Online-Ortho Academy of Fixed Orthodontics for General Practioners

19/01/2019

Facial Aesthetics FELLOWSHIP Course by DR AMIT K GABA
Date: Starting by 27th Jan 2019 LUDHIANA PUNJAB
ASIAN DENTO FACIAL ESTHETIC CONTINUUM (ADFEC)
APPROVED BY EGYPTIAN ACCREDITATION COUNCIL announcing....

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🌟For detailed course videos, pictures and delegate testimonials, check our group Asian dentistry facial esthetic academy
The real patient hands on.

14/10/2017

few seats left

28/08/2017

Visit www.adfea.in

24/07/2016

Tips

08/07/2016

Impacted canine

ORTHODONTICS : Impacted Tooth Exposure & Uncovering For Orthodontics Directorio Odontológico, Infopaciente, Orthodontics, Videos of dentistry Although we often think of the third molars, or "wisdom teeth," when we think of impacted teeth, any of the permanent teeth can fail to erupt properly. This…

28/06/2016

Debonding steps...

15/06/2016

Nice way to treat class III

26/12/2015

Bio progressive appliance

03/10/2015

TADs

How to Place Mini Implant - Step by Step Instruction - 3M ESPE - Your Dental Supply http://www.yourdentalsupply.com

30/08/2015

Side effects

Biomechanical side-effects
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In many respects conventional fixed appliances often only exhibit subtle biomechanical side-effects such as frictional binding, tooth tipping and anchorage loss, because these effects are usually localised to single teeth or a group of several teeth. For example, traction applied at the coronal level (to a bracket) may result in tipping and poorly controlled bodily movement of that tooth. Since the adjunctive use of mini-implants provides more profound anchorage, active in all three dimensions and extrinsic to the fixed appliance, the side-effects may also be more strongly expressed and affect the entire arch (when continuous arch mechanics are utilised).

Two clear examples of this occur when oblique traction is applied directly from a mini-implant to retract a canine, using traction applied to the canine bracket on either a flexible or rigid archwire. The oblique vector of traction encourages the canine to tip distally causing either a flexible archwire to exhibit a ‘rollercoaster’ bowing phenomenon (Fig. 1.6a), or a rigid archwire to rotate the entire arch (around its centre of rotation) causing a combination of molar intrusion and incisor extrusion

Read more about fundamental orthodontic concepts at Prof John Mew`s new book of “The Cause & Cure of Malocclusion” at:
www.lsfo.co.uk/eshop/The_Cause_and_Cure_of_Malocclusion.php
Learn more about facial growth, malocclusion and its treatment by joining orthodontic-orthotropic course at:
www.lsfo.co.uk/diploma-in-orthotropics-orthotropics-six-months
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http://wiley-vch.e-bookshelf.de/products/reading-epub/product-id/792611/title/The%2BOrthodontic%2BMini-implant%2BClinical%2BHandbook.html?lang=dt
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30/08/2015

The roots of orthodontics.....

Direct and indirect anchorage
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Direct loading is when traction is applied from the mini-implant’s head to an appliance, typically with elastic chain or nickel titanium (NiTi) coil springs (Fig. 1.2a).
Indirect loading involves using the mini-implant to reinforce anchor teeth, from which traction is applied (Figs 1.2b,c). Whilst indirect anchorage avoids some potential biomechanical side-effects (as discussed in Chapter Three) it risks insidious anchorage loss through flexing of the intermediary wire and undetected tipping or bodily translation of the mini-implant. Consequently, I prefer to use direct anchorage wherever possible and this will be elucidated in the clinical scenario chapters.
Figure 1.2 (a) Direct anchorage where this grey elastomeric attachment provides traction from the mini-implant head to a powerarm on the fixed appliance for en masse retraction of the anterior teeth. (b) The maxillary mini-implant provides indirect anchorage for molar protraction in this hypodontia case. Horizontal traction is applied, using a NiTi coil spring, connected to a vertical auxiliary wire, which in turn is joined to both the main archwire (using a cross-tube attachment) and the mini-implant head (where its position is secured by composite resin). (c) Indirect anchorage of the upper incisors during unilateral molar protraction, using an elastomeric chain on the fixed appliance. This involves a 0.019 × 0.025 stainless steel auxiliary wire from the mid-palatal mini-implant’s head to the central incisors’ palatal surfaces, secured to both with composite resin.

Read more about fundamental orthodontic concepts at Prof John Mew`s new book of “The Cause & Cure of Malocclusion” at:
www.lsfo.co.uk/eshop/The_Cause_and_Cure_of_Malocclusion.php
Learn more about facial growth, malocclusion and its treatment by joining orthodontic-orthotropic course at:
www.lsfo.co.uk/three-days-online-orthotropics-orthotropics-course
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http://wiley-vch.e-bookshelf.de/products/reading-epub/product-id/792611/title/The%2BOrthodontic%2BMini-implant%2BClinical%2BHandbook.html?lang=dt
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www.orthotropics.com

24/07/2015

Force does matter.....

The alteration in the point of force application—labial or lingual could influence the magnitude of the moments in the sagittal plane.
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The experimental investigations of the initial force system produced by lingual appliances are scarce. Regarding the force magnitude, it is anticipated that an archwire of the same dimension and composition would exert higher forces at the anterior region if ligated lingually since the wire stiffness is increased (Moran, 1987). The bending stiffness of a beam is inversely proportional to the cube of length and the torsional stiffness is inversely proportional to length (Thurow, 1982). Moreover, the decrease in stiffness for bending is proportional to the cube of interbracket width increase (Creekmore, 1976). In the present experiment, the forces measured on the lateral incisor for the STb and Incognito brackets were 23 and 38per cent higher relative to conventional brackets, respectively. It is more difficult to apply light optimal forces with lingual brackets since the load/deflection rate is increased in comparison with conventional appliances (Moran, 1987; Geron et al., 2004). The difference between the two lingual systems could be attributed to the interaction of the ligation mode with the different slot designs. In case of the Incognito lingual brackets, the archwire was ligated with German overties, which provide maximum seating force, and the vertical walls of the slot provided additional stabilization to the archwire in the horizontal plane. The effect of the German overties onto the archwire stabilization is expected to be less pronounced in thinner archwires and minor tooth displacements since in these cases, the seating force for the wire is expected to be lower.

The moment created from a force applied lingually may produce a tooth movement much more complicated and unpredictable. Theoretically, the moments created from a horizontal force could be the same between the two bracket systems if force magnitude remains the same and if the vector of the force remains on the same horizontal plane and consequently on the same distance from the centre of resistance. This explains the similar patterns of tooth displacement at horizontal loadings observed between labial and lingual systems in a three-dimensional finite element model of an upper incisor (Jost-Brinkmann et al., 1993). In the present experimental set-up, the alteration in the point of force application, labial or lingual, and the differences in force magnitude have additive actions on the magnitude of the initial moments in the sagittal plane. As a result, these moments were higher in both lingual appliances (Figure 3). The difference in force magnitude between the two lingual appliances was not capable to establish a statistically significant difference between the moments measured from these appliances. This implies that the distance between the force vector and the centre of resistance in Incognito brackets was smaller in comparison to the STb brackets.

Read more about fundamental orthodontic concepts at Prof John Mew`s new book of “The Cause & Cure of Malocclusion” at:
www.lsfo.co.uk/eshop/The_Cause_and_Cure_of_Malocclusion.php
Learn more about facial growth, malocclusion and its treatment by joining orthodontic-orthotropic course at:
www.lsfo.co.uk/three-day-orthotropics-orthodontics-clinical-and-practice-course
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http://ejo.oxfordjournals.org/content/35/1/82
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www.orthotropics.com