CA2234137A1 - Tooth restoration using fibre-reinforced composite material - Google Patents
Tooth restoration using fibre-reinforced composite material Download PDFInfo
- Publication number
- CA2234137A1 CA2234137A1 CA 2234137 CA2234137A CA2234137A1 CA 2234137 A1 CA2234137 A1 CA 2234137A1 CA 2234137 CA2234137 CA 2234137 CA 2234137 A CA2234137 A CA 2234137A CA 2234137 A1 CA2234137 A1 CA 2234137A1
- Authority
- CA
- Canada
- Prior art keywords
- composite material
- post
- fibre
- root canal
- ceramic
- 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.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/225—Fastening prostheses in the mouth
- A61C13/30—Fastening of peg-teeth in the mouth
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 Prosthetics (AREA)
Abstract
A tooth restoration system for insertion into a tooth upon which root canal therapy has taken place. The system comprises a post, a core and a crown wherein the post is formed from a fibre-reinforced composite material and the core and crown are formed from a ceramic or a polymer/ceramic composite material. The fibre-reinforced composite material is molded to the root canal shape while still in a uncured or partially cured state so that it molds to the root canal. The post is then finally cured and the core and crown built up on the post to form the dental implant. The fibre-reinforced composite material comprises a polymeric matrix and a reinforcing fibre component imbedded within the matrix.
Description
TOOTH RESTORATION USING FIBRE-REINFORCED COMPOSITE MATERIAL
FIELD OF THE INVENTION
The present invention relates to a tooth restoration system for restoring a tooth which has undergone root canal therapy.
BACKGROUND OF THE INVENTION
A human tooth comprises a crown and roots. The crown is the part of the tooth visible above the gumline while the roots are under the gums. The roots anchor the teeth to either the maxillary or mandibular bones. Within the roots are root canals which contain pulp. Pulp is live tissue which consists of nerves and blood vessels.
The pulp may become infected and inflamed as a result of dental caries or physical trauma to the tooth. Endodontics is a branch of dentistry which treats teeth with diseased pulps. Endodontics is commonly referred to as root canal therapy. The goal of root canal therapy is to save the tooth by removing the diseased pulp. The root canal is then cleaned and filled. A crown or cap is typically placed on the tooth to protect the tooth and preserve its functionality.
In the prior art, porcelain fused metal ("PFM") systems are commonly used. In a PFM system, a post and core is fashioned from one of a variety of suitable precious and non-precious metals. The post is made to snugly fit the root canal void and serves to anchor the core and crown. The core is built up onto the post and forms the support for the crown which replaces the injured tooth. The crown is fashioned from porcelain (ceramic) material.
PFM systems enjoy excellent strength due to the metal post and excellent wear resistance due to the porcelain. However, a major drawback to PFM systems is the aesthetic appearance of the completed restoration. The enamel and dentin of a normal human tooth allows light to pass through which determines the natural look of a tooth. The metal post and core used in a PFM system reflects light passing through the artificial crown which results in the restoration looking very unnatural.
A solution to this drawback of PFM systems is to replace the metal post with a ceramic material which simulates the translucency of normal teeth. An example is the CosmoPostTM system available from Ivoclar Vi.vadent, Ivoclar North America Inc. The post in this system is a zirconium oxide based ceramic, resulting in an aesthetically pleasing restoration. However, this system suffers from certain drawbacks. The posts are only available in preformed posts of a certain size and diameter. As a result, the dentist must perform the root canal therapy such that the root canal is the exact fit of the pre-formed post and to do so requires the use of proprietary root canal reamers.
Another solution to the aesthetic. drawback of PFM systems is to use a carbon fibre based material such as the ComposipostTM system available from Biodent of Quebec, Canada. This prior art system shares the same drawback as the CosmoPostTM
system in that the posts are only available in preformed sizes and diameters. Again, special proprietary drills must be used in the canal preparation.
Posts are subject to high stresses once the restoration is complete and therefore the ceramic material used in the CosmoPostTM system and similar systems must be very strong. However, that strength prevents flexibility in fashioning the post.
Other ceramic materials such as commonly available polymer/ceramic composites do not possess enough strength to be suitable material for root canal posts.
Therefore, it would be advantageous to have a tooth restoration system which combines the aesthetic qualities of an all-ceramic root canal restoration system with the strength of a conventional PFM system. It would be further advantageous for such a system
FIELD OF THE INVENTION
The present invention relates to a tooth restoration system for restoring a tooth which has undergone root canal therapy.
BACKGROUND OF THE INVENTION
A human tooth comprises a crown and roots. The crown is the part of the tooth visible above the gumline while the roots are under the gums. The roots anchor the teeth to either the maxillary or mandibular bones. Within the roots are root canals which contain pulp. Pulp is live tissue which consists of nerves and blood vessels.
The pulp may become infected and inflamed as a result of dental caries or physical trauma to the tooth. Endodontics is a branch of dentistry which treats teeth with diseased pulps. Endodontics is commonly referred to as root canal therapy. The goal of root canal therapy is to save the tooth by removing the diseased pulp. The root canal is then cleaned and filled. A crown or cap is typically placed on the tooth to protect the tooth and preserve its functionality.
In the prior art, porcelain fused metal ("PFM") systems are commonly used. In a PFM system, a post and core is fashioned from one of a variety of suitable precious and non-precious metals. The post is made to snugly fit the root canal void and serves to anchor the core and crown. The core is built up onto the post and forms the support for the crown which replaces the injured tooth. The crown is fashioned from porcelain (ceramic) material.
PFM systems enjoy excellent strength due to the metal post and excellent wear resistance due to the porcelain. However, a major drawback to PFM systems is the aesthetic appearance of the completed restoration. The enamel and dentin of a normal human tooth allows light to pass through which determines the natural look of a tooth. The metal post and core used in a PFM system reflects light passing through the artificial crown which results in the restoration looking very unnatural.
A solution to this drawback of PFM systems is to replace the metal post with a ceramic material which simulates the translucency of normal teeth. An example is the CosmoPostTM system available from Ivoclar Vi.vadent, Ivoclar North America Inc. The post in this system is a zirconium oxide based ceramic, resulting in an aesthetically pleasing restoration. However, this system suffers from certain drawbacks. The posts are only available in preformed posts of a certain size and diameter. As a result, the dentist must perform the root canal therapy such that the root canal is the exact fit of the pre-formed post and to do so requires the use of proprietary root canal reamers.
Another solution to the aesthetic. drawback of PFM systems is to use a carbon fibre based material such as the ComposipostTM system available from Biodent of Quebec, Canada. This prior art system shares the same drawback as the CosmoPostTM
system in that the posts are only available in preformed sizes and diameters. Again, special proprietary drills must be used in the canal preparation.
Posts are subject to high stresses once the restoration is complete and therefore the ceramic material used in the CosmoPostTM system and similar systems must be very strong. However, that strength prevents flexibility in fashioning the post.
Other ceramic materials such as commonly available polymer/ceramic composites do not possess enough strength to be suitable material for root canal posts.
Therefore, it would be advantageous to have a tooth restoration system which combines the aesthetic qualities of an all-ceramic root canal restoration system with the strength of a conventional PFM system. It would be further advantageous for such a system
-2-to allow the convenient fabrication of a post which molds itself to the root canal and yet still possesses high structural strength.
SUMMARY OF THE INVENTION
In general terms, the invention in one aspect comprises a tooth restoration system for insertion into a tooth upon which root canal therapy has taken place, said system comprising a post, a core and a crown wherein:
(a) the post is formed from a fibre-reinforced composite material comprising a polymeric matrix and a reinforcing fibre component embedded within the matrix, said post having an upper end and a lower end, said lower end molded to the root canal;
(b) the core is bonded to the upper end of the post and is formed from a ceramic material or a polymer/ceramic composite material; and (c) the crown is bonded to and partially surrounds the core and is formed from a ceramic material or a polymer/ceramic composite material.
Preferably, the fibre-reinforced composite material is uncured or partially cured as it is being formed into the post and is completely cured subsequent to being molded to the root canal.
In another aspect of the invention, the invention comprises a method of preparing a dental implant comprising a post, a core and a crown for restoring a tooth upon which root canal therapy has taken place, the method comprising the steps of:
(a) creating a post from a fibre-reinforced composite material comprising a polymeric matrix and a reinforcing fibre component embedded within the
SUMMARY OF THE INVENTION
In general terms, the invention in one aspect comprises a tooth restoration system for insertion into a tooth upon which root canal therapy has taken place, said system comprising a post, a core and a crown wherein:
(a) the post is formed from a fibre-reinforced composite material comprising a polymeric matrix and a reinforcing fibre component embedded within the matrix, said post having an upper end and a lower end, said lower end molded to the root canal;
(b) the core is bonded to the upper end of the post and is formed from a ceramic material or a polymer/ceramic composite material; and (c) the crown is bonded to and partially surrounds the core and is formed from a ceramic material or a polymer/ceramic composite material.
Preferably, the fibre-reinforced composite material is uncured or partially cured as it is being formed into the post and is completely cured subsequent to being molded to the root canal.
In another aspect of the invention, the invention comprises a method of preparing a dental implant comprising a post, a core and a crown for restoring a tooth upon which root canal therapy has taken place, the method comprising the steps of:
(a) creating a post from a fibre-reinforced composite material comprising a polymeric matrix and a reinforcing fibre component embedded within the
-3-matrix, having an upper end and. a lower end, said lower end molded to the root canal;
(b) building up a core onto the upper end of the post from a ceramic or polymer/ceramic composite material; and (c) forming a crown around the core from a ceramic or polymer/ceramic composite material and shaping the crown to simulate the lost tooth.
Preferably, the fibre-reinforced composite material is uncured or partially cured as it is being formed into the post and is completely cured subsequent to being molded to the root canal.
A development in the field of passive or non-force imparting dental appliances provides the preferred material for the post of the present invention. In US
Patent No.
(b) building up a core onto the upper end of the post from a ceramic or polymer/ceramic composite material; and (c) forming a crown around the core from a ceramic or polymer/ceramic composite material and shaping the crown to simulate the lost tooth.
Preferably, the fibre-reinforced composite material is uncured or partially cured as it is being formed into the post and is completely cured subsequent to being molded to the root canal.
A development in the field of passive or non-force imparting dental appliances provides the preferred material for the post of the present invention. In US
Patent No.
4,894,012 there is described a fibre-reinforced composite material with the appropriate properties for use in this invention.
DETAILED DESCRIPTION OF THE INVENTION
There are several aspects to the successful production of an effective composite material used for the post of the present invention. These include:
(1) the effective wetting of the fibres by the matrix and the associated coupling between the fiber and matrix components;
(2) the provision for an even and uniform distribution of the fibres throughout the matrix material;
(3) the proper fibre orientation within the matrix for the specific characteristics and properties desired;
(4) the elimination of voids or air pockets within the composite material;
and
DETAILED DESCRIPTION OF THE INVENTION
There are several aspects to the successful production of an effective composite material used for the post of the present invention. These include:
(1) the effective wetting of the fibres by the matrix and the associated coupling between the fiber and matrix components;
(2) the provision for an even and uniform distribution of the fibres throughout the matrix material;
(3) the proper fibre orientation within the matrix for the specific characteristics and properties desired;
(4) the elimination of voids or air pockets within the composite material;
and
(5) the proper selection of the appropriate fiber and matrix materials.
Suitable composite materials are commercially available. Jeneric~/Pentron~
Incorporated of Wallingford, CT, USA manufactures and sells FibreKorTM in convenient ready-to-use sizes. Similarly, Ivoclar North America manufactures and sells VectrisTM. Both FibreKorTM and VectrisTM are preferred composite materials for fabricating the post of the present invention. They exhibit a high modulus of elasticity and high strength, matching that of non-precious alloys. They also exhibit translucency which closely matches that of human dental tissue, which is preferred for the present: invention.
The composite material utilized in accordance with the present invention is composed of two essential components, a polymeric matrix and fibres embedded within the matrix. The fibers preferably take the form of long continuous filaments, although these filaments may be as short as 3 to 4 millimeters. Alternatively, shorter fibers of uniform or random lengths might also be employed.
Although a variety of fibers may be employed, the most commonly used fibers are glass, carbon and/or graphite, and polyaramid fibers such as the fibers sold under the trade name "Kevlar". Other materials such as polyesters, polyamides and other natural and synthetic materials compatible with the particular matrix also may be employed to provide selected properties.
The continuous filaments or fibers used in accordance with the present invention will vary in fiber diameter or denier as well as in fiber length, and it is preferred to utilize a range of fiber diameters. Where synthetic materials are employed, the diameters may vary from about 1.5 to 15 denier while for inorganic materials such as glass the fibers are usually very fine, with diameters falling in the low micrometer to submicrometer range. A
typical range for glass fibers is about 0.3 to 25 micrometers with the preferred range being about 3 to 12 micrometers. Carbon and graphite fibers are typically near the low end of the range for glass and preferably exhibit diameters of about 3 to 12 micrometers.
Those fibers may have an irregular cross section or may be circular or "dog-bone" in configuration.
In accordance with the present invention, it is preferred that a predominant number of fibers be aligned axially. The orientation results in some degree from the production techniques used to form the resultant product, but also is specifically designed into these devices. These techniques include molding, such as compression molding, but the preferred technique is a form of extrusion known as pultrusion. In the pultrusion process, a sizing or coupling agent is applied to the continuous filaments to improve the wetting thereof by the polymeric matrix and enhance matrix fiber bond. The treated fibers are aligned and maintained in position as they are pulled through a bath of matrix polymer.
The fibers are maintained under tension while the matrix material, which is in a near liquid state, ultimately engages and effectively wets the fibers and results in more effective coupling and hence improved mechanical properties. Physically holding the fibers in position helps to assure even and uniform distribution of the fibers in the final composite. As the fibers and matrix leave the polymer bath, the composite may pass through a series of rollers or dies to develop a uniform exterior or outside dimension and assure that the fibers do not protrude through the outside matrix surface.
The continuous fibers are usually disposed in a parallel array relative to each other and are aligned along one dimension such as the major dimension of the device being produced. The continuous filament composite material is capable of providing a material having a modulus of elasticity beyond the range available with polymeric materials used
Suitable composite materials are commercially available. Jeneric~/Pentron~
Incorporated of Wallingford, CT, USA manufactures and sells FibreKorTM in convenient ready-to-use sizes. Similarly, Ivoclar North America manufactures and sells VectrisTM. Both FibreKorTM and VectrisTM are preferred composite materials for fabricating the post of the present invention. They exhibit a high modulus of elasticity and high strength, matching that of non-precious alloys. They also exhibit translucency which closely matches that of human dental tissue, which is preferred for the present: invention.
The composite material utilized in accordance with the present invention is composed of two essential components, a polymeric matrix and fibres embedded within the matrix. The fibers preferably take the form of long continuous filaments, although these filaments may be as short as 3 to 4 millimeters. Alternatively, shorter fibers of uniform or random lengths might also be employed.
Although a variety of fibers may be employed, the most commonly used fibers are glass, carbon and/or graphite, and polyaramid fibers such as the fibers sold under the trade name "Kevlar". Other materials such as polyesters, polyamides and other natural and synthetic materials compatible with the particular matrix also may be employed to provide selected properties.
The continuous filaments or fibers used in accordance with the present invention will vary in fiber diameter or denier as well as in fiber length, and it is preferred to utilize a range of fiber diameters. Where synthetic materials are employed, the diameters may vary from about 1.5 to 15 denier while for inorganic materials such as glass the fibers are usually very fine, with diameters falling in the low micrometer to submicrometer range. A
typical range for glass fibers is about 0.3 to 25 micrometers with the preferred range being about 3 to 12 micrometers. Carbon and graphite fibers are typically near the low end of the range for glass and preferably exhibit diameters of about 3 to 12 micrometers.
Those fibers may have an irregular cross section or may be circular or "dog-bone" in configuration.
In accordance with the present invention, it is preferred that a predominant number of fibers be aligned axially. The orientation results in some degree from the production techniques used to form the resultant product, but also is specifically designed into these devices. These techniques include molding, such as compression molding, but the preferred technique is a form of extrusion known as pultrusion. In the pultrusion process, a sizing or coupling agent is applied to the continuous filaments to improve the wetting thereof by the polymeric matrix and enhance matrix fiber bond. The treated fibers are aligned and maintained in position as they are pulled through a bath of matrix polymer.
The fibers are maintained under tension while the matrix material, which is in a near liquid state, ultimately engages and effectively wets the fibers and results in more effective coupling and hence improved mechanical properties. Physically holding the fibers in position helps to assure even and uniform distribution of the fibers in the final composite. As the fibers and matrix leave the polymer bath, the composite may pass through a series of rollers or dies to develop a uniform exterior or outside dimension and assure that the fibers do not protrude through the outside matrix surface.
The continuous fibers are usually disposed in a parallel array relative to each other and are aligned along one dimension such as the major dimension of the device being produced. The continuous filament composite material is capable of providing a material having a modulus of elasticity beyond the range available with polymeric materials used
-6-heretofore. For example, a continuous filament material can be formulated to provide a composite that exhibits a modulus in the range of 1.01 to 60x106 psi and greater. With glass or synthetic materials the modulus may be up t:o about 35x106 psi while with carbon fibers the modulus may fall within a range up to 40-50x106 psi.
The polymeric materials employed as the matrix for the reinforcing fibers preferably are fully polymerized thermoplastic materials although a wide variety of polymeric materials may be employed, including partially polymerized thermosetting materials. The thermoplastics allow ease of formability and the stiffness, strength, springback and creep resistance preferable for this invention. For example, the polymeric material may include polyamides such as nylon, polyesters, glycol esters such as polyethylene terephthalate glycol, polyolefins such as polypropylene or polyethylene, polyimides, polyarylates, polyurethanes, styrene, styrene acrylonitrils, ABS, polysufones, polyacetals, polycarbonates, polyphenylene sulfides, or a wide variety of other polymeric compositions including vinylesters and epoxy type materials. Among this group, the thermoplastic materials are preferred since they are not as brittle, exhibit greater toughness and more readily facilitate the formation of the post.
The method of the present invention begins after root canal therapy has commenced and a mold is made of the root canal of the subject tooth and the neighbouring teeth in a conventional manner. The practitioner of this method commences by determining the depth of the root canal and cutting a bundle of the fibre-reinforced composite material to a length which will fill the void and protrude approximately 2 to 3 mm. The bundle is preferably created from flat pre-formed strips of the material and is used such that the orientation of the fibres runs up and down, substantially parallel to the root canal. The bundle should be formed to a diameter which snugly fits within the void to ensure a proper fit in the tooth restoration. The bundle should be tamped down slightly within the root canal so as to better mold it to the root canal. At all time, the material is not handled by hand so as to avoid contamination, in accordance with the manufacturer's instructions.
It is essential that the bundle be uncured or only partially cured when it is first formed. Because the bundle is flexible before curing, the bundle will mold itself to the shape of the root canal to ensure a proper fit. Once a proper bundle is created, the bundle may then be cured to complete polymerization of the matrix material. It is preferable to use light-s curing material although other curing methods are available and may be suitably adapted to the present method.
The core and the crown are then built up onto the post using conventional and well-known techniques and materials. Preferred materials for the core and crown include polymer/ceramic composite materials such as SculptureTM available from Jeneric~/Pentron~
Incorporated or TargisTM available from Ivoclar North America. The completed post/core/crown combination may then be installed in the root canal using conventional and well known techniques and adhesives.
As will be apparent to those skilled in the art, various modifications, adaptations and variations of the foregoing specific disclosure can be made without departing from the teachings of the present invention.
_g_
The polymeric materials employed as the matrix for the reinforcing fibers preferably are fully polymerized thermoplastic materials although a wide variety of polymeric materials may be employed, including partially polymerized thermosetting materials. The thermoplastics allow ease of formability and the stiffness, strength, springback and creep resistance preferable for this invention. For example, the polymeric material may include polyamides such as nylon, polyesters, glycol esters such as polyethylene terephthalate glycol, polyolefins such as polypropylene or polyethylene, polyimides, polyarylates, polyurethanes, styrene, styrene acrylonitrils, ABS, polysufones, polyacetals, polycarbonates, polyphenylene sulfides, or a wide variety of other polymeric compositions including vinylesters and epoxy type materials. Among this group, the thermoplastic materials are preferred since they are not as brittle, exhibit greater toughness and more readily facilitate the formation of the post.
The method of the present invention begins after root canal therapy has commenced and a mold is made of the root canal of the subject tooth and the neighbouring teeth in a conventional manner. The practitioner of this method commences by determining the depth of the root canal and cutting a bundle of the fibre-reinforced composite material to a length which will fill the void and protrude approximately 2 to 3 mm. The bundle is preferably created from flat pre-formed strips of the material and is used such that the orientation of the fibres runs up and down, substantially parallel to the root canal. The bundle should be formed to a diameter which snugly fits within the void to ensure a proper fit in the tooth restoration. The bundle should be tamped down slightly within the root canal so as to better mold it to the root canal. At all time, the material is not handled by hand so as to avoid contamination, in accordance with the manufacturer's instructions.
It is essential that the bundle be uncured or only partially cured when it is first formed. Because the bundle is flexible before curing, the bundle will mold itself to the shape of the root canal to ensure a proper fit. Once a proper bundle is created, the bundle may then be cured to complete polymerization of the matrix material. It is preferable to use light-s curing material although other curing methods are available and may be suitably adapted to the present method.
The core and the crown are then built up onto the post using conventional and well-known techniques and materials. Preferred materials for the core and crown include polymer/ceramic composite materials such as SculptureTM available from Jeneric~/Pentron~
Incorporated or TargisTM available from Ivoclar North America. The completed post/core/crown combination may then be installed in the root canal using conventional and well known techniques and adhesives.
As will be apparent to those skilled in the art, various modifications, adaptations and variations of the foregoing specific disclosure can be made without departing from the teachings of the present invention.
_g_
Claims (7)
1. A tooth restoration system for insertion into a tooth upon which root canal therapy has taken place, said system comprising a post, a core and a crown wherein:
(a) the post is formed from a fibre-reinforced composite material comprising a polymeric matrix and a reinforcing fibre component embedded within the matrix, said post having an upper end and a lower end, said lower end molded to the root canal;
(b) the core is bonded to the upper end of the post and is formed from a ceramic material or a polymer/ceramic composite material; and (c) the crown is bonded to and partially surrounds the core and is formed from a ceramic material or a polymer/ceramic composite material.
(a) the post is formed from a fibre-reinforced composite material comprising a polymeric matrix and a reinforcing fibre component embedded within the matrix, said post having an upper end and a lower end, said lower end molded to the root canal;
(b) the core is bonded to the upper end of the post and is formed from a ceramic material or a polymer/ceramic composite material; and (c) the crown is bonded to and partially surrounds the core and is formed from a ceramic material or a polymer/ceramic composite material.
2. The tooth restoration system of claim 1 wherein the fibre-reinforced composite material is uncured or partially cured as it is being formed into the post and is completely cured subsequent to being molded to the root canal.
3. The tooth restoration system of claims 1 or 2 wherein the fibre-reinforced composite material is similarly translucent to human dental tissue.
4. A method of preparing a dental implant comprising a post, a core and a crown for restoring a tooth upon which root canal therapy has taken place, the method comprising the steps of:
(a) creating a post from a fibre-reinforced composite material comprising a polymeric matrix and a reinforcing fibre component embedded within the matrix, having an upper end and a lower end, said lower end molded to the root canal;
(b) building up a core onto the upper end of the post from a ceramic or polymer/ceramic composite material; and (c) forming a crown around the core from a ceramic or polymer/ceramic composite material and shaping the crown to simulate the lost tooth.
(a) creating a post from a fibre-reinforced composite material comprising a polymeric matrix and a reinforcing fibre component embedded within the matrix, having an upper end and a lower end, said lower end molded to the root canal;
(b) building up a core onto the upper end of the post from a ceramic or polymer/ceramic composite material; and (c) forming a crown around the core from a ceramic or polymer/ceramic composite material and shaping the crown to simulate the lost tooth.
5. The method of claim 4 wherein the fibre-reinforced composite material is uncured or partially cured as it is being formed into the post and is completely cured subsequent to being molded to the root canal.
6. The method of one of claim 4 or 5 wherein the fibre-reinforced composite material is similarly translucent to human dental tissue.
7. The method of claim 6 further comprising the step of inserting and securing the dental implant into the void created by the root canal therapy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2234137 CA2234137A1 (en) | 1998-04-03 | 1998-04-03 | Tooth restoration using fibre-reinforced composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2234137 CA2234137A1 (en) | 1998-04-03 | 1998-04-03 | Tooth restoration using fibre-reinforced composite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2234137A1 true CA2234137A1 (en) | 1999-10-03 |
Family
ID=29275501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2234137 Abandoned CA2234137A1 (en) | 1998-04-03 | 1998-04-03 | Tooth restoration using fibre-reinforced composite material |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2234137A1 (en) |
-
1998
- 1998-04-03 CA CA 2234137 patent/CA2234137A1/en not_active Abandoned
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6267597B1 (en) | Tooth restoration using fibre-reinforced composite material | |
| US4894012A (en) | Passive dental appliances of fiber-reinforced composites | |
| US5964592A (en) | Nonmetallic dental post and method | |
| US6334775B2 (en) | Continuous fiber-reinforced dental restorations | |
| US6186790B1 (en) | Prefabricated components for dental appliances | |
| US6599125B1 (en) | Prefabricated components for dental appliances | |
| US6846181B2 (en) | Prefabricated components for dental appliances | |
| Ferrari et al. | Retrospective study of the clinical performance of fiber posts | |
| US9492360B2 (en) | Endodontic post and obturator | |
| CA2447834C (en) | A prepreg, a composite and their uses | |
| US6428319B1 (en) | Endodontic obturator system | |
| KR100400690B1 (en) | Polymer-fibre prepreg, preparation method thereof and use of prepreg | |
| US20040241614A1 (en) | Prefabricated components for dental appliances | |
| US7204875B2 (en) | Dental filling material | |
| RU97115816A (en) | POLYMER-FIBERED BREAK, METHOD FOR ITS OBTAINING, AND ALSO APPLICATION OF THE SPECIFIED BREAK | |
| US6200136B1 (en) | Fiber-reinforced dental bridge and method of manufacture thereof | |
| US8298664B2 (en) | Fiber-reinforced composite dental materials and method of manufacture | |
| CZ300384B6 (en) | Shapable prepreg | |
| US6114409A (en) | Dental material and tool for its application | |
| US20060024645A1 (en) | Tooth root canal point | |
| Vivek et al. | Denture base materials: Some relevant properties and their determination | |
| US20070003904A1 (en) | Reinforced composites for use in dental restorations | |
| Brown | Fibre-reinforced materials | |
| CA2234137A1 (en) | Tooth restoration using fibre-reinforced composite material | |
| Auplish et al. | Immediate anterior tooth replacement using fibre-reinforced composite |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |