The Clinical Performance of Narrow Diameter Implants Versus Regular Diameter Implants: A Meta-Analysis

Area of Science:

• Dental Implantology
• Biomaterials Science
• Clinical Dentistry

Background:

• Narrow diameter implants (NDIs) offer a less invasive alternative to regular diameter implants (RDIs).
• Assessing the clinical efficacy of NDIs compared to RDIs is crucial for treatment planning.
• Limited comparative data exists on their long-term performance and marginal bone loss.

Purpose of the Study:

• To compare the 1- and 3-year clinical performances of NDIs versus RDIs.
• To evaluate implant survival rates, prosthesis success rates, and marginal bone loss (MBL).
• To determine if implant diameter influences clinical outcomes.

Main Methods:

• Systematic literature search of electronic and manual databases (Jan 2000 - Apr 2018).
• Meta-regression analysis using a fixed-effects model.
• Inclusion of 11 studies with 1-year and 3-year follow-up data.

Main Results:

• Combined 1-year implant survival: 98.14% (NDIs) vs. 98.20% (RDIs).
• Combined 3-year implant survival: 98.71% (NDIs) vs. 98.84% (RDIs).
• No significant differences in survival, prosthesis success, or MBL between NDIs and RDIs at 1 and 3 years (P > .05).

Conclusions:

• Implant diameter does not significantly affect survival rates, prosthesis success, or MBL at 1 and 3 years.
• NDIs can be used effectively as an alternative to bone augmentation with RDIs in the short to medium term.
• Further high-quality randomized controlled trials with longer follow-up are recommended.