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Related Concept Videos

Fractures: Bone Repair01:27

Fractures: Bone Repair

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 procedure...
Bone Remodeling and Repair01:31

Bone Remodeling and Repair

Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...

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Related Experiment Video

Updated: Jun 5, 2026

An Intramedullary Locking Nail for Standardized Fixation of Femur Osteotomies to Analyze Normal and Defective Bone Healing in Mice
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Construction and validation of a nomogram prediction model for internal fixation failure after proximal femoral

Lin-Feng Wu1, Tian-Shuang Zhang1, Juan Li2

  • 1Department of Orthopedics, The First People's Hospital of Longquanyi District, Chengdu, Sichuan, China.

Medicine
|January 14, 2025
PubMed
Summary

Internal fixation failure after proximal femoral nailing for intertrochanteric femur fractures is linked to unstable fractures, comorbidities, osteoporosis, large cusp distance, and poor reduction quality. These factors help predict and prevent surgical complications.

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Clinical Research

Background:

  • Intertrochanteric femur fractures are common, particularly in older adults.
  • Internal fixation using intramedullary nails is a standard treatment.
  • Failure of internal fixation can lead to significant morbidity and revision surgery.

Purpose of the Study:

  • To identify independent risk factors for internal fixation failure in proximal femoral anti-rotation intramedullary nailing.
  • To develop a nomogram prediction model for internal fixation failure.
  • To improve surgical outcomes for intertrochanteric femur fractures.

Main Methods:

  • Retrospective collection of clinical data from 374 patients.
  • Univariate and multivariate logistic regression analyses to identify risk factors.
  • Development and validation of a nomogram prediction model using ROC, calibration, and decision curve analyses.

Main Results:

  • The internal fixation failure rate was 15.24% (57 out of 374 patients).
  • Five independent risk factors for failure were identified: unstable fracture, comorbid underlying disease, severe osteoporosis, cusp distance >30 mm, and poor fracture reduction quality.
  • A predictive nomogram was established based on these factors.

Conclusions:

  • Internal fixation failure after intertrochanteric femur fracture surgery is multifactorial.
  • The developed nomogram can aid orthopedic surgeons in identifying high-risk patients.
  • Proactive management strategies for high-risk individuals can improve surgical success rates.