[All-on-4 occlusion study: using T-Scan Ⅲ occlusal analysis system].

Area of Science:

• Dental Implantology
• Biomechanical Engineering
• Prosthodontics

Background:

• All-on-4 rehabilitation offers a fixed full-arch solution for edentulous patients.
• Understanding occlusal force distribution is crucial for long-term implant success and patient comfort.
• Previous studies have not fully characterized occlusal dynamics across different positions in All-on-4 patients.

Purpose of the Study:

• To analyze occlusal force distribution in All-on-4 patients.
• To evaluate occlusion time characteristics at various positions.
• To utilize the T-Scan III occlusal analysis system for precise measurements.

Main Methods:

• Thirteen volunteers with All-on-4 rehabilitation participated.
• The T-Scan III system recorded occlusal forces and timing.
• Data collected at intercuspal, protrusive, and lateral excursive positions.

Main Results:

• At maximum intercuspation, premolar and anterior implant areas bore the majority of occlusal forces (64.0±6.7%).
• Protrusive forces concentrated significantly in the anterior region (11, 12, 21, 22) (90.4±27.7%).
• Lateral occlusal patterns exhibited considerable variability, with mixed single-tooth and group function observed.

Conclusions:

• Implant areas, particularly premolar and anterior regions, act as occlusal force centers in maximum intercuspation.
• Anterior implant regions are primary force recipients during protrusion.
• The diverse nature of lateral occlusal patterns necessitates individualized treatment considerations for All-on-4 restorations.