An association between lunate morphology and scaphoid–trapezium–trapezoid arthritis

The purpose of this study was to determine if an association exists between scaphoid–trapezium–trapezoid arthritis and lunate morphology. Plain neutral posteroanterior radiographs were evaluated for 48 patients with STT arthritis and 96 patients from a control group. Lunate type was determined using...

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Bibliographic Details
Published in:	The Journal of hand surgery, European volume Vol. 34; no. 6; pp. 778 - 782
Main Authors:	MCLEAN, J. M., TURNER, P. C., BAIN, G. I., REZAIAN, N., FIELD, J., FOGG, Q.
Format:	Journal Article
Language:	English
Published:	London, England SAGE Publications 01-12-2009
Subjects:	Aged Aged, 80 and over Carpal Joints - diagnostic imaging Carpal Joints - physiopathology Case-Control Studies Female Humans Lunate Bone - anatomy & histology Lunate Bone - diagnostic imaging Male Middle Aged Osteoarthritis - diagnostic imaging Osteoarthritis - physiopathology Radiography Scaphoid Bone - diagnostic imaging Scaphoid Bone - physiopathology Trapezium Bone - diagnostic imaging Trapezium Bone - physiopathology Trapezoid Bone - diagnostic imaging Trapezoid Bone - physiopathology scaphoid–trapezium–trapezoid STT lunate arthritis morphology
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Summary:	The purpose of this study was to determine if an association exists between scaphoid–trapezium–trapezoid arthritis and lunate morphology. Plain neutral posteroanterior radiographs were evaluated for 48 patients with STT arthritis and 96 patients from a control group. Lunate type was determined using capitate–triquetrum (C-T) distance. A type I lunate was defined as a C-T distance ≤2 mm. A type II lunate was defined as a C-T distance ≥4 mm. Lunate type was recorded and compared between those with STT arthritis and a control group. The groups were similar with regard to age, gender and handedness. Type II lunates were found in 83% of cases with STT arthritis and in 64% of controls. STT OA was associated with type II lunate wrists (P = 0.02; OR = 0.35; CI: 0.15–0.82). We postulate that variations in scaphoid motion secondary to lunate morphology may contribute to the development of STT OA.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1753-1934 2043-6289
DOI:	10.1177/1753193409345201