The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 10, 1981
Filed:
Jun. 06, 1979
Kenneth H Marshall, Castlecrag, AU;
Johnson & Johnson Dental Products Company, East Windsor, NJ (US);
Abstract
Dental impressions are formed without retraction of the gingival tissue by injecting impression material from a syringe having a flexible tubular member positioned over the prepared tooth. The tubular member has a diameter corresponding to the size of the tooth and a tip contoured to the approximate shape of the gingival margin. The tubular member is initially positioned with the contoured tip extending into the gingival sulcus. As the impression material is injected around the tooth the tubular member is slowly withdrawn so that the tooth is fully covered with impression material extending completely into the gingival crevice. A full arch impression tray is then positioned within the mouth of the patient and the impression material allowed to harden.