The proximal interphalangeal joint: arthritis and deformity

Finger joints are of the most common site of osteoarthritis and include the DIP, PIP and the thumb saddle joint. Joint arthroplasty provides the best functional outcome for painful destroyed PIP joints, including the index finger. Adequate bone stock and functional tendons are required for a successful PIP joint replacement Fixed swan-neck and boutonnière deformity are better served with PIP arthrodesis rather than arthroplasty. Silicone implants are the gold standard in terms of implant choice. Newer two-component joints may have potential to correct lateral deformities and improve lateral stability. Different surgical approaches are used for PIP joint implant arthroplasty according to the needs and the experience of the surgeon. Post-operative rehabilitation is as critical as the surgical procedure. Early protected motion is a treatment goal. Revision and exchange PIP arthroplasty may successfully be used to treat chronic pain, but will not correct deformity. Cite this article: EFORT Open Rev 2019;4 DOI: 10.1302/2058-5241.4.180042

The Design and Analysis of Saw-Milling Working Head for Special Shaped Stone

For a new type of saw-milling composite work-head, using the finite element method and modal analysis tests to get the dynamic characteristics analysis of the system. We have made dynamic parameters analyses which are mode shape, natural frequency and damping ratio of the whole machine and the piece structure of work-head, and identified the weak links of the machine. The research shows that: the composite work-head’ weaknesses are in the sliding saddle joint, and the vibration instability trend would drive the whole machine; the dynamic stiffness of spindle is lower in the low frequency band, and it causes a certain influence on the machining accuracy.

An effect on basic meat quality attributes of a balanced feed mixture with a 10 % share of flaxseed applied in goat kid feeding

The objective of the study was to analyse the slaughter value and physico-chemical properties of goat kids slaughtered at 150 days of age. After weaning, at 60 days of age a balanced feed mixture with a 10 % share of flaxseed was applied in feeding. There was found a significant (P≤0.05) increase in slaughter performance (45.80 %) and primal cuts (leg, saddle joint) obtained in the experimental group. There was also found significantly (P≤0.05) less (by 1 %) fat in the carcass of the aforementioned group. In contrast, a percentage share of meat in the leg (70.60 %) and the carcass (60.71 %) was statistically insignificant although it was slightly higher in the experimental group. The meat of male kids fed flaxseed was darker, (L* 42.60) at P≤0.01, and contained more (P≤0.01) dry matter (24.32 %) and protein (20.97 %) but less (P≤0.05) fat (1.92 %). The sensory assessment revealed similar cooking usefulness of goat kid meat and no statistically significant differences between the groups studied.