Written by an international group of renowned shoulder surgeons, this book is the most comprehensive, current reference devoted to revision and complex shoulder arthroplasty. The first section thoroughly explains the circumstances under which implants can fail and the details involved in assessing the problems in failed shoulder arthroplasty. The second section describes techniques for revision shoulder arthroplasty, including techniques for both anatomic reconstruction and reverse arthroplasty and the role of arthroscopy in revision surgery. The third section focuses on specific issues for various specialized types of shoulder reconstruction requiring prosthetic arthroplasty. More than 400 illustrations complement the text.
The polar regions, perhaps more than any other places on Earth, give the geophysical scientist a sense of exploration. This sensibility is genuine, for not only is high-latitude ?eldwork arduous with many locations seldom or never visited, but there remains much fundamental knowledge yet to be discovered about how the polar regions interact with the global climate system. The range of opportunities for new discovery becomes strikingly clear when we realize that the high latitudes are not one region but are really two vastly di?erent worlds. The high Arctic is a frozen ocean surrounded by land, and is home to fragile ecosystems and unique modes of human habitation. The Antarctic is a frozen continent without regular human habitation, covered by ice sheets taller than many mountain ranges and surrounded by the Earth’s most forbidding ocean. When we consider global change as applied to the Arctic, we discuss impacts to a region whose surface and lower atmospheric temperatures are near the triple point of water throughout much of the year. The most consistent signatures of climate warming have occurred at northern high latitudes (IPCC, 2001), and the potential impacts of a few degrees increase in surface temperature include a reduction in sea ice extent, a positive feedback to climate warming due to lowering of surface albedo, and changes to surface runo? that might a?ect the Arctic Ocean’s salinity and circulation.
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