Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2646622 A
Publication typeGrant
Publication dateJul 28, 1953
Filing dateJun 17, 1950
Priority dateJun 17, 1950
Publication numberUS 2646622 A, US 2646622A, US-A-2646622, US2646622 A, US2646622A
InventorsBottemiller Merton M, Christie Donald R
Original AssigneeBottemiller Merton M, Christie Donald R
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Dental matrix apparatus
US 2646622 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

July 28, 1953 D. a. CHRISTIE Erm. 2,646,622


7 WM @mm Patented `uly 28, 1953 V UNITED STATES PATENT CJFFICIELv nonalam chris-gemid Mmmmnbttemiuel-,L

l Wadena, Minn.

3f Claims.

The* presentI invention is particularly concerned with dental matrix apparatus Iof the type desig'nedv for use in' the filling of cavities.` in anterior t'eeth. It is common `practice to' ll cavities in the anterior teeth with either a' porcelainl or plastic materiali which resembles the vnitte'd the tape to" move a bit, then the' filling tended `to `be unsatisfactory;` With thef newer plastic filling materials, the setting time is"` sufcieiitly long thatthe time required' for the" tape to be held in place becomes a substantial portion `of `the total time requiredv for filling 4the tooth.

`Anf object of the present invention: is to* provide a matrix band and clamp whichY may be used with" fillings in anterior teeth `and will remain in place without` continued" manual assistance'.` l l A further o'bjectzof the'present invention is tot provide such a matrix band and clampr in whichthe band is adhesively maintained in'place whilel `the clamp isT being applied;

Astill further@ object ofthe invention is to provide such a zmatrix band apparatus in which the clamp is so formed as to be readily placeable in clamping position.

These and the other objects of our invention, which will be apparentfrom the following description, are' accomplished by providingsa` tape which has adhesive on theend portionsthereof and an intermediate portion free of adhesive whichis placed against thefilling, with the adhesive ends of thetape doubledY over and pressed into adhesive engagement with thetoothbeing iilledV and with one 'or more adjacent teeth; The clamp is sol formed as=to be placed into engage- `ment` with the tape closely adjacent the' iilling, but# overlying the adhesive portion of the tape' so as to' cause the tape to adhere even more firmly tothetooth being filled.` Further details ofthe invention will be` described in connection with the accompanying drawing of which Figure l isan isometric view of' our improved matrix tape or band;

Figure 2 isl a verticali sectional'l ViewV of? the clamp forming` part? ofi our matrix band apteeth;

Figure 3` is* af transverse'sectional view of the clamp, the" section being taken along the line 3&-3 of Figure 2:;

Fi'guref 4- is a' view showing a number of an'- terioi' teetlr including one of which has been drilled for adilling,A and w'itl'r` our improved matrix band iii,A position for the insertion of the filling material, the view beingk taken` from the reaiside of `the teeth;i

Figure 5 is a frontl view of the'same' teeth as shown in Figure 4, showing a filling' material in position in the cavity; Y i

Figure 6 isal front View of the same teeth with the free end of the bandK loopedV over the cavity and pressed'` into' engagingv relation withp the Figure 7 is` a-view showing'the clamp in position; and- Figure 8 is ai sectional View of the clamping facesl of: the clamplfthe tape, and the teeth.`

Referringv to' the drawing,y the matrix band of our invention is' designatedby the reference numeral I'D, and isbest shown in Figure l; The bandY t0- consists" of atape Hi having the end=por tions thereofA coveredwitli adhesive layers l2 and t3'. Thetape- Hf is' preferably formed of some transparent-l plastic;` material such as' cellophane. The adhesive layer l2- is covered` with a protective` tape ['45, and layer I3' with a` similar protec-` tive'ft'ape |51 `The-adhesive layers l2 and I3'may take any suitable form. For example, they maS7 bein the form of a double coated tapeyone surfacef of' which is pressedf into" engagement with the" tape' H; O-rfthe adhesive layer may take' the formof asimple layer applieddireetly to the tape lil. tis to'be noted that theadhesive portions IZiand l3'terminate adjacent the central portion I6 ofthe tape.'` Itis this-adhesive-free, central portion whichl is designeditobe` placed adjacent the'lling'. i Since it is not desired'that the tape adheretol the'lling proper; this portion is not adhesive; the thickness of the layers" isH exaggerated in the drawing andl thaty in actual" practice, there is no substantial difference inthickness between the adhesive-coated' portions and' the central portion*` IG: l

Referring noW'to-the clamp, this is bes'tshown iniFigures- 2f,` 3;` and-7. The clamp, `which' is designated inits'entire'ty by the'reference numeral 20, isformed of' afstripZ-l of' resilient metalhavingagu-shaped body portion 22 and two end clamping-por'tionsHandit;r Rigdly secured to oneyleg ofthe U-shaped bodyfportion 22, isa rod 2T terminating: in aifiiiigerv piece 28. Securedv to the other leg of the body portion 22' of strip 2l,

It-istobe understood, of course, that the strip 2 I.

` filling.

is another rod 38, terminating in a finger piece 29. Rod Sil extends through an elongated slot 32 in the leg to which rod 2l is fastened, so that nger pieces 28 and 29 are opposite to each other and may be conveniently engaged by thumb and forenger.

Secured to the adjacent faces of clamping portions 23 and 24 are a pair of rubber clamping members 34 and 35, respectively. These clamping members have opposed spherically curved faces and are formed of yieldable material having an abrasive therein. The purpose of the abrasive is to cause the clamping members to remain in position on the plastic tape l l and not to slide with respect thereto. i

` 1t will be readily apparent from the dottedliney position of a portion of the clamping member, vas

shown' in Figure 2, that by grasping the ngerpieces 28 and 29 between the thumb and forezn'nger and squeezingthem together, the upper leg Aof .the strip 2l is flexed upwardly. to cause separation of the clamping members 3ft` and35. This permits the clamp to 'be vplaced in position. ,Upon

frelease vof vtheiingerpieces 28 and 29, the clamping members 34 and 35 are moved. `together into clamping relationby .reason of .the resilience rof Since the clamp may be manipulated by the iingers of one hand, .the other hand position while Vthe clamp is being applied.

Referring now to Figure 4,'. the band It! is shown partially. applied in connectionv with a lling in one of the upper anterior teeth. The view Ais taken'as though therupper jaw were swung back through an angle of about 135 for convenience in viewing` the cavity The' tooth being iilled is designated by the numeral 40. The teeth onthe 'left side (opposite the cavity)` are designated by numerals 4i', 42; and 43 while that on the right side of the tooth is indicated by numeral M. The cavity is indicated by numeral 48 and it will be assumed that the cavity of Figure 4 has been drilled and properly treated for receiving the As shown in Figure 4, the tape l has had the covering strip .It removed so as to expose the adhesive layer 2. The strip has been placed in position with the intermediate portion i6 adjacent to the lling it and with adhesive layer l2 rmly pressed against the rear surfaces of teeth tata, and s2.

. Referring now to Figure 5, the same upper anterior teeth are shown from the .front with the illing material dil in position in the cavity. This @ling material may be of these-called porcelain type or the newer plastic type. As indicated by the drawing, the filling material has been applied with the righthand portion of the band Iii movedA back out of the way of the cavity.

As also indicated in the drawing, the filling material 49 is applied to the cavity in a quantity such as to project slightly beyond the normal contour of the `cavity preparation.

The protective strip l '5 is now removed, exposing the adhesive layer i3. At the same time the righthand end of the strip is drawn around the tooth dil, spreading out the lling material 49, as shown in Figure 6. The adhesive layer I3 of the band is then pressedfinto engagement With the forward surface of the teeth. The band is now in the position shown in Figure 6. Due to the absence of any adhesive or other covering material on the intermediate portion I6, this portion is transparent. Hence, a good View is obtained through this portion of the filling 49 as the band lil is pulled. into position. i

vtl'iefscop'e of the appended claims.;

While the band tends to remain in the position shown in Figure 6 due to the adhesive layers I 2 and I3, it is desirable to clamp the band in position. The ngerpieces 28 and 29 are squeezed together to separate the clamping jaws 34 and 35, as best shown in dotted lines in Figure 2. The clamp can then be placed in position adjacent the cavity. Upon the ngerpieces 28 and 29 being released, the clamping faces 34 and 35 are pressed rmly into engagement with the band l0 to hold the band in engagement with the tooth. A portion `of the clamping faces 34 and 35 Will overliethe adhesively coated portions of band l0 to maintain the transparent portion of the band in close adherence to the tooth 40. yThe relation of the clamping jaw surfaces 34 and 35 to the band I 0 andthe teeth is best indicated in the sectional view of Figure 8. It will be seen from. this view that the band I 0 is held in close engagement kwith the tooth so that,the filling is molded s0 asto conformfwithuthe,.contoulqf the .tooth. Since the clamp is mechanical,1 the pressure maintained; on band l ll willA be .constant throughout, and thereis no4 tendency for-...the rband toshift as Aoccasionallyhappens Whengthe bandis` manuallyheld.. The; abrasive inthe clamping members v3!! and 35, furthermora pre,.- vents any shiftingof the c1amp on the band.,-

1 Due 4to the angle` at .which the i, clamping.. p0rtion 24 extendslwith respect to the; body portion 22, the" latter tends to project forwardly in ,the mouth. and hence clears the .opposing `jaw... 'ljhis is desirable'in that itaids in placingthe clamp vin position. The ,sphericallycurved surfaces .of

furthermore be' seen thatthis is `accomplished by the use of va* relatively simple type of `band and a clamp of simple construction which is readily manipulatable.'.withonly onehand.

1 While we have. shovmaispecicformof our in"- vention for purposes of illustration,.it is. to -be understood thattheinventioniis limited only. by

We claim as ourninvention:

11A dental "matrix comprising 'a longhand of relatively uniform'width and formed*` ofithin flexible material having adhesive' material on the end portions thereof and having an intermediate portionfree of adhesive for the full width of the bandand adapted to engage a lling, said band beingadapted to be looped around a tooth with the intermediate non-adhesive portion engaging a lling and with the adhesive portions adhering to the tooth.

" 2. A dental matrix band of thin ilexible mate- `rial of a length at least three times the Width of a normal anterior tooth and of relatively uniform width, said handhaving adhesive material on the end portions thereof `and having an intermediate portion free of adhesive for the full width of the band and adapted to engage a iilling, said band'being adapted to be looped around a tooth with the intermediate non-adhesiveportion engaging a lling and'wth the adhesive portions adhering to the tooth being filled and at least vone tooth .-adjacent thereto. 1

3. A dental matrix comprising a long-bandfof relatively uniform Width and formed of thin exible transparent material having adhesive material on the end portions thereof and having an intermediate portion free of adhesive for the full Width of the band, said band being adapted to be looped around a tooth with the intermediate non-adhesive portion engaging a illing and with the adhesive portions adhering to the tooth, the lling being visible through the intermediate non-adhesive transparent portion.



References Cited in the file of this patent UNITED STATES PATENTS Number Name Date Emerson Aug. 24. 1915 Zurbrigg May '7, 1918 Burlew Aug. 18, 1925 Parkin Dec. 30, 1941 Weil June 4, 1946

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1151253 *Apr 2, 1915Aug 24, 1915Charles J EmersonDental matrix-retainer.
US1265581 *May 7, 1917May 7, 1918L D Caulk CompanyMatrix for use in tooth restoration.
US1550425 *Aug 6, 1924Aug 18, 1925Burlew Gilderoy OMeans for protecting fillings from moisture
US2267836 *Apr 27, 1940Dec 30, 1941Parkin Ernest VMatrix and holder therefor
US2401714 *Nov 3, 1943Jun 4, 1946Rudolf WeilFinger cap
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3082531 *Oct 23, 1961Mar 26, 1963Jacobson Robert JDental matrix strip
US3250003 *Dec 8, 1960May 10, 1966Collito Michael BOrthodontic method
US4536155 *Sep 15, 1983Aug 20, 1985Ireland Edward JDental matrix band
US4997367 *May 15, 1989Mar 5, 1991Kassel Larry IDental matrix
US5607302 *Aug 24, 1995Mar 4, 1997Garrison; John E.Matrix retainer apparatus for dental restorations
US5620322 *Jul 27, 1995Apr 15, 1997Lococo; MichaelDental matrix strip
US6293796Oct 27, 1999Sep 25, 20013M Innovative Properties CompanyDental matrix clamp for tooth restoration procedures
US6336810Sep 28, 1999Jan 8, 2002Danville MaterialsRing for use in preparing teeth for restoration
US7537450Oct 26, 2001May 26, 2009Dentsply Canada Ltd.Interproximal tooth coating applicator
US8381742Jan 24, 2011Feb 26, 2013Leonard G. LorchDental floss
US8814571Apr 17, 2009Aug 26, 2014Dentsply Canada Ltd.Interproximal tooth coating applicator
US20020081550 *Oct 26, 2001Jun 27, 2002Naim KarazivanInterproximal tooth coating applicator
US20040152039 *Oct 9, 2003Aug 5, 2004Clegg Mary L.Dental adhesive strip
WO1984001100A1 *Sep 15, 1983Mar 29, 1984Edward IrelandImproved dental matrix band
WO2004069077A2 *Dec 31, 2003Aug 19, 2004Mary L CleggDental adhesive strip
U.S. Classification433/39, 433/162
International ClassificationA61C5/12, A61C5/00
Cooperative ClassificationA61C5/125
European ClassificationA61C5/12M