Mechanical basis for bone retention around dental implants

Harold Alexander, John L. Ricci, George J. Hrico

Research output: Contribution to journalArticlepeer-review


This study, analytically, through finite element analysis, predicts the minimization of crestal bone stress resulting from implant collar surface treatment. A tapered dental implant design with (LL) and without (control, C) laser microgrooving surface treatment are evaluated. The LL implant has the same tapered body design and thread surface treatment as the C implant, but has a 2-mm wide collar that has been laser micromachined with 8 and 12 μm grooves in the lower 1.5 mm to enhance tissue attachment. In vivo animal and human studies previously demonstrated decreased crestal bone loss with the LL implant. Axial and side loading with two different collar/bone interfaces (nonbonded and bonded, to simulate the C and LL surfaces, respectively) are considered. For 80 N side load, the maximum crestal bone distortional stress around C is 91.9 MPa, while the maximum crestal bone stress around LL, 22.6 MPa, is significantly lower. Finite element analysis suggests that stress overload may be responsible for the loss of crestal bone. Attaching bone to the collar with LL is predicted to diminish this effect, benefiting crestal bone retention.

Original languageEnglish (US)
Pages (from-to)306-311
Number of pages6
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Issue number2
StatePublished - Feb 2009


  • Biomechanics
  • Bone remodeling
  • Dental/endosteal implant
  • Finite element analysis
  • Implant interface

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering


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