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Scientific article
Open access
English

A multicenter randomized controlled clinical pilot study of buccally micro-veneered lithium-disilicate and zirconia crowns supported by titanium base abutments: 1-year outcomes

Published inClinical oral implants research, p. 1-10
First online date2022-11-02
Abstract

Objectives

To investigate survival rates, technical and biologic outcomes of buccally micro-veneered allceramic single implant crowns.

Material and Methods

Sixty subjects randomly received immediately or early placed implants. Crowns out of lithiumdisilicate (n=30) and zirconia-ceramic (n=30) were bonded to titanium-base-abutments. Restorations were inspected at baseline (BL) and during follow-up-visits (6, 12-months). Technical and biologic parameters were recorded. Data were analysed descriptively. Differences between groups were tested with Student T-test. Paired T-test was used when comparing data from the same implant or tooth over time. Linear model repeated measures was used to test differences between materials over time. Differences in counts were valuated using Pearson Chi-square test. Level of significance was at p < 0.05.

Results

After a mean observation time of 13.2 months ± 2.4 months, 54 restorations were re-examined. The implant survival rate was 98.3 %, and the restoration survival rate was 100%. One early implant failure occurred. Two minor chippings occurred in lithium-disilicate restorations. No chippings or fractures occurred in any zirconia restorations at 1 year (0%). The technical complication rate was 3.7%, with 7.7% complications among the lithium-disilicate restorations and no differences between the two materials (p=0.558). At 1-year-follow-up, mean Bleeding on Probing (BOP) was higher at implants (0.27± 0.3) than adjacent teeth (0.17± 0.18) (p=0.046) with no differences between materials (p=0.36). Differences in Pocket Probing Depth (PPD) etween implants and adjacent teeth were significant (p< 0.01). Jemt Index improved significantly from BL to 1-y-follow-up (p< 0.001).

Conclusions

Preliminary results were good, suggesting that the ceramic type does not impact technical and biologic parameters.

eng
Keywords
  • Clinical Trials
  • All-ceramic single crowns
  • Implant-borne reconstructions
  • Technical outcome
  • Chipping
Citation (ISO format)
STRASDING, Malin et al. A multicenter randomized controlled clinical pilot study of buccally micro-veneered lithium-disilicate and zirconia crowns supported by titanium base abutments: 1-year outcomes. In: Clinical oral implants research, 2022, p. 1–10. doi: 10.1111/clr.14018
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Article (Accepted version)
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Identifiers
ISSN of the journal0905-7161
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Technical informations

Creation11/10/2022 3:03:00 PM
First validation11/10/2022 3:03:00 PM
Update time03/16/2023 8:53:21 AM
Status update03/16/2023 8:53:20 AM
Last indexation05/06/2024 11:59:19 AM
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