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 ASSESSMENT OF MEAN DISTANCE OF MANDIBULAR INCISIVE CANAL USING CONE BEAM COMPUTERIZED TOMOGRAPHY; A CROSS-SECTIONAL STUDY

2021 ◽  
Vol 71 (5) ◽  
pp. 1801-05
Author(s):  
Mubashir Sharif ◽  
Nighat Haroon ◽  
Muhammad Anwaar Alam ◽  
Adil Umar Durrani ◽  
Talib Hussain ◽  
...  
Keyword(s):  
Computerized Tomography ◽  
Mental Foramen ◽  
Cross Sectional Study ◽  
Cone Beam ◽  
Sectional Study ◽  
Cross Sectional ◽  
Incisive Canal ◽  
Number Of Patients ◽  
Cone Beam Computerized Tomography ◽  
The Mean

Objective: To determine the mean distance of mandibular incisive canal from the mental foramen in patients reporting to a tertiary care centre using Cone Beam Computerized Tomography for placement of dental implants in the anterior/interforaminal region. Study Design: Cross-sectional study. Place and Duration of Study: Department of Prosthodontics, Foundation University College of Dentistry Rawalpindi, Jun to Nov 2019. Methodology: A total of 70 patients participated between the age of 20-45 years. Cone Beam Computerized Tomography (the investigation was carried out and measurements of the mandibular incisive canal from mental foramen were recorded with the help of measuring tools in the software and noted down on the proforma. Data were analyzed using SPSS-20. Results: The number of patients selected for this study was 70. Out of these 70 patients, 33 (47.1%) were males and 37 (52.9%) were females. The mean age of patients in this study was 36.31 ± 6.38 years. The mean distance/extension of the mandibular incisive canal from left mental foramen and right mental foramen in all patients was recorded to be 14.49 ± 6.31 mm and 14.97 ± 7.10 mm respectively. Conclusion: Within the limitations of this study, it is concluded that a maximum distance of 22mm of the incisive canal from the mental foramen was observed using cone-beam computerized tomography.

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.

scholarly journals 375. Cryptococcal Antigenemia in Advanced HIV Infection

2019 ◽  
Vol 6 (Supplement_2) ◽  
pp. S196-S196
Author(s):  
Jatin Ahuja ◽  
Manish Soneja ◽  
Naveet Wig ◽  
Immaculata Xess ◽  
Ashutosh Biswas ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Care Center ◽  
Tertiary Care ◽  
Latex Agglutination ◽  
Cd4 Count ◽  
North India ◽  
World Health ◽  
P Value ◽  
The Mean

Abstract Background Diagnostic importance of asymptomatic cryptococcal antigenemia is being increasingly recognized in the last few years. Recently, WHO (World Health Organization) has recommended routine screening of CrAg (cryptococcal antigen) among PLHA with CD4 ≤100/mm3, albeit this procedure is not yet adopted by many developing countries including India. Methods We conducted a prospective observational study in a large tertiary care center of North India, upon ethical clearance. Latex agglutination test was performed to assess serum CrAg levels, followed by the lumbar puncture for detection of CrAg levels in the CSF. We analyzed the prevalence and treatment outcomes of cryptococcal antigenemia among PLHA with CD4 ≤ 100 cells/mm3. Detailed clinical examination was conducted, with follow-up of upto 3 months. Multivariate analysis was performed for the estimation of risk factors. Results The mean age (years) and BMI (kg/m2) of all the participants were 41.4 ± 11.2 and 22.1 ± 2.6, respectively. Notably, the mean CD4 count (cu.mm) at the time of recruitment was 62.3 ± 20.5. Noteworthy, 62 (60.8%) of the patients were ART naïve. We found 9.8% (n = 10) of the patients were positive for serum CrAg, and only 2.9% (n = 3) had clinical features of meningitis and 6.8% (n = 7) were asymptomatic (subclinical) CrAg positive. Strikingly, 3.9% (n = 4) of the asymptomatic cryptococcal antigenemia patients were also positive for CrAg in CSF, with 1.9% (n = 2) were only serum CrAg positive, and 1 patient was lost to follow-up (Graph 1). Multivariate analysis revealed that patients with long duration of HIV (P = 0.04), headache symptoms (P = 0.004) and possessing features of meningismus (P value=0.08) are more likely to be CrAg positive. Conversely, patients on fluconazole were protective against cryptococcal antigenemia (P = 0.1) as shown in Table 1. Overall mortality observed was 11.3% among advanced HIV patients. Moreover, mortality in CrAg-positive patients was 33.3% in comparison to CrAg-negative patients who had 9% (P = 0.06) in 3-months follow-up. Conclusion Cryptococcal antigenemia is common (9.8%) among patients with CD4 count ≤100/mm3 in India. Screening for CrAg should be made routine for PLHA with CD4 count ≤100/mm3 and if required preemptive treatment to be given in this regard. Disclosures All authors: No reported disclosures.

scholarly journals Analysis of the mental foramen using cone beam computerized tomography

2015 ◽  
Vol 44 (4) ◽  
pp. 226-231 ◽  
Author(s):  
Kunihiro Saito ◽  
Ney Soares de Araújo ◽  
Miki Taketomi Saito ◽  
João de Jesus Viana Pinheiro ◽  
Pedro Luiz de Carvalho
Keyword(s):  
Computerized Tomography ◽  
Mental Foramen ◽  
Cone Beam ◽  
Critical Importance ◽  
Lower Margin ◽  
Anatomical Structures ◽  
A Value ◽  
Operative Planning ◽  
Cone Beam Computerized Tomography ◽  
Level Of Significance

<title>Abstract</title><sec><title>Introduction</title><p>Knowledge of the anatomical structures located in the region between the mental foramina is of critical importance in pre-operative planning.</p></sec><sec><title>Objective</title><p>To evaluate the position of the mental foramen relative to the apices of the teeth and the distance to the edges of the mandible, using cone beam computerized tomography.</p></sec><sec><title>Material and method</title><p>One hundred cone beam computerized tomographs of the mandible were evaluated; the tomographs were taken using a single tomographic device. Each image chosen was evaluated repeatedly from both sides of the mandible, the position of the mental foramen, indicating the region in which the foramen was found and the measures of the mental foramen, the lingual cortex and the mandibular base. Initially, the data were analyzed descriptively. A value of <italic>p</italic><0.05 was chosen as the level of significance.</p></sec><sec><title>Result</title><p>Forty-two percent of the mental foramina were located in the apex of the second pre-molar. The lingual margin of the mental foramen was located, on average, 3.1mm from the lingual cortex. The lower margin of the mental foramen was located 7.25 mm above the lower edge of the mandible.</p></sec><sec><title>Conclusion</title><p>The mental foramen was located more frequently at a level of the apices of the second pre-molars, with a distance to the lingual cortex, on average, of 3.1mm and to the base of the mandible, on average, of 7.25 mm.</p></sec>

Supine versus prone PCNL in lower calyceal stone: Comparative study in a tertiary care center

2020 ◽  
pp. 039156032096240
Author(s):  
Sunirmal Choudhury ◽  
Paragmani Talukdar ◽  
Tapan Kumar Mandal ◽  
Tapas Kumar Majhi
Keyword(s):  
Prone Position ◽  
Care Center ◽  
Tertiary Care ◽  
Renal Calculus ◽  
P Value ◽  
Tertiary Care Center ◽  
Stone Free Rate ◽  
The Mean ◽  
Hemoglobin Drop ◽  
Free Rate

Introduction: Renal calculus disease is an age old disease of human being. PCNL (Percutaneous nephrolithotomy) stands as a gold standard treatment for large renal calculus which is traditionally being done in prone position. Objective: To evaluate the safety and efficacy of supine PCNL versus prone PCNL comparing intraoperative time, requirement of relook PCNL, post op hemoglobin drop, post operative hospital stay, post operative complication, SFR ( stone free rate). Methods and materials: It is a prospective study done in Urology department in a tertiary care center in Eastern India between October 2017 and October 2018. A total of 84 patients with lower calyceal renal stones underwent PCNL, 42 of them in supine and 42 in prone position. Lower calyceal stone, size measuring 1 to 2 cm were included in the study. Results: The mean intra operative time was 91.76 min in supine group and 85.43 min in prone group with a p value of 0.115. The mean hemoglobin drop was 1.11 g/dl and 1.18 g/dl in supine and prone position, respectively ( p value 0.75). The mean post operative hospital stay was 4.1 and 3.86 days in supine and prone group ( p value 0.58), respectively. Two patients in each group require relook PCNL. Stone free rate at 1 month was 95.23% and 90.47% ( p value 0.9), respectively in case of supine and prone group. Conclusion: Supine PCNL is feasible, comparable to prone PCNL in respect to operative parameters with relatively higher stone free rate though statistically insignificant.

Prevalence and Length of the Anterior Loop of the Inferior Alveolar Nerve in Iranians

2017 ◽  
Vol 43 (5) ◽  
pp. 333-336 ◽  
Author(s):  
Maryam Rastegar Moghddam ◽  
Zeinab Davoudmanesh ◽  
Nasim Azizi ◽  
Vahid Rakhshan ◽  
Mahsa Shariati
Keyword(s):  
Anterior Part ◽  
Age Groups ◽  
Inferior Alveolar Nerve ◽  
Mental Foramen ◽  
Cone Beam ◽  
Anterior Border ◽  
Chi Square ◽  
Anterior Loop ◽  
Cone Beam Computerized Tomography ◽  
The Mean

The anterior loop of the inferior alveolar nerve is a sensitive anatomical feature that should be taken into account during installation of dental implants anterior to the mental foramen. This study was conducted to explore the controversy regarding prevalence and length. A total of 452 mandible quadrants of 234 patients (age: 50.1 ± 13.3 years, 113 males, 121 females) were studied using cone-beam computerized tomography. After reconstructing axial, frontal, and sagittal slices, the region between the most anterior point on the mental foramen and the most anterior part of the mandibular nerve was inspected for signs of anterior loop presence. If positive, the length of the anterior loop was measured in mm as the distance between the anterior border of mental foramen and the anterior border of the loop. Prevalence and length of the anterior loop were compared statistically between sexes and age groups. The anterior loop was observed in 106 quadrants (23.5% of 451 quadrants) of 95 patients (40.6% of 234 patients), of whom 11 had bilateral anterior loops. Prevalences were similar in males (41%) and females (39%, chi-square P =.791). The mean anterior loop length was 2.77 ± 1.56 mm (95% CI: 2.5–3.1 mm), without significant sex (regression beta = −0.159, P = .134) or age (beta = −0.059, P = .578) differences. The anterior loop might exist in about 40% of patients, regardless of their gender. The mean safe anterior distance from the anterior loop is about 3 mm + (2.5–3.1 mm) = 5.5–6.1 mm, regardless of age.

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 Assessing bone thickness in the infrazygomatic crest area aiming the orthodontic miniplates positioning: a tomographic study

2017 ◽  
Vol 22 (4) ◽  
pp. 70-76 ◽  
Author(s):  
Aline Rode Santos ◽  
Marcelo Castellucci ◽  
Iêda Margarida Crusoé-Rebello ◽  
Márcio Costa Sobral
Keyword(s):  
Computerized Tomography ◽  
Adult Male ◽  
Adult Patients ◽  
Cone Beam ◽  
Bone Thickness ◽  
Cross Sectional ◽  
Male And Female ◽  
Measurement Results ◽  
Cone Beam Computerized Tomography ◽  
The Mean

ABSTRACT Introduction: Due to the increasing use of miniplates for anchorage purposes in orthodontics, it is very important to know more about infrazigomatic crest anatomy (thickness), in adult patients. Objectives: Evaluate the infrazygomatic crest region thickness, in adult (male and female) patients. Methods: Cone-beam computerized tomography (CBCT) images from 40 patients were used to assess cross-sectional measurements of the infrazygomatic crest region. Measurement 1 considered thickness 2 mm above the distobuccal root of the permanent maxillary first molar, while measurement 2 was taken 2 mm above the first measurement. Results: The mean thickness of the infrazygomatic crest in males was 3.55 mm for measurement 1 and 2.84 mm for measurement 2, while in females these were 2.37 mm and 2.24 mm, respectively. Conclusion: The authors concluded that the overall mean thickness of the infrazygomatic crest was 2.49 mm with respect to measurement 1, and 2.29 mm for measurement 2, with no statistically significant differences between gender.

Accuracy of Cone Beam Computerized Tomography and a Three-Dimensional Stereolithographic Model in Identifying the Anterior Loop of the Mental Nerve: A Study on Cadavers

2012 ◽  
Vol 38 (6) ◽  
pp. 668-676 ◽  
Author(s):  
Ruben R. Santana ◽  
Jaime Lozada ◽  
Alejandro Kleinman ◽  
Aladdin Al-Ardah ◽  
Alan Herford ◽  
...  
Keyword(s):  
Computerized Tomography ◽  
Mean Difference ◽  
Cone Beam ◽  
Nerve Plexus ◽  
Mental Nerve ◽  
Stl Model ◽  
Anterior Loop ◽  
Significant Difference ◽  
Cone Beam Computerized Tomography ◽  
The Mean

The objective of this ex vivo cadaver study was to determine the accuracy of cone beam computerized tomography (CBCT) and a 3-dimensional stereolithographic (STL) model in identifying and measuring the anterior loop length (ANLL) of the mental nerve. A total of 12 cadavers (24 mental nerve plexus) were used for this study. Standardized CBCT scans of each mandible were obtained both with and without radiographic contrast tracer injected into the mental nerve plexus, and STL models of the two acquired CBCT images were made. The ANLL were measured using CBCT, STL model, and anatomy. The measurements obtained from the CBCT images and STL models were then analyzed and compared with the direct anatomic measurements. A paired sample t test was used, and P values less than .05 were considered statistically significant. The mean difference between CBCT and anatomic measurement was 0.04 mm and was not statistically significant (P = .332), whereas the mean difference between STL models and anatomic measurement was 0.4 mm and was statistically significant (P = .042). There was also a statistical significant difference between CBCT and the STL model (P = .048) with the mean difference of 0.35 mm. Therefore, CBCT is an accurate and reliable method in determining and measuring the ANLL but the STL model over- or underestimated the ANLL by as much as 1.51 mm and 1.83 mm, respectively.

scholarly journals Qualitative and quantitative assay of glucose 6 phosphate dehydrogenase in patients attending tertiary care center

2020 ◽  
Author(s):  
Uday Sharma ◽  
Satyendra Mishra ◽  
Narayan Gautam ◽  
Badri Kumar Gupta
Keyword(s):  
Qualitative Method ◽  
Care Center ◽  
Tertiary Care ◽  
Screening Method ◽  
Hemoglobin Concentration ◽  
P Value ◽  
Mean Corpuscular Hemoglobin ◽  
Hemolytic Crisis ◽  
The Mean ◽  
Glucose 6 Phosphate Dehydrogenase

Abstract Objectives The study was carried out to with the aim to find out the frequency of G6PD deficiency among the patients attending the hospital and to rationalize methemoglobin reduction test (Qualitative method) in reference to the spectrophotometric assay (Quantitative method). Timely screening of the patients for Glucose 6 phosphate dehydrogenase deficiency with appropriate screening method can play an important role in preventing hemolytic crisis that arises from therapeutic use of oxidative drugs like primaquine. Result The frequency of Glucose 6 phosphate dehydrogenase deficient cases was 3% by both of the employed tests. The mean ± SD of Glucose 6 phosphate dehydrogenase activity in the patients under study was 15.34 ± 4.7 IU/l in males, 16.01 ± 3.74 IU/l in females. G6PD activity was positively associated with reticulocyte count (r = 0.289, p-value = 0.004) and negatively with mean corpuscular hemoglobin concentration (r = -0.220, p-value = 0.028). The correlation of Red blood corpuscular count and Glucose 6 phosphate dehydrogenase was statistically significant (p-value = 0.048).

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