1. Epidemiology and socieconomic cost of osteoporotic fractures in Greece

   • George Lyritis

   Editorial Pages: 93 - 94

2. Ability of vertebral dimensions from a single radiograph to identify fractures

   • Philip D. Ross
   • James W. Davis
   • Richard D. Wasnich

   Clinical Investigations Pages: 95 - 99

3. Secular trends in the incidence of postmenopausal vertebral fractures

   • Cyrus Cooper
   • Elizabeth J. Atkinson
   • L. Joseph Melton III

   Clinical Investigations Pages: 100 - 104

4. Annual injection of vitamin D and fractures of aged bones

   • Rauno Juhani Heikinheimo
   • Jukka Antero Inkovaara
   • Sulo Antero Rajala

   Clinical Investigations Pages: 105 - 110

5. Crystallographic lattice refinement of human bone

   • R. G. Handschin
   • W. B. Stern

   Clinical Investigations Pages: 111 - 120

6. Antiidiotypic PTH antibodies as a cause of elevated immunoreactive parathyroid hormone in idiopathic hypoparathyroidism, a second case: Another manifestation of autoimmune endocrine disease?

   • Aidan McElduff
   • Martin Lackmann
   • Margaret Wilkinson

   Clinical Investigations Pages: 121 - 126

7. Incorporation of sodium fluoride into cortical bone does not impair the mechanical properties of the appendicular skeleton in rats

   • Thomas A. Einhorn
   • G. K. Wakley
   • D. J. Baylink

   Laboratory Investigations Pages: 127 - 131

8. Cultured embryonic bone shafts show osteogenic responses to mechanical loading

   • Gul Zaman
   • Sarah L. Dallas
   • Lance E. Lanyon

   Laboratory Investigations Pages: 132 - 136

9. Effect of a five-week swimming program on rat bone: A histomorphometric study

   • S. Bourrin
   • F. Ghaemmaghami
   • C. Alexandre

   Laboratory Investigations Pages: 137 - 142

10. Competitive adsorption of magnesium and calcium ions onto synthetic and biological apatites

    • T. Aoba
    • E. C. Moreno
    • S. Shimoda

    Laboratory Investigations Pages: 143 - 150

11. An active neutral metalloproteinase bound to the insoluble collagen in the mineralized phase matrix of adult rat calvaria

    • Makoto Fukae
    • Takako Tanabe
    • Marie Yamada

    Laboratory Investigations Pages: 151 - 155

12. An osteonectin-like protein in the matrix of cultured osteogenic cell-line MC3T3-E1, which is associated with calcification

    • Morimichi Mizuno
    • Hai-Yan Zhou
    • Yoshinori Kuboki

    Molecular and Cellular Biology Pages: 156 - 161

13. Odontogenic tumors in mice carrying albumin-myc and albumin-ras transgenes

    • Carolyn W. Gibson
    • Edward Lally
    • Eric P. Sandgren

    Molecular and Cellular Biology Pages: 162 - 167

14. Announcements

    Announcement Pages: 168 - 168