Results 201 to 210 of about 733,905 (265)

Long‐term strength of aesthetic restoratives

Journal of Oral Rehabilitation, 1998
Glass‐ionomer cements have established an important role in clinical dentistry since their introduction over 20 years ago. More recently, in an attempt to enhance the strength of the material, resin additions have been made to conventional glass‐ionomer cements. This study established the long term flexural strength of two hybrid glass‐ionomer cements,
N, Frankel, G J, Pearson, R, Labella
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Long-term strength of reinforced composites

Mechanics of Composite Materials, 1989
A criterion of long-term strength was proposed for composite materials. The criterion can be used to calculate time to failure for arbitrary loading programs. It was shown that the criterion provides for good agreement with the experimental data not only in the cases of instantaneous and long-term static loadings, but also for fatigue loading in ...
Yu. I. Dimitrienko, I. P. Dimitrienko
openaire   +1 more source

Family strengths in long-term marriages

Lifestyles, 1984
Considerable interest exists in identifying the characteristics of families that exhibit a high level of functioning. Since family strengths may be related to family stability, it is logical to examine long-term marriages for characteristics of strong and durable relationships.
Robert F. MacKinnon, Carol E. MacKinnon, Mary L. Franken   +2 more
openaire   +1 more source

Enzymatic Adaptations Consequent to Long-Term Strength Training*

International Journal of Sports Medicine, 1987
The muscle enzymatic changes subsequent to 6 months of strength training followed by 3 months of detraining were examined in 21 physically active men. They were assigned either to a heavy-resistance (HR) or an explosive strength (EX) training program. Muscle biopsies were obtained from m. vastus lateralis for the assessment of activities of the enzymes
P A, Tesch, P V, Komi, K, Häkkinen
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Long-Term Strength Assessment of Postoperative Diskectomy Patients

Spine, 1989
A test battery was used to measure abdominal and back muscle strength and endurance in 20 patients at least 1 year after surgical diskectomy. There were ten men and ten women. Data on isometric and isokinetic performance were compared with previously reported normal values.
N, Kahanovitz, K, Viola, M, Gallagher
openaire   +2 more sources

Long-term flexural strength, of glass ionomer cements

Biomaterials, 1991
The flexural strength of five glass ionomers was measured at intervals ranging from 1 h to 3 months after mixing. The pattern of change in flexural strength is material-specific with two water-activated materials having significantly higher long-term flexural strengths than the others. This may be attributable to the different polyacrylic acids used or
G J, Pearson, A S, Atkinson
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Analysis of long-term strength criteria

Soviet Applied Mechanics, 1967
The analysis of the durability of structural elements subjected te complex stress is an urgent problem ef modern mechanical engineering. Up to now a unified criterion of long-duration strength, enabling such analyses to be carried out for various temperature and load levels, has not been established.
V. N. Kiselevskii, V. V. Osasyuk
openaire   +1 more source

Long‐term strength of ceramics for biomedical applications

Journal of Biomedical Materials Research Part B: Applied Biomaterials, 2004
AbstractThe influence of slow crack growth on the initiation of radial cracks at the lower surfaces of ceramic layers bonded to polymeric substrates is studied, with particular relevance to biomechanical systems, e.g., dental crowns and hip replacement prostheses.
Yu, Zhang, Brian, Lawn
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