In vitro comparative study on the friction of stainless steel wires with and without Orthospeed® (JAL 90458) on an inclined plane.

BACKGROUND: During the treatment of orthodontics, in the mechanics of slide, there takes place friction, which they reduce the slide of the arch across bracket. Therefore, clinical there takes place an increase of the time of treatment. There are different the technologies that try to reduce this friction, as the self-ligating braces. The purpose of this study was to research the in vitro behavior of JAL 90458 as a buffering agent which reduces friction between brackets and stainless steel arch wires of different cross sections and sizes. MATERIAL AND METHODS: Three types of stainless steel wires with different cross sections and three types of ligatures were used with and without JAL 90458 to measure the friction according to the time and distance traveled by the brackets on an inclined plane with two angulations. The Kruskal-Wallis one-way analysis of variance by ranks was applied to determine the degree of friction between the group using and the group not using the product (P ≤ .05). RESULTS: Separate analysis of the arch wires, ligatures and angulation with and without the compound revealed statistically significant differences between the groups, showing that friction was reduced significantly when JAL 90458 was used (P ≤ .01). The 0.021x0.025" arch wires and the arch wires attached using elastic ligatures produce the least resistance to sliding among all of those analyzed when the product was not used (P ≤ .05). CONCLUSIONS: The results show that JAL 90458 reduces friction independently of arch wire cross section, type of ligature and angulation of the measuring instrument. KEY WORDS: Friction, JAL 90458, arch wires, ligatures, in vitro.

A new cephalometric diagnostic method for Down’s Syndrome patients with open bite

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Vertical cephalometric analysis is a new cephalometric diagnostic method, created and studied by the author, which allows us to identify objectively the dental and skeletal components found in certain types of open bites.Down’s Syndrome patients frequently have this type of malocclusion which produces a significant dysfunction of the whole stomatognathic system. The primary complication of the treatment lies in the difficulty of identifying exactly how much of an open bite is dental and how much is skeletal; indeed, it is precisely this extremely important factor where this diagnostic method will be useful. Only two indexes are needed. The first, called SOBI (skeletal open bite index), measures the skeletal component, while the DOBI (dental open bite index) measures the dental component. The quantitative value of both components will establish a diagnosis-prognosis for the patient

A new cephalometric diagnostic method for Down's Syndrome patients with open bite.

Vertical cephalometric analysis is a new cephalometric diagnostic method, created and studied by the author, which allows us to identify objectively the dental and skeletal components found in certain types of open bites. Down's Syndrome patients frequently have this type of malocclusion which produces a significant dysfunction of the whole stomatognathic system. The primary complication of the treatment lies in the difficulty of identifying exactly how much of an open bite is dental and how much is skeletal; indeed, it is precisely this extremely important factor where this diagnostic method will be useful. Only two indexes are needed. The first, called SOBI (skeletal open bite index), measures the skeletal component, while the DOBI (dental open bite index) measures the dental component. The quantitative value of both components will establish a diagnosis-prognosis for the patient.

A vertical cephalometric analysis.

Correctly assessing open-bite malocclusions has remained problematic because clinicians have not had entirely reliable methods of determining the exact amount of skeletal and dental contributions to the problem. A new cephalometric technique, the vertical cephalometric analysis, offers orthodontists a system that precisely identifies the percentage of skeletal and dentoalveolar components that open-bite patients have. The vertical cephalometric analysis offers a discriminating diagnostic method for evaluating, diagnosing, and treatment planning for patients with open bite. This technique will allow clinicians to classify patients with accuracy, as well as to establish prognoses and select therapies.