Mechanical Behaviour under Partial Adjustability in Articulator Systems

This manuscript investigates the mechanical behavior of articulator systems with partial adjustability, focusing on the introduction of internal adjustable parameters such as condylar inclination and Bennett movement. It does not address how adjustments should be performed, nor does it evaluate accuracy, correctness, or clinical relevance. The analysis is restricted to observable behavioral changes arising from altered constraint topology. Through controlled perturbation of individual parameters, the study demonstrates that partial adjustability does not reduce mechanical uncertainty but redistributes it. Behavioral shifts occur without corresponding geometric necessity, revealing the conditional status of stability, symmetry, and smoothness under parameter variation. This work functions as a standalone mechanical analysis and as an extension layer of the Articulators: Mechanical Behaviour and Geometrical Understanding corpus. It characterizes the mechanical consequences of introducing limited freedom into constraint-driven systems, without asserting simulation fidelity or interpretive prioritization.