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International Journal of Oral Implantology
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Int J Oral Implantol 5 (2012), No. 4     28. Dec. 2012
Int J Oral Implantol 5 (2012), No. 4  (28.12.2012)

Page 333-342, PubMed:23304687


Immediate loading of single implants inserted flapless with medium or high insertion torque: a 6-month follow-up of a split-mouth randomised controlled trial
Cannizzaro, Gioacchino / Leone, Michele / Ferri, Vittorio / Viola, Paolo / Federico, Gelpi / Esposito, Marco
Purpose: To compare the outcome of immediately loaded single implants inserted with medium (from 25 to 35 Ncm) or high insertion torques (>80 Ncm).
Materials and methods: Fifty patients received two single non-adjacent implants, each randomly inserted flapless with a torque between 25 to 35 Ncm or >80 Ncm according to a split-mouth design. Non-occluding temporary crowns were immediately placed on provisional abutments and definitive crowns were delivered after 6 weeks. Patients were followed for 6 months after initial loading. Outcome measures were crown/implant failures, complications, peri-implant marginal bone level changes, postoperative pain and presence of peri-implant apical radiolucency.
Results: No drop-out occurred. Seven implants inserted with a torque between 25 to 35 Ncm failed versus none of the implants inserted with a torque >35 Ncm. With the exception of crown/implant failures (exact McNemar significance P = 0.0156, difference in proportions: -0.12; 95% CI -0.21 to -0.02) there were no statistically significant differences between groups for the other outcome measures.
Conclusions: It is preferable to insert single implants with a high insertion torque (>80 Ncm), to minimise early implant failures, when loading them immediately.

Keywords: dental implants, immediate loading, insertion torque, success