CA2131830C - Soft resilient interocclusal dental appliance, method of forming same and composite for same - Google Patents

Soft resilient interocclusal dental appliance, method of forming same and composite for same Download PDF

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Publication number
CA2131830C
CA2131830C CA002131830A CA2131830A CA2131830C CA 2131830 C CA2131830 C CA 2131830C CA 002131830 A CA002131830 A CA 002131830A CA 2131830 A CA2131830 A CA 2131830A CA 2131830 C CA2131830 C CA 2131830C
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Prior art keywords
appliance
composition
butyl methacrylate
soft
polymer
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CA002131830A
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French (fr)
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CA2131830A1 (en
Inventor
Sherman L. Watson
Jimmie J. Jones
Richard W. Moore
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/08—Mouthpiece-type retainers or positioners, e.g. for both the lower and upper arch
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
    • A61F5/56—Devices for preventing snoring
    • A61F5/566—Intra-oral devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
    • A61F5/56—Devices for preventing snoring

Abstract

A unitary plural-material, interocclusal dental appliance (10) is disclosed for use in connection with orthodontic/orthopedic treatment of the teeth and jaws of a patient's mouth.
The appliance includes a first region (14) made from a first material that provides a relatively hard expanse with first and second surfaces, and with the second surface being contactable by one such set of teeth The second surface may be constructed with a substantially planar shape, or with a shape conforming generally to the cusps of such one set of teeth. A second region (16) is joined to the first region (14) and is made from a second material that provides a relatively soft, persistently resilient enclosure for the other such set of teeth. Additionally, a curable composition for making a soft, persistently resilient dental appliance is disclosed and it includes a polymer component including butyl methacrylate monomer.

Description

v WO 93/17631 PCT/US93/02159 SOFT RESILIENT INTEROCCLUSAL DENTAL APPLIANCE, METHOD
OF FORMING SAME AND COMPOSITE FOR SAME
hack ,ground and Summar~of the Invention The invention relates generally to dental appliances and synthetic compositions used to make them. More particularly, the invention concerns an improved interocclusal appliance which provides improved appliance retention and precise vertical and lateral positioning of the mandible, as well as a method of forming such appliance, and a curable composition for making dental appliances such as the invented appliance.
Interocclusal appliances, commonly referred to as splints, are well known, and are 'used to secure or hold in proper position (or desired range of positions) the mandible of a patient. Splints may be used for orthodontic treatment, as well as for orthopedic treatment of the bone, joints and supporting tissue associated with the mouth.
For example, splints are used to treat various conditions including temporo-mandibular joint (TMJ) dysfunction syndromes, myofascial pain w "'H'°" dysfunction syndrome, and symptomatic or asymptomatic loss of tooth structure from subconscious parafunctional mandibular habits known as bruxism (grinding) or clenching. Splints are also used to reduce wear on teeth caused by metal or porcelain dental restorations during normal, functional or parafunctional mandibular movement. Splints may also be used as anti-snoring devices to resolve snoring problems and obstructive sleep apnea (OSA).
Several unimaterial, conventional splints have been proposed but there are certain problems common to all of them. First, none of the so-called "soft" splints remain soft over time. Conventional splints harden over time due to their composition and/or due to leaching out of unreacted plasticizers present in them. Such hardening is a drawback because soft, resilient splints are preferred. Soft splints are preferred because they are more comfortable to wear than hard appliances, and because they provide improved retention of the splint held by the teeth.
A second drawback associated with such splints is that they are notoriously imprecise in terms of vertical and lateral positioning of the mandible under desired patient-bite conditions before they harden. Precise vertical and lateral positioning of the mandible is critical to proper orthodontic/orthopedic treatment. The section of conventional soft splints that is sandwiched by opposing sets of teeth is imprecise because it "gives" an irregular amount when the patient bites down under normal pressure, resulting in reduced TMJ stability in all dimensions.
Certain proposals have been made to make splints and other dental appliances out of two materials with differentiated hardnesses. Apparently, the idea is to use harder material in such appliances where harder material is needed and softer material where it is needed. For example, such proposals have been made in U.S. Patent No.
4,448,735 to Huge, U.S. Patent No. 3,404,056 to Baldwin, U.S. Patent No. 2,934,823 to Preis and U.S. Patent No. 2,789,351 to Gordon. However, none of the prior art proposals has been effective in overcoming the above-identified problems for splints.
Accordingly, the present invention has been developed to provide an improved composition for a soft, persistently resilient, interocclusal dental appliance.
The present invention provides such a composition that can be used for a dental appliance to impart in it the characteristic of being relatively soft and persistently resilient at mouth temperature for the working life of the appliance.
The present invention also provides an improved splint that adequately grasps the teeth of the user while also precisely retaining the mandible and/or TMJ
in a desired position.
The present invention also provides an improved splint that accommodates an immediate and accurate fit with the desired set of teeth jacketed by it and with the opposing set of teeth in contact with it.
The present invention provides an improved dental appliance that is comfortable to wear.
The present invention also provides a method of forming a plural-material interocclusal dental appliance from a unimaterial version of such appliance.
The invention also provides such an appliance that can be easily and cost-effectively manufactured.
Accordingly, the present invention provides a soft, persistently resilient interocclusal dental appliance, comprising:
a body made from an injectable, curable composition, with the composition including a polymer component consisting essentially of butyl methacrylate polymer, a monomer component consisting essentially of butyl methacrylate monomer, an effective amount of polymerizing agent and with the composition being sufficiently liquid to allow it to be injectable.
The present invention also provides a soft, persistently resilient interocclusal dental appliance, comprising:
a body made from an injectable, curable composition, with the composition including a polymer component made substantially of butyl methacrylate polymer, a monomer component made substantially of butyl methacrylate monomer, and an effective amount of polymerizing agent.
Accordingly, the present invention provides a soft, persistently resilient interocclusal dental appliance, comprising:
a body made from a curable composition, with the composition including a polymer component made substantially of butyl methacrylate polymer, a monomer component made substantially of butyl methacrylate monomer, an effective amount of polymerizing agent, and with the composition being sufficiently liquid to allow it to be injectable.
The present invention also provides a soft, persistently resilient) plural-material, interocclusal dental appliance, comprising:
a body including a hard region and a soft region, and with the soft region being made from a curable composition that includes a polymer component made substantially of butyl methacrylate polymer, a monomer component made substantially of butyl methacrylate monomer, an effective amount of polymerizing agent, and with the soft region formed from the composition being bondable to the hard region.
The present invention also provides an injectable, curable composition for making a soft, persistently resilient interocclusal dental appliance, comprising:
a polymer component consisting essentially of butyl methacrylate polymer;
a monomer component consisting essentially of butyl methacrylate monomer;
an effective amount of polymerizing agent; and with the composition being sufficiently liquid to allow it to be injectable.
The present invention also provides an injectable, curable composition for making a soft, persistently resilient interocclusal dental appliance, comprising:
a polymer component made substantially of butyl methacrylate polymer;
a monomer component made substantially of butyl methacrylate monomer;
an effective amount of polymerizing agent; and with the composition being sufficiently liquid to allow it to be injectable.
The present invention also provides an injectable, curable composition for making a soft, persistently resilient region of a plural-material, interocclusal dental appliance, which appliance also includes a hard region, comprising:
a polymer component made substantially of butyl methacrylate polymer;
a monomer component made substantially of butyl methacrylate monomer;
an effective amount of polymerizing agent; and with the composition being bondable to the hard region.
In a further aspect, the present invention provides a temporo-mandibular joint dysfunction appliance comprising:
a generally U-shaped body including a relatively hard occlusal layer having opposing first and second occlusal surfaces, with the first surface being bonded to a relatively soft jacketing section for jacketing one such set of teeth, and the second surface being contactable by the other such set of teeth;
the jacketing section being formed from a curable composition for making a soft, persistently resilient appliance, the composition having a polymer component including butyl methacrylate polymer, and a monomer component including butyl methacrylate monomer; and the jacketing section being formed with plural openings for allowing adjacent jacketed teeth to contact the first surface and, upon desired biting by the patient, to penetrate into the occlusal layer for a relatively precise distance, and with such penetration defining lateral borders in the occlusal layer around such teeth so that the appliance accommodates relatively fixed lateral and vertical positioning of such enclosed teeth upon desired biting action by the patient.

4a These and other features and advantages of the invention will be more clearly understood from a consideration of the accompanying drawings and the following description of the preferred embodiment.
Brief Description of the Drawings In the interest of clarity, it will be appreciated that the preferred embodiment of the invention is illustrated and described consistently, with respect to orientation, relative to its use in a patient's mouth. Thus, the orientation of the dental appliance illustrated in Figs. 1 through 6 is described using anatomical terminology, as though the appliance were positioned in the mouth.
Fig. 1 is a top view of the preferred embodiment of the invention which is in place in the mouth of a patient, showing the upper teeth of the patient located in the appliance but blocking out all remaining portions of the mouth.
Fig. 2A is a right, buccal side view of the preferred embodiment of the invention shown in Fig. 1 with certain portions of the mouth shown.
Fig. 2B is a right, buccal side view similar to Fig. 2A only showing a second embodiment of the invention.
Fig. 3 is a fragmentary sectional view through line 3-3 of Fig. 1 which also shows portions of the gums and jaw of the mouth as well as a pair of opposing teeth.
Fig. 4 is a sectional view through lines 4-4 of Fig. 3.
Fig. 5 is like Fig. 3 only slightly more fragmentary and showing a third embodiment of the invention.

j. . , t. : t ;::.::
~~ 3130 F=w WO 93/ 17b31 PCT/ US93/02159 ~ . , Detailed Description of the Preferred Embodiment Figs. 1 and 2A depict top and side views of the invented unitary, plural-material interocclusal dental appliance, made in accordance r~ith its preferred embodiment and indicated at 10. Preliminarily, it should be understood i. .

S that appliance 10 may also be thought of as a TMJ dysfunction appliance.
As will be understood; appliance la may be used by a patient for orthodontic/orthopedic tPeatment of the teeth, joints and bone associated with a patient's mouth.

Focusing first on Fig: 1, appliance 10 preferably has a generally U-shaped body 12. The inner U-shaped border 12a of body 12 corresponds to the tongue or lingual side ' of the appliance and the outer U-shaped border 12~

corresponds to the cheek or buecal side of the appliance.

Referring to Figs. 2=3, body 12 includes a first region 14, also referred to as an occlusal layer or a relatively hard occlusal Layer, joined to a second region 16, also referred to as a jacketing section. Further discussion of techniques for f~rming body 12 wilt follow soon. As for joinder of the two regions, such joinder rxiay be accomplished by any suitable method such:
as by bonding them together. First region 14 is formed from a first material and second region 16 is formed from a second material; and both materials will be more particularly 'described below:

H.eferring to digs. ZA and 3, first region 14 takes the form of an expanse 18 with first end second surfaces 18a, 18b_, respectively. Preferably, expanse 18 is constructed with a substantially glanar second surface 18 ~ but, as shown iri Fig. 28, a second embodiment of the invention is hown as an appliance 110 whRCh includes expanse :118 being or~ed with' a second surface 118 that conf~rms to the cusps of the lower teeth. The significance of edryst~ucting second surface 118 to conform with the cusps of the lower teeth will be described below.

Referring again to Fig. 3, second urface 18b is contactable by ~ne set of teeth; uch: as the patient's lower teeth; one of which is sh~wn at 20 in Fig:

3. Second region 16 takes the form of an enclosure (or jacketing section) for the patient's opposing set of teeth, such as the upper teeth, one of which is shown at 2 2. It should of course be understood that appliance 10 may be formed so that the jacketing section is usable on either the upper or lower set of teeth.

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WO 93/17631 ~ ~ ~ ~ PCl'/US93/02159 ~-~~. j.

Referring to teeth 20 and 22, each includes corresponding roots 20~, 22,~
which are shown positioned in lower and upper jaws 24, 26, respectively. Each tooth also includes corresponding cusps 20b, 22b_. Each cusp may be thought of as having a top 20_c, 22~ and sides 20d, 22d, respectively.
S Referring to Figs. 3-4, one can see that second region 16 is formed with plural zones 28 which preferably take the form of openings that allow cusps 22~ to contact first surface 18a of first region 18. Zones 28 may also be thought of as means for providing communication between selected ones of jacketed teeth (such as tooth 22 of Fig. 3) and first surface 18a of planar expanse .18.
Referring for a moment to Fig. 5, a third embodiment of appliance is shown at 210 which includes plural zones 228 formed as relatively thin sections, i.e. with a thickness of about 0:5mm -l:Omm.
Referring to Figs. 3 arid S zones 28 and 228 each allow cusps 22~, 222; to penetrate into first region I4, 214, respectively. Such penetration will be discussed further, but first it is important to understand certain details about the first and second material from which first and second regions 14, I6 (Fig. 3) are formed; respectively:
Referring again o Figs. 1-3, first region l4 may be forriied of any suitable relatively hard material than will allow teeth to penetrate into it only a relatively small, yet precise amount. Preferably, the first material is formed from known curable; acrylic=based polymer formulations that are commonly used in the field of orthodontics; such as polymethyl.methacrylate (PM1VIA.). PMhZA, when cured, has a hardness that is greater than the to-be-described second material which is used to form second region 16:
Still referring to Figs.1-3second region l6 is formed from a second material dvhich forms another aspect of the present invention. This second material is characterized by ~ curable composition that is usable to make a soft, persistently resilient dental appliance. The composition includes a polymer , component including butyl methacrylate polymer, and a monomer component including butyl methacrylate monomer. Preferably, the polymer component is about 20-80% by volume of the composition.
One example of a suitable composition for the second material is:

Butyl Methacrylate polymer (BMA-P) lOg (935m1) Butyl Methacrylate monomer (BMA-M) 13.4m1 Benzoyl Peroxide 0.2g (O.lSml) The butyl methacrylate polymer (BMA-P) is available from E.I. Du Pont de Nemours & Co., Inc. and is marketed under the trademark ELVACTTE
2044. The butyl methacrylate monomer (BMA-M) is available from Rohm and Haas Co. Benzoyl ;peroxide is available from Spectrum Chemical Mfg. Corp. of Gardena, California.
The above example composition may be mixed with suitable mixing means and, once mixed, is in a liquid state. A suitable mold may be formed using conventional processes such as those disclosed in U.S. Patent No. 4,654,006 to Kusano et al., U.S. Patent No. 4,080,412 to Colpitts et al. and U.S. Patent No.
2,859,088 to Erdle et al., The IS liquid composition is injectable into the mold cavity by using a suitable syringe with suitable pressure, and then a curing operation is followed to form the desired appliance.
The ,newly formed appliance is persistently resilient based on in-mouth aging tests performed on appliances made from the above-described curable composition. Such tests gave the following results:
A~nliance A Appliance B
Age 3 wks. old - unused 52 wks. old - used Hardness*
(Shore D) 68.8 (73° F) 68.8 (73° F) 58.8 (99° F) 59.2 (99° F) *Hardness readings for the above tests were averaged from seven readings taken at random locations.
Prior to forming the unitary, plural-material interocclusal appliance of the present invention, certain conventional steps are followed and then certain novel steps are also performed, the latter forming another aspect of the invention.
The conventional steps involve the usual unimaterial dental-appliance-molding techniques disclosed in the above patents. These conventional techniques are also known as a "lost wax" method of forming a dental appliance.

i.3...
W~ 93117631 ~ ~ ~ ~ PCT/US93l02159 .~r y Briefly, the techniques involve forming a suitable cavity in a mold (also called a flask) that corresponds to the shape of the desired splint. A
wax pattern of the splint is formed and placed in a desired .position on a.,stone impression of a desired set of the patient's teeth. Then, the impression and wax S pattern are placed in a suitable mold with sprees, which is then filled with a suitable material; such as a hydrocolloid material. Thereafter, the mold is put in a heated water bath to boil out the wax pattern and also to solidify the hydrocolloid material: The resulting mold includes a cavity that defines the desired splint:
The novel steps of the invention include certain improved steps practiced in conxiection with the above conventional molding techniques. The above conventional techniques are usable to form a unimaterial interocclusal dental appliance in the corresponding cavity of the mold. The improved steps are practiced t~ form a unitary plural-material, interocclusal denial appliance from IS such unimaterial one.
Fr~an an overview, the method of the invention involves (1) removing a first section of the conventionally formed unimaterial ihterocclusal dental appliance to expose a surface of a second section of it, (2) putting such unim~terial appliance back in the mold so that a void is defined by the removed first section;' (3) filling the void with curable material that is different from the material used to form such u~imaterf al ' appliance, and ' (4) wiring the newly formed appliance so that. the two materials band together along: the surface of the second' region, thus to' form a unitary plural-material, interocclusal dental ;
appliance with the first section made from material that is different from the ~5 second section.
Nov~r focusing on further details of the method, after conventionally Forming and curing the unimaterial appliance it is removed from the mold and ~-;
cooled: Such aplaliance mould have the appearance of appliance 10 of Figs. 1, ~.
and 3, only ;that it would be made solely of one material (such as the above-~:: .
ident~ed novel composition) instead of being made of trio materials with corresponding regions like regions 14, IS. If the above-identified novel a composition is used, it may be injected into the mold via the sprees and cured by ,~... . .. , .,.~". :~~

., , ;
;~'.
dV~ 93/I7631 - ~~ PCT/~LJ593/02i59 placing the filled mold in a heated water bath (160° F) for about two hours at 20 p.s.i.
It should be understood that appliance 10 in Fig. 3, which is a finished product, is now being used to further detail the steps used to practice the S method of the invention. Generally, such steps involve forming a plural-material appliance (appliance 10) from a unimaterial appliance (undepicted). ~7Vith reference to Fig. 3, imagine that it depicts a fragmentary section of stone teeth and gums; and a unixnaterial appliance fitted on the upper stone teeth, all of which reside in a conventional mold (undepicted). Such unimaterial appliance would look like appliance ,l0 of Fig. 3 except that it would be unimaterial instead of having two regions l4; 16 made from different materials. Next, according to the method of the invention, the uninnaterial appliance would be removed from the mold and a first section of it (corresponding to first region 14) would be removed W ith a suztable cutting device to expose a surface in a second section of it (corresponding to second region 16). Such exposed surface would correspond to the second-region side of the interface between first and second regions 14, 16 in F'ig. 1: The result of such removal step ~,vould be to form zones in the uniynateriaZ appliance like zone; or openings; 28 (Figs. 3 and 4).
Then, the rennainder of such unimaterial appliance is put back in the mold end a void is formed being defined by the just removed section of the appliance: For example; again referring to Fig: 3; the just cut ~unimateri~l appliance would be gut back in the rnol~ in a position like that of appliance with region 16 jacketing upper teeth such as tooth 22. I-Iowever, the just cut unimaterial appliance would not here a section corresponding to region 14 ., because that would have been removed by the removing step. Next, suitable liquid PMMt~ is injected into the conventional mold (undepicted) via sprees to .
fill the void. Such liquid does not flaw up through the openings in the surface of ', the second region because the stone teeth block such flow. To understand such t'v relative positi~ning of the stone teeth and second section, Fig. 3 is again used to illustrate that $he stone teeth would be positioned like upper tooth 22, which is ;'v x seated in region 16 (corresponds to the second section of the unimaterial v appliance). The cusps of tooth 22 block holes 28 by covering them.

f,. :.:
;;,,;;
CVO 93J17633 ~ ~ ~ PCT/LJS93102159 ..= .., Continuing with the description of the method of the invention, the conventional acrylic-based polymer in the mold is cured and the product is demolded using conventional procedures. The product is characterized by..having a first region made from the above-described, relatively hard first material (see S region 1~ of Fig. 3) joined, or bonded, to.a secozid region made from the above-described soft, persistently resilient second material (see region 16 of Fig.
3).
To achieve an even greater bond between the two regions, a suitable. bonding agent may be applied to the surface that was exposed by the removing step prior to placing the unimaterial appliance back in the mold for 10 injection of the liquid FMMA.
Turning now to Figs. 3-S, it will be appreciated that zones 28 (Fig.
3)/12 (Fig. 5) allow an adjacent enelosed tooth, such as tooth 22 (Fig. 3)/128 (Fig. S); to move toward first surface 18_a (Fig. 3)/118a (Fig. 5) of first region 14 (Fig. 3)/114 (Fig:: 5). Such mbvement results in penetration of corresponding 1S teeth such as tooth 22/122 into the relatively hard first material of first region 14/114 for a relatively precisa distance. Such penetration defines lateral borders in the 'first material, suG~ as those shown at 30;-around such teeth. The result of both such types of tooth movement toward expanse 18 and such lateral-border forrnagion is that appliance' 10/110 accommodates relatively fixed vertical and lateral positioning of the mandible by 'enclosing teeth such as tooth 22/122.
1'ut another way, and referring to Fig: 3 Only; zones 28 allow advancement of cusps 22b into first surface 18a, thereby to form a pocket 32 in the first surface those shape conforms generally to the cysp and has dimensions panning top 22_c' of the cusp and at least part way down sides 2~?~ of the cusp.
With such Cusp advancement and pocket formation defining lateral b~rders 30 in the first material of first region 14 around such teeth, the appliance , accommodates relatively fixed lateral arid vertical positioning of such enclosed teeth upon desired biting action by the patient.
Referring bask to ~'ig. 3, another advantage of appliance 10 of the f:
preseztt invention is shown by the fast that soft, persistently resilient region 16 provides for improved retention of jacketed teeth such as tooth 22 by extending , apically to what are known as the undercuts of the tooth: ~onventi~nal hard ..._ . .
', vt ~~.3~~~(~
~rVO 93/1731 PCT/US93/021~9 splints cannot extend apically to the undercuts, and conventional "soft"
splints are only able to extend to the undercuts before they eventually harden, at which point such extension is impossible. ..
Referring to Figs. 3-4, it should also be understood that the exact ::.
number of zones 28 formed in a given area of region 16 may vary. To achieve the desired precise vertical and lateral positioning of the mandible described above, appliance 10 must be formed with at least three such zones, two being located substantially distally from the sagittaI plane and one ~ being located substantially mesially from the sagittal plane. For example, referring back to Fig.
20 1; such a requirement would necessitate forming two zones in region 16 adjacent 'teeth 3~; 36 that are distal o the sagittal plane (represented by dashed line 38) and one zone adjacent tooth 40 that is meSial to the sagitzal plane.
Referring to Figs. 2A-2~, it should be apparent that the appliance of the present invention may be constructed with expanse 18 having substantially planar second surface 18b_ (Fig. 2A,) or with ~eXpanse 118 having second surface ll8b_ that conforms generally;to the GUSps of a desired set of teeth such as the lower teeth. The latter embodiment results: in a splint that is usable as a so-called anatornicai splint, or repositioning splint, which is used t~ do what is known as "recapture the disk" associated ~erith the TMJ. The former embodiment is fir splints that are to be used as relaxation or stabilization splints.
.Accordingly, while a preferred embodiment of the invention: has been described herein, it is appreciated that modifications are possible that are withiin the scope of the invention.

Claims (29)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A soft, persistently resilient interocclusal dental appliance, comprising:
a body made from an injectable, curable composition, with the composition including a polymer component consisting essentially of butyl methacrylate polymer, a monomer component consisting essentially of butyl methacrylate monomer, an effective amount of polymerizing agent and with the composition being sufficiently liquid to allow it to be injectable.
2. The appliance of claim 1 wherein the polymer component is about 20-80% by volume of it.
3. The appliance of claim 1 or 2 being formed into a temporo-mandibular joint dysfunction appliance.
4. The appliance of claim 1 or 2 being formed into an anti-snoring device.
5. A soft, persistently resilient interocclusal dental appliance, comprising:
a body made from an injectable, curable composition, with the composition including a polymer component made substantially of butyl methacrylate polymer, a monomer component made substantially of butyl methacrylate monomer, and an effective amount of polymerizing agent.
6. The appliance of claim 5 wherein the polymer component is about 20-80% by volume of it.
7. The appliance of claim 5 or 6 being formed into a temporo-mandibular joint dysfunction appliance.
8. The appliance of claim 5 or 6 being formed into an anti-snoring device.
9. A soft, persistently resilient interocclusal dental appliance, comprising:
a body made from a curable composition, with the composition including a polymer component made substantially of butyl methacrylate polymer, a monomer component made substantially of butyl methacrylate monomer, an effective amount of polymerizing agent, and with the composition being sufficiently liquid to allow it to be injectable.
10. The appliance of claim 9 herein the polymer component is about 20-80% by volume of it.
11. The appliance of claim 9 or 10 being formed into a temporo-mandibular joint dysfunction appliance.
12. The appliance of claim 9 or 10 being formed into an anti-snoring device.
13. A soft, persistently resilient, plural-material, interocclusal dental appliance, comprising:
a body including a hard region and a soft region, and with the soft region being made from a curable composition that includes a polymer component made substantially of butyl methacrylate polymer, a monomer component made substantially of butyl methacrylate monomer, an effective amount of polymerizing agent, and with the soft region formed from the composition being bondable to the hard region.
14. The appliance of claim 13 wherein the polymer component is about 20-80% by volume of it.
15. The appliance of claim 13 or 14 being formed into a temporo-mandibular joint dysfunction appliance.
16. The appliance of claim 13 or 14 being formed into an anti-snoring device.
17. An injectable, curable composition for making a soft, persistently resilient interocclusal dental appliance, comprising:
a polymer component consisting essentially of butyl methacrylate polymer;
a monomer component consisting essentially of butyl methacrylate monomer;
an effective amount of polymerizing agent; and with the composition being sufficiently liquid to allow it to be injectable.
18. The composition of claim 17 wherein the polymer component is about 20-80%
by volume of it.
19. Use of the composition of claim 17 or 18 to form a temporo-mandibular joint dysfunction appliance.
20. Use of the composition of claim 17 or 18 to form an anti-snoring device.
21. An injectable, curable composition for making a soft, persistently resilient interocclusal dental appliance, comprising:
a polymer component made substantially of butyl methacrylate polymer;
a monomer component made substantially of butyl methacrylate monomer;
an effective amount of polymerizing agent; and with the composition being sufficiently liquid to allow it to be injectable.
22. The composition of claim 21 wherein the polymer component is about 20-80%
by volume of it.
23. Use of the composition of claim 21 or 22 to form a temporo-mandibular joint dysfunction appliance.
24. Use of the composition of claim 21 or 22 to form an anti-snoring device.
25. An injectable, curable composition for making a soft, persistently resilient region of a plural-material, interocclusal dental appliance, which appliance also includes a hard region, comprising:
a polymer component made substantially of butyl methacrylate polymer;
a monomer component made substantially of butyl methacrylate monomer;
an effective amount of polymerizing agent; and with the composition being bondable to the hard region.
26. The composition of claim 25 wherein the polymer component is about 20-80%
by volume of it.
27. Use of the composition of claim 25 or 26 to form a temporo-mandibular joint dysfunction appliance.
28. Use of the composition of claim 25 or 26 to form an anti-snoring device.
29. A temporo-mandibular joint dysfunction appliance comprising:
a generally U-shaped body including a relatively hard occlusal layer having opposing first and second occlusal surfaces, with the first surface being bonded to a relatively soft jacketing section for jacketing one such set of teeth, and the second surface being contactable by the other such set of teeth;
the jacketing section being formed from a curable composition for making a soft, persistently resilient appliance, the composition having a polymer component including butyl methacrylate polymer, and a monomer component including butyl methacrylate monomer; and the jacketing section being formed with plural openings for allowing adjacent jacketed teeth to contact the first surface and, upon desired biting by the patient, to penetrate into the occlusal layer for a relatively precise distance, and with such penetration defining lateral borders in the occlusal layer around such teeth so that the appliance accommodates relatively fixed lateral and vertical positioning of such enclosed teeth upon desired biting action by the patient.
CA002131830A 1992-03-11 1993-03-10 Soft resilient interocclusal dental appliance, method of forming same and composite for same Expired - Lifetime CA2131830C (en)

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US07/849,467 1992-03-11
US07/849,467 US5328362A (en) 1992-03-11 1992-03-11 Soft resilient interocclusal dental appliance, method of forming same and composition for same
PCT/US1993/002159 WO1993017631A1 (en) 1992-03-11 1993-03-10 Soft resilient interocclusal dental appliance

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CA2131830C true CA2131830C (en) 2005-09-06

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EP (2) EP0941732B1 (en)
AT (2) ATE241950T1 (en)
AU (1) AU698260B2 (en)
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US5646216A (en) 1997-07-08
US5328362A (en) 1994-07-12
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DE69333032T2 (en) 2004-05-06

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