There is rare studies with regard to sesamoid bone variations of the hand in addition to its prevalence and distribution. This study aims to assess both the prevalence and variation of sesamoid bones of the hand. A retrospective review of posteroanterior (PA) and oblique radiographs of 436 left and 414 right hands of 850 adult patients obtained from four hospitals was performed. All X-ray films...

Traumatic trapeziometacarpal joint dislocation of the thumb accounts for less than 1% of all hand injuries. This injury is even less common in children. Optimal treatment strategies for this injury are still the subject of debate for both children and adults. We report a case of recurrent posttraumatic trapeziometacarpal joint dislocation in an eight-year-old girl. We believe our case is the fi...

Osteoarthritis of the basal joint of the thumb is common, particularly in postmenopausal females, and can cause considerable pain and disability. Incompetence of the volar beak ligament is thought to be the inciting event that eventually leads to joint degeneration in a predictable pattern. The clinical history and examination can reliably lead to the diagnosis. Radiographs are used to stage th...

OBJECTIVE To investigate whether bilateral deep tissue pressure hyperalgesia exists in individuals with unilateral thumb carpometacarpal osteoarthritis (CMC OA). METHODS A total of 32 patients with CMC OA (29 females and 3 males, aged 69-90 years old) and 32 healthy matched controls (29 females and 3 males, aged 70-90 years) were recruited. Pressure pain thresholds (PPTs) were bilaterally ass...

OBJECTIVE The aim of this study was to determine if thumb motor performance metrics varied by movement orientation, direction, and device size during single-handed use of a mobile phone device. BACKGROUND With the increased use of mobile phones, understanding how design factors affect and improve performance can provide better design guidelines. METHOD A repeated measures laboratory experim...