Use of an abutment having spherical and elliptical geometry compatible with real tooth elastoplastic and limited visco-elastic motion in a dental implant assembly

Abstract

The invention relates to a dental implant assembly formed by adapting a spherical and elliptical geometry between the implant and the crown and using PEEK / UHMWPE or similar biocompatible polymeric materials for elastoplastic and limited visco-elastic abutment movement.

Description

[0001] USE OF AN ABUTMENT HAVING SPHERICAL AND ELLIPTICAL GEOMETRY COMPATIBLE WITH REAL TOOTH ELASTOPLASTIC AND LIMITED VISCOELASTIC MOTION IN A DENTAL IMPLANT ASSEMBLY

[0002] Technical Field

[0003] The invention relates to a dental implant assembly formed by adapting a spherical and elliptical geometry between the implant and the crown and using PEEK / UHMWPE or similar biocompatible polymeric materials for elastoplastic and limited visco-elastic abutment movement.

[0004] State of the Art

[0005] Implants are materials placed in the tissue to restore a missing part of the human body and to restore aesthetics and function. Dental implants are artificial tooth roots used in dentistry to replace missing teeth. These implants are usually made of body-compatible materials such as titanium. Dental implants are placed in place of lost teeth and hold firmly on the jawbone, providing an aesthetically and functionally similar appearance and function to natural teeth. An abutment (fastener) is placed on the implant. This abutment provides the connection between the implant and the prosthetic tooth. In the final stage, the prosthetic tooth is placed on the abutment. The prosthetic tooth is specially prepared to be the closest color, shape, and size to the patient's natural teeth.

[0006] This system, consisting of implant, abutment and crown, is basically rigid. In the current system, the abutment used in dental implant applications is screwed onto the implant. According to the chewing pressure, the loads coming from all directions to the crown are transmitted to the implant by the metal abutment. The fact that the young moduli of the implant and the metal abutment are approximately 15 times higher than the jawbone structure creates a force accumulation on the jawbone with the incoming load in the artificial tooth structure, which becomes relatively rigid with the implant screw. Whereas in the natural tooth structure, the tooth root flexes with chewing pressure. This creates a natural suspension system. In the current system, there are patents, utility model applications, and articles related to implant technology. One of them is "Use of High Performance Polymers as Dental Implant Abutments and Frameworks: A Case Series Report". This article explains that dental implant abutments can be made of titanium, gold, zirconia, alumina, and polymeric materials. Polyetheretherketone (PEEK) is a high-performance thermoplastic polymer that can be used as a dental implant abutment. It has an elastic modulus comparable to bone and can reduce stress shielding. PEEK is a radiolucent material that allows better radiographic visualization of periimplant tissues. It can be coated with composite materials or bonded to ceramic. PEEK is widely used in orthopedic and spine surgeries and has mechanical and biological properties that promote its use as a dental implant abutment.

[0007] The application numbered "WO2011056450A2" in the known state of the art relates to dental implants and methods. The said implant is a pre-assembled dental implant comprising a preformed dental implant abutment and a subgingival implant anchorage receiving end, and an opposing end. It is noted that the opposing end is permanently bonded into a sufficiently malleable tooth material. The implant abutment is described as a metal, ceramic, plastic, composite, or a mixture thereof.

[0008] The application numbered "TR2020 / 08205", which is in the known state of the art, relates to an implant to be used for teeth. The invention relates to at least one implant with at least one body, including at least one body, including a groove to ensure that said body is held in the jaw bone, including at least one neck part and having at least one abutment slot to ensure that the artificial tooth is held in the head part in order to eliminate tooth deficiencies in the lower / upper jaw bone. The novelty of the invention is that the body comprises at least one fusion pocket configured to form a space between the body and the jaw bone to improve bone volume and that the neck portion is manufactured without a groove of a smaller diameter than the body to improve the bone thickness of the neck portion and the distribution of chewing stresses by connecting the body to the jaw bone.

[0009] As seen in the current system, there is no system that provides natural suspension. However, especially in the case of multiple adjacent tooth loss in existing implant systems, implant tooth- connected bridges are not preferred due to the rigidity of the implants.

[0010] Consequently, due to the above and the inadequacy of the existing solutions, a new technology is needed in which elastoplastic and limited visco-elastic behavior similar to that of natural teeth can be created on the implant. Brief Description and Objectives of the Invention

[0011] The invention relates to a dental implant assembly formed by adapting a spherical and elliptical geometry between the implant and the crown and using PEEK / UHMWPE or similar biocompatible polymeric materials for elastoplastic and limited visco-elastic abutment movement.

[0012] The aim of the invention is to create elastoplastic and limited visco-elastic behavior similar to natural teeth on the implant. For this purpose, the elastoplastic and limited visco-elastic abutment is manufactured by using PEEK / UHMWPE or biocompatible polymeric materials with similar properties that can be used for this purpose. In this way, the high-strength PEEK / UHMWPE (Polyaryletheretheretherketone / Ultra High Molecular Weight Polyethylene) material provides force suspension by providing force balance with natural springing. In addition, a plastic material with springing properties under the prosthesis can act as a suspension according to the chewing pressure, homogeneously distributing the load distribution and creating a natural tooth effect.

[0013] With the invention, manufacturing costs are reduced compared to the abutments currently used and produced by machining. In addition, flexibility of use and application is provided with force balance in bridge implant applications. With the invention, an alternative is provided for situations such as production, ease of assembly, and natural tooth flexibility compared to the abutments currently used in metal. In addition, with the new abutment design, moment formation is prevented between the main tooth and the implant with elastoplastic and limited visco-elastic movement behavior suitable for natural tooth mechanical behavior.

[0014] These Figures are as follows;

[0015] Figure 1 : a view of dental implant assembly including jawbone, implant, elastoplastic and limited visco-elastic abutment and crown.

[0016] Figure 2: a view of the edge-locking dental implant assembly including implant, elastoplastic, and limited visco-elastic abutment and crown.

[0017] Figure 3: a view of a center-locking dental implant assembly with implant, elastoplastic and limited visco-elastic abutment and crown. Element Numbers in Figures

[0018] In order to better explain the dental implant assembly comprising elastoplastic and limited visco-elastic abutments developed by the present invention, the parts and elements in the figures are numbered, and the corresponding numbers are given below:

[0019] 1. Implant

[0020] 2. Elastoplastic and limited visco-elastic abutment

[0021] 3. Coating a. Protrusion

[0022] Detailed Description of the Invention

[0023] The invention relates to a dental implant assembly with an elastic structure using an elastoplastic and limited visco-elastic abutment (2) between the implant (1) and the crown (3).

[0024] In the application of the dental implant assembly to the patient, a hole is first drilled in the jawbone for the installation of the implant (1). The implant (1) is placed in this hole. Then the elastoplastic and limited visco-elastic abutment (2) is screwed onto the implant (1). Finally, the veneer (3) is glued onto the elastoplastic and limited visco-elastic abutment (2). As can be seen in Figure-2 and Figure-3, the upper part of the elastoplastic and confined viscoelastic abutment

[0025] (2) that contacts the veneer (3) has a radial cut structure and thus contacts the veneer (3) superficially. Because the circumference of the protrusion (a) on the inner surface of the coating

[0026] (3), which contacts the upper surface of the elastoplastic and confined viscoelastic abutment (2), is also radii cut.

[0027] The assembly approaches for the parts of the cladding (3) in Figure 2 and Figure 3 are different. Figure-2 shows a view of an edge-locking dental implant assembly with implant, elastoplastic and limited visco-elastic abutment and crown, while Figure-3 shows a center-locking dental implant assembly with implant, elastoplastic and limited visco-elastic abutment and crown.

[0028] In the structure developed with the invention, a structure has been developed in which rigidity and suspension can be provided by the fact that the inner surface of the coating (3) contacting the upper surface of the elastic abutment (2) is also in a radial cut structure.

[0029] Elastoplastic and limited visco-elastic abutment (2) can be manufactured by machining (such as CNC, lathe) or plastic injection molding in accordance with the model dimensions and material. The parts given in Figure 2 were manufactured by additive manufacturing method, and the assembly fit was checked. No problems were encountered in the assembly compliance and the targeted flexing movement. In addition, finite element analysis was performed with ANSYS and it was seen that the load was homogeneously distributed compared to the existing abutments.

[0030] Subsequently, ethical permissions will be obtained and trials will be conducted on live subjects and the assembly compatibility or biocompatibility process will be followed. It is expected that the plastic material, which has springing properties under the prosthesis, will act as a suspension according to the chewing pressure and, perform the load distribution homogeneously and create a natural tooth effect.

[0031] UHMWPE / PEEK (Polyaryletheretherketone / Ultra High Molecular Weight Polyethylene) material was used for flexion and suspension, which is also in the natural structure of the tooth and occurs for chewing pressure. UHMWPE / PEEK (Polyaryletheretherketone / Ultra High Molecular Weight Polyethylene) is a kind of polymer or plastic material. UHMWPE / PEEK is chemically resistant, tougher and more temperature resistant than low density polyethylene types. Therefore, it is a preferred plastic material for many industrial and commercial applications. It can slowly elongate when under load for a certain period of time, and it can bend or shrink under a certain load, but these deformations can be reversed if they are within elastic limits. These springing and flexing properties can actually mimic the chewing flexibility inherent in the natural structure of the tooth. In this respect, UHMWPE / PEEK offers an alternative to meet the expectations of natural teeth. UHMWPE / PEEK is a material that generally performs well in medium and low temperature applications between -50°C / +90°C in terms of temperature resistance.

[0032] UHMWPE / PEEK (Polyaryletheretherketone / Ultra High Molecular Weight Polyethylene) is generally recognized as a good plastic material in terms of its biocompatibility. It is a chemically stable material and generally does not degrade or react when exposed to body fluids or tissues. This is important for biocompatibility. It is compatible with body tissues and generally does not cause foreign body reactions in the body. This is important in applications such as medical implants and prostheses. It does not contain toxic chemicals and typically does not release toxic substances in the body. This increases its biocompatibility. The biocompatibility of UHMWPE / PEEK material supports its use in many medical applications, such as medical implants, orthopedic prostheses, surgical correctors, and other medical devices. In prosthetic joints, for example, in dental prostheses or other orthoses, it can be preferred for its light weight, durability, biocompatibility and cost-effectiveness.

Claims

CLAIMS1. A dental implant assembly characterized by comprising• an elastoplastic and limited visco-elastic abutment (2) which is screwed onto the implant (1) and on which the coating (3) is adhered after screwing, having a radial cut structure around the protrusion (a) on the inner surface, to ensure a surface compatibility with the coating (3), and having an upper part which is in contact with the coating (3) which has a radii cut structure, to ensure the suspension and rigidity of the dental implant assembly by means of the aforementioned compatibility.

2. A dental implant assembly, according to claim 1, is characterized in that it comprises an elastoplastic and a limited visco-elastic abutment (2) made of polyaryletheretherketone (PEEK).

3. A dental implant assembly according to claim 1, characterized in that it comprises an elastoplastic and a limited viscoelastic abutment (2) made of ultra-high molecular weight polyethylene.

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