Defining trapezial dysplasia – analysis of trapezial inclination in a normal population

Royen, Kjell Van; Scheerlinck, Thierry; Royen, Arn Van; Keyzer, Pieter-Bastiaan De; Baetslé, Amaury; Goubau, Jean

doi:10.1177/17531934221075921

Cited by 4 publications

(2 citation statements)

References 29 publications

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“…A dysplastic trapezium is defined as one with an increased slope of the distal articular surface with the potential to cause radial subluxation of the first metacarpal and instability of the TMC joint. If a patient has a dysplastic trapezium and symptomatic instability, an opening wedge trapezial osteotomy may be necessary to correct the slope of the distal articular surface and stabilize the forces around the TMC joint (Goubau et al., 2012; Van Royen et al., 2022). This procedure has shown to give good results at more than 10 years follow-up when combined with a metacarpal osteotomy (Thuysbaert et al., 2021).…”

Section: Radiographic Measurements – Dysplasiamentioning

confidence: 99%

“…Since these two joint surfaces are always situated in the same plane, the trapezial inclination is less variable than the trapezial tilt and is therefore a more reliable parameter to define trapezial dysplasia. The mean trapezial inclination is 8° and an inclination over 16° is considered to be dysplastic (Van Royen et al., 2022).…”

Section: Radiographic Measurements – Dysplasiamentioning

confidence: 99%

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Radiological imaging of the trapeziometacarpal joint: a historical and clinical perspective

Royen

Vanmierlo

et al. 2022

J Hand Surg Eur Vol

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The opposable thumb provides both stability and mobility and is needed to accomplish different prehensile tasks. The trapezium is a complex bone, with a distal articular surface that is convex in the sagittal plane of the thumb and concave in the coronal plane of the thumb. The numerous additional articulations with the carpus and the oblique orientation to the main plane of the hand makes it difficult to evaluate the trapeziometacarpal joint using standard hand or wrist radiographic views. This review gives an overview of the different radiological views that have been described for the thumb with an emphasis on their historical origin and positioning during radiography. We also describe different measurements and classifications that can be obtained using different thumb radiographs.

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Section: Radiographic Measurements – Dysplasiamentioning

confidence: 99%

Section: Radiographic Measurements – Dysplasiamentioning

confidence: 99%

Radiological imaging of the trapeziometacarpal joint: a historical and clinical perspective

Royen

Vanmierlo

et al. 2022

J Hand Surg Eur Vol

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Assocation between trapezium size and failure of total trapeziometacarpal prosthesis. A survival analysis

Simón-Pérez,

Martín-Ferrero,

Hernandez-Cortes

et al. 2024

Arch Orthop Trauma Surg

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Aims To assess the survival function of cementless total trapezium metacarpal prostheses (TTMPs) at 20 years, to compare survival functions by trapezium size, and to evaluate the association between the instantaneous risk of TTMP failure and small trapezium size using a multivariate Cox regression model. Methods This observational cohort study included 221 consecutive patients with a mean follow-up after TTMP of 137.3 months (maximum of 246 months). Kaplan-Meier and actuarial life-table methods were used to evaluate the survival function of thecohort. Kaplan-Meier survival curves were compared by trapezium size. Multivariate Cox regression analysis was used to determine the effect of potential confounders on the association between small trapezium and the instantaneous risk of TTMP failure. Results At the end of follow-up, there was a 89.01% chance of the TTMP surviving for 246 months or more. There was an association between TTMP survival time and trapezium size showing a significant trend such that the survival curves weresignificantly higher with larger trapezium size (Mantel-Cox test, p = 0.0001; WilcoxonBreslow test, p = 0.0002; Tarone-Ware test, p = 0.0001).The unadjusted Cox regression model showed a significant association between small trapezium size (smaller than 9 mm) and the instantaneous risk of TTPM failure (HR: 7.37, 95% CI: 2.46-22.07). In the multivariate Cox analysis, “age”, “trapezium morphology”, and “complications” were confounders in the association between small trapezium size and the hazard ratio of prosthetic failure (HR = 3.76; 95% CI 0.96 to 13.82). Conclusion These results confirm the long-term functional survival of TTMP prostheses and reveal a significant increase in trend of the survival curve with larger trapezium size. Patient age, trapezium morphology, and the presence of post-surgical complications are confounders in the association between small trapezium size and the hazard ratio of TTMP failure.

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Bone morphological changes of the trapezium and first metacarpal with early thumb osteoarthritis progression

Morton¹,

Peipert²,

Moore³

et al. 2022

Clinical Biomechanics

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Defining trapezial dysplasia – analysis of trapezial inclination in a normal population

Cited by 4 publications

References 29 publications

Radiological imaging of the trapeziometacarpal joint: a historical and clinical perspective

Radiological imaging of the trapeziometacarpal joint: a historical and clinical perspective

Assocation between trapezium size and failure of total trapeziometacarpal prosthesis. A survival analysis

Bone morphological changes of the trapezium and first metacarpal with early thumb osteoarthritis progression

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