Non-Engaging Impression Coping Technique
Sterngold | ERA® Attachment Systems
Technique for the ERA ® Implant Abutments utilizing the Non-Engaging Impression Copings The ERA ® Implant Abutment has a number of advantages when compared to other overdenture abutments. One of those unique advantages is the ability to correct the angulation of misaligned implants. Until now, the angle correction procedure had to be performed in the mouth. However, this procedure can now be performed in the laboratory. The ERA ® Implant Abutment screws directly into the implant, bypassing any anti-rotation mechanism.
The Non-Engaging Impression Copings will record the rotational position of the internal thread of the implant, sometimes called thread timing. Two large flat sides ensure that the impression coping can only be seated into the impression in one rotational position.
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5˚
11˚
17˚
23˚
30˚
Gold Border - Dentist Procedure
Black Border - Dental Laboratory Procedure
Models are used to illustrate procedures in the mouth. The dentist will screw the correct Non-Engaging Impression Coping into each implant in the mouth and tighten by hand, using the Friction Driver.
In the laboratory the technician will screw an implant analog onto each impression coping and insert that unit into the impression.
Create a closed-tray impression, being careful not to displace the tissue. Carefully segregate each impression coping, recording its position, so that it can be returned to the same hole in the impression. Send the impression and the impression copings to the dental laboratory.
It is best to add a soft tissue replica material before pouring the model. This will allow the technician to accurately measure the depth of the tissue. Sterngold’s InstaGums ® is recommended.
The laboratory technician will use a surveyor to establish the ideal path of insertion for the overdenture. In this example, two of the implants are parallel to the appropriate path of insertion and will use the one-piece, 0 degree ERA ® Implant Abutment.
For those implants requiring angle correction, use one of the clear plastic ERA ® Implant Abutment Gauges to determine which angle correction abutment will be used. ERA ® Implant Abutments are made in 5, 11, 17, 23, and 30 degree versions.
In this example the 17 degree will be used. Once each tissue cuff and angle has been measured, the proper ERA ® Implant Abutments can be ordered.
Screw the appropriate 0° abutment, or angle correction base, into each implant on the model using the ERA ® Micro Socket and the Thumb Knob. Snap a white ERA ® Alignment Handle into the appropriate angled female component.
Snap a white Alignment Handle into the other female components. Rotate each of the angled ERA ® Micro Females until they all line up with the desired path of insertion of the denture.
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