Tag Archives: K. Vera

High Crown to Implant Ratio as Stress Factor in Short Implants Therapy

[btn url=”http://balkandentaljournal.com/wp-content/uploads/2016/07/High-Crown-to-Implant-Ratio-as-Stress-Factor-in-Short-Implants-Therapy.pdf” text_color=”#ffffff” bg_color=”#81d742″ icon=”fa-file-pdf-o” icon_position=”start” size=”14″ id=”” target=”NewWindow”]Download Article[/btn]

1 / R. Isufi1 / E. Petrela2 / L. Abazaj3 / K. Vera3

1University of Medicine Tirana, Faculty of Dental Medicine Oral and Maxillo-Facial Surgery Department
2University of Medicine Tirana, Faculty of Medicine Public Health Department
3University of Medicine Tirana, Faculty of Dental Medicine Tirana, Albania


Background/Aim: The purpose of this study was to report the outcomes of crown to implant ratio (C/IR) measurements of single-tooth short implants. The specific aim of this study was to evaluate the effect of C/ IR on crestal bone loss, assessing the success of short locking-taper implants treatment.

Materials and Methods: The cohort study was based on a sample of 33 patients, 14 males and 19 females. They were treated by at least one hydroxyapatite-coated Bicon implant, restored with Integrated Abutment Crown cementless technique and porcelain fused to metal crowns. The study was conducted between 2010 and 2015. Patients were recalled after 1-year and 2-year period time. Periapical, panoramic radiographs and clinical photos were obtained. The outcome measures were C/IR, crestal bone levels and the success of short implants therapy.

Results: After all the measurements were done on the first day of implant loading and at last visit, the mean C/IR was 1.85 (range, 0.95 to 3.20) and the mean change in the mesio-distal crestal bone levels was -0.73mm. No significant correlation was found between the C/IR and the risk for crestal bone loss nor the risk for implant failure.

Conclusions: A high C/IR has no significant effect on crestal bone levels (r= -0.151, p= 0.230) and on failure of implant treatment (p= 0.631) after the insertion of single-tooth locking-taper and implant restorations.

Keywords: crowntoimplant ratio; short implants; integrated abutment crowns


  1. Urdaneta RA, Rodriguez S, McNeil DC, Weed M, Chuang S-K. The effect of increased crown-to-implant ratio on single-tooth locking-taper implants. Int J Oral Maxillofac Implants, 2010; 25:729-743.
  2. Bidez MW, Misch CE. Clinical biomechanics in implant dentistry. In: Misch CE (ed). Contemporary Implant Dentistry, ed 3. St.Louis: Mosby, 2008, pp 543-555.
  3. Misch CE. Dental evaluation:Factors of stress. In: Misch CE (ed). Contemoporary Implant Dentistry, ed 2. St. Louis: Mosby, 1999, pp 123-129.
  4. Bidez MW, Misch CE. Force transfer in implant dentistry. Basic concepts and principles. Oral Implantol, 1992; 18:264-274.
  5. BidezMW,Misch CE. Issues in bone mechanics related to ral implants. Implant Dent, 1992; 1:289-294. [Crossref]
  6. Urdaneta RA, Marincola M. The integrated abutment crown, a screwless and cementless restoration for single-tooth implants.A report on a new technique. J Prosthodont, 2007; 16:311-318.
  7. Urdaneta RA, Marincola M, Weed M, Chuang S-K. A screwless and cementless technique for the restoration of single-tooth implants: A retrospective cohort study. J Prosthodont, 2008; 17:562-571.
  8. Bicon Dental Implants: http://www.bicon.com/b_intro_design.html
  9. American Academy of Anesthesiologists (ASA). Physical status classes. In: Hurford WE (ed). Clinical Anesthesia Procedures of the Massachusetts General Hospital, ed 5. Philadelphia: Lippincott-Raven, 1998, pp 857-861.
  10. Carl E. Misch, Contemporary Implant Dentistry, 3rd edition, 2008, pp 178-198.
  11. Misch CE, Bidez MW. Scientific rationale for dental implant design. In: Misch CE (ed). Contemporary Implant Dentistry, ed 3. St. Louis: Mosby, 2008, pp 202-225.
  12. Quirynen M, Naert I, Van Steeberghe D. Fixture design and overload influence marginal bone loss and fixture success in the Brånemark system. Clin Oral Implants Res, 1992; 3:104-111. [Crossref]
  13. Linquist LW, Rockler B, Carlsson GE. Bone resorption around fixtures in edentulous patterns treated with mandibular fixed tissue-integrated prosthesis. J Prosthet Dent, 1988; 59:59-63. [Crossref]
  14. Rokni S, Todescan R, Watson P, Pharoah M, Adegbembo AO, Deporter D. An assessment of crown-to-root ratios with sintered porous-surfaced implants supporting prostheses in partially edentulous patients. Int J Oral Maxillofac Implants, 2005; 20:69-76.
  15. Obradovic B, Dizdarevic D, Foco F. Osteosarcoma of the Mandible. A Case Report. Balk J Dent Med, 2008; 12:118-121.
  16. Schulte J, Flores AM, Weed M. Crown-to-implant ratios of single-tooth implant-supported restorations. J Prosthet Dent, 2007; 98:1-5. [Crossref]
  17. Misch CE. Treatmetn plans related to key implant positions and implant number. In:Misch CE (ed). Contemporary Implant dentistry, ed 3. St Louis: Mosby, 2008:147-159.
  18. Balshi TJ,Wolfinger GJ. Two-implant-supported single molar replacement:Interdental space requirements and comparison to alternative options. Int J Periodontics Restorative Dent 1997;17:426-435.
  19. Goodacre CJ, Bernal G, Rungcharassaeng K. Clinical complications with implants and implant prostheses. J Prosthet Dent 2007;98:1-5.
Citation Information: Balkan Journal of Dental Medicine. Volume 20, Issue 2, Pages 94–98, ISSN (Online) 2335-0245, DOI: https://doi.org/10.1515/bjdm-2016-0015, July 2016