Osseointegration of dental implants without primary stability: an experimental study in sheep

  • Omed Ikram Shihab Department of Oral Maxillofacial Surgery, College of Dentistry, Hawler Medical University, Erbil, Iraq
  • Abduljaleel Azad Samad Department of Oral and Maxillofacial Surgery, College of Dentistry, Hawler Medical University, Erbil, Iraq.
  • Hozak Zahir Ali Department of Oral and Maxillofacial Surgery, College of Dentistry, Hawler Medical University, Erbil, Iraq.
  • Othman A. Omer Department of Oral and Maxillofacial Surgery, College of Dentistry, Hawler Medical University, Erbil, Iraq.
  • Ahmed A. Haider Department of Oral and Maxillofacial Surgery, College of Dentistry, Hawler Medical University, Erbil, Iraq.
Keywords: Dental implant, Osseointegration, Primary stability

Abstract

Background and objective: Primary implant stability is considered necessary for
achieving and maintaining osseointegration. This experimental study aimed to evaluate the
outcome of implants without primary stability, clinically and radiographically.
Methods: Two adult sheep (3-4 years of age), 70 kg in weight, were included in the study.
After sedation and local anesthesia, the lateral side of the basal bone of mandible is
exposed by a single long incision. The implant bed performed in the inferior border of the
basal bone of mandible drilling to 5 mm in diameter and 10 mm in length. Five implants
were inserted into the basal bone of mandible for each side (right and left), but the sizes of
inserted implant was 3.8 mm in diameter and 10 mm in length, after 4 months the 2 sheep
were sacrificed and the universal torque ratchet was used to measure the stability of the
implant by a counter torque 30 N/cm test. Cone Beam Tomography (CBCT) was used to
evaluate the implants radiographically.
Results: Nineteen (from 20) implants successfully tolerated a 30 N/cm countertorque test
comprising (95%). Only one implant failed to osseointegrate (5%). During the healing
period, no any adverse clinical signs reported.
Conclusion: Dental implants may have a chance to osseointegrate even in the lack of
primary stability.

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Published
2018-09-09
How to Cite
Shihab, O., Samad, A., Ali, H., Omer, O., & Haider, A. (2018). Osseointegration of dental implants without primary stability: an experimental study in sheep. Zanco Journal of Medical Sciences (Zanco J Med Sci), 21(1), 1616 - 1618. https://doi.org/10.15218/zjms.2017.011
Section
Original Articles