US20140295375A1 - Tooth replacement - Google Patents

Tooth replacement Download PDF

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Publication number
US20140295375A1
US20140295375A1 US14/232,881 US201214232881A US2014295375A1 US 20140295375 A1 US20140295375 A1 US 20140295375A1 US 201214232881 A US201214232881 A US 201214232881A US 2014295375 A1 US2014295375 A1 US 2014295375A1
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US
United States
Prior art keywords
tooth
contact surface
replacement according
occlusal
mesial
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US14/232,881
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English (en)
Inventor
Wolfgang Arnold
Volker Brosch
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Kulzer GmbH
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Assigned to ARNOLD, WOLFGANG reassignment ARNOLD, WOLFGANG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BROSCH, VOLKER
Publication of US20140295375A1 publication Critical patent/US20140295375A1/en
Assigned to KULZER GMBH reassignment KULZER GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WOLFGANG ARNOLD
Abandoned legal-status Critical Current

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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
    • A61C13/08—Artificial teeth; Making same
    • A61C13/097—Artificial teeth; Making same characterised by occlusal profiles, i.e. chewing contact surfaces
    • 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

Definitions

  • the invention relates to a tooth replacement comprising at least one posterior tooth having a mesial contact surface, a distal contact surface, and an occlusal surface wherein the occlusal surface comprises a least one buccal cusp having a buccal cusp tip, a lingual cusp having a lingual cusp tip, a central fissure which has at least one tooth pit and passes through the occlusal surface in the mesiodistal direction between the two cusps, a first gradient which slopes downward from the buccal cusp tip in the direction of the central fissure, and a second gradient which slopes downward from the lingual cusp tip in the direction of the central fissure.
  • Teeth are mainly used to crush food, but also to speak.
  • the distinctive features of a tooth include the crown that protrudes from the gum out into the oral cavity, the tooth neck and the tooth root which may be split and which at one end has an opening for nerves.
  • the transition between the tooth crown and the tooth root is referred to as the tooth neck.
  • the natural dentition which consists of upper and lower jaw consists of incisors, canine teeth and posterior teeth, i.e., the premolars and molars.
  • the premolars are built lower and feature a two-cusped crown, the molars have broad, up to 5-cusped crown.
  • teeth In the context of this invention, entire teeth and tooth crowns are referred to as teeth.
  • Removable tooth replacement is necessary then when a large part of the natural teeth is no longer present or even all teeth had to be removed.
  • Today, such partial or full dentures mostly are made of plastic as a support material, in which the replacement teeth are embedded.
  • the common replacement teeth which are implemented in simplified form often cause unusual bite properties, wherein it is particularly unpleasant that the temporomandibular joint responds even to small deviations from the usual movement sequence, and at times also it is elected not to use the dentures for extended periods of time.
  • EP 1 010 402 B1 suggests a tooth replacement, wherein the replacement teeth are fitted with multi-functional occlusal surfaces like their real life counterparts, have an enlarged volume and have a buccally stepped tooth neck that prevents translucence of the tooth necks.
  • the cusps of the tooth crowns can have a slope that decreases from the premolars to the molars.
  • EP 1 010 402 B1 is hereby incorporated into this description in terms of the formation of the occlusal surfaces and cusp slope by express reference.
  • the use of the teeth as described in the cited document leads in many cases to satisfactory bite characteristics. However, it has been found that these bite characteristics may be lost during the period of use of the known dentures.
  • FIG. 1 shows an embodiment of the tooth replacement according to the invention from the front ( FIG. 1 a ) and from the back ( FIG. 1 b ),
  • FIG. 2 shows the occlusal surfaces of posterior teeth (molars and premolars) of the tooth replacement according to the invention
  • FIG. 3 shows side views of the left and right side of the jaw in the “neuronal contact position
  • FIG. 4 shows a view of the right half of the jaw from dorsal both in the phase of the closing of the jaw ( FIG. 4 a ) and in the closed position ( FIG. 4 b ),
  • FIG. 5 shows a view of the left half of the jaw from dorsal both in the phase of the closing of the jaw ( FIG. 5 a ) and in the closed position ( FIG. 5 b ),
  • FIG. 6 shows the occlusal surfaces of the posterior teeth of the tooth replacement according to the invention
  • FIG. 7 shows an occlusal view, a lingual view and a basal view of a tooth replacement according to the invention implemented in the form of a row of teeth (second embodiment),
  • FIG. 8 shows further side views of the first embodiment of the tooth replacement according to the invention.
  • FIG. 9 shows the occlusal surfaces of the individual posterior teeth of the first embodiment of the tooth replacement according to the invention.
  • FIGS. 1 to 6 , 8 and 9 show various views of a first embodiment of the tooth replacement according to the invention.
  • the present invention seeks to provide an improved tooth replacement, which can ensure the desired bite characteristics reliably over a long period of time and which is established easily and clearly.
  • this object is achieved by a refinement of the well-known tooth replacement that is essentially characterized in that the mesial contact surface, the distal contact surface and/or the occlusal contact surface comprise expansion spaces that have been incorporated in a targeted manner to obtain a dynamic occlusal guidance.
  • the posterior teeth can be easily and clearly established mutually.
  • the teeth of the tooth replacement are fitted with natural occlusal surface dimensions.
  • the invention is based on the finding that an iatrogenic prosthetic occlusion after incorrect bite produces an eccentric, i.e., destabilizing condyle position or condyle displacement. For example, it was recognized that an incorrect movement pattern, with the ultimate goal of maximum occlusion, is at the expense of the temporomandibular joint, which cannot keep its own position rather leaves its position to adapt to the system.
  • the neuronal contact position on the tooth is the starting point and the endpoint for the expansion spaces that have been incorporated in a targeted manner in the movement (the course of the occlusion). All movements on the occlusal surfaces are gently for the guidance of the temporomandibular joint in a physiological position out of an effective central ICP and mean relief for the entire system, including the joints.
  • the tooth replacement according to the invention allows all occlusion movements to be performed perfectly.
  • the centric jaw relation i.e., the physiological mapping of the lower jaw to the upper jaw, is critical in all areas of prosthetics and has a central importance for the success of the prosthetic restoration.
  • the tooth replacement according to the invention secures this physiological position of the temporomandibular joints in the ICP and thus of the stomatognathic system as a whole.
  • the keys (right and left temporomandibular joints) find their correct occlusion position, fixed by the occlusal lock to the correct functional posterior teeth (FT). In the temporomandibular joint in conjunction with the neuromuscular system these will hold the keys in their desired position (physiological position).
  • the specifications for the design of tooth replacement according to the invention were formed using an additive wax-up technique in a fully adjustable articulator “type Protar”.
  • Provisos from scientific studies have been empirically implemented in a waxed mold and following first tests to verify the required functional freedoms of the quadrants digitized in the laboratory and milled from PMMA plastic. This process allows the optimization of the occlusal surfaces according to scientific principles. In this context, a good centric allocation of jaw halves contributes to fixing a healthy temporomandibular joint position.
  • the tooth replacement according to the invention was developed with the goal of dynamic occlusal guidance in order to improve masticatory performance, stabilization of the prostheses, pleasant wearing comfort and reducing the risk of pressure sores, whereupon the special occlusion concept has emerged.
  • the movements on the tooth replacement according to the invention run smoothly without interruptions, with correct setup information without grinding off, very evenly, both on the right and on the side. It is possible to make restorations that are at maximum level in term of functionality and aesthetics.
  • the tooth replacement according to the invention was obtained by the development and use of a system for measurement of jaw movements.
  • a tooth replacement was created taking into account these scientific findings.
  • Scientific provisos have been empirically implemented in a waxed mold and following first tests to verify the required functional freedoms of the quadrants digitized in the laboratory and milled from PMMA plastic. Using these prototypes measurements and tests have been performed and documented in a scientific experiment addressing the question of functionality in terms of the findings described. The data and facts gained therefrom had an influence on a revision of the prototype and were then checked again. In doing so, the optimization according to the invention of the occlusal surfaces was achieved according to scientific criteria.
  • the tooth replacement has at least two adjacently arranged teeth, especially posterior teeth, of which one having a mesial contact surface can be contacted with a distal contact surface of another tooth, characterized in that the mesial (distal) contact surface is curved convexly in a calotte-like or spherical manner, thus having a convex edge both in a sagittal plane and in a transverse plane, and the distal (mesial) contact surface is curved concavely spherically for producing a form-fit contact with the convexly curved contact surface, thus having a concave edge both in a sagittal plane and in a transverse plane.
  • the mesial and distal contact areas that can be contacted are designed have the shape of a spherical shell segment, so as to ensure form-fit contact to one another in all tooth positions.
  • this enables the adaptation of the tooth replacement to the particular anatomy of the patient, on the other hand it produces a form-fit contact between adjacent teeth in the area of the mesial and distal contact surfaces in all teeth positions, so that the desired anatomically predetermined position of the teeth can be reliably obtained.
  • the loosening of individual teeth in a plastic support which is occasionally observed in conventional tooth replacements is reliably excluded by the development of the mesial and distal contact surfaces according to the invention.
  • the radius of curvature of the convexly curved contact surface which preferably is the mesial contact surface, is approximately equal to the radius of curvature of the concavely curved contact surface, said concave contact surface being preferably formed by the distal contact surface.
  • the tooth cross-section decreases stepwise, starting from the tooth crown in the direction of the tooth root in the area of the tooth neck.
  • the lower retention with laterally acting forces caused by the stepwise reduction of the cross section is more than offset, surprisingly, by the support of the transition from tooth crown to the tooth root in the tooth area in the area of the steps, so that overall improved anchorage of the tooth in the base material is obtained.
  • the translucence of the tooth necks through the plastic support is prevented by the stepped tooth neck.
  • a recessed shoulder between the tooth crown and tooth root is understood to be a shoulder, which is constituted that to a connection line between a boundary surface of the tooth root and the tooth crown in the area of the tooth neck extends outside of the tooth body.
  • a particularly reliable retention of the replacement teeth in the support material is achieved, when the shoulder between tooth crown and tooth root is implemented revolving around the entire periphery of the tooth, so that in the area of the transition between tooth crown and tooth root a circumferential contact face of the tooth is formed on the support material.
  • the invention can be used particular advantageously with entire replacement teeth.
  • the variability described in the adaptation of replacement teeth to the anatomical conditions of the patient can, however, already be achieved if crowns of adjacent teeth are implemented with approximal contact surfaces, of which one is convexly curved and the other is concavely curved for producing a form-fit contact.
  • the shape of the approximal contact surfaces for a tooth replacement according to the invention is optimized for a form-fit contact and thus increased in comparison to the approximal contact areas of natural teeth.
  • the circularly stepped dental neck used in a preferred embodiment of the invention improves the fixing in the base and facilitates papillae design.
  • FIGS. 2 , 6 and 9 The design of the occlusal surfaces of the posterior teeth of the tooth replacement according to the invention is illustrated particularly well in FIGS. 2 , 6 and 9 .
  • the fissure base is only relatively slightly curved. This results in a smooth transition between gradients and central fissure.
  • the base of the tooth pit is only relatively slightly curved.
  • the occlusal surfaces are continuously concavely curved in a frontal plane passing through the cusps starting from the first gradient through the central fissure to the second gradient.
  • the central fissure has no convex portions, so that in occlusion position no keyed point-to-point toothing is obtained, rather the patient is provided through a small sliding clearance in the sense of a dynamic occlusion the possibility of neuromuscular setting of his temporomandibular joint centric.
  • the gradients have no areas with steep slopes in the direction of the cusp tips. This leads to a dynamic occlusion in laterotrusion movements.
  • the central fissure has a minimum depth over the full tooth width. This leads to a dynamic occlusion in protrusion and retrusion.
  • the pit is not particularly deep in relation to the tooth width, which leads to the unimpeded functioning of the replacement teeth.
  • the deepest point of the tooth pit is not the point of greatest curvature of the pit. In other words, the tooth pit is flat at the bottom. This facilitates dynamic sliding movement starting from the occlusion position.
  • FIG. 7 shows particularly clearly that the mesial contact surface of tooth 36 is implemented curved convexly so that it fits form-fit to the distal contact surface of tooth 35 .
  • All teeth of the row of teeth of FIG. 7 have a circumferentially stepped tooth neck, so that the tooth cross-section decreases stepwise, starting from the tooth crown in the direction of the tooth root in a shoulder implemented in the area of the tooth neck.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Prostheses (AREA)
US14/232,881 2011-07-14 2012-07-16 Tooth replacement Abandoned US20140295375A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE202011103184 2011-07-14
DE202011103184.9 2011-07-14
PCT/EP2012/002987 WO2013007397A2 (fr) 2011-07-14 2012-07-16 Prothèse dentaire

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/002987 A-371-Of-International WO2013007397A2 (fr) 2011-07-14 2012-07-16 Prothèse dentaire

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/596,554 Continuation US10456226B2 (en) 2011-07-14 2017-05-16 Tooth replacement

Publications (1)

Publication Number Publication Date
US20140295375A1 true US20140295375A1 (en) 2014-10-02

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ID=46651448

Family Applications (2)

Application Number Title Priority Date Filing Date
US14/232,881 Abandoned US20140295375A1 (en) 2011-07-14 2012-07-16 Tooth replacement
US15/596,554 Expired - Fee Related US10456226B2 (en) 2011-07-14 2017-05-16 Tooth replacement

Family Applications After (1)

Application Number Title Priority Date Filing Date
US15/596,554 Expired - Fee Related US10456226B2 (en) 2011-07-14 2017-05-16 Tooth replacement

Country Status (5)

Country Link
US (2) US20140295375A1 (fr)
EP (1) EP2731539B1 (fr)
CN (1) CN103841918B (fr)
DE (1) DE202012006877U1 (fr)
WO (1) WO2013007397A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014110154A1 (de) * 2014-07-18 2016-01-21 Heraeus Kulzer Gmbh Dentalprothese zur Bestimmung von Abrasionsfacetten
EP3597143B1 (fr) * 2018-07-16 2021-07-07 Ivoclar Vivadent AG Prothèse dentaire

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445863A (en) * 1982-08-30 1984-05-01 Lang Brien R Artificial teeth
US5326262A (en) * 1992-12-01 1994-07-05 Jorgenson H Grant Method of making cuspless artificial dentition
US5395238A (en) * 1990-01-19 1995-03-07 Ormco Corporation Method of forming orthodontic brace
US5733125A (en) * 1995-03-10 1998-03-31 Ivoclar Ag Denture
US5951289A (en) * 1994-09-09 1999-09-14 Kura; Guenter Artificial posterior tooth for the human teeth
DE10163105A1 (de) * 2001-12-23 2003-07-03 Zahn Spektrum Entwicklungsgese Zahnsatz
WO2009044443A1 (fr) * 2007-10-01 2009-04-09 Kabushiki Kaisha Shofu Dent artificielle facilitant l'occlusion bilatérale équilibrée
US20100035208A1 (en) * 2008-08-01 2010-02-11 Yusei Kadobayashi Artificial teeth
US20100040997A1 (en) * 2008-08-01 2010-02-18 Yusei Kadobayashi Artificial teeth
US20100151419A1 (en) * 2008-12-16 2010-06-17 Yusei Kadobayashi Artificial teeth
US20100151424A1 (en) * 2008-12-17 2010-06-17 Yusei Kadobayashi Artificial molar teeth
US20110045441A1 (en) * 2009-08-21 2011-02-24 Yusei Kadobayashi Artificial molar teeth
US8403669B2 (en) * 2007-04-18 2013-03-26 Kabushiki Kaisha Shofu Artificial tooth
US9173724B2 (en) * 2010-06-25 2015-11-03 Kabushiki Kaisha Shofu Occlusal adjustment system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE23607E (en) * 1952-12-30 Artificial denture
GB490852A (en) * 1937-02-23 1938-08-23 Ernest Leon Pilkington Improvements in or relating to artificial teeth and methods of forming them
US2620562A (en) * 1949-02-12 1952-12-09 Austenal Lab Inc Artificial tooth
US3277575A (en) * 1964-03-26 1966-10-11 Walter S Stasiw Artificial denture
US4626215A (en) * 1985-08-12 1986-12-02 Clarke Clifford R Mastication-enhancing protrusion
DE19837748B4 (de) * 1998-08-20 2007-06-06 Dental Consulting Mönkmeyer S.L. Zahnsatz
DE59809740D1 (de) * 1998-12-15 2003-10-30 Fundamental Schulungslabor Arn Zahnersatz mit auch für Prothesen geeigneten künstlichen Zähnen
EP1099420A3 (fr) * 1999-11-11 2003-04-09 Yamahachi Shizai Kogyo Kabushiki Kaisha Prothèses dentaires et fausses dents
JP4603218B2 (ja) * 2001-09-30 2010-12-22 株式会社松風 操作性の良い人工歯
US6935861B2 (en) * 2003-01-13 2005-08-30 Ivoclar Vivadent, Ag Sets of posterior teeth

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445863A (en) * 1982-08-30 1984-05-01 Lang Brien R Artificial teeth
US5395238A (en) * 1990-01-19 1995-03-07 Ormco Corporation Method of forming orthodontic brace
US5326262A (en) * 1992-12-01 1994-07-05 Jorgenson H Grant Method of making cuspless artificial dentition
US5951289A (en) * 1994-09-09 1999-09-14 Kura; Guenter Artificial posterior tooth for the human teeth
US5733125A (en) * 1995-03-10 1998-03-31 Ivoclar Ag Denture
DE10163105A1 (de) * 2001-12-23 2003-07-03 Zahn Spektrum Entwicklungsgese Zahnsatz
US7267549B2 (en) * 2001-12-23 2007-09-11 Dental Consulting Monkmeyer S.L. Set of teeth
US8403669B2 (en) * 2007-04-18 2013-03-26 Kabushiki Kaisha Shofu Artificial tooth
US8128404B2 (en) * 2007-10-01 2012-03-06 Kabushiki Kaisha Shofu Artificial teeth easily enabling bilateral balanced occlusion
WO2009044443A1 (fr) * 2007-10-01 2009-04-09 Kabushiki Kaisha Shofu Dent artificielle facilitant l'occlusion bilatérale équilibrée
US20100035208A1 (en) * 2008-08-01 2010-02-11 Yusei Kadobayashi Artificial teeth
US20100040997A1 (en) * 2008-08-01 2010-02-18 Yusei Kadobayashi Artificial teeth
US8758014B2 (en) * 2008-08-01 2014-06-24 Kabushiki Kaisha Shofu Artificial teeth
US20100151419A1 (en) * 2008-12-16 2010-06-17 Yusei Kadobayashi Artificial teeth
US20100151424A1 (en) * 2008-12-17 2010-06-17 Yusei Kadobayashi Artificial molar teeth
US20110045441A1 (en) * 2009-08-21 2011-02-24 Yusei Kadobayashi Artificial molar teeth
US9173724B2 (en) * 2010-06-25 2015-11-03 Kabushiki Kaisha Shofu Occlusal adjustment system

Also Published As

Publication number Publication date
CN103841918A (zh) 2014-06-04
EP2731539A2 (fr) 2014-05-21
CN103841918B (zh) 2016-11-09
US20170319306A1 (en) 2017-11-09
EP2731539B1 (fr) 2017-03-08
DE202012006877U1 (de) 2012-10-22
WO2013007397A3 (fr) 2013-08-29
WO2013007397A2 (fr) 2013-01-17
US10456226B2 (en) 2019-10-29

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Owner name: ARNOLD, WOLFGANG, GERMANY

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Effective date: 20140424

STCB Information on status: application discontinuation

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