𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Dimensional fit of cast titanium restorations

✍ Scribed by H. Herø; M. Syverud; M. Waarli; E. Kleven

Publisher
Springer
Year
1993
Tongue
English
Weight
779 KB
Volume
4
Category
Article
ISSN
0957-4530

No coin nor oath required. For personal study only.

✦ Synopsis

Undersizing of cast Ti crowns has been reported to be a problem. The diameter of standardized, cylindrical crowns was studied in this investigation using a photographic technique and cold moulds. The results show that the dimensional problem can be avoided by selecting a standard phosphate-bonded investment with a sufficiently high thermal expansion coefficient. Appropriate casting conditions with a good vacuum (13.3 Pa) gives only a thin ( < 10 lim) oxide film and reproducible dimensions of the castings. A ZrO 2 coating eliminates or reduces the oxide film and follows the movements of the investment. The diameter of the crown can largely be accounted for by the measured expansion of the investment and thermal contraction of the Ti casting.

📜 SIMILAR VOLUMES

Dental magnesia-based investments for ca
Dental magnesia-based investments for cast titanium crown: setting and fitness
✍ K. Wakasa; M. Yamaki 📂 Article 📅 1995 🏛 Springer 🌐 English ⚖ 267 KB

Titanium crowns were cast using experimental magnesia-based investment mixed with hydrolysed sol. Ten types of hydrolysed sol were used, adding a catalyst to each sol whether the setting (hardening) of the magnesia investment powder appeared within 3 h after mixing. A penetration test using a Vicat

Machinability of cast commercial titaniu
Machinability of cast commercial titanium alloys
✍ Watanabe, I. ;Kiyosue, S. ;Ohkubo, C. ;Aoki, T. ;Okabe, T. 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 293 KB

## Abstract This study investigated the machinability of cast orthopedic titanium (metastable β) alloys for possible application to dentistry and compared the results with those of cast CP Ti, Ti‐6Al‐4V, and Ti‐6Al‐7Nb, which are currently used in dentistry. Machinability was determined as the amou

Scanning acoustic microscopy study of ti
Scanning acoustic microscopy study of titanium-ceramic interface of dental restorations
✍ Wang, Russell R. ;Meyers, Eric ;Katz, J. Lawrence 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 451 KB

Failures that occur in titanium-ceramic restorations are of concern in clinical dentistry. The purpose of this study was to nondestructively characterize the internal cracks and nonadherent defects at the titanium-porcelain interface using scanning acoustic microscopy. Titanium samples coated with p