scholarly journals Intra-Oral Ultrasonography of Young Adult Mandibular Foramen: A Reliable Method

2021 ◽  
Vol 18 (3) ◽  
Author(s):  
Mojdeh Mehdizadeh ◽  
Negar Baharlouei ◽  
Hossein Taheri
Keyword(s):  
Color Doppler ◽  
Inferior Alveolar Nerve ◽  
Occlusal Plane ◽  
Accurate Information ◽  
Ultrasound Images ◽  
Cross Sectional ◽  
Mandibular Foramen ◽  
The Mean ◽  
Ultrasound System ◽  
The Right

Background: The inferior alveolar nerve (IAN) block is the most commonly used mandibular injection method for local anesthesia in restorative and surgical procedures. Ultrasound images can provide more accurate information about the location of the inferior alveolar neurovascular bundle. Objectives: This study aimed to evaluate the ultrasound images of patients to determine the location of the mandibular foramen (MF) relative to the adjacent landmarks. Patients and Methods: In this cross-sectional analytical study, 50 patients were subjected to intra-oral ultrasonography of the right and left sides of the mandible. An Alpinion ultrasound system (Seoul, South Korea) was used for detecting the MF, as well as its distance from different landmarks. Results: In all patients, the MF was found using color Doppler ultrasonography. The probability of detecting MF in conventional ultrasonography was estimated at 36% and 18% for the right and left sides of the mandible without using the Doppler technique, respectively. The mean MF distance from the anterior border of the ramus was 14.6 ± 2.1 and 16.1 ± 2.1 mm on the right and left sides, respectively. Also, the vertical distance of MF from the occlusal plane was 7.5 ± 1.1 mm on the right side and 8.7 ± 1.2 mm on the left side of the mandible. In all studied patients, the MF was above the occlusal plane. Conclusion: The results of this study showed that ultrasonography is not only a suitable option for intra-oral imaging due to its non-ionizing beams, but is also appropriate for localization of the MF and its related landmarks.

ANATOMICAL STUDY OF MANDIBULAR FORAMEN IN DRY ADULT HUMAN MANDIBLES IN BIHAR STATE REGION

2021 ◽  
pp. 34-36
Author(s):  
Vijay Kumar Singh ◽  
Md. Zahid Hussain ◽  
Subodh Kumar
Keyword(s):  
Local Population ◽  
Inferior Alveolar Nerve ◽  
P Value ◽  
Anatomical Landmarks ◽  
Mandibular Ramus ◽  
Cross Sectional ◽  
Mean Values ◽  
Mandibular Foramen ◽  
Adult Human ◽  
The Mean

Background: The morphological knowledge of the mandibular foramen is very important during dental procedures involving lower jaw, as structures that pass through this foramen are at risk. Inferior alveolar nerve (IAN) block is the most frequently used nerve block technique in dental practice. Location of mandibular foramen is clinically important in Inferior alveolar nerve (IAN) block, dentoalveolar surgery planning, and various endodontic treatments. Present study aimed to locate the precise location of mandibular foramen in relation to the borders of the mandibular ramus, its distances from different bone landmarks on internal surface of ramus of dry mandible and incidence of occurrence of accessory mandibular foramen in local population. Material And Methods: Present study was a cross-sectional study of 50 (fty) dry adult human mandibles, obtained from the dissection room of the department of Anatomy, NMCH, Patna, Bihar. Location of MF(Mandibular foramen) from various parameters was determined with digital Vernier calipers. The presence of accessory mandibular foramen in and around mandibular foramen on the medial surface of mandibular ramus was by simple visual observation with the help of a magnifying lens and their prevalence rate was noted. All the above parameters were carefully documented and statistically analysed. Statistical analysis was done using SPSS version 23. Student's t test was used as test of signicance to compare the mean values of right and left sides and a P-value less than 0.05 was taken to be statistically signicant. Results: Total 50 dry adult human mandibles were studied. The mean distance of mandibular foramina to anterior border of ramus was 16.97 ± 2.13 (R) mm and 17.04 ± 2.72mm(L), to posterior border was (R): 13.73 ± 2.28 mm and (L): 14.16 ± 2. 05 mm, to mandibular notch was (R): 20.50 ± 2.11 mm and (L): 20.10 ± 2.82 mm and to inferior border was (R): 26.93 ± 3.09 mm and (L): 26.37 ± 4.25 mm. We noted that there was no signicant difference in the values on the right and left sides (p>0.05). All mandibles (100%) have bilateral mandibular foramen. Unilaterally Single Accessory mandibular foramen was present in 11 (22%) mandibles. Unilaterally double accessory mandibular foramen was present in 06 (12%). Bilateral double accessory mandibular foramen was noted in 02(04%) mandibles only. Bilateral single accessory mandibular foramen was noted in 04(08%) mandibles. Conclusion: Present study provides valuable information regarding distances between mandibular foramen and surgically encountered anatomical landmarks, which is very useful to dental surgeons.

scholarly journals Ocular Echobiometry and Resistivity Index of External Ophthalmic Artery in Agoutis (Dasyprocta prymnolopha)

2021 ◽  
Vol 49 ◽  
Author(s):  
Sabrina Barros Araújo ◽  
Flávio Ribeiro Alves ◽  
Gerson Tavares Pessoa ◽  
Renan Paraguassu De Sá Rodrigues ◽  
Laecio Da Silva Moura ◽  
...  
Keyword(s):  
Anterior Chamber ◽  
Ophthalmic Artery ◽  
Color Doppler ◽  
Two Dimensional ◽  
Wild Rodents ◽  
Resistivity Index ◽  
Lens Thickness ◽  
Ocular Ultrasound ◽  
The Mean ◽  
The Right

Background: Veterinary Ophthalmology provides complementary information for the diagnosis of ocular pathologies. Studies in wild species are essential. Among the diagnostic techniques in ophthalmology, two-dimensional ultrasonography stands out. The agouti is a rodent belonging to the Dasyproctidae family that has been widely used as an experimental model. For these animals, sight is one of the crucial senses for their survival. The aim of this study was to evaluate the effectiveness of the two-dimensional ocular ultrasound technique to obtain anatomical measurements and the external ophthalmic artery resistivity index, presumably normal in the species Dasyprocta prymnolopha.Materials, Methods & Results: Forty eye bulbs of 20 adult rodents of the species were evaluated by ultrasonography. In these animals, B-mode echobiometry was performed using the transpalpebral approach and the hemodynamic study of the external ophthalmic artery using the color Doppler technique. All examinations were initiated by the left eye bulb and all measurements were performed by only one examiner. The collected data related to echobiometry were analyzed using Bioest 5.0 for Windows. Initially, normality was tested using the Shapiro-Wilk test for each parameter, then the paired t-test was performed, comparing right and left eyes, and a significance level of 5% (P < 0.05) was adopted. Based on the methodology used, the following values were obtained for the right and left eyeballs, respectively: anterior chamber thickness - mean of 1.28 ± 0.3 mm and 1.22 ± 0.1 mm; lens thickness - 8.27 ± 0.9 mm and 8.11 ± 0.9 mm; vitreous chamber thickness - 5.35 ± 0.48 mm and 5.30 ± 0.47 mm and axial length - 12.7 ± 0.9 mm and 13 ± 0.68 mm. The mean external ophthalmic artery resistivity values were 0.4305 ± 0.0390 and 0.4258 ± 0.0387 (right and left eye, respectively), characterizing a low resistance. There was no statistical difference between the right and left eyeballs in any of the studied parameters.Discussion: The use of the convex transducer was feasible, promoting adequate contact with the ocular surface and images of satisfactory quality for obtaining measurements, similar to what was observed in studies evaluating the ocular biometry of primates and dogs. The anterior chamber thickness values in this experiment did not differ statistically between the antimers, as well as observed for dogs. The data obtained for lens thickness did not differ statistically for antimers, like those obtained for other rodent species evaluated with the same methodology. The mean values of vitreous chamber thickness were like those observed in chinchillas but correspond to about half of that obtained for capybaras. In this study, the external ophthalmic artery was characterized in all animals, but obtaining the spectral tracing was difficult due to its fine caliber. In wild animals, and especially in wild rodents, there are few data reporting the resistivity of the ophthalmic artery, and there is a lack of studies, which can be explained by the behavioral characteristics of defense and by the high susceptibility to stress in capture, since the performing the technique requires, as in other procedures, the use of chemical containment.Keywords: Doppler flow, ultrasound, eye, agouti.

Intravascular Ultrasound: Potential Tool to Assess Coronary Anastomosis Quality

2003 ◽  
Vol 11 (2) ◽  
pp. 143-146
Author(s):  
Piergiorgio Tozzi ◽  
Antonio F Corno ◽  
Ludwig K von Segesser
Keyword(s):  
Coronary Artery ◽  
Intravascular Ultrasound ◽  
Left Internal Mammary Artery ◽  
Artery Bypass ◽  
Ultrasound Images ◽  
Cross Sectional ◽  
Flow Measurements ◽  
Off Pump ◽  
The Mean ◽  
Macroscopic Examination

Coronary angiography and Doppler flow measurements are most commonly used to assess the patency of anastomoses in the operating theater. Intravascular ultrasound might be another means of monitoring the surgical procedure during coronary artery bypass. Five sheep underwent off-pump bypass of the left anterior descending coronary artery using the left internal mammary artery. The running suture was evaluated by intraoperative fluoroscopy and a coronary intravascular ultrasound probe inserted into the target artery proximal to the anastomosis. Macroscopic examination of the anastomosis was performed to validate the angiographic and intravascular ultrasound images. The diameter, cross-sectional area, and compliance of each anastomosis were calculated in systole and diastole. All anastomoses were patent without signs of stenosis. In one case, intravascular ultrasound showed an intimal flap, which was confirmed by macroscopic examination. The mean major anastomotic diameter was 4.5 ± 0.5 mm on angiography and 4.0 ± 0.5 mm on intravascular ultrasound. From the ultrasound data, the mean cross-sectional anastomotic area was calculated as 6.21 ± 0.1 mm2 in systole and 5.49 ± 0.1 mm2 in diastole, and these data were used to calculate the cross-sectional anastomosis compliance. Coronary intravascular ultrasound can visualize intima-to-intima apposition and provide reliable calculations of anastomosis compliance.

scholarly journals Evaluation of optic canal anatomy and symmetry using CT

2019 ◽  
Vol 4 (1) ◽  
pp. e000302 ◽  
Author(s):  
Xinxin Zhang ◽  
Yueh Lee ◽  
Daniel Olson ◽  
David Fleischman
Keyword(s):  
North Carolina ◽  
Retrospective Chart Review ◽  
Bilateral Symmetry ◽  
Optic Canal ◽  
Difference Threshold ◽  
Racial Groups ◽  
Cross Sectional ◽  
Minimum Diameter ◽  
The Mean ◽  
The Right

ObjectiveWe aim to describe the anatomy and symmetry patterns of the optic canal in patients having undergone maxillofacial CT imaging.MethodsIn this retrospective chart review, we included all patients who received sinus and maxillofacial CT at the University of North Carolina hospitals between 2008 and 2016, without facial or cranial fractures or other medical conditions that would affect optic canal size. We measured the length of ≥75% enclosed canal, minimum cross-sectional area and minimum diameter bilaterally using iNtuition TeraRecon (Durham, North Carolina) and compared bilateral symmetry using a 20 % difference threshold. Each parameter above was compared among white, black, non-white and non-black patients.ResultsOf 335 patients, the mean canal length was 5.61±2.22 mm. The mean minimum area was 11.84±3.11 mm2. The mean minimum diameter was 3.28±0.55 mm. A total of 39.4% (132/335) of patients had asymmetric canal lengths, 18.8% (63/335) had asymmetric minimum areas, and 12.5% (42/335) had asymmetric minimum diameters. No differences were found between racial groups. The right optic canal was larger than the left (right: 12.12 mm vs left: 11.55 mm, p<0.0001).ConclusionOptic canal asymmetry is not uncommon. It may affect risk of papilloedema severity, explain cases of unilateral or asymmetric papilloedema and possibly asymmetric glaucoma.

scholarly journals Histomorphometric Study of the Glomeruli of the Kidney in Bangladeshi Population

2015 ◽  
Vol 9 (1) ◽  
pp. 11-16
Author(s):  
Fatema Johora ◽  
Abu Sadat Mohammad Nurunnabi ◽  
Sunjida Shahriah ◽  
Rukshana Ahmed ◽  
Shamim Ara
Keyword(s):  
Left Kidney ◽  
Age Groups ◽  
Population Based ◽  
Cross Sectional ◽  
Medical College ◽  
Histomorphometric Study ◽  
The Mean ◽  
Group 10 ◽  
Bangladeshi Population ◽  
The Right

Background: Controversies still prevail on glomerular changes of kidney whether due to normal aging or its association with diseases Objective: The aim of the present study was to see the variation in number and size of the glomeruli of kidney with increasing age in a Bangladeshi population based on autopsy. Methods: This cross-sectional, descriptive study was done in the Department of Anatomy, Dhaka Medical College, Dhaka, from July 2008 to June 2009, based on collection of 140 post mortem human kidneys collected from 70 unclaimed dead bodies from the morgue. All the samples were divided into three age-groups: 10-19 years, 20-39 years and 40-59 years. Histological slides were prepared by using routine Harris’ Haematoxylin and Eosin (H & E) stain. The number of glomeruli was measured by point counting technique, while the size (diameter) was measured by using ocular and stage micrometer. Results: The mean ± SE number of glomeruli per sq. mm found in the right and left kidney were 8.45±0.52 and 8.67±0.80 in group 10-19 years, 9.90±0.42 and 9.92±0.47 in 20-39 years, and 8.52±0.18 and 8.55±0.16 in 40-59 years respectively. Besides, the size (mean ± SE diameter) of glomeruli was found in the right and left kidney were 43.96±3.01ìm and 143.92±2.90ìm in group 10-19 years, 153.69±5.18ìm and 153.61±5.24ìm in 20-39 years, and 140.48±0.95ìm and 140.78±0.88ìm in 40-59 years respectively. Conclusion: No difference was found in number and size of glomeruli between right and left kidney in any group. Similarly, no difference was also evident among different age groups. DOI: http://dx.doi.org/10.3329/jbsp.v9i1.22788 Bangladesh Soc Physiol. 2014, June; 9(1): 11-16

Strength of Braided Polyblend Polyethylene Sutures versus Braided Polyester Sutures in Achilles Tendon Repair

2010 ◽  
Vol 100 (3) ◽  
pp. 185-188 ◽  
Author(s):  
Keith D. Cook ◽  
Greg Clark ◽  
Eric Lui ◽  
Gaurav Vajaria ◽  
George F. Wallace
Keyword(s):  
Achilles Tendon ◽  
Suture Material ◽  
Tendon Repair ◽  
Contralateral Side ◽  
Suture Technique ◽  
Materials Testing ◽  
Suture Materials ◽  
Cross Sectional ◽  
The Mean ◽  
The Right

Background: Various techniques may be used to repair Achilles tendon ruptures; however, we contend that using the strongest suture with the least amount of suture material is ideal. Methods: To compare the strength of 2-0 FiberLoop (Arthrex Inc, Naples, Florida) and #2 Ethibond (Ethicon Inc, Somerville, New Jersey) suture materials in Achilles tendon repairs, 12 Achilles tendons were harvested from cadavers aged 18 to 62 years (median age, 42 years). The tendons were transected and repaired using a modified Krackow suture technique. All of the right limbs were repaired with 2-0 FiberLoop, and the contralateral side was repaired with #2 Ethibond. The specimens were mounted to a materials testing system, and the repairs were pulled to failure in an anatomical direction. Results: The mean ± SD yield loads of 2-0 FiberLoop and #2 Ethibond were 233 ± 48 N and 134 ± 34 N, respectively (P = .002). The mean ± SD ultimate load of 2-0 FiberLoop was 282 ± 58 N, and that of #2 Ethibond was 135 ± 33 N (P &lt; .001). The cross-sectional area of one pass of 2-0 FiberLoop was calculated to be 0.21 mm2, and one pass of #2 Ethibond was 0.28 mm2. Conclusions: The smaller-caliber 2-0 FiberLoop was significantly stronger than #2 Ethibond. This study suggests that there is no advantage to using the traditional larger suture material for Achilles tendon repairs; however, further clinical testing is needed to determine the optimal repair technique. (J Am Podiatr Med Assoc 100(3): 185–188, 2010)

Mechanical properties and dimensions of the major pulmonary arteries

1960 ◽  
Vol 15 (1) ◽  
pp. 92-96 ◽  
Author(s):  
Dali J. Patel ◽  
Donald P. Schilder ◽  
Alexander J. Mallos
Keyword(s):  
Pulmonary Artery ◽  
Pulse Pressure ◽  
Technical Assistance ◽  
Main Pulmonary Artery ◽  
Pulmonary Arteries ◽  
Cross Sectional ◽  
Measurement Control ◽  
The Mean ◽  
The Right ◽  
The Relationship

The relationship between instantaneous distending pressure and diameter of the pulmonary artery was studied in 18 living thoracotomized dogs. An electrical caliper with adequate recording characteristics was developed for instantaneous diameter measurement. Control observations were made over a range of pressures induced by rapid, right heart dextran-infusion and were compared with those obtained during norepinephrine administration. Results indicate: a) the pulse contours of the pulmonary artery pressure and diameter are essentially identical, indicating negligible inertance and viscous resistance of the vessel wall, b) the mean change in average radius during a cardiac cycle was ±7.8% ± 2.86 S.D. ± .32 S.E.M. (0.48%/cm H2O pulse pressure) under control conditions, c) the ratio of change in radius to pulse pressure, R/P, showed a significant decrease during norepinephrine administration when compared to control values within the same pressure range (P < .01) and d) the cross-sectional area of the main pulmonary artery exceeded that of the right and left combined. Note: (With the Technical Assistance of Alfred G. T. Casper) Submitted on August 25, 1959

scholarly journals Position of parotid papilla and commissure of lip in relation to maxillary occlusal plane among patients visiting a tertiary care centre of Nepal

2021 ◽  
Vol 4 (1) ◽  
pp. 1-6
Author(s):  
P Mehta ◽  
S Chhetri
Keyword(s):  
Tertiary Care ◽  
Cross Sectional Study ◽  
Occlusal Plane ◽  
Sectional Study ◽  
Tertiary Care Centre ◽  
Cross Sectional ◽  
Medical College ◽  
Exact Position ◽  
The Mean ◽  
Edentulous Patients

Introduction: The exact position of the Parotid papilla and commissure of the lip plays a crucial role in determining the maxillary occlusal plane which directly facilitates rehabilitating edentulous patients with a removable complete denture. Since the beginning, many authors have conducted different studies regarding its position but multiple variations in its location have been noted. Also, this type of study has not been conducted in the Nepalese population which drags the urge to determine the position of these soft-tissue landmarks in context to the Nepalese population. Objective: To determine the position of parotid papilla and commissure of lip in relation to the maxillary occlusal plane. Materials and Methods: A descriptive cross-sectional study was conducted in the 45 dentate subjects visiting Nobel medical college from November 2019 to April 2020. A vestibular impression was made, stone index fabricated and vernier caliper was used to locate position of parotid papilla & commissure of lip. All the data were collected and statistically analyzed. Results: The mean measurement of distances between maxillary occlusal plane and parotid papilla was 3.69 ± 1.19 mm and between maxillary occlusal plane and commissure of lip was 0.41 ± 0.83 mm respectively. Conclusion: This study showed that the position of the parotid papilla was superior to the position of the maxillary occlusal plane with a mean distance of 3.69mm. The commissure of lip was found to be at the level of maxillary occlusion plane in highest number of cases followed by a superior position with least at the inferior position with respect to the maxillary occlusal plane.

scholarly journals Position of the Mandibular Foramen in Different Facial Shapes Assessed by Cone-Beam Computed Tomography - A Cross-Sectional Retrospective Study

2019 ◽  
Vol 13 (1) ◽  
pp. 544-550
Author(s):  
Silvan Correa ◽  
Rogério H. Lopes Motta ◽  
Milena B. Fellipe Silva ◽  
Sidney R. Figueroba ◽  
Francisco C. Groppo ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Retrospective Study ◽  
Cone Beam Computed Tomography ◽  
Inferior Alveolar Nerve ◽  
The Other ◽  
Cone Beam ◽  
Inferior Alveolar Nerve Block ◽  
Mandibular Ramus ◽  
Cross Sectional ◽  
Mandibular Foramen

Purpose: The mandibular foramen, located on the internal surface of the mandibular ramus, is an important anatomical landmark for the success during the inferior alveolar nerve block. This cross-sectional retrospective study aimed to evaluate the location of the mandibular foramen through Cone-Beam Computed Tomography (CBCT) in different facial shapes. Materials and Methods: The determination of the location of the mandibular foramen was performed using CBCT of mesocephalic, dolichocephalic and brachycephalic patients (n=40 each). The ramus width (W), the distance from the mandibular foramen to the deepest point of the anterior border of the mandibular ramus (D), the distance from the mandibular foramen to the lowest point of the mandibular notch (V) and the distance from the inferior border of the mandible to the lowest point in of the mandibular border (R), as well as the ratios W/D and V/R, were measured. ANCOVA, two-way ANOVA and Chi-square tests were used to analyze the variation among the facial shapes. Results: The ramus width (W) was greater (p<0.0001) in the brachycephalic (28.4±0.5 mm) than in both mesocephalic (26.8±0.36 mm) and dolichocephalic (25.5±0.39 mm) patients. D (p=0.0433) and R (p=0.0072) were also greater in the brachycephalic (17.7±0.36 mm; 43.4±0.75 mm, respectively) than dolichocephalic (16.5±0.3 mm; 40.3±0.63 mm, respectively), but both did not differ from mesocephalic (17.3±0.36 mm; 41.8±0.66 mm, respectively) patients. The other measurements (V, W/D and R/V) did not significantly differ among facial shapes. Conclusion: The localization of the mandibular foramen was, in the horizontal direction, more posterior in the brachycephalic patients and, in the vertical direction, higher in the dolichocephalic patients, when compared to the other groups analyzed. Thus, the anatomic data found in this study may help dentists to increase the success of the inferior alveolar nerve block and prevent surgical complications.

scholarly journals Korelasi antara lebar mesiodistal gigi dengan kecembungan profil jaringan lunak wajah orang Bugis-Makassar

2007 ◽  
Vol 6 (2) ◽  
pp. 72
Author(s):  
Susilowati Susilowati ◽  
Sulastry Sulastry
Keyword(s):  
Soft Tissue ◽  
Sample Selection ◽  
Cross Sectional Study ◽  
Weak Correlation ◽  
Cross Sectional ◽  
Facial Profile ◽  
Tooth Width ◽  
Soft Tissue Profile ◽  
The Mean ◽  
The Right

Malocclusion is very closely related to the disharmony of mesiodistaltooth-width with dental arches. It is important to know the mesiodistaltooth widths before establishing the diagnosis and planning oforthodontic treatment. The ultimate goal of orthodontic treatment isfacialesthetic, which is supported by a balanced soft tissue profile. The aim ofthis cross sectional study was to investigate the correlation betweenmesiodistal tooth widths with the convexity of soft tissue profile. Theresult of the study can be used as a reference and guidance inestablishing orthodontic diagnosis and treatment planning. The numberof sample was 50 (18 males and 32 females), aged 18-27 years old.Criteria for sample selection comprised absence of interproximalcaries/filling, no tooth deformity, aged over 17 years, never undergoorthodontic treatment, the presence of teeth from the right first molarthrough the left first molar, both upper and lower, Buginese orMakassarese people, and Class I Angle malocclusion. Tooth sizemeasurements were performed on study models by using slidingcaliper. The photo of each subject was taken cephalometrically. Theangular measurement was performed on cephalogram, using Subtelny'sanalysis. The soft tissue convexity degree was represented by N-SnPog.The data was processed using SPSS program and tested byindependent t-test and correlation. It can be concluded that the meanvalue of mesiodistal width on males was greater that those on females(p<0.05), the mean of facial convexity degree on males (159.05°) wassmaller than those on females (162.77°), which was different significantly (p<0.05), and there was a very weak correlation (r<0.25) oralmost no correlation between mesiodistal tooth-width and the degree ofsoft tissue facial profile, and it was not significant statistically (p>0.05).

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