Dental impression tray

Details Dental impression tray Dental impression tray

1999-03-03

2000-06-27

Wilson, John J.

Dentistry

Apparatus

Having static product shaping surface

433 41, 433 42, A61C 900

Patent

active

060799773

ABSTRACT:
A dental impression tray includes venting in the palatal area of the tray that permits excess impression material to be expelled downward and forward as the impression material and tray are forced upward against the patient's teeth when the impression is taken. At least one vent is located along the apex of the palatal shelf portion of the tray. A pressure plate is also employed which lies substantially in the plane of the base of the tray near the back of the tray. The pressure plate provides a reduced pressure against the impression material and also provides a convenient place in the center of the dental tray for the clinician to apply upward finger pressure to control the positioning and pressure of the tray against the patient's teeth as it is applied.

REFERENCES:
patent: 1629177 (1927-05-01), Sahr
patent: 3207153 (1965-09-01), Goldstein
patent: 5064371 (1991-11-01), Smeltzer
patent: 5336086 (1994-08-01), Simmen et al.
patent: 5478235 (1995-12-01), Schuldt et al.
patent: 5752826 (1998-05-01), Andreiko
patent: 5769633 (1998-06-01), Jacobs et al.
patent: 5772432 (1998-06-01), Jordan et al.

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