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Immediate definitive individualized abutments reduce peri-implant bone loss: a randomized controlled split-mouth study on 16 patients

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Abstract

Objectives

This paper aims to observe peri-implant time-related vertical bone level and soft tissue changes with immediate, non-detached glass-ceramic (lithium-disilicate) individualized abutments and dis-/reconnections.

Materials and methods

Sixteen split-mouth patients received provisionalized immediate definitive individualized abutments (test T) versus dis-/reconnected individualized abutments (control C). In group T, digital impressions were made by using titanium bases (Conelog, Camlog), and individualized abutments (E.maxCAD) and temporary crowns (TelioCAD) were designed and milled (CerecMCXL). Lithium-disilicate abutments were crystallized and luted (Multilink Hybrid Abutment) to titanium bases. Non-occluding temporary crowns were connected to abutments. After 16 weeks, definitive digital restorations were delivered. In group C, 8 weeks were allowed after healing cap mounting for conventional impressions. Lithium-disilicate individualized abutments were produced, try-ins were performed by dis-/reconnections. Crowns were luted. Cone beam computed tomography (CBCT) images were obtained at restoration delivery, 12 months and 24 months. Pink esthetic scoring was made, plaque-gingival index measurements were done and statistical analyses (Shapiro-Wilk, Mann-Whitney U, Wilcoxon’s, Spearman’s rank, α = 0.05) were completed.

Results

No implant failures occurred. At 12 months, T (−0.1 ± 0.14 mm) exhibited significantly reduced vertical bone loss only on the labial side than C (−0.24 ± 0.13 mm) (p < 0.05). In T, all sides except distal presented reduced vertical bone loss at 24 months (p < 0.05). Vertical bone loss for all measurement sides in both C (−0.12 ± 0.09 mm; −0.18 ± 0.11 mm) and T (−0.17 ± 0.11; −0.26 ± 0.10 mm) was higher for 24 months than 12 months, respectively (p < 0.05).

Conclusions

Reduced vertical bone loss was observed around implants with immediate definitive individualized abutments than abutments with repeated dis-/reconnections.

Clinical relevance

Non-detached immediate definitive lithium-disilicate individualized abutments and provisionalization through digital technology resulted in successful clinical outcomes and can be routinely applied.

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Acknowledgments

This clinical study has been supported by the Camlog Foundation (Project no: CF41104) and the authors would like to thank the scientific board of Camlog Foundation, Prof. Jürgen Becker, Dr. Alex Schar and Francoise Peters, for generous material supply and financial support as well as IvoclarVivadent for supplying ceramic abutment blocks and luting materials for the study.

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Authors and Affiliations

  1. Department of Prosthetic Dentistry, Faculty of Dentistry, Ege University, Bornova, 35100, Izmir, Turkey

    M . Erhan Çömlekoğlu

  2. Department of Periodontology, Faculty of Dentistry, Ege University, Bornova-, 35100, Izmir, Turkey

    Nejat Nizam

  3. Department of Prosthetic Dentistry, Faculty of Dentistry, Ege University, Bornova, 35100, Izmir, Turkey

    Mine Dündar Çömlekoğlu

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  1. M . Erhan Çömlekoğlu
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Correspondence to M . Erhan Çömlekoğlu.

Ethics declarations

This research involved human participants whose informed consents were also taken.

Conflict of interest

Author M. Erhan Çömlekoğlu has received a research grant from Camlog Foundation. Authors M. Erhan Çömlekoğlu, Mine Dündar Çömlekoğlu and Nejat Nizam declare that they have no conflict of interest.

Funding

This study was funded by the Camlog Foundation (Funding no: CF41104).

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (Ethical Committee of Ege University (Number: 12-3.1/16; date 20 April 2012)) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Erhan Çömlekoğlu, M..., Nizam, N. & Çömlekoğlu, M.D. Immediate definitive individualized abutments reduce peri-implant bone loss: a randomized controlled split-mouth study on 16 patients. Clin Oral Invest 22, 475–486 (2018). https://doi.org/10.1007/s00784-017-2136-9

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  • DOI: https://doi.org/10.1007/s00784-017-2136-9

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