CA1220654A - Orthodontic appliance - Google Patents
Orthodontic applianceInfo
- Publication number
- CA1220654A CA1220654A CA000455840A CA455840A CA1220654A CA 1220654 A CA1220654 A CA 1220654A CA 000455840 A CA000455840 A CA 000455840A CA 455840 A CA455840 A CA 455840A CA 1220654 A CA1220654 A CA 1220654A
- Authority
- CA
- Canada
- Prior art keywords
- slot
- tooth
- shell
- archwire
- apertures
- 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
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000004033 plastic Substances 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000002184 metal Substances 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 12
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002991 molded plastic Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000000472 traumatic effect Effects 0.000 description 2
- 241000905957 Channa melasoma Species 0.000 description 1
- AYFVYJQAPQTCCC-GBXIJSLDSA-N L-threonine Chemical compound C[C@@H](O)[C@H](N)C(O)=O AYFVYJQAPQTCCC-GBXIJSLDSA-N 0.000 description 1
- 208000034693 Laceration Diseases 0.000 description 1
- JCYZMTMYPZHVBF-UHFFFAOYSA-N Melarsoprol Chemical compound NC1=NC(N)=NC(NC=2C=CC(=CC=2)[As]2SC(CO)CS2)=N1 JCYZMTMYPZHVBF-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000001055 chewing effect Effects 0.000 description 1
- ZPUCINDJVBIVPJ-LJISPDSOSA-N cocaine Chemical compound O([C@H]1C[C@@H]2CC[C@@H](N2C)[C@H]1C(=O)OC)C(=O)C1=CC=CC=C1 ZPUCINDJVBIVPJ-LJISPDSOSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 210000004283 incisor Anatomy 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 230000018984 mastication Effects 0.000 description 1
- 238000010077 mastication Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- BALXUFOVQVENIU-KXNXZCPBSA-N pseudoephedrine hydrochloride Chemical compound [H+].[Cl-].CN[C@@H](C)[C@@H](O)C1=CC=CC=C1 BALXUFOVQVENIU-KXNXZCPBSA-N 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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
Abstract
Abstract of the Disclosure An aesthetic orthodonic appliance comprised of a shell molded from a tooth colored material. The rear surface of the appliance substantially conforms to the front surface of the tooth and is bonded thereto. The front surface of the shell generally follows the contour of the tooth surface and aesthetically blends to meet the tooth surface. The shell has a horizontal slot for accommodating an archwire and two tubular apertures through the shell to receive a ligation wire.
Description
~L;2 2~5~
Title O~thodontic Appliance y Field of Invention and Prior Art The present invention relates to orthodonic appliances, such as those permitting attachment of a brace in the form of a base wire or archwire thereto.
The placement of orthodonic braces on permanent teeth is more than fifty years old. The principal method of attaching the brace to the tooth wa~ by use of a thin, flat, metal ba~d that f~rmed a ring around the entire tooth. Walded to the front sur~ace o the band was a ~ormed metal bracket.
, ~he metals that were originally used for the bands and the brackets were various alloy5 of gold. In more recent years, gold was replaced by other alloys/ chiefly stainles5 steel~ All the various types of metal bands and brackets varied in color from light gold to gray steel - none was compatibIe with the color of natural teeth. The bands and brackets were attached to the teeth by cementing material, primarily oxyphosph~te cement.
Later, a method of bonding orthodonic braces directly to the front surface of the teeth was deve]oped. This bcndiny process eliminated the need for the band. Initally, all the ~onding was done with metal brackets. The metal was still ~ray in color.
The metal brackets were made of cast or milled materia~ and had very precise ed~es and some kind of double hook called a wing, compare for instance U. S. patent No. 4,216,583, which is used to ligate or hold an archwire in place. The wing projections can be irritating to the lips. In traumatic situations, severe laceration of the lips and cheeks can occur.
Soon r several plastic brackets appeared on the marXet. They were primarily sha~ed like the metal br~ckets, see or exampIe ~2Zat~
U. S. patent No. 4,229,569, but they were eseentiaLly clear an~
transparent in color. The clear plastic eliminated the metallic appearance of the former brackets.
The original plastic brackets duplicated the size, shape and form of the metal brackets ~U. S. patent No. 4,299,569). Due to the great reduction in strength o the plastic as compared to the metal, a high degree of fracture of the plastic brackets occurred.
In order to reduce the ~reakage factor, the plastic brackets were changed by increasing their overall bulk. The net result was a plastic block or pluq o~ material which was far from compatible with normal tooth contour. Numerous designs have been proposed for p~astic orthodonic brackets, bu~ most of the brackets have allen into disuse. There are only thre~ o~ four manufacturers ~hat are of~erlng a pla~tic bracket, while there are more than thlrt~ manu~acturer~ ofering the metal brackets.
An attempt to improve earlier constructions of plastic brackets has been made in the design shown in U. S. ~atent No.
Title O~thodontic Appliance y Field of Invention and Prior Art The present invention relates to orthodonic appliances, such as those permitting attachment of a brace in the form of a base wire or archwire thereto.
The placement of orthodonic braces on permanent teeth is more than fifty years old. The principal method of attaching the brace to the tooth wa~ by use of a thin, flat, metal ba~d that f~rmed a ring around the entire tooth. Walded to the front sur~ace o the band was a ~ormed metal bracket.
, ~he metals that were originally used for the bands and the brackets were various alloy5 of gold. In more recent years, gold was replaced by other alloys/ chiefly stainles5 steel~ All the various types of metal bands and brackets varied in color from light gold to gray steel - none was compatibIe with the color of natural teeth. The bands and brackets were attached to the teeth by cementing material, primarily oxyphosph~te cement.
Later, a method of bonding orthodonic braces directly to the front surface of the teeth was deve]oped. This bcndiny process eliminated the need for the band. Initally, all the ~onding was done with metal brackets. The metal was still ~ray in color.
The metal brackets were made of cast or milled materia~ and had very precise ed~es and some kind of double hook called a wing, compare for instance U. S. patent No. 4,216,583, which is used to ligate or hold an archwire in place. The wing projections can be irritating to the lips. In traumatic situations, severe laceration of the lips and cheeks can occur.
Soon r several plastic brackets appeared on the marXet. They were primarily sha~ed like the metal br~ckets, see or exampIe ~2Zat~
U. S. patent No. 4,229,569, but they were eseentiaLly clear an~
transparent in color. The clear plastic eliminated the metallic appearance of the former brackets.
The original plastic brackets duplicated the size, shape and form of the metal brackets ~U. S. patent No. 4,299,569). Due to the great reduction in strength o the plastic as compared to the metal, a high degree of fracture of the plastic brackets occurred.
In order to reduce the ~reakage factor, the plastic brackets were changed by increasing their overall bulk. The net result was a plastic block or pluq o~ material which was far from compatible with normal tooth contour. Numerous designs have been proposed for p~astic orthodonic brackets, bu~ most of the brackets have allen into disuse. There are only thre~ o~ four manufacturers ~hat are of~erlng a pla~tic bracket, while there are more than thlrt~ manu~acturer~ ofering the metal brackets.
An attempt to improve earlier constructions of plastic brackets has been made in the design shown in U. S. ~atent No.
2,972,787. In this proposal, a somewhat ~ore smoothly-shaped bracket body is used having the form.of a triangle with one corner pointing in the directiol~ of the biting edge of ~he too_h. A horizontal archwire slot is provided in the front of this triangular body and, periphexally around the entire base o~ the triangular bracket, an undercut or groove accom~odating the ligation wire. This peripheral groove at the base, however, weakens the bracket so that the latter has to be given a ~reater thickness or cross section to provide the necessary amount of strength. In particular, the more space is allowed for the undercut to properly receive the ligation wire, the more the bulk of the bracket ~djacent the biting edge of the tooth is increased. Xn the known design, the bracket is given the a~ove-mentioned triangular shape to keep the greater shear forces due to the - ~reater cross-sectional dimension from prying the bracket loose in ~ZZIDG~
response to mastication foxces.
Ob ects and Summar of the Invention -- Y
It is an object oE the present invention to provide a safe orthodonic appliance, preferably of molded plastic material which, having all edges and corners removed, closely duplicates the front surface of the tooth and thereby becomes comparable in shape to a dental cap.
It is a specific object of the invention to provide a contoured bracket which avoids the above-mentioned shortcomings of the design disclosed in U.S. patent No. 3,922,787.
Briefly, these and other objects are met, according to the invention, by an orthodontic appliance comprising a shell havin~ a rear surface substantially conforming to the front ~ace of a tooth for bondin~ said shell thereto, and having a front surface generally following the contour of, and blending into, the front face of the tooth, said front surface includiny a vertically extending central reinforcement portion having formed therein a substantially horizontally extending slot for accommodating an archwire and also two tubular apertures extending therethrough in substantially parallel relationship to said slot for receiving therein ligation wire means inserted laterally into said apertures for engagement of said archwire, said apertures being provided in said central reinforcement portion in locations rearwardly of and adjacent to said slot such that said ligation wire means exert a substantial force on said archwire in a direction of the bottom of said slot, thereby to hold the archwire in place in said slot.
In the embodiment of the invention disclosed hereafter, the shell is made from molded plastic material, with the color of the material closely matching the color of the tooth, thereby to further enhance the appearance of the appliance.
The unique design employing the two transverse tubular ~22~654 apertures results in a contour that is much thinner and more closely resembles the front surface of the tooth than was possible in the case of the prior art designs. This result is further enhanced by the fact that the two tubular apertures conceal the greater portion of the tie wire means and protect the mouth of the /
/
.. . . _ _ - 3a -~ 22~6~
patien~ thereagainst. The shell according to the invention, provides for a substantial reduction in the shear forces on the brack~t during chewing. This reduction of shear forces, moreover, reduces the possihility of failure or fracture of the bracket or of the cementing or bonding medium. The unique design of the contoured bracket of the invention also results in less irritation to the lips or cheeks. The absence of sharp edges virtually eliminates the possibility of traumatic per~oration of the lip or cheek in case of an acciaental b}ow. In addition, this unique contoured bracket or shell reduces crevices or areas where food might become en~rapped, thereb~ allowing greater oral hygiene.
Brief Description of the Drawing ;
A preferred embodiment of the invention will be aescribed hereafter with reference to the accompanying drawing in which:
Fig. 1 is a frontal view of the orthodonic appliance according to the invention applied to the front of a tooth.
Fig. 2 is a side view of the o~thodonic appliance as applied to t~e tooth.
~ ig. 3 i, an end view of t.he orthodonic appliance as applied to the tooth and as viewed from the biting edge thereof.
Fig. 4 is a perspective view, from t~e top right, of the orthodonic appliance a5 applied to the tooth, with the archwire and ligation wire in place.
Detailed Description of the Pxeferred Em~odiment In Fig. 1 of the drawing, the bracket or shell according to the invention has been designated as 2. Shell 2 is of molded plastic material, such as a polycarbonate plastic. The molded shell has a rear surface substantially conorming to tne contour 12;;:1DEi5~
of the front face of tooth 1 of the patient, the tooth illustrated in the drawing being an upper incisor, by way of example. The rear surface of shell 2 is bonded to the front face of the tooth by a suitable, com~ercially-available bondins~ material, The color of the plastic material of the bracket or shell 2 is chosen so that it closely matches the natural color of tooth 1. Thus, the appliance according to the invention has a pleasant and inconspicuous appearance. The patient's gum is designed as 8 in the drawing.
The front sur~ace of shell 2 generally follows the contour of the tooth and, throughout its periphery, blends into the surface of tooth 1, but it end~ at a slight distance from the edge of the toot~, thereby lea~ing onl~ a ~arrow peripheral portion 3 o~ the tooth uncov~red.
~ he front sur~ace of shell 2 includes a vertically-extending central rei~forcement portion 4 to provi~e the necessary thickness for the fonma~ion therein of archwire slot 6 ana two tubular apertures 7, ~ ~s shown in the drawing,,reinforcement portion ~ blends smoothly into the remainder of the front face of the shell. S}ot 6 is of rectangular cross section and it accom~odates a base wire or archwire 10 which, as shown in Fig. 4, is of circular cross section. Archwire slot 6 may be beveled slightly to remove any sharp edges and allow for easy insertion of ~he archwire. The two tubular apertures 7 extend through reinforcement portion 4 in substantially parallel relationship to archwire slot 6. The tubular apertures 7 are designed to receive the leg portions of the generally U-shaped ligation wire 9 which, as shown in Fig. 4r is inserted laterally through apertures 7. The ends of tubular aperture 7 may be slightly countersunk to relieve stresses upon the ligation wire 9.
In the preferre~ embodiment, the two tubular apertures 7 through the reinforcement portion 4 are located above and below, respectively, of archwire slot 6 and slightly set back with respect ~ 2~65i~
to the bottom of this slot. With this arran~ement, the bite end, that is the closed end 11, of the U-shaped ligation wire can be looped around the right end, as viewed in ~ig. 4, of the archwire, the leg portions of the ligation wire can then be laterally inserted into the respective aperture~ 7 from that end, and the open endsl2 of the ligation wire, now protruding from that (left) end, bent upwards and twist-tied around this left end of the archwire~ In this manner, both ends of arc~wire 10 are urged a~ainst the bottom of slot 6 with the twist-tied ends 12 o~ the ligation wire 9 providing ~he necessary urging force~ Archwire 10 is thus safely "seated" in slot 6. U-shapea ligation wire 9, which when stretched out, may have an overall length o~ 2 to 2-1/2 inches, preferably is made of flexible, non-tempered stainless steel, this being ~he usual material for orthodonic tie wires.
A pre~erred diameter for the ligation wire is .009 inch and fo~ ~he tubular apertures 7 accommodating this wire about .01~ inch.
In the preferred em~odiment, shell 2 is concavely cha~fered on the sides 5 of reinforcement portion 4 to facilitate removal of shell from the tooth upon completion of the orthodonic treatment, by means of a tweezer-like plier. The chamfered sides 5 thus allow the vertically-extending central reinfo_cement portion 4 to be grasped by this tool. The necessity of contac~ing the enamel of the tooth at its periphery for the purpose of breaking the bond is thereby avoided.
The archwire slot preferabl~ is .025 to .028 inch aeep and .018 to 0. 22 inch wide. Moreover, the archwire itself, rather than being round as shown herein, may have a rectangular or square cross section.
In conclusion it may be mentioned that slot 6 and tubular apertures 7 have been assumed herein to be machined into the shell after the molding thereof. However, slot 6 and, if specia molds are used, apertures 7 could, alternatively, be integrall~
molded into the shell. As indicated above, shell 2 could also be ~ 2~16~i~
made of other than plastic material, for instance cast metal could be used. It should be understood that the foregoing disclosure relates to only the preferred embodiment of the invention, and the claims are intended to cover all changes and modifications which do not constitute departures from the spirit and scope of the invention.
response to mastication foxces.
Ob ects and Summar of the Invention -- Y
It is an object oE the present invention to provide a safe orthodonic appliance, preferably of molded plastic material which, having all edges and corners removed, closely duplicates the front surface of the tooth and thereby becomes comparable in shape to a dental cap.
It is a specific object of the invention to provide a contoured bracket which avoids the above-mentioned shortcomings of the design disclosed in U.S. patent No. 3,922,787.
Briefly, these and other objects are met, according to the invention, by an orthodontic appliance comprising a shell havin~ a rear surface substantially conforming to the front ~ace of a tooth for bondin~ said shell thereto, and having a front surface generally following the contour of, and blending into, the front face of the tooth, said front surface includiny a vertically extending central reinforcement portion having formed therein a substantially horizontally extending slot for accommodating an archwire and also two tubular apertures extending therethrough in substantially parallel relationship to said slot for receiving therein ligation wire means inserted laterally into said apertures for engagement of said archwire, said apertures being provided in said central reinforcement portion in locations rearwardly of and adjacent to said slot such that said ligation wire means exert a substantial force on said archwire in a direction of the bottom of said slot, thereby to hold the archwire in place in said slot.
In the embodiment of the invention disclosed hereafter, the shell is made from molded plastic material, with the color of the material closely matching the color of the tooth, thereby to further enhance the appearance of the appliance.
The unique design employing the two transverse tubular ~22~654 apertures results in a contour that is much thinner and more closely resembles the front surface of the tooth than was possible in the case of the prior art designs. This result is further enhanced by the fact that the two tubular apertures conceal the greater portion of the tie wire means and protect the mouth of the /
/
.. . . _ _ - 3a -~ 22~6~
patien~ thereagainst. The shell according to the invention, provides for a substantial reduction in the shear forces on the brack~t during chewing. This reduction of shear forces, moreover, reduces the possihility of failure or fracture of the bracket or of the cementing or bonding medium. The unique design of the contoured bracket of the invention also results in less irritation to the lips or cheeks. The absence of sharp edges virtually eliminates the possibility of traumatic per~oration of the lip or cheek in case of an acciaental b}ow. In addition, this unique contoured bracket or shell reduces crevices or areas where food might become en~rapped, thereb~ allowing greater oral hygiene.
Brief Description of the Drawing ;
A preferred embodiment of the invention will be aescribed hereafter with reference to the accompanying drawing in which:
Fig. 1 is a frontal view of the orthodonic appliance according to the invention applied to the front of a tooth.
Fig. 2 is a side view of the o~thodonic appliance as applied to t~e tooth.
~ ig. 3 i, an end view of t.he orthodonic appliance as applied to the tooth and as viewed from the biting edge thereof.
Fig. 4 is a perspective view, from t~e top right, of the orthodonic appliance a5 applied to the tooth, with the archwire and ligation wire in place.
Detailed Description of the Pxeferred Em~odiment In Fig. 1 of the drawing, the bracket or shell according to the invention has been designated as 2. Shell 2 is of molded plastic material, such as a polycarbonate plastic. The molded shell has a rear surface substantially conorming to tne contour 12;;:1DEi5~
of the front face of tooth 1 of the patient, the tooth illustrated in the drawing being an upper incisor, by way of example. The rear surface of shell 2 is bonded to the front face of the tooth by a suitable, com~ercially-available bondins~ material, The color of the plastic material of the bracket or shell 2 is chosen so that it closely matches the natural color of tooth 1. Thus, the appliance according to the invention has a pleasant and inconspicuous appearance. The patient's gum is designed as 8 in the drawing.
The front sur~ace of shell 2 generally follows the contour of the tooth and, throughout its periphery, blends into the surface of tooth 1, but it end~ at a slight distance from the edge of the toot~, thereby lea~ing onl~ a ~arrow peripheral portion 3 o~ the tooth uncov~red.
~ he front sur~ace of shell 2 includes a vertically-extending central rei~forcement portion 4 to provi~e the necessary thickness for the fonma~ion therein of archwire slot 6 ana two tubular apertures 7, ~ ~s shown in the drawing,,reinforcement portion ~ blends smoothly into the remainder of the front face of the shell. S}ot 6 is of rectangular cross section and it accom~odates a base wire or archwire 10 which, as shown in Fig. 4, is of circular cross section. Archwire slot 6 may be beveled slightly to remove any sharp edges and allow for easy insertion of ~he archwire. The two tubular apertures 7 extend through reinforcement portion 4 in substantially parallel relationship to archwire slot 6. The tubular apertures 7 are designed to receive the leg portions of the generally U-shaped ligation wire 9 which, as shown in Fig. 4r is inserted laterally through apertures 7. The ends of tubular aperture 7 may be slightly countersunk to relieve stresses upon the ligation wire 9.
In the preferre~ embodiment, the two tubular apertures 7 through the reinforcement portion 4 are located above and below, respectively, of archwire slot 6 and slightly set back with respect ~ 2~65i~
to the bottom of this slot. With this arran~ement, the bite end, that is the closed end 11, of the U-shaped ligation wire can be looped around the right end, as viewed in ~ig. 4, of the archwire, the leg portions of the ligation wire can then be laterally inserted into the respective aperture~ 7 from that end, and the open endsl2 of the ligation wire, now protruding from that (left) end, bent upwards and twist-tied around this left end of the archwire~ In this manner, both ends of arc~wire 10 are urged a~ainst the bottom of slot 6 with the twist-tied ends 12 o~ the ligation wire 9 providing ~he necessary urging force~ Archwire 10 is thus safely "seated" in slot 6. U-shapea ligation wire 9, which when stretched out, may have an overall length o~ 2 to 2-1/2 inches, preferably is made of flexible, non-tempered stainless steel, this being ~he usual material for orthodonic tie wires.
A pre~erred diameter for the ligation wire is .009 inch and fo~ ~he tubular apertures 7 accommodating this wire about .01~ inch.
In the preferred em~odiment, shell 2 is concavely cha~fered on the sides 5 of reinforcement portion 4 to facilitate removal of shell from the tooth upon completion of the orthodonic treatment, by means of a tweezer-like plier. The chamfered sides 5 thus allow the vertically-extending central reinfo_cement portion 4 to be grasped by this tool. The necessity of contac~ing the enamel of the tooth at its periphery for the purpose of breaking the bond is thereby avoided.
The archwire slot preferabl~ is .025 to .028 inch aeep and .018 to 0. 22 inch wide. Moreover, the archwire itself, rather than being round as shown herein, may have a rectangular or square cross section.
In conclusion it may be mentioned that slot 6 and tubular apertures 7 have been assumed herein to be machined into the shell after the molding thereof. However, slot 6 and, if specia molds are used, apertures 7 could, alternatively, be integrall~
molded into the shell. As indicated above, shell 2 could also be ~ 2~16~i~
made of other than plastic material, for instance cast metal could be used. It should be understood that the foregoing disclosure relates to only the preferred embodiment of the invention, and the claims are intended to cover all changes and modifications which do not constitute departures from the spirit and scope of the invention.
Claims (5)
1. An orthodontic appliance comprising a shell having a rear surface substantially conforming to the front face of a tooth for bonding said shell thereto, and having a front surface generally following the contour of, and blending into, the front face of the tooth, said front surface including a vertically extending central reinforcement portion having formed therein a substantially horizontally extending slot for accommodating an archwire and also two tubular apertures extending therethrough in substantially parallel relationship to said slot for receiving therein ligation wire means inserted laterally into said apertures for engagement of said archwire, said apertures being provided in said central reinforcement portion in locations rearwardly of and adjacent to said slot such that said ligation wire means exert a substantial force on said archwire in a direction of the bottom of said slot, thereby to hold the archwire in place in said slot.
2. An orthodontic appliance as claimed in claim 1, wherein said tubular apertures are provided in said reinforcement portion in locations above and below said slot but slightly set back with respect to the bottom of said slot, said tubular apertures being arranged to receive leg portions of a U-shaped ligation wire such that said ligation wire, when inserted around the arch wire and into said apertures at one end and tied around the arch wire at the other end, urges the arch wire against the bottom of said slot.
3. An orthodontic appliance as claimed in claim 1, wherein the front surface of said shell is contoured to end throughout its periphery, at a slight distance from the tooth edges.
4. An orthodontic appliance as claimed in claim 1, wherein the central reinforcement portion, on its two sides is concavely chamfered to facilitate removal of the shell from the tooth.
5. An orthodontic appliance as claimed in claim 1, wherein said shell is molded of plastic, preferably tooth-colored, material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/501,505 | 1983-06-06 | ||
| US06/501,505 US4470809A (en) | 1983-06-06 | 1983-06-06 | Orthodontic appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1220654A true CA1220654A (en) | 1987-04-21 |
Family
ID=23993838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000455840A Expired CA1220654A (en) | 1983-06-06 | 1984-06-05 | Orthodontic appliance |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4470809A (en) |
| EP (1) | EP0128474B1 (en) |
| JP (1) | JPS6034440A (en) |
| CA (1) | CA1220654A (en) |
| DE (1) | DE3469404D1 (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4735569A (en) * | 1986-04-03 | 1988-04-05 | Munk Charles F | Orthodontic appliance and method of preparation thereof |
| US4674978A (en) * | 1986-06-04 | 1987-06-23 | Raul Acevedo | Orthodontic appliance |
| US4915630A (en) * | 1989-05-15 | 1990-04-10 | Honig Gordon C | Dental splint |
| IT1260392B (en) * | 1992-01-17 | 1996-04-05 | Lingual orthodontic apparatus having separate attachment | |
| US5575644A (en) * | 1993-03-11 | 1996-11-19 | American Orthodontics | Orthodontic appliance |
| US5931667A (en) * | 1997-07-14 | 1999-08-03 | Papandreas; Samuel G. | Orthodontic apparatus and method |
| US6364659B1 (en) | 2000-02-23 | 2002-04-02 | 3M Innovative Properties Company | Orthodontic bite opener |
| 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 |
| US7240528B2 (en) * | 2004-11-22 | 2007-07-10 | Lingualcare, Inc. | Method and device for shaping an orthodontic archwire |
| US7751925B2 (en) * | 2006-01-27 | 2010-07-06 | 3M Innovative Properties Company | System to manufacture custom orthodontic appliances, program product, and related methods |
| BRPI1006458A2 (en) * | 2009-03-13 | 2019-09-24 | Ultradent Products Inc | Methods of Manufacturing a Machinable Convertible Orthodontic Bracket |
| US8157562B2 (en) * | 2009-08-05 | 2012-04-17 | Six Month Smiles Inc. | Orthodontic bracket system and method |
| US20110033812A1 (en) * | 2009-08-05 | 2011-02-10 | Six Month Smiles Inc. | Orthodontic bracket system and method |
| CN102462542A (en) * | 2011-03-23 | 2012-05-23 | 张国彬 | Directional interactive drawing buckle of orthodontic treatment balance corrector |
| US11432911B2 (en) | 2014-10-14 | 2022-09-06 | Paul Ouellette | Integrated braces with veneers, crowns, or bridges |
| USD799700S1 (en) * | 2016-11-18 | 2017-10-10 | Jae Hoon Kim | Orthodontic bracket |
| CA3102465A1 (en) | 2018-06-12 | 2019-12-19 | Lightforce Orthodontics, Inc. | Ceramic processing and design for the direct manufacture of customized labial and lingual orthodontic clear aligner attachments |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2125587A (en) * | 1935-10-21 | 1938-08-02 | Richardson Annie | Orthodontia bracket |
| DE1228754B (en) * | 1964-02-20 | 1966-11-17 | Dr Gerhard Mueller | Process for attaching orthodontic or orthodontic appliances and removable dentures using so-called >> attachments << and devices for this |
| US3303565A (en) * | 1964-04-09 | 1967-02-14 | George V Newman | Orthodontic brackets |
| GB1079008A (en) * | 1965-05-11 | 1967-08-09 | Thomas Joseph Provenza | Orthodontic appliance |
| US3464114A (en) * | 1967-09-21 | 1969-09-02 | Allen C Brader | Dental attachment with cooperating extension or socket |
| DE2022730A1 (en) * | 1969-06-05 | 1970-12-10 | Ortho Internat Services Inc | Edgewise bracket lock for orthodortical - use |
| US3922787A (en) * | 1974-05-07 | 1975-12-02 | Kenneth J Fischer | Plastic orthodontic bracket |
| US3964165A (en) * | 1974-05-23 | 1976-06-22 | Stahl Lee W | Elastomeric orthodontic apparatus |
| US3936939A (en) * | 1974-06-28 | 1976-02-10 | Faunce Frank R | Veneer supported orthodontic appliance |
| US4299569A (en) * | 1976-03-08 | 1981-11-10 | Leonard Frantz | Orthodontic bracket for straightening teeth |
| DE2741550C2 (en) * | 1977-09-15 | 1985-04-25 | Scheu-Dental Inhaber Rudolf Scheu, Herstellung und Vertrieb von Dentalbedarf, 5860 Iserlohn | Method and device for the laboratory preparation for the attachment of brackets to teeth to be orthodontically treated |
| US4216583A (en) * | 1978-08-03 | 1980-08-12 | Zulauf Inc. | Orthodontic appliance |
-
1983
- 1983-06-06 US US06/501,505 patent/US4470809A/en not_active Expired - Fee Related
-
1984
- 1984-05-16 JP JP59096700A patent/JPS6034440A/en active Pending
- 1984-06-01 DE DE8484106248T patent/DE3469404D1/en not_active Expired
- 1984-06-01 EP EP84106248A patent/EP0128474B1/en not_active Expired
- 1984-06-05 CA CA000455840A patent/CA1220654A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0128474A1 (en) | 1984-12-19 |
| EP0128474B1 (en) | 1988-02-24 |
| JPS6034440A (en) | 1985-02-22 |
| DE3469404D1 (en) | 1988-03-31 |
| US4470809A (en) | 1984-09-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |