Non-Shouldered Abutments

Non-Shouldered Abutments

With 0°, 15°, and 25° angled abutments and over 18 different sizes to choose from, the non-shouldered abutment is one of Bicon's most versatile. Since it is a solid abutment, it can be prepared either intra-orally or extra-orally. The new Restorative/Laboratory kits (consisting of two sleeves and a transfer die) will facilitate impression taking, temporization, wax-ups, and the fabrication of corrective copings. The impression sleeves snap definitively onto the new non-shouldered abutments and are color-coded according to the diameter of the abutment: 4.0mm = red, 5.0mm = yellow, 6.5mm = green and 7.5mm = purple.

Non-Shouldered Abutment Considerations

• The abutment can be rotated 360˚ to reach a desired position or to achieve parallelism prior to being seated.
• The 4.0mm abutments are primarily used for maxillary laterals and bicuspids; 5.0mm abutments are more universal in their use; 6.5mm and 7.5mm abutments are ideally suited for molars.
• The diameter of each Emergence Cuff corresponds to the diameter of a non-shouldered abutment.
• Do not make an impression with the emergence cuff.
• Choose the widest abutment and sleeve (see below) that will support the interproximal papillae without encroaching upon them.

Non-Shouldered Prosthetic Component Considerations

• The impression sleeves and transfer dies are color coded according to the corresponding diameter of the non-shouldered abutment: 4.0mm = red, 5.0mm = yellow, 6.5mm = green, and 7.5mm = purple.
• The sleeves may be used for impression making, temporization, corrective copings, and/or as waxing sleeves.
• The temporization sleeves may be used in lieu of the emergence cuffs.
• Always confirm the complete seating of snap-on sleeves with either the non-shouldered abutment or colored abutment transfer die.
• It is paramount that the proper abutment transfer die height be chosen for pouring of a stone model, since all transfer dies of the same color will snap into an impression sleeve of that color.
• The diameter and height of the transfer dies are sized to match the diameter and height of a corresponding non-shouldered abutment.
• Although possible, avoid making an impression using the tooth colored temporization sleeves, since they are not color coded with their corresponding transfer dies and they are more retentive.
• Sleeves may be easily modified to suit a particular clinical need.
• Current versions of the non-shouldered abutment have a groove approximately 3.0mm above its height of contour providing retention for the new snap-on impression and temporization sleeves.
• If a sleeve is used as a waxing sleeve, the internal snap ring should be removed with a bur.

Emergence Cuff Considerations

• The diameter of each emergence cuff corresponds to the diameter of a non-shouldered abutment.
• Do not make an impression with an emergence cuff.
• If you prefer to make an impression of a non-shouldered abutment with a plastic sleeve, please refer to above, Restorative/Laboratory Kits for Non-Shouldered Abutments, section.
• The temporization sleeves may be used in lieu of the emergence cuffs.