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EP-4277567-B1 - A MULTI-PIECE DENTAL PROSTHESIS

EP4277567B1EP 4277567 B1EP4277567 B1EP 4277567B1EP-4277567-B1

Inventors

  • Lozada, Italo

Dates

Publication Date
20260506
Application Date
20210215

Claims (12)

  1. A multi-piece dental prosthesis comprising: a threaded implant (13) operable to be implanted into a bone of a patient; an abutment (14) removably engageable with the implant via a prosthetic screw (17) engaged with both the implant (13) and the abutment (14), the abutment having threads (15) on an outer portion at a rear of the abutment, the prosthetic screw (17) removable from the implant (13) by being unscrewed and passing through a central opening of the abutment (14); wherein a front portion (16) of the abutment defines a cross-sectional shape; and wherein a top part of the implant (13) defines an opening having a matching cross-sectional shape to the abutment front portion (16) at its top, the abutment front portion shape and matching opening shape when engaged together, preventing axial rotation of the abutment (14) relative to the implant (13); wherein the implant (13) further defines a threaded opening (52) on its interior beyond the opening having the matching cross section (51), the threaded opening (52) sized to receive the prosthetic screw (17); the multi-piece dental prosthesis further comprising a ti-base (18) comprising a central opening through its height, and having threads (20) extending into the central opening sized to engage with the threads (15) of the abutment; further comprising a crown (61) to be attached to the ti-base (18), wherein the crown (61) defines an opening (62) through its height in communication with the central opening of the ti-base (18;) wherein a cross-section of the opening (62) through the crown is slightly larger than a cross-section of the implant, so as to guide the implant (13) when passed through the opening (62).
  2. The multi-piece dental prosthesis of claim 1 wherein the crown is a portion of a denture (71) attached to the ti-base.
  3. The multi-piece dental prosthesis of claim 1 wherein the crown is a portion of a partial denture attached to the ti-base.
  4. The multi-piece dental prosthesis of claim 1 wherein the implant is self-drilling.
  5. The multi-piece dental prosthesis of claim 1 wherein a head of the prosthetic screw (17) engages with a shoulder of the abutment (14).
  6. The multi-piece dental prosthesis of claim 1 wherein the central opening of the abutment having a shape (41) engageable with a screw-driver.
  7. The multi-piece dental prosthesis of claim 1 wherein a largest cross sectional area of the abutment is greater than a largest cross sectional area of the implant.
  8. The multi-piece dental prosthesis of claim 1, wherein the ti-base further comprises an annular flange at its bottom, which supports the crown (61) when positioned against said flange and around the exterior of the ti-base (18).
  9. The multi piece dental prosthesis of claim 9, wherein the annular flange is configured to abut a gum of a patient when the ti-base (18) is attached to the abutment (14) and is opposite to where the crown is attached to the ti-base.
  10. The multi-piece dental prosthesis of claim 1, wherein the central opening of the ti-base (18) has a cross-sectional area greater than a maximum cross-sectional area of the implant (13), such that the implant can pass through the ti-base.
  11. The multi-piece dental prosthesis of claim 1, wherein the opening (62) of the crown (61) is sized to allow passage of the implant (13) and also the abutment (14).
  12. A multi-piece dental prosthesis comprising: a dental implant system and one of a crown, a denture, or a partial denture removably attached to the dental implant system, the dental implant system comprising: a threaded implant (13) operable to be implanted into a bone of a patient; an abutment (14) removably engageable with the implant via a prosthetic screw (17) engaged with both the implant and the abutment, the abutment (14) having threads (15) on an outer portion at a rear of the abutment, the prosthetic screw (17) removable from the implant (13) by being unscrewed and passing through a central opening of the abutment (14); wherein a front portion (16) of the abutment defines a cross-sectional shape; and wherein a top part of the implant (13) defines an opening having a matching cross-sectional shape to the abutment front portion (16) at its top, the abutment front portion shape and matching opening shape when engaged together, preventing axial rotation of the abutment (14) relative to the implant (13); wherein the implant (13) further defines a threaded opening (52) on its interior beyond the opening having the matching cross section (51), the threaded opening (52) sized to receive the prosthetic screw (17); the multi-piece dental prosthesis further comprising a ti-base (18) comprising a central opening through its height, and having threads (20) extending into the central opening sized to engage with the threads (15) of the abutment; wherein the crown, partial denture, or full denture is to be attached to the ti-base, wherein the crown, partial denture, or full denture defines an opening (62) through its height in communication with the central opening of the ti-base; wherein a cross-section of the opening (62) through the crown, partial denture, or full denture is slightly larger than a cross-section of the implant (13), so as to guide the implant when passed through the opening (62).

Description

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates generally to inner dental implant systems. Specifically, the present invention relates to a multi-piece dental prosthesis system. Description of Related Art Generally, the installation of a dental prosthesis replicating a tooth is performed in two steps. The first step is the installation of a bone screw ("implant") into a bone of a patient. This involves drilling a hole, and then setting a screw. This screw must then set for a period of time to allow the patient's body to adapt and accept the screw, and allow new bone growth in and around the screw. Only after this time period has elapsed can a replica tooth prosthesis (commonly called a "crown") be installed by connecting it to this now secure screw. Usually this connection is via an adhesive. This process requires a substantial amount of a dentist's time, leading to higher costs. Further, the waiting period after the screw is implanted is uncomfortable and difficult for the patient. Further still, the bone target for screw installation, which will be drilled, is often not uniform, and is difficult to estimate. As such, the drilling may easily be off, causing a misaligned screw, or worse. From US 5,527,182, a dental implant abutment is known. The abutment system comprise a base adapted to mount in nonrotating fashion and a fixation screw securing the base to the implant. A core is attached to the base and secured with an appropriate antirotational mechanism. Unguided drilling creates a number of additional difficulties such as maintaining proper drill orientation throughout the entire drilling process. Failure to maintain proper orientation through the entire drill cycle can cause unwanted widening of the drilled hole as well as a non-straight and non-uniform hole. Improper orientation can also cause damage to the adjacent anatomical structures such as perforation of the sinus cavity, puncture or close placement of the implant to the nerve canal, unwanted proximity to the roots of adjacent teeth, perforation of the buccal or lingual alveolar plate of the area in question, among others issues. Therefore, what is needed is a dental prosthesis that may be installed at the same time as the installation of the screw, and that may also aid in guiding proper placement of the drilled hole and screw therein. SUMMARY OF THE INVENTION The present invention is defined in independent claims 1 and 12. The subject matter of this application may involve, in some cases, interrelated products, alternative solutions to a particular problem, and/or a plurality of different uses of a single system or article. In one aspect, a multi-piece dental prosthesis is provided. The prosthesis comprises an implant operable to be implanted into a bone of a patient. An abutment is removably engaged with the implant via a prosthetic screw. The prosthetic screw is engaged with both the implant and the abutment. The prosthetic screw is removable from the abutment by being unscrewed and passing through a central opening of the abutment which extends all the way through from a front to rear of the abutment. The abutment defines threads on an outer portion at a rear of the abutment. A ti-base defines a central opening through its height. The ti-base has threads extending into this central opening which are sized to engage with the threads on the exterior of the abutment. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 provides an exploded view of an embodiment of the dental implant system disclosed herein.FIG. 2 provides a view of an embodiment of a crown base of the dental implant system disclosed herein.FIG. 3A provides a side cutaway view of an embodiment of a prosthetic screw of the dental implant system disclosed herein.FIG. 3B provides a perspective view of an embodiment of a prosthetic screw of the dental implant system disclosed herein.FIG. 4A provides a perspective view of an embodiment of an abutment of the dental implant system disclosed herein.FIG. 4B provides a side cutaway view of an embodiment of an abutment of the dental implant system disclosed herein.FIG. 4C provides a side view of an embodiment of an abutment of the dental implant system disclosed herein.FIG. 5A provides a side cutaway view of an embodiment of an implant of the dental implant system disclosed herein.FIG. 5B provides a side cutaway view of an embodiment of an implant of the dental implant system disclosed herein.FIG. 6 provides a view of an embodiment of a crown which can be mounted on a base of the dental implant system.FIG. 7 provides a view of an embodiment of a denture which can be mounted on multiple base of multiple implants of the dental implant system.FIG. 8 provides a view of a spacer key used for placement of the implant.FIG. 9 provides a view of a placement of the implant using the spacer key. DETAILED DESCRIPTION The detailed description set forth below in connection with the appended drawings is intended as a description of