(1) Comparisons of hominoid metacarpals and phalanges reveal differences, many of which are closely linked to locomotor hand postures.
(2) Radiographic manifestations include endosteal sclerosis of the neurocranium with loss of the diploë, osteosclerosis and hyperostosis of the mandible with absence of the normal antegonial notches, endosteal sclerosis of the diaphyses of long bones (including metacarpals and metatarsals), and osteosclerosis of the pelvis.
(3) The authors describe their technique and the results obtained in 24 patients operated on for 41 metacarpals.
(4) We reviewed the results of corrective oseotomies performed with power tools for symptomatic malunions of metacarpal and phalangeal fractures in 10 patients.
(5) Strong cortical bone is an asset in metacarpal reconstruction; it enhances the quality of internal fixation, which in turn allows hand therapy to be started early, an essential treatment following hand injuries.
(6) No gender-related difference exists regarding the shape of the metacarpal surface.
(7) At follow-up an average of 48 (13 to 77) months after operation, four hands had reoperation, with the replacement of six components, five cups and one metacarpal component.
(8) Involvement was prevalent at points of manual stress, i.e., adjacent to metacarpal-phalangeal and interphalangeal joints.
(9) Holding strength and drilling force were compared against a traditional rotary drill using rabbit tibias to approximate the diameter and cortical thickness of human metacarpals.
(10) Formulae for the estimation of stature from metacarpal lengths are presented.
(11) The relationships observed support the following conclusions: (A) the femoral score and the metacarpal index are related to the degree of osteopenia; (B) the biconcavity index reflects the extraskeletal factors that are pathogenic in spinal osteoporosis; (C) a reduced femoral trabecular pattern index is associated with spinal osteoporosis, although this measurement is not related to the degree of osteopenia; and (D) it may be imprudent to diagnose osteoporosis from the presence of lumbar compression fractures.
(12) The extraordinary rearrangements of the metacarpals and phalanges shown in the X-rays are most unusual.
(13) In addition, a comparison was made of the cortical thickness of the second metacarpal bone in the two areas to see if there was any evidence of increased skeletal mineralization in the hard-water area.
(14) A new technique is presented for the treatment of comminuted intraarticular fractures of the base of the thumb metacarpal.
(15) The hypothesis that patterns of sexual dimorphism in transverse dimensions of the metacarpal only reflect sex differences in body size was investigated in a sample of 324 Mexican school children 6.00-10.99 years of age.
(16) A surgical operation, performed to realign the ring and little fingers, revealed a 4 mm thick periosteal sheath explaining the maintenance of a certain degree of stability of the metacarpals despite the massive osteolysis.
(17) This was achieved, both in vivo and at post mortem examination using the metacarpal bone and its covering soft tissue.
(18) In the metacarpal area, the superficialis central sheath presents peritendinous expansions, which realise an uninterrupted connection with each digital sheath.
(19) However, in 54 females patients, aged 35-45 years, a significant correlation was found between the metacarpal index and a "rapidity of bone loss" score.
(20) The authors present a case of metacarpal stress fracture in which the occupational history was key to the diagnosis and management of long-standing hand pain.
Trapezium
Definition:
(n.) A plane figure bounded by four right lines, of which no two are parallel.
(n.) A bone of the carpus at the base of the first metacarpal, or thumb.
(n.) A region on the ventral side of the brain, either just back of the pons Varolii, or, as in man, covered by the posterior extension of its transverse fibers.
Example Sentences:
(1) The authors describe three patients in whom this complication occurred after Silastic replacements of the carpal scaphoid and trapezium bones.
(2) The wrist motion remaining after simulated arthrodeses was as follows: capitate-hamate: flexion (Flx) 98%, extension (Ext) 92%, ulnar deviation (UD) 96%, radial deviation (RD) 90%; scaphoid-lunate: Flx 97%, Ext 91%, UD 90%, RD 91%; scaphoid-trapezium-trapezoid: Flx 86%, Ext 88%, UD 67%, RD 69%; scaphoid-lunate-triquetrum: Flx 91%, Ext 82%, UD 86%, RD 70%; capitate-lunate: Flx 70%, Ext 59%, UD 89%, RD 79%; capitate-hamate-triquetrum: Flx 88%, Ext 79%, UD 88%, RD 81%; hamate-triquetrum: Flx 90%, Ext 85%, UD 89%, RD 94%; scaphoid-trapezium-trapezoid-capitate: Flx 85%, Ext 77%, UD 64%, RD 57%.
(3) Twenty-five patients who presented with symptoms of disabling pain secondary to arthritis at the base of thumb had 29 arthroplasties with silicone rubber trapezium implants.
(4) Although the design features of the Niebauer implant offer theoretical advantages for stability and fixation, this study does not demonstrate better results compared with other types of silicone trapezium implants.
(5) Operation, consisting of resection of the trapezium and shortening by 1.5 cm of the abductor pollicis longus tendon was performed on 16 thumbs.
(6) If there is localized uptake in the area of the trapezium, additional radiographic studies may be necessary to confirm or exclude this fracture.
(7) The fracture of the trapezium can prevent the normal mobility of the thumb, and therefore an anatomical reduction is desirable.
(8) Osteoarthritic involvement of more than one of the articular surfaces of the trapezium was found in a group of 31 hands.
(9) The area under each sensitivity gradient was determined using the trapezium rule.
(10) The first point of reference is fixed and consists of a line projected through the radial articular surface of the second metacarpal with the trapezium.
(11) Trapezium-scaphoid-trapezoid subluxations and trapezoid-capitate-scaphoid-trapezium subluxations or dislocations are rare.
(12) The present study deals with patients in whom the diagnostic procedures applied in rhizoid arthrosis were considered to reveal scaphoid-trapezium-trapezoid (STT) arthrosis.
(13) We studied 18 patients ranging in age from 16 years to 57 years who presented 8 to 78 months (average, 31.7 months) after silicone arthroplasty (four scaphoid, six lunate, one scapholunate, four finger, two wrist, one trapezium, and one ulnar head for metacarpal hemiarthroplasty).
(14) Fractures of the body of the trapezium are uncommon.
(15) After excision of the trapezium, a strip from the flexor carpi radialis was wound around the main portion of the flexor carpi radialis tendon and the abductor pollicis longus.
(16) The patients treated by resection of the trapezium and tendon interposition were more satisfied and had less pain than those treated by implantation of a Swanson prosthesis.
(17) Having performed 100 anatomical dissections we found that in the first dorsal compartment of the wrist besides other tendons there are one or two tendons belonging to a musculo-tendinous unit, not yet described, inserting in the trapezium and acting almost together with the other units going to the first metacarpal.
(18) Excision of the trapezium gave good results with respect to pain relief, but there was loss of thumb stability and strength.
(19) Relationships between the younger, single members of staff were purest catnip to us; we were always turning love triangles into love trapeziums.
(20) The physio-pathology of fractures of the trapezium was investigated by personal experiments conducted in the laboratory on 26 wrists and showed 3 main mechanisms: a fall on the hand with the wrist extended and radially deviated (Manon) and direct commissural trauma combined with various degrees of shearing described by Monsche.