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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over the soft tissue and covers all of the stitches. (Figs. 19B, 19C) • Use a large laboratory round |
carbide bur to cut a hole in the denture base exactly above each implant. Continue the hole toward the lingual flange and create a window. This hole should be large enough to insert a pre-loaded metal housing over the implant with no contact between the metal housing and the denture base.
• Insert the denture and verify that there is no contact between each attachment and the denture base. If there is interference, trim the denture base. (Fig. 19D) • Apply self-curing acrylic (Fig. 19E) around and above each metal housing as well as inside each hole in the denture base. Ensure that the external retention ridge on the outside of the metal housing is completely covered with acrylic. • Insert the denture into the patient’s mouth over the attachment and guide the patient into maximum intercuspation Note: do not allow the patient to close firmly, because this could cause improper positioning of the males relative to the females. (Fig. 19F) • After the acrylic is set, remove the overdenture, fill any void with acrylic, and finish and polish the prosthesis. • Replace each black female nylon cap with an extra-soft green final female cap. If the patient desires additional retention, replace the yellow female cap with a more retentive female cap six to eight weeks after implant surgery. (Figs. 19G, 19H) |
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Volume 19.6 |