Dental prosthesis, method of designing thereof, and method of producing thereof

A method of designing a dental prosthesis, comprising steps of:

• producing a gypsum model based on an impression taken from an oral cavity of a patient;
• measuring a secondary gypsum model or a wax model produced from the gypsum model so as to obtain three-dimensional measuring data in the case of the dental prosthesis which is to be mounted in a cavity;
• or
• measuring the gypsum model so as to obtain three-dimensional measuring data in the case of the dental prosthesis which is to be covered on the abutment tooth;
• and
• designing the dental prosthesis which is to be mounted in the cavity or covered on the abutment tooth based on the obtained three-dimensional measuring data using a computer,
• wherein a plurality of projection parts contacted with the cavity or the abutment tooth is provided, and wherein a cement space is set on a whole face opposite to the cavity or the abutment tooth except the projection parts.

A method of designing a dental prosthesis, comprising steps of:

• producing a gypsum model based on an impression taken from an oral cavity of a patient;
• measuring a secondary gypsum model or a wax model produced from the gypsum model so as to obtain three-dimensional measuring data in the case of the dental prosthesis which is to be mounted in a cavity;
• or
• measuring the gypsum model so as to obtain three-dimensional measuring data in the case of the dental prosthesis which is to be covered on the abutment tooth;
• and
• designing the dental prosthesis which is to be mounted in the cavity or covered on the abutment tooth based on the obtained three-dimensional measuring data using a computer,
• wherein a plurality of projection parts contacted with the cavity or the abutment tooth and a portion within a distance of 0.1 to 1 mm from a margin line are provided, and
• wherein a cement space is set on a whole face opposite to the cavity or the abutment tooth except the projection parts and the portion within the distance of 0.1 to 1 mm from the margin line.