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Related Concept Videos

Fractures: Bone Repair01:27

Fractures: Bone Repair

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Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the...
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Articulations of the Vertebral Column01:28

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In addition to being held together by the intervertebral discs, adjacent vertebrae also articulate with each other at synovial joints formed between the superior and inferior articular processes called zygapophysial joints (facet joints). These are plane joints that provide for only limited motions between the vertebrae. The orientation of the articular processes at these joints varies in different regions of the vertebral column and serves to determine the types of motions available in each...
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Structural Joints: Cartilaginous Joints01:17

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As the name indicates, at a cartilaginous joint, the adjacent bones are united by cartilage, a tough but flexible type of connective tissue. Unlike synovial joints, these types of joints lack a joint cavity and involve bones joined together by either hyaline cartilage or fibrocartilage.
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Related Experiment Video

Updated: Apr 17, 2026

Minimally Invasive Treatment for Thoracolumbar Burst Fracture Using Sagittal Alignment Screws and A Trauma Reduction Device
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Cement interdigitation and bone-cement interface after augmenting fractured vertebrae: A cadaveric study.

Antonio Krüger1, Ludwig Oberkircher1, Marita Kratz2

  • 1Department of Trauma and Reconstructive Surgery, University Hospital Giessen and Marburg, Marburg, Germany.

International Journal of Spine Surgery
|February 20, 2015
PubMed
Summary

Transpedicular cement augmentation for osteoporotic fractures is effective, but cavity-creating procedures like balloon kyphoplasty reduce cement interdigitation and potentially effectiveness. Non-balloon techniques show superior bone-cement integration.

Keywords:
Bone-cement interfaceInterdigitationKyphoplastyVertebral compression fracturesVertebroplasty

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Area of Science:

  • Orthopedic surgery
  • Biomaterials science
  • Bone biology

Background:

  • Transpedicular cement augmentation is a common treatment for painful osteoporotic vertebral compression fractures.
  • Uncertainty exists regarding the long-term effects of polymethyl methacrylate (PMMA) on trabecular bone.
  • Preservation of trabecular structures and cement-bone interdigitation are crucial for biological healing and biomechanical augmentation.

Purpose of the Study:

  • To evaluate and compare the cement-bone interdigitation of four different augmentation techniques.
  • To assess the impact of void-creating versus non-void-creating procedures on bone structure preservation.

Main Methods:

  • Vertebrae with created wedge fractures were randomized into four groups: balloon kyphoplasty, radiofrequency (RF) kyphoplasty, shield kyphoplasty, and vertebral stenting.
  • A cutting and grinding technique was employed for histologic analysis to examine bone structure and cement interdigitation.

Main Results:

  • Procedures without balloons (RF and shield kyphoplasty) demonstrated significantly higher cement interdigitation percentages (66.45% and 48.61%, respectively) compared to balloon-based methods (16.7% for balloon kyphoplasty, 20.5% for vertebral stenting).
  • Non-balloon techniques also resulted in significantly shorter distances between bone and cement.
  • Cavity-creating procedures showed greater distances between bone and cement.

Conclusions:

  • Void-creating augmentation techniques, such as balloon kyphoplasty and vertebral stenting, significantly reduce cement interdigitation.
  • This reduction in interdigitation may compromise the effectiveness of the augmentation procedures for osteoporotic vertebral fractures.
  • Non-balloon techniques appear to offer superior bone-cement integration.