Change in Mandibular Incisor Facial Bone Height and Thickness Following Class II Correction with a Compressed Coil Spring Appliance
Abstract
Perhaps not since the advent of the roentgenogram by Wilhelm Conrad Rntgen in 1895 has the innovation of a new technology held the potential to alter orthodontic perceptions and practice so much. Cone beam computed tomography (CBCT) is opening never available before perspectives into diagnosis, treatment planning, and evaluation of treatment results. In many cases what is being found by orthodontists on 3-dimensional cone beam images are surprising and unexpected, and in some cases those findings bring into question current beliefs about proper practice. Dr. Charles Tweed based much of his diagnostic work and treatment goals on evaluations of a 2-dimensional lateral cephalometric radiograph and a point of central interest was the lower incisors relative to the mandibular plane. The key tenant that has been adhered to by orthodontists everywhere in the decades since has been that lower incisors must be upright over basal bone. Great discussion, mechanical effort, and appliance designs have occurred in efforts to prevent lower incisor proclination based on this fundamental convention.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2019
- Accession Number
- AD1127800
Entities
People
- Daniel P. Chartrand