Abstract
Statement of problem
A consensus on the clinical performance in dental implants placed with different insertion
torques is lacking.
Purpose
The purpose of this systematic review and meta-analysis was to evaluate the effect
of high insertion torque compared with regular or low torques during dental implant
placement in terms of implant survival rate and marginal bone loss.
Material and methods
Two independent reviewers searched electronic databases for studies published until
April 2019. The population, intervention, comparison, outcome (PICO) question was
“Do patients who receive implants with a high torque (equal or higher than 50 Ncm)
show similar implant survival rates and marginal bone loss as compared with those
who receive implants with a regular or low torque (less than 50 Ncm)?”. The meta-analysis
was based on the Mantel-Haenszel (MH) and the inverse variance (IV) methods (α=.05).
Results
The search yielded 6 articles, which included 389 patients (mean age: 55.28 years)
who had received 651 dental implants (437 with high torque and 214 with low or regular
torque). Most studies evaluated delayed loading, except 1 study that evaluated immediate
implant loading (n=50 for each group). Low or regular insertion torque had a high
failure rate (4.2%) compared with high insertion torque (1.1%), chiefly because of
immediate loading. However, the meta-analysis indicated no significant difference
between high- and regular- or low-torque implant placement in implant survival rate
(P=.52, risk ratio [RR]: 0.51, 95% confidence interval [CI]: 0.06-4.06) and marginal
bone loss (P=.30, mean difference [MD]: 0.15, 95% CI: -0.14 to 0.44).
Conclusions
A high insertion torque during implant placement does not affect implant survival
rate or marginal bone loss. However, further research is recommended to reassess this
clinical performance.
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Article info
Publication history
Published online: September 08, 2020
Identification
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© 2020 by the Editorial Council for The Journal of Prosthetic Dentistry.
