| Item type |
Journal Article(1) |
| 公開日 |
2014-02-28 |
| タイトル |
|
|
タイトル |
石膏系急速加熱型埋没材の埋没後経過時間と加熱温度コントロールによる鋳造精度の向上 |
| 言語 |
|
|
言語 |
jpn |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
石膏系急速加熱埋没材 |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
硬化膨張 |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
加熱膨張 |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
鋳造体適合精度 |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| その他（別言語等）のタイトル |
|
|
その他のタイトル |
Improvement in casting accuracy by controlling the time after investment of quick−heating gypsum−bonded investments and heating temperature |
| 著者 |
竹内, 賢
河瀬, 雄治
永沢, 栄
|
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
Strain due to slight misfit between an implant and superstructure increases the risk of implant fracture and resorption of supporting bone. Therefore, the accuracy of the fit of superstructures should be high. The fit accuracy of superstructures fabricated by casting is markedly affected by investment procedures and conditions. Therefore, it is extremely important to clarify changes in the setting and thermal expansion of investments with changes in the conditions of their use. We investigated the relationship between the time course of the water content of quick− heating gypsum−bonded investments after investment and the fit accuracy of castings, evaluated improvement in the casting accuracy, and obtained the following results : 1. The water content of quick−heating gypsum−bonded investments decreases with time after investment. 2. A decrease in the water content of investments reduces the fit accuracy of castings. 3. Water absorption by investments a long time after investment can improve the fit accuracy of castings. 4. The decrease in the fit accuracy of castings due to a reduction in the water content of investment materials is due to the early arrival of the investment temperature at the critical temperature for setting expansion. 5. The setting expansion of investments becomes maximal at a temperature of about 55°C. 6. When castings are preheated for 20 minutes in a hot water tank (55°C), practical application and a very accurate fit can be achieved. |
| 書誌情報 |
松本歯学
巻 39,
号 2,
p. 93-99,
発行日 2013-12-31
|
| 出版者 |
|
|
出版者 |
松本歯科大学学会 |
| ISSN |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0385-1613 |
| 書誌レコードID |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AN00232590 |
| フォーマット |
|
|
内容記述タイプ |
Other |
|
内容記述 |
application/pdf |
| 著者版フラグ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
matsumoto_shigaku39-2-01.pdf (1.4 MB)
