Editorial – Dr. Alberto Mazzocchi (VJO associate editor)
Orthodontics is the epitome of constantly changing Science, with new materials and new theories being proposed every day. Sometimes genial ideas are rejected because they are “too new” or because they differ from traditional concepts.
Let’s remember what happened when C. Tweed presented his extraction cases to the orthodontic community for the first time. He was considered a fool and a visionary, who distorted the teachings of E. Angle. Today, Tweed’s theory is considered a step forward in the progress of modern Orthodontics. An important lesson on what happens when society holds on to its old convictions and cannot adapt to change comes from Robin Dunbar’s The Trouble with Science, a book which I strongly recommend. In the last decades of the tenth century, when the Vikings colonized Greenland……
(by JIOS 30, 4, 1997)
Kazunori Yamaguchi, DDS , PhD
Yuko Morimoto, DDS, PhD
Ram S. Nanda DDS, MS, PhD
Kazuo Tanne, DDS , PhD
Abstract: There seems to be a general consensus that both static and functional lip pressures are important factors affecting the stability of occlusion. Patients with incompetent lips hold the lips apart at rest and show an excessive activity of the lower lip when holding the lips in contact. Therefore, the lip incompetence should be treated to retain the corrected dentition after orthodontic or orthognathic treatment. However, there are two questions; whether lip competence can be identified at an initial examination and whether it can be improved by treatment. We have to get an answer to the first question before getting down to the second one.
Alberto R. Mazzocchi MD, DDS
Abstract: Ectopic eruption and impaction of canines is a frequently encountered clinical problem. The incidence of impaction ranges between 1% and 3%. Canine impaction can be the result of localized factor(s) or polygenic multifactorial inheritance in association with other dental anomalies. There are a number of possible sequelae to canine impaction, ranging from loss of space in the arch to resorption of the roots of the adjacent teeth. Although the management of the ectopically erupting teeth necessitates the combined expertise of a number of clinicians, the orthodontist should have the primary responsibility of coordinating these efforts to provide the patient with the optimal treatment options and the most stable and favorable outcome. Advances in bonding techniques and materials allow for reliable bracket placement on ectopically positioned teeth. The aim of this study is to present some clinical uses of the Transbond MIP primer (3M Unitek), a new product designed for bonding in a wet field.
Correlations between morphologic palatal dimensions and the cranio-facial balance (English – Italian – Spanish)
Beatrice Cioni DDS
Abstract: The relationship between occlusion and cranio-facial morphology represents an often-discussed argument in orthodontics. Attempts have been made to correlate the shape and dimension of the dental arches with different facial patterns. The researcher’s goal is to evaluate the reciprocal relationships of the two dental arches and the cranial base, pointing out the influence of oro-facial muscles in the development of normal dental arches and malocclusions. There have been a number of papers published on this subject. Considering the oral cavity as a complete and complex organ for different vital functions, the roof of this cavity represents a connection between occlusion and craniofacial morphology in an individual. Our research aims to evaluate palatal morphology not as a single value, but as a sum of different elements (skeletal, muscular and functional) essential for harmonic development of the lower 2/3rds of the face.
(According to McLaughlin-Bennet -Trevisi)
Arturo Fortini MD,DDS
Massimo Lupoli MD,DDS
Umberto Montecorboli MD, DDS