Title: Pontic having an internal ceramic core

Abstract: A pontic having a core constructed from a ceramic material embedded in a metal mass at least a portion of which is itself covered by a layer of porcelain. One or more pins are initially inserted into the core for facilitating placement of the core subsequent to waxing of same into a pattern in the cavity of a mold while the pattern is invested and the metal mass subsequently cast within the investment. The porcelain covering layer can be added to the casting in a conventional manner once the casting has been removed from the mold and cleaned in an appropriate manner.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Perez, Richard D. (South Pasadena, CA, US)

Application Number: 902885
Filing Date: 1978-05-04
Publication_date: 1980-10-21
Assignee:
Primary Class(es): 433/206 433/202.1
Other Classes:
US Patent Ref:

448745	Mar, 1891	Wright	32/8.
633071	Sep, 1899	Campbell	433/206.
2025344	Dec, 1935	Fischer	32/10.
3052982	Sep, 1962	Weinstein et al.	32/8.
3716418	Feb, 1973	Kochavi	32/8.
4059901	Nov, 1977	Spalten	32/8.

Other Refs:
Primary Examiner: Mancene, Louis G.
Assistant Examiner: Wilson, John J.
Attorney: O'Brien; Clarence A., Jacobson; Harvey B.