Document Detail


Esthetic outcomes with porcelain-fused-to-ceramic and all-ceramic single-implant crowns: a randomized clinical trial.
MedLine Citation:
PMID:  21158931     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
OBJECTIVES: the aim of this randomized-controlled clinical trial was to compare the objective and subjective esthetic outcomes of two types of screwed-retained single-implant crowns.
MATERIALS AND METHODS: participants were randomly assigned to the test (all-ceramic) and control [porcelain-fused-to-ceramic (PFM)] groups and were seen under investigation at baseline (B), crown insertion (CI), 1-year follow-up (1Y), and 2-year follow-up (2Y). Objective parameters were assessed by an intra-oral digital photograph (1:1 ratio), a study cast, a standardized radiograph, periodontal/peri-implant measurements, and questionnaires were obtained for the subjective parameters. In addition, pink esthetic score (PES) and white esthetic score (WES) were calculated for both groups. For the subjective evaluation, a visual analogue scale (VAS) questionnaire was used to assess the level of patient satisfaction regarding the esthetic outcome. Then, nine expert clinicians visually inspected and assessed subjective evaluation at the professional level. Statistical analysis was used to compare between groups and investigational appointments.
RESULTS: twenty patients were included in the study, 10 allocated to the all-ceramic group and 10 to the PFM group. No statistically significant differences were observed for the objective measurements comparing the test and control groups. Minor chipping of the ceramic veneering material was observed in the two patients of control group. The mean difference for all groups comparing objective parameters revealed an increase of papilla height between time points. A slight recession (0.26 mm) of the peri-implant mucosal margin at the implant site was observed between 1Y and 2Y. Mean values for PES and WES were 13.9 and 13.1 for the PFM group and for the all-ceramic group, respectively. These values were not statistically significant. Implant crown volume, outline, translucency, and characterization showed major discrepancies with the contra-lateral natural teeth. As for subjective parameters, VAS patients' responses regarding their perceptions of the esthetic outcome showed no statistical differences between groups and clinicians' accuracy scores were 50% and 47% for PFM and all-ceramic crowns, respectively.
CONCLUSION: PFM and all-ceramic single-implant restorations may be indistinguishable from each other regarding the objective/subjective assessment of esthetic integration. The material chosen for fabricating an implant crown per se does not ensure an optimal esthetic outcome if other esthetic parameters are not present.
Authors:
German O Gallucci; Linda Grütter; Rabah Nedir; Mark Bischof; Urs C Belser
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-09-24
Journal Detail:
Title:  Clinical oral implants research     Volume:  22     ISSN:  1600-0501     ISO Abbreviation:  Clin Oral Implants Res     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2010-12-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9105713     Medline TA:  Clin Oral Implants Res     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  62-9     Citation Subset:  D    
Affiliation:
Department of Restorative Dentistry and Biomaterials Sciences, Harvard School of Dental Medicine, Harvard University, Boston, MA 02115, USA. german_gallucci@hsdm.harvard.edu
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