Implant Supported Single Crowns With Different Retention Modes
NCT ID: NCT04707716
Last Updated: 2026-01-27
Study Results
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Basic Information
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COMPLETED
NA
39 participants
INTERVENTIONAL
2021-03-04
2025-11-13
Brief Summary
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
NONE
Study Groups
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conometric concept (Acuris system)
single implant crown retention using friction only
conometric concept Acuris system
implant crown retention type using friction only
screw retention
screw retained implant Crown fixation
screw retention
screw retained implant crown
cementation
cement retained implant Crown fixation
cementation
cement retained implant crown
Interventions
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conometric concept Acuris system
implant crown retention type using friction only
screw retention
screw retained implant crown
cementation
cement retained implant crown
Eligibility Criteria
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Inclusion Criteria
Exclusion Criteria
* Good periodontal status: BOP \< 20%, PI \< 30%, no PD \> 4mm
* No heavy smokers (\< 10 cigarettes/day)
* at least 1 missing tooth in the premolar and molar region (with at least a mesial neighboring tooth/implant showing adequate hard- and soft tissue situation without the need of crestal hard- or soft tissue augmentation) either in the maxilla or in the mandible requiring implant therapy for reconstruction, requiring sinus floor augmentation or not.
* Insufficient bone volume for implant placement requiring GBR (guided bone regeneration) procedure in crestal area.
* Heavy Smokers (\>10 cigarettes/day)
* Medication with a contraindication for implant therapy (especially antiresorptive therapy, ongoing or recently completed local radiotherapy, systematic diseases, ongoing immunosuppressive therapy, functional disorders like Bruxism).
* Skeletal immaturity.
* Any active malignancy or ongoing treatment for malignancy.
* An active infection (e.g. caries, gingivitis, periodontitis) at or in the neighboring area of the operative site.
* Pregnancy
* unable or unwilling to return for follow-up visits for a period of at least 16 months
18 Years
99 Years
ALL
Yes
Sponsors
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Medical University of Graz
OTHER
Responsible Party
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Principal Investigators
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Norbert Jakse, UnivProfDDr
Role: PRINCIPAL_INVESTIGATOR
Department of Dental Medicine and Oral Health
Locations
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Medical University of Graz, Department of Dental Medicine and Oral Health, Division of Oral Surgery and Orthodontics
Graz, , Austria
Countries
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References
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DeCarlo AA, Grenett HE, Harber GJ, Windsor LJ, Bodden MK, Birkedal-Hansen B, Birkedal-Hansen H. Induction of matrix metalloproteinases and a collagen-degrading phenotype in fibroblasts and epithelial cells by secreted Porphyromonas gingivalis proteinase. J Periodontal Res. 1998 Oct;33(7):408-20. doi: 10.1111/j.1600-0765.1998.tb02337.x.
Jemt T. Regeneration of gingival papillae after single-implant treatment. Int J Periodontics Restorative Dent. 1997 Aug;17(4):326-33.
Kraus RD, Epprecht A, Hammerle CHF, Sailer I, Thoma DS. Cemented vs screw-retained zirconia-based single implant reconstructions: A 3-year prospective randomized controlled clinical trial. Clin Implant Dent Relat Res. 2019 Aug;21(4):578-585. doi: 10.1111/cid.12735. Epub 2019 Mar 12.
Lekholm U, Adell R, Lindhe J, Branemark PI, Eriksson B, Rockler B, Lindvall AM, Yoneyama T. Marginal tissue reactions at osseointegrated titanium fixtures. (II) A cross-sectional retrospective study. Int J Oral Maxillofac Surg. 1986 Feb;15(1):53-61. doi: 10.1016/s0300-9785(86)80011-4.
Lemos CA, de Souza Batista VE, Almeida DA, Santiago Junior JF, Verri FR, Pellizzer EP. Evaluation of cement-retained versus screw-retained implant-supported restorations for marginal bone loss: A systematic review and meta-analysis. J Prosthet Dent. 2016 Apr;115(4):419-27. doi: 10.1016/j.prosdent.2015.08.026. Epub 2015 Nov 14.
Lorenzoni M, Pertl C, Wegscheider W, Keil C, Penkner K, Polansky R, Bratschko RO. Retrospective analysis of Frialit-2 implants in the augmented sinus. Int J Periodontics Restorative Dent. 2000 Jun;20(3):255-67.
Ma J, Kitti U, Teronen O, Sorsa T, Husa V, Laine P, Ronka H, Salo T, Lindqvist C, Konttinen YT. Collagenases in different categories of peri-implant vertical bone loss. J Dent Res. 2000 Nov;79(11):1870-3. doi: 10.1177/00220345000790110901.
Meissen R, Mintcheva M, Netuschil L. Matrix metalloproteinase-8 levels in peri-implant sulcus fluid adjacent to titanium and zirconium nitride surfaces. Int J Periodontics Restorative Dent. 2014 Jan-Feb;34(1):91-5. doi: 10.11607/prd.1504.
Penarrocha-Oltra D, Monreal-Bello A, Penarrocha-Diago M, Alonso-Perez-Barquero J, Botticelli D, Canullo L. Microbial Colonization of the Peri-Implant Sulcus and Implant Connection of Implants Restored With Cemented Versus Screw-Retained Superstructures: A Cross-Sectional Study. J Periodontol. 2016 Sep;87(9):1002-11. doi: 10.1902/jop.2016.160017. Epub 2016 May 6.
Sailer I, Muhlemann S, Zwahlen M, Hammerle CH, Schneider D. Cemented and screw-retained implant reconstructions: a systematic review of the survival and complication rates. Clin Oral Implants Res. 2012 Oct;23 Suppl 6:163-201. doi: 10.1111/j.1600-0501.2012.02538.x.
Sorsa T, Tjaderhane L, Konttinen YT, Lauhio A, Salo T, Lee HM, Golub LM, Brown DL, Mantyla P. Matrix metalloproteinases: contribution to pathogenesis, diagnosis and treatment of periodontal inflammation. Ann Med. 2006;38(5):306-21. doi: 10.1080/07853890600800103.
Sorsa T, Hernandez M, Leppilahti J, Munjal S, Netuschil L, Mantyla P. Detection of gingival crevicular fluid MMP-8 levels with different laboratory and chair-side methods. Oral Dis. 2010 Jan;16(1):39-45. doi: 10.1111/j.1601-0825.2009.01603.x. Epub 2009 Jul 8.
Teughels W, Van Assche N, Sliepen I, Quirynen M. Effect of material characteristics and/or surface topography on biofilm development. Clin Oral Implants Res. 2006 Oct;17 Suppl 2:68-81. doi: 10.1111/j.1600-0501.2006.01353.x.
Thoma DS, Sailer I, Muhlemann S, Gil A, Jung RE, Hammerle CHF. Randomized controlled clinical study of veneered zirconia abutments for single implant crowns: Clinical, histological, and microbiological outcomes. Clin Implant Dent Relat Res. 2018 Dec;20(6):988-996. doi: 10.1111/cid.12674. Epub 2018 Oct 17.
Vindasiute E, Puisys A, Maslova N, Linkeviciene L, Peciuliene V, Linkevicius T. Clinical Factors Influencing Removal of the Cement Excess in Implant-Supported Restorations. Clin Implant Dent Relat Res. 2015 Aug;17(4):771-8. doi: 10.1111/cid.12170. Epub 2013 Nov 14.
Other Identifiers
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32-578 ex 19/20
Identifier Type: -
Identifier Source: org_study_id
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