Implant Placement for Mandibular Overdentures using the Neutral Zone Concept

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Patients: A 56-year-old woman presented with a severely resorbed edentulous mandible, complaining of poor retention and stability of her existing ill-fitting removable partial denture. The original maxillary right lateral incisor and canine were present. A conventional overdenture and implant-retained overdenture were selected for maxillary and mandibular rehabilitation, respectively. The existing mandibular denture yielded an unacceptable position of implant placement. After molding of the denture border and cameo surface was conducted, the existing denture modified using the neutral zone concept allowed proper implant placement.
Discussion: The position of implant placement affects the function and esthetics of an implant-supported overdenture. Preparation of diagnostic and surgical templates using the neutral zone concept facilitates proper implant placement for comfortable dentures. Correctly remolded denture borders and cameo surface allow proper implant placement.
Conclusion: The cameo surface for implant-retained or-supported overdentures needs to be prepared appropriately to obtain satisfactory implant position, in terms of esthetics, function, comfort, or patient satisfaction.