Anatomical Study of the Quadrigeminal Cistern in Patients with Three-Dimensional MR Cisternography

Wassel VI radial polydactyly is associated with metacarpal adduction and radial deviation of the metacarpophalangeal joint of the ulnar duplicate. The soft tissue abnormalities responsible for these deformities were characterized using preoperative multi-planar three-dimensional ultrasound and intraoperative observation in four patients. In all patients, the abductor pollicis brevis and superficial head of the flexor pollicis brevis inserted into the radial first metacarpal, whereas the adductor pollicis and deep head of the flexor pollicis brevis inserted into the ulnar thumb. Aberrant location of the flexor pollicis longus and absence of the A1 pulley system was associated with severe radial deviation. An additional superficial thenar muscle along the ulnar metacarpal was associated with minimal metacarpal adduction. Uneven forces on the ulnar duplicate could be associated with these characteristic deformities and joint instability. Knowledge of these abnormalities allows better planning of surgery and further insight into this rare radial polydactyly configuration. Level of evidence: II

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Three-Dimensional Endoscopy — A Useful Tool for Neuroendoscopy? An Anatomical Study Using MRI and Three-Dimensional Endoscopy

Minimally Invasive Techniques for Neurosurgery ◽

10.1007/978-3-642-58731-3_7 ◽

1998 ◽

pp. 37-45

Author(s):

M. Meinhardt ◽

T. Riegel ◽

D. Hellwig ◽

B. L. Bauer

Keyword(s):

Three Dimensional ◽

Anatomical Study

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Three-dimensional morphological analysis of the femoral neck torsion angle—an anatomical study

Journal of Orthopaedic Surgery and Research ◽

10.1186/s13018-020-01712-8 ◽

2020 ◽

Vol 15 (1) ◽

Author(s):

Ru-Yi Zhang ◽

Xiu-Yun Su ◽

Jing-Xin Zhao ◽

Jian-Tao Li ◽

Li-Cheng Zhang ◽

...

Keyword(s):

Femoral Neck ◽

Torsion Angle ◽

Morphological Analysis ◽

Three Dimensional ◽

Anatomical Study ◽

Neck Torsion

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An Anatomical Study of the Medial Canthus Using a Three-Dimensional Model

Aesthetic Plastic Surgery ◽

10.1007/s002660010121 ◽

2001 ◽

Vol 25 (3) ◽

pp. 189-193 ◽

Cited By ~ 31

Author(s):

Hiroshi Yamamoto ◽

Kazuhiko Morikawa ◽

Eiju Uchinuma ◽

Shohei Yamashina

Keyword(s):

Three Dimensional ◽

Anatomical Study ◽

Dimensional Model ◽

Three Dimensional Model ◽

Medial Canthus

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AN ANATOMICAL STUDY OF THE LIGAMENTS OF THE ULNAR COMPARTMENT OF THE WRIST

Hand Surgery ◽

10.1142/s0218810403001844 ◽

2003 ◽

Vol 08 (02) ◽

pp. 219-226 ◽

Cited By ~ 19

Author(s):

Saburo Sasao ◽

Moroe Beppu ◽

Hitoshi Kihara ◽

Kazuaki Hirata ◽

Masayuki Takagi

Keyword(s):

Three Dimensional ◽

Attachment Site ◽

Ulnar Collateral Ligament ◽

Anatomical Study ◽

Styloid Process ◽

Dimensional Structure ◽

Collateral Ligament ◽

Ulnar Styloid ◽

Attachment Sites ◽

Triangular Fibrocartilage

The ligamentous structures of the triangular fibrocartilage complex (TFCC) and their attachments were examined anatomically and histologically using fresh and embalmed cadavers. The TFCC was observed to have a three-dimensional structure consisting of three palmar ligaments — the short radiolunate (SRL), ulnolunate (UL), and ulnotriquetral (UT) ligaments. In addition, the attachment site of the ulnocarpal ligament (UC), which had been previously unknown, was identified. The dorsal components of the TFCC have been previously reported to consist solely of the extensor carpi ulnaris (ECU) subsheath; however, the ligamentous components running from the ulnar styloid process to the triquetrum were found at a layer deeper than the floor of the ECU subsheath. The UC has been reported previously as a two-dimensional structure, but there has been some disagreement as to its attachment sites.2–6,14,15 It is suggested that the dorsal UT ligament should be considered as a separate ligament, based on its different direction and distal attachment site as compared with those of the ulnar collateral ligament (UCL) and ECU subsheath.

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Anatomical Study of the Clavicles in a Chinese Population

BioMed Research International ◽

10.1155/2016/6219761 ◽

2016 ◽

Vol 2016 ◽

pp. 1-7 ◽

Cited By ~ 4

Author(s):

Xu-sheng Qiu ◽

Xiao-bo Wang ◽

Yan Zhang ◽

Yan-Cheng Zhu ◽

Xia Guo ◽

...

Keyword(s):

Chinese Population ◽

Three Dimensional ◽

Anatomical Study ◽

Anatomical Studies ◽

Intramedullary Canal ◽

Significant Difference ◽

New Development ◽

Clavicle Fractures ◽

The Mean ◽

Two Sides

Background. A reemergence of interest in clavicle anatomy was prompted because of the advocacy for operative treatment of midshaft clavicle fractures. Several anatomical studies of the clavicle have been performed in western population. However, there was no anatomical study of clavicle in Chinese population.Patients and Methods. 52 patients were included in the present study. Three-dimensional reconstructions of the clavicles were generated. The length of the clavicle, the widths and thicknesses of the clavicle, curvatures of the clavicle, the areas of the intramedullary canal, and sectional areas of the clavicle were measured. All the measurements were compared between genders and two sides.Results. The mean length of the clavicles was144.2±12.0 mm. Clavicles in males were longer, wider, and thicker than in females; also males have different curvatures in both planes compared with females. The men’s intramedullary canals and sectional areas of the clavicle were larger than those of women. No significant difference between the sides was found for all the measurements.Conclusion. This study provided an anatomical data of the clavicle in a Chinese population. These clavicle dimensions can be applied to the modifications of the contemporary clavicle plate or a new development for the Chinese population.

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Anatomical study of the ostrich (Struthio camelus) foot locomotor system

Indian Journal of Animal Research ◽

10.18805/ijar.9300 ◽

2016 ◽

Cited By ~ 1

Author(s):

Rui Zhang ◽

Haitao Wang ◽

Guiyin Zeng ◽

Changhai Zhou ◽

Runduo Pan ◽

...

Keyword(s):

Theoretical Basis ◽

High Speed ◽

Three Dimensional ◽

Gross Anatomy ◽

Anatomical Study ◽

Heavy Load ◽

Locomotor System ◽

Terrestrial Locomotion ◽

Solid Foundation ◽

Relationship Of

The Ostrich is a native bird of Africa, and is highly accomplished in terrestrial locomotion in desert and grassland environments. The foot is an important segment in the ostrich body, critical for damping vibration, absorbing energy, and maintaining balance; however, detailed information on the ostrich foot is sparse. In this study, the gross anatomy of locomotor system of the ostrich foot was investigated using dissection and medical scan modeling. The paper contains a detailed study of the organizational structure and relative positional relationship of bones, tendons, and ligaments, which can be used for further three-dimensional (3D) reconstruction, providing a solid foundation for the research of high speed, heavy load, and shock absorption mechanisms. The study also provides a theoretical basis for the research of robot travelling mechanisms and vehicles traversing desert or planetary terrain.

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Anatomical Study of the Radius and Center of Curvature of the Distal Femoral Condyle

Journal of Biomechanical Engineering ◽

10.1115/1.4002061 ◽

2010 ◽

Vol 132 (9) ◽

Cited By ~ 13

Author(s):

Jürgen Kosel ◽

Ioanna Giouroudi ◽

Cornie Scheffer ◽

Edwin Dillon ◽

Pieter Erasmus

Keyword(s):

Laser Scanning ◽

Femoral Condyle ◽

Three Dimensional ◽

Anatomical Study ◽

Surface Curvature ◽

Cartilage Tissue ◽

B Splines ◽

Flexion Extension ◽

Total Knee ◽

Two Parameters

In this anatomical study, the anteroposterior curvature of the surface of 16 cadaveric distal femurs was examined in terms of radii and center point. Those two parameters attract high interest due to their significance for total knee arthroplasty. Basically, two different conclusions have been drawn in foregoing studies: (1) The curvature shows a constant radius and (2) the curvature shows a variable radius. The investigations were based on a new method combining three-dimensional laser-scanning and planar geometrical analyses. This method is aimed at providing high accuracy and high local resolution. The high-precision laser scanning enables the exact reproduction of the distal femurs—including their cartilage tissue—as a three-dimensional computer model. The surface curvature was investigated on intersection planes that were oriented perpendicularly to the surgical epicondylar line. Three planes were placed at the central part of each condyle. The intersection of either plane with the femur model was approximated with the help of a b-spline, yielding three b-splines on each condyle. The radii and center points of the circles, approximating the local curvature of the b-splines, were then evaluated. The results from all three b-splines were averaged in order to increase the reliability of the method. The results show the variation in the surface curvatures of the investigated samples of condyles. These variations are expressed in the pattern of the center points and the radii of the curvatures. The standard deviations of the radii for a 90 deg arc on the posterior condyle range from 0.6 mm up to 5.1 mm, with an average of 2.4 mm laterally and 2.2 mm medially. No correlation was found between the curvature of the lateral and medial condyles. Within the range of the investigated 16 samples, the conclusion can be drawn that the condyle surface curvature is not constant and different for all specimens when viewed along the surgical epicondylar axis. For the portion of the condylar surface that articulates with the tibia during knee flexion-extension, the determined center points approximate the location of the centers of rotation. The results suggest that the concept of a fixed flexion-extension axis is not applicable for every specimen.

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Digital anatomical study of screw placement for quadrilateral plate through the middle window of ilioinguinal approach

10.21203/rs.2.16062/v1 ◽

2019 ◽

Author(s):

Bei Zhao ◽

Weidong Mu

Keyword(s):

Inclination Angle ◽

Three Dimensional ◽

Anatomical Study ◽

Chinese Patients ◽

Screw Placement ◽

Insertion Point ◽

Ilioinguinal Approach ◽

Quadrilateral Plate ◽

Dimensional Reconstruction ◽

The Mean

Abstract Background Screw placement directly for quadrilateral plate fractures of the acetabulum is very difficult. This study was performed to simulate the surgical procedure and try to obtain effective and safe screw angles through the middle window of ilioinguinal approach in Chinese patients. Methods We randomly collected the pelvic computed tomography (CT) scans of 50 adults. DICOM-formatted CT-scan images were imported into Mimics software. The three-dimensional reconstruction (3D) digital model of the semi-pelvic was established. In the coronal and sagittal planes, a 3.5 mm cylinder was used to simulate the pathway of the screw from the designated insertion point. The angles of insertion and intersex differences were explored by statistical analyses. Results The screws could be inserted via four angles: medial inclination, lateral inclination, anterior inclination and posterior inclination. The mean minimum medial inclination angle (MIMIA) of insertion point A was 4.96°±1.11° in males and 8.66°±3.40° in females, and the intersex difference was significant. The mean minimum medial inclination angle (MIMIA) of insertion point C was -5.31°±3.69° in males and 1.75°±8.95° in females, and the intersex difference was significant. There were no differences in all the angles between males and females in insertion point B. Conclusions Preoperative measurement and calculation by digital tools before the screw placement for quadrilateral plate fractures of the acetabulum are feasible. Double cortical screws could be placed safely through the middle window of ilioinguinal approach to increase the stability of acetabulum.

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