KR101476698B1 - The prosthetic components and thereof connection method - Google Patents

Abstract

The present invention relates to a method of connecting a dental prosthetic appliance, and more particularly, to a dental prosthetic appliance in which damaged portions of teeth adjacent to each other are removed to the minimum, a prosthetic appliance is fixed by using the adjacent tooth as an abutment, and a phenomenon in which foreign substances are stuck in space between a fixing piece fixed to the abutment and the tooth is prevented and a method of connecting the dental prosthetic appliance. A connection piece fixed to the abutment so as to fix an artificial tooth may be tightly and stably fixed, and the phenomenon in which foreign substances are stuck in the space between the fixing piece that is fixed to the abutment and the tooth may be prevented. According to the present invention, to recover the damaged tooth, a peripheral tooth of the damaged tooth may be used as the abutment, and fixing plates are disposed on both sides of front and rear portions of the artificial tooth to fix the artificial tooth in a three-spot fixing manner. A flat headed bolt may be inserted and fixed to the abutment on each of the fixing plate fixed to each of the front and rear portions of the abutment while the fixing plate of the artificial tooth is supported by the three-spot fixing manner. Wobble between the fixing plate of the artificial tooth and the abutment may be prevented, and the phenomenon in which foreign substances are stuck in space between the fixing plate and the abutment may be prevented.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental prosthesis,

The present invention relates to a connecting method for connecting a dental prosthesis, and more particularly, it relates to a method of connecting a dental prosthesis to a dental prosthesis, in which adjacent teeth at a lost portion are minimally deleted, and a prosthesis is fixed by using an adjacent tooth as an abutment, The present invention relates to a dental prosthesis for connecting a dental prosthesis that can prevent foreign matter from being caught by a space between a fixing member and a tooth, and a method of connecting the dental prosthesis.

In general, a tooth of a human being is damaged or lost due to tooth decay or various oral diseases or accidents, pronunciation becomes incorrect, food is difficult to grind when ingesting food, and damaged or lost tooth

Due to poor visibility, I feel a sense of aesthetic depression.

In addition, when the teeth are left in a state in which the teeth are lost, other teeth in the vicinity of the lost teeth are not supported by the supporting force, so that the surrounding teeth are inclined to the lost tooth part.

Therefore, in order to protect the surrounding teeth of the lost tooth when the tooth is lost, it is possible to repair the lost or damaged tooth by using the prosthesis such as the crown bridge or the implant or the artificial tooth according to the state of the lost tooth, Methods of protecting teeth are widely known.

 And in modern times, since teeth are damaged, they can not be regenerated. Therefore, a method of mining damaged teeth to install a prosthesis has been widely studied.

Thus, the method of reusing damaged teeth while maintaining the condition of removing damaged teeth at a minimum from damaged teeth is widely preferred, and it is advantageous in that the operation time is shortened and the cost is reduced.

 In other words, dentures are used mainly through prostheses in order to repair damaged or lost teeth or missing tooth functions. Typically, dentures through the prosthesis are wrapped around the teeth which are deteriorated due to excessive tooth decay or nerve treatment A prosthesis for restoring the function of a lost or missing tooth, a prosthesis for improving the discoloration of the tooth, an abnormal shape, a gap between the teeth in the anterior part, and an artificial tooth root in the area where the tooth is lost and screwing the denture to the artificial tooth root And an implant to be fixed.

In general prosthesis among the above prostheses, a cap for covering the denture and the surfaces of the adjacent abutment teeth is provided to fix the denture to the damaged tooth position, and then the cap is covered on the dry body to fix the denture to the dry body. This is called a crown bridge.

In general prosthesis (crown bridge), the procedure is very short, the cost is low and the procedure is simple. On the other hand, the denture must be connected to the neighboring fixation cap in order to fix it. Inevitably, There is a drawback that the dryness is damaged.

Even after the procedure, there is a gap between the cap and the tooth due to the difference between the temperature and the temperature, and air and foreign substances easily enter into the gap, which makes it difficult to maintain. When foreign substances are introduced, have.

In addition, the implant implants the abutment on the upper part of the fixture after screwing the fixture on the alveolar bone of the part where the damaged tooth is located, and fixing the denture by screwing it on the upper part of the abutment, There is an advantage that the function of the teeth can be restored.

However, in order to fix the correct denture on the abutment fixed to the upper part of the fixture, the implant is made by using a tray to create a dent in a laboratory, and then, when the tooth is delivered to the dentist, , The delivered denture is placed on the patient's lost or damaged part to check the condition, and the uncomfortable part is sent back to the dental laboratory for correction.

Therefore, since the implant needs to be revised several times, it is inconvenient for the patient to visit the dentist several times to install the denture, and the procedure takes a long time.

In addition, the cost of the implant is very high, and due to the mechanical noise generated during the procedure for fixing the fixture to the alveolar bone, the patient should not only have a severe discomfort but also wait for 3 to 6 months Patients with chronic diseases such as hypertension and diabetes have a disadvantage in that the procedure is limited.

In order to solve the above problems, conventionally, a method of attaching a synthetic tooth to an abutment tooth after forming a wide plate, applying an adhesive, has been found.

However, the above method has a disadvantage that the metal plate does not adhere well to the abutment, so that it easily falls, and it is difficult for the dentist to attach the plate, and the operation time is long.

In order to solve the above problems, a hole is formed in the abutment, and a base plate is used to manufacture a connecting and fixing plate by using the base plate. However, it is difficult to fit the connection and fixing plate to the hole.

Recently, in order to solve the above problems, there has been proposed a method of fixing a denture by using a tooth around a lost or damaged tooth as an abutment without using an artificial root (Korean Patent No. 10-0416247) 10-1196821).

The above-mentioned methods are a method for restoring or treating a damaged tooth, which is a dental prosthesis for treating an artificial tooth using a material such as a metal material or a ceramic material;

The dental prosthesis is provided with an artificial tooth for replacing a damaged tooth and a fixing means for fixing the tooth to both adjacent teeth for fixing the artificial tooth so that independent prosthetic treatment can be performed.

More specifically, the upper portion of the abutment teeth on both sides of the lost tooth is sloped and flattened so that the upper fixing portion of the connecting piece is raised, and the upper and lower sides of the inclined plane are marked, It forms a ball.

After forming the fastening hole as described above, the impression is made, and the artificial tooth is manufactured on the basis of the impression. When the artificial tooth is manufactured, the connecting piece is fixed to the fastening hole of the abutment teeth formed on both sides or the upper and lower sides of the lost tooth Cement is applied.

In addition, cement is applied to the joint portion of the connecting piece fixed to the abutment, and then the connecting piece is inserted into the fastening hole formed in the abutment and fixed.

In the conventional connecting piece for abutment teeth, fixing protrusions are formed on both sides of a fixing part constituting a connecting piece, and these protrusions are fastened and fastened to the fastening holes formed in the abutment teeth.

After the connecting piece is fixed to the abutment teeth as described above, the cement is applied to the concave grooves formed on both sides of the artificial tooth, and the inserted portion fixed to the abutment is inserted to fix the artificial tooth.

However, in the above method, since the fixing protrusions are protruded on both sides of the connecting fixture, the fixing protrusions are fixed to the abutment teeth, and the protrusions are inserted into the fixing holes formed in the abutment teeth.

Although the connecting piece fixed to the abutment is fixed by the cement applied to the connecting part of the connecting piece, the main force when the food is consumed is the main force of the protrusion fastened to the connecting hole of the connecting piece.

That is, the protrusions formed on both sides of the connecting piece must support the force of the entire connecting piece, so that an unreasonable force acts on the connecting piece.

 Therefore, the conventional method is disadvantageous in that the connecting piece is fixed in a state in which only a part of the abutment is wrapped, so that the force is weak and all the force is required to bear the projection.

Thus, in the conventional method, the fastening holes are formed on both sides of the engaging surface of the abutment teeth to which the artificial teeth are engaged, and the projections formed on both sides of the fastening holes are inserted and fixed in the fastening holes. There is a problem that it is difficult to support it.

More specifically, if the abutments on both sides of the lost tooth are assumed to be circular, the abutment is formed into a circular shape because the connecting piece also has to surround the abutment having a circular shape.

However, since the connecting piece for fixing the abutment teeth used in the past has only a small part of the connecting piece to the circular abutment tooth, the connecting piece fixing the artificial tooth can not be firmly fixed to the abutment.

That is, when the abutment is assumed to be a circle of 360 °, the connecting piece fixed to the abutment is less than 20 to 40 °, so that the connecting abutment is not firmly fixed to the abutment.

Since the connecting piece fastened to the abutment is not firmly fixed to the abutment, an excessive force acts on the artificial tooth, or when the elongated time passes, the connecting piece flows easily in the abutment, resulting in a minute space between the connecting piece and the abutment .

As described above, there is a disadvantage in that a foreign material such as food waste, which is generated when food is consumed, is caught in the space that is formed in the connecting piece and the abutment tooth, resulting in tooth decay and various gum diseases.

Meanwhile, in recent years, there have been proposed a one-bridge method and a human bridge method in order to solve the above-mentioned problems. However, in the above methods, the length of the fastener is widened in the abutment teeth to fix the artificial teeth.

That is, when the abutment is extended by 180 ° or longer, the tooth is fattened. In order to solve this problem, when the abutment is thinned, the fastening piece made of metal is bent or the adhesive force is weak.

Recently, in order to solve the above-mentioned problems, a method has been developed in which a guide is formed by using a CAD / CAM to reduce the coronal wall by 90 degrees to obtain a retention in the tooth wall.

However, the above-described method is complicated and difficult, the guide can not be inserted into the molar teeth, and the abutment teeth must be wrapped over 180 degrees, resulting in a high manufacturing cost.

Korean Patent No. 10-0416247 (published on January 31, 2004) Korean Patent No. 10-1196821 (issued on November 6, 2012)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to fix a connecting piece fixed to an abutment tooth firmly and stably on an abutment to fix an artificial tooth.

Another additional object of the present invention is to provide a space between the abutment and the connecting piece to prevent foreign matter from being caught.

Means for solving the above problems will be described as follows.

A flat part machining step for machining a flat part so that a supporter formed on the upper side of the connecting and fixing piece is seated and fixed to the upper center part of the abutment teeth on both sides of the damaged tooth;

An impression preparing step of creating an impression between a flat part processed on the abutment teeth on both sides and the damaged tooth by the planar part processing step;

A synthetic tooth processing step of processing a fixed plate for fixing the artificial tooth and the artificial tooth in the laboratory using the impression obtained by the impression preparing step;

A cement applying step of supplying cement to the artificial tooth processed by the artificial tooth processing step to apply the cement to the joint surface of the abutment tooth and the fixing plate formed on both sides of the artificial tooth,

The artificial tooth coated with the cement is inserted between the abutment teeth by the cement applying step so that the supporting base protruded on both sides of the upper part of the artificial tooth is protruded and formed on both sides of the upper part of the artificial tooth in the plane part processed to correspond to the upper part of the abutment. The artificial teeth inserting step in which the first and second point fixing parts are fastened at one time and the fixing plate formed on the front and rear sides of the one-point fixing part and the artificial tooth are fastened to the abutment;

The artificial teeth are inserted between the abutment teeth by the artificial tooth insertion step so as to be seated on the teeth, and then the screw fastening holes are machined in the central part of the fixing plate formed on both sides of the artificial tooth, ;

A plate head bolt fastening step of fastening a plate head bolt to a fastening plate fixing the artificial tooth by the fastening hole processing step and a fastening hole formed in the abutment tooth so that the fastening plate is fixed tightly to the abutment; .

First Embodiment

A flat part machining step of machining a flat part so that a supporter formed on the upper side of the artificial tooth is hooked on the upper central part of the abutment teeth on both sides of the damaged tooth;

A step of machining a flat surface part by the planar part machining step and then machining a fastening groove for fastening a fastening protrusion formed at the end of the fixed plate of the artificial tooth outside the opposite abutment teeth of the flat part;

An impression preparing step of acquiring an impression between a flat surface portion machined to both abutment teeth, a fastening groove and a damaged tooth by the fastening groove processing step;

A synthetic tooth preparation step of fabricating a connecting fixation plate for fixing the artificial tooth and the artificial tooth in the laboratory using the impression obtained by the impression preparing step;

A cement applying step of applying the cement to the artificial tooth to receive the artificial tooth processed by the artificial tooth processing step and to fix the fixing plate formed on both sides of the artificial tooth and the joint surface of the abutment tooth in the dentistry;

The artificial tooth coated with the cement is inserted between the abutment teeth by the cement applying step so that the supporting base protruded on both sides of the upper part of the artificial tooth is protruded and formed on both sides of the upper part of the artificial tooth in the plane part processed to correspond to the upper part of the abutment. And a locking protrusion of a fixing plate formed on both front and rear sides of the artificial tooth is inserted and fastened into the fastening groove of the abutment;

The artificial teeth are inserted between the abutment teeth on both sides by the artificial tooth inserting step so as to be seated on the teeth, and then the screw fastening holes for machining the screw fastening holes to the abutment teeth using drills are formed in the central part of the fastening plate, Processing step;

A plate head bolt fastening step of fastening a plate head bolt to a fastening plate fixing the artificial tooth by the fastening hole processing step and a fastening hole formed in the abutment tooth so that the fastening plate is fixed tightly to the abutment; .

Second Embodiment

A one-point fixing part in which a support part of the artificial tooth is fastened by forming a flat part in the center of the fastening surface in the fastening hole processing step of the abutment;

And the second and third point fixing portions are formed by fastening the artificial teeth between the abutment teeth and then fastening the artificial teeth to the abutment teeth and forming the fastening holes to the interior of the abutment teeth and fastening the dish head bolts to the fastening holes, respectively. do.

Third Embodiment

And by the forming screw fastening holes for fixing the holder in the fixing of the second point or the third point at the angle at which the flat head bolt is originating from the support it is fixed to the flat portion when viewing the abutment in a circular 360 ° 30 ~ Deg.] To 100 [deg .].

The construction of the present invention will be described as follows.

A first point fixing part formed at the center of both upper sides of the artificial tooth 1 so as to be fixed to a horizontal part formed on the upper part of the abutment tooth and to be fixed;

The fixing plates 2 and 2 'are formed on both sides of the artificial tooth 1 and the fixing plates 2 and 2' are fixed to the fixing plates 2 and 2 ' And an artificial tooth 1 having second and third point fixing portions formed by screwing a dish head bolt 6 into a screw hole of 2 to 3 mm from the center of the abutment.

Fourth Embodiment

A locking protrusion 7 is formed at the end of the fixing plate 2 or 2 formed on both sides of the artificial tooth 1 composed of the three-point fixing part and the locking protrusion 7 is caught in the engagement groove of the abutment The second and third point fixing parts are firmly fixed so that the respective fixing plates 2 and 2 'are widened from the abutment teeth to prevent a gap from being formed between the respective fixing plates 2 and 2' and the abutment teeth .

Fifth Embodiment

A fastening hole 3 is formed in the artificial tooth 1 so that the artificial tooth is inserted into the artificial tooth 1 and a fastening jaw 5 is formed on the upper side of the fastening hole so as to support the artificial tooth to fasten artificial teeth made of ceramic or gold It is preferable to fix them.

In order to repair a damaged tooth, the present invention provides a fixation plate on both sides of the artificial tooth with the teeth located around the damaged tooth as an abutment tooth so that the artificial tooth is fixed in three fixed positions. The fixation plate of the artificial tooth is supported by the three-point fixation method, and each plate fixed to the front and rear of the abutment is inserted and fixed to the abutment tooth to prevent the occurrence of shaking between the fixation plate of the artificial tooth and the abutment, It is possible to prevent a foreign matter from being caught by occurrence of a space.

In addition, the present invention has the additional object of fixing the connecting fixture to three points on the abutment and making the fixing plate of the connecting fixture thick to prevent deformation, and to prevent the teeth from becoming fat.

Therefore, according to the present invention, the abutment teeth are fixed to the abutment teeth instead of wrapping the abutment teeth by more than 180 degrees, but the plate head bolts are fixed to be offset from the direction of abutment of the abutment teeth and screwed, And the fastening direction of the dish head bolt is staggered so as to be staggered from the direction in which the artificial tooth is pulled out, so that the artificial tooth can be prevented from being pulled out.

As described above, the present invention is a three-point fastening method using a screw, and a fixing plate for fixing the artificial tooth is fixed by inserting and fixing the artificial tooth into the abutment, thereby preventing a gap between the abutment tooth and the fixing plate, It is a useful invention that can save time and cost by simple process.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
2 is a schematic exploded perspective view showing the artificial teeth of the present invention
3 is a front view of the artificial tooth of the present invention
4 is a schematic perspective view showing an embodiment of the artificial tooth of the present invention.
5 is a schematic front view showing the use state of the embodiment of the present invention
6 is a schematic plan view showing the use state of the embodiment of the present invention.
7 is a schematic perspective view showing an embodiment of a fixing piece of artificial teeth according to the present invention.
8 is a schematic plan view showing the use state of the embodiment of the fixing member of the artificial tooth of the present invention

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In the present invention, reference numerals 10 and 20 denote artificial tooth bodies.

When the teeth are damaged as shown in FIGS. 2 and 3, the teeth on both sides of the damaged tooth are used as abutment teeth and the center of the abutment teeth on the corresponding surfaces is cut off on the basis of the damaged teeth, The horizontal portion is machined so that the formed support base 4 is seated.

As described above, the abutment teeth are trimmed in the horizontal section and then the impression is made. The impression that has been obtained is sent to the laboratories. In the laboratories, the artificial tooth is manufactured based on the impression sent from the dentist.

After the artificial tooth 1 manufactured in the laboratory is delivered, cement is applied to the joint surface of the abutment tooth and the fixing plate 2 (2 ') of the artificial tooth 1, and then the artificial tooth is inserted between the abutment teeth on both sides.

When the artificial tooth is inserted between the abutment teeth as described above, the support table 4 protruding from both sides of the upper part of the artificial tooth 1 is seated on the horizontal part formed on the upper part of the abutment tooth, Is inserted into the front and back of the abutment.

In the state where the artificial tooth 1 is seated in the tooth thus lost, a screw fastening hole is machined into the inside of the abutment by using a drill at the center portion of the end portion of the fastening plate 2 (2 ') fixing the abutment teeth The plate head bolts 6 are fastened to fix the fixing plates 2 and 2 'to the abutment teeth.

4 shows an embodiment of the artificial tooth according to the present invention. When artificial teeth made of ceramic or gold are inserted into the fastening holes 3 formed at the center of the body of the artificial tooth 1 from the bottom of the body, Is caught by the latching protrusion (5) formed on the upper part of the body and can not escape to the upper side and is fixed.

After the body having the artificial teeth inserted therein is put on the upper part of the damaged tooth to be seated, the fixing plates 2 and 2 'provided on the front and back sides of the artificial tooth 1 are fixed to the abutment.

The above method is simple and easy to manufacture because it is a method of inserting a ceramic tooth to be manufactured and sold as a ready-made product by inserting teeth into a body manufactured in advance with several sizes.

However, human teeth and gums have different shapes, so if you do not fit the prefabricated body, you can make the impression and make the body and teeth in the laboratory.

7 and 8 relate to an embodiment of the fixing plate 2 and 2 'on both sides of the artificial tooth 1 according to the present invention. When the artificial tooth is inserted between the abutment teeth, And the locking protrusion 7 formed on the cord portion of each of the fixing plates 2 and 2 'is inserted and fixed to the fixing groove by being inserted and fastened to the fixing groove 2'.

  When the engaging protrusions 7 of the respective fixing plates 2 and 2 formed on the front and rear sides of the artificial tooth 1 are inserted into the engaging grooves formed in the abutment teeth as described above, the locking protrusions 2 ' 7, the artificial tooth 1 is shaken by the plate head bolt 6 fastened and fixed to the center of the support plate 4 and each of the fixing plates 2, 2 ' It is possible to more strongly prevent the gap between the fixed plates 2 and 2 'and the abutment teeth from being separated from the abutment teeth 2' and 2 '.

On the other hand, in the present invention, the depth of the screw fastening holes for fixing the fastening plate to the abutment teeth in the fastening plates 2, 2 'formed on both the front and rear sides of the artificial tooth 1 is 2 to 3 mm at the surface of the abutment desirable.

In the above case, when the screw is fastened to the abutment teeth more than necessary, there is a disadvantage in that the strength of the abutment of the tooth is weakened, and the nerve of the abutment can be injured.

When the angle of the screw fastening holes formed on the fastening plates 2 and 2 'with the support base 4 as a starting point and the upper side of the artificial tooth 1 is positioned between 30 and 100 degrees, the abutment teeth become fat It is easy to process the screw fastening holes.

An embodiment of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention.

 The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms.

Accordingly, such improvements and modifications will fall within the scope of the present invention as long as it is obvious to those skilled in the art.

1. Artificial teeth 2. 2 '. Fixed plate
3. Fastening Ball 4. Support
5. Jaw jaws 6. Plate head bolts
7. Jilin procession

Claims (4)

A flat part machining step for machining a flat part so that a supporter formed on the upper side of the connecting and fixing piece is seated and fixed to the upper center part of the abutment teeth on both sides of the damaged tooth;
An impression preparing step of creating an impression between a flat part processed on the abutment teeth on both sides and the damaged tooth by the planar part processing step;
A synthetic tooth processing step of processing a fixed plate for fixing the artificial tooth and the artificial tooth in the laboratory using the impression obtained by the impression preparing step;
A cement applying step of supplying cement to the artificial tooth processed by the artificial tooth processing step to apply the cement to the joint surface of the abutment tooth and the fixing plate formed on both sides of the artificial tooth,
The artificial tooth coated with the cement is inserted between the abutment teeth by the cement applying step so that the supporting base protruded on both sides of the upper part of the artificial tooth is protruded and formed on both sides of the upper part of the artificial tooth in the plane part processed to correspond to the upper part of the abutment. The artificial teeth inserting step in which the first and second point fixing parts are fastened at one time and the fixing plate formed on the front and rear sides of the one-point fixing part and the artificial tooth are fastened to the abutment;
The artificial teeth are inserted between the abutment teeth by the artificial tooth insertion step so as to be seated on the teeth, and then the screw fastening holes are machined in the central part of the fixing plate formed on both sides of the artificial tooth, ;
A plate head bolt fastening step of fastening a plate head bolt to a fastening plate fixing the artificial tooth by the fastening hole processing step and a fastening hole formed in the abutment tooth so that the fastening plate is fixed tightly to the abutment; Wherein the dental prosthesis is attached to the dental prosthesis. A flat part machining step of machining a flat part so that a supporter formed on the upper side of the artificial tooth is hooked on the upper central part of the abutment teeth on both sides of the damaged tooth;
A step of machining a flat surface part by the planar part machining step and then machining a fastening groove for fastening a fastening protrusion formed at the end of the fixed plate of the artificial tooth outside the opposite abutment teeth of the flat part;
An impression preparing step of acquiring an impression between a flat surface portion machined to both abutment teeth, a fastening groove and a damaged tooth by the fastening groove processing step;
A synthetic tooth preparation step of fabricating a connecting fixation plate for fixing the artificial tooth and the artificial tooth in the laboratory using the impression obtained by the impression preparing step;
A cement applying step of applying the cement to the artificial tooth to receive the artificial tooth processed by the artificial tooth processing step and to fix the fixing plate formed on both sides of the artificial tooth and the joint surface of the abutment tooth in the dentistry;
The artificial tooth coated with the cement is inserted between the abutment teeth by the cement applying step so that the supporting base protruded on both sides of the upper part of the artificial tooth is protruded and formed on both sides of the upper part of the artificial tooth in the plane part processed to correspond to the upper part of the abutment. And a locking protrusion of a fixing plate formed on both front and rear sides of the artificial tooth is inserted and fastened into the fastening groove of the abutment;
The artificial teeth are inserted between the abutment teeth on both sides by the artificial tooth inserting step so as to be seated on the teeth, and then the screw fastening holes for machining the screw fastening holes to the abutment teeth using drills are formed in the central part of the fastening plate, Processing step;
A plate head bolt fastening step of fastening a plate head bolt to a fastening plate fixing the artificial tooth by the fastening hole processing step and a fastening hole formed in the abutment tooth so that the fastening plate is fixed tightly to the abutment; Wherein the dental prosthesis is attached to the dental prosthesis. delete delete

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