USRE46553E1 - Dental contact matrix limited - Google Patents

Dental contact matrix limited Download PDF

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Publication number
USRE46553E1
USRE46553E1 US12/320,112 US32011209A USRE46553E US RE46553 E1 USRE46553 E1 US RE46553E1 US 32011209 A US32011209 A US 32011209A US RE46553 E USRE46553 E US RE46553E
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US
United States
Prior art keywords
lug
wedge
retainer
matrix
ridge
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.)
Expired - Lifetime, expires
Application number
US12/320,112
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English (en)
Inventor
Simon Paul McDonald
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TRI-DENT INNOVATIONS Ltd
Trident Innovations Ltd
Dentsply Sirona Inc
Original Assignee
Dentsply Sirona Inc
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 NZ51552801A external-priority patent/NZ515528A/en
Application filed by Dentsply Sirona Inc filed Critical Dentsply Sirona Inc
Priority to US12/320,112 priority Critical patent/USRE46553E1/en
Assigned to TRI-DENT INNOVATIONS LIMITED reassignment TRI-DENT INNOVATIONS LIMITED NUNC PRO TUNC ASSIGNMENT EFFECTIVE DATE: 01/16/09. Assignors: MCDONALD, SIMON P.
Assigned to Trident Innovations Limited reassignment Trident Innovations Limited NUNC PRO TUNC ASSIGNMENT (SEE DOCUMENT FOR DETAILS). Assignors: MCDONALD, SIMON P.
Assigned to TRIODENT HOLDINGS LIMITED reassignment TRIODENT HOLDINGS LIMITED CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: Trident Innovations Limited
Assigned to DENTSPLY INTERNATIONAL INC. reassignment DENTSPLY INTERNATIONAL INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TRIODENT HOLDINGS LIMITED
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Publication of USRE46553E1 publication Critical patent/USRE46553E1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C5/00—Filling or capping teeth
    • A61C5/80—Dental aids fixed to teeth during treatment, e.g. tooth clamps
    • A61C5/88—Wedges
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C5/00—Filling or capping teeth
    • A61C5/80—Dental aids fixed to teeth during treatment, e.g. tooth clamps
    • A61C5/85—Filling bands, e.g. matrix bands; Manipulating tools therefor

Definitions

  • the present invention relates to an apparatus for the placement of dental fillings and in particular light curable dental fillings.
  • a matrix which is a device which wraps around the tooth and acts as a mould to contain the composite resins before they are cured.
  • Matrices are generally formed of plastic or stainless steel and are either circumferential or sectional. Sectional matrices fit only in one proximal area of the tooth while circumferential matrix bands fit around the entire circumference of the tooth. In the prior art matrixes are secured in place by the use of wedges and/or clamps. Wedges are generally made of wood or plastic and are placed between the matrix and an adjacent tooth. Wedges are used to hold the matrix against the tooth being filled and to temporarily separate the tooth being filled and the adjacent tooth.
  • the present invention consists in a retainer for placing and retaining a matrix in a dental contact matrix system, and for use in conjunction with an elastic “wedge”, said retainer comprising:
  • a first lug to fit on one side of a proximal contact between two teeth
  • a spring member connecting between said first lug and said second lug, said spring member holding said lugs such that they must be separated to fit over said proximal contact, wherein the spring member applies a restorative force pressing said lugs against opposed sides of said proximal contact, and
  • Elastic “wedge” refers to any resilient elastic member for introduction into the inter-proximal space between two teeth in a stretched condition, subsequent release of the stretched condition leading to a lateral expansion of the wedge within the inter-proximal space.
  • the present invention consists in a dental contact matrix system including a retainer for placing and retaining a matrix in a dental contact matrix system, an elastic “wedge” and a matrix, said retainer comprising:
  • a spring member connecting between said first lug and said second lug, said spring member holding said lugs such that they must be separated to fit over said proximal contact, wherein the spring member applies a restorative force pressing said lugs against opposed sides of said proximal contact,
  • said elastic wedge being held in a stretched condition spanning between said first lug and said second lug.
  • the present invention consists in a retainer for placing and retaining a matrix in a dental contact matrix system, and for use in conjunction with an elastic “wedge”, said retainer comprising:
  • a first lug to fit on one side of a proximal contact between two teeth
  • a first matrix support member positioned to retain a matrix against said first lug
  • a spring member connecting between said first lug and said second lug, said spring member holding said lugs such that they must be separated to fit over said proximal contact, wherein the spring member applies a restorative force pressing said lugs against opposed sides of said proximal contact.
  • This invention may also be said broadly to consist in the parts, elements and features referred to or indicated in the specification of the application, individually or collectively, and any or all combinations of any two or more of said parts, elements or features, and where specific integers are mentioned herein which have known equivalents in the art to which this invention relates, such known equivalents are deemed to be incorporated herein as if individually set forth.
  • FIG. 1 is a three-dimensional view of the dental matrix system according to the present invention.
  • FIG. 2 is a three-dimensional view of the dental matrix system according to the present invention showing the lugs mounted an alternative way.
  • FIG. 3 is an end view of the dental contact matrix system of the present invention.
  • FIG. 4 is an alternative end view of the dental contact matrix system of the present invention.
  • FIG. 5 is a three-dimensional view of the spring of the present invention.
  • FIG. 6 is an alternative three-dimensional view of the spring of the present invention.
  • FIG. 7 is a top plan view of the spring of the present invention.
  • FIG. 8 is a side view of the spring of the present invention.
  • FIG. 9 is a three dimensional view of one of the lugs of the present invention.
  • FIG. 10 is a three dimensional view of the other lug of the present invention.
  • FIG. 11 is a three dimensional view of the lug of the present invention viewing the lug from the bottom.
  • FIG. 12 is a plan view of the bottom of the lug of the present invention.
  • FIG. 13 is a top plan view of the lug of the present invention.
  • FIG. 14 is a side view of the lug of the present invention.
  • FIG. 15 is a back-view of the lug of the present invention.
  • FIG. 16 is a front view of the lug of the present invention.
  • FIG. 17 is a three dimensional view of the matrix of the present invention.
  • FIG. 18 is a front view of the matrix of the present invention.
  • FIG. 19 is a side view of the matrix of the present invention.
  • FIG. 20 is a top plan view of the matrix of the present invention.
  • FIG. 21 is a three dimensional view of the wedge of the present invention.
  • FIG. 22 is an end view of the wedge of the present invention.
  • FIG. 23 is a side view of the wedge of the present invention.
  • FIG. 24 is an alternative side view of the wedge of the present invention.
  • FIG. 25 shows the contact matrix dental system of the present invention in place.
  • the dental contact matrix system includes a retainer with a spring 101 and two lugs 110 attached to the spring 101 .
  • a matrix 130 is held in place by lugs 110 and an elastic wedge 120 is wrapped under the two lugs 110 and the spring 101 .
  • the retainer includes means for receiving and holding the elastic wedge in a stretched condition.
  • the preferred means include a guide on each lug in the form of channels 119 .
  • the means also include a wedge engagement associated with each lug. In the preferred embodiment these are cleats 105 .
  • spring 101 is generally semi circular or U-shaped in plane view.
  • the spring has two arms 102 under tension.
  • the arms 102 require force to push them apart.
  • the dental professional pushes the arms 102 apart using rubber dam forceps or another similar tool.
  • Each arm 102 has a protrusion 103 to stop the rubber dam forceps from slipping while they are used to expand the spring 101 .
  • Each arm 102 has an oval shaped hole or socket 104 to enable the lugs 110 to be attached to the spring 101 .
  • the use of an oval shape hole 104 prevents the lugs from rotating relative to the arms 102 .
  • a channel 105 in each arm allows for the elastic wedge 120 to be attached to the spring 101 and cleated.
  • the channel 105 includes a narrow neck through which narrow sections of the wedge can squeeze.
  • Many alternative forms of connection for the ends of the wedge to the retainer can also be envisaged, including connection to the lugs rather than the spring member.
  • the present form provides the advantage that the elastic wedge also servers to secure the lugs to the spring member when assembled Spring 101 is formed of material such as plastic or metal.
  • each lug 110 is connected to the spring 101 by an oval shaped plug or dowel 111 that fits into the socket 104 in the arms 102 of the spring 101 .
  • Each lug 110 is detachable from the spring 101 but in use each lug is attached to a spring arm 102 .
  • the lugs are mirror images of each other.
  • FIG. 9 shows one lug 110 and
  • FIG. 10 shows the mirror image lug.
  • each lug 110 is wedge shaped to enable it to fit in proximal contact between two teeth.
  • Lug faces 112 in use abut the tooth being filled and the neighbouring tooth.
  • the lug faces are in the preferred embodiment concave so as to adapt to the inter-proximal space between teeth.
  • a ridge 113 at the intersection of the faces projects into the inter-proximal space between the two teeth. In use one lug fits on the lingual side and the other lug on the buccal side.
  • the lugs 110 connect to the spring 101 , so that in general the placement of the spring path is substantially perpendicular to the line of ridge 113 .
  • the sockets 104 in the spring are offset at an angle 160 shown in FIG. 8 so that the spring slopes up slightly from perpendicular. This enables the spring in use to be above neighbouring teeth to the tooth being filled.
  • the lugs could be taller so that the spring would clear neighbouring teeth. The path and position of the spring allow unobstructed viewing of the proximal contact.
  • Each lug 110 has a matrix holder to hold the matrix 130 in place.
  • the holder is a slot 114 used to retain the matrix 130 .
  • a support member 115 and a bottom 116 and top ledge 117 create the slot and retain the matrix 130 .
  • the support member 115 retains the matrix 130 against the tooth abutting face 112 .
  • a top ledge 115 117 enables pressure to be applied to the matrix 130 as the matrix is inserted into the inter-proximal space.
  • the top ledge, 115 117 runs from the support member 115 towards the ridge 113 .
  • the matrix 130 is able to horizontally slide within the slot 114 in the lugs 110 .
  • a further support member 118 aids in the retention to the matrix 130 by increasing the resistance to the matrix falling out of the slot
  • the face of the support member 118 that contacts the matrix 130 is further towards the face of support member 115 that contacts the matrix than the face 112 of the lug 110 , requiring the matrix to follow a controlled path between them.
  • the lugs 110 additionally have a channel 119 that in use runs from the ridge 113 .
  • the slot is substantially perpendicular to the spring arms 102 .
  • the wedge 120 is threaded through channels 119 of each lug to span across the gap between the lugs. Outward portions of the wedge 120 pass through channels 105 of the spring arm 102 and are cleated thereby.
  • the channel 119 of each lug is contoured in a “V” shape to enable the wedge to be inserted or threaded into the channel.
  • the lugs 110 are made of acetyl but could be made of any suitable plastic or metal in particular stainless steel. In the preferred embodiment the lugs 110 are transparent to enable light used to cure acrylic filling. A light shined from above the lugs will be reflected towards the filling to be cured as shown by arrow 150 in FIG. 14 .
  • the wedge 120 comprises a one piece member of elastic material such as rubber, polyurethane or other suitable material.
  • polyurethane is used as it has suitable elasticity properties but any other material that has like elasticity properties would be suitable. Suitable elasticity properties require the wedge to stretch approximately 40%.
  • the elastic wedge 120 has an elongate narrow section marked 901 and elongate tapered section marked 902 .
  • the narrow section 901 is a cylindrical section as seen in FIG. 22 .
  • the narrow section 901 has a diameter of 0.5 to 1.5 and a length of 10 to 15 millimeters.
  • an oval or other cross sectional shape could be used, but it is preferred that the shape is in general “round”. For example in the preferred circular form it has an aspect ratio of 1, and the minimum perimeter squared to area ratio of 4 ⁇ .
  • the elongated tapered section 902 has a maximum thickness of 3 to 5 millimeters and an approximate length of 10 to 15 millimeters.
  • the cross section shown in FIG. 22 is an equilateral triangle but any triangular or other shape would be also be suitable.
  • the faces of the tapered section are concave.
  • the elongated narrow section 901 has at the free end a bead 908 which is wider in cross section than the elongated narrow section.
  • flat section 906 In approximately the middle of the elongate narrow section 901 there is a flattened section 906 .
  • flat section 906 shown in FIG. 23 In its narrowest orientation flat section 906 shown in FIG. 23 has a thickness smaller than the thickness of the elongate narrow section 901 .
  • the flat section 906 In the broadest orientation of the flat section 906 shown in FIG. 24 the flat section 906 is wider than the thickness of the elongated narrow section 901 .
  • the flat section 906 of the elongated narrow section 901 is 3 to 8 millimeters long. The flat section 906 makes it easier for the dental professional to use the wedge of the present invention as it passes more easily between two teeth.
  • the wedge 120 is attached to the lugs 110 and the spring 101 in the following manner.
  • the narrow section 901 is fed through the cleat 105 in a first lug 110 with head 907 above the cleat 105 .
  • the wedge is passed across the channels 119 in the lugs 110 with the flat section 906 spanning the gap between the lugs.
  • the flat section 906 of the wedge will only fit into the channel 119 slot one way so that the flat section 906 is parallel to the matrix 130 . This can be seen in FIG. 4 .
  • the remaining portion of the narrow section 901 is laid across the channel 119 of the other lug 110 and forced into the cleat 105 with the bead 905 above the cleat 105 . This leaves the tapered section 902 of the wedge 120 free.
  • the use of bulbous members or beads on the ends of the wedge makes it easier for the dental professional to grip the ends of the wedge either with fingers or with tweezers for later release.
  • the matrix 130 of the present invention is formed of materials such as acrylic, thermoplastic or stainless steel.
  • Matrix 130 is formed such that an edge is shaped to conform to the contours of the inter-proximal gingival margin and in particular edge 136 which contacts the gum is curved outwardly from the centre of the matrix to enable the matrix to be used to file deep cavities.
  • the thickness 135 of the matrix 130 is selected so that it is suitable for insertion inter-proximal between teeth. The thickness should be selected so that it provides sufficient rigidly to permit insertion without damage to the matrix 130 .
  • the matrix of the present invention is between 0.2 and 0.7 millimeters.
  • the matrix 130 of the present invention has wings 132 that slide into the slots 114 of the lugs 110 so that the matrix 130 is held in place on the retainer.
  • the matrix 130 is made of stainless steel but brass or another suitable metal could be used.
  • a clear matrix or matrix that transmits light could be used. Clear matrices have the advantage that the transmit light to assist in the curing of filling.
  • a clear matrix could be made of polyester or other suitable plastic.
  • the dental contact matrix system of the present invention can be assembled either with the matrix facing into the centre of the U-shape seen generally in FIG. 1 or with the matrix facing away from the U-shape seen generally in FIG. 2 .
  • the ability to face the matrix either ways makes it easier for the dental professional to use the system as the appropriate assembly for the tooth to be filled can be selected. While the present invention has been described with the spring 101 and lugs 110 as separate components it would be possible to manufacture the components a one piece.
  • the dental professional expands the spring arms 102 . This also stretches the narrow section of the wedge 120 . In particular the narrow flat section 906 of the wedge 120 is stretched The retainer is then manipulated to place the narrow section of the wedge 901 and the matrix 130 into the inter-proximal space between two teeth.
  • the dental professional removes the rubber dam forceps the spring 101 contracts and the lugs 110 provide pressure to hold the matrix 130 against the lingual and buccal sides of the tooth to be filled.
  • the dental contact matrix system of the preferred embodiment of the present invention is shown in FIG. 25 in place.
  • the tooth to be filled 2501 and the adjacent tooth 2502 are shown.
  • the matrix 130 and narrow portion of the wedge 120 are between the teeth in the inter-proximal space 2503 .
  • the lugs 110 are pressing the matrix 130 (not visible) against the tooth surface 2505 thereby holding the matrix 130 in place.
  • Beads 908 and 903 make this process easier by preventing the tweezers from slipping off the wedge 120
  • the dental professional pulls on the elongated narrow section 902 and in particular bead 908 . This pulls the tapered section 902 into the inter-proximal space between the two teeth to better secure the matrix 130 against the tooth to be filled.
  • the elastic wedge causes continuous lateral pressure.
  • the lugs, wedge and matrix all transmit light enabling light used to cure the filling to reach the filling material. This has the advantage of enabling the filling to cure faster and to ensure a more complete cure.
  • wedge 120 of the present invention can be used separately to hold various types of matrix bands in place.
  • the dental professional would position their preferred matrix band or sectional matrix on the tooth to be filled in the usual manner using fingers and/or tweezers.
  • the dental professional would then elongate the narrow elongated section 901 of the wedge 120 by stretching it and placing the wedge between the matrix band and the adjacent tooth.
  • the wedge is placed in a similar fashion to the use of dental floss.
  • the dental professional then releases both ends and pulls on the narrow elongated section 901 to pull the elongated tapered section 902 through the gap so that the tapered section passes inter-proximally until the space is tight.
  • the present invention has the advantage that when the tension on the wedge 120 is released the elastic wedge 120 expands further increasing the pressure on the matrix band and on the adjacent teeth, thereby causing them to separate.
  • the elastic wedge of the present invention because it does not have a point and is pulled or threaded into the interproximal space, is gentler on the gingival tissue and thereby less traumatic for dental patients.
  • the present dental contact matrix system of the invention can be assembled before being placed in the patients mouth saving the dental professional time and reducing the chance of dropping a matrix or wedges into a patients mouth.

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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 Tools And Instruments Or Auxiliary Dental Instruments (AREA)
US12/320,112 2001-11-19 2002-11-19 Dental contact matrix limited Expired - Lifetime USRE46553E1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/320,112 USRE46553E1 (en) 2001-11-19 2002-11-19 Dental contact matrix limited

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
NZ51552801A NZ515528A (en) 2001-11-19 2001-11-19 A dental contact matrix system with an elastic wedge
NZ51594701 2001-12-06
NZ51703202 2002-02-07
US49512002A 2002-11-19 2002-11-19
US12/320,112 USRE46553E1 (en) 2001-11-19 2002-11-19 Dental contact matrix limited
PCT/IB2002/004824 WO2003043521A1 (fr) 2001-11-19 2002-11-19 Systeme matriciel de contact dentaire

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US49512002A Reissue 2001-11-19 2002-11-19

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USRE46553E1 true USRE46553E1 (en) 2017-09-19

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US10/495,120 Ceased US7175432B2 (en) 2001-11-19 2002-11-19 Dental contact matrix limited
US12/320,112 Expired - Lifetime USRE46553E1 (en) 2001-11-19 2002-11-19 Dental contact matrix limited

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US10/495,120 Ceased US7175432B2 (en) 2001-11-19 2002-11-19 Dental contact matrix limited

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US (2) US7175432B2 (fr)
EP (1) EP1455675A4 (fr)
AU (1) AU2002347456A1 (fr)
WO (1) WO2003043521A1 (fr)

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USD902410S1 (en) * 2018-09-28 2020-11-17 Ultradent Products, Inc. Matrix ring
USD945625S1 (en) 2019-09-30 2022-03-08 Pinkband Dental Solutions, Inc. Matrix band ring assembly for dental surgery
USD954266S1 (en) * 2019-03-27 2022-06-07 Ultradent Products, Inc. Dental matrix band
US11795209B2 (en) 2015-02-19 2023-10-24 Compugen Ltd. PVRIG polypeptides and methods of treatment
USD1043995S1 (en) * 2022-08-25 2024-09-24 Ultradent Products, Inc. Matrix ring

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US20080064003A1 (en) * 2006-09-13 2008-03-13 Clark David J Dental Matrix Devices And A Seamless, Single Load Cavity Preparation And Filling Technique
WO2008037250A1 (fr) * 2006-09-28 2008-04-03 Center For Odontological Developments Aps Bande de matrice dentaire préformée
DE102007013402B4 (de) 2007-03-20 2010-04-01 Berthold Otto Apparaturenset für das Setzen der Matrize, das Adaptieren, das Retention geben und die Gewährleistung der Zahnseparierung bei unterschiedlichen Zahnrestaurationen sowie deren Verwendung
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US8529258B2 (en) * 2008-02-20 2013-09-10 Garrison Dental Soultions Dental implement for tooth restoration
US20110171596A1 (en) 2010-01-14 2011-07-14 Clark David J Dental Wedge
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US9358080B2 (en) 2012-03-26 2016-06-07 David J. Clark Dental separator ring
US20130344455A1 (en) * 2012-06-06 2013-12-26 Garrison Dental Solutions Dental implements
CA2884823C (fr) * 2012-09-18 2021-09-21 Dentsply International Inc. Organe de retenue de bande pour matrice dentaire ameliore
US8899979B2 (en) * 2013-02-28 2014-12-02 Garrison Dental Solutions Matrix ring for tooth restoration
CA2951197C (fr) 2014-06-04 2022-07-19 David J. Clark Cale dentaire
USD763449S1 (en) * 2014-12-16 2016-08-09 Ultradent Products, Inc. Dental matrix ring
USD747809S1 (en) * 2014-12-18 2016-01-19 Garrison Dental Solutions, Llc Dental instrument
US11712324B2 (en) * 2015-05-12 2023-08-01 David J. Clark Dental separator device
USD773053S1 (en) 2015-07-30 2016-11-29 Garrison Dental Solutions, Llc Dental ring
US9775686B2 (en) 2015-12-07 2017-10-03 Beverly Agnew Dental dam clamp
ITUA20164949A1 (it) * 2016-06-16 2017-12-16 Matteo Scabbiolo Dispositivi di supporto modellazione e ancoraggio di matrici dentali
US20180263728A1 (en) * 2017-03-20 2018-09-20 Young Microbrush, Llc Matrix ring for tooth restoration
USD823473S1 (en) 2017-03-20 2018-07-17 Young Microbrush, Llc Dental matrix ring
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CN114271965A (zh) * 2021-11-24 2022-04-05 唐山恒新医疗器材有限公司 一种自适应式成形片夹持环
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AU2002347456A1 (en) 2003-06-10
EP1455675A1 (fr) 2004-09-15
US20040265779A1 (en) 2004-12-30
EP1455675A4 (fr) 2006-05-24
WO2003043521A1 (fr) 2003-05-30
US7175432B2 (en) 2007-02-13

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