Impact loads</topic><topic>Male</topic><topic>Mastoid - physiopathology</topic><topic>Medical prognosis</topic><topic>Medical records</topic><topic>Medicine and Health Sciences</topic><topic>Middle Aged</topic><topic>Otolaryngology</topic><topic>Otology</topic><topic>Paralysis</topic><topic>Prenatal development</topic><topic>Shock absorbers</topic><topic>Skull Fractures - 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This study aims to correlate the degree of pneumatization of the temporal bone with the severity of temporal bone fracture (TBF). Charts and computed tomography scans representing 54 TBFs, diagnosed from 2012 to 2017 at a single tertiary hospital, were retrospectively reviewed. Temporal bone pneumatization (TBP) in the petrous apex and mastoid region was evaluated using previously published classification systems. TBP classifications and fracture types were correlated with TBF complications such as sensorineural hearing loss (SNHL), facial nerve palsy (FNP), and vestibular dysfunction. Patients with increased pneumatization of the temporal bone had significantly fewer and less severe SNHL. SNHL more strongly correlated with the degree of pneumatization in the mastoid (P = 0.005) than that in the petrous apex (P = 0.024). On the other hand, the degree of TBP correlated poorly with FNP and vestibular dysfunction. However, the mastoid hypopneumatization demonstrated significant correlation with otic-capsule violations (P = 0.002). Fractures with otic-capsule violation were 4 times more likely to have vestibular dysfunction (P = 0.043) and 3 times more likely to have SNHL (P = 0.006). FNP was not associated with otic-capsule violating fractures but was 3.5 times more common in comminuted fractures (P = 0.025). The degree of temporal bone pneumatization was negatively correlated to the incidence of otic-capsule violation and the severity of hearing impairment in patients with temporal bone fracture. This study substantiated the potential protective effect of temporal bone pneumatization in TBFs.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>31150482</pmid><doi>10.1371/journal.pone.0217682</doi><orcidid>https://orcid.org/0000-0002-0259-8654</orcidid><oa>free_for_read</oa></addata></record>
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subjects Adult
Aged
Biology and Life Sciences
Bones
Classification
Classification systems
Cochlea - physiopathology
Complications
Computed tomography
Correlation analysis
Facial nerve
Facial Nerve - diagnostic imaging
Facial Nerve - physiopathology
Facial Paralysis - diagnostic imaging
Facial Paralysis - physiopathology
Female
Fractures
Fractures, Bone - diagnostic imaging
Fractures, Bone - physiopathology
Head injuries
Hearing loss
Hearing Loss - diagnostic imaging
Hearing Loss - etiology
Hearing Loss - physiopathology
Hearing Loss, Sensorineural - diagnostic imaging
Hearing Loss, Sensorineural - etiology
Hearing Loss, Sensorineural - physiopathology
Humans
Impact loads
Male
Mastoid - physiopathology
Medical prognosis
Medical records
Medicine and Health Sciences
Middle Aged
Otolaryngology
Otology
Paralysis
Prenatal development
Shock absorbers
Skull Fractures - diagnostic imaging
Skull Fractures - physiopathology
Studies
Surgery
Temporal bone
Temporal Bone - diagnostic imaging
Temporal Bone - physiopathology
Tomography, X-Ray Computed
Trauma
Vertigo
Vertigo - diagnostic imaging
Vertigo - physiopathology
Vestibular system
Volumetric analysis
title The potential protective effects of temporal bone pneumatization: A shock absorber in temporal bone fracture
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