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.

Patents

  1. Advanced Patent Search
Publication numberUS3864832 A
Publication typeGrant
Publication dateFeb 11, 1975
Filing dateApr 3, 1973
Priority dateApr 5, 1972
Also published asDE2316589A1
Publication numberUS 3864832 A, US 3864832A, US-A-3864832, US3864832 A, US3864832A
InventorsCarlson Gunnar Olof
Original AssigneeCarlson Gunnar Olof
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Throw-away teeth protector
US 3864832 A
Abstract
A throw-away teeth protector comprising an arcuate base member having channel-shaped cross-section and a string of plastic material in the arcuate channel, said string having a free surface adapted to be forced against the points of the teeth to be protected, when the protector is to be used, so that the teeth are embedded at least partially in the plastic material.
Images(2)
Previous page
Next page
Description  (OCR text may contain errors)

United States Patent Carlson Feb. 11, 1975 [54] THROW-AWAY TEETH PROTECTOR 35,247,844 4;!366 Berlghzlish 128/!36 ,457,9l6 7 l 69 Woic i [761 9 Eddage" 3,496.936 2/1970 Gores 128/136 182 63 D ursholm, Sweden [22] Filed: Apr. 3, 1973 Primary Examiner-Robert Peshock Attorney, Agent, or FirmCushman, Darby & [21] Appl. No.. 347,365 Cushman [30] Foreign Application Priority Data [57] ABSTRACT Apr. 5, 1972 Sweden 4367/72 A throw-away teeth protector comprislng an arcuate [52] U S Cl 32/40 R 128/136 base member having channel-shaped cross-section and [51] 11/00 a string of plastic material in the arcuate channel, said g string having a free Surface adapted to be forced [58] Field of 32/14 1 128/136 against the points of the teeth to be protected, when [56] References Cited the protector is to be used, so that the teeth are em- UNITED STATES PATENTS 2/1966 Jacobs l23/l36 bedded at least partially in the plastic material.

6 Claims, 5 Drawing Figures PATENTED FEB] 1 I975 3.864.832 a SHEET 1 BF 2 Fig. 2

Fig.3

THROW-AWAY TEETH PROTECTOR The present invention relates to a throw-away teeth protector adapted to be applied in case of a temporary risk of teeth injuries.

It has been known for a long time that there is a risk of injuries of teeth and teeth protheses during such medical incisions or treatments which require work in the oral cavity or the insertion of instruments of various kinds through the oral cavity of an anaesthetized patient. During such operations, the throat of the patient is usually completely open and, on some occasions, it has occurred that loosened teeth or pieces of teeth have fallen down into the throat and have passed down into the digestive tract or via the windpipe into the lungs. Particularly in the last-mentioned case, the situation is serious and possibly directly dangerous to life. Apart from the risk during the time the work operations are performed and instruments are inserted or removed, there are also risks of injury when an anaesthetized patient falls asleep or wakes up since at these moments spasmodic biting movements will often occur.

While several types of teeth protectors are previously known, e.g. through US. Pat. Nos. 2,705,492, 3,016,052 and 3,124,129, they all require pretreatments before use, e.g. heating to make the protecting material soft enough for application on the teeth or a combination of elements to obtain a filler material which can start curing in a base member.

The main object of the present invention is to provide a throw-away teeth protector which can easily be applied without further preparation steps when there is a risk of injuries of the teeth.

According to the invention this object is attained by a teeth protector comprising an arcuate base member of an elastic material which is of substantially channel shape in cross-section, the ends of the channel being open, and characterized by a string of plastic material in the arcuate channel, the string having a free surface which is adapted to be forced against the points of the teeth to be protected when the protector is to be used, so that the teeth are embedded at least partially in the plastic material.

The use of a string of plastic material in the channelshaped base member makes the teeth protector ready for use without any pre-treatments. Furthermore, by leaving the ends of the channel open, the teeth protector can be made to fit all or at least several sizes and shapes of the jaws. This will facilitate the use of the teeth protector and decrease manufacturing and distribution costs.

Another object is to provide means for retaining the plastic string in the base member channel.

Still another object of the invention is to design the teeth protector so that the plastic material is prevented from being pressed out from the base member when the teeth are forced into the plastic material. This is attained by making the plastic string slightly shorter than the base member channel, so that the ends of the plastic string are located at a distance from the ends of the base member, and by making the inner wall of the base member higher than the outer wall.

By using a string material which is plastic and elastic at room temperature the teeth protector will be still more effective, as the elastic property of the material will give a better protection in case of a powerful strike on the teeth protector.

Two embodiments of the invention will be described below more closely with reference to the attached drawings. The same reference numerals have been used for corresponding portions in the two embodiments.

FIG. 1 illustrates in perspective an embodiment of a teeth protector according to the invention.

FIG. 2 shows a top view of the same teeth protector.

FIG. 3 illustrates a cross-section through the embodiment according to FIG. 2.

FIG. 4 illustrates a second embodiment of the invention.

FIG. 5 is a cross section view through the embodiment according to FIG. 4.

The teeth protector shown in FIG. 1 comprises an arcuate base member 10 which is formed with smoothly rounded edges so as to avoid discomfort to the person to which the teeth protector is applied and which is manufactured of a flexible, elastic material, e.g. plastic. The base member 10 has an outer arcuate side wall 11 and an inner arcuate side wall 12, which form a channel 13 for receiving a string 14 of plastic material. As shown in FIG. 1, the side walls have a reduced height at the ends of the base member. By this form the teeth protector is well adapted to the human teeth jaw. The base member channel 13 has open ends. The absence of end surfaces at the ends of the base member facilitates to a large extent the forming of the teeth protector in one standard size, which fits all or almost all teeth jaws, upper jaws as well as lower jaws. The ends of the string 14 is conveniently located at a small distance inside the ends of the base member 10.

FIG. 2 shows a top view of the teeth protector according to FIG. 1 and FIG. 3 shows a cross-section along the line III-III in FIG. 2. From FIG. 3 it can be seen that the outer side wall 11 of the teeth protector is higher than the inner wall 12, which is anatomically correct and causes an improved fixation. The base member 10 has a substantially U-shaped cross-section and is slightly narrower at the central portion than at the end portions. This design will facilitate the production of a teeth protector of one standard size which fits all or most jaws and at the same time avoids unnecessary lumberingness or ungainliness of the teeth protector. At the central portion of the teeth protector the dimensional discrepancies between the jaws of different persons are at a minimum. At the ends of the jaws the individual variations are considerably larger. The internal side surfaces of the base member are also provided with protrusions 15 extending into the channel 13, said protrusions serving to retain the string 14 of plastic material in the base member channel. The side wall protrusions l5 consist of long ridges running along the channel and passing the ends of the plastic string. The outer side wall 11 and the inner side wall 12 are substantially perpendicular to the plane of the arcuate base member 10.

The embodiment of the teeth protector shown in FIGS. 4 and 5 differs from the embodiment according to FIGS. 1 3 by the facts that in the embodiment according to FIGS. 4 and 5 the inner wall 12 is higher than the outer wall 11 and that the base member is provided with protrusions 16 on the outside of the bottom of channel 13. The inner wall 11 is about 2 mm higher than the outer wall and the height of the protrusions 16 is about 5 mm.

The height of the inner wall 12 will prevent plastic string material from being pressed out of the base member into the mouth, because the inner wall 12 will abut the jaw and form a shield when the teeth protector has been applied. Due to the free space at the ends of the base member no plastic material is forced out at the ends of the base member, neither.

As the inner wall 12 is higher than the outer wall 11, the side wall protrusion 15 on the'inner wall 12 is positioned slightly higher than the one of the outer wall 11.

The bottom protrusions 16 consist of ridges having rounded sides and spaced apart. The protrusions are positioned unsymmetrically with respect to the symmetry axis of the base member in the plane of the base member. This feature will make it possible to use identical teeth protectors for both jaws without the protrusions on the two teeth protectors facing each other. If the protrusions are just opposite to each other, the protrusions may slide on each other, due to the rounded or sloping sides, so that the jaws may be displaced sidewards with respect to each other in case of powerful chewing or biting which may be injurious to the person using the teeth protectors.

The bottom protrusions 16 will provide a free space between the base member and, the teeth of the opposite jaw or between two base members. This free space will prevent the risk of cutting offwires or pipes which have to pass into the mouth during medical incisions or treatments. It is comparatively easy to avoid that such wires or pipes get clamped between a protrusion and an opposite base member or tooth.

The base member 10 is also provided with a small aperture 17, in which a cord, attached at a point outside the mouth of a patient, can be fastened to prevent that the teeth protector falls down into the pharynx during the application or removal procedure.

The string material should be plastic and elastic at room temperature and can e.g. consist of a nonthermosetting plastic, e.g. silicon rubber polymer with silicon oil as a binding agent. Such a material has the advantage that the teeth protector will be ready for use without any further preparation step and that the elasticity of the material will further decrease the risk of injuries on the teeth, as already mentioned. It is also necessary that the material will come loose of the teeth when the teeth protector is to be removed. The mentioned material has also this property.

Only two embodiments of the teeth protector have been shown on the drawings. However, it will be understood that many different shapes are possible. It is important that the base member is formed so that the teeth protector cannot cause any injuries during the application or the use and that it stabilizes and protects the string of plastic mass satisfactorily. The design of the outer side wall at the ends of the base member can be varied in many ways and the inner side wall may possibly be inclined so that the channel will become wider at the free surface. The height of the outer side wall can also be reduced at the central portion of the base member. The side wall protrusions illustrated in FIG. 3 may possibly be excluded or replaced by grooved surfaces or the like. The protrusions on the bottom of the channel can also have many different shapes, e.g. spherical.

The teeth protector is particularly intended for use, when work is to be performed in the throat of a patient and various instruments have to be inserted through the oral cavity. Even on other occasions the teeth protector can, however, effectively prevent injuries. Patients, which are being treated in intensive treatment departmerits after serious heart infarcts or extensive burns, have often a tendency to press their jaws together and grind their teeth. The teeth protector, if applied in such a case, will have a protective and pressure-equalizing effect, which eliminates the risk of injuries. Also in sport or training of various kinds a temporary application of a teeth protector according to the invention can be justified in order to eliminate the risk of teeth injuries. The crews in armoured cars and tanks, e.g., during special transport conditions, experience considerable discomfort from their teeth due to vibrations and engine noise, which is compensated by strongly biting the jaws together. Also in this case the teeth protector can be used as a safety means. Since one and the same size can be used by all persons and the teeth protector due to its simple structure and low production cost can be formed as a throw-away protective device, the use can also easily be made satisfactory from a hygienical point of view.

During the application, the free surface of the plastic string is pressed against the points of the teeth, so that the teeth are embedded in the plastic mass. If in spite of the protector any filling or part of a tooth should come loose,-said part will remain in the plastic mass and be removed from the oral cavity together with the teeth protector, whereby all risks of complications occurring herefrom are eliminated.

What I claim is:

l. A throw-away teeth protector for use during medical incisions and treatments, comprising:

an arcuate base member formed of an elastic material, said base member having a substantially channel-shaped cross section with the inside wall thereof being higher than the outside wall and wherein the bottom of the channel on the outside is provided with protrusions which are spaced apart to form a free space between the base member of a protector applied on one jaw and the teeth of the opposite jaw, the bottom protrusions being positioned unsymmetrically with respect to the symmetry axis in the plane of the base member so that the bottom protrusions are displaced with regard to each other when two identical teeth protectors are used simultaneously in both jaws, the ends of the channel being open and a string of plastic material being positioned in the arcuate channel inside the ends of said base member, saidstring being plastic and elastic and non-curing at room temperature and said string having a free surface which is adapted to be forced against the points of the teeth to be protected, when the protector is to be used, so that the teeth are embedded at least partially in the plastic material, the plastic material being maintained plastic and non curing in use.

2. Teeth protector according to claim 1, in which the side walls of the base member facing the channel are provided with protrusions for retaining the plastic string in the base member channel.

3. Teeth protector according to claim 2, in which the side wall protrusions consist of long ridges running along the channel. v

4. Teeth protector according to claim 3, in which the ridges, before the use of the protector, pass the ends of the plastic string.

5. Teeth protector according to claim 1, in which the bottom protrusions consist of rounded walls running across the bottom channel substantially at right angle to the channel.

6. Teeth protector according to claim 1, wherein said material consists of silicon rubber polymer with silicon oil as a binding agent.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3236235 *Nov 8, 1963Feb 22, 1966Madison Dental CoProtective mouthpiece
US3247844 *Jan 29, 1964Apr 26, 1966Roberts Dental Mfg Co IncMouth guard
US3457916 *Dec 30, 1966Jul 29, 1969Personalized Equipment IncProtective mouthpiece
US3496936 *Oct 31, 1967Feb 24, 1970Gores Kenneth WMouthguard
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4227877 *Oct 20, 1977Oct 14, 1980Black Knight Investments, LimitedAnatomical intra-orally moldable dental impression tray and method
US4337765 *Nov 26, 1980Jul 6, 1982Zimmerman Edgar SMouthguard
US4344755 *Sep 15, 1980Aug 17, 1982Gold Henry ODental handpiece guide
US4569342 *Oct 13, 1983Feb 11, 1986Nostitz F VonDental impression tray and process for the use thereof
US4583527 *Dec 24, 1984Apr 22, 1986Musicant Belmont SDisposable cushioning device for a laryngoscope
US4676240 *Sep 9, 1985Jun 30, 1987Gardy Victor RTongue locking device to minimize effects of sleep apnea and to reduce snoring
US4944313 *Sep 6, 1989Jul 31, 1990E-Z-Em, Inc.Single-use annular mouthpiece
US4955393 *Mar 30, 1988Sep 11, 1990Trident Laboratories, Inc.Mouthguard with conformable arch liners
US5031638 *Mar 13, 1990Jul 16, 1991Roll-A-Puck LimitedDirect-formed mouthguard, a blank for use in making the mouthguard and a method of making the mouthguard
US5033480 *Mar 23, 1990Jul 23, 1991Wiley Christopher WShort self adhesive denture guard
US5152301 *Sep 16, 1991Oct 6, 1992E-Z Gard Industries, Inc.Mouthguard
US5154184 *Sep 16, 1991Oct 13, 1992Alvarez Ramiro MAdjustable anti-snoring apparatus
US5320114 *May 24, 1993Jun 14, 1994E-Z Gard Industries, Inc.Boiling and stabilization tray for mouthguards
US5339832 *May 24, 1993Aug 23, 1994E-Z Gard Industries, Inc.Thermoplastic mouthguard with integral shock absorbing framework
US5365946 *Aug 21, 1992Nov 22, 1994E-Z Gard Industries, Inc.Quick release tether for mouthguards
US5373859 *Apr 19, 1993Dec 20, 1994Forney; Leroy S.Tongue positioning device
US5427117 *Sep 29, 1993Jun 27, 1995Thornton; W. KeithDental device
US5511562 *Nov 14, 1994Apr 30, 1996Hancock; Raymond R.Temporomandibular joint appliance
US5537994 *Jun 3, 1994Jul 23, 1996Thornton; W. KeithCombination face mask and dental device for improved breathing during sleep
US5566683 *Mar 24, 1995Oct 22, 1996Thornton; W. KeithDental device
US5566684 *Nov 21, 1995Oct 22, 1996Dental Concepts Inc.Custom fit mouthguard
US5678567 *Sep 18, 1995Oct 21, 1997Thornton; W. KeithApparatus for adjusting a dental device
US5718575 *Dec 16, 1996Feb 17, 1998Big Picture, Inc.Adjustable, customizable performance enhancing dental appliance
US5755219 *May 14, 1996May 26, 1998Thornton; W. KeithDevice for improving breathing
US5829441 *Jun 24, 1997Nov 3, 1998Nellcor Puritan BennettCustomizable dental device for snoring and sleep apnea treatment
US5836761 *Aug 5, 1996Nov 17, 1998Big Picture, Inc.Adjustable customized dental appliance
US5865619 *Feb 11, 1998Feb 2, 1999Big Picture, Inc.Triple composite performance enhancing dental appliance
US5879155 *Dec 16, 1996Mar 9, 1999Big Picture, Inc.A customized dental appliance for athelete mouth protects the teeth, jaws, gums, connective tissues, back, head and muscles from teeth clenching force typically exerted during athletic acitivity
US5899691 *Dec 14, 1995May 4, 1999Sentage CorporationJaw exerciser/strengthener
US5954048 *Apr 16, 1997Sep 21, 1999Thornton; W. KeithDevice and method for improving breathing
US5983892 *Jun 19, 1997Nov 16, 1999Thornton; W. KeithDevice for improving breathing
US6012919 *Feb 1, 1999Jan 11, 2000Cross, Iii; Henry D.Triple composite performance enhancing dental appliance
US6071121 *Dec 23, 1998Jun 6, 2000Simon; Jerome MichaelIntraoral semi-custom bite forming and discluder device
US6155262 *Jan 21, 1997Dec 5, 2000Thornton; W. KeithMethod and apparatus for adjusting a dental device
US6200133Mar 8, 1999Mar 13, 2001Big Picture, Inc.Adjustable customizable dental appliance with triple composite structure
US6209542Jan 31, 1996Apr 3, 2001W. Keith ThorntonCombination face mask and dental device for improved breathing during sleep
US6237601Sep 8, 2000May 29, 2001Big Picture, Inc.Cross-cantilever connectors for a dental appliance
US6247926Jan 17, 2000Jun 19, 2001W. Keith ThorntonOral appliance having a bonding layer and methods for fitting and relining same
US6257239Sep 8, 2000Jul 10, 2001Bite Tech, Inc.Dental appliance with anti-microbial additive
US6305376Sep 9, 1999Oct 23, 2001W. Keith ThorntonDevice and method for improving breathing
US6371758Dec 12, 1996Apr 16, 2002Bite Tech, Inc.One-piece customizable dental appliance
US6374824Apr 12, 1999Apr 23, 2002W. Keith ThorntonDevice for improving breathing
US6405729Apr 5, 2000Jun 18, 2002W. Keith ThorntonOral appliance for improving breathing and method of constructing same
US6415794Sep 8, 2000Jul 9, 2002Bite Tech, Inc.Composite dental appliance with wedge
US6464924Apr 5, 2000Oct 15, 2002W. Keith ThorntonHomopolymer of caprolactone initiated with a diol
US6491036Apr 6, 2001Dec 10, 2002William A. CookLow-density polyethylene dental appliance and mouthguard with nucleating agent
US6505626Apr 6, 2001Jan 14, 2003Jon D. KittelsenComposite mouthguard with nonsoftenable framework and disconnected anterior impact braces
US6505627Apr 6, 2001Jan 14, 2003Jon D. KittelsenComposite mouthguard with palate arch and anterior palate opening
US6505628Apr 6, 2001Jan 14, 2003Jon D. KittelsenQuadruple composite performance enhancing mouthguard
US6508251Apr 6, 2001Jan 21, 2003Jon D. KittelsenComposite mouthguard with palate arch with nonsoftening framework having at least one bridge
US6510853Apr 6, 2001Jan 28, 2003Jon D. KittelsenEncapsulated quintuple composite mouthguard
US6516805Mar 31, 1997Feb 11, 2003W. Keith ThorntonApparatus for prevention of snoring and improved breathing during sleep
US6539943Sep 8, 2000Apr 1, 2003Bite Tech, Inc.Encapsulated composite dental appliance
US6553996Apr 6, 2001Apr 29, 2003Jon D. KittelsenDental appliance with antimicrobial additive
US6571798Apr 5, 2000Jun 3, 2003W. Keith ThorntonDevice for improving breathing and method of constructing same
US6581604Apr 6, 2001Jun 24, 2003Bite Tech, Inc.Low-density polyethylene dental appliance and mouthguard
US6588430Apr 6, 2001Jul 8, 2003Bite Tech, Inc.Composite performance enhancing mouthguard with embedded wedge
US6598605Sep 8, 2000Jul 29, 2003Bite Tech, Inc.Non-softenable, impressionable framework for dental appliances
US6626180Sep 8, 2000Sep 30, 2003Bite Tech, Inc.Quadruple composite performance enhancing dental appliance
US6675802May 8, 2001Jan 13, 2004W. Keith ThorntonDevice for improving breathing incorporating a detachable venting seal
US6675806Apr 6, 2001Jan 13, 2004Bite Tech, Inc.Composite mouthguard with elastomeric traction pads and disconnected anterior impact braces
US6691710Apr 6, 2001Feb 17, 2004Bite Tech, Inc.Composite mouthguard
US6820623Nov 14, 2002Nov 23, 2004Bite Tech, Inc.Polyethylene dental appliance and mouthguard with tactifier resin
US6857428Oct 24, 2002Feb 22, 2005W. Keith ThorntonApplying a deformable mask sheet against a portion of the user's face surrounding nostrils and fitting to facial bone structure and features; allowing to become nondeformable; sleep disordered breathing; snoring; obstructive sleep apnea
US7174895May 1, 2003Feb 13, 2007W. Keith ThorntonDevice and method for improving a user's breathing
US7243650Jul 12, 2004Jul 17, 2007Thornton W KeithCustom fitted mask configured for coupling to an external gas supply system and method of forming same
US7597103Feb 13, 2007Oct 6, 2009W. Keith ThorntonDevice and method for improving a user's breathing
US7677889Jul 30, 2007Mar 16, 2010Thornton W KeithDevice and method for forming a custom oral appliance
US7721741May 22, 2009May 25, 2010Thornton W KeithOral appliance for treating a breathing condition
US7748386Apr 6, 2006Jul 6, 2010Thornton W KeithOral appliance for treating a breathing condition
US7963284Aug 18, 2004Jun 21, 2011Airway Technologies, LlcCustom fitted mask and method of forming same
US8020276Nov 29, 2007Sep 20, 2011Airway Technologies, LlcSystem and method for custom-orienting a medical mask to an oral appliance
US8074658Jun 12, 2003Dec 13, 2011Bite Tech, Inc.Composite performance enhancing tethered mouthguard
US8104324Jul 7, 2010Jan 31, 2012Bio-Applications, LLCIntra-extra oral shock-sensing and indicating systems and other shock-sensing and indicating systems
US8236216Jun 26, 2007Aug 7, 2012Airway Technologies, LlcSystem and method for forming a custom medical mask using an orientation device
US8316857Jun 7, 2010Nov 27, 2012Airway Technologies, LlcOral appliance for treating a breathing condition
US8316858Jun 7, 2010Nov 27, 2012Airway Technologies, LlcSystem for coupling an oral appliance to a medical mask
US8322344 *Jan 5, 2010Dec 4, 2012Ranir, LlcOral orthosis
US8356603Jul 2, 2010Jan 22, 2013Airway Technologies, LlcOral appliance for treating a breathing condition
US8453650Jul 3, 2012Jun 4, 2013MdmMouthpiece
US8459267Jun 8, 2011Jun 11, 2013Edgar S. ZimmermanMouthguard and method of manufacture therefor
US8468870Jan 11, 2012Jun 25, 2013Bio-Applications, L.L.C.Intra-extra oral shock-sensing and indicating systems and other shock-sensing and indicating systems
US8567408Aug 26, 2009Oct 29, 2013Bite Tech, Inc.Composite oral appliances and methods for manufacture
US8573224Sep 28, 2010Nov 5, 2013Airway Technologies, LlcCustom-molded oral appliance and method of forming
US8607796Feb 25, 2010Dec 17, 2013Airway Technologies, LlcApparatus and method for coupling an oral appliance to a gas delivery device
US8607798Jun 2, 2011Dec 17, 2013Shock Doctor, Inc.Custom mouthguard
US8656923Sep 11, 2012Feb 25, 2014Ranir, LlcOral orthosis
US8662084Apr 5, 2011Mar 4, 2014Airway Technologies, LlcUniversal oral appliance with a universal coupler
US8671946Apr 5, 2011Mar 18, 2014Airway Technologies, LlcCustom dental appliance and method of creating a custom dental appliance
US8689796May 17, 2011Apr 8, 2014Shock Doctor, Inc.Mouthguard with linear storage configuration
US8739600Jan 11, 2012Jun 3, 2014Bio-Applications, LLCIntra-extra oral shock-sensing and indicating systems and other shock-sensing and indicating systems
US20110162658 *Jan 5, 2010Jul 7, 2011Ranir, LlcOral orthosis
US20130130193 *Nov 22, 2011May 23, 2013Ranir, LlcOral orthosis handle
WO2010000594A1 *Jun 11, 2009Jan 7, 2010Giovanni Dicran MegighianMyofunctional device, particularly suitable for motor training of facial muscles
Classifications
U.S. Classification128/862
International ClassificationA61C19/06, A61C5/14, A61C13/00, A61C5/00, A61C13/107, A61C19/00
Cooperative ClassificationA61C5/14
European ClassificationA61C5/14