Evaluation of Globe Position Asymmetry in Endocrine Orbitopathy Patients and a Control Group - A Computed Tomography-Based 3D Cephalometric Analysis.

Background: Previous studies have shown that patients suffering from endocrine orbitopathy (EO) seem to present with profound asymmetry in proptosis. As asymmetry might pose a major problem in planning decompression surgery, information on the amount of variation between sides and a concise evaluation method should be available. Therefore, a study based on a concise 3D cephalometric analysis was conceived to evaluate globe position.

3-D cephalometry of the the orbit regarding endocrine orbitopathy, exophthalmos, and sex.

Purpose: This study aimed at evaluating the orbital anatomy of patients concerning the relevance of orbital anatomy in the etiology of EO (endocrine orbitopathy) and exophthalmos utilizing a novel approach regarding three-dimensional measurements. Furthermore, sexual dimorphism in orbital anatomy was analyzed.

Methods: Orbital anatomy of 123 Caucasian patients (52 with EO, 71 without EO) was examined using computed tomographic data and FAT software for 3-D cephalometry.

Effect of orbital wall resection areas in the treatment of patients with endocrine orbitopathy.

In patients treated by orbital wall decompression for endocrine orbitopathy (EO) there is limited evidence on the effect of orbital wall resections. Thus, the aim of this study was to evaluate the effect of one, two, and three-wall resections on orbital parameters to determine if any such correlations exist. Preoperative and postoperative data from all patients at a tertiary care centre who underwent decompression surgery from 2010 - 2020 were digitally analysed.

Improved access in minimally invasive temporomandibular joint surgery through a novel endaural template.

Background: Digitally designed surgical templates for minimally invasive temporomandibular joint (TMJ) surgery (MITMJS) are a promising tool for improving the safety of these procedures. Given the TMJ anatomy, the template fitting and intraoperative overview are the most important issues for a safe surgery. This article is a technical advance article that aims to describe an endaural surgical template based on the Moses approach as a possible solution in TMJ surgery.

Evaluation of the Midface by Statistical Shape Modeling.

Purpose: The aim of this investigation was to generate a statistical shape model (SSM) of the midface and evaluate symmetry, gender aspects, and bone thickness.

Methods: About 102 computed tomography scans were analyzed to create the SSM. This included segmentation, landmark attribution, and Procrustes and principal component analysis.

Correction to: Template-based temporomandibular joint puncturing and access in minimally invasive TMJ surgery (MITMJS) - a technical note and first clinical results.

Following publication of the original article [1], the authors reported that the registration number of the ethics approval was accidentally entered under trial registration. A trial registration was not performed by the authors.

Computer-Aided Versus Conventional Planning in Orbital Traumatology Using Preformed Meshes: Development of a New Workflow.

Purpose: Preformed orbital meshes (POMs) are routinely used in orbital traumatology. As the shapes of commercially available POMs differ, we wanted to evaluate whether investigators would use the same POM in a given situation and perform similar virtual positioning. Furthermore, we investigated whether these tasks could be performed more quickly and more reproducibly using a new software workflow.

Template-based temporomandibular joint puncturing and access in minimally invasive TMJ surgery (MITMJS) - a technical note and first clinical results.

Background: Minimally invasive temporomandibular joint surgery (MITMJS) is an option for patients suffering from severe internal derangement or adhesions. To improve TMJ access, a workflow to create surgical templates is introduced.

Methods: A workflow to generate a dividable patient specific template based on CBCT and optical scanning to access the joint is introduced.

Preforming of polydioxanone sheets for orbital wall fractures - A technical note.

Introduction: Polydioxanone (PDS) sheets are commonly used in the treatment of orbital wall fractures. A potential drawback of PDS is that it may be difficult to adapt to the anatomy of the orbital walls. Therefore a study was conceived to test the feasibility of preforming PDS sheets.

Three-dimensional changes of scleral show after surgical treatment of endocrine orbitopathy.

Purpose: Surgery in endocrine orbitopathy should address exophthalmos and adjunct stigmata such as increased lid aperture and scleral show. Secondary to decompression, rehabilitative surgical treatment such as blepharoplasty is routinely used to achieve this goal. Until now, however, there has been no investigation to measure the effect of decompression surgery on scleral show and lid aperture 3-dimensionally.

Template-Based Orbital Wall Fracture Treatment Using Statistical Shape Analysis.

Purpose: Aim of this study was to investigate whether a mold generated from a statistical shape model of the orbit could be generated to provide a cost-efficient means for the treatment of orbital fractures.

Materials And Methods: A statistical shape model was created from 131 computed tomographic (CT) scans of unaffected adult middle European human orbits. To generate the model, CT scans were segmented in Brainlab software, preregistered using anatomic landmarks, trimmed to an identical size, and definitely registered.

Calculation of resected orbital wall areas in the treatment of endocrine orbitopathy.

Purpose: Orbital wall decompression is routinely used to treat proptosis in endocrine orbitopathy. Until now, however, there has been no investigation to measure the area/extent of the removed walls.

Materials And Methods: The inner areas of 154 orbital walls (lateral, inferior, medial) which had been resected in 38 patients were measured using pre- and postsurgical computed tomographic data in Brainlab iPlan software.

Morphologic comparison of preformed orbital meshes.

Purpose: Preformed orbital titanium meshes have been introduced to improve outcomes in the treatment of orbital wall fractures. This study evaluated the geometry of different commercially available orbital meshes and compared them with an average human orbit.

Materials And Methods: Seven commercially available preformed orbital meshes were scanned using an optical scanner.

CAD-CAM-assisted esthetic facial surgery.

Purpose: This report describes a fully digital workflow for computer-assisted esthetic facial surgery planning and guidance.

Material And Methods: Using optical scans, virtual surgery is performed according to the 3-dimensional cephalometric results. Next, surgical templates are generated using rapid prototyping.

Positioning of bone segments during navigated surgery.

Purpose: In navigated craniomaxillofacial surgery, bone segments often have to be repositioned. To keep them reliably in the desired place during referencing and osteosynthesis, a miniature external distractor can be used.

Materials And Methods: The use of a miniature external mandibular distractor is shown in a case of bilateral lateral orbital rim advancement during endocrine orbitopathy decompression surgery.