12/13/2023 0 Comments Zirconia arch bridgeLike the hybrid denture, a minimum of 4 implants must be placed to support the full-arch solid zirconia implant-retained prosthesis.Īs with any implant restoration, the edentulous patient’s quantity of available bone must be assessed to determine whether a monolithic zirconia implant restoration is indicated. The longer the patient has gone without teeth, the less bone volume the patient is likely to have, making CBCT scanning an especially valuable tool in cases in which the patient presents for treatment as a denture-wearer. The data gained from CBCT scanning can also help in determining the optimal positioning, diameter, and length of the implants. Preliminary impressions, radiography and, in many cases, CBCT scanning, are needed for a thorough analysis of the edentulous arch and underlying anatomy. The end result is a fixed prosthesis that, like the hybrid denture, exhibits the form and function of natural teeth, but has a monolithic construction that is optimally suited to withstand the impact of dental functioning in the long term.Ĭlinical Considerations and Diagnosis and Treatment Planning When considering the BruxZir Full-Arch Implant Prosthesis for the individual patient, the same clinical considerations involved in treatment planning a fixed hybrid denture apply, including an evaluation of vital anatomical structures, vertical dimension of occlusion (VDO), phonetics, aesthetics, and dental function. The key difference is the inclusion of a temporary polymethyl methacrylate (PMMA) implant prosthesis that maximizes the accuracy of the restorative process by providing the patient with an opportunity to “test drive” the definitive prosthetic design before the final restoration is milled from the solid zirconia. To provide patients with this aesthetic, more durable restoration, a clinical protocol has been established that is nearly identical to that of the fixed hybrid denture. 7,8 While porcelain veneer chipping has been an issue in a small number of cases, this is not a concern for these prostheses, which are constructed of 100% monolithic zirconia. In clinical studies, zirconia-based full-arch implant restorations have performed exceptionally well. With the arrival of the solid zirconia full-arch implant retained prosthesis (such as the BruxZir Full-Arch Implant Prosthesis ), we now have a prosthetic option that provides the stability and function of the screw-retained hybrid denture, but with a monolithic construction that avoids the cracks, chipping, and staining that often compromise acrylic appliances. Although these screw-retained hybrid dentures have performed exceptionally well, breakage has been an issue, the most common causes being fracture of the acrylic base and debonding of the prosthetic teeth. The body of the prosthesis has consisted of acrylic, in which prosthetic teeth are bonded in the manner of a traditional denture. The fixed full-arch prosthesis has typically connected to the implants through a metal framework via screws that can only be removed by the practitioner. Patients who have had an edentulous arch restored with a fixed implant prosthesis report higher levels of comfort, dental function, and quality of life than those treated with a removable overdenture. By permanently attaching to the implants, the fixed full-arch implant restoration most closely replicates the form and function of natural teeth. 1-3 For clinicians offering implant treatment to their edentulous patients, there are many restorative options, ranging from the placement of 2 dental implants to hold a removable overdenture in place to the delivery of a fixed full-arch restoration over 4 or more implants.Īlthough both removable and fixed implant restorations represent a significant advancement over the stability and aesthetics offered by traditional dentures, the screw-retained prosthesis has emerged as the premium treatment option. Their superior prosthetic stability and dental function, along with their capacity to mitigate bone loss and preserve the oral and facial structures of the patient, make them a much better option than the traditional denture. INTRODUCTION Full-arch implant restorations afford life-changing benefits to the fully edentulous patient.
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