WO2018220970A1 - Prothèse dentaire partielle - Google Patents

Prothèse dentaire partielle Download PDF

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Publication number
WO2018220970A1
WO2018220970A1 PCT/JP2018/012329 JP2018012329W WO2018220970A1 WO 2018220970 A1 WO2018220970 A1 WO 2018220970A1 JP 2018012329 W JP2018012329 W JP 2018012329W WO 2018220970 A1 WO2018220970 A1 WO 2018220970A1
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WO
WIPO (PCT)
Prior art keywords
dentition
engaging
engagement member
tooth
partial denture
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Application number
PCT/JP2018/012329
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English (en)
Japanese (ja)
Inventor
重村宏
Original Assignee
重村宏
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP2017107337A external-priority patent/JP6239180B1/ja
Priority claimed from JP2017116669A external-priority patent/JP6239181B1/ja
Priority claimed from JP2017138750A external-priority patent/JP6239182B1/ja
Priority claimed from JP2017210274A external-priority patent/JP2018202125A/ja
Priority claimed from JP2017210276A external-priority patent/JP2019017971A/ja
Priority claimed from JP2017210275A external-priority patent/JP2019000615A/ja
Application filed by 重村宏 filed Critical 重村宏
Publication of WO2018220970A1 publication Critical patent/WO2018220970A1/fr

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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
    • A61C13/225—Fastening prostheses in the mouth
    • A61C13/273—Fastening prostheses in the mouth removably secured to residual teeth by using bolts or locks

Definitions

  • the present invention relates to a removable partial denture.
  • This application is the priority of Japanese Patent Application No. 2017-107337, Japanese Patent Application No. 2017-116669, Japanese Patent Application No. 2017-138750, Japanese Patent Application No. 2017-210274, Japanese Patent Application No. 2017-210275, and Japanese Patent Application No. 2017-210276. And is incorporated herein by reference.
  • a partial denture has been used for a long time as a dental prosthesis for partially missing teeth. Later, crown bridges and implants have also been used. Various dental prostheses have been proposed in view of user convenience, and those described in Patent Documents 1 to 5 are examples of partial dentures.
  • Partial dentures are artificial denture bases with artificial teeth that are placed on the alveolar ridge in the missing part of the dentition.
  • the occlusal force applied to the artificial teeth acts on the gums (mucous membrane) of the alveolar ridge. It is like that. Therefore, partial dentures have a problem that hard foods that require a strong bite force cannot be eaten.
  • some partial dentures are provided with a clasp that engages with the remaining teeth in order to apply a partial occlusal force to the remaining teeth and stabilize the attachment of the dentures.
  • the occlusal force acts on both the flexible gingiva and the remaining tooth that is difficult to move, and the load is unbalanced. Therefore, the burden on the remaining tooth is large, and the life of the remaining tooth is shortened. There is a problem.
  • the crown bridge is a device in which crowns formed integrally on both sides of the artificial tooth are put on the remaining teeth positioned before and after the missing part of the dentition. Therefore, in the crown bridge, in order to cover the remaining tooth with the crown, there is a problem that the healthy remaining tooth must be cut by the thickness of the crown.
  • Implant is an artificial tooth rooted in the alveolar bone, and the artificial tooth is fixed to the upper end of the artificial tooth root. Therefore, in an implant, in order to plant an artificial dental root in an alveolar bone, there exists a problem that a gum is cut and the alveolar bone must be cut. In addition, unlike the natural tooth root, the artificial tooth root is directly planted in the alveolar bone without going through the periodontal ligament. Therefore, the implant has a problem that an appropriate cushioning property cannot be obtained. Furthermore, in the implant, there is no protective mechanism against plaques in the surrounding mucous membranes and bacteria in the oral cavity.
  • the present invention has been made in view of such circumstances, and does not involve cutting of residual teeth or alveolar bone like a crown bridge or an implant, and is mounted without using a denture base like a partial denture. It is an object of the present invention to provide a partial denture that can be removed.
  • the partial denture according to the first invention is An artificial tooth placed in the missing part of the dentition, A pair of engaging members configured to support the artificial teeth and be configured to be openable and closable; in the open state, the tooth rows are inserted and separated; and in the closed state, the teeth are engaged from the inside and the outside; A lock structure for releasably fixing the closed state of the pair of engagement members, At least one of the pair of engaging members includes a first engaging portion that engages with an inclined portion that inclines in a direction that widens toward the tooth root of each of the plurality of teeth in the dentition. And a second engaging portion that engages with an undercut portion that is inclined to the opposite side of the inclined portion of at least one tooth in the dentition.
  • the partial denture according to the second invention is An artificial tooth placed in the missing part of the dentition, An inner engaging member that supports the artificial tooth and engages the inside of the dentition; It is connected to the inner engagement member or artificial tooth, has elasticity, and elastically deforms in a direction away from the inner engagement member, thereby enabling insertion of a tooth row between the inner engagement member and the inner engagement member.
  • the inner engagement member includes a first engagement portion that engages with an inclined portion that is inclined in a direction that widens toward the root of each of the plurality of teeth in the dentition,
  • the outer engaging member includes a second engaging portion that engages with an undercut portion that is inclined to the opposite side of the inclined portion of at least one tooth in the dentition.
  • the partial denture according to the third invention is An artificial tooth placed in the missing part of the dentition, An engaging member that supports the artificial tooth and is deformable into a first state that engages inside the dentition in an arch shape and a second state that bends so that the width is narrowed; A lock structure for releasably fixing the first state,
  • the engaging member includes a first engaging portion that engages an inclined portion that inclines in a direction that expands toward the root of each of the plurality of teeth in the dentition, and each of the plurality of teeth in the dentition.
  • a second engaging portion that engages with an undercut portion that is inclined to the opposite side of the inclined portion is provided.
  • FIG. 1 is a view showing an upper jaw model imitating an upper jaw to which a partial denture according to 1 of Application Example 1 of the first present invention is attached
  • FIG. 1 (a) is a side view of the upper jaw model
  • 1B is a perspective view of the left half of the upper jaw model as viewed from the lower jaw side
  • FIG. 1C is a plan view of the left half of the upper jaw model as viewed from the lower jaw side
  • Fig. 2 is a diagram showing a partial denture according to 1 of the application example 1, in which Fig. 2 (a) is a plan view of the partial denture in a closed state as seen from the lower jaw side, and Fig. 2 (b) is FIG.
  • FIG. 2C is a plan view of the partial denture in the open state as viewed from the lower jaw side
  • FIG. 2C is a plan view of the partial denture in the open state as viewed from the upper jaw side
  • FIG. 2D is a plan view of FIG. It is the sectional view on the AA line of FIG.2 (c).
  • 3 is a view showing a state in which the partial denture according to 1 of the application example 1 is attached to the upper jaw model
  • FIG. 3A is a side view corresponding to FIG. ) Is a perspective view corresponding to FIG. 1B
  • FIG. 3C is a plan view corresponding to FIG. FIG.
  • FIG. 4 is an explanatory diagram illustrating a procedure for mounting the partial denture according to 1 of the application example 1 on the dentition, and is a diagram illustrating a state in which an inner engagement member is engaged with the inner side of the dentition.
  • FIG. 5 is a diagram illustrating the state where the partial denture is closed and attached to the dentition.
  • FIG. 6A is a diagram showing an upper jaw model simulating the upper jaw to which the partial denture according to 2 of application example 1 of the first present invention is attached, and is a plan view of the upper jaw model seen from the lower jaw side.
  • FIG. 6B is a view showing a state in which the partial denture according to 2 of the application example 1 is attached to the upper jaw model, and is a plan view corresponding to FIG.
  • FIG. 7A is a diagram showing an upper jaw model simulating the upper jaw to which the partial denture according to 3 of the first application example 1 of the present invention is attached, and the left half of the upper jaw model is viewed from the lower jaw side.
  • FIG. 7B is a perspective view corresponding to FIG. 7A, showing a state in which the partial denture according to 3 of Application Example 1 is attached to the upper jaw model.
  • FIG. 8A is a view showing a state in which the partial denture according to 3 of the application example 1 is attached to the upper jaw model, and is a perspective view of the left half of the upper jaw model seen from the lower jaw side, FIG.
  • FIG. 9A is a plan view of an upper jaw model simulating the upper jaw to which the partial denture according to 1 of Application Example 2 of the second present invention is attached
  • FIG. 9B is the same as FIG. It is a figure which shows the state which mounted
  • FIG. 10A is a perspective view of the upper jaw model viewed from the right side of the lower jaw, and FIG.
  • FIG. 10B is a view showing a state in which the partial denture according to 1 of the application example 2 is attached to the upper jaw model.
  • FIG. 11 is a plan view corresponding to FIG. 11A is a perspective view of the upper jaw model as viewed from the left side of the lower jaw
  • FIG. 11B is a view showing a state in which the partial denture according to 1 of the application example 2 is attached to the upper jaw model.
  • FIG. 12 is a plan view corresponding to FIG. 12A is a perspective view of the partial denture according to 1 of the application example 2 as seen from the front side
  • FIG. 12B is a plan view of the partial denture according to 1 of the application example 2 as seen from the upper jaw side. It is.
  • FIG. 14 (a) is a plan view of an upper jaw model simulating the upper jaw to which the partial denture according to 1 of Application Example 3 of the third present invention is attached, and FIG. 14 (b) is the same as FIG. It is a figure which shows the state which mounted
  • 15A is a front view of the upper jaw model as viewed from the front, and FIG.
  • FIG. 15B is a view showing a state in which the partial denture according to 1 of Application Example 3 is attached to the upper jaw model. It is a front view corresponding to (a).
  • 16A is a perspective view of the upper jaw model viewed from the right side of the lower jaw
  • FIG. 16B is a view showing a state in which the partial denture according to 1 of the application example 3 is attached to the upper jaw model. It is a perspective view corresponding to 16 (a).
  • FIG. 17A is a plan view of the partial denture according to 1 of the application example 3 in the mounted state (first state) as seen from the lower jaw side
  • FIG. 17B is a bent state (second state).
  • FIG. 18A is a cross-sectional view of a partial denture according to 1 of Application Example 3 at a location corresponding to the line AA in FIG. 14B, and FIG. 18B is a cross-sectional view of B in FIG. 14B.
  • FIG. 18C is a cross-sectional view of the partial denture according to 1 of the same application example 3 at a location corresponding to the line B, and FIG. 18C shows the partial denture according to 1 of the same application example 3 in the bent state (second state).
  • FIG. 19 is a cross-sectional view corresponding to FIG. 19A is a cross-sectional view taken along line BB of FIG.
  • FIG. 20A is a plan view showing a state in which the first engaging member of the partial denture according to 1 of Application Example 3 in the bent state (second state) is engaged with the inside of the dentition;
  • FIG. 20B is a plan view showing a state where the second engagement member rotates to engage with the inside of the dentition and the partial denture according to 1 of the application example 3 is attached to the dentition. .
  • ⁇ Application example 1> ⁇ 1 of Application Example 1>
  • a first specific example (part 1 of application example 1) of the partial denture according to application example 1 will be described with reference to FIGS.
  • the partial denture according to 1 of the application example 1 is attached to the upper dentition.
  • an upper jaw model imitating the upper jaw is used and this is considered as an actual upper jaw. .
  • the partial denture 1 according to the first application example 1 is for prosthetic restoration of the missing part 51 of the left and right No. 5 molars, and the left incisor 52 of the left No. 1 is used. Except for the left incisor 53, the left third canine 54, the left fourth molar 55, and the left seventh molar 58.
  • the partial denture 1 supports the artificial tooth 10 disposed in the defect part 51 and the artificial tooth 10 and is configured to be openable and closable. In the open state, the dental dentition is inserted and separated, and in the closed state, the dentition And a pair of engaging members 20 and 30 engaged from the inside and the outside.
  • Inner side means the side where the tongue is located (tongue side) when the teeth are used as a reference
  • outer side means the front teeth (one or two incisors) when the teeth are used as a reference.
  • 3 canine teeth it refers to the side with the lips (lip side)
  • the back teeth (4th to 7th molars) refers to the side with the cheeks (cheek side).
  • the artificial tooth 10 is divided at the dividing surface 11 into a first divided body 12 and a second divided body 13, and the first divided body 12 and the second divided body 13 coincide with the artificial tooth 10. Become.
  • the two adjacent molars on the left side and the left side are missing, and the artificial tooth 10 is provided with these two teeth integrally. Therefore, each of the 1st division body 12 and the 2nd division body 13 is provided corresponding to two adjacent molars of the left side 5th and the left side 6th.
  • the first divided body 12 includes a lateral surface 12a on the occlusion side, a lateral surface 12b on the root side in a shape along the alveolar ridge in the defect portion 51 on the side opposite to the lateral surface 12a on the occlusion side, and an artificial tooth 10
  • a base portion 12A having an inner side surface 12c and an upright surface 12d opposite to the inner side surface 12c of the artificial tooth 10 is provided.
  • the “occlusion side” means the side closer to the incision in the occlusion direction (vertical direction) if it is an anterior tooth, and the occlusal surface (the surface where the upper dentition and the lower dentition are engaged with each other if it is the back tooth. More specifically, it means a side close to the surface between the raised cusps at the top of the tooth), and “the root side” means the side away from the incision and the occlusal surface.
  • the second divided body 13 includes a first divided surface including an occlusal surface 13a of the artificial tooth 10 and a lateral surface 12a on the occlusal side of the first divided body 12 opposite to the occlusal surface 13a of the artificial tooth 10.
  • An occlusal portion 13A having a lateral surface 13b on the root side that forms 11a, an outer surface 13c of the artificial tooth 10, and an elevation surface 12d of the first divided body 12 on the opposite side of the outer surface 13c of the artificial tooth 10.
  • an outer portion 13B having an upright surface 13d that forms the second divided surface 11b, and has an L shape in a cross-sectional view.
  • the second divided body 13 is laminated on the base portion 13C, which is a portion excluding the surface layer of the occlusal portion 13A and the outer portion 13B, and is laminated on the base portion 13C, and has a white color that is the same color as the teeth, and is visible on the external appearance. It is a laminated structure with the well-known coating part 13D. Therefore, the occlusal surface 13a of the artificial tooth 10 and the outer surface 13c of the artificial tooth 10 are outer surfaces of the coating portion 13D, and the lateral surface 13b and the standing surface 13d on the root side are inner surfaces of the base portion 13C.
  • the first divided body 12 and the second divided body 13 having such a configuration are matched so that the first divided surface 11a and the second divided surface 11b are combined.
  • the artificial tooth 10 having the inner surface 12c, the outer surface 13c of the second divided body 13 and the occlusal surface 13a as main surfaces is configured.
  • the lock structure 14 is formed on one of the rising surfaces 12d of the first divided body 12 or the rising surface 13d of the second divided body 13 and on the other rising surface. And engaging protrusions.
  • the engaging projection is elastically deformed into the engaging concave portion and is locked.
  • the 1st division body 12 and the 2nd division body 13 isolate
  • the first divided body 12 is provided integrally with the inner engagement member 20, and the second divided body 13 is provided integrally with the outer engagement member 30.
  • the inner engagement member 20 includes arm portions 21 and 22 extending from the first divided body 12 to the mesial and distal directions, and the outer engagement member 30 is closer to the second divided body 13. Arms 31 and 32 extending in the center and in the distal direction are provided.
  • “middle” means the direction approaching the midline (between the first incisor on the right side and the first incisor on the left side), and “centrifugal” means the direction away from the midline.
  • the mesial side arm portion 21 of the inner engagement member 20 has three adjacent teeth of the left second incisor 53, the left third canine 54, and the fourth left molar 55.
  • the distal side arm portion 22 of the inner engaging member 20 is engaged with the inner side of the left-side No. 7 molar 58 and a part on the distal side. It has a possible bent shape.
  • the mesial side arm portion 31 of the outer engagement member 30 has three adjacent teeth of the left second incisor 53, the left third dog tooth 54, and the left fourth molar 55.
  • the distal side arm portion 32 of the outer engagement member 30 is engaged with the outer side of the left seventh molar 58 and the other side of the distal side. It has a bendable shape.
  • the pair of engaging members 20 and 30 are rotatably connected by hinge portions 40 provided at the distal end portions of the distal sides of the centrifugal side, that is, the distal end portions of the respective arm portions 22 and 32 on the distal side.
  • a pair of engaging members 20 and 30 are comprised so that opening and closing is possible in the open state which spaces apart so that a tooth row can be inserted, and the closed state which engages a tooth row from the inside and the outside.
  • the hinge part 40 is formed so that the pair of engaging members 20 and 30 do not open more than a predetermined angle (FIGS. 2B and 2C show the maximum opening angle). .
  • the inner engaging member 20 includes first engaging portions 23,... That engage with inclined portions that are inclined so as to extend toward the root of each corresponding tooth, and on the opposite side of the inclined portion.
  • gear with the undercut part which inclines is provided with the 2nd engaging part 24 and ... engaged with the said undercut part.
  • the inner engagement member 20 corresponds to the teeth of the left second incisor 53, the left third canine 54, the left fourth molar 55, and the left seventh molar 58.
  • the second engaging portion 24 is provided for each of the left third canine tooth 54, left left fourth molar 55 and left seventh molar 58 having the first engaging portion 23 and having an undercut portion. Is provided.
  • the outer engaging member 30 includes second engaging portions 34 that engage with the undercut portion.
  • the outer engagement member 30 is composed of the left second incisor 53, the left third canine 54, the left fourth molar 55 and the left seventh molar 58 having an undercut portion.
  • a second engaging portion 34 is provided for each tooth.
  • the inner engagement member 20 includes a concave portion 25 having a shape along the inner surface of each tooth.
  • the first engagement portion 23 is formed on the occlusal side (lower side in the drawing) of the recess 25.
  • the second engagement portion 24 is formed on the tooth root side (the upper side in the drawing) of the recess 25.
  • the inner engagement member 20 is in a state where the root edge end portion is in contact with the edge of the inner gum 59 and no gap is formed in order to prevent plaque from adhering to the tooth neck of the tooth. So as to engage the inside of the dentition. Therefore, the second engaging portion 24 is formed at the end edge portion on the root side of the inner engaging member 20 (end portion on the root side of the recess 25), and mainly engages with the tooth neck portion.
  • the inner engagement member 20 has a height dimension that covers almost the entire inner surface of the tooth. Therefore, the first engagement portion 23 is formed at the end portion on the occlusion side of the inner engagement member 20 (the end portion on the occlusion side of the recess 25). However, when the first engagement portion 23 advances to the occlusal surface of the molars 55 and 58, the lower jaw teeth and the first engagement portion 23 come into contact with each other, and the meshing of the teeth changes.
  • the first engaging portion 23 is engaged with a portion of the molars 55 and 58 that is inclined in a direction that widens toward the root of the molar, such as a portion that does not cover the occlusal surface, for example, a portion slightly on the root side of the occlusal surface. Match.
  • the outer engagement member 30 is mainly disposed on the outer surface of the gingiva 59. Therefore, the second engagement portion 34 is formed at the occlusal end edge portion of the outer engagement member 30.
  • the molars 55 and 58 have a wider undercut portion than the front teeth and are in a deep position, so that it is not necessary to pay much attention to aesthetics. Therefore, the end edge part on the occlusion side of the outer engaging member 30 may extend beyond the tooth neck part to the outer side surface of the tooth (for example, around the maximum ridge).
  • a portion of the outer surface of the outer engagement member 30 that is applied to the gingiva 59 has a skin color that is the same color as that of the gingiva, and is a known coating that looks like gingiva in appearance.
  • a portion of the outer surface of the outer engagement member 30 that covers the teeth 55 and 58 is provided with a well-known coating having a white color that is the same as that of the teeth and making it appear externally.
  • the material of the partial denture 1 in addition to a metal such as a cobalt / chromium / molybdenum alloy or a gold alloy, a synthetic resin such as a polyether ether ketone (PEEK) resin or a ceramic such as zirconia can be used.
  • a synthetic resin such as a polyether ether ketone (PEEK) resin or a ceramic such as zirconia
  • the base portion 12A of the first divided body 12 of the artificial tooth 10 and the inner engagement member 20 are made of metal integrally formed by casting using a metal material
  • the artificial tooth The base portion 13C of the tenth second divided body 13 and the outer engaging member 30 are also made of metal integrally molded by casting using the same metal material.
  • the partial denture 1 according to 1 of the application example 1 has the above configuration, and the procedure for mounting the partial denture 1 on the dentition will be described next.
  • the pair of engaging members 20 and 30 are opened. As a result, the pair of engaging members 20 and 30 are separated so that the tooth row can be inserted. In this state, the pair of engaging members 20 and 30 are moved in and out of the tooth row.
  • the inner engaging member 20 is moved to the dentition side and engaged with the dentition from the inner side.
  • the artificial tooth 10 arrange
  • the outer engaging member 30 may be first brought into contact with the tooth row instead of the inner engaging member 20.
  • the outer engagement member 30 is moved to the dentition side to close the pair of engagement members 20 and 30, and the outer engagement member 30 is engaged with the dentition from the outside as shown in FIG. Combine.
  • the pair of engaging members 20 and 30 are fixed in the closed state by the lock structure 14, and the partial denture 1 is attached to the dentition.
  • both the first engagement portion 20 and the second engagement portion 30 whose inclination directions are opposite to each other are formed on the inner engagement member 20. Has been. Therefore, when the partial denture 1 is in the closed state, that is, in the mounting form, the second engagement portion 30 cannot interfere with the dentition and attach the partial denture 1 to the dentition.
  • the partial denture 1 according to 1 of the application example 1 employs an openable / closable type in which a tooth row can be inserted and separated. Thereby, the 1st engaging part 20 and the 2nd engaging part 30 can be engaged from a lateral direction with respect to a dentition, and the partial denture 1 can be easily mounted
  • the plurality of recesses 25 of the inner engagement member 20 are surface-engaged with the inner side surface of the dentition, and the plurality of first portions of the inner engagement member 20 are arranged. .. And the plurality of second engaging portions 24 engage with the inside of the dentition.
  • the plurality of second engaging portions 34 of the outer engaging member 30 engage with the outside of the tooth row. Thereby, a pair of engaging members 20 and 30 engage so that a dentition may be wrapped from the inner side and the outer side.
  • the partial denture 1 according to 1 of the application example 1 does not move in the dentition without moving in any of the inner and outer directions (horizontal direction) of the dentition, the occlusal direction (vertical direction), and the rotation direction with respect to the dentition. Can be attached firmly.
  • the partial denture 1 according to 1 of Application Example 1 is a metal rigid body, and is not easily bent or deformed. Therefore, even if it is used for a long time, the engaged state does not weaken or become uneven. Thereby, the user can use a partial denture with a comfortable wearing feeling.
  • the partial denture 1 which concerns on 1 of the application example 1, while mounting
  • the left second incisor 53, the left third canine 54, the left fourth molar 55 and the left seventh molar 58) are inclined in the direction of spreading toward the root. It is engaged with the inclined part. Therefore, the occlusal force applied to the artificial tooth 10 does not substantially act on the alveolar ridge in the defect portion 51 and can be distributed to a plurality of teeth.
  • hard foods that require a strong occlusal force held by partial dentures cannot be eaten, and the load is unbalanced, so the burden on the remaining teeth is large and the life of the remaining teeth is shortened. Can be solved.
  • the partial denture 1 according to 1 of Application Example 1 is a metal rigid body, and is not easily bent or deformed. Therefore, even if it is used for a long time, the engaged state does not weaken or become uneven. As a result, there is no problem in that the effect of dispersion of the occlusal force is biased, and the occlusal force acts excessively on a specific tooth to shorten the life of the tooth.
  • the partial denture 1 according to 1 of the application example 1 is mounted using the remaining tooth as it is. This eliminates the need to cut the remaining teeth in order to align the partial dentures like a crown bridge. Therefore, it has a very large effect for the user that the loss of the healthy tooth can be prevented.
  • the artificial tooth 10 is divided. For this reason, for example, even if a defect such as the coating portion 13D that is more brittle than metal is missing, cracked, or peeled off from the base portion 13C occurs over time, the hinge portion 40 is removed and only the outer engagement member 30 side is repaired. It becomes possible. Thereby, material costs can be reduced, processing costs can be reduced, and maintenance costs can be suppressed.
  • the occlusal side surface 12a which is a substantially flat surface of the first divided body 12 and the root side which is also the substantially flat surface of the second divided body 13 are used.
  • the lateral surface 13b is in abutment with the surface. Therefore, the occlusal force applied to the occlusal surface 13a of the second divided body 13 is surely applied to the first divided body 12 via the second divided body 13, the lateral surface 13b on the root side, and the lateral surface 12a on the occlusal side. Communicated.
  • the occlusal force transmitted to the first divided body 12 is reliably dispersed and transmitted to the plurality of remaining teeth via the inner engagement member 20 and the plurality of first engagement portions 23.
  • the occlusal side surface 12a of the first divided body 12 and the lateral surface 13b on the root side of the second divided body 13 are substantially flat surfaces.
  • the lateral surface 12 a on the occlusion side is slightly inclined downward toward the second divided body 13, and the lateral surface 13 b on the tooth root side of the second divided body 13 is directed toward the first divided body 12. And slightly tilted up.
  • the width in the vertical direction of the outer engagement member 30 is narrower than the width in the vertical direction of the inner engagement member 20. Moreover, the outer engagement member 30 is unevenly distributed on the gingival side. Thereby, the partial denture 1 which concerns on 1 of the application example 1 is excellent in aesthetics. However, if it is a user who does not care about that, or if it can be made inconspicuous by performing an aesthetic treatment by coating, the outer engagement member 30 can be made wider in the vertical direction, The engagement force may be increased by arranging more on the outer surface of the tooth.
  • the lock structure 14 is not a site
  • the first divided body 12 and the second divided body 13 are provided.
  • the lock structure 14 is provided between the first divided body 12 and the second divided body 13 of the artificial tooth 10 close to the hinge portion 40. There is no such problem.
  • the lock structure 14 is provided in the comparatively wide division surface 11 in the artificial tooth 10, the freedom degree of design is high.
  • the lock structure 14 is hidden by the dividing surface 11, it is very hygienic.
  • the partial denture 1 according to 2 of Application Example 1 is for prosthetic restoration of the missing part 51 of the upper right right 6th and right 7th molars and the missing left 51th and left 7th molars 51. Are attached to the dentition of all teeth (right side 1 to 5 and left side 1 to 5 teeth 52 to 56).
  • the partial denture 1 according to 1 of Application Example 1 is also provided on the right side, and is the same as the configuration in which both the left and right inner engagement members 20 and 20 are extended and connected. Since the missing part 51 is the innermost part, there is no pair of distal arm parts 22 and 32 as in the partial denture 1 according to Application Example 1, but the first divided body 12 and the second part of the artificial tooth 10 This is a point at which the divided body 13 is hinge-coupled by the hinge portion 40.
  • the outer engagement member 30 extends to the second incisor 53 on the right side and the left side in Application Example 1 2 as in Application Example 1.
  • the first engaging portions 24,... are provided for all remaining teeth 52 to 56 (the right and left first and second teeth 52, 53 are auxiliary engaging portions. ).
  • the partial denture 1 according to Application Example 3 is for prosthesis of the missing part 51 of the upper left molar of the upper jaw, the third canine 54 on the left, the fourth molar 55 on the left, the fifth molar on the left 56 and the left side No. 7 molar 58.
  • the configuration is the same as that of the partial denture 1 according to the first application example 1, but the difference is that in the partial denture 1 according to the first application example 1, the axis of the hinge portion 40 is in the vertical direction. In contrast, in the partial denture 1 according to 3 of Application Example 1, the axis of the hinge portion 40 is in the horizontal direction, and the pair of engaging members 20 and 30 are vertically moved.
  • the ends of the pair of distal arms 22 and 32 are hinge-coupled with respect to the hinge portion 40 and the hinge portion 40, whereas the application example In the partial denture 1 according to 1-3, the first divided body 12 and the second divided body 13 of the artificial tooth 10 are hinge-coupled (at a site inside the dentition).
  • the procedure for attaching the partial denture 1 according to 3 of Application Example 1 to the dentition is basically the same as the partial denture 1 according to 1 of Application Example 1.
  • the pair of engagement members 20 and 30 are opened, and in this state, the pair of engagement members 20 and 30 are moved in and out of the dentition.
  • the inner engagement member 20 is then moved to the dentition side to engage the dentition from the inside.
  • the outer engagement member 30 is moved to the dentition side, the pair of engagement members 20 and 30 are closed, and the outer engagement member 30 is engaged with the dentition from the outside.
  • the pair of engaging members 20 and 30 are fixed in the closed state by the lock structure 14, and the partial denture 1 is attached to the dentition.
  • the outer engagement member 30 when the outer engagement member 30 is moved to the dentition side, the outer engagement member 30 is applied according to 1 of application example 1 that moves in the lateral direction. Unlike the partial denture 1, it moves in an arc from the occlusal side to the root side around the axis of the hinge 40. However, by setting the position of the hinge portion 40, the outer engaging member 30 does not interfere with the outer surface of the tooth row having a drum shape, and reaches and engages the tooth neck portion. Therefore, even the partial open / closed partial denture 1 according to 3 of Application Example 1 can be easily attached to the dentition.
  • the pair of engaging members 20 and 30 are opened and closed by a rotating structure by the hinge portion 40.
  • the pair of engaging members 20 and 30 may be opened and closed by being relatively displaced in parallel in the inner and outer directions of the dentition.
  • the combination of the first engaging portion 23 and the second engaging portion 24 is provided on the inner engaging member 20.
  • the combination of the first engaging portion 23 and the second engaging portion 24 may be provided also on the outer engaging member 30, and not the inner engaging member 20 but the outer engaging member 20. It may be provided only on the engaging member 30.
  • the artificial tooth 10 is configured in a divided manner.
  • the artificial tooth 10 may not be a split type but may be a single type provided on either the inner engagement member 20 or the outer engagement member 30.
  • it is the outer engagement member 30 that has a relatively high possibility of refurbishment. Therefore, when taking a single unit, it is preferable to provide the artificial tooth 10 on the inner engagement member 20. .
  • the inner engagement member 20 and the outer engagement member 30 are engaged with the same tooth.
  • the outer engaging member 30 may be engaged with a part of the teeth with which the inner engaging member 20 is engaged, or vice versa, or the teeth with which the inner engaging member 20 is engaged.
  • the teeth engaged by the outer engagement member 30 may be different or may be shifted in the dentition direction.
  • the first engaging portion 23 and the second engaging portion 24 are basically engaged with the same tooth.
  • the tooth with which the first engaging portion 23 is engaged and the tooth with which the second engaging portion 24 is engaged may not be completely coincident.
  • the second engaging portion 24 may be engaged with different teeth.
  • the number of teeth with which the first engaging portion 23 engages is preferably at least three teeth from the viewpoint of suitably dispersing the occlusal force applied to the artificial tooth 10. This also depends on the number of missing teeth, and the first engaging portion 23 is preferably engaged with a number of teeth that is twice or more the number of missing teeth.
  • the first engagement portion 23 is provided at a portion not on the occlusal surface so as not to change the original meshing.
  • the first engaging portion 23 may be provided at a site on the occlusal surface.
  • the recess 25 is provided in a portion corresponding to each tooth of the engagement member 20, and the first engagement portion 23 is provided at the occlusal end of the recess 25.
  • the second engagement portion 24 is provided at the end of the recess 25 on the tooth root side so that the engagement between the engagement member 20 and the tooth surface is strengthened.
  • the first engaging portion 23 and the second engaging portion 24 may be partially engaged.
  • the 1st division body 12 and the inner side engagement member 20 of the artificial tooth 10, and the 2nd division body 13 and the outer side engagement member 30 are each, It is integrally molded by casting.
  • the manufacturing method is not limited to casting, and may be cut out by cutting.
  • the artificial tooth 10 and the engaging members 20 and 30 may be integrated by combining separately created ones.
  • the occlusal side surface 12a of the first divided body 12 constituting the first divided surface 11a of the artificial tooth 10 and the root of the second divided body 13 are used.
  • the side surface 13b on the side, the rising surface 12d of the first divided body 12 constituting the second divided surface 11b, and the rising surface 13d of the second divided body 13 are in surface contact with each other.
  • the first divided surface 11a is preferably in surface contact in order to properly transmit the occlusal force, but the second divided surface 11b is not necessarily in surface contact and may have a slight gap.
  • the second divided body 13 of the artificial tooth 10 has a laminated structure of a base portion 13C and a coating portion 13D.
  • a metal material constituting the base portion 13C may be integrally formed with a shape corresponding to the base portion 13C and the coating portion 13D.
  • the single base portion 13C may be provided with the cusp or occlusal surface of the artificial tooth 10 or the outer surface of the artificial tooth 10 without using the coating portion 13D.
  • the coating process is not necessarily essential if it is not aesthetically pleasing.
  • the lock structure 14 is a combination of the engagement recess and the engagement protrusion.
  • the present invention is not limited to this, and any known or well-known lock structure that can be applied to an openable / closable partial denture can be used.
  • the lock structure 14 is provided on the divided surface 11 of the artificial tooth 10.
  • the present invention is not limited to this, and the lock structure 14 may be provided in another part.
  • ⁇ Application example 2> ⁇ 1 of Application Example 2>
  • a first specific example (part 1 of application example 2) of the partial denture according to application example 2 will be described with reference to FIGS. 9 to 13.
  • the partial denture according to 1 of the application example 2 is attached to the upper dentition.
  • an upper jaw model imitating the upper jaw is used and this is considered as an actual upper jaw. .
  • the partial denture 1 according to Application Example 2 1 is for prosthetic restoration of the missing portions 51 and 51 of the left and right No. 6 and No. 7 molars.
  • the teeth 52, 52, the second incisor 53, 53, the third canine 54, 54, the fourth molar 55, 55, and the fifth molar 56, 56 are mounted on the dentition.
  • the partial denture 1 is for the so-called free ends on both sides where there are no teeth in the centrifuge than the left and right missing parts 51, 51.
  • the partial denture 1 is connected to the artificial tooth 10 disposed in the defect portion 51, the inner engagement member 20 that supports the artificial tooth 10 and engages the dentition from the inside, and the artificial tooth 10, and has elasticity. Then, by elastically deforming in a direction away from the inner engagement member 20, the tooth row can be inserted between the inner engagement member 20 and elastically restored to engage the tooth row from the outside. And an engaging member 30 on the outside.
  • the artificial tooth 10 is a single body simulating the shape of a tooth, or a laminated body having a base coated with a well-known coating having a white color similar to that of the tooth and showing the appearance of the tooth.
  • Application Example 2 the two adjacent molars of No. 6 and No. 7 on the left and right are missing, and the artificial tooth 10 is provided with these two teeth integrally.
  • the inner engagement member 20 has an arch shape that engages the entire dentition from the inside.
  • the inner engagement member 20 includes left and right first incisors 52 and 52, second incisors 53 and 53, third canine teeth 54 and 54, fourth molar 55, It has an arch shape that engages with the inside of the remaining dentition of No. 55 and No. 5 molars 56 and 56.
  • the inner engagement member 20 has a gap between the end edge on the root side and the edge of the inner gum 59 in order to prevent plaque from adhering to the tooth neck. Engage inside the dentition so that it is not possible.
  • the inner engagement member 20 includes first engagement portions 23,... That engage with the inclined portions of the corresponding teeth that are inclined in a direction that expands toward the tooth root.
  • the inner engagement member 20 includes left and right first incisors 52 and 52, second incisors 53 and 53, third canine teeth 54 and 54, fourth molar 55, A first engagement portion 23 is provided for each of the 55 and fifth molars 56 and 56.
  • the inner engagement member 20 is a portion (one occlusion of a crown) of one or a plurality of molars close to the defect portion 51 from the occlusal surface to the inner and outer inclined portions that incline in a direction extending toward the root.
  • a crown portion 26 is provided on the side portion.
  • the inner engagement member 20 includes a crown portion 26 for each of the left and right fourth molars 55 and 55 and the fifth molars 56 and 56.
  • the inner engagement member 20 includes a spacer portion 27 having a predetermined thickness and covering the cut end portion of each mesial tooth.
  • the spacer portion 27 extends from the end edge portion on the occlusion side of the first engaging portion 23 in each corresponding tooth, bends outward from the inside through the cutting edge, and is placed on the cutting edge portion of each tooth.
  • the spacer portion 27 is formed of a transparent resin or the like so as to be inconspicuous in appearance.
  • the inner engagement member 20 is provided for the front teeth of the first and second incisors 52 and 52, the second incisors 53 and 53, and the third canines 54 and 54, respectively.
  • a spacer portion 27 is provided.
  • the spacer part 27 is integrally formed along the front tooth row.
  • the first engaging portion 23 is continuous along the front tooth row with an intermediate portion in the occlusal direction (vertical direction) of the crown of each tooth as an end edge portion on the occlusion side. Therefore, the spacer part 27 is arrange
  • the outer engagement member 30 is located in a mesial manner along a dentition from a predetermined portion of the artificial tooth 10, more specifically, from a portion corresponding to the outer tooth neck of the artificial tooth 10 corresponding to the sixth molar.
  • the arm part 31 extended, and the T-shaped roach part 33 extended from the site
  • the arm portion 31 Since the arm portion 31 is long, it has flexibility due to elasticity.
  • the arm portions 31 are elastically deformed in a direction (outside) in which each of the roach portions 33 is separated from the inner engagement member 20, so that the interval between the roach portion 33 and the inner engagement member 20 is increased. Yes.
  • the horizontal bar portion 33a of the roach portion 33 is curved so as to be fitted to the outer surface of the tooth that is curved from the mesial to the centrifugal, and becomes the second engaging portion 34 that engages with the undercut portion outside the tooth.
  • the outer engagement member 30 includes left and right second incisors 53, 53, third canines 54, 54, fourth molars 55, 55, and 5 having undercut portions.
  • a second engaging portion 34 is provided for each of the molars 56, 56.
  • the arm portion 31 is disposed on the outer surface of the gum 59. From there, the roach 33 extends to the occlusal side and reaches the outer surface of the tooth.
  • the second engaging portion 34 (the horizontal bar portion 33a of the roach portion 33) is adapted to engage closer to the maximum bulge portion in the undercut portion.
  • the undercut part does not necessarily exist in all the teeth (especially the front tooth), in that case, the second engaging part 34 is simply engaged with the outer surface of the tooth.
  • a portion of the outer surface of the outer engagement member 30 that is applied to the gingiva 59 has a skin color that is the same color as that of the gingiva, and is a known coating that looks like gingiva in appearance.
  • a portion of the outer surface of the outer engagement member 30 that is applied to the teeth may be provided with a known coating having a white color that is the same color as the teeth and appearing on the appearance. is there.
  • the material of the partial denture 1 may be any material as long as it has rigidity as a partial denture and can give elasticity to the arm portion 31 of the outer engagement member 30, such as a cobalt-chromium-molybdenum alloy or the like.
  • synthetic resins such as polyetheretherketone (PEEK) resin and ceramics such as zirconia can be used.
  • the artificial tooth 10, the inner engagement member 20 (excluding the spacer portion 27), and the outer engagement member 30 are made of metal integrally formed by casting using a metal material.
  • the partial denture 1 according to 1 of the application example 2 has the above configuration, and the procedure for mounting the partial denture 1 on the dentition will be described next.
  • a second engagement portion 34 that engages with an undercut portion of each tooth is formed on the outer engagement member 30. Therefore, if the partial denture 1 is left as it is, the second engaging portion 34 cannot interfere with the dentition (the ridge on the outer side surface thereof) and attach the partial denture 1 to the dentition.
  • the partial denture 1 according to 1 of the application example 2 can be elastically changed so that the outer engagement member 30 is widened with the inner engagement member 20. Thereby, the 2nd engaging part 34 can be engaged with the undercut part which exists in the tooth root side rather than the largest bulge part beyond the largest bulge part of the outer surface of each tooth, and the partial denture 1 is dentition Can be easily installed.
  • the plurality of first engagement portions 23 of the inner engagement member 20 engage with the inner side of the dentition.
  • the plurality of second engaging portions 34 of the outer engaging member 30 engage with the outside of the tooth row.
  • a pair of engaging members 20 and 30 are engaged so that a tooth row may be pinched
  • the molar portion in the dentition is covered with a crown portion 26 so as to cover a portion on the occlusal side of the crown.
  • the partial denture 1 according to Application Example 2 1 can move to the dentition without moving in any of the internal and external directions (horizontal direction), the occlusal direction (vertical direction), and the rotation direction with respect to the dentition. Can be attached firmly.
  • the partial denture 1 according to 1 of Application Example 2 is a metal rigid body, and is not easily bent or deformed. Therefore, even if it is used for a long time, the engaged state does not weaken or become uneven. Thereby, the user can use a partial denture with a comfortable wearing feeling.
  • the partial denture 1 which concerns on 1 of the application example 2, while mounting
  • Each of the teeth is engaged with an inclined portion that inclines in a direction that expands toward the tooth root. Therefore, the occlusal force applied to the artificial tooth 10 does not substantially act on the alveolar ridge in the defect portion 51 and can be distributed to a plurality of teeth.
  • the second incisors 53 engage with the second incisors 53, 53.
  • the engaging portion 34 mainly resists to prevent the floating. Even if the right or left artificial tooth 10 is subjected to an occlusal force, even if the right or left side of the partial denture 1 is subjected to a force to lift the other side, either the right side or the left side
  • the second engaging portion 34 that engages with the other third to fifth teeth mainly resists and can also be prevented from rising.
  • the partial denture 1 according to application example 1 has any direction of the inner and outer directions (horizontal direction) of the dentition, the occlusal direction (vertical direction), and the rotation direction with respect to the dentition, no matter how the occlusal force is applied. In this case, it can be firmly attached to the dentition without moving.
  • the partial denture 1 according to 1 of Application Example 2 is a metal rigid body, and is not easily bent or deformed. Therefore, even if it is used for a long time, the engaged state does not weaken or become uneven. As a result, there is no problem in that the effect of dispersion of the occlusal force is biased, and the occlusal force acts excessively on a specific tooth to shorten the life of the tooth.
  • the partial denture 1 according to 1 of the application example 2 is mounted using the remaining tooth as it is. This eliminates the need to cut the remaining teeth in order to align the partial dentures like a crown bridge. Therefore, it has a very large effect for the user that the loss of the healthy tooth can be prevented.
  • the height of the tooth covered with the crown portion 26 is increased by the thickness of the crown portion 26, and thus the artificial tooth 10 is also higher than the original missing tooth.
  • the front teeth are covered with a spacer portion 27 having a predetermined thickness. Thereby, when the remaining dentition is not properly meshed, the meshing can be corrected (reconstructed).
  • the meshing is corrected.
  • the crown portion 26 and the spacer portion 27 may not be provided (the meshing correction is not performed).
  • the first engaging portion 23 is engaged with all the teeth of the remaining dentition.
  • the number of the first engaging portions 23 and the second engaging portions 34 may be reduced as long as the effect of the application example 2 is not impaired.
  • the outer engaging member 30 is provided with the arm part 31, and the roach part 33 extended toward the outer surface of each tooth
  • the second engagement portion 34 is formed at the tip end portion (lateral bar portion 33 a) of the roach portion 33.
  • the formation of the second engaging portion 34 is not limited to this form.
  • the roach portion 33 is not provided, and the second engagement portion 34 is formed at the occlusal end edge portion of the inner engagement member 20 (arm portion 31), and is mainly engaged with the tooth neck portion. Also good.
  • the roach part 33 is formed in a T shape having a lateral bar part 33a that is curved along the outer side surface of the tooth as a second engaging part 34 at the tip part.
  • the roach portion 33 may have other shapes such as an I shape, an L shape, and a U shape.
  • the partial denture 1 which concerns on 1 of the said application example 2 is a partial denture with respect to the free end of both sides or one side. However, it may be a partial denture for an intermediate defect in which natural teeth remain in the centrifuge rather than the defect part 51.
  • the partial denture 1 according to 1 of the application example 2 is a partial denture with respect to both free ends.
  • a partial denture in a form in which the opposite side of the missing part 51 on the right side or the left side is removed at any part of the first to third front teeth 52 to 54 can be adopted as a partial denture for the one-side free end. .
  • the number of teeth with which the first engaging portion 23 engages is preferably at least three teeth from the viewpoint of suitably dispersing the occlusal force applied to the artificial tooth 10. This also depends on the number of missing teeth, and the first engaging portion 23 is preferably engaged with a number of teeth that is twice or more the number of missing teeth.
  • the partial denture 1 according to 1 of Application Example 3 is for prosthesis of the missing part 51 of the left and right first teeth and the second front teeth, and the left and right third canine teeth 54, 54, 4th molar 55,55, 5th molar 56,56, 6th molar 57,57 and 7th molar 58,58.
  • the partial denture 1 is bent so that the width is narrowed, and the artificial tooth 10 disposed in the defect portion 51, the first state that supports the artificial tooth 10 and engages the inside of the dentition with an arch shape.
  • Engaging members 20A and 20B that are deformable to the second state are provided.
  • the artificial tooth 10 is a laminate in which the base portion 15 has a white color of the same color as the teeth and is coated with a known coating (coating portion 16) to make it appear on the appearance.
  • the left and right first and second adjacent four front teeth are missing, and the artificial tooth 10 is provided with these four teeth integrally.
  • the engaging members 20A and 20B are rotatably connected to a first engaging member 20A extending from the distal end along the dentition and mesial to the mesial end of the first engaging member 20A. And a second engagement member 20B extending along the tooth row.
  • the first engagement member 20 ⁇ / b> A extends from the left seventh molar 58 to the left third canine 54 and further extends to fill the defect 51.
  • the second engagement member 20B starts from the missing portion 51 and extends from the right third tooth to the right seventh tooth 58.
  • deletion part 51 of 20 A of 1st engagements serves as the base part 15 of the artificial tooth 10.
  • the mesial end portion of the second engagement member 20B is rotatably connected to the mesial end portion of the first engagement member 20A in the overlapping portion 28.
  • the mesial end portion of the second engagement member 20B is rotatably connected to the mesial end portion of the first engagement member 20A in the overlapping portion 28.
  • Corresponding parts are rotatably connected by a hinge part 40 using a pin shaft 41.
  • a lock structure 29 is provided for releasably fixing the overlapped state (matched state) of the mesial end (the end on the connection side) of the member 20B.
  • the lock structure 29 includes an engagement recess formed in one of the rising surfaces 28a of the first engagement member 20A or the overlapping surface 28b of the second engagement member 20B, and the other rising surface. And an engaging protrusion formed on the surface.
  • the second engagement member 20B rotates in the direction away from the inside of the dentition, the mesial end of the first engagement member 20A and the connection side of the second engagement member 20B When the end portion is separated, the engagement protrusion is disengaged from the engagement recess, and the lock is released.
  • Each of the first engagement member 20A and the second engagement member 20B includes first engagement portions 23,... That engage with inclined portions of the corresponding teeth that are inclined in a direction that expands toward the tooth root. And a second engaging portion 24,... That engages with the undercut portion of the tooth having an undercut portion inclined to the opposite side of the inclined portion.
  • the first engagement member 20A includes the left third canine 54, the left fourth molar 55, the left fifth molar 56, the left sixth molar 57, and the left seventh molar.
  • the left third canine tooth 54, the left fourth molar 55, the left fifth molar 56, and the left sixth molar 57 having the first engaging portion 23 and having an undercut portion.
  • the second engaging portion 24 is provided for each of the left and right No. 7 molars 58.
  • the second engagement member 20B is provided for each tooth of the right third canine 54, right fourth molar 55, right fifth molar 56, right sixth molar 57 and right seventh molar 58.
  • a first right-side third canine tooth 54, a right-side fourth molar 55, a right-side fifth molar 56, a right-side sixth molar 57, and a right-side seventh molar 58 having a first engagement portion 23 and having an undercut portion.
  • a second engaging portion 24 is provided for each tooth.
  • the first engagement portion 23 is also provided at the distal end portion of the first engagement member 20A (see FIG. 17).
  • the first engagement member 20 ⁇ / b> A includes a first engagement portion 23 with respect to the right third toothed dog 54.
  • each of the first engaging member 20A and the second engaging member 20B includes a concave portion 25 having a shape along the inner surface of each tooth.
  • the first engagement portion 23 is formed on the occlusal side (lower side in the drawing) of the recess 25.
  • the second engagement portion 24 is formed on the tooth root side (the upper side in the drawing) of the recess 25.
  • each of the first engaging member 20A and the second engaging member 20B has a gingival 59 having an inner edge at the root side in order to prevent plaque from adhering to the tooth neck. Engage with the inside of the dentition so that there is no gap in contact with the edges. Therefore, the second engaging portion 24 is formed at the root edge end portion (the root portion end portion of the recess 25) of each of the first engaging member 20A and the second engaging member 20B. Engage with the tooth neck.
  • each of the first engaging member 20A and the second engaging member 20B has a height dimension that almost entirely covers the inner surface of the tooth. Therefore, the first engagement portion 23 is formed at the end portions on the occlusion side of the first engagement member 20A and the second engagement member 20B (the end portion on the occlusion side of the recess 25). However, when the first engagement portion 23 advances to the occlusal surface of the molars 55 to 58, the lower jaw teeth and the first engagement portion 23 come into contact with each other, and the meshing of the teeth changes.
  • the first engaging portion 23 is engaged with a portion of the molars 55 to 58 that does not cover the occlusal surface, for example, a portion slightly on the root side of the occlusal surface, of the inclined portion that inclines in a direction that extends toward the root. Match.
  • each of the first engagement member 20A and the second engagement member 20B is made of metal integrally formed by casting using a metal material.
  • the partial denture 1 according to 1 of Application Example 3 has the above-described configuration, and the procedure for mounting the partial denture 1 on the dentition will be described next.
  • the engaging members 20A and 20B are bent so that the width is reduced to be in the second state. Accordingly, the engaging members 20A and 20B can be inserted inside the tooth row, and in this state, the engaging members 20A and 20B are moved inside the tooth row.
  • the engaging members 20A and 20B are moved to the corresponding positions, as shown in FIG. 20A, the first engaging member 20A is moved to the dentition side to engage the dentition from the inside. .
  • the artificial tooth 10 is arrange
  • the second engagement member 20B is moved to the dentition side so that the engagement members 20A and 20B are in an arched first state, and the second engagement is performed.
  • the member 20B is engaged with the dentition from the inside.
  • the engaging members 20A and 20B are fixed in the first state by the lock structure 29, and the partial denture 1 is mounted on the dentition.
  • the partial denture 1 according to 1 of the application example 3 includes the first engaging portion 23 and the first engaging member 23 that are opposite to each other in the first engaging member 20A and the second engaging member 20B. Both of the second engaging portions 24 are formed. Therefore, if the partial denture 1 is in the first state, that is, in the mounting form, the second engaging portion 24 interferes with the dentition (the ridges on the inner surface thereof) and attaches the partial denture 1 to the dentition. I can't.
  • the partial denture 1 according to Application Example 3 has the width of the engagement members 20A and 20B (the distal end of the first engagement member 20A and the distal end of the second engagement member 20B). The bend type is adopted so that it can be inserted inside the dentition. Thereby, the 1st engaging part 23 and the 2nd engaging part 24 can be engaged with a dentition from a horizontal direction, and the partial denture 1 can be easily mounted
  • the plurality of recesses 25 of the first engagement member 20A and the second engagement member 20B are surface-engaged with the inner surface of the dentition, and the first The plurality of first engaging portions 23,... And the plurality of second engaging portions 24,... Of each of the one engaging member 20A and the second engaging member 20B engage with the inside of the tooth row.
  • engagement member 20A, 20B is engaged so that it may stretch inside a tooth row. Therefore, the partial denture 1 according to 1 of Application Example 3 does not move in the dentition without moving in any of the inner and outer directions (horizontal direction) of the dentition, the occlusal direction (vertical direction), and the rotation direction with respect to the dentition. Can be attached firmly.
  • the partial denture 1 according to 1 of Application Example 3 is a metal rigid body, and is not easily bent or deformed. Therefore, even if it is used for a long time, the engaged state does not weaken or become uneven. Thereby, the user can use a partial denture with a comfortable wearing feeling.
  • the partial denture 1 which concerns on 1 of the application example 3, while mounting
  • the partial denture 1 according to 1 of Application Example 3 is a metal rigid body, and is not easily bent or deformed. Therefore, even if it is used for a long time, the engaged state does not weaken or become uneven. As a result, there is no problem in that the effect of dispersion of the occlusal force is biased, and the occlusal force acts excessively on a specific tooth to shorten the life of the tooth.
  • the partial denture 1 according to 1 of the application example 3 is mounted using the remaining tooth as it is. This eliminates the need to cut the remaining teeth in order to align the partial dentures like a crown bridge. Therefore, it has a very large effect for the user that the loss of the healthy tooth can be prevented.
  • the lock structure 29 is provided in the overlapping portion 28 of the first and second engaging members 20A and 20B. Therefore, the degree of freedom in design is high. Moreover, since the lock structure 29 is hidden by the overlapping surfaces 28a and 28b of the first and second engaging members 20A and 20B, it is very hygienic.
  • the engaging members 20A and 20B are bent by a rotating structure by the hinge portion 40.
  • the second engagement member 20B (the end thereof) may be bent by sliding on the first engagement member 20A.
  • the engagement member is constituted by the first engagement member 20A and the second engagement member 20B.
  • transformation part which can be elastically deformed in an intermediate part may be sufficient.
  • the artificial tooth 10 is provided on the first engagement member 20A.
  • the artificial tooth 10 may be provided on the second engagement member 20B.
  • the artificial tooth 10 is divided, the first divided body of the artificial tooth 10 is provided in the first engaging member 20A, and the second divided body of the artificial tooth 10 is provided in the second engaging member 20B. May be used.
  • the first engagement member 20A and the second engagement member 20B are engaged with the teeth having the same tooth number.
  • the first engaging member 20A and the first engaging member 20A and the first engaging member 20A are arranged such that the number of teeth engaged with the first engaging member 20A is larger or smaller than the number of teeth engaged with the second engaging member 20B.
  • the lengths in the dentition direction of the two engaging members 20B may be different. Therefore, it is not essential that each of the first engaging member 20A and the second engaging member 20B extends to the innermost tooth (the seventh molar 58).
  • the first engagement portion 23 and the second engagement portion 24 are basically engaged with the same tooth.
  • the tooth with which the first engaging portion 23 is engaged and the tooth with which the second engaging portion 24 is engaged may not be completely coincident.
  • the second engaging portion 24 may be engaged with different teeth.
  • the number of teeth with which the first engaging portion 23 engages is preferably at least three teeth from the viewpoint of suitably dispersing the occlusal force applied to the artificial tooth 10. This also depends on the number of missing teeth, and the first engaging portion 23 is preferably engaged with a number of teeth that is twice or more the number of missing teeth.
  • the first engagement portion 23 is provided at a portion not on the occlusal surface so as not to change the original engagement.
  • the first engaging portion 23 may be provided at a site on the occlusal surface.
  • the recessed part 25 is provided in the site
  • the first engaging portion 23 is provided on the tooth root side end of the recess 25, and the engagement between the engaging members 20A and 20B and the tooth surface is strengthened. I am doing so. However, instead of the surface contact, the first engaging portion 23 and the second engaging portion 24 may be partially engaged.
  • the base portion 15 of the artificial tooth 10, the first engaging member 20A, and the second engaging member 20B are each integrally molded by casting.
  • the manufacturing method is not limited to casting, and may be cut out by cutting.
  • the artificial tooth 10 and the engaging members 20A and 20B may be integrated by combining separately created ones.
  • the lock structure 29 is a combination of the engagement recess and the engagement protrusion.
  • the present invention is not limited to this, and any known or well-known lock structure that can be applied to a bending partial denture can be used.
  • the lock structure 29 is provided on the overlapping surfaces 28a and 28b of the overlapping portions 28 of the first and second engaging members 20A and 20B.
  • the present invention is not limited to this, and the lock structure 29 may be provided in another part.
  • the mesial end surface of the first engagement member 20A and the mesial end surface of the second engagement member 20B are provided without providing the overlapping portion 28 of the first and second engagement members 20A, 20B.
  • a lock structure may be provided on the end face after the first state is obtained by abutting.
  • the partial denture 1 according to 1 of the above application example 3 is a partial denture for an intermediate defect in which the front teeth are missing. However, it may be a partial denture with respect to an intermediate defect in which the missing part 51 is biased to the right side or the left side.

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  • Oral & Maxillofacial Surgery (AREA)
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  • Dental Prosthetics (AREA)

Abstract

Une prothèse dentaire partielle comprend : une dent artificielle 10 ; une paire d'éléments de mise en prise 20, 30 qui supportent la dent artificielle 10, qui sont conçus pour pouvoir s'ouvrir et se fermer, qui sont séparés l'un de l'autre de telle sorte qu'une rangée de dents peut être insérée entre ceux-ci dans un état ouvert, et qui sont en prise avec la rangée de dents depuis l'intérieur et l'extérieur dans un état fermé ; et une structure de verrouillage 14 qui verrouille l'état fermé de la paire d'éléments de mise en prise 20, 30 de manière libérable. Au moins l'un des éléments de la paire d'éléments de mise en prise 20, 30 comprend : des premières sections de mise en prise 23 qui viennent en prise avec des sections inclinées d'une pluralité de dents dans la rangée de dents, les sections inclinées étant inclinées plus loin dans la direction d'étalement à des positions plus proches des racines des dents ; et une seconde section de mise en prise 24 qui vient en prise avec une section de contre-dépouille d'au moins une dent dans la rangée de dents, la section de dégagement étant inclinée dans une direction opposée à la direction dans laquelle les sections inclinées sont inclinées.
PCT/JP2018/012329 2017-05-31 2018-03-27 Prothèse dentaire partielle WO2018220970A1 (fr)

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JP2017107337A JP6239180B1 (ja) 2017-05-31 2017-05-31 部分義歯
JP2017-107337 2017-05-31
JP2017-116669 2017-06-14
JP2017116669A JP6239181B1 (ja) 2017-06-14 2017-06-14 部分義歯
JP2017138750A JP6239182B1 (ja) 2017-07-18 2017-07-18 部分義歯
JP2017-138750 2017-07-18
JP2017-210275 2017-10-31
JP2017-210274 2017-10-31
JP2017-210276 2017-10-31
JP2017210274A JP2018202125A (ja) 2017-10-31 2017-10-31 部分義歯
JP2017210276A JP2019017971A (ja) 2017-10-31 2017-10-31 部分義歯
JP2017210275A JP2019000615A (ja) 2017-10-31 2017-10-31 部分義歯

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111759507A (zh) * 2020-07-08 2020-10-13 秦皇岛泽克尼陶瓷科技有限公司 一种微创美学支架义齿及其制备方法
JP2020199065A (ja) * 2019-06-10 2020-12-17 日歯研株式会社 歯の白色化方法
JP7232545B1 (ja) 2021-12-27 2023-03-03 有限会社ワイ・デンタル・ラボ 部分義歯の製造方法、及び、部分義歯

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005334419A (ja) * 2004-05-28 2005-12-08 Osaka Shika Center:Kk 人工歯複合体の製造方法
JP2008538973A (ja) * 2005-06-10 2008-11-13 クウォン，オウ−ダル 歯科用補綴物及びその製造方法
JP2011031012A (ja) * 2009-08-04 2011-02-17 Norio Hirose ミゾ（溝）を入れた維持装置
US20110086326A1 (en) * 2009-10-14 2011-04-14 Dentapia Co., Ltd. Dental prosthetic device and accessory thereof
JP2013135896A (ja) * 2007-03-16 2013-07-11 Wan Young Jang 歯科用補綴物及びその製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005334419A (ja) * 2004-05-28 2005-12-08 Osaka Shika Center:Kk 人工歯複合体の製造方法
JP2008538973A (ja) * 2005-06-10 2008-11-13 クウォン，オウ−ダル 歯科用補綴物及びその製造方法
JP2013135896A (ja) * 2007-03-16 2013-07-11 Wan Young Jang 歯科用補綴物及びその製造方法
JP2011031012A (ja) * 2009-08-04 2011-02-17 Norio Hirose ミゾ（溝）を入れた維持装置
US20110086326A1 (en) * 2009-10-14 2011-04-14 Dentapia Co., Ltd. Dental prosthetic device and accessory thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020199065A (ja) * 2019-06-10 2020-12-17 日歯研株式会社 歯の白色化方法
CN111759507A (zh) * 2020-07-08 2020-10-13 秦皇岛泽克尼陶瓷科技有限公司 一种微创美学支架义齿及其制备方法
JP7232545B1 (ja) 2021-12-27 2023-03-03 有限会社ワイ・デンタル・ラボ 部分義歯の製造方法、及び、部分義歯
JP2023096323A (ja) * 2021-12-27 2023-07-07 有限会社ワイ・デンタル・ラボ 部分義歯の製造方法、及び、部分義歯

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