CA2042992A1 - Method for manufacturing and implanting a tooth prosthesis - Google Patents
Method for manufacturing and implanting a tooth prosthesisInfo
- Publication number
- CA2042992A1 CA2042992A1 CA 2042992 CA2042992A CA2042992A1 CA 2042992 A1 CA2042992 A1 CA 2042992A1 CA 2042992 CA2042992 CA 2042992 CA 2042992 A CA2042992 A CA 2042992A CA 2042992 A1 CA2042992 A1 CA 2042992A1
- Authority
- CA
- Canada
- Prior art keywords
- abutment
- impression
- bore
- onto
- patient
- 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
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 230000035876 healing Effects 0.000 claims abstract description 38
- 230000010485 coping Effects 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims description 31
- 239000007943 implant Substances 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000004575 stone Substances 0.000 claims description 12
- 239000011324 bead Substances 0.000 claims description 4
- 238000007796 conventional method Methods 0.000 abstract description 10
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 210000002105 tongue Anatomy 0.000 description 2
- 206010018785 Gingival infections Diseases 0.000 description 1
- 240000004053 Rorippa indica Species 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 210000002808 connective tissue Anatomy 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 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
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
Landscapes
- Dental Prosthetics (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Disclosed is a method of manufacturing and implanting a tooth prosthesis, which method comprises much less steps than the conventional method that is presently being used, and is simpler to carry out, thanks to the use of a new dental appliance which can broadly be defined as a combined healing cap on impression coping.
Disclosed is a method of manufacturing and implanting a tooth prosthesis, which method comprises much less steps than the conventional method that is presently being used, and is simpler to carry out, thanks to the use of a new dental appliance which can broadly be defined as a combined healing cap on impression coping.
Description
A TOOl~ PROSTHESIS
BACKGROUND OF T}IIS INVENTION
5a) Field of the invention The present invention relates to a method for manufacturing and implanting a tooth prosthesis.
More particularly it relates to a method for manufacturing an artificial tooth fixable onto an abutment projectinq from an artificial root implant mounted into the ~aw-bone of a patient's mouth, which method is much simpler than the conventional method that is presently being carried out, thanks to the use of a combined healing cap and impression coping formed as a one-piece member.
15The invention also relates to this one-piece member useful as a combined healing cap and impression coping.
b) Erief de~cri~tion o~ the prior art The conventional method that is presently being carried out to manufacture a tooth prosthesis and to implant it into the mouth of a patient, comprises a very specific sequence of steps that are well known by those skilled in this art and extensively disclosed, by way of example, in U.S. patent No. 4,854,872 in the name of Stephen G. DETSCH.
1- This sequence of steps starts by a first appointment given by the dentist to the patient. During this first appointment, the dentist makes a preliminary examination of the patient. He takes radiographs of the patient's mouth; he checks the sufficiency of the bone to determine whether an implantology is possible and he establishes a medical history of the patient. Then, he proceeds with a first surgical operation and inserts an artificial root implant into the jaw bone of the patient.
Provided that no problem was encountered during this first surgical operation and that the osteointegration of the root implant is satisfactory after 4 to 6 months, the patient is given a second appointment.
BACKGROUND OF T}IIS INVENTION
5a) Field of the invention The present invention relates to a method for manufacturing and implanting a tooth prosthesis.
More particularly it relates to a method for manufacturing an artificial tooth fixable onto an abutment projectinq from an artificial root implant mounted into the ~aw-bone of a patient's mouth, which method is much simpler than the conventional method that is presently being carried out, thanks to the use of a combined healing cap and impression coping formed as a one-piece member.
15The invention also relates to this one-piece member useful as a combined healing cap and impression coping.
b) Erief de~cri~tion o~ the prior art The conventional method that is presently being carried out to manufacture a tooth prosthesis and to implant it into the mouth of a patient, comprises a very specific sequence of steps that are well known by those skilled in this art and extensively disclosed, by way of example, in U.S. patent No. 4,854,872 in the name of Stephen G. DETSCH.
1- This sequence of steps starts by a first appointment given by the dentist to the patient. During this first appointment, the dentist makes a preliminary examination of the patient. He takes radiographs of the patient's mouth; he checks the sufficiency of the bone to determine whether an implantology is possible and he establishes a medical history of the patient. Then, he proceeds with a first surgical operation and inserts an artificial root implant into the jaw bone of the patient.
Provided that no problem was encountered during this first surgical operation and that the osteointegration of the root implant is satisfactory after 4 to 6 months, the patient is given a second appointment.
2- During this second appointment, the dentist proceeds to a second surgical operation. First of all, he clears by surgery the top of the root implant which has become partially or completely covered by the patient's gum which recedes ~aturally with time. Then, he mounts onto the root implant a healing or permanent abutment, usually with a screw, and he covers this abutment with a cup-shaped protective member called a healing cap. The abutment that is so mounted is, in practice, a kind of small post also known as a prosthesis coronal member, which is designed to be attached to the artificial root implant when healing and bore integration of this root lmplant is completed, and then to act as an "external"
support for a dental prothetic appliance such as a crown, an artificial tooth, a partial denture or a bridge. The abutment is shaped to pass through the connective tissue and the overlying gum to provide attachment to the tooth prosthesis.
support for a dental prothetic appliance such as a crown, an artificial tooth, a partial denture or a bridge. The abutment is shaped to pass through the connective tissue and the overlying gum to provide attachment to the tooth prosthesis.
3- One or two weeks later, the patient is given a third appointment, during which the dentist proceeds to a clinical examination of the gum. If no hyperplasy is found, the dentist then proceeds as follows:
a) he removes the healing cap;
b) he removes the healing abutment if such a healing abutment has been used, and replaces it by a permanent abutment:
c) he screws another cap-shaped member known as an impression coping, onto the abutment;
d) he prepares an impression holder and pla~es it in the patient's mouth;
e) he takes an impression in the mouth of the patient, by injecting a hardenable, semi-rigid impression 2~2992 material such as Impregnum, Polygel or polysulfide, in the impression holder in such a manner as to completely embed the impression coping;
f) when the impression material is hard and forms the requested impression, he unscrews the impression coping from the abutment;
g) then, he removes the impression holder from the patient's mouth and sends the impression to a laboratory specialized in the manufacture of tooth prosthesis; and h) he replaces the healing cap onto the abutment or mounts a temporary crown onto this abutment.
a) he removes the healing cap;
b) he removes the healing abutment if such a healing abutment has been used, and replaces it by a permanent abutment:
c) he screws another cap-shaped member known as an impression coping, onto the abutment;
d) he prepares an impression holder and pla~es it in the patient's mouth;
e) he takes an impression in the mouth of the patient, by injecting a hardenable, semi-rigid impression 2~2992 material such as Impregnum, Polygel or polysulfide, in the impression holder in such a manner as to completely embed the impression coping;
f) when the impression material is hard and forms the requested impression, he unscrews the impression coping from the abutment;
g) then, he removes the impression holder from the patient's mouth and sends the impression to a laboratory specialized in the manufacture of tooth prosthesis; and h) he replaces the healing cap onto the abutment or mounts a temporary crown onto this abutment.
4- In the laboratory, the technician who receives the impression, proceeds as follows:
a) he screws onto the impression coping embedded in the impression a rigid member called an analog, which has an upper portion ~ized and shaped as the abutment that is fixed into the mouth of the patient, and a lower portion shaped as a long stem;
b) he applies over and inserts into another hardenable material the impression from the bottom of which the stem of the analog pro~ects, and~ using the impression as a mold, let this other material to harden and form a dental stone;
c) he unscrews the impression coping fixed to the analog and removes the resulting stone from the upper portion of which the analog projects, then forming a full-size reproduction of the gum as it was taken by the impression, showing the exact shape, position and orientation of the abutment in the mouth of the patient;
d) he uses the stone and analog connected thereto by its stem to select, make or adapt the required artificial tooth, which usually comprises a metal base shaped to be fixed onto the abutment, and a covering made of colored porcelain; and e) he sends to the dentist the artificial tooth 20~2~92 that was so selected, made or adapted.
a) he screws onto the impression coping embedded in the impression a rigid member called an analog, which has an upper portion ~ized and shaped as the abutment that is fixed into the mouth of the patient, and a lower portion shaped as a long stem;
b) he applies over and inserts into another hardenable material the impression from the bottom of which the stem of the analog pro~ects, and~ using the impression as a mold, let this other material to harden and form a dental stone;
c) he unscrews the impression coping fixed to the analog and removes the resulting stone from the upper portion of which the analog projects, then forming a full-size reproduction of the gum as it was taken by the impression, showing the exact shape, position and orientation of the abutment in the mouth of the patient;
d) he uses the stone and analog connected thereto by its stem to select, make or adapt the required artificial tooth, which usually comprises a metal base shaped to be fixed onto the abutment, and a covering made of colored porcelain; and e) he sends to the dentist the artificial tooth 20~2~92 that was so selected, made or adapted.
5- Then, the patient is called for a fourth appointment, during which the dentist removes again the healing cap from the mouth of the patient and connects to the permanent abutment the artificial tooth received from the laboratory. If necessary, the dentist may return the artificial tooth to the laboratory so that it be corrected or modified before being permanently mounted in the mouth of the patient.
SUHMARY OF TH~ INV~NTION
An object of the present invention is to provide a method for manufacturing and implanting a tooth prosthesis, which method comprises much less steps than the conventional method that has been disclosed hereinabove, and i5 simpler to carry out, thanks to the use of a new dental appliance which can be broadly defined a combined healing cap and impression coping.
Another object of this invention is this new combined healing cap and impression coping which is formed as a one-piece member.
More particularly, the invention as broadly claimed hereinafter proposes a one-piece member useful as a combined healing cap and impression coping in a tooth prosthesis, which member comprises:
- an abutment-receiving bore made therein, this bore being shaped and sized to fit exactly onto an abutment attachable to an artificial root implant, these abutment and root implant being parts of the tooth prosthesis;
- anti-rotation means within the bore to prevent the one-piece member from rotating with respect to the abutment when this one-piece member is fixed by a screw onto this abutment; and - marking means on the member, outside the bore, to form positioning marks into an impression material that 2042~g2 may be applied externally over the one-piece member.
The member according to the invention may also comprise a central counterbore on top of it, which opens into the bore and is sized to receive a screw allowing fixation of the member onto the abutment.
Preferably also, the bore made in the member is downwardly and outwardly tapering to fit onto a similarly shaped abutment.
The invention also provides a method of manufacturing an artificial tooth fixable onto an abutment projecting from an artificial root implant mounted in the jaw-bone of a patient's mouth, this abutment, once installed in the mouth, being covered by a healing cap until the tooth prosthesis is ready to be fixed thereto, which method comprises the steps of:
a) using a one-piece member according to the invention as defined hereinabove as healing cap to cover the abutment when this abutment is installed in the patient's mouth;
b) taking an impression of this one-piece member in the patient's mouth, using the one-piece member as an impression coping; and c) removing the impression from the impression coping mounted in the patient's mouth and forwarding this impression to a tooth prosthesis manufacturing laboratory where:
- an exact copy of the one-piece member covering the abutment in the patient's mouth is inserted into the impression, in replacement of the one left in the patient's mouth;
- an analog having an upper portion identical in size and shape to the abutment mounted in the mouth of the patient, and a bottom portion shaped as a long stem, is : fixed to this exact copy;
- the impression from which the stem of the analog projects, is used as a mold for a hardable material to form a dental stone in which the stem is embedded;
- the impression and exact copy of the one-piece member are removed from the analog, thereby letting the upper portion thereof together with the surrounding stone, form an exact, tridimensional reproduction of the shape and position of the abutment in the mouth of the patient;
and - selecting, making or adapting an artificial too~h to make it to fit onto the dental stone and analog connected thereto, this artificial tooth having a metal base designed to fit and be fixed onto the upper portion of the analog, whereby the artificial tooth that is so selected, made or adapted, can subsequently be fixed as such onto the abutment in the mouth of the patient without any positioning ad~ustment, except for occlusal modifications if necessary for desired contacts.
BRIFF DFSCRIPTION OF THF DRAWINGS
20The invention will be better understood from the following, non-restrictive detailed description thereof, made with reference to the accompanying drawings in which:
Fig. 1 is an exploded perspective view of an example of tooth prosthesis that can be manufactured and implanted with the method according to the invention;
Figs. 2 and 3, labelled as "prior art", are perspective views of the healing cap and impression coping to be used in the conventional method of manufacturing and implanting to the tooth prosthesis of Fig. 1, respectively;
Fig. 4 is a perspective view of a combined healing cap and impression coping member according to the invention, mounted on top of the abutment and root implant combination shown in Fig. l;
35Fig. 5 is a cross-sectional side elevational view .
.~ . - $
204299;~
of the combined bealing cap and impression coping member of Fig. 4, this member being shown is mounted on top of an impression analog.
Fig. 6 is a cross-sectional side elevational view of a plastic cap mounted on top of an impression analog embedded into a dental stone, this plastic cap being useful in particular to manufacture bridges in a very easy and fast manner.
DETAIL~D D~SCRIPTI~N OF THE INVENTION
a) general deæcription of an example of tooth prosthesis that can be manufactured and implanted by the method according to th~ invention Fig. 1 shows an example of a tooth prosthesis that can be manufactured and implanted by the method according to the invention. This tooth prosthesis is already disclosed in copending application serlal No.
filed on in the name of two of the present inventors, namely Jean PICHE and Pierre ROCHON. It comprises an artificial root implant 19 which consists of a self-tapping titanium screw that can be driven into the cavity left in the jaw-bone of the patient's mouth, by the extraction or fall of the material tooth. The implant 19 has a vertical blind bore 21 downwardly extending from its top surface 22, the bore 21 being coaxially extended by an integral nut 23. Threaded through the nut 23 and entering the bore 21 i5 the threaded lower part 25 of a titanium connector element 27 having an upper part 29 is formed with a blind bore 31 extended by a coaxial nut 33 mounted - fast at its open end. As will be understood, rotation of the nut 33 causes fastening of the connector element 27 to the root fixture 19. Advantageously, the latter is drilled, at its lower end, with a hole 35 which becomes invested with the tissue of the ~aw-bone so as to prevent undue rotation of the fixture 19. Additionally, a cavity 37 may be left for the same purpose.
20~2~9~
Prior to being accured by threading to the root fixture 19, the connector element 27 is inserted into a t~tanium abutment 39 formed as a sleeve, with a bore 41 that is provided with a polygonal counterbore at its lower end into which the nut 33 fits to prevent rotation of the abutment 39 relative to the root implant 19, when this nut extends outwardly.
After such an insertion, the upper part 29 of the connector element is located inside the bore 41 and thus covered by the abutment 39. $his upper part 29 is wider than the threaded lower part 25 and bears against a flange inside the abutment to hold the same onto the implant.
The abutment 39 has a lower section 43 which is essentially cylindrical and may be 1 to 5 mm high. It preferably has a chamfered lower end 45 to fit any size of root implant 19, which preferably joins the top surface 22 of the implant 19. The abutment also has an upper section 47 which tapers from the lower section 43.
Set over the abutment 39 is an artificial tooth 49 made up of an artificial tooth-shaped ceramic body in which a metal base 51 is rigidly inserted. The ceramic body is molded around the base 51 while a bore 53 is created. The metal base 51 acts as a core making a counterbore into which it is wholly received, as shown, with the neck of the tooth terminating at the lower tip of the metal base so that the latter is not visible from the outside.
The metal base 51 is shaped as an inverted cup, at one end, including a straight transverse bottom wall having a screw hole at its center, and a lateral wall flaring outwardly from the bottom wàll.
As can be gathered from Fig. 1, both the upper section 47 of the abutment 39 and the lateral wall of the metal base 51 are circular in cross-section and are sized and shaped such that the metal base 51 fits snugly over 20~2~
the upper section 47 of the abutment, with the bottom wall of this metal base standing slightly above the nut 33 of the connector element 27.
Anti-rotation means are provided in order to prevent relative rotation between the artificial tooth 49 and the abutment 39. Such means may be joined in the form of axially extending ribs or tongues, projecting from the inner face of the lateral wall of the metal base and fitting into complementary grooves provided in the abutment as is shown in copending application No.
Such means may also consist of at least one flat bevelled surface 52 made the inner face of the lateral wall of the metal base and fitting into a complementary flat bevelled surface 48 made in the lateral wall of the upper section 49.
The artificial tooth is securely fixed to the root implant l9 by a gold screw 67 inserted successively through the bore 53 of the artificial tooth 49 and a coaxial bore 69 made in the metal base 51, and then threaded into the nut 33 solid with the connector element 27 which is itself tightly screwed into the nut 23 solid with the root implant l9. A washer 70 provided with a plurality of radially extending twisted pins may be used to lock the screw 67 when it is being threaded.
When the assembly is completed, the bridge 57 comes in abutment against the top of the abutment 39 or, preferably, the outer tip of the base metal of the inner wall of the metal base comes to butt against the inner end of the tapering upper section 47 of the abutment 39.
While the securing screw 67 has been said to be made of gold and the root fixture l9; the connector sleeve 39 and the insert 51 made of titanium, it will be understood of course that they may be made of any other suitable material.
As aforesaid, the tooth prosthesis shown in Fig.
20~29~
1 is disclosed in great details in copending application serial No. . The present invention is not restricted however to the use of this tooth prosthesis. As a matter of fact, the invention could be easily carried out with numerous other tooth prosthesis known in the art, provided that they comprise the same basic components as the prosthesis shown in Fig. 1. Examples of other prosthesis of this type that could be easily adapted to carry out the method according to the invention are disclosed, by way of example, in U.S. paten~ No. 4,854,872 to Steven G. DETSCH and U.S. patent No. 4,850,870 to Richard J. LAZZARA et al.
b) further description of the Gonventional method used to manufacture and implant a tooth prosthesis as disclosed hereinabove The method that is presently being used to manufacture and implant in the mouth of a patient a tooth prosthesis as shown in Fig. 1, has already been disclosed in great details hereinabove in the brief description of the prior art given in the background of the invention.
This conventional method makes use of a plurality of auxiliary appliances, including inter alia a healing cap 71 as shown in Fig. 2, and an impression coping 81 as shown in Fig. 3.
The healing cap 71 is a cup-shaped protective member intended to be fixed by a screw on top of the connecting member 27 to hold in place, close and protect the abutment 39 mounted on top of the root implant 19 until the artificial tooth 49 is ready to be mounted. It comprises a flat bottom in which a bore 73 is made. This bore 73 i5 shaped and sized to fit èxactly onto the upper Section 47 of the abutment 39. It also comprises a counterbore 75 made in its top, this counterbore being coaxial with the bore 73 and opening therein to allow the screw 67 to pass and be threaded into the nut 33 in order 20~'~992 to fix the healing cap 71 on top of the abutment 39.
In use, the healing cap has to be removed to take the impression to be sent to the laboratory, and subsequently to replace until the artificial tooth 49 is ready.
The impression coping 81 shown in Fig. 3 is used to take the impression during the third step of the conventional method as disclosed hereinabove. It consists of an elongated member made of brass and provided at its bottom end with a bore 83 shaped and sized to fit exactly onto and fully cover the upper section 47 of the abutment 39. This member is also provided with a counterbore 85 extending from its top down to the bore 83 and coaxially therewith to let pass a long fixation screw to fit it to the connection member 27 on top of the abutment 39. The impression coping 81 further comprises external impression retaining means to engage and retain the impression material when the same is injected. These means usually comprise an annular groove 87 extending externally onto the member, preferably on top of the same, so as to cause the impression material to form an annular bead engaging the impression coping 81 when this material is injected.
The retaining means may also comprise means to lock the impression coping in a given position into the impression.
These locking means may consist of external identation or simply of a square head as shown in Fig. 3, which prevent the coping from rotating within the impression material after the same has been applied thereto.
c) description of the method according to the invention The method of manufacturing and implanting a tooth prosthesis according to the invention comprises the same first and second steps as disclosed hereinabove in the background of the invention, except that, in the second step, use is essentially made of a permanent abutment provided with anti-rotation means in its lateral wall, .
;....
2~29~
like the one numbered 39 in Fig. 1, and of a healing cap hereinafter called a one-piece member, which is provided with anti-rotation means cooperating with those of the abutment to lock both of these components in a predetermined position and orientation after they are connected.
As is better shown in Figs. 4 and 5, the one-piece member 91 used as healing cap is generally cylindrical and cup-shaped. It has an outer diameter substantially identical to the one of the lower Section 43 of the abutment to prevent the gum from receding of this lower Section, and it comprises an abutment-receiving bore 93 extending upwardly from its bottom surface.
As aforesaid, the one-piece member 91 also comprises anti-rotation means within the bore 93 to prevent the member 91 from rotating with respect to the abutment when this one-piece member is fixed onto this abutment.
Theee anti-rotation means must of course be selected to match with those provided externally onto the upper portion of the abutment.
The anti-rotation means may comprise at least one set of tongue and groove provided in the lateral wall of the bore 93, this set being shaped and sized to fit into a mirror copy of this set provided for this purpose in the lateral wall of the abutment.
When use is made of an abutment as the one numbered 39 in Fig. l, the anti-rotation means may comprise a flat bevelled surface 97 projecting from the lateral wall of the bore 93, this bevelled surface 97 being shaped and sized to fit and snap into and against the bevelled surface 48 provided in the external wall of the upper portion 47 of the abutment 41.
The one-piece member 91 further ~omprises a central counterbore g9 extending downwardly from its top 20~2~92 surface and opening into the bore 93. This counterbore 99 is sized to let pass a screw allowing fixation of the member onto the abutment, in the very same manner as the conventional healing cap 71, shown in Fig. 2.
Last of all, the one-piece member 91 comprises marking means on its external surfaca, outside the bore 93 to form positioning marks into an impression material that may be applied externally onto it, as will be explained hereinafter.
As shown in Figs. 4 and 5, these marking means preferably comprises an annular groove 101 extending externally on the member, preferably near the top thereof, all around the bore 93 to cause the impression material to be formed with an annular bead when this material is applied onto the member. The marking means also comprises at least one position-defining identation externally made on the member to form a similar identation into the impression material when this material is applied onto the member. This identation may comprise a flat bevelled surface 103 cut into a portion of the lateral wall of the one-piece member 91. The identation may also consist in flattened zones 105 made in the lateral wall of the top portion of the member, above the groove 101.
In any case, it is compulsory that the marking means of the one piece member 91, be "smooth" enough to allow the impression which, even after it has hardened, still has some resiliency, to be removed from it without breaking. Indeed, an essential feature of the method according to the invention is the elimination of the ~0 necessity to install and remove a separate impression coping in and from the patient~s mouth when the impression is taken.
The third step of the method according to the invention thus excludes sub-steps (a), (b), (c), (f) and (h) of the third step of the conventional method as it was , ..
1~
disclosed hereinabove. As explained hereinabove, this is achieved as a result of the very particular structure of the one-piece member 91 that, due to the marking means on its external surface, is also useful as an impression coping. Thus, in the third step of the method according to the invention, the impression is taken directly onto the one-piece member 91 which is already mounted in the mouth of the patient and which, accordingly, needs not be unscrewed, replaced by a separate impression coping like the one shown in Fig. 3 and subsequently screwed again after the impression has been taken.
The fourth step of the method according to the invention is carried out as follows:
a) the technician inserts and "snaps" into the hole left in the impression by the one-piece member 51 left in the patient's mouth, an exact copy of this one-piece member 91 mounted in the patient's mouth, this copy being made of brass or anyother rigid material;
b) he screws onto this exact copy an analog 111 as shown in Fig. 5, having an upper portion 113 identical in size and shape to the abutment mounted in the mouth of the patient with the same kind of anti-rotation means, and a lower portion 115 shaped as a lonq stem; and c) he carries out sub-steps (b), (c), (d) and (e) of the fourth step of the conventional method, except that he uses, in this particular case, the exact copy of one-piece member 91 acting as combined healing cap and impression coping, instead of using the impression coping shown in Fiq. 3.
To make sub-step (d) easier to carry out, use can be made of a small plastic covering 95 as is shown in Fig.
SUHMARY OF TH~ INV~NTION
An object of the present invention is to provide a method for manufacturing and implanting a tooth prosthesis, which method comprises much less steps than the conventional method that has been disclosed hereinabove, and i5 simpler to carry out, thanks to the use of a new dental appliance which can be broadly defined a combined healing cap and impression coping.
Another object of this invention is this new combined healing cap and impression coping which is formed as a one-piece member.
More particularly, the invention as broadly claimed hereinafter proposes a one-piece member useful as a combined healing cap and impression coping in a tooth prosthesis, which member comprises:
- an abutment-receiving bore made therein, this bore being shaped and sized to fit exactly onto an abutment attachable to an artificial root implant, these abutment and root implant being parts of the tooth prosthesis;
- anti-rotation means within the bore to prevent the one-piece member from rotating with respect to the abutment when this one-piece member is fixed by a screw onto this abutment; and - marking means on the member, outside the bore, to form positioning marks into an impression material that 2042~g2 may be applied externally over the one-piece member.
The member according to the invention may also comprise a central counterbore on top of it, which opens into the bore and is sized to receive a screw allowing fixation of the member onto the abutment.
Preferably also, the bore made in the member is downwardly and outwardly tapering to fit onto a similarly shaped abutment.
The invention also provides a method of manufacturing an artificial tooth fixable onto an abutment projecting from an artificial root implant mounted in the jaw-bone of a patient's mouth, this abutment, once installed in the mouth, being covered by a healing cap until the tooth prosthesis is ready to be fixed thereto, which method comprises the steps of:
a) using a one-piece member according to the invention as defined hereinabove as healing cap to cover the abutment when this abutment is installed in the patient's mouth;
b) taking an impression of this one-piece member in the patient's mouth, using the one-piece member as an impression coping; and c) removing the impression from the impression coping mounted in the patient's mouth and forwarding this impression to a tooth prosthesis manufacturing laboratory where:
- an exact copy of the one-piece member covering the abutment in the patient's mouth is inserted into the impression, in replacement of the one left in the patient's mouth;
- an analog having an upper portion identical in size and shape to the abutment mounted in the mouth of the patient, and a bottom portion shaped as a long stem, is : fixed to this exact copy;
- the impression from which the stem of the analog projects, is used as a mold for a hardable material to form a dental stone in which the stem is embedded;
- the impression and exact copy of the one-piece member are removed from the analog, thereby letting the upper portion thereof together with the surrounding stone, form an exact, tridimensional reproduction of the shape and position of the abutment in the mouth of the patient;
and - selecting, making or adapting an artificial too~h to make it to fit onto the dental stone and analog connected thereto, this artificial tooth having a metal base designed to fit and be fixed onto the upper portion of the analog, whereby the artificial tooth that is so selected, made or adapted, can subsequently be fixed as such onto the abutment in the mouth of the patient without any positioning ad~ustment, except for occlusal modifications if necessary for desired contacts.
BRIFF DFSCRIPTION OF THF DRAWINGS
20The invention will be better understood from the following, non-restrictive detailed description thereof, made with reference to the accompanying drawings in which:
Fig. 1 is an exploded perspective view of an example of tooth prosthesis that can be manufactured and implanted with the method according to the invention;
Figs. 2 and 3, labelled as "prior art", are perspective views of the healing cap and impression coping to be used in the conventional method of manufacturing and implanting to the tooth prosthesis of Fig. 1, respectively;
Fig. 4 is a perspective view of a combined healing cap and impression coping member according to the invention, mounted on top of the abutment and root implant combination shown in Fig. l;
35Fig. 5 is a cross-sectional side elevational view .
.~ . - $
204299;~
of the combined bealing cap and impression coping member of Fig. 4, this member being shown is mounted on top of an impression analog.
Fig. 6 is a cross-sectional side elevational view of a plastic cap mounted on top of an impression analog embedded into a dental stone, this plastic cap being useful in particular to manufacture bridges in a very easy and fast manner.
DETAIL~D D~SCRIPTI~N OF THE INVENTION
a) general deæcription of an example of tooth prosthesis that can be manufactured and implanted by the method according to th~ invention Fig. 1 shows an example of a tooth prosthesis that can be manufactured and implanted by the method according to the invention. This tooth prosthesis is already disclosed in copending application serlal No.
filed on in the name of two of the present inventors, namely Jean PICHE and Pierre ROCHON. It comprises an artificial root implant 19 which consists of a self-tapping titanium screw that can be driven into the cavity left in the jaw-bone of the patient's mouth, by the extraction or fall of the material tooth. The implant 19 has a vertical blind bore 21 downwardly extending from its top surface 22, the bore 21 being coaxially extended by an integral nut 23. Threaded through the nut 23 and entering the bore 21 i5 the threaded lower part 25 of a titanium connector element 27 having an upper part 29 is formed with a blind bore 31 extended by a coaxial nut 33 mounted - fast at its open end. As will be understood, rotation of the nut 33 causes fastening of the connector element 27 to the root fixture 19. Advantageously, the latter is drilled, at its lower end, with a hole 35 which becomes invested with the tissue of the ~aw-bone so as to prevent undue rotation of the fixture 19. Additionally, a cavity 37 may be left for the same purpose.
20~2~9~
Prior to being accured by threading to the root fixture 19, the connector element 27 is inserted into a t~tanium abutment 39 formed as a sleeve, with a bore 41 that is provided with a polygonal counterbore at its lower end into which the nut 33 fits to prevent rotation of the abutment 39 relative to the root implant 19, when this nut extends outwardly.
After such an insertion, the upper part 29 of the connector element is located inside the bore 41 and thus covered by the abutment 39. $his upper part 29 is wider than the threaded lower part 25 and bears against a flange inside the abutment to hold the same onto the implant.
The abutment 39 has a lower section 43 which is essentially cylindrical and may be 1 to 5 mm high. It preferably has a chamfered lower end 45 to fit any size of root implant 19, which preferably joins the top surface 22 of the implant 19. The abutment also has an upper section 47 which tapers from the lower section 43.
Set over the abutment 39 is an artificial tooth 49 made up of an artificial tooth-shaped ceramic body in which a metal base 51 is rigidly inserted. The ceramic body is molded around the base 51 while a bore 53 is created. The metal base 51 acts as a core making a counterbore into which it is wholly received, as shown, with the neck of the tooth terminating at the lower tip of the metal base so that the latter is not visible from the outside.
The metal base 51 is shaped as an inverted cup, at one end, including a straight transverse bottom wall having a screw hole at its center, and a lateral wall flaring outwardly from the bottom wàll.
As can be gathered from Fig. 1, both the upper section 47 of the abutment 39 and the lateral wall of the metal base 51 are circular in cross-section and are sized and shaped such that the metal base 51 fits snugly over 20~2~
the upper section 47 of the abutment, with the bottom wall of this metal base standing slightly above the nut 33 of the connector element 27.
Anti-rotation means are provided in order to prevent relative rotation between the artificial tooth 49 and the abutment 39. Such means may be joined in the form of axially extending ribs or tongues, projecting from the inner face of the lateral wall of the metal base and fitting into complementary grooves provided in the abutment as is shown in copending application No.
Such means may also consist of at least one flat bevelled surface 52 made the inner face of the lateral wall of the metal base and fitting into a complementary flat bevelled surface 48 made in the lateral wall of the upper section 49.
The artificial tooth is securely fixed to the root implant l9 by a gold screw 67 inserted successively through the bore 53 of the artificial tooth 49 and a coaxial bore 69 made in the metal base 51, and then threaded into the nut 33 solid with the connector element 27 which is itself tightly screwed into the nut 23 solid with the root implant l9. A washer 70 provided with a plurality of radially extending twisted pins may be used to lock the screw 67 when it is being threaded.
When the assembly is completed, the bridge 57 comes in abutment against the top of the abutment 39 or, preferably, the outer tip of the base metal of the inner wall of the metal base comes to butt against the inner end of the tapering upper section 47 of the abutment 39.
While the securing screw 67 has been said to be made of gold and the root fixture l9; the connector sleeve 39 and the insert 51 made of titanium, it will be understood of course that they may be made of any other suitable material.
As aforesaid, the tooth prosthesis shown in Fig.
20~29~
1 is disclosed in great details in copending application serial No. . The present invention is not restricted however to the use of this tooth prosthesis. As a matter of fact, the invention could be easily carried out with numerous other tooth prosthesis known in the art, provided that they comprise the same basic components as the prosthesis shown in Fig. 1. Examples of other prosthesis of this type that could be easily adapted to carry out the method according to the invention are disclosed, by way of example, in U.S. paten~ No. 4,854,872 to Steven G. DETSCH and U.S. patent No. 4,850,870 to Richard J. LAZZARA et al.
b) further description of the Gonventional method used to manufacture and implant a tooth prosthesis as disclosed hereinabove The method that is presently being used to manufacture and implant in the mouth of a patient a tooth prosthesis as shown in Fig. 1, has already been disclosed in great details hereinabove in the brief description of the prior art given in the background of the invention.
This conventional method makes use of a plurality of auxiliary appliances, including inter alia a healing cap 71 as shown in Fig. 2, and an impression coping 81 as shown in Fig. 3.
The healing cap 71 is a cup-shaped protective member intended to be fixed by a screw on top of the connecting member 27 to hold in place, close and protect the abutment 39 mounted on top of the root implant 19 until the artificial tooth 49 is ready to be mounted. It comprises a flat bottom in which a bore 73 is made. This bore 73 i5 shaped and sized to fit èxactly onto the upper Section 47 of the abutment 39. It also comprises a counterbore 75 made in its top, this counterbore being coaxial with the bore 73 and opening therein to allow the screw 67 to pass and be threaded into the nut 33 in order 20~'~992 to fix the healing cap 71 on top of the abutment 39.
In use, the healing cap has to be removed to take the impression to be sent to the laboratory, and subsequently to replace until the artificial tooth 49 is ready.
The impression coping 81 shown in Fig. 3 is used to take the impression during the third step of the conventional method as disclosed hereinabove. It consists of an elongated member made of brass and provided at its bottom end with a bore 83 shaped and sized to fit exactly onto and fully cover the upper section 47 of the abutment 39. This member is also provided with a counterbore 85 extending from its top down to the bore 83 and coaxially therewith to let pass a long fixation screw to fit it to the connection member 27 on top of the abutment 39. The impression coping 81 further comprises external impression retaining means to engage and retain the impression material when the same is injected. These means usually comprise an annular groove 87 extending externally onto the member, preferably on top of the same, so as to cause the impression material to form an annular bead engaging the impression coping 81 when this material is injected.
The retaining means may also comprise means to lock the impression coping in a given position into the impression.
These locking means may consist of external identation or simply of a square head as shown in Fig. 3, which prevent the coping from rotating within the impression material after the same has been applied thereto.
c) description of the method according to the invention The method of manufacturing and implanting a tooth prosthesis according to the invention comprises the same first and second steps as disclosed hereinabove in the background of the invention, except that, in the second step, use is essentially made of a permanent abutment provided with anti-rotation means in its lateral wall, .
;....
2~29~
like the one numbered 39 in Fig. 1, and of a healing cap hereinafter called a one-piece member, which is provided with anti-rotation means cooperating with those of the abutment to lock both of these components in a predetermined position and orientation after they are connected.
As is better shown in Figs. 4 and 5, the one-piece member 91 used as healing cap is generally cylindrical and cup-shaped. It has an outer diameter substantially identical to the one of the lower Section 43 of the abutment to prevent the gum from receding of this lower Section, and it comprises an abutment-receiving bore 93 extending upwardly from its bottom surface.
As aforesaid, the one-piece member 91 also comprises anti-rotation means within the bore 93 to prevent the member 91 from rotating with respect to the abutment when this one-piece member is fixed onto this abutment.
Theee anti-rotation means must of course be selected to match with those provided externally onto the upper portion of the abutment.
The anti-rotation means may comprise at least one set of tongue and groove provided in the lateral wall of the bore 93, this set being shaped and sized to fit into a mirror copy of this set provided for this purpose in the lateral wall of the abutment.
When use is made of an abutment as the one numbered 39 in Fig. l, the anti-rotation means may comprise a flat bevelled surface 97 projecting from the lateral wall of the bore 93, this bevelled surface 97 being shaped and sized to fit and snap into and against the bevelled surface 48 provided in the external wall of the upper portion 47 of the abutment 41.
The one-piece member 91 further ~omprises a central counterbore g9 extending downwardly from its top 20~2~92 surface and opening into the bore 93. This counterbore 99 is sized to let pass a screw allowing fixation of the member onto the abutment, in the very same manner as the conventional healing cap 71, shown in Fig. 2.
Last of all, the one-piece member 91 comprises marking means on its external surfaca, outside the bore 93 to form positioning marks into an impression material that may be applied externally onto it, as will be explained hereinafter.
As shown in Figs. 4 and 5, these marking means preferably comprises an annular groove 101 extending externally on the member, preferably near the top thereof, all around the bore 93 to cause the impression material to be formed with an annular bead when this material is applied onto the member. The marking means also comprises at least one position-defining identation externally made on the member to form a similar identation into the impression material when this material is applied onto the member. This identation may comprise a flat bevelled surface 103 cut into a portion of the lateral wall of the one-piece member 91. The identation may also consist in flattened zones 105 made in the lateral wall of the top portion of the member, above the groove 101.
In any case, it is compulsory that the marking means of the one piece member 91, be "smooth" enough to allow the impression which, even after it has hardened, still has some resiliency, to be removed from it without breaking. Indeed, an essential feature of the method according to the invention is the elimination of the ~0 necessity to install and remove a separate impression coping in and from the patient~s mouth when the impression is taken.
The third step of the method according to the invention thus excludes sub-steps (a), (b), (c), (f) and (h) of the third step of the conventional method as it was , ..
1~
disclosed hereinabove. As explained hereinabove, this is achieved as a result of the very particular structure of the one-piece member 91 that, due to the marking means on its external surface, is also useful as an impression coping. Thus, in the third step of the method according to the invention, the impression is taken directly onto the one-piece member 91 which is already mounted in the mouth of the patient and which, accordingly, needs not be unscrewed, replaced by a separate impression coping like the one shown in Fig. 3 and subsequently screwed again after the impression has been taken.
The fourth step of the method according to the invention is carried out as follows:
a) the technician inserts and "snaps" into the hole left in the impression by the one-piece member 51 left in the patient's mouth, an exact copy of this one-piece member 91 mounted in the patient's mouth, this copy being made of brass or anyother rigid material;
b) he screws onto this exact copy an analog 111 as shown in Fig. 5, having an upper portion 113 identical in size and shape to the abutment mounted in the mouth of the patient with the same kind of anti-rotation means, and a lower portion 115 shaped as a lonq stem; and c) he carries out sub-steps (b), (c), (d) and (e) of the fourth step of the conventional method, except that he uses, in this particular case, the exact copy of one-piece member 91 acting as combined healing cap and impression coping, instead of using the impression coping shown in Fiq. 3.
To make sub-step (d) easier to carry out, use can be made of a small plastic covering 95 as is shown in Fig.
6, that is desig~ed and molded to fit exactly and be screwable onto the upper portion of the analog, projecting from the dental stone, as it would onto the abutment attached to the root implant screwed in the patient's 20~2992 jawbone. Such a plastic covering ~5 can be used as a mold-shaping form and thus be embedded into a mold-forming material to define therein a cavity into which gold or other metals may subsequently be injected to form the metal base 51 of the artificial tooth.
The fifth step remains the same.
As can now be understood, the method according to the invention comprises much less sub-steps that the conventional method. Accordingly, it is much easier to carry out, especially for the dentist. It makes use of a one-piece member 91 acting as a combined healing cap and impression coping, which member is especially designed for this purpose, as was explained hereinabove.
d) advantages of the method of according to the invention The main advantages of the method according to this invention are as follows:
1- it permits to avoid the use of a healing abutment, since a permanent abutment can be mounted immediately and permanently onto the artificial root implant;
2- the one-piece member acting as combined healing cap and impression coping has to be mounted and adjusted only once onto the abutment;
3- it permits to eliminate a surgical step that is time consuming and unconfortable for the patient, i.e.
the removal of a conventional healing cap and/or healing abutment, the replacement of it by an impression coping and, after the impression is taken, the reinsertion of another healing cap;
4- it also permits to eliminate at least one-piece of hardware, namely the imprèssion coping that is now combined with the healing cap; and 5- it permits to reduce to a significant extent the risks of gum infection and osseous contamination due to the successive screwing and unscrewing of the separate 20~2992 healing cap and impression coping onto the abutment.
All these advantages make the implantology of an artificial tooth much easier to be carried out, and thus much readily accessible to some dentists who are presently ~stopped~ by the complexity of this method.
The method according to the invention which is simpler to be carried out by the dentist, is also more conforting for the patient. It allows subtantial reduction in operation time, in addition of reducing the inventory of necessary accessories to carry it out.
In the following description, the sequence of steps that are being carried out has been given for the installation of only one single artificial tooth. In this connection, it is worth mentioning that the sequence of steps to be carried out to implant a more complicated prosthesis including, for example, a bridge, is very similar to the one previously disclosed except that several root implant each provided with an abutment on top have to be mounted into the jaw-bone and the subsequent impression has to be taken in such a manner as to "incorporate" ~ll the abutments.
Once again, plastic coverings 95 as previously disclosed and shown in Fig. 6 may be of a great help, as they can be joined together by a thick layer of hardenable plastic material applied onto the dental stone"s" to form an exact reproduction of the requested bridge structure, and this reproduction then can be used as a "form" to shape the mold into which gold will be injected to form the bridge.
These "variants" must therefore be considered as being also encompassed by the present invention.
The fifth step remains the same.
As can now be understood, the method according to the invention comprises much less sub-steps that the conventional method. Accordingly, it is much easier to carry out, especially for the dentist. It makes use of a one-piece member 91 acting as a combined healing cap and impression coping, which member is especially designed for this purpose, as was explained hereinabove.
d) advantages of the method of according to the invention The main advantages of the method according to this invention are as follows:
1- it permits to avoid the use of a healing abutment, since a permanent abutment can be mounted immediately and permanently onto the artificial root implant;
2- the one-piece member acting as combined healing cap and impression coping has to be mounted and adjusted only once onto the abutment;
3- it permits to eliminate a surgical step that is time consuming and unconfortable for the patient, i.e.
the removal of a conventional healing cap and/or healing abutment, the replacement of it by an impression coping and, after the impression is taken, the reinsertion of another healing cap;
4- it also permits to eliminate at least one-piece of hardware, namely the imprèssion coping that is now combined with the healing cap; and 5- it permits to reduce to a significant extent the risks of gum infection and osseous contamination due to the successive screwing and unscrewing of the separate 20~2992 healing cap and impression coping onto the abutment.
All these advantages make the implantology of an artificial tooth much easier to be carried out, and thus much readily accessible to some dentists who are presently ~stopped~ by the complexity of this method.
The method according to the invention which is simpler to be carried out by the dentist, is also more conforting for the patient. It allows subtantial reduction in operation time, in addition of reducing the inventory of necessary accessories to carry it out.
In the following description, the sequence of steps that are being carried out has been given for the installation of only one single artificial tooth. In this connection, it is worth mentioning that the sequence of steps to be carried out to implant a more complicated prosthesis including, for example, a bridge, is very similar to the one previously disclosed except that several root implant each provided with an abutment on top have to be mounted into the jaw-bone and the subsequent impression has to be taken in such a manner as to "incorporate" ~ll the abutments.
Once again, plastic coverings 95 as previously disclosed and shown in Fig. 6 may be of a great help, as they can be joined together by a thick layer of hardenable plastic material applied onto the dental stone"s" to form an exact reproduction of the requested bridge structure, and this reproduction then can be used as a "form" to shape the mold into which gold will be injected to form the bridge.
These "variants" must therefore be considered as being also encompassed by the present invention.
Claims (14)
1. A one-piece member useful as a combined healing cap and impression coping in a tooth prosthesis, said member comprising:
- an abutment-receiving bore made therein, said bore being shaped and sized to fit exactly onto an abutment attachable to an artificial root implant, said abutment and implant being parts of said tooth prosthesis;
- anti-rotation means within said bore to prevent said one-piece member from rotating with respect to said abutment when said one-piece member is fixed by a screw onto said abutment; and - marking means on said member, outside said bore, to form positioning marks into an impression material that may be applied externally over the said one-piece member, said marking means being smooth enough in shape to allow the impression material to be removed from said member without breaking, after hardening.
- an abutment-receiving bore made therein, said bore being shaped and sized to fit exactly onto an abutment attachable to an artificial root implant, said abutment and implant being parts of said tooth prosthesis;
- anti-rotation means within said bore to prevent said one-piece member from rotating with respect to said abutment when said one-piece member is fixed by a screw onto said abutment; and - marking means on said member, outside said bore, to form positioning marks into an impression material that may be applied externally over the said one-piece member, said marking means being smooth enough in shape to allow the impression material to be removed from said member without breaking, after hardening.
2. The member of claim 1, wherein said anti-rotation means comprises at least one set of tongue and groove provided in a wall of said bore, said at least one set being shaped and sized to fit into a mirror copy of said at least one set, provided for this purpose in a wall of said abutment.
3. The member of claim 1, wherein said anti-rotation means consists of at least one flat bevelled surface made in a wall of said bore, said at least one bevelled surface being shaped and sized to fit against a corresponding bevelled surface provided for the purpose in a wall of the abutment.
4. The member of claim 1, wherein said marking means comprises an annular groove extending externally or said member all said bore to form an annular bead in the impression material when said material is applied onto the member, and at least one position-defining identation externally made on said member to form a similar identation into the impression material when said material is applied onto said member.
5. The member of claim 3, wherein said marking means comprises an annular groove extending externally on said number all around said bore to form an annular bead in the impression material when said material is applied onto the member, and at least one position-defining identation externally made on said member to form a similar identation into the impression material when said material is applied onto said member.
6. The member of claim 3, further comprising:
- a central counterbore on top of said member, said counterbore opening into said bore and being sized to receive a screw allowing fixation of said member onto said abutment.
- a central counterbore on top of said member, said counterbore opening into said bore and being sized to receive a screw allowing fixation of said member onto said abutment.
7. The member of claim 5, further comprising:
- a central counterbore on top of said member, said counterbore opening into said bore and being sized to receive a screw allowing fixation to said member onto said abutment.
- a central counterbore on top of said member, said counterbore opening into said bore and being sized to receive a screw allowing fixation to said member onto said abutment.
8. The member of claim 1, wherein said bore made in said member is downardly and outwardly tapering.
9. The member of calim 3, wherein said bore made in said member is downwardly and outwardly tapering.
10. The member of claim 5, wherein said bore made in said member is downwardly and outwardly tapering.
11. The member of claim 6, wherein said bore made in said member is downwardly and outwardly tapering.
12. The member of claim 7, wherein said bore made in said member is downwardly and outwardly tapering.
13. A method of manufacturing an artificial tooth fixable onto an abutment projecting from an artificial root implant mounted in the jaw-bone of a patient's mouth, said abutment, once installed in the mouth, being covered by a healing cap until the tooth prosthesis is ready to be fixed thereto, said method comprising the steps of:
a) using a one-piece member as claimed in anyone of claims 1 to 12 as said healing cap to cover the abutment when said abutment is installed in the patient's mouth;
b) taking an impression of said one-piece member in the patient's mouth, using said one-piece member as an impression coping; and c) removing said impression from said one-piece member and forwarding said removed impression to a tooth prosthesis manufacturing laboratory where:
- an exact copy of the one-piece member covering the abutment in the patient's mouth is inserted into the impression, in replacement of said one-piece member left in the patient's mouth;
- an analog having an upper portion identical in size and shape to the abutment mounted in the mouth of the patient and a bottom portion shaped as a long tem is fixed to said exact copy;
- the impression from which the stem of the analog projets, is used as a mold for a hardable material to form a dental stone in which said stem is embedded;
- the impression and exact copy of the one-piece member are removed from the analog, thereby letting the upper portion thereof together with the surrounding stone, form an exact, tridimensional reproduction of the shape and position of the abutment in the mouth of the patient;
and - selecting, making or adapting an artificial tooth to make it to fit onto the dental stone and analog connected thereto, said artificial tooth having a metal base designed to fit and be fixed onto the upper portion of said analog, whereby the artificial tooth that is so selected, made or adapted, can subsequently be fixed as such onto the abutment in the mouth of the patient without any positioning adjustment, except for occlusions.
a) using a one-piece member as claimed in anyone of claims 1 to 12 as said healing cap to cover the abutment when said abutment is installed in the patient's mouth;
b) taking an impression of said one-piece member in the patient's mouth, using said one-piece member as an impression coping; and c) removing said impression from said one-piece member and forwarding said removed impression to a tooth prosthesis manufacturing laboratory where:
- an exact copy of the one-piece member covering the abutment in the patient's mouth is inserted into the impression, in replacement of said one-piece member left in the patient's mouth;
- an analog having an upper portion identical in size and shape to the abutment mounted in the mouth of the patient and a bottom portion shaped as a long tem is fixed to said exact copy;
- the impression from which the stem of the analog projets, is used as a mold for a hardable material to form a dental stone in which said stem is embedded;
- the impression and exact copy of the one-piece member are removed from the analog, thereby letting the upper portion thereof together with the surrounding stone, form an exact, tridimensional reproduction of the shape and position of the abutment in the mouth of the patient;
and - selecting, making or adapting an artificial tooth to make it to fit onto the dental stone and analog connected thereto, said artificial tooth having a metal base designed to fit and be fixed onto the upper portion of said analog, whereby the artificial tooth that is so selected, made or adapted, can subsequently be fixed as such onto the abutment in the mouth of the patient without any positioning adjustment, except for occlusions.
14. The use of a one-piece member as claimed in anyone of claims 1 to 12 as a healing cap, an impression coping or both of them in a tooth prosthesis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2042992 CA2042992A1 (en) | 1991-05-21 | 1991-05-21 | Method for manufacturing and implanting a tooth prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2042992 CA2042992A1 (en) | 1991-05-21 | 1991-05-21 | Method for manufacturing and implanting a tooth prosthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2042992A1 true CA2042992A1 (en) | 1992-11-22 |
Family
ID=4147629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2042992 Abandoned CA2042992A1 (en) | 1991-05-21 | 1991-05-21 | Method for manufacturing and implanting a tooth prosthesis |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2042992A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998003130A1 (en) * | 1996-07-18 | 1998-01-29 | Biohorizons, Inc. | Abutment-mount system for dental implants |
| US6068480A (en) | 1996-07-18 | 2000-05-30 | Biohorizons Implant Systems, Inc. | Abutment-mount with square driving surface |
| WO2019202113A1 (en) * | 2018-04-20 | 2019-10-24 | Valoc Ag | Dental restoration, method of producing it, computer program and method of restoring a tooth |
| CN113509278A (en) * | 2021-04-15 | 2021-10-19 | 江苏创英医疗器械有限公司 | Dental abutment and implant |
| US11219510B2 (en) | 2015-11-20 | 2022-01-11 | Nobel Biocare Services Ag | Healing cap with scannable features |
-
1991
- 1991-05-21 CA CA 2042992 patent/CA2042992A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5927979A (en) | 1994-12-15 | 1999-07-27 | Biohorizons Implants Systems, Inc. | Abutment-mount system for dental implants |
| WO1998003130A1 (en) * | 1996-07-18 | 1998-01-29 | Biohorizons, Inc. | Abutment-mount system for dental implants |
| US6068480A (en) | 1996-07-18 | 2000-05-30 | Biohorizons Implant Systems, Inc. | Abutment-mount with square driving surface |
| US11219510B2 (en) | 2015-11-20 | 2022-01-11 | Nobel Biocare Services Ag | Healing cap with scannable features |
| WO2019202113A1 (en) * | 2018-04-20 | 2019-10-24 | Valoc Ag | Dental restoration, method of producing it, computer program and method of restoring a tooth |
| CN113509278A (en) * | 2021-04-15 | 2021-10-19 | 江苏创英医疗器械有限公司 | Dental abutment and implant |
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