The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
HMCS Vancouver Pre-Deployment Brief - May 2024 (Web Version).pptx
Brackets in orthodontics /certified fixed orthodontic courses by Indian dental academy
1. INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandentalacademy.com
www.indiandentalacademy.com
2. What is a bracket???
www.indiandentalacademy.com
3. What is a bracket???
Bracket- an attachment that serves to deliver the
necessary tooth moving forces.
Bracket may be defined as an orthodontic attachment
secured to a tooth for the purpose of engaging an arch
wire - Thurow
www.indiandentalacademy.com
5. E.H ANGLE
Father of orthodontics
Valuable contributions
Latest – edgewise app
Angle’s line of occlusion
www.indiandentalacademy.com
6. E.H ANGLE
All you can do is push, pull or turn a tooth.
Edgewise appliance - ‘‘Latest and the best’’
Evolution of edgewise appliance….
www.indiandentalacademy.com
7. Evolution of edgewise appliance
Angle graduated in 1878
1888 – angle system
Standard Orthodontic appliance should have 5
properties
www.indiandentalacademy.com
9. Evolution of edgewise appliance
Angle patented the jackscrew – he gave the
credit for the regulating screw to dwinelle
1849- did not give credit to farrar who had
described a similar appliance in 1876 – his
rival.
www.indiandentalacademy.com
11. Evolution of edgewise appliance
1907 – angle discontinued the use of jack screws
E Arch
www.indiandentalacademy.com
12. Evolution of edgewise appliance
Heavy archwires supplied in 4 designs
Basic E arch
Ribbed E arch
E arch without threaded ends
E arch with hooks
www.indiandentalacademy.com
17. Evolution of edgewise appliance
Problems with Angle’s E arch appliance
1.
Removal of retention app – malocclusion.
Axial relationship of teeth can not be accomplished
Unstable results
2.
3.
Teeth should be moved bodily
www.indiandentalacademy.com
19. Evolution of edgewise appliance
Pin and tube-1910
Adv - root movement
Disadv – technique sensitive and time consuming
- rotational adjustments difficult to achieve
www.indiandentalacademy.com
20. Evolution of edgewise appliance
The Ribbon Arch-1915
Brackets
www.indiandentalacademy.com
21. Evolution of edgewise appliance
Advantages
Disadvantages
1.
Rotations readily
accomplished
Incisogingival
Labiolingual
1.
Enmasse movement of
teeth
Mesial and distal
tipping bends
2.
3.
2.
www.indiandentalacademy.com
22. Evolution of edgewise appliance
contrast to ribbon arch???
0.022×0.028
0.050 Inch wide
Gold bracket
Gold band
Ligature tie
www.indiandentalacademy.com
23. Evolution of edgewise appliance
Gold alloy archwires
First order bends
Second order bends
Third order bends
www.indiandentalacademy.com
24. Cornerstones of modern edgewise
orthodontics
Tooth movement in all 3 planes
Philosophy of treating to ideal arch form
Use of rectangular arch wires
www.indiandentalacademy.com
29. Curved base twin bracket
Positive control
Mechanism of action
www.indiandentalacademy.com
30. Twin bracket – important points
Rotational control : mainly by deflection of arch wire
Positive control
Disadvantages
1.
2.
3.
4.
10% play of arch wire
Inter bracket span is reduced Resiliency
Closing loop arch wires
Second order bends
www.indiandentalacademy.com
33. Lewis bracket
Advantages:
Does not interfere with resiliency ,closing
loops &second order bends
100% correction & over corrections
Wings though rigid can be bent
www.indiandentalacademy.com
34. Curved base lewis bracket
Increase contact with band .
Reduces trapping of the food.
www.indiandentalacademy.com
35. Vertical slot Lewis bracket
020 x020 vertical slot
www.indiandentalacademy.com
36. Steiner bracket
Flexible rotation arms - did not rely entirely on the
resiliency of archwire for tooth rotation.
Single width edgewise bracket
www.indiandentalacademy.com
37. Broussard bracket
Grayford broussard
Modified edgewise bracket
in which there is addition of
0.0185 x 0.046 slot –to
accept doubled 0.018
auxiliary wire
www.indiandentalacademy.com
38. Tweed-Merrifield appliance
Double width bracket on 6
anteriors
Intermediate Single width
brackets on Premolar
bands
Twin brackets on molars
0.022 tubes on second
molars
www.indiandentalacademy.com
39. Andrews straight wire appliance
BRACKETS stand in between tooth and the
orthodontist
1960 – concept of fully programmed appliance
Advantage of FPA
ELIMINATES WIRE BENDING
www.indiandentalacademy.com
40. Andrews
Driving force for FPA
1.
Analysis of orthodontically treated final occlusion
Analysis of naturally occurring optimal occlusion
Six keys to normal occlusion
2.
3.
www.indiandentalacademy.com
49. Andrews classification
1.
Non programmed appliance-a set of brackets
designed the same for all tooth types ,relying totally
on wire bending.
2.
Partly programmed appliance- a set of brackets
designed with some in built features ,but always
require some wire bending
3.
Fully programmed appliance- a set of brackets
designed to guide teeth directly to their goal
positions with unbent wires.
www.indiandentalacademy.com
51. Non programmed bracket
Angle’s edgewise app
FA point on FACC
All crowns will have equal facial prominences
Extensive Wire bending
www.indiandentalacademy.com
52. Non programmed bracket
Design shortcomings
1. Bracket base perpendicular to bracket stem.
2. Bracket bases are not contoured.
3. Slots are not angulated
4. Bracket stem are of equal faciolingual thickness.
5. Maxillary molar offset is not built in.
6. Bracket siting techniques are unsatisfactory.
www.indiandentalacademy.com
67. Non programmed bracket
Holdaway advocates that the bracket siting should
be altered according to the malocclusion.
Tweed recommends siting brackets in specified
number of millimeters from the incisal edge.
According to Jarabak bracket sites for inclination
should be determined by the shape of the crown.
www.indiandentalacademy.com
68. Non programmed bracket
Saltzman recommends except for the maxillary lateral
incisor ,brackets should be located in the middle third
of the crown.
Lindquist brackets according to the ht of marginal
ridges on posteriors.
www.indiandentalacademy.com