Evaluation of variables associated with the transverse horizontal axis

Area of Science:

• Dental Mechanics
• Biomechanical Engineering
• Orthodontics

Background:

• Understanding maxillomandibular orientation is crucial in dental restorations and orthodontics.
• Laboratory articulators are used to simulate jaw movements and analyze dental relationships.
• Axis deviations can impact the accuracy of dental models and treatment outcomes.

Purpose of the Study:

• To investigate the effect of transverse horizontal axis deviations on maxillomandibular orientation.
• To quantify changes in vertical and horizontal orientation of maxillary and mandibular members.
• To develop a predictive model for anterior-posterior shifts due to axis deviations.

Main Methods:

• Utilized a laboratory articulator model with a 55 mm dimension.
• Evaluated twelve transverse horizontal axis deviations ranging from +30 mm to -30 mm.
• Performed three trials for each deviation group with standardized intermember mounting records.

Main Results:

• Significant changes in maxillomandibular orientation were observed across tested axis deviations.
• A linear regression analysis successfully modeled the relationship between axis deviation and anterior-posterior shift.
• The study generated a predictive equation for anterior-posterior shift based on transverse horizontal axis deviations.

Conclusions:

• Transverse horizontal axis deviations demonstrably affect maxillomandibular orientation in laboratory models.
• The developed predictive equation offers a tool for estimating anterior-posterior shifts.
• Findings are relevant for improving the accuracy of dental articulator simulations and orthodontic analyses.