The combined effects of undersized drilling and implant macrogeometry on bone healing around dental implants: An experimental study

R. Jimbo, N. Tovar, R. B. Anchieta, L. S. MacHado, C. Marin, H. S. Teixeira, P. G. Coelho

Research output: Contribution to journalArticlepeer-review

Abstract

This study investigated the effect of undersized preparations with two different implant macrogeometries. There were four experimental groups: group 1, conical implant with an undersized osteotomy of 3.2mm; group 2, conical implant with an undersized osteotomy of 3.5mm; group 3, cylindrical implant with an undersized osteotomy of 3.2mm; group 4, cylindrical implant with an undersized osteotomy of 3.5mm. Implants were placed in one side of the sheep mandible (n =6). After 3 weeks, the same procedure was conducted on the other side; 3 weeks later, euthanasia was performed. All implants were 4mm×10mm. Insertion torque was recorded for all implants during implantation. Retrieved samples were subjected to histological sectioning and histomorphometry. Implants of groups 1 and 2 presented significantly higher insertion torque than those of groups 3 and 4 (P <0.001). No differences in bone-to-implant contact or bone area fraction occupied were observed between the groups at 3 weeks (P >0.24, and P >0.25, respectively), whereas significant differences were observed at 6 weeks between groups 1 and 2, and between groups 3 and 4 (P <0.01). Undersized drilling affected the biological establishment of bone formation around both dental implant macrogeometries.

Original languageEnglish (US)
Pages (from-to)1269-1275
Number of pages7
JournalInternational Journal of Oral and Maxillofacial Surgery
Volume43
Issue number10
DOIs
StatePublished - Oct 1 2014

Keywords

  • conical implants
  • cylindrical implants
  • undersized preparation

ASJC Scopus subject areas

  • Surgery
  • Oral Surgery
  • Otorhinolaryngology

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