Universal impression coping system
AssigneeNobel Biocare AB
InventorAjay Kumar
Life of this patent
Estimating the term…
Abstract
A universal impression coping system and impression coping assembly is provided for taking dental impressions of a dental restoration site and which me be used efficaciously for both open- and closed-tray impression techniques. An inexpensive transfer impression pin and coping assembly is further provided having registration means providing unique orientation of the transfer coping and visual and tactile feedback for assuring accurate dental impressions using the closed tray impression technique.
Claims38
A universal impression coping system for use in taking an accurate dental impression of an implant installed in patient's jawbone using either a closed-tray or open-tray impression technique, comprising:
- an impression pin, including a body portion having a proximal end and a distal end, said proximal end being configured and adapted to be secured to said implant and further comprising an indexing boss or recess formed therein for interlockingly engaging a corresponding mating indexing boss or recess formed on said implant, said impression pin having a central bore extending substantially completely through said impression pin and opening through said proximal and distal ends;
- a cap screw having a cap portion and a threaded shaft portion, said threaded shaft portion being adapted to pass through said bore extending through said impression pin and to threadingly engage a threaded bore of said implant, said cap portion being adapted to selectively matingly engage or abut against the distal end of said impression pin;
- and
- an embedment cap having one or more impression gripping elements and being adapted to selectively matingly engage or abut against the distal end of said impression pin, said embedment cap having a central bore extending substantially therethrough;
- whereby said cap screw may be selectively engaged or abutted to said impression pin for use in a closed-tray impression technique and whereby said embedment cap may be selectively engaged or abutted to said impression pin for use in an open-tray impression technique.
A transfer impression coping for use in taking an accurate dental impression of an implant installed in patient's jawbone, comprising:
- an impression pin, including a body portion having a proximal end and a distal end, said proximal end being configured and adapted to be secured to said implant and further comprising an indexing boss or recess formed therein for interlockingly engaging a corresponding mating indexing boss or recess formed on said implant, said impression pin having a central bore extending substantially completely through said impression pin and opening through said proximal and distal ends, said body portion further includes one or more longitudinal key-ways wherein said keyways are defined by a pair of planar surfaces at substantially right angles with one another and defining a dove tail key therebweteen;
- and
- a cap screw having a cap portion and a threaded shaft portion, said threaded shaft portion being adapted to pass through said bore extending through said impression pin and to threadingly engage a threaded bore of said implant, said cap portion being adapted to selectively matingly engage or abut against the distal end of said impression pin.
A pick-up impression coping for use in taking an accurate dental impression of an implant installed in patient's jawbone, comprising:
- an impression pin, including a body portion having a proximal end and a distal end, said proximal end being configured and adapted to be secured to said implant and further comprising an indexing boss or recess formed therein for interlockingly engaging a corresponding mating indexing boss or recess formed on said implant, said impression pin having a central bore extending substantially completely through said impression pin and opening through said proximal and distal ends;
- an embedment cap having one or more impression gripping elements and being adapted to selectively matingly engage or abut against the distal end of said impression pin, said embedment cap having a central bore extending substantially therethrough;
- and
- a bolt or screw having a head portion and a threaded shaft portion, said bolt or screw being sized and adapted to pass through said bore extending through said embedment cap and through said bore extending through said impression pin and to threadingly engage said threaded bore of said implant.
A pick-up impression coping for use in taking an accurate dental impression of an implant installed in patient's jawbone, comprising:
- an impression pin, including a body portion having a proximal end, a distal end and a longitudinal axis extending between said proximal end and said distal end, said proximal end being configured and adapted to be secured to said implant and further comprising an indexing boss or recess formed therein for interlockingly engaging a corresponding mating indexing boss or recess formed on said implant, said impression pin having a central bore extending substantially completely through said impression pin and opening through said proximal and distal ends;
- an embedment cap having a retention surface that lies transverse to the longitudinal axis, said embedment cap and being adapted to selectively matingly engage or abut against the distal end of said impression pin and having a central bore extending substantially therethrough;
- and
- a bolt or screw having a head portion and a threaded shaft portion, said bolt or screw being sized and adapted to pass through said bore extending through said embedment cap and through said bore extending through said impression pin and to threadingly engage said threaded bore of said implant.
Dependencies are inferred from the claim text.