Dentistry – Apparatus – Having suction orifice
Patent
1993-07-06
1995-04-18
O'Connor, Cary E.
Dentistry
Apparatus
Having suction orifice
433136, A61C 1706
Patent
active
054073537
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an extractor for use in dental treatment.
BACKGROUND ART
It is earlier known to use different kinds of extractors in the course of dental treatment, primarily to remove saliva from the patient's mouth together with water supplied to the patient's mouth during treatment, for instance to cool the drill used to drill a patient's tooth. These extractors may have the form of a helical extractor which is attached to the patient's jaw, or the form of a plastic tube which is held in place by a dental nurse during particularly intensive stages of dental treatment. These extractors may also have the additional function of clamping the patient's tongue or of holding the tongue to one side, so as to avoid injury to the tongue.
Society has become more and more aware of the problems that can be caused by amalgam dental fillings. Dental amalgam is broken down by wear and by corrosion and can cause chronic mercury poisoning, resulting in migraine, dizziness, eczema, and bleeding, among other ailments.
On some occasions, patients have suffered serious, acute poisoning problems when replacing old amalgam fillings with plastic fillings for instance, probably as a result of the mercury vapour and amalgam dust that is generated when drilling-out the fillings. It is important to note that the specific surface area from which mercury vapour can be generated is considerably enlarged when the amalgam is finely-divided in the process of treating a tooth in the aforesaid manner.
Many patients have been caused considerable suffering as a result of prolonged vapourization from amalgam fillings and/or when treating old fillings. It will be also noted that dentists and dental nurses will also be subjected to toxic vapours and toxic dust, in addition to the patients.
The object of the present invention is to endeavour to overcome the aforesaid drawbacks.
DISCLOSURE OF THE INVENTION
The inventive extractor includes a hood-like member which defines a given volume and which is intended to be placed over one or more teeth. The hood-like member includes a part which is turned so as to face towards the free ends of the teeth and which is provided with an opening through which dental treatment can be carried out.
A suction device has a suction nozzle which is located within the hood-like member and which functions to extract dust and vapour generated during treatment of the tooth or teeth concerned.
These and other characteristic features of the inventive extractor are set forth in the following claims.
The hood-like member can be made from a readily-formable, optionally resilient material and is constructed advantageously so that the hood-like member will strive to lie against the patient's gum or against the base part of the patient's teeth. In addition to achieving this desired abutment of the hood-like member by appropriate configuration of the readily-formable material, it can also be achieved by providing the hood-like member with an insert in the form of, e.g., wires or bands which affect the shape of the hood-like member in a manner to achieve said abutment.
That part of the suction device which is located nearest the hood-like member may be given the form of a handle with which said hood-like member can be placed in a suitable position over the tooth or teeth to be located and held in this position. This assumes that the extractor is held in position with one hand, normally by the dentist. The handle can be readily inserted into and removed from the hood-like member, which is suitably intended for one-time-use only and is therefore replaced with each new patient. The handle can be appropriately constructed so as to enable the hood-like member to be held in position without needing to hold the handle. When it is desirable that the extractor will remain in position without requiring assistance, this can be achieved, for instance, by inserting into the hood-like member an insert which will ensure that the hood-like member will abut the patient's gum or the base parts of the patient's
REFERENCES:
patent: 2637107 (1953-05-01), Daigle
patent: 2706334 (1955-04-01), Daigle
patent: 3772790 (1973-11-01), Swan-Gett et al.
patent: 4975057 (1990-12-01), Dyfvermark
patent: 4992046 (1991-02-01), Sharp
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