CA1043595A - Plastic orthodontic bracket - Google Patents
Plastic orthodontic bracketInfo
- Publication number
- CA1043595A CA1043595A CA226,217A CA226217A CA1043595A CA 1043595 A CA1043595 A CA 1043595A CA 226217 A CA226217 A CA 226217A CA 1043595 A CA1043595 A CA 1043595A
- Authority
- CA
- Canada
- Prior art keywords
- bracket
- ligature
- undercut
- plastic
- tooth
- 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.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
- A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
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
PLASTIC ORTHODONTIC BRACKET
ABSTRACT OF THE DISCLOSURE
An all plastic orthodontic bracket is disclosed which is adapted to be attached directly to the labial surface of a tooth. The bracket has a quasi triangular shaped body as viewed from the facial view to minimize forces being applied to the bracket during mastication and occlusion.
The apical section of the triangular shaped body is adapted to be attached to the incisal section of the tooth and the base of the triangular shaped body is adapted to be attached to the gingival section of the tooth. All surfaces of the bracket body extending from a ligature undercut over the front surface of the bracket body are smooth and convex with the exception of those surfaces defined by an archwire slot and a second slot which is perpendicular to the archwire slot.
Smooth and convex bracket body surfaces substantially lessen plastic fatigue commonly found in prior art plastic ortho-dontic brackets having sharp corners. The ligature undercut is of a depth which is substantially filled by a small gauge archwire or an elastic ring. The relatively shallow depth of the ligature undercut insures that maximum bracket bulk is distributed between the archwire slot and the ligature undercut to lessen the tendency for bracket body fatigue between these points.
ABSTRACT OF THE DISCLOSURE
An all plastic orthodontic bracket is disclosed which is adapted to be attached directly to the labial surface of a tooth. The bracket has a quasi triangular shaped body as viewed from the facial view to minimize forces being applied to the bracket during mastication and occlusion.
The apical section of the triangular shaped body is adapted to be attached to the incisal section of the tooth and the base of the triangular shaped body is adapted to be attached to the gingival section of the tooth. All surfaces of the bracket body extending from a ligature undercut over the front surface of the bracket body are smooth and convex with the exception of those surfaces defined by an archwire slot and a second slot which is perpendicular to the archwire slot.
Smooth and convex bracket body surfaces substantially lessen plastic fatigue commonly found in prior art plastic ortho-dontic brackets having sharp corners. The ligature undercut is of a depth which is substantially filled by a small gauge archwire or an elastic ring. The relatively shallow depth of the ligature undercut insures that maximum bracket bulk is distributed between the archwire slot and the ligature undercut to lessen the tendency for bracket body fatigue between these points.
Description
~043595 BACKGROUND OF THE INVENTION:
Field of the Invention The invention relates to plastic orthodontic `
plastic brackets of the type which are adapted to be directly cemented to the labial surface of a tooth. More particularly, the invention is directed to the shape of the bracket body which lessens the tendency of plastic fatigue found in prior art plaætic brackets.
Description of the Prior Art Prior art plastic orthodontic brackets are geo-metrically configurated to have the same shape as their all metal counterparts. The history of use of plastic orthodontic ~ brackets as a result of this type of design has been replete - with frustration and disappointment caused by bracket distor-tion and breakage. Bracket distortion and breakage manifest themselves in increased clinical time consumption on a per patient basis. As a result of the clinical time expended in replacing broken and distorted plastic brackets, many orthodontists insist upon using all metal brackets even in light of the unaesthetic appearance of the "all metal look".
The following United States patents disclose plas-tic orthodontic brackets which do not have a design which mini-mizes breakage and distortion:
3,303,565 ~ 2,971,258 3,052,027 3,469j314 3,345,745 3,464,112 3,521,355 3,496,637 3,504,438 3,765,091 3,773,850 None of the aforementioned patents embodies a plastic orthodon-tic bracket which is concerned with eliminating bracket break-age or distortion by utilizing a quasi triangular shaped ~ -2-` 104359S
bracket body, more effective material bulk distribution between the archwire slot and a ligature undercut by lessen-ing the depth of the ligature undercut and the use of a smooth convex shape of the bracket body which eliminates sharp angles except in the archwire slot and in a vertical slot disposed perpendicular to the archwire slot which is used for applying meso-distal rotational forces to the tooth to which the bracket is attached.
SUMMARY OF THE INVENTION:
In light of the disadvantages of plastic bracket breakage and distortion, the present invention represents a substantial improvement in minimizing the aforementioned drawbacks by utilizing a design which incorporates the inherent structural properties of plastic as the criteria for shaping the bracket instead of the structural properties of metal.
2a-10~3595 One aspect of the device disclosed herein is the quasi triangular shape of the bracket body as seen from the facial view. When the bracket base is attached to the labial surface of a tooth, the narrower apical section is oriented closest to the incisal section while the wider base portion of the triangular bracket body is oriented closest to the gingival section. The quasi tri-angular shape of the bracket functions to minimize the forces applied to the bracket during mastication and occlu-sion by minimizing the surface area of the bracket which contacts food or other teeth when the jaws are about to close during mastication or occlusion.
Another aspect of the device disclosed herein is the provision of a relatively shallow ligature undercut which extends at least partially around the periphery of the side of the bracket body. The ligature undercut is sub-stantially filled when a small gauge ligature wire or elastic ring is disposed therein. The preferred depth is approxi-mately .015 mm. The use of the shallow ligature undercut insures that the maximum amount of bulk bracket material is located between the ligature undercut and an archwire slot cut in the front surface of the bracket body to lessen the chance of plastic fatigue. The base of the bracket extends away from the ligature undercut a distance sufficient to prevent the adhesive used for attaching the back surface of base portion of the bracket to the labial surface of the~
tooth from occluding the ligature undercut.
A final aspect of the device disclosed herein is that all surfaces on the bracket body as defined from the ligature undercut extending to the archwire slot and to a ~ - 3 -.,.~.
slot disposed perpendicular to the archwise slot which is used for rotating the teeth mesio-distally are smooth and convex to lessen internal stress in the bracket body which is caused by surfaces meeting in sharp corners.
Accordingly, this invention provides a plastic orthodontic bracket comprising a base which is adapted to be attached to the labial surface of a tooth between the gingival and the incisal sections and a single quasi-triangular shaped bracket body extending from the bracket base, an archwire slot cut in the front surface of said body, a ligature undercut extending completely around the periphery of the front surface of said body, and a smooth and convex surface extending from said ligature undercut to said archwire slot.
The invention will be readily appreciated by refer-ence to the detailed description when considered in conjunc-tion with the accompanying drawings in which like reference numerals designate like parts throughout the figures and wherein:
'' ' ' - 3a -~ .
Figure I is a perspective view of a prior art plastic orthodontic bracket;
Figure II is a front view of a plastic orthodontic bracket constructed according to the invention;
Figure III is a side view of a plastic orthoaontic bracket constructed according to the invention; and Figure IV is a top view of a plastic orthodontic bracket constructed according to the invention.
Detailed Description of the Invention Referring to figure I, a typical prior art plastlc orthodontic bracket 10 is shown therein. The bracket 10 is comprised of a base 12 and a body 14. Archwire slot 16 is cut horizontally through the center of the bracket. The upper and lower surfaces 18 and 20 axe of equal width. The bracket 10 may either be cemented to a metal band which encircles a tooth to provide a strong bond therewith or cemented directly to a tooth. As may be seen from inspection of figure 1, the top and bottom surfaces 18 and 20 of bracket 10 each have a substantial surface' area which is contacted by`food or other teeth during mastication and occlusion. This substantial surface area causes the body of the bracket 14 to be subjected to considerable force during mastication or occlusion with the attendant likelihood of stress fatigue in the plastic body 14 of the bracket. A ligature undercut 22 is provided parti-ally around the periphery of the bracket body 14. Ligature undercut 22 is cut so deep that a small gauge ligature wire or adhesive band would not substantially fill the ligature undercut 22. The deep ligature design concept substantially lessens the material bulk distribution between archwire slot 30 16 and ligature undercut 22 with the attendant likelihood of an increase in stress fatigue between these points. Reference numerals 24, 26, and 28 identify sharp edges defined by the 104B5g5 meeting of relatively flat surfaces. Each of these sharp edges represents an internal stress point of the plastic bracket which may fatigue under continued stress.
Referring to figures II-IV, a plastic orthodontic bracket which is constructed according to the present in-vention is shown as it would be attached to a maxillary lateral tooth. Bracket lO has a horizontally disposed arch-wire slot 30 cut in the front surface of the bracket body 32. The rear surface of base 34 of bracket lO is concavely contoured mesio-distally and gingivo-incisally to conform to the labial contour of the tooth to which the bracket is adapted to be attached. The base contour of brackets which are used on different types of teeth are chosen to conform to the different labial contours of those teeth to which the bracket is to be attached. The preferred bracket shape is quasi triangular with top section 36 comprising the base of a triangle while bottom section 38 f~rms the apical section of a triangle. However, other tapered geometrical shapes could also be used. Vertical slot 40 is provided to allow an archwire to be tied in utilizing a mesial or distal rotational force. The preferred position is over the clini-cal crown of the tooth. Ligature undercut 42 is purposely cut shallow enough to be substantially filled by a small gauge ligature wire or elastic ring. Preferably, the depth of ligature undercut 42 is approximately .015 mm or less.
This shallow undercut provides maximum material bulk between the ligature undercut 42 and archwire slot 30 to lessen the chance of plastic fatigue between these points. The ligature undercut 42 is smooth and concave in shape. Extending from ligature undercut 42 over the front surface of the bracket body 32, all surfaces are smooth and convex except the arch-wire and vertical slots 30 and 40 to lessen internal stress 1.0~3595 which normally occurs in plastic brackets which have sharp corners. The base 34 of the bracket 10 is extended, as identified by reference numeral 44, from the ligatur:e ~nder-cut 42 a distance sufficient to prevent the adhesive used for attaching the back surface of the base 34 to the labial surface of the tooth from occluding the ligature undercut 42. The extension 44 is preferably 0.5 mm long. The lip section 46 of the bracket body 32 located next to the liga-ture undercut 42 is relie,ved incisally and gingivally to the archwire to facilitate easy placement of the ligature.
. .
Referring specifically to Figure III, it may be seen that archwire slot 30 is not perpendicular to the plane of the base 34. The archwire sl~ot forms an acute angle which is measured between a perpendicular line from the base of the archwire slot and the base of the bracket which is parallQl to the labial surface of the tooth. This acute angulation produces a built in torque in the bracket which requires less torque to be placed in the archwire. This configuration produces less destructive wear of the plastic material where it is in contact with the sharp corners of the metal wire.
The following table gives the preferred bracket dimensions and angulations which are to be used with different types of teeth.
' ~, ~043595 p, I_ p, ~ It ~q o u E .4 ~ ~ ~
~ O
maxillary central 5.8 6.3 0 21 0.5 maxillary lateral 4.8 5.3 0 14 1.0 maxillary cuspid 5.8 6.3 + 7 0.5 mandibular central 4.8 5.3 0 17 1.0 mandibular lateral 4.3 6.3 0 17 1.0 mandibular cuspid 5.8 6.3 + 4 0.5 To use the bracket, base 34 is cemented to the labial sur-face of the tooth so that the narrow apex section 38 of the bracket body is positioned closest to the incisal edge of a tooth to which the bracket base is attached. This config-uration minimizes the forces applied to the bracket body during mastication and occlusion. While many types of dental adhesives may be used to cement the bracket directly to a tooth, the preferred type of adheslve is disclosed in United States patent application 386,416 filed August 7, 1973.
The preferred type of plastic used in constructing the bracket is chosen from the polycarbonate family. It has the following physical properties: If a filled poly-carbonate is chosen, the shear streng*h should range from 10,000 to 16,000 p.s.i. Deformation at 70 F under a 4000 psi load is less than .1%. If an unfilled polycarbonate is chosen, ~043595 the shear strength should range from 6000 to 8500 psi.
Deformation at 70F under a 4000 psi load is from .1 to .3~.
It should be understood that the foregoing disclosure relates to only a preferred embodiment of the invention and that it is intended to cover all changes and modifications which do not constitute departures from the spirit and scope of the invention.
Field of the Invention The invention relates to plastic orthodontic `
plastic brackets of the type which are adapted to be directly cemented to the labial surface of a tooth. More particularly, the invention is directed to the shape of the bracket body which lessens the tendency of plastic fatigue found in prior art plaætic brackets.
Description of the Prior Art Prior art plastic orthodontic brackets are geo-metrically configurated to have the same shape as their all metal counterparts. The history of use of plastic orthodontic ~ brackets as a result of this type of design has been replete - with frustration and disappointment caused by bracket distor-tion and breakage. Bracket distortion and breakage manifest themselves in increased clinical time consumption on a per patient basis. As a result of the clinical time expended in replacing broken and distorted plastic brackets, many orthodontists insist upon using all metal brackets even in light of the unaesthetic appearance of the "all metal look".
The following United States patents disclose plas-tic orthodontic brackets which do not have a design which mini-mizes breakage and distortion:
3,303,565 ~ 2,971,258 3,052,027 3,469j314 3,345,745 3,464,112 3,521,355 3,496,637 3,504,438 3,765,091 3,773,850 None of the aforementioned patents embodies a plastic orthodon-tic bracket which is concerned with eliminating bracket break-age or distortion by utilizing a quasi triangular shaped ~ -2-` 104359S
bracket body, more effective material bulk distribution between the archwire slot and a ligature undercut by lessen-ing the depth of the ligature undercut and the use of a smooth convex shape of the bracket body which eliminates sharp angles except in the archwire slot and in a vertical slot disposed perpendicular to the archwire slot which is used for applying meso-distal rotational forces to the tooth to which the bracket is attached.
SUMMARY OF THE INVENTION:
In light of the disadvantages of plastic bracket breakage and distortion, the present invention represents a substantial improvement in minimizing the aforementioned drawbacks by utilizing a design which incorporates the inherent structural properties of plastic as the criteria for shaping the bracket instead of the structural properties of metal.
2a-10~3595 One aspect of the device disclosed herein is the quasi triangular shape of the bracket body as seen from the facial view. When the bracket base is attached to the labial surface of a tooth, the narrower apical section is oriented closest to the incisal section while the wider base portion of the triangular bracket body is oriented closest to the gingival section. The quasi tri-angular shape of the bracket functions to minimize the forces applied to the bracket during mastication and occlu-sion by minimizing the surface area of the bracket which contacts food or other teeth when the jaws are about to close during mastication or occlusion.
Another aspect of the device disclosed herein is the provision of a relatively shallow ligature undercut which extends at least partially around the periphery of the side of the bracket body. The ligature undercut is sub-stantially filled when a small gauge ligature wire or elastic ring is disposed therein. The preferred depth is approxi-mately .015 mm. The use of the shallow ligature undercut insures that the maximum amount of bulk bracket material is located between the ligature undercut and an archwire slot cut in the front surface of the bracket body to lessen the chance of plastic fatigue. The base of the bracket extends away from the ligature undercut a distance sufficient to prevent the adhesive used for attaching the back surface of base portion of the bracket to the labial surface of the~
tooth from occluding the ligature undercut.
A final aspect of the device disclosed herein is that all surfaces on the bracket body as defined from the ligature undercut extending to the archwire slot and to a ~ - 3 -.,.~.
slot disposed perpendicular to the archwise slot which is used for rotating the teeth mesio-distally are smooth and convex to lessen internal stress in the bracket body which is caused by surfaces meeting in sharp corners.
Accordingly, this invention provides a plastic orthodontic bracket comprising a base which is adapted to be attached to the labial surface of a tooth between the gingival and the incisal sections and a single quasi-triangular shaped bracket body extending from the bracket base, an archwire slot cut in the front surface of said body, a ligature undercut extending completely around the periphery of the front surface of said body, and a smooth and convex surface extending from said ligature undercut to said archwire slot.
The invention will be readily appreciated by refer-ence to the detailed description when considered in conjunc-tion with the accompanying drawings in which like reference numerals designate like parts throughout the figures and wherein:
'' ' ' - 3a -~ .
Figure I is a perspective view of a prior art plastic orthodontic bracket;
Figure II is a front view of a plastic orthodontic bracket constructed according to the invention;
Figure III is a side view of a plastic orthoaontic bracket constructed according to the invention; and Figure IV is a top view of a plastic orthodontic bracket constructed according to the invention.
Detailed Description of the Invention Referring to figure I, a typical prior art plastlc orthodontic bracket 10 is shown therein. The bracket 10 is comprised of a base 12 and a body 14. Archwire slot 16 is cut horizontally through the center of the bracket. The upper and lower surfaces 18 and 20 axe of equal width. The bracket 10 may either be cemented to a metal band which encircles a tooth to provide a strong bond therewith or cemented directly to a tooth. As may be seen from inspection of figure 1, the top and bottom surfaces 18 and 20 of bracket 10 each have a substantial surface' area which is contacted by`food or other teeth during mastication and occlusion. This substantial surface area causes the body of the bracket 14 to be subjected to considerable force during mastication or occlusion with the attendant likelihood of stress fatigue in the plastic body 14 of the bracket. A ligature undercut 22 is provided parti-ally around the periphery of the bracket body 14. Ligature undercut 22 is cut so deep that a small gauge ligature wire or adhesive band would not substantially fill the ligature undercut 22. The deep ligature design concept substantially lessens the material bulk distribution between archwire slot 30 16 and ligature undercut 22 with the attendant likelihood of an increase in stress fatigue between these points. Reference numerals 24, 26, and 28 identify sharp edges defined by the 104B5g5 meeting of relatively flat surfaces. Each of these sharp edges represents an internal stress point of the plastic bracket which may fatigue under continued stress.
Referring to figures II-IV, a plastic orthodontic bracket which is constructed according to the present in-vention is shown as it would be attached to a maxillary lateral tooth. Bracket lO has a horizontally disposed arch-wire slot 30 cut in the front surface of the bracket body 32. The rear surface of base 34 of bracket lO is concavely contoured mesio-distally and gingivo-incisally to conform to the labial contour of the tooth to which the bracket is adapted to be attached. The base contour of brackets which are used on different types of teeth are chosen to conform to the different labial contours of those teeth to which the bracket is to be attached. The preferred bracket shape is quasi triangular with top section 36 comprising the base of a triangle while bottom section 38 f~rms the apical section of a triangle. However, other tapered geometrical shapes could also be used. Vertical slot 40 is provided to allow an archwire to be tied in utilizing a mesial or distal rotational force. The preferred position is over the clini-cal crown of the tooth. Ligature undercut 42 is purposely cut shallow enough to be substantially filled by a small gauge ligature wire or elastic ring. Preferably, the depth of ligature undercut 42 is approximately .015 mm or less.
This shallow undercut provides maximum material bulk between the ligature undercut 42 and archwire slot 30 to lessen the chance of plastic fatigue between these points. The ligature undercut 42 is smooth and concave in shape. Extending from ligature undercut 42 over the front surface of the bracket body 32, all surfaces are smooth and convex except the arch-wire and vertical slots 30 and 40 to lessen internal stress 1.0~3595 which normally occurs in plastic brackets which have sharp corners. The base 34 of the bracket 10 is extended, as identified by reference numeral 44, from the ligatur:e ~nder-cut 42 a distance sufficient to prevent the adhesive used for attaching the back surface of the base 34 to the labial surface of the tooth from occluding the ligature undercut 42. The extension 44 is preferably 0.5 mm long. The lip section 46 of the bracket body 32 located next to the liga-ture undercut 42 is relie,ved incisally and gingivally to the archwire to facilitate easy placement of the ligature.
. .
Referring specifically to Figure III, it may be seen that archwire slot 30 is not perpendicular to the plane of the base 34. The archwire sl~ot forms an acute angle which is measured between a perpendicular line from the base of the archwire slot and the base of the bracket which is parallQl to the labial surface of the tooth. This acute angulation produces a built in torque in the bracket which requires less torque to be placed in the archwire. This configuration produces less destructive wear of the plastic material where it is in contact with the sharp corners of the metal wire.
The following table gives the preferred bracket dimensions and angulations which are to be used with different types of teeth.
' ~, ~043595 p, I_ p, ~ It ~q o u E .4 ~ ~ ~
~ O
maxillary central 5.8 6.3 0 21 0.5 maxillary lateral 4.8 5.3 0 14 1.0 maxillary cuspid 5.8 6.3 + 7 0.5 mandibular central 4.8 5.3 0 17 1.0 mandibular lateral 4.3 6.3 0 17 1.0 mandibular cuspid 5.8 6.3 + 4 0.5 To use the bracket, base 34 is cemented to the labial sur-face of the tooth so that the narrow apex section 38 of the bracket body is positioned closest to the incisal edge of a tooth to which the bracket base is attached. This config-uration minimizes the forces applied to the bracket body during mastication and occlusion. While many types of dental adhesives may be used to cement the bracket directly to a tooth, the preferred type of adheslve is disclosed in United States patent application 386,416 filed August 7, 1973.
The preferred type of plastic used in constructing the bracket is chosen from the polycarbonate family. It has the following physical properties: If a filled poly-carbonate is chosen, the shear streng*h should range from 10,000 to 16,000 p.s.i. Deformation at 70 F under a 4000 psi load is less than .1%. If an unfilled polycarbonate is chosen, ~043595 the shear strength should range from 6000 to 8500 psi.
Deformation at 70F under a 4000 psi load is from .1 to .3~.
It should be understood that the foregoing disclosure relates to only a preferred embodiment of the invention and that it is intended to cover all changes and modifications which do not constitute departures from the spirit and scope of the invention.
Claims (8)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A plastic orthodontic bracket comprising a base which is adapted to be attached to the labial surface of a tooth between the gingival and the incisal sections and a single quasi-triangular shaped bracket body extending from the bracket base, an archwire slot cut in the front surface of said body, a ligature undercut extending com-pletely around the periphery of the front surface of said body, and a smooth and convex surface extending from said ligature undercut to said archwire slot.
2. An orthodontic bracket as recited in claim 1 wherein said plastic is a filled polycarbonate having the following physical properties:
shear strength ranging from 10,000 to 16,000 p.s.i.
and deformation at 70°F under a 4,000 p.s.i. load being less than 0.1%.
shear strength ranging from 10,000 to 16,000 p.s.i.
and deformation at 70°F under a 4,000 p.s.i. load being less than 0.1%.
3. An orthodontic bracket as recited in claim 1 where-in said plastic is an unfilled polycarbonate having the following physical properties:
shear strength ranging from 6,000 to 8,500 p.s.i.
and deformation at 70°F under 4,000 p.s.i. load being from 0.1% to 0.3%.
shear strength ranging from 6,000 to 8,500 p.s.i.
and deformation at 70°F under 4,000 p.s.i. load being from 0.1% to 0.3%.
4. A plastic orthodontic bracket as recited in claim 1 further comprising means cut in the front surface of said bracket body for use in applying mesial or dital rotational forces to a tooth to which the bracket is attached.
5. An orthodontic bracket as recited in claim 4 wherein said means comprises a slot cut in the front surface of said bracket body, said slot being perpendicular to said archwire slot.
6. An orthodontic bracket as recited in claim 1 wherein said ligature undercut is smooth and concave and has a maximum depth of 0.015mm or less.
7. An orthodontic bracket as defined in claim 3 wherein said base portion of said bracket extends away from the ligature undercut a distance sufficient to prevent adhesive used for attaching the base of the bracket to the labial surface of the tooth from occluding the ligature undercut.
8. An orthodontic bracket as recited in claim 5 wherein the base is extended away from the ligature under-cut at least for 0.015mm.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US467675A US3922787A (en) | 1974-05-07 | 1974-05-07 | Plastic orthodontic bracket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1043595A true CA1043595A (en) | 1978-12-05 |
Family
ID=23856668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA226,217A Expired CA1043595A (en) | 1974-05-07 | 1975-05-05 | Plastic orthodontic bracket |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3922787A (en) |
| JP (1) | JPS5223513B2 (en) |
| CA (1) | CA1043595A (en) |
| CH (1) | CH603146A5 (en) |
| DE (1) | DE2520191A1 (en) |
| FR (1) | FR2269916B1 (en) |
| GB (1) | GB1506772A (en) |
| ZA (1) | ZA752627B (en) |
Families Citing this family (52)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH613110A5 (en) * | 1976-05-20 | 1979-09-14 | Foerster Bernhard Fa | |
| US4386908A (en) * | 1976-11-15 | 1983-06-07 | Kurz Craven H | Lingual orthodontic appliance system for the mandibular arch |
| US4198753A (en) * | 1977-03-26 | 1980-04-22 | Firma Bernhard Forster | Dental fixing element |
| US4216583A (en) * | 1978-08-03 | 1980-08-12 | Zulauf Inc. | Orthodontic appliance |
| US4878840B1 (en) * | 1978-08-03 | 1995-06-13 | Class One Orthodontics Inc | Orthodontic appliance |
| US4322206A (en) * | 1978-08-03 | 1982-03-30 | Zulauf Inc. | Orthodontic appliance |
| US4337037A (en) * | 1980-02-11 | 1982-06-29 | Kurz Craven H | Fixed lingual orthodontic appliance for the maxillary arch |
| US4669981A (en) * | 1982-09-20 | 1987-06-02 | Kurz Craven H | Lingual orthodontic appliance system |
| FR2537866A1 (en) * | 1982-12-16 | 1984-06-22 | Frindel Francois | Monobloc or single-attachment orthodontic attachment |
| US4470809A (en) * | 1983-06-06 | 1984-09-11 | Klepacki Frank H | Orthodontic appliance |
| JPS60124907U (en) * | 1984-02-02 | 1985-08-23 | 根津 浩 | orthodontic brackets |
| US4597739A (en) * | 1985-05-21 | 1986-07-01 | Farel Rosenberg | Tow element bracket system for true straight wire orthodontics |
| US4674978A (en) * | 1986-06-04 | 1987-06-23 | Raul Acevedo | Orthodontic appliance |
| US4819316A (en) * | 1987-07-29 | 1989-04-11 | Rmo, Inc. | Method of making a pre-adjusted orthodontic bracket assembly |
| US4799882A (en) * | 1987-11-17 | 1989-01-24 | Tp Orthodontics, Inc. | Edgewise bracket |
| US5018259A (en) * | 1988-09-21 | 1991-05-28 | Wildman Alexander J | Method of design and manufacture of laminated orthodontic brackets |
| US5022854A (en) * | 1988-12-16 | 1991-06-11 | Ortho Organizers | Orthodontic bracket |
| US5032080A (en) * | 1989-04-12 | 1991-07-16 | Scandinavian Bioortodontic Ab | Orthodontic appliance bracket and arch |
| JPH03176043A (en) * | 1989-12-05 | 1991-07-31 | Hajime Suyama | Bracket for rectification of dental arch |
| US5067897A (en) * | 1990-04-24 | 1991-11-26 | American Orthodontics Corporation | Twin tie wing bracket |
| US5254002B1 (en) * | 1991-04-08 | 2000-01-11 | Ormco Corp | Orthodontic plastic bracket |
| DE4118248C2 (en) * | 1991-06-04 | 1998-09-24 | Foerster Bernhard Gmbh | Orthodontic device |
| US5302116A (en) * | 1992-03-20 | 1994-04-12 | Viazis Anthony D | Orthodontic bracket |
| US5575644A (en) * | 1993-03-11 | 1996-11-19 | American Orthodontics | Orthodontic appliance |
| US5908293A (en) * | 1994-03-07 | 1999-06-01 | Voudouris; John C. | Orthodontic bracket |
| JP3364728B2 (en) * | 1994-04-13 | 2003-01-08 | トミー株式会社 | Orthodontic bracket |
| US5618174A (en) * | 1994-05-11 | 1997-04-08 | Mors; Wayne A. | Orthodontic bracket and system |
| US5597302A (en) * | 1994-10-14 | 1997-01-28 | Minnesota Mining And Manufacturing Company | Aesthetic plastic orthodontic bracket with load bearing framework |
| US5558516A (en) | 1994-10-14 | 1996-09-24 | Minnesota Mining And Manufacturing Company | Pretreated plastic dental appliances and methods |
| US5607301A (en) * | 1994-11-01 | 1997-03-04 | Lancer Orthodontics | Orthodontic bracket and method of mounting |
| JP3621737B2 (en) * | 1995-02-17 | 2005-02-16 | トミー株式会社 | Orthodontic bracket |
| US5746592A (en) * | 1996-09-05 | 1998-05-05 | Rmo, Inc. | Edgewise orthodontic bracket with tie wing relief for enhancing ligature removal |
| US5769634A (en) * | 1997-06-02 | 1998-06-23 | Choi; John | Dental articulator |
| US6799966B1 (en) | 1999-03-04 | 2004-10-05 | 3M Innovative Properties Company | Fluoropolymeric orthodontic article |
| US6361314B1 (en) * | 2000-04-28 | 2002-03-26 | American Orthodontics | Orthodontic bracket |
| ES2174735B1 (en) * | 2000-11-30 | 2004-11-16 | Jose Duran Von Arx | CORRECTION DEVICE FOR ORTHODONTICS. |
| US6733285B2 (en) * | 2001-12-14 | 2004-05-11 | 3M Innovative Properties Company | Orthodontic appliance with lingual retaining groove |
| US6776614B2 (en) * | 2002-02-13 | 2004-08-17 | Lingualcare, Inc. | Modular system for customized orthodontic appliances |
| US6928733B2 (en) | 2002-11-06 | 2005-08-16 | Lingualcare, Inc. | Method and system for customizing an orthodontic archwire |
| DE10300010B4 (en) * | 2003-01-02 | 2007-08-09 | Fricke, Clemens, Dr. | Brackets and a method for their preparation |
| US7318302B2 (en) * | 2003-07-10 | 2008-01-15 | Opperman Investments, Ltd. | Equipment support for a metal building |
| US7140875B2 (en) * | 2004-02-03 | 2006-11-28 | 3M Innovative Properties Company | Orthodontic bracket with reinforced tiewings |
| US20060008761A1 (en) * | 2004-07-12 | 2006-01-12 | Allred Peter M | Dental appliances having separate performance and bonding regions |
| US7240528B2 (en) | 2004-11-22 | 2007-07-10 | Lingualcare, Inc. | Method and device for shaping an orthodontic archwire |
| DE602005013804D1 (en) * | 2005-12-09 | 2009-05-20 | Bernard Contencin | Orthodontic dental bracket for orthodontic treatment. |
| US7751925B2 (en) * | 2006-01-27 | 2010-07-06 | 3M Innovative Properties Company | System to manufacture custom orthodontic appliances, program product, and related methods |
| USD660435S1 (en) | 2011-05-13 | 2012-05-22 | Rmo, Inc. | Orthodontic bracket |
| USD660968S1 (en) | 2011-05-13 | 2012-05-29 | Rmo, Inc. | Orthodontic bracket |
| USD660436S1 (en) | 2011-05-13 | 2012-05-22 | Rmo, Inc. | Orthodontic bracket |
| USD726318S1 (en) | 2013-01-17 | 2015-04-07 | Rmo, Inc. | Dental instrument for a self-ligating orthodontic clip |
| USD721811S1 (en) | 2013-10-29 | 2015-01-27 | Rmo, Inc. | Orthodontic bracket |
| US11564778B2 (en) * | 2018-03-07 | 2023-01-31 | TH!NK Innovations, LLC | Orthodontic elastic attachments for use with dental aligners |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1467789A (en) * | 1922-09-20 | 1923-09-11 | Edward M Griffin | Orthodontist's locking device |
| US2368851A (en) * | 1943-04-24 | 1945-02-06 | Jacob E Laskin | Orthodontic bracket |
| US3303565A (en) * | 1964-04-09 | 1967-02-14 | George V Newman | Orthodontic brackets |
| US3423833A (en) * | 1967-08-15 | 1969-01-28 | Lawrence Pearlman | Adjustable orthodontic device |
| DE2022730A1 (en) * | 1969-06-05 | 1970-12-10 | Ortho Internat Services Inc | Edgewise bracket lock for orthodortical - use |
-
1974
- 1974-05-07 US US467675A patent/US3922787A/en not_active Expired - Lifetime
-
1975
- 1975-04-09 GB GB14506/75A patent/GB1506772A/en not_active Expired
- 1975-04-23 ZA ZA00752627A patent/ZA752627B/en unknown
- 1975-05-01 CH CH560975A patent/CH603146A5/xx not_active IP Right Cessation
- 1975-05-05 CA CA226,217A patent/CA1043595A/en not_active Expired
- 1975-05-06 DE DE19752520191 patent/DE2520191A1/en not_active Withdrawn
- 1975-05-06 JP JP50054171A patent/JPS5223513B2/ja not_active Expired
- 1975-05-06 FR FR7514081A patent/FR2269916B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2520191A1 (en) | 1975-11-27 |
| FR2269916B1 (en) | 1982-04-09 |
| JPS5223513B2 (en) | 1977-06-24 |
| GB1506772A (en) | 1978-04-12 |
| CH603146A5 (en) | 1978-08-15 |
| FR2269916A1 (en) | 1975-12-05 |
| AU8047975A (en) | 1976-10-28 |
| US3922787A (en) | 1975-12-02 |
| ZA752627B (en) | 1976-03-31 |
| JPS515895A (en) | 1976-01-19 |
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