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Four‐year clinical results of fixed dental prostheses with zirconia substructures (Cercon): end abutments vs. cantilever design
Author(s) -
Wolfart Stefan,
Harder Sönke,
Eschbach Stefanie,
Lehmann Frank,
Kern Matthias
Publication year - 2009
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.2009.00693.x
Subject(s) - dentistry , molar , medicine , orthodontics , abutment , crown (dentistry) , dental prosthesis , dental abutments , surgery , implant , civil engineering , engineering
The purpose of this prospective study was to evaluate the clinical outcome of three‐ to four‐unit posterior all‐ceramic fixed dental prostheses (FDPs) made of yttria‐stabilized tetragonal zirconia‐polycrystal ceramic frameworks (CerconBase; Degudent). Fifty‐eight restorations were placed in 48 patients. Twenty‐four FDPs had an end abutment design (EAD) replacing 3 premolars and 21 molars. Thirty‐four FDPs had a cantilever design (CD) replacing 11 premolars and 23 molars. The frameworks had a minimum proximal connector dimension of 3 × 3 mm. The fixed dental prostheses were cemented with glass‐ionomer cement after air‐abrading the inner crown surfaces. Three FDPs were defined as drop‐outs. The mean observation period was 48 ± 7 months for the EAD (21 patients/24 FDPs) and 50 ± 14 months for the CD (25 patients/31 FDPs). The 4‐yr survival rate, according to the Kaplan–Meier analyses, was 96% for the EAD and 92% for the CD. The technical complication rate was 13% for the EAD and 12% for the CD, and the biological complication rate was 21% for the EAD and 15% for the CD. For none of the analyses were significant differences found between both groups. After 4 yr the clinical outcome of three‐ to four‐unit posterior FDPs with EAD and CD was promising.