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Related Concept Videos

Composite Bodies00:55

Composite Bodies

A composite body is a body made up of multiple parts, connected to form a larger, unified object. Each part has its own weight and center of gravity, which must be considered to determine the center of gravity of the composite body. In cases where the density or specific weight is constant, the center of gravity coincides with the centroid.
Composite bodies have widespread applications in mechanical engineering, from automobiles to aircraft to rockets. For example, an automobile wheel comprises...
Reducing Line Loss01:18

Reducing Line Loss

In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...
Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
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Eccentric Axial Loading in a Plane of Symmetry01:16

Eccentric Axial Loading in a Plane of Symmetry

Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
Deformation of a Beam under Transverse Loading01:15

Deformation of a Beam under Transverse Loading

Understanding beam deflection, particularly for indeterminate beams with overhanging segments and multiple concentrated loads, is crucial for ensuring structural integrity and functionality. The process begins with constructing an accurate free-body diagram, which helps identify the forces and moments acting on the beam. This diagram is vital for visualizing how bending moments vary along the beam's length, influencing its curvature.
The insights from the bending moment diagram extend to...
Design Example: Traverse Angle Computations01:25

Design Example: Traverse Angle Computations

Traverse angle computations are a critical component of surveying, used to compute the internal angles within a closed traverse. A traverse consists of a series of connected lines forming a closed loop, often used for land boundary delineation or mapping. Calculating the internal angles ensures accuracy in the traverse geometry and is essential for checking survey data integrity.The process begins with known azimuths and bearings of the traverse sides. Internal angles at each vertex are...

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A Postoperative Evaluation Guideline for Computer-Assisted Reconstruction of the Mandible
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Computer-assisted orbital and midfacial reconstruction.

Nils-Claudius Gellrich1, Fabian M Eckstein1, Björn Rahlf1

  • 1Department of Oral and Maxillofacial Surgery, Hannover Medical School, Hannover, Germany.

Innovative Surgical Sciences
|December 11, 2023
PubMed
Summary
This summary is machine-generated.

Computer-assisted techniques are essential for orbit and midface reconstruction. Advances in digital planning and patient-specific implants are transforming craniomaxillofacial surgery outcomes.

Keywords:
CAD/CAMcomputer assisted surgerydigital planningpatient-specific implants

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Area of Science:

  • Craniomaxillofacial Surgery
  • Medical Imaging
  • Biomedical Engineering

Background:

  • Computer assistance is crucial for reconstructing the orbit and midface, vital aesthetic areas.
  • Current treatments for midface and orbital deformities are diverse and varied.
  • Aesthetic outcomes are significantly impacted by orbital and midface integrity.

Purpose of the Study:

  • To demonstrate the extensive applications of computer-assistance in contemporary craniomaxillofacial surgery.
  • To highlight advancements in virtual planning, computer-aided design, and guided surgery.
  • To showcase the role of patient-specific implants and image fusion in quality control.

Main Methods:

  • Virtual surgical planning and computer-aided design (CAD) for complex reconstructions.
  • Guided surgery and navigational control systems for enhanced precision.
  • Utilization of patient-specific implants (PSIs) tailored to individual anatomy.
  • Image fusion techniques for accurate pre-operative and post-operative assessment.

Main Results:

  • Significant advancements in digital planning and manufacturing processes are evident.
  • Continuous improvements in technology are enhancing surgical capabilities.
  • Patient-specific implants are expanding possibilities in reconstructive surgery across specialties.

Conclusions:

  • Computer-assisted approaches offer wide utility in modern craniomaxillofacial surgery.
  • Patient-specific implants represent a major advancement, pushing reconstructive surgery boundaries.
  • Digital planning and manufacturing innovations continue to evolve, improving patient care.