EP1562512A1 - Self-limiting occlusion reduction burr and method of use - Google Patents
Self-limiting occlusion reduction burr and method of useInfo
- Publication number
- EP1562512A1 EP1562512A1 EP02778651A EP02778651A EP1562512A1 EP 1562512 A1 EP1562512 A1 EP 1562512A1 EP 02778651 A EP02778651 A EP 02778651A EP 02778651 A EP02778651 A EP 02778651A EP 1562512 A1 EP1562512 A1 EP 1562512A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- burr
- shoulder
- self
- limiting
- reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C3/00—Dental tools or instruments
- A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine
Definitions
- This invention relates to dental burrs, and in particular to a self-limiting occlusal reduction burr and method of use.
- One of the more common dental procedures currently performed is the installation of a crown on a tooth whose state of decay is such that a filling is not a viable option.
- the tooth must first be prepared by removal of sufficient tooth material so that a ceramist can create a crown whose appearance is realistic. At the same time, excessive tooth material should not be removed during this preparation step, in order that the maximum feasible amount of good tooth be left intact.
- a self-limiting occlusal reduction burr which can quickly and easily reduce a tooth surface to a pre-determined depth.
- Design features allowing this object to be accomplished include a burr having a pre-determined burr length, and a shoulder.
- Advantages associated with the accomplishment of this object include reduced time to make tooth surface reductions, along with the associated cost savings and reduction in patient discomfit time.
- Design features allowing this object to be accomplished include a conical shoulder having a major diameter and a minor diameter, a shank attached to the shoulder at the shoulder major diameter, and a burr attached to the shoulder at the shoulder minor diameter.
- Benefits associated with the accomplishment of this object include better tooth cooling during the reduction operation, consequently less chance of tooth nerve damage, and the associated reduction in patient discomfit.
- Design features enabling the accomplishment of this object include a conical shoulder having a major diameter and a minor diameter, a shank attached to the shoulder at the shoulder major diameter, and a burr attached to the shoulder at the shoulder minor diameter .
- Advantages associated with the realization of this object include more accurate tooth material removal and crowns whose appearance is more realistic.
- Method steps allowing this object to be accomplished include determining an appropriate depth reduction required for a given tooth surface, selecting a self-limiting occlusal reduction burr having a burr length and/or burr diameter sized to yield the depth reduction previously determined, making a groove pattern using the self- limiting occlusal reduction burr selected, and using the self-limiting occlusal reduction burr to connect the grooves in order to yield a tooth reduction of the depth previously determined.
- Benefits associated with the accomplishment of this object include reduced time to make tooth surface reductions, along with the associated cost savings and reduction in patient discomfit time.
- Sheet one contains figure 1.
- Sheet two contains figures 2 and 3.
- Sheet three contains figures 4 and 5.
- Sheet four contains figures 6 and 7.
- Figure 1 is a front isometric view of a self-limiting occlusal reduction burr.
- Figure 2 is a side view of a self-limiting occlusal reduction burr cutting a groove in a tooth.
- Figure 3 is a side view of a self-limiting occlusal reduction burr in position, ready to start making a groove into a tooth having a fissure.
- Figure 4 is a side view of tooth into which a groove pattern has been cut.
- Figure 5 is a side view of tooth into which a reduction has been made.
- Figure 6 is a side view of a self-limiting occlusal reduction burr in position, ready to start making a groove into a tooth having a fissure.
- Figure 7 is a side view of a self-limiting occlusal reduction burr making a groove into a tooth having a fissure.
- Figure 1 is a front isometric view of self-limiting occlusal reduction burr 2.
- Self-limiting occlusal reduction burr 2 comprises shank 6 and burr 16 attached to opposite ends of shoulder 12.
- Shank 6 bears indicia 8 which identifies the size groove which may be cut into a tooth using self-limiting occlusal reduction burr 2.
- Shoulder 12 is conical in shape, and comprises shoulder major diameter 10 at one end, and shoulder minor diameter 14 at an opposite end. Shank 6 is rigidly attached to shoulder 12 at shoulder major diameter 10, and burr 16 is rigidly attached to shoulder 12 at shoulder minor diameter 14.
- Burr 16 comprises burr abrasive surface 18, which is used to cut grooves 28 and tooth reductions 34 into tooth 26.
- burr abrasive surface 18 was diamond powder, carbide, tool steel, or other appropriate abrasive surface capable of abrading tooth material.
- shank 6, shoulder 12 and burr 16 are all axially symmetrical about axis 4, that is to say, the cross- sectional shapes of shank 6, shoulder 12 and burr 16 taken at a cut perpendicular to axis 4 would all be circular.
- burr 16 dimensions of burr 16 include burr length 17 and burr diameter 24.
- defining dimensions of shoulder 12 include shoulder major diameter 10, shoulder minor diameter 14, and shoulder angle 20, which is the side view angle between shoulder outer surface 19 and axis 4. In the preferred embodiment, shoulder angle 20 was 45° ⁇ 20°.
- shoulder angle 20 permits coolant spray 22 to be sprayed directly to where it is needed most: the interface between self-limiting occlusal reduction burr 2 and tooth 26 at groove 28.
- shoulder angle 20 allows self-limiting occlusal reduction burr 2 to be positioned properly over fissure 30 (as is illustrated in figure 3) in order to permit a groove 28 to be cut to the proper depth in and around fissure 30 as depicted in figures 6 and 7.
- Figure 6 is a side view of a self-limiting occlusal reduction burr 2 in position, ready to start making a groove 28 into a tooth 26 having a fissure 30.
- Figure 7 is a side view of a self-limiting occlusal reduction burr 2 making a groove 28 into a tooth 26 having a fissure 30.
- the depth groove 28 which may be cut using self-limiting occlusal reduction burr 2 is determined by burr length 17 and burr diameter 24. Either or both these dimensions are identified by means of indicia 8 inscribed on shank 6. Indicia 8 may be any means of communicating this information, including but not limited to numbers, letters, color bands, etc.
- Figure 4 is a side view of tooth 26 into which a groove 28 pattern has been cut.
- Figure 5 is a side view of tooth 26 into which tooth reduction 34 has been made.
- Figures 4 and 5 illustrate two of the instant method steps of tooth reduction in preparation for attaching a crown.
- a self-limiting occlusal reduction burr 2 of correct burr 16 dimensions is selected. This step is important, because burr length 17 serves as a visual aid to make grooves 28 of the correct depth.
- a porcelain to gold crown typically requires a tooth reduction of 2.5 mm
- a porcelain crown requires 2.0 mm
- a pure gold crown 1.5 mm.
- the side of the tooth facing the outside of the mouth may require a 2.5 mm reduction, while the back side of the tooth may be reduced only 1.5 mm.
- self-limiting occlusal reduction burr 2 is used to make a groove of depth such that shoulder minor diameter 14 is flush with the surface of the tooth 26 being prepared. As soon as self-limiting occlusal reduction burr 2 has penetrated the tooth until shoulder minor diameter 14 is flush with the tooth surface, self-limiting occlusal reduction burr 2 is moved sideways in order to produce a constant-depth groove.
- tooth 26 A pattern of these constant-depth grooves 28 is cut into tooth 26 as may be observed in figure 4.
- self-limiting occlusal reduction burr 2 is used to connect the grooves 28 into tooth reduction 34 as is shown in figure 5. Tooth reduction 34 is made of appropriate size and depth as required for the crown to be attached.
- the instant method of use for a self-limiting occlusal reduction burr 2 comprises the following steps:
- step B Selecting a self-limiting occlusal reduction burr having a burr length and/or burr diameter sized to yield the depth reduction determined in step A;
- step B Making a groove pattern using the self-limiting occlusal reduction burr selected in step B, making each groove only deep enough for a self-limiting occlusal reduction burr shoulder minor diameter to be flush with the tooth surface when the burr is touching the bottom of the groove;
- step D Using the self-limiting occlusal reduction burr to connect the grooves in order to yield a tooth reduction of the depth determined in step A.
Landscapes
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2002/034462 WO2004039279A1 (en) | 2001-06-29 | 2002-10-28 | Self-limiting occlusion reduction burr and method of use |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1562512A1 true EP1562512A1 (en) | 2005-08-17 |
EP1562512A4 EP1562512A4 (en) | 2006-12-06 |
Family
ID=34311699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02778651A Withdrawn EP1562512A4 (en) | 2002-10-28 | 2002-10-28 | Self-limiting occlusion reduction burr and method of use |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1562512A4 (en) |
JP (1) | JP2006503664A (en) |
AU (1) | AU2002340302A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101968421B1 (en) * | 2016-11-28 | 2019-04-11 | 박규태 | Dental bur |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2154487A (en) * | 1984-02-24 | 1985-09-11 | North Bel Spa | Abrasive rotating tools |
DE29608197U1 (en) * | 1996-05-06 | 1996-08-01 | Intensiv Sa | Countersink drill for dentistry |
US6213771B1 (en) * | 1999-10-22 | 2001-04-10 | Ultradent Products, Inc. | Incrementally adjustable endodontic instruments |
-
2002
- 2002-10-28 AU AU2002340302A patent/AU2002340302A1/en not_active Abandoned
- 2002-10-28 EP EP02778651A patent/EP1562512A4/en not_active Withdrawn
- 2002-10-28 JP JP2004548241A patent/JP2006503664A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2154487A (en) * | 1984-02-24 | 1985-09-11 | North Bel Spa | Abrasive rotating tools |
US4661064A (en) * | 1984-02-24 | 1987-04-28 | North Bel S.P.A. | Rotating tool for dentistry |
DE29608197U1 (en) * | 1996-05-06 | 1996-08-01 | Intensiv Sa | Countersink drill for dentistry |
US6213771B1 (en) * | 1999-10-22 | 2001-04-10 | Ultradent Products, Inc. | Incrementally adjustable endodontic instruments |
Non-Patent Citations (1)
Title |
---|
See also references of WO2004039279A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU2002340302A1 (en) | 2004-05-25 |
EP1562512A4 (en) | 2006-12-06 |
JP2006503664A (en) | 2006-02-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20050412 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
|
DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20061108 |
|
17Q | First examination report despatched |
Effective date: 20090427 |
|
R17C | First examination report despatched (corrected) |
Effective date: 20090818 |
|
R17C | First examination report despatched (corrected) |
Effective date: 20110816 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20121121 |