The purpose of this study was to evaluate treatment
results following arthroscopic triangular fibrocartilage complex (TFCC)
debridement for recalcitrant ulnar wrist pain. According to the
treatment algorithm, 66 patients (36 men and 30 women with a mean
age of 38.1 years (15 to 67)) with recalcitrant ulnar wrist pain
were allocated to undergo ulnar shortening osteotomy (USO; n = 24),
arthroscopic TFCC repair (n = 15), arthroscopic TFCC debridement
(n = 14) or prolonged conservative treatment (n = 13). The mean
follow-up was 36.0 months (15 to 54). Significant differences in
Hand20 score at 18 months were evident between the USO group and
TFCC debridement group (p = 0.003), and between the TFCC repair
group and TFCC debridement group (p = 0.029). Within-group comparisons showed
that Hand20 score at five months or later and pain score at two
months or later were significantly decreased in the USO/TFCC repair
groups. In contrast, scores in the TFCC debridement/conservative
groups did not decrease significantly. Grip strength at 18 months
was significantly improved in the USO/TFCC repair groups, but not
in the TFCC debridement/conservative groups. TFCC debridement shows
little benefit on the clinical course of recalcitrant ulnar wrist
pain even after excluding patients with ulnocarpal abutment or TFCC
detachment from the fovea from the indications for arthroscopic
TFCC debridement. Cite this article:
Calcium phosphate cement (CPC) is a promising biomaterial which can be used in numerous medical procedures for bone tissue repairing because of its excellent osteoconductivity. An injectable preparation and relatively short consolidation time are particularly useful characteristics of CPC. However, the low strength of CPC and its brittleness restrict its use. One method for toughening brittle CPC is to incorporate fibrous materials into its matrix to create a composite structure. Fibers are widely used to reinforce matrix materials in a variety of areas. We hypothesized that there must be an optimal fiber length and structure which can balance these conflicting aspects of fiber reinforcement. The purpose of this study is to prove our conjectures that adding a small amount of short fibers significantly improves the hardness and the toughness of CPC while maintaining its injectability with a syringe and that fiber morphologies that have crimps and surface roughness are favorable for reinforcing.Background
Objective
In rabbits and goats, test implants with a porous surface of two layers of Tl-6A;-4V beads were examined at intervals for bond strength with bone. Half of the implants were coated with hydroxyapatite by plasma spray. The bonding strength with bone in the coated specimens was about four times greater than that of the uncoated specimens at two weeks, and twice as strong at six weeks. Twelve weeks after implantation, the strengths were similar. The hydroxyapatite coating of the beads provided earlier and stronger fixation.
