Multistepped Drill Design for Single-Stage Implant Site Preparation: Experimental Study in Type 2 Bone

Area of Science:

• Dental Implantology
• Biomaterials Engineering
• Surgical Instrumentation

Background:

• Single-stage implant site preparation is crucial for efficient dental implantology.
• Optimizing osteotomy procedures can enhance primary implant stability and reduce chair time.
• Thermal variations during drilling impact bone healing and implant success.

Purpose of the Study:

• To evaluate an experimental multistepped drill for single-stage implant site preparation.
• To analyze real-time thermal variations during and postdrilling.
• To assess the impact on implant stability.

Main Methods:

• Simulated osteotomy in type 2 bone similes using paired microprobe thermocouples for real-time temperature recording.
• Comparison of three drilling protocols: Control (incremental), Test A (3.3mm stepped), and Test B (4.1mm stepped).
• Implant stability evaluated using Perio Test Value (PTV).

Main Results:

• Multistepped drills induced comparable thermal changes to conventional methods, with no significant differences between groups.
• Drilling in cortical bone resulted in a significant temperature increase (1.8 ± 0.9°C) compared to cancellous bone.
• Test groups demonstrated significantly higher temperature increases (ΔT) but reduced drilling time by approximately 10 seconds.
• Implants in test groups showed significantly higher PTV values, indicating increased stability.

Conclusions:

• Multistepped drills for single-stage implant site preparation increase temperature compared to conventional incremental protocols.
• These drills induce greater temperature increments in cortical bone versus cancellous bone.
• Using a multistepped drill alone reduces drilling time.
• Multistepped drills can potentially double implant stability compared to conventional methods.