scholarly journals Cone Beam Computerized Tomography Measurement of Alveolar Ridge at Posterior Mandible for Implant Graft Estimation

2015 ◽  
Vol 41 (6) ◽  
pp. e231-e237 ◽  
Author(s):  
Wenjian Zhang ◽  
Justin Tullis ◽  
Robin Weltman
Keyword(s):  
Computerized Tomography ◽  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Cone Beam ◽  
Cortical Plate ◽  
Alveolar Ridge ◽  
Alveolar Crest ◽  
Mandibular Molar ◽  
Cone Beam Computerized Tomography ◽  
Inferior Border

Damaging the inferior alveolar nerve (IAN) is the most serious complication when harvesting an autogenous graft from posterior mandible. The objective of this study was to use cone beam computerized tomography (CBCT) to measure dimensions of the alveolar ridge in the posterior mandible for estimation of a safe graft size, and then analyze how it is related to the gender, age, and dentition status of subjects. CBCT scans were screened to include 59 subjects without interfering pathologies. Alveolar height was measured from the alveolar crest to superior border of IAN and also to the inferior border of the mandible. Alveolar width (from buccal to lingual cortical plates) and buccal bone thickness (from buccal cortical plate to mandibular molar mesial root buccal surface) were measured at the coronal, middle, and apical thirds divided from the alveolar crest to the IAN. It was found that males and dentate sites had larger alveolar dimensions than did females and edentulous sites, respectively. Bone volume did not correlate significantly with age. Buccal bone thicknesses increased from coronal to apical and from the first to the third molar generally. A larger bone graft could be harvested from male than female patients, with a mean harvestable graft dimension (height × width in mm) for male was 15.5 × 3.2, and for female was 14.1 × 2.9. In conclusion, males and dentate arches demonstrate larger alveolar volumes than do females and edentulous regions, respectively. Larger alveolar grafts can be harvested from males compared to the females. Age does not seem to affect alveolar dimension/graft volume.

scholarly journals Assessment of Location of Mental Foramen in Mandible Using Cone Beam Computerized Tomography

2020 ◽  
Vol 10 (4) ◽  
pp. 291-295
Author(s):  
Shoaib Rahim ◽  
Maria Shakoor ◽  
Ali Qureshi
Keyword(s):  
Computerized Tomography ◽  
Care Center ◽  
Tertiary Care ◽  
Mental Foramen ◽  
Cone Beam ◽  
P Value ◽  
Mandibular Symphysis ◽  
Cone Beam Computerized Tomography ◽  
The Mean ◽  
Inferior Border

Objective: To determine the mean distance of mental foramen from the base of the mandible and mandibular symphysis in patients reporting to tertiary care center using Cone Beam Computerized Tomography (CBCT). Study design and setting: Cross-Sectional Study was carried out in the Prosthodontics Department, Foundation University College of Dentistry, Islamabad from March 2019 to August 2019. Methodology: Total 100 patients between the age of 20-45 years were participated. CBCT investigation was carried out and measurements of mental foramen from the base of the mandible and mandibular symphysis in patients were recorded with the help of measuring tools in the software and noted down on the performa. SPSS version 20 was used analyze the data. P value less than 0.05 was considered as statistically significant. . Frequency and percentages were calculated for variable gender (qualitative). For quantitative variables like age, distance mental foramen from the mandibular Symphysis and inferior border of mandible, mean + SD were calculated. Independent samples t-test was used to compare quantitative variables like distance MF from the mandibular symphysis/midline and inferior border of mandible. P values < 0.05 was considered as statistically significant. Results: The Mean+SD distance of anterior border of mental foramen from symphysis on left and right side were 24.12+2.835 and 24.88+2.637 and from the lower border of mandible were 11.97+1.359 and 12.00+1.764 respectively. Conclusion: The mean vertical and horizontal distances calculated in this study can provide a useful guide to dentist to safely place dental implants within the inter-foraminal region in our population

Third-molar impaction diagnostic with cone-beam computerized tomography

2005 ◽  
Vol 1281 ◽  
pp. 1196-1199 ◽  
Author(s):  
Reyes Enciso ◽  
Robert A. Danforth ◽  
Emanuel S. Alexandroni ◽  
Ahmed Memon ◽  
James Mah
Keyword(s):  
Computerized Tomography ◽  
Third Molar ◽  
Cone Beam ◽  
Cone Beam Computerized Tomography

scholarly journals Evaluation of the Anastomosis Canal in Lateral Maxillary Sinus Wall With Cone Beam Computerized Tomography: A Clinical Study

2018 ◽  
Vol 44 (1) ◽  
pp. 5-13
Author(s):  
Wentao Sun ◽  
Anhao Liu ◽  
Yin Gong ◽  
Rong Shu ◽  
Yufeng Xie
Keyword(s):  
Clinical Study ◽  
Computerized Tomography ◽  
Lateral Wall ◽  
Cone Beam ◽  
Lateral Sinus ◽  
Lower Border ◽  
Alveolar Crest ◽  
Sinus Wall ◽  
Sinus Floor ◽  
Cone Beam Computerized Tomography

This clinical study used cone beam computerized tomography (CBCT) to locate the position of the anastomosis canal in lateral wall of maxillary sinuses, and to evaluate the thickness of lateral sinus wall and the distance from the lower border of the canal to the sinus floor, which could provide surgeon with information about this anastomosis. Two hundred and forty-two (242) volumes of CBCT scans were included in this study. The distances from the lower border of the anastomosis canal to the sinus floor and from the maxillary alveolar crest to the sinus floor were evaluated in transversal plane, and the thickness of the lateral sinus wall was measured at the distance of 3, 6, 9 mm from the sinus floor and at the level of the lower border of the canal at the same plane. The canal was identified in 87.6% (424/484) of the sinus. Most canals were intraosseous, or beneath the sinus membrane. The mean distance was 9.2 ± 3.5 mm from the lower border of the canal to the sinus floor, and 10.8 ± 4.0 mm from the alveolar crest to the sinus floor. The thickness of the lateral sinus wall was 2.4 ± 0.9 mm, 1.8 ± 0.8 mm, 1.7 ± 0.7 mm, 1.8 ± 0.8 mm at the distance of 3, 6, 9 mm from the sinus floor and at the level of the lower border of the canal. The location of the anastomosis canals varied from each patient, but the distance from the sinus floor was similar in different teeth sites. The sinus floor could be an anatomic landmark of sinus floor augmentation. In order not to interrupt this canal, great care must be taken by the implant surgeon to identify this canal.

Assessment of the Anterior Loop of the Mental Nerve Using Cone Beam Computerized Tomography Scan

2015 ◽  
Vol 41 (6) ◽  
pp. 632-639 ◽  
Author(s):  
Chun-I Lu ◽  
John Won ◽  
Aladdin Al-Ardah ◽  
Ruben Santana ◽  
Dwight Rice ◽  
...  
Keyword(s):  
Computerized Tomography ◽  
Age Groups ◽  
Inferior Alveolar Nerve ◽  
Mental Foramen ◽  
Cone Beam ◽  
Mental Nerve ◽  
Anterior Loop ◽  
Significant Difference ◽  
Cone Beam Computerized Tomography ◽  
The Mean

The purpose of this study is to use cone-beam computerized tomography (CBCT) scans with oblique-transverse reconstruction modality to measure and compare the anterior loop length (AnLL) of the mental nerve between gender and age groups and to compare the difference between the right and left sides. Sixty-one female and 61 male CBCT scans were randomly selected for each age group: 21–40, 41–60, and 61–80 years. Both right- and left-side AnLLs were measured in each subject using i-CATVision software to measure AnLLs on the oblique transverse plane using multiplanar reconstruction. The anterior loop was identified in 85.2% of cases, with the mean AnLL of the 366 subjects (732 hemimandibles) being 1.46 ± 1.25 mm with no statistically significant difference between right and left sides or between different gender groups. However, the mean AnLL in the 21–40 year group (1.89 ± 1.35 mm) was larger than the AnLL in the 41–60 year group (1.35 ± 1.19 mm) and the 61–80 year group (1.13 ± 1.08 mm). In conclusion, when placing implants in close proximity to mental foramina, caution is recommended to avoid injury to the inferior alveolar nerve. No fixed distance anteriorly from the mental foramen should be considered safe. Using CBCT scans with the oblique-transverse method to accurately identify and measure the AnLL is of utmost importance in avoiding and protecting its integrity.

Third molar evaluation with cone-beam computerized tomography

2006 ◽  
Vol 1 (2) ◽  
pp. 113-116 ◽  
Author(s):  
Reyes Enciso ◽  
Robert A. Danforth ◽  
Emanuel S. Alexandroni ◽  
Ahmed Memon ◽  
James Mah
Keyword(s):  
Computerized Tomography ◽  
Third Molar ◽  
Cone Beam ◽  
Cone Beam Computerized Tomography

scholarly journals Evaluation of Juxta-Apical Radiolucency as a Risk Factor for Inferior Alveolar Nerve Damage: A Cone-Beam Computed Tomography (CBCT) Study

2020 ◽  
Vol 21 (10) ◽  
Author(s):  
Leila Khojastepour ◽  
Mohammad Ghasemi ◽  
Shabnam Rasti ◽  
Mahvash Hasani
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Cross Sectional Study ◽  
Cone Beam ◽  
Cortical Plate ◽  
Third Molar Surgery ◽  
Cross Sectional ◽  
The Relationship

Background: Injuries to the lingual and inferior alveolar nerves (IAN) through third molar surgery are common and complicated clinical problems. Juxta-apical radiolucency (JAR) is one of the new radiographic signs, suggestive of IAN damage. Objectives: This study aimed to assess the relationship between JAR and IAN and to determine its effects on the cortical plate. Methods: In this cross-sectional study, after evaluating an initial sample of 450 cases, the cone-beam computed tomography (CBCT) images of 20 patients with JAR were compared with those of 20 age-matched patients without JAR in the axial and multi-planar images. The relationship between JAR and IAN was evaluated, and thinning of the mandibular cortical plates was also investigated. Statistical analysis was performed using descriptive tests and chi-square test in SPSS version 23. Results: The relationship between JAR and IAN was statistically significant (P = 0.001). The cortical plates were perforated in 75% of cases with JAR as opposed to 45% of cases without JAR (P = 0.06). The relationship between the location of JAR and IAN was also significant (P = 0.004). Conclusions: Based on the present results, JAR was associated with IAN in most cases. Thinning of the cortical plates was observed in all cases of JAR.

scholarly journals Radiographic assessment of mandibular canal in Nepalese population: a study based on cone beam computed tomography images

2019 ◽  
Vol 9 (4) ◽  
pp. 52-56
Author(s):  
Pragya Shrestha ◽  
Dil Islam Mansur ◽  
Manoj Humagain ◽  
Sushmit Koju ◽  
Sunima Maskey
Keyword(s):  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Mandibular Canal ◽  
The Body ◽  
Cone Beam ◽  
Cortical Plate ◽  
Second Molar ◽  
Computed Tomography Images ◽  
Adjacent Structures ◽  
Relationship Of

Background: Mandibular canal runs in the body and ramus of mandible and provides pas­sage for inferior alveolar nerve. Knowledge on spatial relationship of canal with adjacent structures prevent damage to nerve during surgical procedures. This study aims to find three-dimensional relationship of canal as well as its relation with third molar. Methods: This was a cross sectional and retrospective study conducted on Cone Beam Com­puted Tomography images. The relation and position of canal with third molar and position of canal in vertical and horizontal dimensions were analyzed. Results: Mandibular canal was found to be progressively descended in 43% of the canals. The canal was located apical to third molar in 61.9% cases and regarding contact relation, 121(56%) of the third molars had no contact with the canal. Buccal cortical plate was maxi­mum at the level of distal root of second molar and minimum at the level of mesial root of first molar and was reverse for lingual cortical plate. The highest distance between upper border of canal and inferior border of mandible was at mental foramen 13.55±2.27 mm and lowest at mesial root of second molar, 8.72±2.59 mm. Minimum distance between superior border of canal and alveolar crest was distal to second molar (13.78±3.54 mm) and maximum between first molar and second premolar (17.91±3.08 mm). Conclusions: It was observed that canal was interradicularly placed and was by penetrated by third molar in some cases. Thickness of cortical plates varied in various locations buccally and lingually.

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