(a.) Three sided, the sides being plane or concave; having three salient angles or edges; trigonal.
Example Sentences:
(1) Midcarpal instability occurs at the triquetral-hamate joint and is characterized by a dynamic subluxation of the joint.
(2) Capitate-hamate-lunate-triquetral fusions reduced compressive strains by 28.5% and tensile strains by 26.3%.
(3) Disruption of the LT ligament is frequently associated with pathology in the ulnar carpal area and may progress to triquetral instability, VISI, and finally, degenerative arthritic changes on the ulnar side of the carpus.
(4) Using the technique for digital subtraction wrist arthrography outlined in this paper, the classic scapho-lunate and lunate-triquetral perforations were delineated.
(5) The contribution of the scapho-lunate and luno-triquetral joints to global wrist motion was studied in 11 fresh-frozen cadaver specimens.
(6) to occur the lunate triquetral interosseous ligament must be disrupted.
(7) A case of hamate dislocation associated with triquetral fracture is presented.
(8) Luno-triquetral instability dogs not appear to be as rare as one is lead to believe.
(9) A rare case of trans-radial styloid, trans-scaphoid, trans-triquetral perilunate dislocation is described.
(10) The authors are reporting a retrospective series of 24 patients which fall into two separate groups: 14 isolated luno-triquetral lesions, 10 associated with a generalized involvement of the proximal carpal row, either as a result of peri lunate dislocation or combined scapho-lunate and luno-triquetral instability without anterior subluxation.
(11) Extra-articular radius fractures were associated with an intracarpal ligamentous tear in 25% and always a luno-triquetral lesion type.
(12) Significant variations in size of triquetral attachment and thickness and consistency of the ulnocarpal ligamentous complex (UCLC) were observed.
(13) We suggest a limited wrist arthrodesis as definitive treatment for symptomatic congenitally incomplete separation of the triquetral-lunate joint, with possible application in incomplete separation of the other intercarpal joints.
(14) Initial radiographs of the patient showed only fractures in the bilateral proximal radius and the right triquetral bone.
(15) Triquetral fractures are relatively uncommon, but when present, often go undiagnosed or are misdiagnosed as lunate fractures.
(16) It is anchored by strong ligaments to the scaphoid on one side and the triquetrum on the other, thus forming a 3-bone intercalary system, which is in turn guided by the palmar distal V-ligament and the dorsal radio-triquetral ligament.
(17) The main ligaments involved in this instability appeared to be the ulnar half of the volar arcuate ligament and the luno-triquetral ligament as division of these ligaments, particularly under axial loads, produced the most significant change in lunate rotation (p less than 0.05).
(18) Restoration of the normal scapholunate interval was not possible until the triquetral fracture was reduced.
(19) In stage I, a complete sectioning of both the dorsal and palmar luno-triquetral ligaments and the interosseous membrane was done.
(20) Laxity of the capitotriquetral ligament results in failure of the triquetral-hamate joint to produce a dorsiflexion moment, and the unbalanced volar flexion moment generated by the scaphoid produces volar intercalated segment instability (VISI).
Triquetrum
Definition:
(n.) One of the bones of the carpus; the cuneiform. See Cuneiform (b).
Example Sentences:
(1) Erosions on the triquetrum and pisiform are frequent in early rheumatoid arthritis and occur characteristically at 3 sites.
(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) The proximal row of carpal bones, including Os scaphoideum, Os lunatum and Os triquetrum, should be considered as a functional unit.
(4) In some Nycticebus, intra-articular tissues separate the ulna from the triquetrum.
(5) Treatment consisted of resection of the triquetrum, followed by intercarpal arthrodesis.
(6) Os multangulum minus and os capitatum as well as os triquetrum and possibly also the os pisiforme showed a synostosis.
(7) Degenerative arthritis of the pisotriquetral joint was diagnosed by point tenderness over the pisiform and crepitus elicited by lateral movement of the pisiform on the triquetrum.
(8) Fusion of the lunate and triquetrum, however, are more common and are more frequent in negroes than in caucasians.
(9) Ulnar midcarpal instability can be treated by ligament repair or by a partial arthrodesis between the triquetrum and the hamate.
(10) The results indicated that the motion of the triquetrum was significantly increased at stage A, particularly after 15 degrees of ulnar deviation.
(11) In all the specimens used in this study, the lateral end of the retinaculum was found to be attached to the distal part of the anterior border of the radius and its medial end was attached to the styloid process of the ulna, the pisiform and the triquetrum.
(12) Such x-rays are, in particular: lateral radioulnar x-ray rotated by 10 degrees in volar direction to assess the os triquetrum; lateral radioulnar x-ray in 10-30 degrees supination to visualise the os pisiforme; carpal tunnel x-ray to assess the entire hollow of the hand, in particular the volar parts of os pisiforme, os hamatum (hamulus) and os trapezium.
(13) All the patients had some type of intercarpal arthrodesis including four capitate-lunate-triquetrum hamate (CLTH), one lunate-triquetrum (LT), one lunate-triquetrum-hamate (LTH), and one triquetrum-hamate (TH).
(14) The X-rays six months later showed an irregular joint space between the lunate and triquetrum bone, while on his left wrist a synostosis between these bones was found.
(15) Group 3 bones, which included the trapezium, the triquetrum, the pisiform, and 92% of the lunates, had rich internal anastomoses and were at least risk of undergoing avascular necrosis.
(16) Motion of the scaphoid, lunate, triquetrum, capitate and hamate was studied.
(17) A case of dorsal dislocation of the triquetrum associated with a dorsal dislocation of the distal radioulnar joint is reported.
(18) A case report of four patients with an synostosis between the lunate and the triquetrum is represented, two of them were members of African people.
(19) The unusual case of fracture and pseudarthrosis of a synostosis between os lunatum and os triquetrum is described.
(20) It is anchored by strong ligaments to the scaphoid on one side and the triquetrum on the other, thus forming a 3-bone intercalary system, which is in turn guided by the palmar distal V-ligament and the dorsal radio-triquetral ligament.