|
KMID : 1023820160080030194
|
|
The Journal of Advanced Prosthodontics
2016 Volume.8 No. 3 p.194 ~ p.200
|
|
|
Early complications and performance of 327 heat-pressed lithium disilicate crowns up to five years
|
|
Fabian Huettig
Ulf Peter Gehrke
|
|
|
Abstract
|
|
|
PURPOSE : The prospective follow-up aimed to assess the performance of lithium disilicate crowns and clinical reasons of adverse events compromising survival and quality.
MATERIALS AND METHODS : 58 patients were treated with 375 heat-pressed monolithic crowns, which were bonded with resin cement. Annual recalls up to five years included a complete dental examination as well as quality assessment using CDA-criteria. Any need for clinical intervention led to higher complication rate and any failure compromised the survival rate. Kaplan-Meier-method was applied to all crowns and a dataset containing one randomly selected crown from each patient.
RESULTS : Due to drop-outs, 45 patients (31 females, 14 males) with the average age of 43 years (range = 17-73) who had 327 crowns (176 anterior, 151 posterior; 203 upper jaw, 124 lower jaw) were observed and evaluated for between 4 and 51 months (median = 28). Observation revealed 4 chippings, 3 losses of retention, 3 fractures, 3 secondary caries, 1 endodontic problem, and 1 tooth fracture. Four crowns had to be removed. Survival and complication rate was estimated 98.2% and 5.4% at 24 months, and 96.8% and 7.1% at 48 months. The complication rate was significantly higher for root canal treated teeth (12%, P<.01) at 24 months. At the last observation, over 90% of all crowns showed excellent ratings (CDA-rating Alfa) for color, marginal fit, and caries.
CONCLUSION : Heat pressed lithium disilicate crowns showed an excellent performance. Besides a careful luting, dentists should be aware of patients’ biological prerequisites (grade of caries, oral hygiene) to reach full success with these crowns.
|
|
|
KEYWORD
|
|
|
Dental bonding, Dental restoration failure, Dental marginal adaptation, Dental porcelain, Follow-up studies, Survival analysis
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
  
|
|