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US 5,967,783 AGranted
Threaded dental implant with a core to thread ratio facilitating immediate loading and method of installation
OwnerRobert S. Urainventor
Life of this patent
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Abstract
A dental implant having an external thread configuration and/or a structure which facilitates a single step, immediate load dental implant/prosthesis installation, which significantly reduces healing time between surgeries and which comprises a threaded implant shaft having a core to thread ratio of about 0.45 to about 0.70. The invention also relates to a method for installing such a dental implant.
Claims21
An immediate load dental implant comprising:
- an elongated externally threaded shaft having a longitudinal axis;
- a distal end;
- a proximal end;
- a rotation head at said proximal end, said shaft and said proximal end being free of any internal bore;
- and
- said threaded shaft including a threaded portion with a plurality of helical threads extending from said distal end toward said proximal end, said helical threads comprising an inner edge defining a thread minor diameter, an outer edge defining a thread major diameter, a proximal surface extending between said inner edge and said outer edge and facing said proximal end and a distal surface extending between said inner edge and said outer edge and facing said distal end, the ratio of said thread minor diameter to said thread major diameter defining a core to thread ratio, with said core to thread ratio being about 0.45 to about 0.70.
3 more elements
A method of installing a dental implant and appliance comprising the steps of:
- providing a dental implant having a proximal end, a distal end and an externally threaded shaft, said shaft including a threaded portion with a plurality of helical threads extending from said distal end toward said proximal end, said helical threads comprising an inner edge defining a thread minor diameter, an outer edge defining a thread major diameter, a proximal surface extending between said inner edge and said outer edge and facing said proximal end and a distal surface extending between said inner edge and said outer edge and facing said distal end, the ratio of said thread minor diameter to said thread major diameter defining a core to thread ratio, said core to thread ratio being about 0.45 to about 0.70 and said implant further including a prosthesis receiving post positioned at said proximal end and extending outwardly therefrom;
- drilling a hole into a tooth root or bone at a desired location;
- inserting said distal end into said hole and rotating said dental implant to a desired degree of installation;
- and
- attaching a prosthesis to said prosthesis receiving post immediately after said insertion step.
2 more elements
A dental implant comprising:
- an elongated externally threaded shaft of the type having sharp bladed threads and longitudinal axis wherein said threads comprise an inner edge defining a thread minor diameter and an outer edge defining a thread major diameter with the ratio of said thread minor diameter to said thread major diameter defining a core to thread ratio and wherein said threads have a core to thread ratio of about 0.45 or greater, but no greater than 0.70;
- a distal end;
- and
- an integral prosthesis receiving post positioned at said proximal end and extending outwardly therefrom.
1 more element
Dependencies are inferred from the claim text.