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Gestalt principles provide a framework for understanding how humans perceive objects as unified wholes within their context. These principles are essential in explaining the cognitive processes that make sense of complex visual stimuli by organizing them into coherent groups. One fundamental principle is proximity, which posits that objects located close to each other are perceived as a collective group. For instance, when dots are positioned near one another, the visual system interprets them...
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Structuralism, an early psychological theory developed by Wilhelm Wundt and his student Edward Bradford Titchener, sought to dissect the human mind into its most fundamental components. Wundt's groundbreaking work in his laboratory set the stage for Titchener to define structuralism's goal as cataloging the "atoms" of the mind—sensations, images, and feelings—akin to how chemists identify elements of matter.
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Early Postoperative Gait Metrics After Superior Transverse Anatomic Reconstruction (STAR) versus Direct Anterior Total Hip Arthroplasty: A Prospective Comparative Study.

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Related Experiment Video

Updated: Apr 18, 2026

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
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Principles of design and fixation.

Alberto Carli1, Seth Jerabek1

  • 1Adult Reconstruction & Joint Replacement Division, Hospital for Special Surgery, New York, New York.

Seminars in Musculoskeletal Radiology
|January 31, 2015
PubMed
Summary

Total joint arthroplasty restores joint function using implants. This review covers hip arthroplasty implant design, fixation methods, and innovations for improved surgical outcomes.

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Radiology

Background:

  • Total joint arthroplasty is a highly reliable surgical procedure with increasing demand.
  • Understanding implant design and fixation is crucial for joint restoration.

Purpose of the Study:

  • To provide an overview of implant design rationale in arthroplasty.
  • To explain fixation methods in total hip arthroplasty.
  • To review biomechanics and radiologic landmarks of the hip joint.

Main Methods:

  • Review of biomechanics and radiologic landmarks of the hip joint.
  • Description of acetabular and femoral component design features.
  • Explanation of cemented versus cementless implant rationale.

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Main Results:

  • Discussion of how implant geometries and porous coatings meet clinical needs.
  • Exploration of innovations in cementless fixation for arthroplasty.
  • Overview of implant design and fixation principles in total hip arthroplasty.

Conclusions:

  • Current innovations in cementless fixation aim to enhance outcomes in revision surgery.
  • Understanding implant design and biomechanics is key to successful arthroplasty.
  • Total joint arthroplasty demand is projected to rise significantly.