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CASE PRESENTATION: Stabilizing a Maxillary Denture With Narrow-Diameter Overdenture Implants

Categories: CBCT

Author(s): Michael David Scherer

Date: 05-13-2020 08:00:19 am


A healthy 75-year-old female presented with a loose maxillary complete denture and the desire to place implants to assist the denture to remain in place. Approximately 20 years ago, she had implants placed on her mandibular arch and an implant overdenture fabricated. She was always told, however, that her bone was insufficient in her maxillary arch for implants. She was referred to the author’s practice for evaluation for narrow-diameter implant placement.

A CBCT scan of the patient was made using cotton rolls for occlusal and soft-tissue separation in combination with a radiopaque PVS impression liner placed on the intaglio of her maxillary denture to enhance the radiographic visualization. A second CBCT scan of the denture was made and an extraoral digital impression was used with an intraoral scanner (3M True Definition Scanner, 3M). Six 2.4 mm x 12 mm Zest LOCATOR Overdenture Implants (LODI, Zest Dental Solutions) were planned in the computer software (Invivo, Anatomage). A computerized surgical guide was planned and fabricated (Anatomage Guide, Anatomage).

The patient was anesthetized, complete adaptation of the surgical guide confirmed, osteotomies prepared, and implants were placed using a minimally invasive technique. Recesses in the denture were prepared using specialized burs specifically designed for overdentures (Denture Prep & Polish Kit, Zest Dental Solutions). LOCATOR abutments (Zest Dental Solutions) were attached to the implants and connected the denture the same day using an overdenture attachment material (CHAIRSIDE, Zest Dental Solutions). The LOCATOR Black Processing Male inserts were kept inside the denture, and the patient was seen for recall 8 weeks later, when the tissues were fully healed. At the recall appointment, the inserts were changed from the processing males to the light, standard-range retentive male inserts. The patient was followed up over the course of several years and has continued to report a high degree of satisfaction.

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