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Lunate morphology as a risk factor of idiopathic ulnar impaction syndrome.
- Source :
-
The bone & joint journal [Bone Joint J] 2017 Nov; Vol. 99-B (11), pp. 1508-1514. - Publication Year :
- 2017
-
Abstract
- Aims: Positive ulnar variance is an established risk factor for idiopathic ulnar impaction syndrome (UIS). However, not all patients with positive ulnar variance develop symptomatic UIS and other factors, including the morphology of the lunate, may be involved. The aim of this study was to clarify the relationship between lunate morphology and idiopathic UIS.<br />Patients and Methods: A cohort of 95 patients with idiopathic UIS (UIS group) was compared with 95 asymptomatic controls with positive ulnar variance. The shape of the lunate was measured using the capitate-triquetrum distance (CTD), ulnar coverage ratio (UCR), radiolunate distance and radiolunate angle. The association of radiographic parameters and lunate types with the development of UIS was investigated in univariable and multivariable analyses. Receiver operating characteristic curves were used to estimate a cutoff for any statistically significant variables.<br />Results: The proportion of type II lunates, which have a medial hamate facet, were significantly higher in the UIS group than in the control group in the univariable analysis (p = 0.001). CTD (odds ratio (OR) 1.52; 95% confidence interval (CI) 1.11 to 2.06; p = 0.008) and UCR (OR 44.78; 95% CI 5.35 to 374.90; p = 0.002) showed a positive association with UIS in the multivariable analysis. Estimated cutoff values were 2.5 mm for the CTD (area under the curve (AUC) = 0.65) and 0.4 for the UCR (AUC = 0.64).<br />Conclusion: The proportion of type II lunates was greater in the UIS group than in the control group. A large UCR, which represents the broad base of the lunate, was positively associated with the development of idiopathic UIS. Cite this article: Bone Joint J 2017;99-B:1508-14.<br /> (©2017 The British Editorial Society of Bone & Joint Surgery.)
- Subjects :
- Adult
Aged
Case-Control Studies
Female
Humans
Joint Diseases diagnostic imaging
Joint Diseases pathology
Lunate Bone diagnostic imaging
Magnetic Resonance Imaging
Male
Middle Aged
Multivariate Analysis
ROC Curve
Radiography
Retrospective Studies
Risk Factors
Syndrome
Ulna diagnostic imaging
Wrist Joint diagnostic imaging
Wrist Joint pathology
Joint Diseases etiology
Lunate Bone anatomy & histology
Ulna pathology
Wrist Joint anatomy & histology
Subjects
Details
- Language :
- English
- ISSN :
- 2049-4408
- Volume :
- 99-B
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- The bone & joint journal
- Publication Type :
- Academic Journal
- Accession number :
- 29092991
- Full Text :
- https://doi.org/10.1302/0301-620X.99B11.BJJ-2016-1238.R2