Anatomic variations of the midcarpal joint

Statistical descriptions of scaphoid and lunate bone shapes

“…The higher dorsal and volar bone sides as found in mode 4 have been previously reported by Kauer (1980) (higher dorsal side) and by Watson et al (1996) and were classified as D-and V-types, for higher dorsal and volar sides and a type N with approximately equal sides. Another classification, proposed by Viegas et al (1990) and Burgess (1990), based on the absence (Type I) or presence (Type II) of a facet that articulates with the hamate was confirmed as the fifth mode of variation in our SSM. The latter variation in the lunate is of importance since significant cartilage erosion at the proximal pole of the hamate is evident at dissection in more than half of the type II lunates, but is not seen in type I lunates (Viegas et al, 1993;Sagerman et al, 1995;Nakamura et al, 2001).…”

Arthroscopic resection of arthrosis of the proximal hamate: a clinical and biomechanical study

“…Burgess, 7 however, in his 1990 report noted a clear association between proximal hamate arthrosis and a LTIL tear. 7 Complete disruption of the LTIL was noted in 9 of 28 wrists, and arthrosis of the proximal hamate was present in 89% of these wrists with LT instability. In another cadav- eric study in 2000 Viegas et al built on their earlier work by identifying the likely cause of proximal hamate arthrosis.…”

“…In 1990 Burgess 7 Viegas et al 10 tried to determine the relationship between various wrist ligament tears and locations of arthritis in the wrist in an even larger cadaveric study in 1993. Although 38% of the wrists with type II lunates were found to have associated proximal hamate arthrosis, they made no mention of a correlation between tears of the LTIL and proximal hamate arthrosis.…”

“…One such subset of patients includes those with arthritic change of the proximal pole of the hamate. Although this condition has been well documented in cadaver studies [7][8][9] and our knowledge continues to increase 10 -12 no substantial study of surgical treatment options exists. 13 In an attempt to provide improved insight into the diagnosis and treatment of this group of patients with arthrosis of the proximal pole of the hamate, both a retrospective clinical review and a biomechanical cadaver study were performed.…”

Morphology and Morphometry of the Distal Articular Surface of Lunate Bone in a Kenyan Population

“…Type II lunate is more prone to degenerative changes in the hamato-lunate joint (HLJ) that may cause ulnar-sided wrist pain (Burgess, 1990;Viegas et al, 1993;Nakamura et al, 2000;Galley et al, 2007;Haase et al, 2007). In Type II lunates the width of the accessory facet ranges from 1-12 mm (Viegas et al, 1993;Lamas et al, 2007).…”