Fig. 2

Finite element model. A The teeth-aligner model consisted of periodontal ligament, crown and roots of the teeth, attachments, clear aligners, buttons and AMS. B The cranium-maxilla-mandible-TMJ model consisted of cranial bones, maxillae, mandible, articular discs, retrodiscal elastic stratum and masticatory muscles. C Detailed view of the TMJ area: condyle (blue), articular disc (yellow), retrodiscal elastic stratum (orange) and glenoid fossa (purple). D Masticatory muscle consisted of the deep part of masseter (DM), superficial part of masseter (SM), medial pterygoid muscle (MP), superior head of lateral pterygoid muscle (SLP), inferior head of lateral pterygoid muscle (ILP), anterior part of temporalis (AT), posterior part of temporalis (PT)