Jaw model

• US 6,257,895 B1
• Filed: 04/06/2000
• Issued: 07/10/2001
• Est. Priority Date: 04/12/1999
• Status: Expired due to Fees

• Current Assignee: Oestreich, Gerd
• Original Assignee: Oestreich, Gerd
• Inventors: Oestreich, Gerd
• Primary Examiner(s): Ackun, Jr., Jacob K.
• Assistant Examiner(s): FERNSTROM, KURT
• Application Number:
  US09/545,307
• Time in Patent Office: 460 Days
• Field of Search: 434/274, 434/263, 434/264, 433/74, 433/213
• US Class Current: 434/274
• CPC Class Codes: A61C 9/002 Means or methods for correctly replacing a dental model, e.g. dowel pins; Dowel pin positioning means or methods
• CPC Class Codes: G09B 23/283 for dentistry or oral hygiene G09B23/286 takes precedence
• CPC Class Codes: G09B 23/34 with removable parts

Abstract

In a jaw model for demonstrating dental work, anchoring parts (2) designed as imitation tooth stumps and guided in bore holes (10) of a main body (1) are used for securing the workpieces which consist in particular of individual teeth or bridges. To be able to quickly adapt the position and number of the post-shaped anchoring parts (2) to different demonstration conditions, the anchoring parts (2) are spring-mounted in the bore holes (10) so that they can be easily transferred from a first locked position, in which their end is flush with the surface of the main body (1), into a second locked position in which they can be used for securing the respective workpiece.

Claims

1. Jaw model for demonstrating dental work, said jaw model comprising a main body defining a jaw arch, and at least one post-shaped anchoring part simulating a tooth stump;

said jaw model defining a plurality of bore holes for receiving said anchoring parts therein;

means for selectively locking said anchoring part in a first locked position relative to said bore hole in which a top surface of said anchoring part is flush with an outer surface of said main body, and a second locked position relative to said bore hole in which a top surface of said anchoring part extends beyond an outer surface of said main body; and

means for selectively moving said anchoring part between said first and said second locked positions, said means for moving including a spring arranged to exert a resilient force on said anchoring part in a direction towards said second locked position.

2. Jaw model according to claim 1, further including a locking pin (19;

28) for releasably locking each said anchoring part (2;

27) in said first and second locked positions.

3. Jaw model according to claim 2, wherein each said anchoring part (2;

27) has two limit stops (20, 25;

32, 38), one of said limit stops corresponding to said first locked position, and the other of said limit stops corresponding to said second locked position.

4. Jaw model according to claim 2, wherein each said locking pin (19;

28) has an actuating button (3) extending beyond an outer surface of the main body (1).

5. Jaw model according to claim 2, wherein each said anchoring part (2;

27) has a longitudinal axis, and each said locking pin (19;

28) has a longitudinal axis, said anchoring part and said locking pin being arranged such that said respective longitudinal axis intersect at an angle of 90°

.

6. Jaw model according to claim 3, wherein each said locking pin (19;

28) has a section (18;

34) defining an annular groove (17;

33), said locking pin being arranged relative to said anchoring part such that said section (18;

34) of said locking pin is transversely displaceable in a guide slot (16;

35).

7. Jaw model according to claim 6, wherein the locking pin (19;

28) has an end adjoining the annular groove (17;

33), said end defining a head piece (22;

30) adapted to engage the limit stops (20, 25;

32, 38).

8. Jaw model according to claim 6, wherein the guide slot (35) is defined in the anchoring part (27).

9. Jaw model according to claim 7, wherein above the guide slot (16) defined in the anchoring part (27), a transverse bore hole (31) is defined for the head piece (30) of the locking pin (28).

10. Jaw model according to claim 6, further including a sleeve (15) enclosing said anchoring part (2) over part of its length, said guide slot (16) defined in said sleeve (15).

11. Jaw model according to claim 10, wherein the anchoring part (2) consists of a bottom part (7) guided in said sleeve and of a cap (8) screwable onto said bottom part for forming an imitation tooth stump.

12. Jaw model according to claim 11, wherein the cap (8) secures the sleeve (15) in said bore hole (10).

13. Jaw model according to claim 3, wherein each said locking pin (19;

28) has an actuating button (3) extending beyond an outer surface of the main body (1).

14. Jaw model according to claim 3, wherein each said anchoring part (2;

27) has a longitudinal axis, and each said locking pin (19;

28) has a longitudinal axis;

said anchoring part and said locking pin being arranged such that said respective longitudinal axis intersect at an angle of 90°

.

15. Jaw model according to claim 4, wherein each said anchoring part (2;

27) has a longitudinal axis, and each said locking pin (19;

28) has a longitudinal axis;

said anchoring part and said locking pin being arranged such that said respective longitudinal axis intersect at an angle of 90°

.

16. Jaw model according to claim 7, wherein the guide slot (35) is defined in the anchoring part (27).

17. Jaw model according to claim 16, further including a restoring spring (36), wherein each said locking pin (28) is a pressure pin mounted in the main body (1) and is displaceable counter to the action of the restoring spring (36).

18. Jaw model according to claim 7, further including a sleeve (15) enclosing said anchoring part (2) over part of its length, said guide slot (16) defined in said sleeve (15).