Surgical treatment of fractures close to joints, especially in osteoporotic patients, is often associated with problems to obtain adequate strength of the bone-implant construct as well as sufficient purchase for screws in the weak bone. One way to address this increasing problem is through the development of new metal implants specifically designed for fixation of fractures in osteopenic bone. An alternative strategy is to develop methods for augmentation of the weak bone that surrounds the metal implant. In most instances augmentation is achieved by using injectable cement to reinforce the bone. Conventional PMMA provides good strength but due to several drawbacks it has never gained general acceptance for fracture augmentation. More recently several injectable cements based on calcium-phosphate, calcium-sulphate or bioglass has been developed for augmentation of fractures in the extremities as well as for vertebral compressive fractures in the spine. On the basis of biomechanical studies and the clinical experience so far, cement augmentation will enable faster rehabilitation, as the strength of the cement makes it possible to allow full weight-bearing earlier than conventional metal implants alone. More clinical studies are needed in order to refine the surgical technique, develop cement types aimed for fracture treatment and define the most appropriate indications and limitations of augmentation for fracture repair.
The purpose of this article is to review the possible use of augmentation as a technique in the treatment of fractures in the extremities as well as in the spine.
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