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Related Experiment Video

Updated: May 21, 2026

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition

Published on: February 23, 2024

The Posterior Condylar Offset Ratio.

Parm Johal¹, Mohammed A Hassaballa, Jonathan D Eldridge

¹Avon Orthopaedic Centre, Southmead Hospital, Westbury-on-Trym, Bristol, BS10 5NB, United Kingdom.

|June 12, 2012

Summary

This summary is machine-generated.

A new Posterior Condylar Offset Ratio was developed for knee arthroplasty. This ratio is reproducible and provides a normal value of 0.44 on radiographs, aiding future research and clinical outcomes.

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Area of Science:

Orthopedic surgery
Biomechanical engineering
Radiology

Background:

Posterior Condylar Offset (PCO) is crucial for knee arthroplasty outcomes.
Quantifying PCO aids in understanding surgical success and patient recovery.
Standardized measurement of PCO is needed for reliable research.

Purpose of the Study:

To define a novel, quantifiable Posterior Condylar Offset Ratio.
To establish a normal value for this ratio using pre-operative radiographs.
To assess the reproducibility of the proposed ratio.

Main Methods:

A new Posterior Condylar Offset Ratio was defined.
Measurements were taken from true lateral radiographs of 100 individuals.
The ratio calculation involved specific landmarks on the distal femur.

Main Results:

The mean Posterior Condylar Offset Ratio was 0.44 (SD 0.02).
The ratio demonstrated high reproducibility with intra-observer and inter-observer errors of 0.899 and 0.882, respectively.
The ratio showed consistency between sexes and adjusted to 0.47 with cartilage thickness considered.

Conclusions:

The proposed Posterior Condylar Offset Ratio is a valuable tool for knee arthroplasty research.
A normal radiographic value of 0.44 is suggested.
The ratio is recommended for use in pre-operative and post-operative knee arthroplasty assessments.