LAWRENCE FREDERICK ANDREWS, DDS
Dentist at Chatsworth Blvd, San Diego, CA

3959880, Jun 1, 1976

Aug 14, 1974

5/497281

Lawrence F. Andrews - San Diego CA

A61C 700

32 14A

A spring-stressed orthodontic bracket in which the bracket consists of two complementary jaw members which define an archwire groove when brought together in slidable relationship on a base member. A spring-biasing wire extends around or through the periphery forcing them together. Suitable limit pins are utilized in conjunction with a base member for limiting the movement of each of the complementary jaw members. The spring wire can also supply a rotational force against an archwire when installed.

2012029, Nov 22, 2012

May 16, 2012

13/473416

Lawrence F. Andrews - San Diego CA, US
Will A. Andrews - San Diego CA, US

A61C 7/32

433 15

The orthodontic bracket system includes a bracket having a base for attachment to a tooth surface, a stem above the base, tie wings extending from the stem for securing ligatures, and an archwire slot for receiving an archwire defined by the stem and tie wings. Distal and mesial side surfaces of the bracket base are perpendicular to the archwire slot to allow a rotational device to apply rotational force to a tooth perpendicular to the archwire with direct vector-line guidance. Occlusal and gingival edges of the bracket base between the tie wings are scooped-out or recessed to provide more space to receive a tool under an elastic ligature, and select corners of the tie wings are beveled enlarging space to facilitate entry of instruments for removing wire ligatures, to facilitate instrument access for removal and replacement of ligatures, while streamlining tooth rotation to make arch correction more efficient.

4087915, May 9, 1978

Jul 7, 1975

5/593327

Lawrence F. Andrews - San Diego CA

A61C 700

32 14D

A safety face bow having inner and outer wires, the outer wires adapted for coupling to a head cap and/or a neck pad and the inner wires adapted for terminating in an orthodontic buccal tube in which a blunt extension beyond the end of the inner wire is added for the prevention of impalement by the ends of the inner wire if the face bow assembly is pulled out of the patient's mouth. In one embodiment, the outer wire is also removably attached to the inner wire with the additional blunt edge forming a latch for retention of the inner wire should the outer wire be pulled while being worn within the patient's mouth.

D399318, Oct 6, 1998

Aug 22, 1996

D/058740

Lawrence F. Andrews - San Diego CA

2401

D24181

4369033, Jan 18, 1983

Nov 3, 1980

6/203826

David E. Webb - Jamul CA
Lawrence F. Andrews - San Diego CA

"A"-Company, Inc. - San Diego CA

A61C 300

433 9

An orthodontic bracket assembly for bonding to the surface of a tooth is disclosed. The assembly includes a pad and an archwire bracket. A plurality of cavities are provided in the tooth abutting surface of the pad. The walls of the cavities are provided with an irregular surface texture to enhance the bonding between the tooth and the orthodontic bracket. In the preferred embodiment the bracket is cast. The external surface of the bracket is smoothed in a tumbling operation in which the particle size of the abrasive is chosen so that the cavity walls are not subjected to treatment but are left in their irregular, as-cast state. Also disclosed is a method for preparing the mold to produce the cavities in the tooth-abutting surface of the pad.

4725228, Feb 16, 1988

May 1, 1987

7/045100

Lawrence F. Andrews - San Diego CA

A61C 700

433 3

A tooth crown marking device is comprised of markers at each end. The marker at one end is for marking a specified vertical landmark on the face of a tooth crown. The marker at the other end is for marking the horizontal center of a tooth crown. At that end, there is a pair of locating members adjustably mounted on either side of the horizontal marking arm in such a manner that the marking arm is maintained equidistant from the locating members. Pointers at the end of each locating member are adjusted to span the height of the crown. The horizontal center of a tooth crown is then marked by the marking arm which may be movably mounted on a support column along which the two locating members are mounted or mounted to the support column by a swivel arm.

4591341, May 27, 1986

Oct 3, 1984

6/657308

Lawrence F. Andrews - San Diego CA

A61C 300

433 6

An improved orthodontic positioner provides a series of tiny suction devices on the tooth confronting walls of the positioner. These suction devices provide increased adherence of the positioner to the top, inner and outer tooth surfaces of the patient's teeth, and act to mechanically hold the teeth firmly together in their desired place within the positioner.

3930311, Jan 6, 1976

Dec 20, 1973

5/426487

Lawrence F. Andrews - San Diego CA

A61C 700

32 14A

A reinforced orthodontic bracket constructed of a translucent plastic for direct application to a patient's tooth as by an adhesive where the translucent bracket itself has a metallic reinforcement imbedded therein for added structural strength for the prevention of a displacement of the bracket because of forces applied by an arch wire attached thereto.

4097993, Jul 4, 1978

Apr 4, 1977

5/784227

Lawrence F. Andrews - San Diego CA

"A"-Company, Inc. - San Diego CA

A61C 700

32 14A

An orthodontic arch wire having a generally U-shaped configuration including a pair of legs that are generally symmetrical about a mid-point of the arch wire. Each of the legs is composed of a plurality of circular segments of varying radius wherein the point of transition between contiguous segments lies on a common line tangential to both segments.