J Korean Acad Prosthodont.  2019 Apr;57(2):171-175. 10.4047/jkap.2019.57.2.171.

Implant-assisted removable partial denture for severely atrophied mandible

• Choi B
• Kim YJ
• Lee JH

• KMID: 2444186
• DOI: http://doi.org/10.4047/jkap.2019.57.2.171

Abstract

Mandible with severe alveolar bone atrophy poses a significant challenge in terms of reproducing clinically acceptable anatomy for a removable prosthesis. To overcome this potential complication, altered cast impression technique is often recommended to capture accurate and functional gingiva tissues. It becomes possible to get proper anchors functional impression by placing 2 implants crowns which were impossible in previous implant overdenture impression technique. In this case, an 80-year old female patient with severe mandibular ridge atrophy was treated with an implant-assisted removable partial denture with two implant crowns on the canine area. An altered cast impression was taken with an individual tray on a metal framework of removable partial denture on both posterior edentulous areas. The patient was satisfied with the final prosthesis after failure of 2 previous prostheses. Clinician had a difficult time to manage disabled patient and patient were suffered with ill-fitting denture due to inaccurate impression in conventional overdenture condition. The oral rehabilitation was completed with placing 2 implants as proper anchor.

Keyword

Altered cast impression; Implant removable denture; Disabled patient; Oral rehabilitation

MeSH Terms

Alveolar Bone Loss
Atrophy
Crowns
Denture, Overlay
Denture, Partial, Removable*
Dentures
Female
Gingiva
Humans
Mandible*
Prostheses and Implants
Rehabilitation

Figure

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  Fig. 1 Patient's panoramic radiograph upon 1st visit. Severe alveolar bond resorption of mandible is found. The patient was treated previously with upper removable partial denture and lower complete denture, but not satisfied with it.

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  Fig. 2 Bar attachment with magnets. After dental implants placed on both canine of mandible, milled bar with magnets distal to the implants was delivered.

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  Fig. 3 Locator attachments. Locator attachments were delivered after fail overdenture with milled bar attachment.

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  Fig. 4 Altered cast impression technique. (A) Individual tray was fabricated on Cr-Co metal framework. Cingulum rests on both implant crowns were used as stops for tray, (B) Border molding and secondary impression were taken.

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  Fig. 5 Implant assisted removable partial denture (IARPD). Final prosthesis was delivered. The patient was satisfied with the result.

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