Evidence of Costoclavicular Joint as A Synovial Joint

Introduction: The present study was conducted to note the osteological evidence of a synovial joint between clavicle and first rib in Indians. Material and Methods: The present study was conducted on 310 pairs of adult clavicles and first ribs, out of which 210 pairs were males and 100 pairs were females obtained from the Anatomy department of Pt. B. D. Sharma Postgraduate Institute of Medical Sciences, Rohtak. The articular facets were studied and measured with the help of a sliding Vernier caliper (Micropole). Results: Among 210 pairs (420 no.) of male clavicles examined, 6 clavicles (2.86%) had a circumscribed smooth articular facet with well-defined margins. Out of these 6 clavicles, 3 (1.43%) were of right side and 3(1.43%) were of left side. A corresponding facet was present on the first ribs of the same skeletons. The facets were found to be present unilaterally and that too in males only. The measurements of the articular facets on the rhomboid area of the clavicles and ribs were-the average length, width and elevation was 7mm, 5.4mm and 2.2mm respectively. Conclusion: These articular facets on the rhomboid area of clavicles and first ribs are osteological evidence of a synovial articulation between clavicle and first rib.

Absence Of Spinous Process, Inferior Articular Facets And Laminae Encountered In A Fifth Lumbar Vertebra Osteology Demonstration: Case Report

There are total of five lumbar verteae. Out of five, four lumbar verteae show typical features. The fifth lumbar vertea shows certain atypical features. Lumbar verteae are identified as having massive kidney–shaped bodies, superior and inferior articular facets, pedicles and thick and quadrangular spine. We observed a malformed lumbar vertea in college bone bank during routine Osteology tutorials.

Morphometric Study of Axis Vertebra in Subjects of Indian Origin

Background: The axis vertebra, exhibits complex and extensive variability in the morphology and there are vital neurovascular structures in its proximity. Knowledge of this variability is important for neurosurgeons, orthopaedicians, otorhynologists and other physicians who in everyday practice are in contact with disorders of the spine and their consequences. Objective: The aim was to evaluate various morphometric dimensions of axis vertebrae and to compare with the available data. Material and Methods: 50 dried human axis vertebrae of Indian origin, available in the Department of Anatomy, Dayanand Medical College and Hospital, Ludhiana were studied. Various dimensions were taken with vernier calipers, metric scale and graph paper. The dimensions were measured in millimetres and statistically analysed with paired t-test. Results: The mean of maximum anteroposterior diameter (max.APD) and maximum transverse diameter (max.TD) of Superior Articular Facet (SAF) was measured as 17.42mm±1.73 and 15.31mm±1.44 on the right side, 17.64mm±1.51 and 15.17mm±1.48 on left side. The mean Distance from Lateral most edge of SAF to Midline was measured as 22.56mm ± 2.37 and 22.40mm ± 2.16 on the right and left sides, respectively. The mean Distance from Tip of Transverse Process to Midline was 26.45mm ± 2.85 on the right and 26.03mm ± 2.64 on the left side. The mean Height of Dens was measured as 13.83mm ± 1.52, mean Width of Dens as 9.57mm ± 0.85. Width of Pedicle was measured as 10.52mm ± 1.99 and 10.61mm ± 1.67on right and left sides, respectively. Conclusion: The knowledge of these dimensions can provide useful information for safe planning of osseous fixation.

Morphometric and Morphological Study of Articular Facets of the Thoracolumbar Vertebral Column in North Indian Population.

Background: The articular processes of thoracolumbar vertebral column play an important role in weight transmission and determining the range and direction of movements between any two vertebrae. Size of these facets has been correlated with the magnitude of stress imposed on them. Purpose of study: The present study has been conducted on the articular processes of 510 vertebrae (thoracic: 360; lumbar:150) with the aim to provide high quality data sets for constructing the models of spine to study mechanics of spinal instrumentation. The length , width and the distance between the right & left superior & inferior articular processes have been measured with the vernier callipers. The presence/ absence of mamillary tubercle has been observed in the present study. Results: The length of thoracic SAFs was almost same at all levels whereas that of the lumbar SAFs increased gradually from L1-L5. However the width showed a variable trend. In case of thoracic IAFs both these parameters showed a variable trend. Whereas in lumbar region, these increased gradually from L1-L5. The distance between two inferior articular processes was more than that between two superior articular processes at almost all levels except T1-T3 & L1-L4 where reverse was true. The mamillary tubercle/process was altogether absent from T-1 to T-8. From T-9 to T-11, the number of vertebral column showing mamillary tubercle increased from 4-19. However at T-12, it was seen in 29 Vertebral columns. In lumbar region, it was well developed in all vertebrae and termed as mamillary process. Conclusion: The measurements obtained by present study reveals the importance of articular facets in understanding basic spinal mechanics and its application with respect to weight transmission.

Measurement of lumbar zygapophyseal joints by using spiral CT and its clinical value / 实用放射学杂志

Objective To study the angle and articular facet curvature of lumbar zygapophyseal joints in adults.Methods The lumbar zygapophyseal joints in 120 healthy subjects without lumbar diseases were detected using spiral CT and mutiple planner re-construction.The angle and articular facet curvature of zygapophyseal joints were measured.The differences in the measured param-eters between male and female or different age groups were compared.Results ①There were no significant differences in the angle of the same lumbar zygapophyseal joints between males and females or different age groups (P >0.05);however,the significant differences in the angle between different lumbar segments were found (P 0.05);however, there were significant differences in the curvature between different lumbar segments (P <0.05).The maximum articular facet cur-vature of L3-L4 was 22.1°±6.0°.Conclusion The angle and articular facet curvature of lumbar zygapophyseal joints varies from different lumbar segments with different contributions for the lumbar stability.