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An integrated approach to assess structure-to-function relationships in the skeleton.

In general, the disciplines of biomechanics, morphology, densitometry, biochemistry, cell biology and molecular biology have advanced independently of one another. In spite of this fragmentation, there have been incremental increases in our understanding of the organization, mechanical properties, growth, remodeling and repair of the tissues comprising the skeleton. As a practical application, this increased knowledge has greatly improved our capabilities for early diagnosis of bone loss and has proven similarly useful in determining the efficacy of interventions to prevent osteoporosis. This approach, however, has been much less successful in countering several other important musculoskeletal disorders, including arthritis. In the immediate future, a major emphasis will be placed on tissue regeneration (engineering) to restore lost mechanical function to a compromised skeleton. To accomplish this goal, it will be necessary to employ much more sophisticated approaches toward evaluating the structure-to-function relationships, ones which will include integration of the respective contributions of gene expression, cell number and activity, matrix composition and architecture to achieve adequate tissue function.