Insertion Torque Value and Implant Stability Quotient: Separate Evaluation and Correlation for Different Clinical...

Area of Science:

• Dental Implantology
• Biomaterials Science
• Surgical Outcomes Research

Background:

• Assessing initial implant stability is crucial for successful osseointegration and long-term implant survival.
• Insertion Torque Value (ITV) and Implant Stability Quotient (ISQ) are two common methods for evaluating initial implant stability.
• Understanding the influence of clinical variables on these stability measures and their interrelationship is essential for optimizing implant placement.

Purpose of the Study:

• To investigate the impact of various clinical conditions on initial implant stability, assessed by ITV and ISQ.
• To determine the overall correlation between ITV and ISQ.
• To examine if this correlation is consistent across different clinical variables.

Main Methods:

• Initial implant stability was measured using both Insertion Torque Value (ITV) and Implant Stability Quotient (ISQ).
• Clinical variables included gender, age, arch, location, implant geometry, diameter, length, and immediate implantation.
• Statistical analyses employed Mann-Whitney-Wilcoxon, Kruskal-Wallis, and Spearman rank correlation tests.

Main Results:

• Mandible, short implants, and delayed implantation showed higher ITVs.
• Higher ISQ measurements were observed in the mandible, younger patients, specific diameters (3.75 and 4.3 mm), and delayed implantation.
• A strong overall correlation (rho = 0.541) between ITV and ISQ was found for ITVs up to 40 Ncm, which varied with clinical conditions.

Conclusions:

• Clinical factors such as arch, implant dimensions, patient age, and implantation timing influence both ITV and ISQ.
• A significant correlation between ITV and ISQ exists for ITVs ≤ 40 Ncm.
• This correlation is maintained across several, but not all, studied clinical conditions.