Implant-retained removable-fixed prostheses
An implant-retained removable-fixed prosthesis is a two-part appliance. consisting of a fixed bar which patients cannot remove, and a removable framework of prosthetic teeth which can be removed for cleansing and maintenance by the patient.
Removable prosthesis such as conventional dentures may not always be stable, particularly when the jaw bone is resorbed. However, with an implant-retained removable-fixed prosthesis, the prosthetic teeth are held securely in position by a metal bar. This bar is fixed (held by screws) onto dental implants placed in your jaw bone.
The prosthesis ‘clicks’ onto the bar by means of retention clips. The advantage of this appliance is that it is far more retentive when compared to locators / overdentures.
Bar fabrication procedures have been in practice for many years. This technology has now evolved considerably and has been digitised. Bars and frameworks are now milled using CAD / CAM (Computer Aided Design / Computer Aided Milling) technology at laboratories.
Implant bars are made of metal alloys. Acrylic or ceramic teeth are used for construction of the prosthesis. These prostheses can prove to be very effective for patients with severely flat ridges, history of trauma/ bone lost to pathologies of the jaw.
Call us on (03) 9853 2845 to find out more about implant-retained, removable-fixed prostheses.
A comprehensive examination
During the initial examination, radiographs and scans are conducted to assess the volume and quantity of bone available. Using this information, the implant numbers and position are determined and a personalised treatment plan is fabricated. In some cases, where required, impressions are taken to fabricate temporary dentures.
Inserting dental implants
3D planning software is used to finalise the implant positions. Dental implant surgery is a pain-free procedure involving a minor incision in the gums over the jaw bone. The implants are inserted as planned. Healing caps are placed and the area is monitored. A temporary/ immediate denture may be inserted during the healing period.
A period of healing is required to allow the jaw bone to fuse with the implant – a process known as osseointegration. This may take several months (3-6) depending upon the site of implant placement, medical condition and bone quality of the individual patient.
Fabricating the prostheses
Following healing and osseointegration, a series of records are taken over 4-5 visits. This involves, primary and secondary impressions, recording jaw relationships, try in and insertion. These records are sent to the laboratory where technicians fabricate the implant supported fixed bar as well as the permanent overdenture.
Insert and follow-up
Following fabrication, both the bar and the overdenture are checked for alignment and fit. Adjustments are made and the support bar is anchored into position. A final try-in of fit, shape, shade and appearance of the prosthesis is carried out. The implant overdenture is then inserted onto the bar. Follow up appointments are scheduled to ensure that the implant site and prosthesis are closely monitored over the next few months.