Implant Supported Overdentures - Another Tooth Replacement Option

Guidelines for Recommending Implant Supported Overdentures

• Does the patient have complaints of soreness, instability or decreased function with his/her current denture?
• Is the patient's dissatisfaction or desire for additional function a result of the original appliance design or inadequate retention?
• Has the patient been infomred of the benefits of implant-supported overdentures: increased prosthesis retention, increased chewing ability, improved nutritional status, and reduction of future bone loss?
• Is there adequate interocclusal space in the anterior segment to accommodate the prosthetic attachments on the implants? Posts extend about 3-4 mm coronal to the tissue level. Attachments add an aditional 1-2 mm of height. The retentive device occupies 3-5 mm of buccolingual space.
• Is there adequate mandibular height for implant placement? In patients who have recently lst their teeth, the alveolar ridge may actually need to be reduced to provide adequate interocclusal space for the implants and the prosthesis. Often ridge height reduction is necessary to have enough buccolingual bone width. Optimally, a 13 mm implant is employed in the antierior mandible. The mandibular residual ridge can be assessed for height with a panoramic film.
• Is the current denture adequate in height and width to retain implant overdenture attachments? The height and width of the appliance must be adequate, the borders properly extended, and the occlusion balanced.