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Full-Text Articles in Orthodontics and Orthodontology
A Study Of The Relationship Between Incisor Intrusion And Root Resorption, W. Michael Mcfadden
A Study Of The Relationship Between Incisor Intrusion And Root Resorption, W. Michael Mcfadden
Loma Linda University Electronic Theses, Dissertations & Projects
This study examined the relationship between maxillary and mandibular incisor intrusion and root resorption. Age, sex, facial type, treatment time, extraction versus non-extraction therapy, width of the symphysis, and the angle of the incisors to skeletal reference planes were also studied for their relationship to intrusion and root resorption. Thirty-eight cases treated with utility arches for intrusion were selected. Root shortening was found to average 1.84 mm for maxillary incisors and 0.61 mm for mandibular incisors. Intrusion of incisors in a population that exhibited growth was found to be one of "holding against growth". No relationship was found to exist …
A Non-Human Primate Model For Studying Corticotomy-Facilitated Orthodontic Tooth Movement, R. David Rynearson
A Non-Human Primate Model For Studying Corticotomy-Facilitated Orthodontic Tooth Movement, R. David Rynearson
Loma Linda University Electronic Theses, Dissertations & Projects
This study was undertaken to test the hypothesis that a corticotomised tooth moves as a tooth-bone unit when under orthodontic force. A non-human primate model was designed to test the hypothesis. The non-human primate selected was Macaca fasicularis. Three adult males with erupted third molars were chosen so that extrapolation could be made to the adult human. The methods employed included the following: 1) Each animal had one treatment quadrant and one control quadrant per arch; 2) Pre-op and post-op study models were made; 3) All 2nd premolars, 2nd molars, and 3rd molars were banded; 4) A full-thickness flap …