Zirconia in Fixed Implant Prosthodontics
Petra Christine Guess DDS, Dr Medical Dent,
Wael Att DDS, Dr Medical Dent Habil,
Joerg Rudolf Strub DDS, Dr Medical Dent, PhD, Dr H.C.,
Corresponding Author
Petra Christine Guess DDS, Dr Medical Dent
Clinical associate professor, Department of Prosthodontics, Dental School, Albert-Ludwigs University, Freiburg, Germany;
Petra C. Guess, DDS, Dr Medical Dent, Department of Prosthodontics, Dental School, Albert-Ludwigs-University, Hugstetter Street 55, Freiburg 79106, Germany; e-mail: [email protected]Search for more papers by this authorWael Att DDS, Dr Medical Dent Habil
associate professor, Department of Prosthodontics, Dental School, Albert-Ludwigs University, Freiburg, Germany;
Search for more papers by this authorJoerg Rudolf Strub DDS, Dr Medical Dent, PhD, Dr H.C.
professor and chair, Department of Prosthodontics, Dental School, Albert-Ludwigs University, Freiburg, Germany
Search for more papers by this authorPetra Christine Guess DDS, Dr Medical Dent,
Wael Att DDS, Dr Medical Dent Habil,
Joerg Rudolf Strub DDS, Dr Medical Dent, PhD, Dr H.C.,
Corresponding Author
Petra Christine Guess DDS, Dr Medical Dent
Clinical associate professor, Department of Prosthodontics, Dental School, Albert-Ludwigs University, Freiburg, Germany;
Petra C. Guess, DDS, Dr Medical Dent, Department of Prosthodontics, Dental School, Albert-Ludwigs-University, Hugstetter Street 55, Freiburg 79106, Germany; e-mail: [email protected]Search for more papers by this authorWael Att DDS, Dr Medical Dent Habil
associate professor, Department of Prosthodontics, Dental School, Albert-Ludwigs University, Freiburg, Germany;
Search for more papers by this authorJoerg Rudolf Strub DDS, Dr Medical Dent, PhD, Dr H.C.
professor and chair, Department of Prosthodontics, Dental School, Albert-Ludwigs University, Freiburg, Germany
Search for more papers by this authorThis paper was presented at the AO meeting, Orlando, March 4–6, 2010.
ABSTRACT
Background: CAD/CAM technology in combination with zirconia ceramic has increasingly gained popularity in implant dentistry.
Purpose: This narrative review presents the current knowledge on zirconia utilized as framework material for implant-borne restorations and implant abutments, laboratory tests and developments, clinical performance, and possible future trends for implant dentistry are addressed.
Material and Methods: A review of available literature from 1990 through 2010 was conducted with search terms zirconia,”“implants,”“abutment,”“crown,” and “fixed dental prosthesis” using electronic databases (PubMed) and manual searching.
Results: Latest applications of zirconia in implant dentistry include implant abutments, multiple unit and full-arch frameworks as well as custom-made bars to support fixed and removable prostheses. High biocompatibility, low bacterial surface adhesion as well as favorable chemical properties of zirconia ceramics are reported. Zirconia stabilized with yttrium oxide exhibits high flexural strength and fracture toughness due to a transformation toughening mechanism. Preliminary clinical data confirmed the high stability of zirconia for abutments and as a framework material for implant borne crowns and fixed dental prostheses. Zirconia abutment or framework damage has rarely been encountered. However, veneering porcelain fractures are the most common technical complication in implant-supported zirconia restorations. These porcelain veneer failures have led to concerns regarding differences in coefficient of thermal expansions between core and veneering porcelain and their respective processing techniques.
Conclusion: As presently evidence of clinical long-term data is missing, caution with regard to especially extensive implant-borne zirconia frameworks is recommended.
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