Appl. No.: 17/553,590
`Reply to Advisory Action of June 15, 2023
`Amendmentdated July 14, 2023
`
`Attorney Docket No.: 22773-826.309
`
`AMENDMENTSTO THE CLAIMS
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`This listing of claims will replace all prior versions, and listings of claims in the
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`application:
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`Listing of Claims:
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`1.
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`2.
`
`(Canceled)
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`(Currently Amended) A method of making a multilayer dental aligner for repositioning a
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`patient’s teeth from a first arrangement toward a second arrangement, the method comprising:
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`providing a multilayer sheet comprising:
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`a first layer;
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`a second layer; and
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`a third layer; and
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`wherein the first layer consists ofa first polymer having:
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`a flexural modulus greater than 150,000 psi; and
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`an elongation at break of greater than 70%; [[and]]
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`
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`wherein the second layer consists of a second polymer different than the first
`
`polymer, wherein the second polymeris a thermoplastic polyurethane elastomer having:
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`a hardness from 60A to 85D;_and
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`an elongation at break of greater than 200%; [[and]]
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`
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`providing a mold;
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`thermoforming the multilayer sheet over the mold to form a plurality of tooth-receiving
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`cavities configured to receive and reposition the patient’s teeth from the first arrangement toward
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`the second arrangement; and
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`trimming excess material from the thermoformed multilayer sheet to form the dental
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`aligner.
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`Page 2 of 8
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`Appl. No.: 17/553,590
`Reply to Advisory Action of June 15, 2023
`Amendmentdated July 14, 2023
`
`Attorney Docket No.: 22773-826.309
`
`3.
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`(Previously Presented) The method of claim 2, wherein the first polymer is a co-
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`polyester.
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`4.
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`(Previously Presented) The method of claim 3, wherein the first polymer has a tensile
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`strength yield of 4000 psi to 6500 psi.
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`5.
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`(Previously Presented) The method of claim 3, wherein the first polymer has an
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`elongation at yield of greater than 4%.
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`6.
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`(Previously Presented) The method of claim 3, wherein the first polymer has a tensile
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`modulus of greater than 150,000psi.
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`7-9.
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`(Canceled)
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`10.
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`(Previously Presented) The method of claim 2, wherein the thermoplastic polyurethane
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`elastomer has an ultimate tensile strength of greater than 5000psi.
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`11.
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`(Previously Presented) The method of claim 2, wherein the first polymer has an elastic
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`modulusgreater than the thermoplastic polyurethane elastomer.
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`12.
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`(Previously Presented) The method of claim 2, wherein the first polymer is a co-
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`polyester; and wherein the third layer comprises a third polymer, wherein the third polymeris a
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`sameor different co-polyester as the first layer.
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`13.
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`(Previously Presented) The method of claim 2, wherein the first polymer is a co-
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`polyester; and wherein the third layer comprises a third polymer, wherein the third polymeris a
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`sameor different thermoplastic polyurethane elastomeras the secondlayer.
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`
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`14._—_(Previously Presented) The method of claim 13, wherein the first layer is disposed
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`between the second layer and the third layer.
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`15.
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`(Previously Presented) The method of claim 2, wherein the first layer is disposed between
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`the secondlayer and thethird layer.
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`Page 3 of 8
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`Appl. No.: 17/553,590
`Reply to Advisory Action of June 15, 2023
`Amendmentdated July 14, 2023
`
`Attorney Docket No.: 22773-826.309
`
`16.
`
`(Currently Amended) A method of making a multilayer dental aligner for repositioning a
`
`patient’s teeth from a first arrangement toward a second arrangement, the method comprising:
`
`providing a multilayer sheet comprising:
`
`a first layer;
`
`a second layer; and
`
`a third layer; and
`
`wherein the first layer consists of a co-polyester; and
`
`wherein the second layer consists of a thermoplastic polyurethane elastomer, the
`
`thermoplastic polyurethane elastomer having:
`
`a hardness from 60A to 85D;_and
`
`an elongation at break of greater than 200%; [[and]]
`
`
`
`providing a mold;
`
`thermoforming the multilayer sheet over the mold to form a plurality of tooth-receiving
`
`cavities configured to receive and reposition the patient’s teeth from the first arrangement
`
`towards the second arrangement; and
`
`trimming excess material from the thermoformed multilayer sheet to form the dental
`
`aligner.
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`17.
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`(Previously Presented) The method of claim 16, wherein the third layer comprises a co-
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`polyester.
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`18.
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`(Previously Presented) The method of claim 16, wherein the third layer is disposed
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`adjacentto the first layer.
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`19.
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`(Previously Presented) The method of claim 18, wherein the third layer is co-extruded
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`with or laminatedto the first layer.
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`20.
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`(Previously Presented) The method of claim 16, wherein the multilayer sheet further
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`comprises a fourth layer comprising a thermoplastic polyurethane elastomer.
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`Page 4 of 8
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`Appl. No.: 17/553,590
`Reply to Advisory Action of June 15, 2023
`Amendmentdated July 14, 2023
`
`Attorney Docket No.: 22773-826.309
`
`21.
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`(Previously Presented) The method of claim 20, wherein the first layer and the third layer
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`are disposed between the second layer and the fourth layer.
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`22.
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`(Previously Presented) The method of claim 20, wherein the third layer comprises a
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`thermoplastic polyurethane elastomer.
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`23.
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`(Previously Presented) The method of claim 22, wherein the first layer is disposed
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`between the second layer and the third layer.
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`24.
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`(Previously Presented) The method of claim 16, wherein the co-polyester ofthe first layer
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`has a flexural modulus greater than 150,000 psi.
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`25.
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`(Previously Presented) The method of claim 16, wherein the co-polyester ofthe first layer
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`has an elongation at break of greater than 70%.
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`26.
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`(Previously Presented) The method of claim 16, wherein the co-polyester ofthe first layer
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`has an elongation at yield of greater than 4%.
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`27.
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`(Previously Presented) The method of claim 16, wherein the co-polyester ofthe first layer
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`has a tensile strength yield of 4000 psi to 6500 psi.
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`28.
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`(Previously Presented) The method of claim 16, wherein the co-polyester ofthe first layer
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`has having a tensile modulus of greater than 150,000 psi.
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`29.
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`(Previously Presented) The method of claim 16, wherein the co-polyester ofthe first layer
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`has a light transmission between 400 nm and 800 nm of greater than about 75%.
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`30.
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`(Previously Presented) The method of claim 16, wherein the thermoplastic polyurethane
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`elastomerof the second layer has a compression set of greater than 40% after 24 hours at 70° C.
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`31-32. (Canceled)
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`Page 5 of 8
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`Appl. No.: 17/553,590
`Reply to Advisory Action of June 15, 2023
`Amendmentdated July 14, 2023
`
`Attorney Docket No.: 22773-826.309
`
`33.
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`(Previously Presented) The method of claim 16, wherein the co-polyester has an elastic
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`modulus greater than the thermoplastic polyurethane elastomer.
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`34.
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`(New) The method of claim 1, wherein the first polymerhasa light transmission between
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`400 nm and 800 nm of greater than about 75%, and wherein the thermoplastic polyurethane
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`elastomerhasa light transmission between 400 nm and 800 nm ofgreater than about 75%.
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`35.
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`(New) The method of claim 16, wherein thermoplastic polyurethane elastomer hasa light
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`transmission between 400 nm and 800 nm of greater than about 75%.
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`Page 6 of 8
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