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1. 128-Miniscrews and biomechanics
in orthodontics
2010
Contact: dr.aboualnaser@hotmail.com
Oussama SANDID (Paris-FR)
Awatef SHAAR (BAU-LB)
Mohamad ABOUALNASER (Connecticut-USA)
Oussama SANDID - Mohamad ABOUALNASER- Awatef SHAAR

2. 10-TADs-Biomechanics
RavindraNanda, Madhur Upadhyay,https://academic.oup.com/ejo/article/35/5/634/495624/Skeletal-and-dental-considerations-inorthodontic
Biomechanical design of the force system involved: (A) during en-masse retraction of the anterior
teeth with mini-implant anchorage. Here, F >> r > i. (B) After space closure. Note the increase in the
angulation of the total force relative to the occlusal plane. Here, F >> r ≈ i) (F, total force; I, intrusive
component; r,retractive component; M, moment on the anterior segment; m, moment on the entire
arch)
Awatef SHAAR , Mohamad ABOUALNASER , Oussama SANDID

3. • A) Illustration of the moment generated by both forces due to the
archwire torsion in the 6-mm hook group; B) Illustration of the moment
generated by the retraction force applied to the 6-mm hook group.
Antônio Carlosde OliveiraRuellas1 , Matheus MeloPithon2 , RogérioLacerdados Santos3http://www.scielo.br/pdf/dpjo/v18n2/a21v18n2.pdf
10 a-TADs-Biomechanics
Awatef SHAAR , Mohamad ABOUALNASER , Oussama SANDID

4. 10 b -TADs-Biomechanics
https://www.hindawi.com/journals/crid/2011/475638/fig1/
Awatef SHAAR , Mohamad ABOUALNASER , Oussama SANDID
• (a) Effect of space closure with conventional sliding mechanics without miniscrew. Anterior and posterior
segments rotate around CR of each segment, archwire forced to bend near rotation of entire arch. These
changes can easily be prevented with precurved archwires. (b) Retraction force from miniscrew anchorage
with continuous archwire produces rotation of entire arch aroundCres of dentition. (c) Rotation of anterior
segment around Cres of anteriorteeth.
Oussama SANDID - Mohamad ABOUALNASER- Awatef SHAAR

5. Intrusive force on posterior teeth causing posterior open bite and anterior deepbite.
https://www.hindawi.com/journals/crid/2011/475638/fig1/
10 c-TADs-Biomechanics
Awatef SHAAR , Mohamad ABOUALNASER , Oussama SANDID

6. (a) Right lateral views of biomechanics of space closure with MSPA. (c) Transverse view of
miniscrew biomechanics.
https://www.hindawi.com/journals/crid/2011/475638/fig1/
10 d -TADs-Biomechanics
Awatef SHAAR , Mohamad ABOUALNASER , Oussama SANDID

7. Biomechanics for the palatal root movement of the maxillary anterior teeth with microimplants
https://www.researchgate.net/figure/50363068_fig10_Fig-11-Biomechanics-for-the-palatal-root-movement-of-the-maxillary-anterior-teeth-with
10 e -TADs-Biomechanics
Awatef SHAAR , Mohamad ABOUALNASER , Oussama SANDID

8. 10 f-Miniscrews for upper incisor intrusion
• Force vectors for the intrusion of the six-tooth anterior segment (green
box). Black and white circles, miniscrew heads; red arrows, load
vectors.
• Types, Diameter, length, Angulation, Activation, duration…
https://synapse.koreamed.org/DOIx.php?id=10.4041/kjod.2016.46.5.310&vmode=PUBREADER
O SANDID
Awatef SHAAR , Mohamad ABOUALNASER , Oussama SANDID

9. • A. Denture preparation : An .022 × .028″ edgewise appliance is sequentially placed. .017 × .022″ maxillary
and .018 × .025″ mandibular archwires are inserted. Maxillary and mandibular posterior micro-implants,
and elasto‐ mers are applied to the canine brackets and mandibular archwire just mesial to omega stop
loop. B. End of denture preparation : The arches are leveled, the rotations are corrected, the canines have
been retracted,and the mandibular terminal molar has been tipped to an anchorage prepared position
10 g -TADs-Biomechanics
Awatef SHAAR , Mohamad ABOUALNASER , Oussama SANDID

10. • This is the combined intrusion and retraction force system suggested for the high angle
protrusion cases
Johnny Joung-Lin Liaw1, Daniel Wei-Yee Wang2, http://www.apospublications.com/article.asp?issn=2321
1407;year=2015;volume=5;issue=2;spage=56;epage=62;aulast=Liaw
10 h -TADs-Biomechanics
Awatef SHAAR , Mohamad ABOUALNASER , Oussama SANDID

11. 10 I -TADs-Biomechanics
Tae-Woo Kim
Awatef SHAAR , Mohamad ABOUALNASER , Oussama SANDID
• Openbite: 2 mini-implants from the buccal and palatal sides on one tooth will exert intruding
force without tipping.
• Midpalatal and 2 buccal mini-implants with TPA to intrude molars
•

12. • Illustration of the Class III mechanics employed in the vertical control, anchored
in mini-implants on the upper arch, between the first molars and second
premolars
Márcio Costa Sobral1 , Fernando A. L. Habib2 , Ana Carla de Souza Nascimento,http://www.scielo.br/pdf/dpjo/v18n2/a26v18n2.pdf
10 j -TADs-Biomechanics
Awatef SHAAR , Mohamad ABOUALNASER , Oussama SANDID

13. • The line of force applied from the miniscrew to the hook prewelded to the
archwire creates vertical components, favoring the correction of a deepoverbite.
http://pocketdentistry.com/chapter-2-miniscrews-and-biomechanics-in-orthodontics/
10 k -TADs-Biomechanics
Awatef SHAAR , Mohamad ABOUALNASER , Oussama SANDID

14. • The line of force action is parallel to the archwire, creating a resultant in the
same direction. This should be done in cases where the overbite is undercontrol
http://pocketdentistry.com/chapter-2-miniscrews-and-biomechanics-in-orthodontics/
10 L-TADs-Biomechanics
Awatef SHAAR , Mohamad ABOUALNASER , Oussama SANDID

15. 10 m-Palatal Mini-implant- Open bite
• - Mid-palatal Mini-implant
• - Expanded TPA
• - Expanded main archwire 19 x 25 SS with slight crown buccal torque.
• - Diameter 1,6mm , Length 6mm
Tae –WooKim
Oussama SANDID - Mohamad ABOUALNASER- Awatef SHAAR

16. • Burstone lingual arch with lingual crown torque + buccaly mini-implamts
• Diameter 1,6 mm Length 6mm
• Miniscrew Placement in Posterior Mandibular Sites: insertion angles of 45, 60, and 90 .
Tae-Woo kim ,
http://laboratorioceosa.com/cursos-de-ortodoncia/modulos/modulo-7-
biomecanica-avanzada-y-autoligado/mini-implantes-como-alternativa-de-anclaje/
10 n -TADs-Intrusion of lower molar- open bite
Awatef SHAAR ,Mohamad ABOUALNASER , Oussama SANDID

17. Intersting link