Matrix band retainers

US4396374A · kind A · utility

Inventor

• Dan Ericson · Malmö, SE

Key dates

• Filing date: Sep 7, 1982
• Grant date: Aug 2, 1983
• Expiry date: Sep 7, 2002

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61C5/85
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A retainer for securing in position a matrix band around a tooth comprises a body having an upper and a lower end surface, a through-bore which extends between the end surfaces and accommodates a spindle which is rotatable in the body and around which the matrix band can be wound and which has an axial slit starting from the proximal end of the spindle with respect to the lower end surface of the body and arranged for receiving the matrix band, a peripheral surface which is adapted to be applied against a tooth and has a first recess conformed to a first type of tooth, and a first channel which extends through the lower end surface, the first recess and the bore in order to permit the insertion of the matrix band in the channel and in the slit of the spindle from the lower end surface. The peripheral surface also has a second recess which is conformed to a second type of tooth. A second channel extends through the lower end surface, the second recess and the bore.