ベース用水硬化型リン酸カルシウムセメントの開発とその機械的性質

概要

論文の詳細を見る
A self-setting calcium-phosphate cement was newly formulated and improved in physical properties involving reaction in setting time and increase in compressive strength for a cavity base material. The powder was a mixture of α-TCP (90%) and DCPD (10%) and the liquid was distilled water contaning 5wt% chondroitin sulfate and 12wt% sodium succinate. The crystals were succesfully transformed to hydroxyapatite after setting. The experimental powders were prepared with several variations in particle size and size distribution. The effect of the presence of nuclear particles was also examined. The particles were made by crushing the pre-set cement. The material consisting of the powders 5μm in average size with a broad distribution having 10wt% of nuclear particles showed a short setting time within 5min and a relatively large 1week compressive strength, 75MPa, indicating enough applicability to the cavity base material. We compared this developmental cement compressive strength, bending strength and tensile strength with apatite liner, elite cement 100 and base cement. The mechanical properties of the experimental cement were compared with those of the commercially available cements : a calcium-phosphate cement (Apatite liner, AL), a zincphosphate cement (Elite cement 100, EP), and a glassionomer cement (Base cement, BG). The compressive strength of the experimental cement increased with time and was larger than that of AL and smaller than those of BG and EP during the testing period from 1day through 3months. The tensile strength and bending strength were measured after 1day and 1week storage. The experimental cement showed larger tensile strength than EP and AL but smaller than BG. The bending strength was the largest for the experimental cement after 1day and for BG after 1week. It was found from those results that the experimental self-setting calcium-phosphate cement would be well acceptable for a basing material showing better mechanical properties.
九州歯科学会の論文
1996-06-25

ベース用水硬化型リン酸カルシウムセメントの開発とその機械的性質

スポンサーリンク

概要

著者

関連論文

スポンサーリンク