A novel algorithmic approach for automatic virtual articulation to avoid dynamic interferences in dental restoration...

Area of Science:

• Dental prosthodontics
• Computer-aided design (CAD)
• Occlusal analysis

Background:

• Debate exists on the necessity of facebows and individual articulator settings in prosthodontics.
• Simpler methods are often compared against advanced techniques for fixed posterior restorations.

Purpose of the Study:

• To evaluate novel algorithmic articulator concepts as an alternative for avoiding dynamic interference contacts.
• To assess the impact of these concepts on the occlusal morphology of fixed posterior restorations.

Main Methods:

• Selected 50 patient cases (61 restorations) from a chairside CAD database.
• Applied static occlusion, average articulation, and full range dynamic articulation in CAD software.
• Compared dynamic contact points visually and metrically using monitoring software.

Main Results:

• Full range dynamic articulation significantly reduced dynamic interference contacts compared to static or average articulation (P < 0.001).
• Virtual grinding of interpenetrating contact points resulted in minimal morphologic changes to restoration surfaces.

Conclusions:

• Full range dynamic articulation is a viable method for designing fixed posterior restorations.
• This approach effectively avoids dynamic interference contacts without requiring patient-specific parameters.