Khalifa, A., Abdelhamid, A., Nassif, M., Eldakkak, S. (2019). EFFECT OF INCREASED CROWN-IMPLANT RATIO ON THE STRAIN DEVELOPED AROUND SHORT DENTAL IMPLANTS (IN VITRO STUDY). test, 44(1), 38-44. doi: 10.21608/adjalexu.2019.57574
Ala'a M. Khalifa; Ahmed M. Abdelhamid; Mohammed S. Nassif; Sherif M. Eldakkak. "EFFECT OF INCREASED CROWN-IMPLANT RATIO ON THE STRAIN DEVELOPED AROUND SHORT DENTAL IMPLANTS (IN VITRO STUDY)". test, 44, 1, 2019, 38-44. doi: 10.21608/adjalexu.2019.57574
Khalifa, A., Abdelhamid, A., Nassif, M., Eldakkak, S. (2019). 'EFFECT OF INCREASED CROWN-IMPLANT RATIO ON THE STRAIN DEVELOPED AROUND SHORT DENTAL IMPLANTS (IN VITRO STUDY)', test, 44(1), pp. 38-44. doi: 10.21608/adjalexu.2019.57574
Khalifa, A., Abdelhamid, A., Nassif, M., Eldakkak, S. EFFECT OF INCREASED CROWN-IMPLANT RATIO ON THE STRAIN DEVELOPED AROUND SHORT DENTAL IMPLANTS (IN VITRO STUDY). test, 2019; 44(1): 38-44. doi: 10.21608/adjalexu.2019.57574

EFFECT OF INCREASED CROWN-IMPLANT RATIO ON THE STRAIN DEVELOPED AROUND SHORT DENTAL IMPLANTS (IN VITRO STUDY)

Alexandria Dental Journal
Article 7, Volume 44, Issue 1, April 2019, Pages 38-44    PDF (339.27 K)
Document Type: Original Article
DOI: 10.21608/adjalexu.2019.57574
Authors
Ala'a M. Khalifa* 1; Ahmed M. Abdelhamid2; Mohammed S. Nassif3; Sherif M. Eldakkak4
1Instructor at Removable Prosthodontics Department, Faculty of Dentistry, Pharos University in Alexandria, Egypt
2Professor of Removable Prosthodontics, Prosthodontics Department, Faculty of Dentistry, Alexandria University, Egypt
3Associate Professor of Dental Biomaterials, Department of Dental Biomaterials, Faculty of Dentistry, Ain Shams University, Egypt.
4- Lecturer of Removable Prosthodontics, Prosthodontics Department, Faculty of Dentistry, Alexandria University, Egypt.
Abstract
INTRODUCTION:Implants in atrophic posterior regions of the jaw often require short dental implants leading to increased crownimplant ratio and mechanical stress. Short and small diameter dental implants have been associated with higher risk of biomechanical complications and implant failure. However the use of short implants has become increasingly common due to anatomic limitations and need to avoid surgical rehabilitation of the reduced ridge. . OBJECTIVES: Evaluation of the effect of increased crown-implant ratio on the strain developed around short dental implants compared to conventional implants length. MATERIALS AND METHODS: A bounded saddle replica was simulated using polyurethane test blocks where fourteen dental implants have been placed. Specimens were divided into two parallel groups (n=7) according to implant length, Group (I) -implants of conventional length, Group (II) implants of short length. Strain gauges were connected to a strain meter to record the developed strain. A universal testing machine was used for load application up to 100 N. The data were statistically analyzed (p≤0.05). RESULTS: Group I exhibited the lower mean micro-strain values (512.26 ± 427.39µε) than Group II (804.05 ± 487.37µε). There was no statistically significant difference between both groups (p > 0.05). There was a statistical significance between oblique loads and vertical loads for each group. CONCLUSIONS: Increasing the crown implant ratio had no significant effect on the strains developed around dental implants.
Keywords
Short implants; Long Implants; Crown Implant Ratio; Strain gauge
References
  1. Esposito M, Cannizarro G, Soardi E, Pellegrino G, Pistilli R, Felice P. A 3-year post-loading report of a randomized controlled trial on the rehabilitation of posterior atrophic mandibles: Short implants or longer implants in vertically augmented bone? Eur J Oral Implantol. 2011;4:301-11.
  2. Buser D, Mericske-Stern R, Bernard JP, Behneke A, Behneke N, Hirt HP, et al. Long-term evaluation of non-submerged ITI implants. Part 1:8-year life table analysis of a prospective multi-center study with 2359 implants. Clin Oral Implants Res. 1997;8:161-72.
  3. Nissan J, Ghelfan O, Gross O, Priel I, Gross M, Chaushu G. The effect of crown/implant ratio and crown height space on stress distribution in unsplinted implant supporting restorations. J Oral Maxillafac Surg. 2011;69:2990-4.
  4. Rossi F, Botticelli D, Cesaretti G, De Santis E, Storelli S, Lang NP. Use of short implants (6mm) in a singletooth replacement: a 5-year follow-up prospective randomized controlled multicenter clinical study. Clin Oral Implants Res. 2016;27:458-64.
  5. Bulqai H, Mashhadi M, Safari H, Samandari M, Geramipanah F. Effect of increased crown height on stress distribution in short dental implant components and their surrounding bone: A finite element analysis. J Prosthet Dent. 2015;113:548-57. 
  6. Urdaneta RA, Rodriguez S, McNeil DC, Weed M, Chuang SK. The effect of increased crown-implant ratio on single tooth locking-taper implants. Int J Oral Maxillofac Implants. 2010;25:729-43
  7. Huang H-L, Chang Y-Y, Lin D-J, Li Y-F, Chen K-T, Hsu J-T. Initial stability and bone strain evaluation of the immediately loaded dental implant: an in vitro model study. Clin Oral Implants Res. 2011;22:691–8.
  8. Kirkpatrick LA, Feeney BC. A simple guide to IBM SPSS statistics for version 20.0. Student ed. Belmont, Calif.: Wadsworth, Cengage Learning; 2013.
  9. Kassebaum DK, Nummikoski PV, Triplett RG, Langlais RP. Cross-sectional radiography for implant site assessment. Oral Surg Oral Med Oral Pathol. 1990;70:674-8.
  10. Kola MZ, Shah AH, Khalil HS, Rabah AM, Harby NM, Sabra SA, et al. Surgical templates for dental implant positioning; current knowledge and clinical perspectives. Niger J Surg. 2015;21:1-5.
  11. Vogel RC. Implant overdentures: a new standard care edentulous patients current concepts techniques. Compend Contin Educ Dent. 2008;29:270-6.
  12. Persson AS, Andersson M, Odén A, SandborghEnglund G. Computer aided analysis of digitized dental stone replicas by dental CAD/CAM technology. Dent Mater. 2008;24:1123-30.
  13. Nishioka RS, Rodrigues VA, De Santis LR, De MeloNishioka GN, Miyazaki Santos VM, Ávila Souza F. Comparative microstrain study of internal hexagon and plateau design of short implants under vertical loading. Implant Dent. 2016;25:135-9.
  14. Hegazy SA, Elshahawi IM, Elmotayam H. Stresses induced by mesially and distally placed implants to retain a mandibular distal-extension removable partial overdenture: a comparative study. Int J Oral Maxillofac Implants. 2013;28:403-7.
  15. de Faria Almeida DA, Pellizzer EP, Verri FR, Santiago JF Jr, de Carvalho PS. Influence of tapered and external hexagon connections on bone stresses around tilted dental implants: three-dimensional finite element method with statistical analysis. J Periodontol. 2014;85:261-9.
  16. Lin C-L, Kuo Y-C, Lin T-S. Effects of dental implant length and bone quality on biomechanical responses in bone around implants: a 3-d non-linear finite element analysis. Biomed Eng Appl Basis Commun. 2005;17:44-9.
  17. Misch CE, Bidez MW. Scientific rationale for dental implant design. In: Misch CE (ed). Contemporary implant dentistry. 3rd ed. St. Louis: Mosby; 2008:202- 25.
  18. Bidez MW, Misch CE. Force transfers in implant dentistry. Basic concepts and principles. Oral Implantol. 1992;18:264-74.
  19. Misch CE. Dental evaluation: Factors of stress. In: Misch CE (ed). Contemporary implant dentistry. 2nd ed. St. Louis: Mosby; 1999:123-9.
  20. Bidez MW, Misch CE. Issues in bone mechanics related to oral implants. Implant Dent. 1992;1:289-94.
  21. Weinberg LA. Reduction of implant loading using a modified centric occlusal anatomy. Int J Prosthodont. 1998;11:55-69.
  22. Richter EJ. In vivo horizontal bending moments on implants. Int J Oral Maxillofac Implants. 1998;13:232-44.
  23. Tawil G, Aboujaoude N, Younan R. Influence of prosthetic parameters on the survival and complication rates of short implants. Int J Oral Maxillofac Implants. 2006;21:275-82.
  24. Chung SH, Heo SJ, Koak JY, Kim SK, Lee JB, Han JS, et al. Effects of implant geometry and surface treatment on osseointegration after functional loading: a dog study. J Oral Rehabil. 2008;35:229-36.
  25. Moraes SL, Pellizzer EP, Verri FR, Santiago JF Jr, Silva JV. Three-dimensional finite element analysis of stress distribution in retention screws of different crown-implant ratios. Comput Methods Biomech Biomed Engin. 2015;18:689-96.
  26. Herrmann I, Lekholm U, Holm S, Kultje C. Evaluation of patient and implant characteristics as potential prognostic factors for oral implantfailures. Int J Oral Maxillofac Implants. 2005;20:220-30.
  27. Verri FR, Batista VE, Santiago JF Jr, Almeida DA, Pellizzer EP. Effect of crown-to-implant ratio on periimplant stress: A finite element analysis. Mater Sci Eng C Mater Biol Appl. 2014;45:234-40.
  28. Iplikçioğlu H, Akça K, Cehreli MC, Sahin S. Comparison of non-linear finite element stress analysis with in vitro strain gauge measurements on a morse taper implant. Int J Oral Maxillofac Implants. 2003;18:258-65.
  29. Nagasawa S, Hayano K, Niino T, Yamakura K, Yoshida T, Mizoguchi T, et al. Nonlinear stress analysis of titanium implants by finite element method. Dent Mater J. 2008;27:633-9.
  30. Pesqueira AA, Goiato MC, Filho HG, Monteiro DR, Santos DM, Haddad MF, et al. Use of stress analysis methods to evaluate the biomechanics of oral rehabilitation with implants. J Oral Implantol. 2014;40:217-28.
  31. Gentile MA, Chuang SK, Dodson TB. Survival estimates and risk factors for failure with 6 x 5.7-mm implants. Int J Oral Maxillofac Implants. 2005;20:930-7.
  32. 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.
  33. Hentschel A, Herrmann J, Glauche I, Vollmer A, Schlegel KA, Lutz R. Survival and patient satisfaction of short implants during the first 2 years of function: a retrospective cohort study with 694 implants in 416 patients. Clin Oral Implants Res. 2016;27:591-6.
  34. Lemos CA, Ferro-Alves ML, Okamoto R, Mendonça MR, Pellizzer EP. Short dental implants versus standard dental implants placed in the posterior jaws: A systematic review and meta-analysis. J Dent. 2016;47:8-17.
  35. Fan T, Li Y, Deng WW, Wu T, Zhang W. Short Implants (5 to 8 mm) Versus Longer Implants (>8 mm) with Sinus Lifting in Atrophic Posterior Maxilla: A Meta-Analysis of RCTs. Clin Implant Dent Relat Res. 2016; 19:207-15.
  36. Schulte J, Flores AM, Weed M. Crown-to-implant ratios of single tooth implant-supported restorations. J Prosthet Dent. 2007;98:1-5.
  37. Blanes RJ, Bernard JP, Blanes ZM, Belser UC. A 10- year prospective study of ITI dental implants placed in the posterior region. II: Influence of the crown-toimplant ratio and different prosthetic treatment modalities on crestal bone loss. Clin Oral Implants Res. 2007;18:707-14.
  38. Stafford GL. Short implants had lower survival rates in posterior jaws compared to standard implants. Evid Based Dent. 2016;17:115-6.
  39. Bulaqi HA, Mousavi Mashhadi M, Safari H, Samandari MM, Geramipanah F. Effect of increased crown height on stress distribution in short dental implant components and their surrounding bone: A finite element analysis. J Prosthet Dent. 2015;113:548- 57.
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