# Monte Carlo-based in-depth morphological analysis of medullary cavity for designing personalized femoral stem

## TL;DR

This paper introduces a Monte Carlo-based method to better analyze the 3D structure of the femoral marrow cavity, improving the design of personalized femoral stem prostheses.

## Contribution

A novel Monte Carlo-based method is proposed for in-depth 3D morphological analysis of the femoral marrow cavity.

## Key findings

- The Monte Carlo method provides a more accurate and comprehensive analysis of the femoral marrow cavity.
- New anatomically semantic parameters complement existing ones, enhancing understanding of femoral morphology.
- The method supports improved design and clinical selection of femoral stem prostheses.

## Abstract

The design of femoral stem prostheses requires a precise understanding of the femoral marrow cavity. Traditional measurements of morphological parameters in the upper femur, particularly the medullary cavity and cortical region, are primarily based on coronal and sagittal axes, which may not fully capture the true three-dimensional structure of the femur.

Propose a Monte Carlo-based method for a more comprehensive analysis of the femoral marrow cavity, using CT scans of femurs from a selected group of patients. The study aimed to define and calculate anatomically semantic morphological parameters to enhance the understanding of the femoral marrow cavity's anatomical morphological changes, ultimately improving the design and clinical selection of femoral stem prostheses. To enhance the accuracy of femoral stem prosthesis design, this study aims to develop a Monte Carlo-based method for a more comprehensive analysis of the femoral marrow cavity. The proposed method transforms the non-random problem of determining cross-sectional size into a random issue, allowing for the calculation of the size of the medullary cavity and cortical region. Anatomically semantic morphological parameters are then defined, calculated, and analyzed.

The experimental results indicate that the newly defined parameters complement existing ones, providing a more rational scientific basis for understanding the anatomical morphological changes of the femoral marrow cavity.

This research offers essential scientific theoretical support for improved morphologic research, design, and clinical selection of femoral stem prostheses. It holds significant importance and application value in clinical practice, contributing to a more accurate and comprehensive understanding of femoral anatomy for prosthetic design.