CT evaluation of normal bone thickness overlying the superior semicircular canal

Kaur, Taranjit; Johanis, Michael; Miao, Tyler; Yang, Isaac; Duong, Courtney; Sun, Matthew Z.; Ferraro, Regan; Salamon, Noriko; McArthur, D.A.; Yang, Isaac; Gopen, Quinton

doi:10.1016/j.jocn.2019.05.001

Cited by 14 publications

(7 citation statements)

References 28 publications

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“…Compared with traditional methods, cone-beam computed tomography (CBCT) could overcome these shortcomings and measure the inclination as well as alveolar bone thickness of teeth with great accuracy on different levels and dimensions ( 33 , 34 ). CT is nowadays a widely used technique used for the evaluation of normal bone thickness of various anatomical structures, for bone pathology diagnostics and surgical planning ( 35 , 36 ). In case of dentistry, CT cortical bone thickness evaluation is utilized in many diagnostic and therapeutic procedures.…”

Section: Discussionmentioning

confidence: 99%

Use of Micro-CT Imaging to Assess Ventral Mandibular Cortical Thickness and Volume in an Experimental Rodent Model With Chronic High-Phosphorus Intake

et al. 2021

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Adverse effects of high dietary phosphorus on bone health have been observed in both animal and human studies. The aim of the investigation was to examine chronic effects of high phosphorus diet on the apical mandibular cortical thickness and volume in a hystricomorph rodent (Octodon degus) using microcomputed tomography. Male degus were randomly divided into two groups fed by different mineral contents from the age of 12 weeks till the age of 17 months. The micro-CT scanning and wall thickness analysis were applied on the region of the mandible exactly under the apices of the 4th premolar tooth, first molar tooth, and second molar tooth in two animals from each group. General overview and mapping of the ventral mandibular bone thickness revealed pronounced bony mandibular protrusions in all the animals fed a high-phosphorus diet with obvious bone thinning apically to the 4th premolar and first and second molar tooth apices. Mandibular bone volume and thickness located apically to the premolar and molars were statistically significantly smaller/thinner in the group fed by a high phosphorus diet. The thinnest bone measured 0.004 mm, where the mandibular 4th premolar tooth almost perforated the mandibular cortex. Similar studies of metabolic bone disease and its influence on alveolar bone were also published in rats and mice. The influence of different environmental, infectious, or metabolic factors on the growing tooth, alveolar bone formation, and bone pathologies must be done experimentally on growing animals. In contrast, degus have continuously growing dentition, and the effect of any of the above listed factors can be studied in this animal model at any age and for longer time periods.

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Section: Discussionmentioning

confidence: 99%

Use of Micro-CT Imaging to Assess Ventral Mandibular Cortical Thickness and Volume in an Experimental Rodent Model With Chronic High-Phosphorus Intake

et al. 2021

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“…Judging as to what is a thinning can be subjective, and there is no consensus as yet as to what are the physical dimensions of such thinning. For example, Ward ( 45 ) considers thinning as a thin strip of bone in their study with adults, whilst Kaur ( 43 ) after measuring actual semicircular canal bone thickness observed that thickness ranged from 0.4 to 2.08 mm with an average of about 1.5 mm. Meicklejohn ( 26 ) in children above the age of 4 years reported similar observations.…”

Section: Discussionmentioning

confidence: 99%

“…The scans were analyzed by one of the co-authors (SA) who is a senior radiologist specializing in pediatric head and neck radiology. The thickness of the semicircular canal walls was measured and a thickness of at or <0.5 mm in at least 2 planes was deemed as a thin semicircular wall or a near dehiscence (26,43). HRCT provided the final direct visual confirmation of the rare third windows in the children in the series.…”

Section: Imagingmentioning

confidence: 99%

Audiovestibular Quantification in Rare Third Window Disorders in Children

et al. 2020

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“…Thin bone, or thinning instead of complete dehiscence of the bone overlaying the SSC, can also lead to the onset of vestibulocochlear symptoms [ 3 , 33 ]. Interestingly, previous studies have found no association between thin bone and age or gender, as it has been hypothesized that these two factors could contribute to osteoporosis leading to SSCD [ 13 , 23 ]. Systematic analysis has also shown age and gender to not be predictors of symptom outcomes postoperatively [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Superior semicircular canal dehiscence postoperative outcomes: a case series of 350 repairs

Mekonnen,

Lum,

Duong

et al. 2024

Acta Neurochir

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Background Superior Semicircular Canal Dehiscence (SSCD) is a dehiscence of the otic capsule which normally lies over the superior semicircular canal. This database constitutes the largest series of SSCD patients to date. Objective To determine what preoperative factors, if any, contribute to postoperative outcomes and evaluate symptom resolution in a large SSCD patient cohort. Methods A single-institution, retrospective chart review collected patient demographics, intraoperative findings, and pre-and postoperative symptoms. Fisher's exact t-test was performed for unpaired categorical variables, with a significance level of p < 0.05. Results 350 SSCD repairs were performed. The median age was 52 years (range: 17—86 years, ± 6.4 years), and the median follow-up duration was 4.6 months (range: 0.03—59.5 months, ± 6.8 months). Preoperative hearing loss was significantly associated with female sex (p = 0.0028). The most reported preoperative symptoms were tinnitus (77.4%), dizziness (74.0%), autophony (66.3%), amplification (63.7%), and disequilibrium (62.6%). Between patients who received unilateral versus bilateral SSCD repair, the greatest postoperative symptomatic resolution was seen in autophony (74.9%, p < 0.001), amplification (77.3%, p = 0.00027), hyperacusis (77.4%, p = 0.023), hearing (62.9%, p = 0.0063), and dizziness (54.6%, p < 0.001) for patients with unilateral SSCD repair. Conclusion Surgical repair via the middle cranial fossa approach can significantly resolve auditory, vestibular, and neurological symptoms of patients with SSCD. Although this is one of the largest single-institution SSCD studies to date, future multi-institutional, prospective studies would be beneficial to validate these results.

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CT evaluation of normal bone thickness overlying the superior semicircular canal

Cited by 14 publications

References 28 publications

Use of Micro-CT Imaging to Assess Ventral Mandibular Cortical Thickness and Volume in an Experimental Rodent Model With Chronic High-Phosphorus Intake

Use of Micro-CT Imaging to Assess Ventral Mandibular Cortical Thickness and Volume in an Experimental Rodent Model With Chronic High-Phosphorus Intake

Audiovestibular Quantification in Rare Third Window Disorders in Children

Superior semicircular canal dehiscence postoperative outcomes: a case series of 350 repairs

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