WO2020142023A1

WO2020142023A1 - Magnetic dental prosthesis

Info

Publication number: WO2020142023A1
Application number: PCT/TR2019/050469
Authority: WO
Inventors: Ercan Akduruk
Original assignee: Ercan Akduruk
Priority date: 2018-12-31
Filing date: 2019-06-19
Publication date: 2020-07-09

Abstract

The invention is dental prosthesis made of laminate raw material, having mesial contact surface, a distal contact surface and at least a posterior tooth with an occlusal surface, wherein the dental prosthesis comprises an occlusal surface, at least a buccal cusp having a buccal cusp top, at least a lingual cusp having a lingual cusp top, a central fissure with at least a dental cavity, passing through two cusps having an occlusal surface at the mesio-distal direction, a prosthetic tooth inside said cavity, at least a resin filler material in the tooth, described in detail when describing the related agents, and a magnetic element (C) producing magnetic force by means of the gold (Au) or PTFE (pyrolytic graphite) Teflon coating surface that can be differentiated according to the usage of a product described in detail in the related agents list within the resin filling.

Description

MAGNETIC DENTAL PROSTHESIS

The present invention is related to maxillary and/or mandibular based prosthesis and artificial dental prosthesis directed to retaining other dental related components at the induction direction of magnetic force via the force effect, and to artificial dental equipment and various methods thereof and in particularly to methods and apparatus and components that are magnetically retained and have been developed to replace individual prosthesis tooth/teeth similar to bridges.

Magnet applications are used in prosthetic dental treatment nowadays as retaining elements in implant supported overdentures, prostheses with mobile sections, obturators and in chin and face prosthetics. The small sizes of the magnetic means have advantages of providing strong and fixed gravity force, cleaning ease, and they transfer minimal amount of lateral force to the supporting tooth or implant. In orthodontics, the extrusion and intrusion of teeth are used in providing dental motion along arch wires, expansion of the maxillary dental arch, fixing the anterior open bite, functional apparatus and sustaining impacted teeth .

As is known teeth are particularly used to break down food, however they are needed in daily life for speech, teeth have different sections such as the crown which protrudes towards the oral cavity from the gums, tooth neck and the tooth root which can be separated into ends having openings for nerves to pass through. The passage between the tooth root and the tooth crown is called the tooth neck.

The teeth series formed of the upper jaw and the lower jaw: are formed of incisors, canine teeth and posterior teeth, namely the premolars and molars. Premolars are lower in height and have two protruding crowns, molars generally have a large crown structure up to 5 protrusions, the artificial crowns of teeth in dental plates aim to enable functions such as primarily chewing and other functions using complete dentures or completely replaced teeth.

Magnets have a certain static magnetic field (SMA) and when they are used in the oral cavity the surrounding tissue is subjected to this magnetic field in a limited influence area, the intensity of the magnetic flux is defined as Gauss (G), Tesla (T) , weber/meter (Wb/m2), the dental prosthesis having prosthetic magnetism within the scope of protection of the design and intellectual property in protecting the model of the design related to this application, comprises a keeper made of ferromagnetic alloy produced from alkaline earth metals (primarily neodymium, beryllium, strontium or infrequently barium) separated from the Lanthanum series inside the tooth root and this keeper contacts the magnet located in the other prosthesis; at the moment when the keeper is contacted, the magnetic field forces bend along the direction motion of the prosthesis, the force increases exponentially and force is applied at a vertical direction onto the keepers.

This is based on the principle of the system taking back its initial form by the formation of the thrusting force at the top point of the system from the potential force which increases within the magnetic fields regarding the returning of the magnetic tooth prosthesis system to its initial state following this point due to the interference at the point where the maximum load of the jaw muscle force during chewing being applied onto the teeth at the point where the force applied onto the prosthesis is at its highest point.

The prosthetic teeth that have been formed with a distinct occlusal structure, efficient occlusion and by filling the magnetic cavities that have been target processed can be aligned as a result of using either other prosthetics or by a series of operations carried out by the dentist on natural teeth; and the prosthetics are structured with natural chewing surfaces such as in the natural teeth within the scope of the invention.

Dental prosthesis that are magnetically operated are known in the prior art. The patent applications numbered JP2003093408, EP0261041, W09420042 and GB738972 disclose magnetic dental prostheses.

The primary technical problem of said dental prostheses is that the magnetic element can be damaged as a result of factors such as saliva and other organic materials such as water located inside the oral cavity as the magnetic element is open to come into contact with factors in the oral cavity.

Another technical problem is that the magnetic flux is used entirely for locking the prosthesis. A significant amount of the magnetic flux does not affect the elements which enable to lock the prosthesis magnetically and the diffused magnetic current prevents efficient magnetic coupling.

The prostheses known and used in the known state of the art have not found an efficient usage area due to said disadvantages .

Problems to be solved by the Invention

The magnetic element of the invention is coated with various coating materials in order to protect the magnetic element from factors in the oral cavity. By this means the damage that may be received by the magnetic element located inside the oral cavity is prevented.

On the other hand as the surrounding part of the magnetic element is coated with elements which directs magnetic flux or cuts it off, magnetic flux can be directed at higher levels to the locking section of the prosthesis.

By this means the magnetically coupled prosthesis, can be coupled to the section inside the oral cavity more resiliently and the usage life of the prosthesis is extended .

Description of the Figures

Figure 1. Sectional view of the dental prosthesis with magnetic element.

Description of the references in the Figures

A. Enamel

B. Dentine C. Magnetic Element

D. Dental Crown

E. Artificial Prosthesis

Detailed Description of the Invention

The "neuronal contact position" on the tooth within the scope of the invention is the starting and ending point for the targeted spaces to be used during motion (occlusion formation) , all of the movements with the effect of minor magnetic forces created on the chewing surfaces, is mild for the physiological position direction at the central intercuspation (IKP) and this provides relief for all muscle systems directed to all dental movements including joints .

It is possible to carry out all occlusion movements perfectly by means of the dental prosthesis subject to the invention, and this means that the related moment is absorbed when differentiating magnetic materials in which different magnetic moment tensors are used in order to provide successful prosthetic material where the centric jaw relationship, or in other words the force applied physiologically onto the upper jaw by the lower jaw is definitive. Additionally the dental crown (D) coated over the related magnetic element (C) has been embodied naturally and has been coated over the related magnetic element (C) either by fixing the magnet element (C) or by increasing the magnetic force endurance. Moreover the side surfaces of the magnetic element (C) has been coated with gold (Au) or PTFE (Pyrolytic Graphite) Teflon material and by eliminating the interaction of the magnetic structure with the surfaces of the external environment it has been aimed for the magnetic element (C) having magnetic susceptibility to be susceptible only to the related magnetic field direction.

The definition of the side surface mentioned above, describes the surfaces besides those surfaces having the magnetic element (C) formed in order to provide magnetic locking of the prosthesis. According to the effect desired to be provided, any of the surfaces besides the ones where the magnetic element (C) is used for magnetic locking of the prosthesis, can be coated with material such as gold, Teflon etc.

The magnetic locking according to Figure 1, is aimed to be at the vertical axis of the enamel, therefore it is preferred for the magnetic flux and thereby the magnetic attraction to be intensified in this direction. When it is understood that the magnetic flux formed for purposes besides a locking axis, will be dysfunctional in terms of locking, the directing of the magnetic flux towards the locking axis will enable stronger locking.

According to the invention, the closed dentures serve a reciprocally safe centric support for the dentures (regardless of being prosthetic or natural) despite its entire freedom. At the closing phase of the jaw halves, also during the mediotrusive movements, it can be clearly observed that the prosthetic tooth and teeth functions without sliding obstacle occur.

A balancing within the retrospective balancing term between the tooth crown and the tooth root according to the invention can be observed such that a connection line between the border surface of the tooth crown and the tooth root, at the neck of the tooth will be extending outside the tooth body.

According to Figure 1, the magnetic element (C) has been embedded into the dental crown (D) inside the enamel (A) . By this means the dentine (B) can be mounted to the artificial prosthesis (E) .

According preferred embodiment of the invention the inclination radius of the occlusal surface at the base of the dental cavity has been designed to be larger than 1.2mm and smaller than 5mm in all sectional planes runs parallel from the base of the dental cavity to the dental axis.

The magnetic element (C) is produced from alkali earth metals (primarily neodymium, beryllium, strontium, and infrequently barium) which provide the necessary magnetic field in order for the prosthesis to stay in the mouth and the keeper made of ferromagnetic alloy will come into contact with the magnet provided in the other prosthesis. When the keeper is being contacted, the magnetic field forces bend along the motion of the prosthesis and it increases exponentially and this enables force to be applied to the keepers at a vertical direction.

According to preferred embodiment of the invention, the magnetic element (C) used to provide magnetic attraction is placed inside the dental crown (D) made of formaldehyde transparent epoxy (natural resin) or containing formaldehyde transparent epoxy (natural resin) obtained from natural sources to ensure fixing of the magnetic material, or to ensure that the magnetic feature induction is no lost due environmental components.

According to the preferred embodiment of the invention, the magnetic element (C) is completely embedded into the dental crown (D) . However according to different embodiment of the invention a section of the magnetic element (C) can be coated with the dental crown (D) and the remaining sections can be left uncoated or can be coated with different materials .

The dental crown (D) and the magnet element (C) can be formed in different volumes for different tooth structures in different embodiments of the invention.

The technical structure of the prosthesis subject to the invention has been designed such that the inclination radius of the contact surface of the posterior tooth has been curved as a convex shape and that it corresponds to the inclination o the radius of the other contact surface of the neighbouring tooth has been curved in a concave shape .

Figure 1, shows the magnetic element (C) formed as a cylindrical structure. Magnetic elements having different shapes, contents and geometries can be used according to different embodiments of the invention.

Claims

1. An artificial dental prosthesis for retaining by the force effect at the induction direction of the mag netic flux of the maxillary and/or mandibular prosthe- ses and other related prosthetic equipment and having at least a magnetic element (C) within its structure to reach this aim, characterized by comprising a mag netic element (C) whose at least one section is coated with a dental crown (D) which enables to increase the magnetic force endurance and enables fixing of the magnetic element (C) .

2. An artificial dental prosthesis having a magnetic ele ment (C) according to claim 1, characterized by the magnetic element (C) being a magnetic element (C) with any of its surfaces besides the surfaces formed for providing magnetic locking of the prosthesis, being coated with gold and/or Teflon.

3. An artificial dental prosthesis having a magnetic ele ment (C) according to claim 2, characterized by com prising a magnetic element (C) having a cylindrical structure where the side surfaces of said element is coated with gold and/or Teflon.

4. An artificial dental prosthesis having a magnetic ele ment (C) according to claim 1, characterized by com prising a magnetic element (C) that is covered com pletely with a dental crown (D) which enables to in crease the endurance of the magnetic force and the fixation of the magnetic element (C) .

5. An artificial dental prosthesis having a magnetic ele ment (C) according to claim 1, characterized by com prising a dental crown (D) made of formaldehyde trans parent epoxy.

6. An artificial dental prosthesis having a magnetic ele ment (C) according to claim 1, characterized in that he inclination radius of the occlusal surface at the base of the dental cavity is larger than 1.2mm and smaller than 5mm in all sectional planes that run par allel from the base of the dental cavity to the dental axis .

7. An artificial dental prosthesis having a magnetic ele ment (C) according to claim 1, characterized by com- prising a magnetic element (C) formed of neodymium, beryllium, strontium, barium or a mixture thereof.