Method and elements for the fabrication of a prosthetic dental appliance
OwnerEmanuel Crisalliinventor
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Abstract
A method for the fabrication of prosthetic dental appliances such as partials, by which the need for the formation of a refractory model is eliminated. According to the method, a resilient plastic appliance is formed by shaping heat-softenable plastic elements to fit a master model and bonding these elements together with an adhesive. The resultant plastic appliance is then removed from the model and may be used as a permanent appliance or as a model for the casting of a permanent appliance.
Claims27
A method of fabricating a prosthetic dental appliance, said method comprising the steps of:
- taking an impression of existing dentition in the mouth of the eventual wearer of the appliance;
- making a positive model of the dentition from the impression;
- heat softening a resilient preformed plastic bar and resilient preformed plastic clasps;
- fitting the bar and clasps to the positive model in a predetermined arrangement;
- bonding the clasps to the bar to form a plastic dental appliance;
- removing the plastic appliance from the positive model;
- and
- fabricating a permanent dental appliance using the plastic appliance.
A method of fabricating a prosthetic dental appliance to fit the existing dentition in the mouth of the eventual wearer, said method comprising the steps of:
- making a positive model of the existing dentition;
- heat softening without melting preformed resilient clasps, retention material, and a bar formed of one of the plastics of the group consisting of styrene, acrylonitrile butadiene styrene, and polyethylene;
- fitting the heat softened clasps, retention material, and bar to the positive model;
- bonding the fitted clasps, retention material, and bar together to form a plastic appliance fitted on the model;
- and
- removing the appliance from the model.
A prosthetic dental appliance framework comprising:
- at least two clasps;
- a curved bar arching between said clasps;
- and
- retention material attached to said bar and said clasps, said clasps, bar, and retention material being formed of a resilient heat-softenable plastic having a softening point in the range of 180.degree.-250.degree. F., whereby said clasps, bar, and retention material may be heat softened and shaped to fit a model representative of the existing dentition of an eventual wearer's mouth and subsequently may be cooled below the softening point and removed from the model without distortion.
Dependencies are inferred from the claim text.