Mandibular advancement splint
Inactive Publication Date: 2007-04-05
MAGNIN GEORGES
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- Abstract
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Benefits of technology
[0020] Another aim of the present invention is to propose a mouth device against snoring that can adapt to a very large number of individual conformations without irreversible risks for the user's dentition.
[0022] Yet another aim of the present invention is to propose a mandibular advancement splint that can adapt to the wearer's dental conformation having the comfort and efficiency equal to those of a personalized splint and a reduced production cost.
Problems solved by technology
The mandible, normally held by the action of the muscles, in fact tends to move backwards during sleep, its movement causing the tongue to move towards the back of the mouth and thus the size of the upper air tract to diminish.
Sometimes, especially with individuals suffering from macroglossia or from a small-size mouth cavity, or if the laxity of the tissues is high, the obstruction of the breathing canal can be serious or even complete, causing in fact the breathing to be interrupted or obstructive sleep apnea.
This solution however places an excessive constraint upon the wearer and requires individual calibrations for each patient, as well as polysomnographic efficiency controls.
For these reasons, the application of this type of treatment is restricted to obstructive syndromes and is not justified for treating simple snoring.
Prolonged use is likely for the treatment to cause nasal symptoms of the rhinitis type or skin sores that make it impossible to wear the mask.
This solution is however invasive and painful, and the resulting improvement is only transitory.
Furthermore, it can involve changes of the mouth morphology that can disturb deglutition.
This highly invasive operation is nowadays practically abandoned.
Having the mandible immobilized can prove discomforting for the wearer, notably in that it interferes with deglutition and can cause an algo-dysfunctional syndrome (ADS) of the temporo-mandibular joint (TMJ).
The adaptability of known thermoformable devices is very limited and they cannot adapt to the full range of possible conformations.
When the mouth appliance cannot adapt perfectly to the individual dental conformation, the efficiency is reduced, the device is instable, there are excessive tensions on the dentition and the adaptation of the system is very uncomfortable.
Furthermore, following the involuntary movements of clamping the mandible, high and concentrated mechanical efforts can occur on the trays' semi-rigid elements that can cause the device to rupture.
Another limitation of this type of appliances is that if it does not adapt perfectly to the dental conformation, it can, during use, exert lateral forces on the teeth that can be of high intensity.
These lateral forces can, in time, lead to a displacement and destabilization of the teeth and to their definitive loss.
Another limitation of the known mandibular devices, such as for example the devices described by EP0845962B, that allow a certain freedom of movement of the mandible, is that the latter can, following involuntary movements during sleep, abandon the forward advanced position.
The device then completely loses its efficiency.
The wearer's position during sleep can also influence negatively the good functioning of the known mandibular devices.
Once these phases of agitated sleep over, the prior art devices are not always capable of automatically bringing the mandible in the advanced therapeutic position.
Another limitation of the known devices capable of being personalized is that they are based on a conventional mouth geometry where the teeth are parallel and arranged on two plane arches.
These splints are not capable of adapting to most real dental conformations.
Method used
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OF EMBODIMENTS OF THE INVENTION
[0039]FIG. 1 represents an intra-buccal device against snoring of known type. It is composed of two trays 1, 2 designed to wrap the upper resp. lower dental arch. With reference to FIG. 2, the trays 1 and 2 have an extrados essentially rigid3 on which a thermoformable intrados 4 is molded. The trays are connected to one another by the hooks 5 and 7 and the elastic loops 6, in order to exert on the mandible an advancement force whilst allowing a certain freedom of movement. The rigid extrados of this device is incapable of following an irregular dentition.
[0040] During use, the plane surfaces 8 of the two extrados find themselves in contact along the occlusion plane. The mandible's laterality and forward and backward movements thus include a sliding of these surfaces 8 one against the other.
[0041] In order to allow a personalized adaptation of this apparatus, each patient can adapt the trays to his own conformation by molding the thermoformable intrad...
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Mandibular advancement splint against snoring and sleep apnea. The splint is made of two thermoformable trays (1, 2) designed to envelop the upper and lower arch. In order to be able to adapt to individual variations in conformation, the advancement splint includes an articulated frame having rigid and flexible elements, immersed in the thermoformable flexible material or molded around it. The frame's articulations (12, 13, 23) allow the splint to fit the curve of the dental arch and to adapt to irregularities in the teeth's position. The inventive splint is equivalent in terms of comfort and efficiency to a personalized splint made by an orthodontist or dental technician, but its cost is 6 to 10 times lower.
Description
REFERENCE DATA [0001] This application is a continuation of international patent application PCT / EP2005 / 052431, filed on May 27, 2005, claiming priority form European patent application EP04102543, filed on Jun. 4, 2004, both incorporated herewith by reference.TECHNICAL FIELD [0002] The present invention relates to the field of mouth corrective appliances and notably to a mandibular advancement splint for treating snoring and night apnea. RELATED ART [0003] Snoring is a well-known acoustic expression whose anatomic and physiological causes are connected to a muscular hypotonia that appears during sleep. The mandible, normally held by the action of the muscles, in fact tends to move backwards during sleep, its movement causing the tongue to move towards the back of the mouth and thus the size of the upper air tract to diminish. The resulting turbulences of the respiratory flow, amplified by vibration and resonance phenomena of the soft palate (velum palatinum) and of the adjacent sof...
Claims
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CPCA61F5/566
InventorMAGNIN, GEORGES
OwnerMAGNIN GEORGES