WO1993007831A1

WO1993007831A1 - Retainer shim-pad for dental prosthesis

Info

Publication number: WO1993007831A1
Application number: PCT/IT1991/000097
Authority: WO
Inventors: Arturo Gemmiti
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-10-18
Filing date: 1991-11-15
Publication date: 1993-04-29
Anticipated expiration: 1994-04-18
Also published as: ITRM910206U1; ITRM910206V0; AU9018391A; IT224077Z2

Abstract

The present invention relates to an improved non-sticking retainer shim-pad for dental prosthesis having such a form as to fit the average, both upper and lower, human dental arch and such an extension as to lock the prosthesis and a thickness such as to compensate the shaking effects resulting from the contraction of the dental gums with the time. The pad is manufactured with seaweeds which cannot be dissolved, and in combination with common adhesives can firmly lock the prosthesis to the dental gums.

Description

DESCRIPTION

RETAINER SHIM-PAD FOR DENTAL .PROSTHESIS

The present invention relates generally to the field of 'the dental prosthesis.

More in particular it relates to shim-pads to be interposed between the prosthesis and the dental gums in order to retain the prosthesis by a resilient, soft layer.

Retainer shim-pads for dental prosthesis have been hitherto manufactured in two sticking pieces, one of which for the upper dental arch and the other for the lower dental arch. The upper piece consists of a plaque covering the whole palate; the lower piece consists of a large curved stripe the form of which fits the dental arch, however, said stripe providing a longer extension. Both pieces have a thin thickness lower than half milli¬ meter. Such shim-pads suffer, however, from several problems. The contraction of the gums which takes place with the passing of time invalidates the locking action of such shim-pad causing the prosthesis to loosen so that the patient is forced to replace the prosthesis because of its shaking with a strong economic burden.

The present invention aims mainly at overcoming the above mentioned problem of the previous status of art providing a non-sticking shim-pad performing a retaining action as the gums are being contracted. Such aim is achieved by manufacturing the shim-pad with a thickness larger than the pads of the previous art and with the sole shape of the lower piece for both dental arches according to the previous art, while the size is chosen such that the shim-pad fits as much as possible all mouths.

The advantages of the present invention arise from its use, manufacturing and marketing. In fact it is requested to provide only one production line for one piece instead of two, said piece requiring neither fitting nor cuts with scissors, which could result dangerous for some old people, so that the product will be sold all the more. Therefore, the present invention relates to a non-sticking shim-pad retaining dental prosthesis and having the form of the average, both upper and lower, human dental arch and a thickness such as to compensate the shaking due the contraction of the dental gums with the time.

Such shim-pad is manufactured with seaweeds which cannot be dissolved, and in combination with the common adhesives can firmly lock the posthesis to the dental gums. Particularly advantageous embodiments are set forth in the sub-claims.

Further details and advantages of the present invention will be apparent from the following detailed description of a preferred exemplary, non limitative embodiment thereof with reference to the accompanying drawings, in which:

Figs. 1 and 2 show the sticking pads for dental prosthesis at present on the market;

Fig. 3 shows the retainer shim-pad according to the present invention.

With reference to Fig. 3 the pad of the present invention is manufactured in one double-use piece, i.e. both for the lower dental arch and the upper dental arch, under the form of the lower piece of the previous art but being of the non-sticking type and having smaller size and larger thickness. Specifically the piece can be in¬ scribed in a rectangle of base length "A" equal to 70 mm, and height "B" of 48 mm along the sagittal direction of the mouth, and has a thickness of 1 mm. It has a maximum width "C" of 13 mm corresponding to the molar teeth. It is manufactured with vegetal fibres from the seaweeds, such material having the best biological compatibility, especially in case of inflammation.

The present invention has been described with reference to its preferred embodiment, however, it will be obvious to those skilled in the art that modifications and/or integrations may be made without departing from the scope of the invention defined in the appended claims.

Claims

1. A non-sticking retainer shim-pad for dental prosthesis, characterized in that it has such a form as to fit the average, both upper and lower, human dental arch, however with a longer extension to such an extent as to lock the prosthesis, and with such a thickness as to compensate the shaking effects resulting from the contraction of the dental gums with the time.

2. The non-sticking retainer shim-pad for den¬ tal prosthesis of claim 1, characterized in that it can be inscribed in a rectangle of base length equal to 70 mm and height of 8 mm along the sagittal direction of the mouth, and has a maximum width of 13 nun corresponding to the molar teeth and a thickness of 1 mm.

3. The non-sticking retainer shim-pad for den- tal prosthesis of the preceding claims, characterized in that it is manufactured with vegetal fibres of seaweeds.