Insertion torque, resonance frequency, and removal torque analysis of microimplants.

Area of Science:

• Biomaterials Science
• Orthodontic Technology
• Dental Implantology

Background:

• Microimplants are crucial for orthodontic anchorage.
• Variations in microimplant design and material can influence stability.
• Objective mechanical testing is needed to compare performance.

Purpose of the Study:

• To compare insertion torque (IT), resonance frequency (RF), and removal torque (RT) of three different microimplant brands.
• To evaluate the impact of material (titanium alloy vs. stainless steel) and dimensions (length) on microimplant stability.
• To determine if microimplant characteristics correlate with mechanical stability metrics.

Main Methods:

• Thirty microimplants (Type A, B, C) with varying materials and dimensions were tested.
• Microimplants were inserted into synthetic bone without predrilling to a 7 mm depth.
• IT, RF, and RT were measured in vertical and horizontal directions using ANOVA and Spearman's correlation tests.

Main Results:

• Type C (titanium alloy, 9mm) and Type B (stainless steel, 8mm) exhibited significantly higher vertical IT and RT than Type A (titanium alloy, 8mm).
• Vertical RF was significantly higher for Type C and Type A compared to Type B.
• Type C showed significantly higher horizontal IT and RT compared to Type A.

Conclusions:

• Microimplant design (length, diameter ratio) and material influence mechanical stability (IT, RT, RF).
• Type A's design resulted in lower IT and higher RF, suggesting different stability characteristics.
• No significant correlations were found between IT, RF, and RT across the tested microimplant groups.