| Abstract: | Conclusions 1. Demineralized human compact bone is a physically nonlinear material with a nonuniform distribution of deformation parameters over the bone cross section.2. At the initial moment of stressing ( 11=0), the modulus of elasticity of demineralized tissue is 380 times less than that of normal tissue. The minimum value of this parameter is in zone 6 (3.32 kgf/mm2) and the maximum value is in zone 1 (7.12 kgf/mm2). With increasing stress, the tangential modulus of elasticity increases.3. The specific energy of deformation under the same stressing conditions 11/*11 expended is greater for demineralized bone than for normal bone.4. The parameter of cross-sectional deformation 12 upon stressing (at 11/*11 from 0.1 to 0.3) increases for demineralized tissue by a factor of 1.56, while for normal tissue this increase is only by a factor of 1.01. The average values of 120·1 and 120·3 for demineralized tissue are 3.3 and 2.2 times, respectively, higher than for normal tissue.5. The greatest correlations for the deformation parameters were found between the internal and external layers of the cross-sectional zones for E10 (0.94) and 120·3 (0.87), though the discrepancies in the zones between the internal and external layers are insignificant (p>0.05).6. The changes in the deformation parameters over the cross section have a positive correlation (with the exception of U10.3) with the amount of ground substance in normal tissue (determined relative to hexosamine).7. The deformation parameters of demineralized tissue may be described by a multi-dimensional linear equation using quantitative indices of the major biochemical components (hydroxyproline, phosphorus, and hexosamine) of normal tissue, which characterize the amounts of collagen, mineral substance, and ground substance, respectively.Institute of Polymer Mechanics, Academy of Sciences of the Latvian SSR, Riga. Translated from Mekhanika Polimerov, No. 1, pp. 101–108, January–February, 1978. |
