scholarly journals Automated measurement of pediatric cranial bone thickness and density from clinical computed tomography

2012 ◽  
Author(s):  
K. Smith ◽  
D. Politte ◽  
G. Reiker ◽  
T. S. Nolan ◽  
C. Hildebolt ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cranial Bone ◽  
Automated Measurement ◽  
Bone Thickness

scholarly journals A New Predictive Modality of Cranial Bone Thickness

1999 ◽  
Vol 42 (6) ◽  
pp. 651-657 ◽  
Author(s):  
Mohammed M. Elahi ◽  
Kenneth L. Watkin ◽  
M Suheil Hakim ◽  
Melvin D. Schloss ◽  
M Lucie Lessard
Keyword(s):  
Cranial Bone ◽  
Bone Thickness

scholarly journals Height difference between the vestibular and palatal walls and palatal width: a cone beam computed tomography approach

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
P. López-Jarana ◽  
C. M. Díaz-Castro ◽  
A. Falcão ◽  
C. Falcão ◽  
J. V. Ríos-Santos ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Bone Thickness ◽  
Height Difference ◽  
Mean Values ◽  
The Mean ◽  
Maxilla And Mandible ◽  
Palatal Bone ◽  
Two Parameters

Abstract Background The objective of this study was to measure two parameters involved in tri-dimensional implant planning: the position of the buccal and palatal bone wall and the palatal thickness. Methods Cone beam computed tomography (CBCT) images (Planmeca ProMax 3D) of 403 teeth (208 upper teeth and 195 lower teeth) were obtained from 49 patients referred to the Dental School of Seville from January to December 2014. The height difference between the palatal and buccal walls was measured on the most coronal point of both walls. The thickness of the palatal wall was measured 2 mm from the most coronal point of the palatal wall. Results The mean values in the maxilla were 1.7 ± 0.9 mm for central and lateral incisors, 2.2 ± 1.7 mm for canines, 1.6 ± 0.9 mm for premolars and 1.9 ± 1.5 mm for molars. In the lower jaw, the mean values were 1.3 ± 0.8 mm for incisors, 1.7 ± 1.2 mm for canines, 2.3 ± 1.3 mm for premolars, and 2.6 ± 1.7 mm for molars. In the upper jaw, more than 55% of maxillary teeth (excluding second premolars and molars) presented mean height differences greater than 1 mm. In the mandible, more than 60% of incisors showed a buccal bone thickness of 1 mm from the apical to lingual aspect. All teeth except the second premolar presented a buccal wall located more than 1 mm more apically than the lingual bone wall. Conclusions The buccal bone wall is located more apically (greater than 1 mm) than the palatal or lingual table in most of the cases assessed. The thickness of the palatal or lingual table is also less than 2 mm in the maxilla and mandible, except in the upper canines and premolars and the lower molars.

Mapping of palatal bone thickness using computed tomography for placement of mini screws — A comparative study between genders, adolescents and adults

2019 ◽  
Vol 78 (1) ◽  
pp. 18-25
Author(s):  
Soham Mallick ◽  
P.S. Murali ◽  
M.N. Kuttappa ◽  
Ashutosh Shetty ◽  
M.S. Ravi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Comparative Study ◽  
Bone Thickness ◽  
Adolescents And Adults ◽  
Palatal Bone

scholarly journals Reducing radiation exposure in newborns with birth head trauma

2017 ◽  
Vol 5 (4) ◽  
pp. 24-30
Author(s):  
Irina A. Kriukova ◽  
Evgeniy Y. Kriukov ◽  
Danil A. Kozyrev ◽  
Semen A. Sotniкov ◽  
Dmitriy A. Iova ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Radiation Exposure ◽  
Head Trauma ◽  
Bone Structure ◽  
Bone Fractures ◽  
Diagnostic Methods ◽  
Cranial Bone ◽  
X Ray ◽  
Reduce Radiation Exposure ◽  
Risk Of Cancer

Background. Birth head trauma causing intracranial injury is one of the most common causes of neonatal mortality and morbidity. In case of suspected cranial fractures and intracranial hematomas, diagnostic methods involving radiation, such as x-ray radiography and computed tomography, are recommended. Recently, an increasing number of studies have highlighted the risk of cancer complications associated with computed tomography in infants. Therefore, diagnostic methods that reduce radiation exposure in neonates are important. One such method is ultrasonography (US). Aim. We evaluated US as a non-ionizing radiation method for diagnosis of cranial bone fractures and epidural hematomas in newborns with cephalohematomas or other birth head traumas. Material and methods. The study group included 449 newborns with the most common variant of birth head trauma: cephalohematomas. All newborns underwent transcranial-transfontanelle US for detection of intracranial changes and cranial US for visualization of bone structure in the cephalohematoma region. Children with ultrasonic signs of cranial fractures and epidural hematomas were further examined at a children’s hospital by x-ray radiography and/or computed tomography. Results and discussion. We found that cranial US for diagnosis of cranial fractures and transcranial-transfontanelle US for diagnosis of epidural hematomas in newborns were highly effective. In newborns with parietal cephalohematomas (444 children), 17 (3.8%) had US signs of linear fracture of the parietal bone, and 5 (1.1%) had signs of ipsilateral epidural hematoma. Epidural hematomas were visualized only when US was performed through the temporal bone and not by using the transfontanelle approach. Sixteen cases of linear fractures and all epidural hematomas were confirmed by computed tomography. Conclusion. The use of US diagnostic methods reduced radiation exposure in newborns with birth head trauma. US methods (transcranial-transfontanelle and cranial) can be used in screening for diagnosis and personalized monitoring of changes in birth head trauma as well as to reduce radiation exposure.

scholarly journals Localized, time-dependent responses of rat cranial bone to repeated mild traumatic brain injuries

2021 ◽  
Author(s):  
Larissa K Dill ◽  
Natalie A Sims ◽  
Ali Shad ◽  
Chidozie Anyaegbu ◽  
Andrew Warnock ◽  
...  
Keyword(s):  
Brain Injuries ◽  
Bone Structure ◽  
Regions Of Interest ◽  
Cranial Bone ◽  
Micro Computed Tomography ◽  
Bone Thickness ◽  
Injury Site ◽  
Microstructural Alterations ◽  
Closed Head ◽  
Weight Drop

While it is well-established that bone responds dynamically to mechanical loading, the effects of mild traumatic brain injury (mTBI) on cranial bone composition are unclear. We hypothesized that repeated mTBI (rmTBI) would change the microstructure of cranial bones, without gross skull fractures. To address this, young adult female Piebald Viral Glaxo rats received sham, 1x, 2x or 3x closed-head mTBIs delivered at 24h intervals, using a weight drop device custom built for reproducible impact. Skull bones were collected at 2 or 10 weeks after the final injury/sham procedure, imaged by micro computed tomography and analyzed at predetermined regions of interest. In the interparietal bone, proximal to the injury site, modest increases in bone thickness was observed at 2 weeks, particularly following 3x mTBI. By 10 weeks, 2x mTBI induced a robust increase in the volume and thickness of the interparietal bone, alongside a corresponding decrease in the volume of marrow cavities in the diploe region. In contrast, neither parietal nor frontal skull samples were affected by rmTBI. Our findings demonstrate time- and location-dependent effects of rmTBI on cranial bone structure, highlighting a need to consider microstructural alterations to cranial bone when assessing the consequences of rmTBI.

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