The "true" acetabular anteversion angle (AV angle): 2D CT versus 3D model.

Introduction: Different factors can lead to inconsistencies in measurement for the acetabular version using 2D axial CT-cuts. We have defined a "true" anteversion angle (AV angle) in the physiological position of the pelvis in 3D with the largest European population measured to our knowledge.

Material And Methods: We analyzed 258 hemipelvises and created 3D models.

Virtual Periacetabular Osteotomy and Anatomical Measurements.

Objective: To report on a CT scan virtual periacetabular osteotomy (PAO) process to evaluate the potential risk of different PAO cutting planes.

Methods: A total of 123 patients (64 men and 59 women) underwent virtual PAO. We defined two retroacetabular cutting (RC) planes: the RC plane and the RC plane (10 mm posteriorly as compared to the RC plane).

A computer-based comparative quantitative analysis of surgical outcome of mandibular reconstructions with free fibula microvascular flaps.

The free fibula osteoseptocutaneous flap is the standard for reconstruction of extensive mandibular defects. The procedure must be precise to achieve the required functional and aesthetic results. The aim of the present study was to calculate retrospectively the exact differences in surgical outcome based on preoperative and postoperative Computed Tomography data sets.

Virtual reconstruction of pelvic tumor defects based on a gender-specific statistical shape model.

Tumors in the pelvic region cause deformation and destruction of bony structures. Because the original pelvic anatomy cannot be adequately assessed at the tumor site, reconstruction with patient-specific implants is required. A widely used strategy for the reconstructive planning is mirroring of the contralateral side.

3D video-based deformation measurement of the pelvis bone under dynamic cyclic loading.

Background: Dynamic three-dimensional (3D) deformation of the pelvic bones is a crucial factor in the successful design and longevity of complex orthopaedic oncological implants. The current solutions are often not very promising for the patient; thus it would be interesting to measure the dynamic 3D-deformation of the whole pelvic bone in order to get a more realistic dataset for a better implant design. Therefore we hypothesis if it would be possible to combine a material testing machine with a 3D video motion capturing system, used in clinical gait analysis, to measure the sub millimetre deformation of a whole pelvis specimen.

Enabling an unimpeded surgical approach to the skull base in patients with cranial hyperostosis, exemplarily demonstrated for craniometaphyseal dysplasia.

Craniometaphyseal dysplasia is an extremely rare, genetic bone-remodeling disorder. Comparable to osteopetrosis, fibrous dysplasia, and other infrequent conditions, craniometaphyseal dysplasia is characterized by progressive diffuse hyperostosis of the neuro- and viscerocranium. Affected patients present with a pathognomonic dysmorphia: macrocephalus, hypertelorism, bulky facial skeleton, and a prominent mandible.