Principles of Attachment Selection for Implant Supported Overdentures
| Principles of Attachment Selection for Implant Supported Overdentures | Hamid Shafie, DDS* and George Obeid, DDS** |
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| 6B) (Continued on P. 11)
• Insert the female abutment with finger pressure using the gold handle and the clear abutment retention sleeve. (Fig. 6C) • Torque the female abutments to 30 N/CN with a .05” hex tip. Follow the implant manufacturer’s torque level recommendations. (Figs. 6D, 6E) • Place the impression males over the female abutments. (Fig. 6F) • Inject light-body impression material around the impression males. (Fig. 6G) • Place heavy-body impression material in the stock tray and allowed it to set simultaneously with the light-body material. • Once it is set, the impression, including the impression males, is removed. Use a Bard-Parker type blade to remove any impression material that is covering the black processing inserts if necessary. (Fig. 6H) • Securely insert the female abutment analogs into the impression males. (Fig. 6I) • Fabricate the model with female abutment analogs in place. (Fig. 6J) • Place metal housings with black processing inserts over the abutment analogs. Use plaster, putty, or latex material to block-out underneath the processing males, if necessary. Do |
not use the white spacers. (Fig. 6K) • Create a baseplate that will be used for the bite block and try-in with auto-cure or light-cure resin, incorporating the metal housings. (Figs. 6L, 6M) • Following the bite registration, try-in the wax-up and complete it for processing. (Fig. 6N) • Flask the completed wax-up in the usual manner. (Fig 6O) • To increase adhesion with the acrylic, attach the male metal housings to the female analogs and sandblast. We recommend applying a metal primer to the metal housings prior to acrylic processing if possible.* (Figs. 7A, 7B on P. 12) • Place the metal housings with black inserts over the female abutment analogs. Use plaster to block-out undercuts if necessary. (Latex may be used for block out with packing or pour systems.) Note: do not use the white spacers. (Fig. 7C) • Once the acrylic is polymerized, finish the denture and use the inverted conical portion of the Locator® tool to remove the black processing male inserts. (Unscrew the top portion slightly to allow the plunger to retract). Then tighten the top portion to the middle section of the tool to remove the processing insert from the tool. (Fig. 7D) • Place the final males on the top of the middle segment of the tool *Metal Primer 2 , GC America |
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Volume 19.6 |