[The Procuste superimpositions: its value in the study of typology and its development during Edgewise Tweed-Merrifield treatment].
By transforming all figures into the same size, the Procruste mathematical superimpositions system allows orthodontists to analyze and compare geometric shapes whose different areas and forms would otherwise have made comparison impossible. Procruste is, accordingly, particularly useful in the study of facial types. In this retrospective study we analyzed the effects exerted by both growth and Edgewise Tweed Merrifield treatment upon changes in patients' typology of three different facial types. One hundred patients with Class II dental malocclusions were divided into three groups of deep bite, normal bite, and open bite. We found no significant statistical difference in the effects of treatment and of growth on modification of "form" of the facial skeleton as seen on profile cephalograms of the three categories. Patients in all the groups showed an average anterior rotation of the mandible.
Simon
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yohann.simon2@libertysurf.fr
D000293:Adolescent; D000367:Age Factors; D002508:Cephalometry / Q000379:methods* / Q000706:statistics & numerical data; D002648:Child; D005147:Facial Bones / Q000254:growth & development / Q000473:pathology*; D005500:Follow-Up Studies; D006801:Humans; D008312:Malocclusion, Angle Class II / Q000145:classification / Q000503:physiopathology / Q000628:therapy; D008445:Maxillofacial Development; D008954:Models, Biological; D024343:Open Bite / Q000503:physiopathology / Q000628:therapy; D012189:Retrospective Studies; D012399:Rotation; D013997:Time Factors; D014087:Tooth Movement Techniques / Q000379:methods*