Abstract
Space closure is one of the most challenging process in orthodontics and require a comprehension of biomechanics in order to avoid undesirable side effects. The versatility of Mini implants has increased its demand in respect of anchorage, minimizing reciprocal effects and reducing overall treatment duration. Bi-alveolar dental protrusion is one of the common malocclusion encountered by orthodontist and the most common treatment modality includes extraction of 4 first premolars followed by intrusion and retraction of maxillary anteriors to obtain ideal dental and soft tissue profile.Force application for longer duration can lead to orthodontic induced root resorption.Thus it is utmost important to study the amount of stress produced and pattern of stress distribution in PDL after force application. Thus with the help of FEM model stress evaluation was done during simultaneous intrusion and retraction of maxillary anteriors with the help of implants.
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