Device for mounting an impression cap on a tooth implant

Patent metadata

Field	Value
Publication number	US-9326832-B2
Application number	US-99613709-A
Country	US
Kind code	B2
Filing date	Apr 8, 2009
Priority date	Jun 6, 2008
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

Secondary part for securing an impression cap ( 72 ) releasably on a tooth implant ( 10 ). The secondary part ( 40 ) is secured on the latter by means of a screw connection. The secondary part ( 40 ) has elastically deformable spring fingers ( 44 ) that cooperate with a wall ( 76 ) of the impression cap ( 72 ). The wall ( 76 ) is dimensionally stable. With a good fit of the impression cap, the device can thus have a slender configuration, such that it is also suitable in particular for use in the front area of the lower jaw.

First claim

The invention claimed is:

1. A combination comprising:
a device for securing an impression cap releasably on a tooth implant, the device comprising a secondary part having a base area that can directly be secured on the tooth implant by a screw connection and at least one spring finger integrally formed on the secondary part and protruding from the base area, and
an impression cap comprising a dimensionally stable wall peripherally delimiting a receiving space in the shape of a blind hole;
wherein the at least one spring finger extends into the receiving space to cooperate with the dimensionally stable wall of the impression cap to form a force fit attachment of the impression cap at the secondary part;
the spring finger having, in its free end area, a snap-in lug that cooperates with an undercut formed on the dimensionally stable wall of the impression cap wherein the undercut is formed on a recess in the impression cap which is limited in the circumferential direction such that it does not extend about the entire circumference of the impression cap and has, in the circumferential direction, an extent which corresponds to, or is only slightly greater than the extent of the snap-in lug and with which the snap-in lug engages in the assembled state in order to fix mutual position of rotation.

2. The combination as claimed in claim 1 , wherein the spring finger and/or the undercut has a support face extending at an acute angle (α) with respect to an axial joining direction (F) in order to form a snap-fit connection that can be released by pulling.

3. The combination as claimed in claim 1 , wherein the secondary part has an outer at least two spring fingers with the snap-in lug.

4. The combination as claimed in claim 1 , wherein the base area has an outer surface which lies free in relation to the tooth implant and on which the dimensionally stable wall of the impression cap bears in an assembled state.

5. The combination as claimed in claim 1 , further comprising a tooth implant, wherein the tooth implant is designed in one piece and has an anchoring portion, which is intended to be inserted in the jaw bone, and a head portion, which is intended to protrude above the jaw bone, and the head portion has a peripheral shoulder on which the impression cap, in an assembled state, bears via a base surface of at least approximately the same shape.

6. The combination as claimed in claim 5 , wherein the peripheral shoulder is in the shape of a truncated cone.

7. The combination as claimed in claim 1 , wherein a peripheral support surface is formed on the secondary part, on which support surface the impression cap bears, in an assembled state, via a base surface of at least approximately the same shape.

8. The combination as claimed in claim 1 , wherein the base area comprises a through hole through which a screw can be inserted for directly securing the secondary part on the tooth implant.

9. The combination as claimed in claim 1 , wherein the tooth implant and the secondary part have cooperating first positioning elements that mutually fix the position of rotation.

10. The combination as claimed in claim 9 , wherein the cooperating first positioning elements have stub with a cross section of a regular polygon, and a recess of matching cross section.

11. The combination as claimed in claim 10 , wherein the cross section is a regular, even-sided polygon.

Assignees

• Zuker Arik
• Raeber Georg
• Straumann Holding Ag

Inventors

• Zuker Arik
• Raeber Georg

Classifications

• A61C8/005 Primary

  Connecting devices for joining an upper structure with an implant member, e.g. spacers · CPC title

• A61C8/0001

  Impression means for implants, e.g. impression coping · CPC title