2017 ISAKOS Biennial Congress ePoster #1715

 

Measurements of Trochlea Dysplasia: A Literature Review with Quality Assessment of Radiological Measurements

Kristoffer W. Barfod, MD, PhD, Copenhagen DENMARK
Mathias Paiva, Medical Student, Copenhagen DENMARK
Per Hölmich, DMSc, Prof., Copenhagen DENMARK
Robert Steensen, Hilliard, OH UNITED STATES
Gerd Diederichs, MD, Berlin GERMANY
Julian A. Feller, FRACS, Melbourne, VIC AUSTRALIA
Lars Blønd, MD, Copenhagen DENMARK

Copenhagen University Hospital Hvidovre, Copenhagen, DENMARK

FDA Status Not Applicable

Summary

This is a systematic review with quality assessments of the known measurements used to describe trochlear dysplasia. Thirty-three unique measurements of trochlea dysplasia were identified. The lateral trochlea inclination was the highest rated measurement followed by the crossing sign, the trochlea bump, the TT-TG, the trochlea depth and the ventral trochlea prominence.

Abstract

Purpose

To make a systematic review with quality assessments of the known measurements used to describe trochlear dysplasia.

Study design: Systematic review.

Methods

A systematic literature search was conducted in the databases PubMed and Embase using the search string “trochlea dysplasia OR trochlear dysplasia”. Papers were screened for their relevance based on predefined parameters and all measurements showing a statistical association between trochlear dysplasia and patellar instability were presented. Four experts evaluated the quality of the measures using a purpose-made quality scale

Results

The search generated 484 papers of which seven were chosen for review. 33 unique measurements were identified and described in order of their date of publication. The lateral trochlea inclination was rated highest by the expert panel. The crossing sign, the trochlea bump, the TT-TG distance, the trochlea depth and the ventral trochlea prominence also had high ratings.

Conclusion

Thirty-three unique measurements of trochlea dysplasia were identified. The lateral trochlea inclination was the highest rated measurement by the expert panel and it is recommended for use in assessment of trochlear dysplasia. The crossing sign, the trochlea bump, the TT-TG, the trochlea depth and the ventral trochlea prominence were also rated well and can be recommended for use. Due to the small size of the expert panel further research and evaluation is warranted.