scholarly journals MORPHOMETRY OF THE PEDICLE OF FIRST SACRAL VERTEBRAE AND ITS APPLICATION IN POSTERIOR TRANSPEDICULAR SCREW FIXATION. Morfometría del pedículo de la primera vértebra sacra y su aplicación en la fijación posterior con tornillo transpedicular

2016 ◽  
Vol 6 (3) ◽  
pp. 156-161
Author(s):  
Mangala M Pai ◽  
Bukkambudhi V Murlimanju ◽  
Latha V Prabhu ◽  
Rajanigandha Vadgaonkar ◽  
P P. Jagadish Rao ◽  
...  
Keyword(s):  
Indian Population ◽  
Screw Fixation ◽  
Spinous Process ◽  
South Indian Population ◽  
Male And Female ◽  
South Indian ◽  
Transpedicular Screw ◽  
Pedicle Length ◽  
The Mean ◽  
Transpedicular Screw Fixation

Los objetivos del presente estudio fueron determinar los parámetros anatómicos del pedículo S1 en la población India del sur para comparar los datos con respecto a los géneros masculinos y femeninos. El estudio incluyó 50 sacros secos (25 hombres y 25 mujeres) que se obtuvieron en el laboratorio de anatomía de nuestra institución. En el presente estudio se observa que la longitud media del pedículo S1 fue 49.9± 3,6 mm para los hombres y 46.3± 4,8 mm para las mujeres. La altura céfalo-caudal del pedículo S1 fue 27.2±4.0 mm y 23.9±3.7 mm para el varón y la hembra respectivamente. La anchura antero-posterior del pedículo S1 fue 7.5± 1,3 mm, 7.5± 1.7 mm en varones y mujeres, respectivamente. La distancia antero-posterior de S1, desde el promontorio sacro a la apófisis espinosa de S1 fue 52.9± 5.2 mm y 50.4± 6.8 mm en los géneros masculino y femenino respectivamente. El presente estudio demostró que la longitud y la altura de céfalo-caudal eran más altos (p0.05) en varones que en mujeres. Los datos de mujeres y varones con respecto a la anchura antero-posterior y la distancia antero-posterior de S1 no eran estadísticamente diferentes. El presente estudio ha proporcionado datos morfométricos importantes del pedículo de la primera vértebra sacra de la muestra anatómica de la población India del sur. El conocimiento de los diámetros del pedículo de S1 es crucial para la colocación segura de tornillos para la fijación transpedicular posterior. Objectives of the present study were to determine the anatomical parameters of the S1 pedicle in South Indian population and to compare the data, with respect to male and female genders. The stud­­y included 50 dry sacra (25 male and 25 female), which were obtained from the anatomy laboratory of our institution. It is observed in the present study that the mean S1 pedicle length was 49.9± 3.6 mm for male and 46.3± 4.8 mm for the female. The cephalocaudal heights of S1 pedicle were 27.2±4.0 mms and 23.9±3.7 mms for the male and female respectively. The anteroposterior width of S1 pedicle was 7.5± 1.3 mms, 7.5± 1.7 mms in males and females respectively. The anteroposterior distances of S1, from the sacral promontory to the spinous process of S1 were 52.9± 5.2 mms and 50.4± 6.8 mms respectively for the male and female genders. The present study observed that the mean S1 pedicle length and the cephalocaudal height were higher (p<0.05) for the males than that of females. The data (male vs female) were not found statistically different (p>0.05), with respect to the anteroposterior width of the S1 pedicle and the anteroposterior distances of S1 from the sacral promontory to the spinous process of S1. The present study has provided important morphometric data onto the pedicle of the first sacral vertebrae, from the anatomical samples of the South Indian population. The knowledge of pedicle diameters of S1 is crucial to the safe placement of screws in the posterior transpedicular screw fixation.

Surgical Anatomic Evaluation of the Cervical Pedicle and Adjacent Neural Structures

Neurosurgery ◽  
2000 ◽  
Vol 47 (5) ◽  
pp. 1162-1169 ◽  
Author(s):  
Hasan Çağlar Uğur ◽  
Ayhan Attar ◽  
Aysun Uz ◽  
İbrahim Tekdemir ◽  
Nihat Egemen ◽  
...  
Keyword(s):  
Nerve Root ◽  
Screw Fixation ◽  
Root Diameter ◽  
Cervical Region ◽  
Dural Sac ◽  
Transpedicular Screw ◽  
Cervical Pedicle ◽  
The Mean ◽  
Transpedicular Screw Fixation ◽  
Pedicle Width

Abstract OBJECTIVE Although several clinical applications of transpedicular screw fixation in the cervical spine have been documented recently, few anatomic studies concerning the cervical pedicle are available. This study was designed to evaluate the anatomy and adjacent neural relationships of the middle and lower cervical pedicle (C3–C7). The main objective is to provide accurate information for transpedicular screw fixation in the cervical region and to minimize complications by providing a three-dimensional orientation. METHODS Twenty cadavers were used to observe the cervical pedicle and its relationships. After removal of the posterior bony elements, including spinous processes, laminae, lateral masses, and inferior and superior facets, the isthmus of the pedicle was exposed. Pedicle width, pedicle height, interpedicular distance, pedicle-inferior nerve root distance, pedicle-superior nerve root distance, pedicle-dural sac distance, medial pedicle-dural sac distance, mean angle of the pedicle, root exit angle, and nerve root diameter were measured. RESULTS The results indicate that there was no distance between the pedicle and the superior nerve root and between the pedicle and the dural sac in 16 specimens, whereas there was a slight distance in the lower cervical region in the 4 other specimens. The mean distance between the pedicle and the inferior nerve root for all specimens ranged from 1.0 to 2.5 mm. The mean distance between the medial pedicle and the dural sac increased consistently from 2.4 to 3.1 mm. At C3–C7, the mean pedicle height ranged from 5.2 to 8.5 mm, and the mean pedicle width ranged from 3.7 to 6.5 mm. Interpedicular distance ranged from 21.2 to 23.2 mm. The mean root exit angle ranged from 69 to 104 degrees, with the largest angle at C3 and the smallest at C6. The mean angle of the pedicle ranged from 38 to 48 degrees. The nerve root diameter increased consistently from 2.7 mm at C3 to 3.8 mm at C6 and then decreased to 3.7 mm at the C7 level. Differences in measurements were considered statistically significant at levels ranging from P &lt; 0.05 to P &lt; 0.01. CONCLUSION This study indicates that improper placement of the pedicle screw medially and superiorly in the middle and lower cervical spine should be avoided and that the anatomic variations between individuals should be established by measurement.

scholarly journals The Morphometric study of Internal acoustic meatus in dry skulls of South Indian adults

2017 ◽  
Vol 06 (01) ◽  
pp. 051-058
Author(s):  
Vinay KV ◽  
◽  
◽  
Keyword(s):  
Indian Population ◽  
Morphometric Study ◽  
South Indian Population ◽  
Internal Acoustic Meatus ◽  
South Indian ◽  
Bony Canal ◽  
The Mean ◽  
Skull Trauma ◽  
The Individual ◽  
Temporal Bones

Abstract Background: The internal acoustic meatus (IAM) is a bony canal present between labyrinth and posterior cranial fossa. The normal morphometry of IAM is useful during evaluation of cases of skull trauma, congenital anomalies of IAM affecting the individual nerves, and in pre evaluation of surgeries of ear. The present study was done to determine the normal dimensions of IAM and to have a morphological database of the IAM for South Indian population. Materials & methods: The present study was conducted on 37 temporal bones of adult skulls. The impression of IAM was taken by injecting polyvinyl siloxane (PVS) impression material into the IAM and the dimensions were measured by using digital vernier callipers on right and left side separately. The height and width of IAM at porous, middle and fundus were measured and tabulated. Results: As there was no significant statistical difference between the parameters of right and left sides the data were pooled together. The mean height & width of IAM at porous end was 4.5mm & 6.42mm respectively. The mean height & width of IAC at its middle portion was 4.04mm & 4.91mm respectively. The mean height & width of IAM at the fundus was 3.8mm and 4.60mm respectively. The superior length & inferior length was 8.60 & 8.70mm respectively. Conclusion:This study provides a ready reference for dimensions of IAM of adult dry skull in South Indian population. The present study confirms that there is difference in the dimensions of IAM among different races and regions and thus emphasizes the need to have normal data for our population.

scholarly journals Measurement of Insall Salvati ratio and modified Insall Salvati ratio to assess the position of the patella in South Indian population

2016 ◽  
Vol 3 (1) ◽  
pp. 23 ◽  
Author(s):  
Arun Kumar C. ◽  
Ganesan G. Ram
Keyword(s):  
Observational Study ◽  
Knee Joint ◽  
Indian Population ◽  
South Indian Population ◽  
Age Group ◽  
Radiological Assessment ◽  
Patella Baja ◽  
South Indian ◽  
Female Predominance ◽  
The Mean

<p class="abstract"><strong>Background: </strong><span lang="EN-IN">This is an observational study that was carried out to find the mean Insall Salvati ratio and modified Insall Salvati ratio in people coming to outpatient department requiring radiograph of knee joint..</span></p><p class="abstract"><strong>Methods: </strong>Radiological assessment of 200 knees which included 100 men and 100 women above the age group of 18,in a period of 6 months for which Insall Salvati and modified Insall Salvati ratio were calculated.<strong></strong></p><p class="abstract"><strong>Results:</strong> <span lang="EN-IN">The mean Insall Salvati ratio was calculated to be 0.805 and the mean modified Insall Salvati ratio was 0.605 in South Indian.</span></p><p class="abstract"><strong>Conclusions: </strong>Based on the above study i conclude that majority of South Indian population had patella baja with female predominance<span lang="EN-IN">.</span></p>

scholarly journals Morphology and morphometry of infra orbital foramen in South Indian adult dry skulls

2014 ◽  
Vol 03 (03) ◽  
pp. 122-127
Author(s):  
Vishal K. ◽  
Vinay K V. ◽  
Johncy I P.
Keyword(s):  
Regional Variation ◽  
Indian Population ◽  
Transverse Diameter ◽  
South Indian Population ◽  
Morphometric Data ◽  
Orbital Margin ◽  
South Indian ◽  
Horizontal Diameter ◽  
The Mean ◽  
Morphology And Morphometry

Abstract Background: The infra orbital foramen (IOF) situated below infra-orbital margin (IOM) transmits infra­orbital nerve and infra- orbital vessels. The knowledge of the dimension, shape and direction of the IOF has important implications in various surgical and anaesthetic procedures. This will avoid iatrogenic injury to neurovascular bundle emerging from the IOF. Material and methods: Sixty adult dry skulls of unknown sex from the Department of Anatomy and Department of Forensic Medicine were used. IOF on both sides of skulls were assessed for the shape and direction by inspection. The vertical and horizontal diameter of the IOF was measured using a digital Vernier caliper to the nearest millimeters and the results were statistically analyzed. Results: The shape of the IOF was vertically oval in majority of the skulls (37.5%) and was semi lunar shaped in 10.83% of the skull. The IOF was directed infero­medially in about 52.5% of the cases and was directed medially in 6.67% of the cases. The mean transverse diameter was 2.96mm and the mean vertical diameter was 3.7mm. All the above results were compared with studies of previous workers. Conclusion: The present study confirms that there is racial as well as regional variation in the shape and dimensions of IOF, thus emphasizing the need to have morphometric data for South Indian population.

scholarly journals Nummular headache: Clinico-epidemiological features in South Indian population

2016 ◽  
Vol 7 (04) ◽  
pp. 532-536 ◽  
Author(s):  
K. Rammohan ◽  
Shyma M. Mundayadan ◽  
Robert Mathew
Keyword(s):  
South India ◽  
Indian Population ◽  
Tertiary Care ◽  
South Indian Population ◽  
International Literature ◽  
Nummular Headache ◽  
Head Pain ◽  
Epidemiological Features ◽  
South Indian ◽  
The Mean

ABSTRACT Context: Nummular headache (NH) is a primary disorder characterized by head pain exclusively felt in a small-rounded area typically 2–6 cm in diameter. Aims: The aim of this review is to study the clinical and epidemiological features of NH in a patient population of South India and to compare this with that of described in the international literature. Settings and Design: A prospective, observational study conducted in a tertiary care center. Materials and Methods: Patients attending the medicine and neurology outpatient departments of a tertiary referral hospital in South India diagnosed to have NH as per the International Classification of Headache Disorders 3 beta (2013) criteria were studied over 30 months. All of the patients had a normal neurological examination. Neuroimaging findings were normal, except in one patient. Results: A total of 19 females and 10 males were studied. The mean age of onset was 47.62 years (range 36–60). The duration of headache varied from a minimum of 3 months to a maximum of 5 years, with a mean of 24.17 months. The site of headache was predominantly in the parietal area 15 (51.72%), followed by the occipital area 7 (24.13%). The mean diameter of the affected area was 3.23 cm. The intensity of the headache proved to be mild to moderate with a mean visual analog scale score of 5.03. The quality of pain was mainly felt as burning dysesthesia 12 (41.38%). In the majority of patients, i.e. 21 (72.41%), pain was chronic and continuous. None of the patients had any significant trophic change even though paresthesias, dysesthesias, and allodynia were reported by a significant minority of patients, i.e. 9 (31.03%). Only one (3.45%) patient gave a history of head injury. Ten (34.48%) out of 29 patients had other types of concurrent headaches; the majority of which proved to be migrainous, i.e. 7 (24.14%), 2 patients (6.89%) with tension headache, and 1 patient (3.45%) with trigeminal neuralgia. Conclusion: Our study proves the existence of the newly described primary headache syndrome called NH in South Indian population. In comparing our results with the international literature, the number of similarities is much greater than the differences. The etiology of pain in our series appeared to be primarily peripheral with a role for central pain sensitization in some cases due to a variety of concurrent central causes of head pain.

scholarly journals A Comprehensive Study on Supratrochlear Foramen of Human Humerus and its Clinical Significance - A Review.

2021 ◽  
Vol 14 (3) ◽  
pp. 1197-1207
Author(s):  
Lalita BT ◽  
Yuvaraj Maria Francis ◽  
Balaji K ◽  
Gunapriya Raghunath ◽  
Kumaresan M
Keyword(s):  
Cystic Lesion ◽  
Indian Population ◽  
South Indian Population ◽  
Lateral Epicondyle ◽  
Inferior Margin ◽  
Orthopedic Surgeons ◽  
South Indian ◽  
The Mean ◽  
The Right ◽  
Comprehensive Study

The lower end of humerus has numerous fossae which play a significant role during extreme movements. Coronoid fossa and olecranon fossa are separated by a delicate supratrochlear septum; occasionally septum has perforation and form an aperture, named as Supratrochlear foramen (STF). The knowledge of this foramen will be beneficial for anatomists, anthropologists, orthopedic surgeons, and radiologists. The aim of the present study was to establish the prevalence and morphometry of STF of the humerus in South Indian population and to correlate with the previous studies. The present prospective study was carried out with 274 (146 left sided + 127 right sided) dried humeri of unknown sex and age. The distal humeri were examined for the presence of STF, morphometry such as diverse shapes, vertical and horizontal diameters, and distance from STF to medial, lateral epicondyle and also to the inferior margin of trochlea using digital vernier caliper. In the present study, out of 274 dried humeri, 69 showed presence of STF, 163 were translucent and 42 were opaque. The prevalence of STF was 25.18%. After keen observation, shapes of the STF were categorized accordingly. The oval (42%) showed higher percentage whereas the other shapes showed as follows: - irregular (12%), round (19%), rectangular (12%), reniform (9.7%), sieve (7.3%) and triangular (2%). The mean vertical and transverse diameters of STF on the right side were 3.12 ± 1.09 and 5.5 ± 1.83mm and on the left side, it was 3.47± 1.32 and 4.9± 1.5mm respectively. The mean distance from STF to medial and lateral epicondyle on the right side was 25.12± 3.1 and 28.09± 2.3mm and for the left side 24.97± 2.9mm and 27.16± 2.4mm respectively. The anatomical knowledge regarding the supratrochlear foramen is much promising for the orthopaedic surgeons during intramedullary nailing for supracondylar fracture of humerus. STF appears as a radiolucent area in radiographs, which may pose a difficulty for the radiologist in differentiating it from an osteolytic or cystic lesion. In addition, STF is predominantly found in the primates, it may act an evolutionary link between the humans and lower animals.

scholarly journals Prevalence of midline diastema and its correlation with high Frenal attachment

2020 ◽  
Vol 11 (SPL3) ◽  
pp. 847-851
Author(s):  
Shivanni S S ◽  
Sumathi Felicita A ◽  
Balakrishna R N
Keyword(s):  
Periodontal Disease ◽  
Indian Population ◽  
South Indian Population ◽  
Digital Archives ◽  
The South ◽  
Chi Square ◽  
South Indian ◽  
Common Etiology ◽  
The Mean ◽  
Chi Square Tests

The aim of this study is to assess the prevalence of midline diastema in the South Indian population and to find its correlation with high frenal attachment. The study includes patients visiting the department of orthodontics. The data was collected from the digital archives of the institution. Intraoral photos were assessed. A total 305 patients who reported to the department of orthodontics from June 2019 to March 2020 were screened. The causes of diastema namely presence of high frenal attachment, generalised spacing and periodontal disease, were evaluated. The results were statistically analysed using chi-square tests and graphs were tabulated. A total of 305 patients were screened, among which midline diastema was present in 22.3% (68) of the cases. High frenal attachment was found in 52%, generalised spacing in 36% and periodontal disease in 12% of the cases. The mean age of the patient was 23±5.25 years. The incidence of midline diastema was found to be 22%. High frenal attachment was found to be the most common etiology.

scholarly journals Use of the Airo mobile intraoperative CT system versus the O-arm for transpedicular screw fixation in the thoracic and lumbar spine: a retrospective cohort study of 263 patients

2018 ◽  
Vol 29 (4) ◽  
pp. 397-406 ◽  
Author(s):  
Pietro Scarone ◽  
Gabriele Vincenzo ◽  
Daniela Distefano ◽  
Filippo Del Grande ◽  
Alessandro Cianfoni ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Radiation Exposure ◽  
Screw Fixation ◽  
Transpedicular Screw ◽  
Significant Difference ◽  
Thoracic And Lumbar Spine ◽  
Surgical Data ◽  
The Mean ◽  
Transpedicular Screw Fixation ◽  
Mobile Ct

OBJECTIVENavigation-enabling technology such as 3D-platform (O-arm) or intraoperative mobile CT (iCT-Airo) systems for use in spinal surgery has considerably improved accuracy over that of traditional fluoroscopy-guided techniques during pedicular screw positioning. In this study, the authors compared 2 intraoperative imaging systems with navigation, available in their neurosurgical unit, in terms of the accuracy they provided for transpedicular screw fixation in the thoracic and lumbar spine.METHODSThe authors performed a retrospective analysis of clinical and surgical data of 263 consecutive patients who underwent thoracic and lumbar spine screw placement in the same center. Data on 97 patients who underwent surgery with iCT-Airo navigation (iCT-Airo group) and 166 with O-arm navigation (O-arm group) were analyzed. Most patients underwent surgery for a degenerative or traumatic condition that involved thoracic and lumbar pedicle screw fixation using an open or percutaneous technique. The primary endpoint was the proportion of patients with at least 1 screw not correctly positioned according to the last intraoperative image. Secondary endpoints were the proportion of screws that were repositioned during surgery, the proportion of patients with a postoperative complication related to screw malposition, surgical time, and radiation exposure. A blinded radiologist graded screw positions in the last intraoperative image according to the Heary classification (grade 1–3 screws were considered correctly placed).RESULTSA total of 1361 screws placed in 97 patients in the iCT-Airo group (503 screws) and in 166 in the O-arm group (858 screws) were graded. Of those screws, 3 (0.6%) in the iCT-Airo group and 4 (0.5%) in the O-arm group were misplaced. No statistically significant difference in final accuracy between these 2 groups or in the subpopulation of patients who underwent percutaneous surgery was found. Three patients in the iCT-Airo group (3.1%, 95% CI 0%–6.9%) and 3 in the O-arm group (1.8%, 95% CI 0%–4.0%) had a misplaced screw (Heary grade 4 or 5). Seven (1.4%) screws in the iCT-Airo group and 37 (4.3%) in the O-arm group were repositioned intraoperatively (p = 0.003). One patient in the iCT-Airo group and 2 in the O-arm group experienced postoperative neurological deficits related to hardware malposition. The mean surgical times in both groups were similar (276 [iCT-Airo] and 279 [O-arm] minutes). The mean exposure to radiation in the iCT-Airo group was significantly lower than that in the O-arm group (15.82 vs 19.12 mSv, respectively; p = 0.02).CONCLUSIONSIntroduction of a mobile CT scanner reduced the rate of screw repositioning, which enhanced patient safety and diminished radiation exposure for patients, but it did not improve overall accuracy compared to that of a mobile 3D platform.

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