Dentistry – Orthodontics – By mouthpiece-type retainer
Patent
1999-05-20
2000-10-17
Lewis, Ralph A.
Dentistry
Orthodontics
By mouthpiece-type retainer
128861, A61C 708
Patent
active
061322083
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The subject of the present invention is medical appliances for functional dento-facial orthopaedic treatment and periodontics, aimed at correcting functional disorders with neurovegetative functions, more particularly functional disorders with: that is to say anomalies in the shape of the buccal osseous bases and malpositions of the teeth.
2. Background of the Related Art
In order to correct the position of the teeth in patients, it is known practice to employ corrective medical appliances known as "orthodontic positioners", which in plan view adopt the shape of the U and comprise at least one upper or lower trough but normally both an upper and a lower trough, each trough containing a number of depressions for receiving and retaining the teeth held therein and returning them to a position that is estimated as being the ideal position. There are various kinds of orthodontic positioner, what they have in common being that they have specific locations for the existing teeth and, in some cases, for the permanent teeth yet to come (see, for example, French Patent No. 2329247): movements of the teeth within these orthodontic positioners are therefore not permitted.
Devices known by the name of "channel activators" for treatment as part of dento-facial therapy are also known, from French Patent No. 2641964.
These channel activators consist, in general, of a double tray (or double trough) of semi-elliptical shape, the channels or troughs being separated by a horizontal partition (or thickness). Unlike in the aforementioned orthodontic positioners, there are no precise receivings for the teeth within the double channel. Indeed, the interior surface of the vertical or inclined walls of the double channel, among which the vestibular strip (external) and the lingual strip (internal), and the surface of the horizontal partition, are smooth.
The basic idea underlying the channel activators described in French Patent No. 2641964 is as follows: buccal deformation and the accompanying malpositions of the teeth are due to functional disorders with the neurovegetative functions that are: nasal breathing, mastication, swallowing and phonation. In most cases treated, the wearing of the tray activators and the exercises that accompany their day-to-day wearing allow the four aforementioned neurovegetative functions to be corrected and as a consequence allow the anomalies in the shape of the buccal osseous bases and malpositions of the teeth to be corrected.
However, the channel activators described in French Patent No. 2641964 are not entirely satisfactory as they actually present the following drawbacks: infraclusion (or gap) appears. In other words, a space in the vertical direction appears between the upper and lower incisors. This infraclusion is due, in particular, to the position of the tongue, this position being associated with atypical swallowing of a childlike type (inserting the tongue) between the incisors at the time of swallowing; fitting in all the teeth is not achieved; shape of the buccal osseous bases could not be corrected, such as: which are too large compared with the size of the jaw bones [(i.e. the upper jaw (maxilla) and the lower jaw (mandible)]; position of the mandible, often associated with underdevelopment of the upper jaw bone.
An essential objective of the invention is therefore to provide a solution to the aforementioned drawbacks of the channel activators described in French Patent No. 2641964. Another important objective of the invention is to provide new corrective appliances for functional dento-facial orthopaedic treatments which are suitable for and effective in treating children who have their deciduous or permanent incisors, as well as adolescents and adults, in whom the risks of a relapse or of the appearance of further malpositions of the teeth in normal use of these appliances are minimized.
SUMMARY OF THE INVENTION
To this end, the subject of the present invention is novel corrective appliances for functional dento-facial ortho
REFERENCES:
patent: 3478429 (1969-11-01), Shilliday
patent: 5876199 (1999-03-01), Bergersen
Lewis Ralph A.
Moore Steven J.
Sodisapf
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