KR20110003753U - Artificial teeth with combined reinforcement grooves for dentures - Google Patents

Artificial teeth with combined reinforcement grooves for dentures Download PDF

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KR20110003753U
KR20110003753U KR2020090013188U KR20090013188U KR20110003753U KR 20110003753 U KR20110003753 U KR 20110003753U KR 2020090013188 U KR2020090013188 U KR 2020090013188U KR 20090013188 U KR20090013188 U KR 20090013188U KR 20110003753 U KR20110003753 U KR 20110003753U
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denture
groove
tooth
artificial
teeth
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김혜원
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김혜원
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/10—Fastening of artificial teeth to denture palates or the like
    • A61C13/1003—Fastening of artificial teeth to denture palates or the like by embedding in base material
    • A61C13/1006—Fastening of artificial teeth to denture palates or the like by embedding in base material characterised by a tooth shape which improves retention
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/08—Artificial teeth; Making same
    • A61C13/087—Artificial resin teeth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dentistry (AREA)
  • Plastic & Reconstructive Surgery (AREA)
  • Dental Prosthetics (AREA)

Abstract

본고안은 틀니용 인공치아에 있어서, 틀니용 인공치아와 결합보강홈(언더컷트)이 일체로 구성된 인공치아에 관한 것이다.The present invention relates to an artificial tooth in which a denture artificial tooth and a joint reinforcing groove (undercut) are integrally formed.

더욱 상세하게 설명하면, 틀니(의치)를 제작하기 위해 견고하게 결합될수 있도록 인공치아와 일체로 내부의 양측면에 대향지게 원형, 삼각형, 반구형상 등의 다양한 형상을 갖는 결합보강홈(언더컷트홈)이 형성됨을 특징으로 한 것이다.In more detail, the coupling reinforcing groove (undercut groove) having various shapes such as circular, triangular, hemispherical, etc. to be opposed to both sides of the body integrally with the artificial tooth so that it can be firmly combined to make a denture (denture). It is characterized by the formation.

상기, 결합보강홈(언더컷트홈)은, 인공치아의 양측면에 대향지게 내측으로 형성되어 있어 중합체 수지 의치상(치아지지부)에 꽂아 밀착시킨 상태로 결합보강홈(언더컷트홈)으로 중합체의 수지 의치상(치아지지부)의 중합체 수지가 주입되어 완전 결합부착 되는 것이다.The joint reinforcing groove (undercut groove) is formed inward to face both sides of the artificial tooth, and is inserted into the polymer resin denture base (tooth support part) in a state of being brought into close contact with the polymer reinforcement groove (undercut groove). The polymer resin of the (teeth support part) is injected and completely bonded.

이와 같은 상태에서 인공치아와 중합체의 수지 의치상(치아지지부)이 열중합체 이나 광중합체의 공정을 거쳐 보다 견고히 내구성이 향성된 틀니를 갖게 된다.In this state, the artificial denture base (tooth support part) of the artificial tooth and the polymer has a denture that is more firmly durable through the process of thermopolymer or photopolymer.

인공치아, 중합체 수지 의치상(치아지지부), 결합보강홈(언더컷트홈), 일체, 부분틀니, 완전틀니 Artificial teeth, polymer resin denture base (tooth support part), joint reinforcement groove (undercut groove), integral, partial denture, full denture

Description

틀니용 결합보강홈(언더컷트홈)이 구비된 인공치아{omitted}Artificial teeth with combined reinforcement grooves (undercut grooves) for dentures

본고안은 틀니(의치)를 제작하기 위해 견고하게 결합될수 있도록 인공치아와 일체로 내부의 양측면에 대향지게 원형, 삼각형, 반구형상 등의 다양한 형상을 갖는 결합보강홈(언더컷트홈)이 형성됨을 특징으로 한 것이다.In this proposal, the joint reinforcing groove (undercut groove) having various shapes such as circular, triangular, hemispherical, etc. is formed so as to be firmly combined with artificial teeth so as to be firmly combined to make dentures. It is a feature.

결합보강홈(언더컷트홈)의 내부로 중합체의 수지 의치상(치아지지부)이 주입되어 완전 결합되는 틀니용 결합보강홈(언더컷트홈)이 구비된 인공치아에 관한 것이다.The present invention relates to an artificial tooth having denture coupling reinforcement grooves (undercut grooves) in which a resin denture base (tooth support portion) of a polymer is injected into the coupling reinforcement grooves (undercut grooves) and completely engaged.

일반적으로 사람은 상악(上顎) 14개, 하악(下顎) 14개로 총 28개의 치아를 가지며, 특히 유아시기에 생성된 유치가 성장기에 접어들면서 성장치로 교체된후 평생동안 성장치를 이용하여 구강활동을 수행한다.In general, a person has a total of 28 teeth, including 14 upper jaw and 14 lower jaw. Especially, the teeth generated during infancy are replaced with the growth level during the growth phase, and then the oral activity is used for the whole life. Perform.

상기, 성장치의 생성후 각종 구강질병(충치나 잇몸병 등)으로 인해 하나 혹은 그 이상의 치아가 손상되는 경우가 발생하고, 치아 상실로 인해 저작 효율의 감소로 소하기능이 저하되어 많은 다른질환을 유발할 수 있으며, 치아교합의 불균형으로 악관절 손상 등에 의해 척추의 반곡이나 신경통 등이 심해질 수 있다.After the generation of the growth value, various oral diseases (cavities or gum disease, etc.) may occur when one or more teeth are damaged. It can cause, and due to the imbalance of teeth occlusal, the bending of the spine, neuralgia, etc. may be severe.

또한, 오랫동안 치아가 상실된채로 있게 되면 입주위의 근육이 수축 또는 변 형되어 얼굴형태가 변하기 때문에 나중에 원래의 모습으로 회복하기가 쉽지 않게 되므로 사회생활을 정상적으로 유지하지 못하는 경우가 발생하게 된다.In addition, if the teeth are lost for a long time, the muscles around the mouth are contracted or deformed, so the shape of the face changes, so that it is not easy to recover the original shape later.

따라서, 손상된 치아를 복원하기 위한 방안의 하나로 임플란트 시술과 틀니를 이용한 구조물의 적용이 수행되고 있다.Therefore, application of a structure using an implant procedure and a denture is performed as one of the methods for restoring the damaged tooth.

이와 같은 임플란트시술은, 고가의 치료비용 뿐만 아니라 잇몸의 상태에 따라 인공뿌리를 심거나 잇몸뼈(턱뼈)에 구멍을 뚫고 인공기둥을 세워야 하는 대수술이 요구되어 정상적으로 회복되기까지는 많은시간이 소요되므로 보통으로는 틀니가 사실상 적용되는 실정이다.Such implants are not only expensive treatment costs, but also require large surgery to plant artificial roots or pierce holes in the gum bone (jawbone) and erect artificial columns, depending on the condition of the gum. As it is, the denture is actually applied.

상기, 틀니는 부분틀니와 완전틀니가 있다.The denture has partial and complete dentures.

또한 틀니는 잇몸 닿는부분, 치아에 힘을 받는부분, 저작부분 등의 치아 기능부분을 세부분으로 나눈다.In addition, the denture divides the functional parts of the teeth, such as the areas where the gum touches, the areas under the tooth, and the chewing part.

이러한 부분틀니는, 잇몸체에 남아 있는 본치아를 이용해 빠진부분을 보충하기 위한 것이고, 완전틀니는 잇몸체에 본치아가 한개도 남아 있지 않을 경우 잇몸체의 지지만으로 이용된다.These partial dentures are used to replenish the missing parts using the remaining teeth on the gums, and the complete dentures are used only as the support of the gums when no teeth are left on the gums.

또한 틀니는 양측 가장자리에 구비된 의치 본체 및 의치상(치아 지지부)은 금속재의 구조물로 상호결합되고, 보통은 레진(수지)이라는 중합체를 이용하여 잇몸 형상으로 성형된다.In addition, the denture main body and the denture base (tooth support part) provided at both edges of the denture are mutually joined by a metal structure, and are usually formed into a gum shape using a polymer called resin (resin).

이와 같은 틀니를 제작하기 위해서는 중합체 상태인 수지 의치상(치아지지부)에 인공치아의 전치와 구치 등을 환자의 구강구조에 적합하게 배열하여 그대로 완전 결합 밀착시킨다.In order to produce such dentures, the tooth dentures and the posterior teeth of the artificial teeth are arranged in a polymer resin denture (tooth support) suitable for the oral structure of the patient, and then completely bonded to each other.

상기와 같이 인공치아의 전치 또는 구치를 환자의 구강상태에 따라 의치상(치아지지부)에 배열하여 중합되는 과정을 거쳐 제작된 틀니는, 음식물을 자르거나 씹는 등의 저작과정 중에 의치상(치아지지부)에 인공치아가 결합이 잘 되지 않고 쉽게 이탈되는 문제점이 있었다..As described above, the dentures produced by arranging the anterior teeth or posterior teeth of the artificial teeth on the denture base (tooth support part) according to the oral state of the patient are polymerized on the denture base (tooth support part) during the chewing process such as cutting or chewing food. There was a problem that the artificial teeth are not easily combined and detached.

그 이유로는, 인공치아나 의치상(치아지지부)의 주성분이 포리우레탄이나 수지 재질로 되는데 의치상(치아지지부)과 인공치아의 재질이 다를경우 결합이 잘 되지 않을뿐 아니라, 인공치아의 표면이 매끄러운 상태로 되어 있어서 중합체 수지 의치상(치아지지부)에 표면만 접착한 상태에서 밀착 중합되는 과정만을 거치기 때문에 결합보강 장치가 없는 한 엿, 떡 등 찰진 음식물의 저작 과정에서 쉽게 이탈되는 문제점이 있다.For this reason, the main component of artificial teeth or denture bases is made of polyurethane or resin. If the materials of different denture bases and artificial teeth are different, they will not be combined well. Since only the surface is adhered to the polymer resin denture base (tooth support part) in the state of adhesive bonding, there is a problem that it is easily detached from the chewing process of cracked food such as malt, rice cake, etc., unless there is a bond reinforcing device.

상기의 문제점을 해결하기 위하여, 본고안은 음식물을 자르거나 씹는 등의 저작과정에서 인공치아가 중합체 수지 의치상(치아지지부)에서 쉽게 이탈되지 않도록 인공치아 내부의 양측면에 대향지게 결합보강홈(언더컷트홈)을 인공치아와 일체로 형성한다.In order to solve the above problems, the present proposal is to provide a joint reinforcing groove (undercut) opposite to both sides of the artificial tooth so that the artificial tooth is not easily separated from the polymer resin denture base (tooth support part) during the chewing process such as cutting or chewing food. Groove) is formed integrally with the artificial tooth.

상기의 인공치아와 일체로 된 결합보강홈(인더컷트홈)은, 원형, 삼각형, 반구형상 등의 다양한 형태의 변형 가능한 홈으로 형성한다.Coupling reinforcing groove (in the cut groove) integrated with the artificial tooth is formed into a variety of deformable grooves, such as circular, triangular, hemispherical.

이러한 인공치아와 일체인 결합보강홈(언더컷트홈)의 내부로 중합체 상태인 수지 의치상(치아지지부)이 주입되어 인공치아와 중합체 수지 의치상(치아지지부)이 함께 완전 결합되어 열중합 이나 광중합 등의 공정을 거치면 향상된 내구성을 갖는 틀니용 결합보강홈(언더컷터홈)이 구비된 인공치아를 제공한다.The resin denture base (tooth support part) in a polymer state is injected into the coupling reinforcement groove (undercut groove) integrated with the artificial tooth, and the artificial tooth and the polymer resin denture base (tooth support part) are completely combined together, such as thermal polymerization or photopolymerization. Through the process provides an artificial tooth provided with a joint reinforcement groove (under cutter groove) for improved dentures.

여기서 의치상(치아지지부)는 말랑 말랑한 상태의 중합체 수지로 이루어진다.The denture base (teeth support part) is made of a polymer resin in a soft state.

이상에서 설명한 바와 같이, 본고안은 의치상(치아지지부)에 인공치아를 배열 또는 중합시키는 과정에서, 인공치아와 일체로 내면의 양측면에 대향지게 형성된 결합보강홈(언더컷트홈) 으로 중합체의 수지 의치상(치아지지부)이 주입되어 완전 결합한 상태에서 열중합 이나 광중합 등의 공정을 거치면 견고하게 밀착되어 음식물을 씹거나 자르는 등의 저작 과정에서 인공치아가 이탈 되지 않는 우수한 내구성을 갖는 효과가 있다.As described above, in the present invention, in the process of arranging or polymerizing an artificial tooth on a denture base (tooth support part), the resin denture base of the polymer is formed as a joint reinforcing groove (undercut groove) formed integrally with both sides of the inner surface of the artificial tooth. When (tooth support) is injected and fully bonded, it undergoes a process such as thermal polymerization or photopolymerization, so it is firmly adhered and has an excellent durability that does not detach artificial teeth during chewing or cutting of food.

이하, 첨부된 도면에 의해 본고안을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 1 은 본고안 인공치아중 구치인 어금니를 도시해 보인 사시도이고,1 is a perspective view showing the molars which are the posterior teeth of the artificial tooth of the present invention,

도 2 는 본고안 인공치아중 구치인 어금니를 도시해 보인 단면도이다.2 is a cross-sectional view showing the molars which are the posterior teeth of the artificial teeth of the present invention.

본고안을 전치와 구치로 구분되는 인공치아(1)중 구치를 예를 들어 설명하면, 인공치아(1)의 내부의 양측에 대향지게 결합보강홈(언더컷트홈)(2)이 인공치아(1)와 일체로 형성된 구조이다.If the present invention is described with an example of the posterior tooth of the artificial tooth (1) divided into anterior teeth and the posterior teeth, the coupling reinforcing groove (undercut groove) (2) is opposed to both sides of the inside of the artificial tooth (1) artificial teeth ( It is a structure formed integrally with 1).

상기 결합보강홈(언더컷트홈)(2)은 소정의 깊이 만큼 수평하게 형성되어 의 치상(치아지지부)(3)에 인공치아(1)을 꽂은 상태에서 밀착하면 언더컷트홈(2)으로 중합체 수지 의치상(치아지지부)(4)이 주입되어 함께 완전 결합되어 견고하게 유지된 상태를 잡아준다.The coupling reinforcing groove (undercut groove) (2) is formed horizontally by a predetermined depth is in close contact with the artificial tooth (1) in the state of inserting the artificial tooth (1) to the teeth (tooth support) (3) of the polymer into the undercut groove (2) The resin denture base (teeth support part) 4 is injected and fully bonded together to hold the state held firmly.

도 3 은 본고안 인공치아의 결합보강홈(언더컷트홈)의 또 다른 형상을 보인 단면도로써, 결합보강홈(언더컷트홈)(2)을 원형 대신 삼각형 형태 등으로 브이커팅되어 결합보강홈(언더컷트홈)(2)으로 된 구조이다.3 is a cross-sectional view showing another shape of the coupling reinforcement groove (undercut groove) of the artificial tooth of the present invention, the coupling reinforcement groove (undercut groove) (2) in the form of a triangular instead of a circular reinforcement groove ( Undercut groove) (2).

상기 결합보강홈(언더컷트홈)(2)은, 원형, 삼각형, 반구형상으로 한정하는게 아니라 다양한 형태로 변형 가능하여도 동일한 효과를 얻을 수 있다.The coupling reinforcing groove (undercut groove) (2) is not limited to a circular, triangular, hemispherical shape, but can be obtained in the same form even if it can be modified in various forms.

도 4 는 본고안 인공치아의 실시예를 도시해 보인 단면도로써, 본고안 중합체 수지 의치상(치아지지부)(3)에 환자의 구강구조에 따라 결합보강홈(언더컷트홈)(2)이 일체로 구비된 인공치아(1)을 꽂아서 밀착하면 중합체 수지 의치상(치아지지부)(3)이 결합보강홈(언더컷트홈)(2)으로 주입된다.4 is a cross-sectional view showing an embodiment of the artificial tooth of the present invention, the joint reinforcing groove (undercut groove) (2) integrally in accordance with the oral structure of the patient on the polymer resin denture base (tooth support) (3) When the provided artificial teeth 1 are plugged in close contact, the polymer resin denture base (teeth support part) 3 is injected into the coupling reinforcing groove (undercut groove) 2.

즉, 인공치아(1)와 일체로 내면의 양측에 대향지게 형성된 결합보강홈(언더컷트홈)(2)에 중합체 수지 의치상(치아지지부)(3)의 수지(4)가 인공치아(1)의 내측홈인 결합보강홈(언더컷트홈)(2)으로 주입되어 완전 결합하면 밀착상태가 견고하게 된다.That is, the resin 4 of the polymer resin denture base (teeth support part) 3 is formed in the joint reinforcing groove (undercut groove) 2 formed integrally with the artificial tooth 1 on both sides of the inner surface. When the inner groove of the coupling reinforcing groove (undercut groove) (2) is completely inserted into the tight state of contact.

따라서, 본고안은 별도의 보강장치 없이 인공치아(1)의 자체에 형성된 홈만으로 결합 상태가 견고하게 잡아주므로 진보 향상된 구성이다.Therefore, the present design is an advanced and improved configuration because the combined state is firmly held only by the groove formed in the artificial tooth 1 itself without a separate reinforcement device.

도 5 는 본고안 인공치아를 사용하여 부분틀니(5)를 도시해 보인 사시도이다.Fig. 5 is a perspective view showing the partial denture 5 using the artificial teeth of the present invention.

본고안 치아 결손부위를 복구하기 위한 부분틀니(5)로 인공치아(1)과 의치상(치아지지부)(3)에 구성되며, 각각의 인공치아(1)는 내부의 양측에 형성된 각각의 결합보강홈(언더컷트홈)(2)과 각각 일체로 형성 배열되어 중합체 상태인 수지 의치상(치아지지부)(3)에 꽂아 밀착시키면, 각각의 인공치아(1)의 각각의 결합보강홈(언더컷트홈)(2)으로 중합체 수지 의치상(치아지지부)(3)의 수지(4)가 주입되어 인공치아(1)와 수지 의치상(치아지지부)에 각각 밀착 연결한다.The artificial teeth 1 and the denture base (teeth support part) 3 are partial dentures 5 for restoring the tooth defects of the present invention, and each artificial tooth 1 is formed with respective joint reinforcement formed on both sides of the inner tooth. When each of the grooves (undercut grooves) 2 are formed integrally with each other and inserted into the resin denture base (teeth support part) 3 in a polymer state to be in close contact with each other, each coupling reinforcement groove (undercut groove) of each artificial tooth 1 Resin 4 of the polymer resin denture base (teeth support part) 3 is injected into (2), and is closely connected to the artificial tooth 1 and the resin denture base (teeth support part), respectively.

도 6 은 본고안 인공치아를 사용하여 전체틀니를 도시해 보인 사시도이다.6 is a perspective view showing the entire denture using the artificial teeth of the present invention.

본고안은 중합체 수지 의치상(치아지지부)(3)의 상단부에 각각의 인공치아(1)인 전치와 구치를 배열하여 중합체 수지 의치상(치아지지부)(3)에 꽂아 밀착 연결한 상태에서 각각의 인공치아(1)와 일체로 내면의 양측에 형성된 결합보강홈(언더컷트홈)(2)에 중합체 수지 의치상(치아지지부)(3)의 수지(4)가 주입되어 밀착 연결되어 완전 결합한다.In this proposal, each artificial tooth (1) anterior teeth and a posterior tooth are arranged on the upper end of the polymer resin denture base (tooth support part) 3 and inserted into the polymer resin denture base (tooth support part) 3 so as to be in close contact with each artificial person. The resin 4 of the polymer resin denture base (teeth support part) 3 is injected into the coupling reinforcing groove (undercut groove) 2 formed on both sides of the inner surface integrally with the tooth 1, and is closely connected to each other.

특히, 사람에 따라 전치와 구치의 형상은 각각 약간씩 다르나 상기의 결합보강홈(언더컷트홈)(2)을 인공치아(1)와 일체로 내면의 양측면에 대향지게 형성함으로써 인공치아(1) 자체에 형성된 홈만으로 밀착하여 완전 결합한다.In particular, the shape of the anterior teeth and the posterior tooth slightly different depending on the person, but the artificial reinforcing teeth (1) by forming the coupling reinforcement grooves (undercut grooves) 2 opposite to both sides of the inner surface integrally with the artificial teeth 1 Only the grooves formed in the close contact is completely combined.

이와 같은 밀착 완전 결합하는 상태에서 열중합 이나 광중합 등의 공정을 거치면 더욱 견고하게 고정된다.In such a tightly coupled state, it is more firmly fixed through a process such as thermal polymerization or photopolymerization.

이상과 같이 된 인공치아(1)은 부분틀니(5)나 전체틀니(6)로 구성되어 잇몸에 고정하기 위해서는 치과 틀니용 접착제로 다시 도포한 상태에서 틀니(5)(6)를 잇몸에 고정 부착 사용한다.Artificial teeth (1) as described above is composed of a partial denture (5) or full denture (6) in order to fix to the gums fixed in the gums denture (5) (6) in the state of re-applied with a dental denture adhesive Use attached.

도 1 은 본고안 인공치아를 도시해 보인 사시도1 is a perspective view showing an artificial tooth of the present invention

도 2 는 본고안 인공치아를 도시해 보인 단면도2 is a cross-sectional view showing the artificial tooth of the present invention.

도 3 은 본고안 인공치아의 다른 실시예를 도시해 보인 단면도3 is a cross-sectional view showing another embodiment of the artificial tooth of the present invention

도 4 는 본고안 인공치아의 실시예를 도시해 보인 단면도4 is a cross-sectional view showing an embodiment of the artificial tooth of the present invention

도 5 는 본고안 인공치아를 사용하여 부분틀니를 도시해 보인 사시도5 is a perspective view showing a partial denture using an artificial tooth of the present invention;

도 6 은 본고안 인공치아를 사용하여 전체틀니를 도시해 보인 사시도6 is a perspective view showing the entire denture using the artificial tooth of the present invention

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

1 : 인공치아 2 : 언더컷트홈1: artificial tooth 2: undercut groove

3 : 중합체 수지 의치상(치아지지부)3: polymer resin denture base (tooth support part)

4 : 중합체 수지4: polymer resin

5 : 부분틀니 6 : 전체틀니5: partial denture 6: full denture

Claims (2)

틀니용 인공치아에 있어서,In denture artificial teeth, 틀니용 인공치아(1)와 일체로 내면의 양측면에 대향지게 결합보강홈(언더컷트홈)(2)이 형성된 것을 특징으로 하는 틀니용 결합보강홈이 구비된 인공치아.Denture artificial teeth with a denture coupling reinforcement groove, characterized in that the coupling reinforcement groove (undercut groove) (2) formed integrally with both sides of the inner surface integrally with the denture artificial tooth (1). 제 1 항에 있어서,The method of claim 1, 상기의 결합보강홈(언더컷트홈)(2)의 형상이 원형, 삼각형, 반구형 등의 다양한 모양형태로 됨을 특징으로 하는 틀니용 결합보강홈이 구비된 인공치아.The artificial reinforcing teeth provided with a coupling reinforcing groove for dentures, characterized in that the shape of the coupling reinforcing groove (undercut groove) (2) is in the shape of a variety of shapes, such as circular, triangular, hemispherical.
KR2020090013188U 2009-10-09 2009-10-09 Artificial teeth with combined reinforcement grooves for dentures KR20110003753U (en)

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