Abstract

Orthodontics is branch of dentistry which deals with dento-maxillary discrepancies. An Orthodontist deals with various developmental and/or developed dento-skeletal malocclusions. For dealing all type of developing malocclusion orthodontist opt preventive or interceptive approaches to restrict or minimize the dento-skeletal anomalies. For developed malocclusion the orthodontist has only corrective approach to correct it as much as possible. Growing patients has various developing discrepancies which may require intermediate prosthesis or devices for the correction. Specific characteristics of plastics will determine the realization of product at a high-quality level, with high technological performance and reliability. The plastics materials are produced on a polymer base by thermal polymerization or chemical polymerization. They are characterized by high mechanical strength, low density, high chemical stability, thermal insulation and electric insulation properties.

Keywords:Plastic devices; Plastic material; Dento-maxillary discrepancies; Aligner