Journal List > J Korean Acad Prosthodont > v.55(3) > 1034935

Ban, Yang, Park, Lim, Yun, Shin, and Park: Rehabilitation using mandibular implant overdenture with CAD/CAM milled bar: A case report


Long-term alveolar bone resorption in edentulous patient causes difficulty in denture use. Applying an implant overdenture with 2 to 4 implants to edentulous patient is easily approachable. Moreover, it improves denture stability, support, and retention. Milled bar, the attachment used in implant overdenture, can be used to induce better stability and retention to the supporting structure than conventional bar. It has become convenient to use due to the development of CAD/CAM system which had allowed the simplification of dental techniques. In this case, application of conventional maxillary full denture and mandibular overdenture made of CAD/CAM milled bar with 4 implants showed satisfactory results in the patient who had used upper and lower full dentures for a long time.

Figures and Tables

Fig. 1

Initial panoramic radiograph.

Fig. 2

Initial intraoral photographs. (A, E) Occlusal view of maxilla and mandible, (B, D) Lateral view, (C) Frontal view.

Fig. 3

Intraoral view of the patient's old denture. (A, C) Occlusal view of maxilla and mandible, (B) Frontal view.

Fig. 4

Implant installation. (A) Panoramic view, (B) Frontal view, (C) Mandibular occlusal view.

Fig. 5

Final impression taking of maxilla and mandible (B, E) with individual trays (A, D) and Definitive cast fabrication of maxilla and mandible (C, F).

Fig. 6

Laboratory procedures using Exocad software. (A) Scanned solid abutments (gray), Mandibular teeth arrangement according to the maxillary temporary denture (purple) and antagonistic teeth (blue), (B) Confirmation of bar position, (C, D) Design of milled bar and decision of the position of customized clip.

Fig. 7

Fabrication of milled bar and verification of bar with metal framework and PEKK clip positioned in the oral cavity (A, B, C).

Fig. 8

Esthetic try-in with wax denture. (A, C) Occlusal view of maxilla and mandible, (B) Frontal view.

Fig. 9

Final restoration was placed in patient's oral cavity. (A, C) Occlusal view of maxilla and mandible, (B) Frontal view.

Fig. 10

Patient's profile. (A) Profile at first visit, (B) Profile after definitive prosthesis placement.

Table 1

Diameter, height and location of installed implant fixture



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Min-Hee Ban

Hongso Yang

Sang-Won Park

Hyun-Pil Lim

Kwi-Dug Yun

Chan Park

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