Finite Element Method (FEM) Analysis of Dentoskeletal Changes on Temporary Anchorage Device (TAD)-Assisted Mandibular...

Area of Science:

• Orthodontics and Dentofacial Orthopedics
• Biomechanical Engineering
• Craniofacial Biology

Background:

• Temporary Anchorage Devices (TADs) improve fixed functional appliance (FFA) efficiency for malocclusion treatment.
• TADs offer stable anchorage, enhancing skeletal and dental corrections.
• They prevent common FFA side effects like incisor proclination and molar distalization.

Purpose of the Study:

• To analyze displacement and stress patterns in craniofacial structures and dentition.
• To evaluate the effects of conjoined implants and intermaxillary elastics for growth modification.
• Focus on growing Class II patients undergoing orthodontic treatment.

Main Methods:

• Finite element analysis using cone-beam computed tomography data.
• 3D modeling and assembly of mini-implants and miniplates.
• Application of orthopedic force via Class II elastics to simulate treatment.

Main Results:

• Highest stress observed on the mandibular ramus and lateral to the nasal aperture in the maxilla.
• Significant stress concentrations posterior to the glenoid fossa.
• Mandible displaced anteroinferiorly; maxilla displaced posterosuperiorly; dental movements included maxillary expansion and mandibular anterior displacement.

Conclusions:

• Class II elastics with TADs generate greater stress and displacement in skeletal structures than in dentition.
• This combined approach favors substantial skeletal changes over dental alterations.
• Effective for growth modification in Class II malocclusions.