[Comparison of cast and metal-ceramic veneer crowns; results of a follow-up study in wearers of partial prostheses].
The results of follow-up examinations of 635 gold cast and 359 metal ceramic veneer crowns inserted primarily for caries prophylaxis and static reasons in patients with partial dentures on the average 4 1/2 years ago are reported. All crowns fulfilled their caries-preventing functions well. More than 93% were free of secondary caries, this was especially so when the crown margin was still below the gingiva. The conditions at the crown margins were studied. It was found that margin seal, type of crown as well as interdependent variables like age, periodontal condition and personal oral hygiene had a significant influence on whether the crown margin was still in the gingival sulcus. Metal ceramic veneer crowns were vestibularly exposed more frequently than cast crowns. The reason for this was found to be defective construction. The study showed further that lesions at the baked veneer crown occurred more often than had been expected so far. It is estimated that they amount to 3% with widely used ceramic crowns.
D002516:Ceramics; D003442:Crowns / Q000592:standards*; D001840:Dental Bonding / Q000009:adverse effects; D003731:Dental Caries / Q000175:diagnosis; D003830:Denture, Partial, Fixed / Q000592:standards; D003832:Denture, Partial, Removable / Q000592:standards; D005500:Follow-Up Studies; D006046:Gold; D006801:Humans; D008670:Metals; D010510:Periodontal Diseases / Q000175:diagnosis; D013499:Surface Properties
D008670:Metals; D006046:Gold
Guss- und metallkeramische Verblendkrone im Vergleich--Ergebnisse einer Nachuntersuchung bei Teilprothesenträgern