Appl. No.: 16/043,065
`Reply to Final Office Action of October 30, 2020
`
`Attorney Docket No.: 22773-826.303
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`Amendments to the Claims:
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`This listing of claims will replaceall prior versions, andlistings of claims in the application:
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`Listing of Claims:
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`1-29.
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`(Canceled)
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`30.
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`(Currently Amended) A multilayer dental appliance comprising teeth receiving
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`cavities shaped to directly receive at least some of a patient’s teeth and applyaresilient positioning
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`force to the patient’s teeth, the appliance comprising:
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`a soft polymer layer comprising a thermoplastic polyurethane elastomer having an ultimate
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`tensile strength of greater than about 5000 psi, an elongation at break of greater than about 200%,
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`[[and]] a hardness of about 60 A to about 85 D, and a flexural modulusof greater than about 35,000
`
`psi; and
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`a hard polymer layer comprising a co-polyester having a tensile modulus greater than
`
`150,000 psi and a flexural modulus greater than about 150,000 psi.
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`31.
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`(Previously Presented) The multilayer dental appliance of claim 30, wherein the
`
`hard polymerlayer has a hard polymerlayer elastic modulus and the soft polymerlayer has a soft
`
`polymerlayer elastic modulusless than the hard polymerlayer elastic modulus.
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`32-35. (Canceled)
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`36.
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`(Previously Presented) The multilayer dental appliance of claim 30, wherein the
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`soft polymerlayer has a light transmission between 400 nm and 800 nm ofgreater than about 75%.
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`37.
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`(Previously Presented) The multilayer dental appliance of claim 30, wherein the
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`soft polymer layer further comprises a material selected from the group consisting of: a silicone
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`rubber, an elastomeric alloy, a thermoplastic elastomer (TPE), a thermoplastic vulcanizate (TPV)
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`elastomer, a block copolymer elastomer, a polyolefin blend elastomer, a thermoplastic co-
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`polyester elastomer, and a thermoplastic polyamide elastomer, or any combination thereof.
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`38.
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`(Canceled)
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`Page 4 of 17
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`Appl. No.: 16/043,065
`Reply to Final Office Action of October 30, 2020
`
`Attorney Docket No.: 22773-826.303
`
`39.
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`(Previously Presented) The multilayer dental appliance of claim 30, wherein the
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`soft polymer layer comprises more than one polymerlayer.
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`AO.
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`(Previously Presented) The multilayer dental appliance of claim 30, wherein the
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`hard polymerlayer further comprises a polymerselected from the group consisting of: a polyester,
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`a thermoplastic polyurethane, a polypropylene, a polyethylene, a polypropylene and polyethylene
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`copolymer, an acrylic, a polyetheretherketone, a polyamide, a polyethylene terephthalate, a
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`polybutylene terephthalate, a polyetherimide, a cyclic block copolymer, a polyethersulfone, and a
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`polytrimethylene terephthalate, or any combination thereof.
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`41-47. (Canceled)
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`48.
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`(Previously Presented) The multilayer dental appliance of claim 30, wherein the
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`hard polymerlayer has a tensile strength at yield between 4000 psi and 6500psi.
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`49.
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`(Currently Amended) A plurality of incremental position adjustment appliances
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`having teeth receiving cavities shaped to directly receive at least some of a patient’s teeth and
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`apply a resilient positioning force to the patient’s teeth, wherein the appliances are shaped to move
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`teeth from one arrangement to a successive arrangement when successively worn by the patient,
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`and wherein at least one of the appliances comprises:
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`a soft polymer layer comprising a thermoplastic polyurethane elastomer having an ultimate
`
`tensile strength of greater than about 5000 psi, an elongation at break of greater than about 200%,
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`[[and]] a hardness of about 60 A to about 85 D, and a flexural modulusof greater than about 35,000
`
`psi; and
`
`a hard polymer layer comprising a co-polyester having a tensile modulus greater than
`
`150,000 psi and a flexural modulus greater than about 150,000 psi.
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`50-57. (Canceled)
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`58.
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`(Currently Amended) A method of moving a patient’s teeth from an initial
`
`configuration towards a target configuration, the method comprising:
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`Page 5 of 17
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`Appl. No.: 16/043,065
`Reply to Final Office Action of October 30, 2020
`
`Attorney Docket No.: 22773-826.303
`
`providing a removable orthodontic tooth positioning appliance having teeth receiving
`
`cavities shaped to directly receive at least some ofthe patient’s teeth; and
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`placing the removable orthodontic tooth positioning appliance on the teeth of the patient to
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`apply a resilient positioning force to the patient’s teeth and thereby move the teeth toward the
`
`target configuration, wherein the appliance comprises:
`
`a soft polymer layer comprising a thermoplastic polyurethane elastomer having an
`
`ultimate tensile strength of greater than about 5000psi, an elongation at break of greater than about
`
`200%, [[and]] a hardness of about 60 A to about 85 D, and a flexural modulusof greater than about
`
`35,000 psi; and
`
`a hard polymer layer comprising a co-polyester having a tensile modulus greater
`
`than 150,000 psi and a flexural modulus greater than about 150,000 psi.
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`59-61. (Canceled)
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`62.
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`(Previously Presented) The method of claim 58, wherein the hard polymer layer
`
`has an elongation at yield of greater than about 4%.
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`63.
`
`(Previously Presented) The method of claim 58, further comprising fabricating the
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`removable orthodontic tooth positioning appliance.
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`64-68. (Canceled)
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`69.
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`(Previously Presented) The method of claim 58, wherein the soft polymer layer
`
`comprises more than one polymerlayer.
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`70.
`
`(Canceled)
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`71.
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`(Previously Presented) The multilayer dental appliance of claim 30, wherein the
`
`appliance comprises three polymerlayers of alternating hardness.
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`72.
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`(Previously Presented) The multilayer dental appliance of claim 39 having a
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`thickness of between 500 jm and 1200 um.
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`Page 6 of 17
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`Appl. No.: 16/043,065
`Reply to Final Office Action of October 30, 2020
`
`Attorney Docket No.: 22773-826.303
`
`73.
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`(Previously Presented) The method of claim 69, wherein the appliance has a
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`thickness of between 500 pm and 1200 um.
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`74.
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`(Previously Presented) The plurality of incremental position adjustment appliances
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`of claim 49, wherein the hard polymerlayer has a hard polymerlayer elastic modulusandthe soft
`
`polymerlayer has a soft polymer layer elastic modulus less than the hard polymerlayerelastic
`
`modulus.
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`75.
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`(Previously Presented) The plurality of incremental position adjustment appliances
`
`of claim 49, wherein the appliance comprises three polymer layers, wherein the three polymer
`
`layers comprise the soft polymer layer and hard polymerlayer.
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`76.
`
`(Previously Presented) The plurality of incremental position adjustment appliances
`
`of claim 75, wherein the three polymer layers comprise layers of alternating hardness.
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`77.
`
`(Previously Presented) The plurality of incremental position adjustment appliances
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`of claim 75, wherein at least one appliance has a thickness of between 500 um and 1200 iim.
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`78.
`
`(Previously Presented) The method of claim 58, wherein the hard polymer layer
`
`has a hard polymerlayer elastic modulusand the soft polymerlayer has a soft polymerlayerelastic
`
`modulusless than the hard polymerlayer elastic modulus.
`
`79.
`
`(Previously Presented) The method of claim 58, wherein the soft polymerlayer has
`
`a compression set greater than 40% after 24 hours at 70° C.
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`80.
`
`(Previously Presented) The method of claim 58, wherein the soft polymerlayer has
`
`a light transmission between 400 nm and 800 nm ofgreater than about 75%.
`
`81.
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`(Previously Presented) The method of claim 58, wherein the hard polymerlayer
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`has an elongation at break of greater than about 70%.
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`82.
`
`(Previously Presented) The method of claim 58, wherein the hard polymer layer
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`has a stress relaxation of greater than about 10% at 24 hourstesting at a relative humidity of
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`Appl. No.: 16/043,065
`Reply to Final Office Action of October 30, 2020
`
`Attorney Docket No.: 22773-826.303
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`between 90% and 100%.
`
`83.
`
`(Previously Presented) The method of claim 58, wherein the hard polymerlayer
`
`has a light transmission between 400 nm and 800 nm of greater than about 75%.
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`84.
`
`(Previously Presented) The method of claim 58, wherein the hard polymerlayer
`
`has a tensile strength at yield between 4000 psi and 6500psi.
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`85.
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`(Previously Presented) The method of claim 69, wherein the three polymerlayers
`
`comprise layers of alternating hardness.
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`86.
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`(Previously Presented) The multilayer dental appliance of claim 30, wherein the
`
`hard polymer layer comprises more than one polymerlayer.
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`87.
`
`(Previously Presented) The method of claim 58, wherein the hard polymerlayer
`
`comprises more than one polymerlayer.
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`88.
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`(Previously Presented) The multilayer dental appliance of claim 30, wherein the
`
`soft polymer layer has a compression set greater than 40% after 24 hours at 70° C.
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`Page 8 of 17
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