𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Creep of posterior dental composites

✍ Scribed by Papadogianis, Yannis ;Boyer, Daniel B. ;Lakes, Roderic S.

Book ID
102291095
Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
472 KB
Volume
19
Category
Article
ISSN
0021-9304

No coin nor oath required. For personal study only.

✦ Synopsis

The creep of microspecimens of posterior dental composites was studied using a torsional creep apparatus. Shear stresses were maintained for 3 h and recovery was followed for 50 h. Creep curves were ob- tained at 21, 37, and 50Β°C and four torque levels. The effect of conditioning the specimens in water up to 8 weeks was studied.

The posterior composites exhibited linear viscoelastic behavior at low deformations. They had higher shear moduli and greater resistance to creep than conventional and microfilled composites. In aging experiments, maximum shear moduli occurred when specimens were 48 h to 1 week old. Subsequent softening was attributed to water absorption. Residual strain was highest when the composites were stressed within 24 h of initiating polymerization. Residual strain was very low in specimens 48 h to 8 weeks of age.

πŸ“œ SIMILAR VOLUMES

Creep of conventional and microfilled de
Creep of conventional and microfilled dental composites
✍ Papadogianis, Yannis ;Boyer, Daniel B. ;Lakes, Roderic S. πŸ“‚ Article πŸ“… 1984 πŸ› John Wiley and Sons 🌐 English βš– 447 KB

The creep of microspecimens of two conventional and two microfilled composites was studied using a torsional creep apparatus. Small stresses below the materials' proportional limits were maintained for 3 h and recovery was monitored for 30 h. Creep curves were obtained at 21.5,37, and 50Β°C, and thre