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DOS Kongressen 2016 ·
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Measurements of trochlea dysplasia: A literature
review with quality assessment of radiological
measurements
Mathias Paiva, Lars Blønd, Per Hölmich, Robert N. Steensen, Gerd Diederichs,
Julian A Feller, Kristoffer Weisskirchner Barfod
Sports Orthopedic Research Center Copenhagen (SORC-C), Department of Orthopedic
Surgery, Copenhagen University Hospital Hvidovre; Zealand University Hospital, Køge
and Aleris-Hamlet Parken; Sports Orthopaedic Research Center Copenhagen (SORC-C),
Department of Orthopaedic Surgery, Copenhagen University Hospital Hvidovre;
Orthopedic Surgery Residency, Mount Carmel Health System, Columbus, Ohio;
Department of Radiology, Charite – Universitaetsmedizin Berlin, Campus Charite Mitte,
Berlin, Germany; OrthoSport Victoria Research Unit, Epworth Healthcare and Deakin
University, Melbourne, Australia; Sports Orthopedic Research Center Copenhagen
(SORC-C), Department of Orthopedic Surgery, Copenhagen University Hospital Hvidovre
Background:
A large number of measurements describing trochlear dysplasia have been
proposed in the literature.
Purpose / Aim of Study:
To make a systematic review with quality assessments of the
known measurements used to describe trochlear dysplasia.
Materials and Methods:
A systematic literature search was conducted in the databases
PubMed and Embase using the search string “trochlea dysplasia OR trochlear dyspla-
sia”. 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.
Findings / 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 trochlear inclination was rated highest by the expert panel. The
crossing sign, the trochlear bump, the TT-TG distance, the trochlear depth and the ven-
tral trochlear prominence also had high ratings.
Conclusions:
The lateral trochlear inclination was rated highest by the expert panel
and is recommended for use in assessment of trochlear dysplasia. The crossing sign, the
trochlear bump, the TT-TG, the trochlear depth and the ventral trochlear 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.
No conflicts of interest reported
102.