Analysis of Mandibular Structure Using 3D Facial Computed Tomography

2014 ◽  
Vol 151 (5) ◽  
pp. 760-764 ◽  
Author(s):  
Su Young Jung ◽  
Seung Youp Shin ◽  
Kun Hee Lee ◽  
Young Gyu Eun ◽  
Young Chan Lee ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Tertiary Care ◽  
Retrospective Chart Review ◽  
Mental Foramen ◽  
Class I ◽  
3 Dimensional ◽  
Individual Variations ◽  
Inferior Border ◽  
Anterior Mandible ◽  
Superior Border

Objective This study measured and analyzed the position and dimension of genial tubercle (GT) and mental foramen (MF) Study Design Retrospective chart review study. Setting Tertiary care teaching hospital. Subjects and Methods Two hundred ten subjects were included who received 3-dimensional (3D) facial computed tomography (CT), and the GT and MF were evaluated. Subjects were divided into 4 groups by gender and skeletal type. Seven variables were measured: (1) height of GT (GTH), (2) width of GT (GTW), (3) distance from apices of lower incisors to superior border of GT (LI-SGT), (4) distance from inferior border of GT to inferior border of mandible (IGT-IBM), (5) thickness of anterior mandible (MT), (6) distance from symphysis of mandible to MF (S-MF), and (7) distance from superior border of GT to inferior border of mandible (SGT-IBM). Results All the parameters showed marked differences in individuals. Class I males showed longer GTH, MT, and SGT-IBM than class I females ( P < .05). IGT-IBM and S-MF were longer in class II males than in class I females ( P < .05). LI-SGT and IGT-IBM also showed personal variation. Conclusion Anatomical features of mandibular structures showed individual variations. GTH, IGT-IBM, MT, S-MF, and SGT-IBM also showed differences between the groups.

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

scholarly journals Mental foramen and accessory mental foramen: a dry human mandibles study in South Indian population

2018 ◽  
Vol 7 (04) ◽  
pp. 182-191
Author(s):  
Parineeta Suman ◽  
Sabita Singh ◽  
Raj Kishore Mahato
Keyword(s):  
Indian Population ◽  
Mental Foramen ◽  
The Body ◽  
South Indian Population ◽  
Anatomical Features ◽  
Accessory Mental Foramen ◽  
South Indian ◽  
Mandibular Body ◽  
Inferior Border ◽  
Superior Border

Abstract Introduction and aim: Mandible usually has a bilateral oval or circular mental foramen [MF] situated on the anterolateral aspect of the body of mandible. Variations of the MF are often encountered ranging from difference in incidence, shape, size, position and supernumerary [accessory MF] to even complete absence. So, the aim of the present study was to evaluate the incidence and the anatomical features of the mental foramen and the accessory mental foramen. Materials & method: 61 dry human mandibles of unknown sex were examined. Size and distance of mental foramen and accessory mental foramen from symphysis menti [Mandibular midline], inferior border of the mandible, posterior border of ramus and superior border of body of mandible were measured using vernier calliper and statistically analyzed by mean and standard deviation. Results: Bilateral mental foramina [MF] were present in all 61 [100%] mandibles. Out of 122 mental foramina [MF], 86 [70.5%] were round and 36 [29.5%] were oval in shape. Approximately half [47.54%] of MF were present below the apex of 2nd premolar tooth. MF was located approximately half way between alveolar crest and mandibular body. Bilateral AMF were present in 1.64% mandibles. All 5 AMFs were round in shape. AMF was separated from MF by a median distance of 2mm. Conclusion: The knowledge about incidence and variability in position of mental foramen and accessory mental foramen is important in order to avoid nerve damage in connection with surgical procedure and to achieve complete effect of anaesthesia after mental nerve block

scholarly journals Dimension and Location of the Mandibular Lingula: Comparisons of Gender and Skeletal Patterns Using Cone-Beam Computed Tomography

2020 ◽  
Vol 2020 ◽  
pp. 1-6 ◽  
Author(s):  
Kun-Jung Hsu ◽  
Yu-Chuan Tseng ◽  
Shih-Wei Liang ◽  
Szu-Yu Hsiao ◽  
Chun-Ming Chen
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Class I ◽  
Cone Beam ◽  
Horizontal Distance ◽  
Class Iii ◽  
Posterior Border ◽  
Mandibular Foramen ◽  
External Oblique ◽  
Inferior Border

Objective. The study aimed to investigate and measure the anatomical relationship between the mandibular lingula (Li) and skeletal patterns using cone-beam computed tomography (CBCT). Materials and Methods. In total, 72 participants (23 men and 49 women) were categorized into three groups according to their skeletal patterns (specifically, the A point–nasion–B point (ANB]) angle) as follows: Class I (0° < ANB < 4°), Class II (ANB ≥ 4°), and Class III (ANB ≤ 0°). The CBCT images of 144 rami were collected, and the distance from the Li to the external oblique ridge (Li-EOR), internal oblique ridge (Li-IOR), posterior border of the ramus (Li-PBR), inferior border of the ramus (Li-IBR), sigmoid notch (Li-Sm), and mandibular foramen (Li-MF) was examined. The Li-hMF (horizontal distance from the Li to the MF) and Li-vMF (vertical distance from the Li to the MF) were measured. The comparisons of gender, side (right and left), and skeletal patterns were then evaluated by statistical analysis. Results. The values of the Li-EOR and Li-PBR (19.99 mm and 15.93 mm, respectively) were significantly higher in men than in women (18.85 mm and 14.89 mm, respectively). Moreover, the Li-IBR was higher in men (32.91 mm) than in women (30.40 mm). Both sides (right and left) and skeletal patterns demonstrated that the Li-EOR, Li-IOR, and Li-PBR were not significantly different. Pearson’s correlation test reported a strong correlation between the Li-EOR and Li-IOR (r=0.610). Conclusion. The distances from mandibula lingula to the external oblique ridge, posterior border of ramus, and inferior border of ramus were significantly longer in men than in women. Similarly, both horizontal and vertical distances from the lingula to the mandibular foramen were significantly longer in men than in women. Therefore, the results demonstrated that the Li was longer and more protruding in men than in women. With respect to the horizontal distance from the mandibular lingula to the mandibular foramen, of the three types of the skeletal system (Class I, Class II, and Class III), Class III was the significantly largest.

scholarly journals Cone-Beam Computed Tomography Evaluation of Mental Foramen Variations: A Preliminary Study

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Mahnaz Sheikhi ◽  
Mitra Karbasi Kheir ◽  
Ehsan Hekmatian
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Mental Foramen ◽  
Cone Beam ◽  
Vertical Position ◽  
3 Dimensional ◽  
The Mean ◽  
The Right ◽  
Common Shape ◽  
Surgical Operations

Background. Mental foramen is important in surgical operations of premolars because it transfers the mental nerves and vessels. This study evaluated the variations of mental foramen by cone-beam computed tomography among a selected Iranian population.Materials and Methods. A total number of 180 cone-beam computed tomography projections were analyzed in terms of shape, size, direction, and horizontal and vertical positions of mental foramen in the right and left sides.Results. The most common shape was oval, opening direction was posterior-superior, horizontal position was in line with second premolar, and vertical position was apical to the adjacent dental root. The mean of foremen diameter was 3.59 mm.Conclusion. In addition to the most common types of mental foramen, other variations exist, too. Hence, it reflects the significance of preoperative radiographic examinations, especially 3-dimensional images to prevent nerve damage.

scholarly journals Evaluation of location and dimensions of genial tubercle in patients with class I and II occlusion with cone bean computed tomography images

2019 ◽  
Author(s):  
Fateme Ezoddini-Ardakani ◽  
Soghra Yasaei ◽  
Khalil Sarikhani khoram ◽  
Nasim RouhiNejad
Keyword(s):  
Computed Tomography ◽  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Obstructive Sleep Apnea Syndrome ◽  
Sleep Apnea Syndrome ◽  
Class I ◽  
Obstructive Sleep ◽  
Apnea Syndrome ◽  
Inferior Border ◽  
Genial Tubercle

Introdution: Obstructive sleep apnea syndrome has potentially significant physiological and psychological consequences. The main method to control the obstructive sleep apnea syndrome is surgical advancement of genioglossus muscle (GA) or genial tubercle (GTA). Therefore, for pre-operation arrangements, surgeons definitely need to know the exact location of genial tubercle and the muscles attached to it. The aim of this study was to evaluate the location and dimensions of genial tubercle in the patients with class I and II occlusion with cone bean computed tomography (CBCT). Methods:In this descriptive cross-sectional study, cone bean computed tomographyimages of 152 adults (76 males and 76 females) with class I and II occlusion were inspected and the location and dimensions of genial tubercle (Height =GTH / Width=GTW / the distance between the apices of central teeth and the Superior border of genial tubercle=LI-SGT / the distance between the inferior border of genial tubercle and the inferior border of mandible= IGT-IBM / the anterior diameter of mandible = MT) were evaluated. Patients were classified based on their gender and occlusion type.Independent Kolmogorov-Smirnov tests were used for data analysis and thedata analyzed using SPSS16 software. Results:In all the groups, GTH was located near GTW. The measured data for GTH, GTW, LI-SGT, IGT-IBM and MT were 8.6-06 .57 mm, 8.6-19.47 mm, 7.6-13.56 mm, 8.7-47.40 mm, and 14.11-57.78 mm, respectively. No significant difference was indicated for GTW and LI-SGT based on malocclusion and for LI-SGT based on gender (P>0.05). Conclusion:Various locations and different size of this structure among patients imply that it is necessary for treatment of obstructive sleep apnea to obtain a CBCT image before surgical operation

scholarly journals CBCT Assessment of Mental Foramen Position Relative to Anatomical Landmarks

2016 ◽  
Vol 2016 ◽  
pp. 1-4 ◽  
Author(s):  
Mahnaz Sheikhi ◽  
Mitra Karbasi Kheir
Keyword(s):  
Mental Foramen ◽  
Anatomical Landmarks ◽  
Cross Sectional ◽  
Gender And Age ◽  
Significant Difference ◽  
The Mean ◽  
Edentulous Patients ◽  
Inferior Border ◽  
The Right ◽  
Superior Border

Purpose. This study was carried out on an Iranian population aiming to investigate mental foramen position relative to inferior border of mandible and skeletal midline and its gender and age differences on CBCT projections. Materials and Methods. A number of 180 CBCT images of patients were analyzed in different planes (tangential, cross-sectional, and axial). The distances from the superior border of mental foramen to the inferior border of mandible and from the anterior border of mental foramen to the midline were calculated. Results. The mean distance from mental foramen to the inferior border of mandible in the right side was 13.26 mm (SD ± 2.34) and in the left side was 13.37 mm (SD ± 2.19). There was a statistically significant difference between genders in terms of the distance between mental foramen and inferior border of mandible (P value = 0.000). The mean distances from mental foramen to midline were 25.86 mm (SD ± 0.27) and 25.53 mm (SD ± 0.31) in the right and left sides, respectively. Conclusions. The vertical and horizontal positions of mental foramen can be determined from stable anatomical landmarks such as mandibular inferior border and skeletal midline in both dentulous and edentulous patients. The distance from the superior border of mental foramen to the inferior border of mandible exhibited sexual dimorphism.

Prevalence, Correlates and Management of Hyperglycemia in Diabetic Non-critically Ill Patients at a Tertiary Care Center in Lebanon

2019 ◽  
Vol 15 (2) ◽  
pp. 133-140 ◽  
Author(s):  
Ghada El Khoury ◽  
Hanine Mansour ◽  
Wissam K. Kabbara ◽  
Nibal Chamoun ◽  
Nadim Atallah ◽  
...  
Keyword(s):  
Hospital Stay ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
Care Center ◽  
Descriptive Analysis ◽  
Tertiary Care ◽  
Multivariable Analysis ◽  
Length Of Hospital Stay ◽  
Retrospective Chart Review ◽  
Diabetic Patients

Background: Diabetes Mellitus is a chronic metabolic disease that affects 387 million people around the world. Episodes of hyperglycemia in hospitalized diabetic patients are associated with poor clinical outcomes and increased morbidity and mortality. Therefore, prevention of hyperglycemia is critical to decrease the length of hospital stay and to reduce complications and readmissions. Objective: The study aims to examine the prevalence of hyperglycemia and assess the correlates and management of hyperglycemia in diabetic non-critically ill patients. Methods: The study was conducted on the medical wards of a tertiary care teaching hospital in Lebanon. A retrospective chart review was conducted from January 2014 until September 2015. Diabetic patients admitted to Internal Medicine floors were identified. Descriptive analysis was first carried out, followed by a multivariable analysis to study the correlates of hyperglycemia occurrence. Results: A total of 235 medical charts were reviewed. Seventy percent of participants suffered from hyperglycemia during their hospital stay. The identified significant positive correlates for inpatient hyperglycemia, were the use of insulin sliding scale alone (OR=16.438 ± 6.765-39.941, p=0.001) and the low frequency of glucose monitoring. Measuring glucose every 8 hours (OR= 3.583 ± 1.506-8.524, p=0.004) and/or every 12 hours (OR=7.647 ± 0.704-79.231, p=0.0095) was associated with hyperglycemia. The major factor perceived by nurses as a barrier to successful hyperglycemia management was the lack of knowledge about appropriate insulin use (87.5%). Conclusion: Considerable mismanagement of hyperglycemia in diabetic non-critically ill patients exists; indicating a compelling need for the development and implementation of protocol-driven insulin order forms a comprehensive education plan on the appropriate use of insulin.

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