Real-time monitoring of stresses and displacements in cervical nuclei pulposi during cervical spine manipulation: a finite element model analysis.

Objective: The objective of this study was to research the distribution of stresses and displacements in cervical nuclei pulposi during simulated cervical spine manipulation (CSM).

Methods: A 3-dimensional finite element model of C3/4~C6/7 was established. The detailed mechanical parameters of CSM were analyzed and simulated.

Morphological changes of the in vitro cervical vertebral canal and its cast form during flexion, extension, and lateral bending.

Objective: The purpose of this study was to investigate and measure morphological changes in the vertebral canal and its cast form at the level of the cervical spine in vitro during flexion, extension, and lateral bending in cadaver specimens.

Methods: The morphological changes of vertebral canal and its contents were investigated and measured during experimental flexion, extension, and lateral bending of the cervical spine with 10 fresh specimens (Chinese); the cross-sections and sagittal diameters were also measured by pouring liquid wax into the intervertebral canal.

Results: During lateral bending, the nucleus pulposus was pushed to the opposite side and the inferior cervical nerve roots of the opposite side were stretched.

Variable morphology of the axis vertebrae in 100 specimens: implications for clinical palpation and diagnostic imaging.

Objective: The purpose of this study was to investigate and measure the variable morphologies of axis vertebrae and explore the clinical significance of variations as it may pertain to clinical palpation and diagnostic imaging.

Methods: The common variable morphologies in 100 specimens of intact dry adult axis vertebrae (Chinese) were investigated and measured. The frequencies in deviation of odontoid processes, deviation of spinous processes, and presence of bifid spinous processes were observed.

[Immunization with the fusion protein of GBD of Streptococcus mutans glucan binding protein-A against dental caries in SD rats].

Purpose: To observe the effect of immunization with the fusion protein of GBD of Streptococcus mutans glucan binding protein-A against dental caries.

Methods: Purified fusion protein of GBD of Streptococcus mutans glucan binding protein-A was used to immune SD rats by subcutaneous injection route. The rats were fed with Keyes Diet 2000 and infected by S.

[3D image analysis of nasal orbit fossa through a laser scanner: a new method and application of 3D image].

Objective: This study was to introduce the method for obtaining accurate 3D data of soft tissues using a 3D scanner under non-contact condition and the standard 3D measurement of the nasal orbit fossa for plastic surgery.

Methods: A 3D laser scanner and the Geomagic software were used to obtain the standard facial contour of 30 Chinese people. The nasal orbit fossa, as the feature of beauty, was measured and the data were analyzed.

[Registration of the image data of the Virtual Chinese Female No.1].

In this study, the authors attempt to find a solution for the image registration before three-dimensional reconstruction of digitized Virtual Chinese Female No.1 (VCH-F1) image data can be completed. On the basis of a thorough understanding of the features of the image data, the parameters were determined based on the marker outside the specimen and the least-square procedure performed on the outline offset distance between two images, prior to the completion of the image registration by means of rigid body transformation with the parameters.

[Establishment of Internet-based database of the Virtual Chinese Human dataset].

To establish an Internet-based database for the dataset of Virtual Chinese Human that is accessible to the interested researchers, modifications and compression of the original VCH-format dataset of Virtual Chinese Human were performed before it was uploaded to the server, and RAID0+1 storage technology was adopted with specific download accesses designed for different users. After dataset modification and compression, the data size was considerably reduced to allow convenient data storage and transfer. The RAID0+1 storage technology guarantees the security and high-speed download of data through different means established.

Construction of dataset for Virtual Chinese Male No.1.

Objective: To establish digitized Virtual Chinese Human Male No.1 (VCH-M1) image dataset with a 0.2-mm equal interval.

Palmar tilt changes due to distal radius fractures and radiocarpal instability: a biomechanical study.

Objective: To investigate the impact of dorsally angulated malunited distal radius fractures on the stability of the radiocarpal joint.

Methods: Eight fresh upper limb specimens from 4 human cadavers were obtained, in which radial osteotomy was performed to prepare models of Frykman I distal radius fracture. Pressure-sensitive film was applied to study the changes in the contact area distribution and the pressure load across the radiocarpal joint in response to palmar tilt variation, and the lateral radiograph of the wrist was taken at the end of pressure loading.

A new internal fixation system using vertebral pedicle screw for unstable lumbar spine: an in vitro biomechanical stability evaluation.

Objective: To evaluate the effect of a new internal fixation system utilizing vertebral pedicle screw in fixing unstable lumbar spine in vitro.

Methods: Twelve lumbar spine specimens (L(2 to 5)) obtained from fresh human cadavers were randomly divided into 2 equal groups, namely groups A and B. All intact specimens were subjected to nondestructive testing in 6 loading modalities on a universal testing machine, before complete L(2 to 5) instability was produced by means of a wedge fracture induced by resection of the posterior ligamentous structures.

[Research report of experimental database establishment of digitized virtual Chinese No.1 female].

Objective: To establish digitized virtual Chinese No.1 female (VCH-F1) image database.

Methods: A 19 years old female cadaver was scanned by CT, MRI, and perfused with red filling material through formal artery before freezing and em- bedding.

[The effect of bending and rotation on the lumbar facet joints under load-bearing conditions].

Objective: To evaluate the effect of bending and rotation on the lumbar facet joints under load-bearing conditions.

Methods: Eight lumbar-sacral spines (L1-S1) taken from fresh young adult cadavers were placed on the MTS system. The forces of the two facet joints of the L4-5 motion segments were measured using pressure sensitive films.