History Of Orthodontics

3,246 views 124 slides Feb 09, 2021
Slide 1
Slide 1 of 124
Slide 1
1
Slide 2
2
Slide 3
3
Slide 4
4
Slide 5
5
Slide 6
6
Slide 7
7
Slide 8
8
Slide 9
9
Slide 10
10
Slide 11
11
Slide 12
12
Slide 13
13
Slide 14
14
Slide 15
15
Slide 16
16
Slide 17
17
Slide 18
18
Slide 19
19
Slide 20
20
Slide 21
21
Slide 22
22
Slide 23
23
Slide 24
24
Slide 25
25
Slide 26
26
Slide 27
27
Slide 28
28
Slide 29
29
Slide 30
30
Slide 31
31
Slide 32
32
Slide 33
33
Slide 34
34
Slide 35
35
Slide 36
36
Slide 37
37
Slide 38
38
Slide 39
39
Slide 40
40
Slide 41
41
Slide 42
42
Slide 43
43
Slide 44
44
Slide 45
45
Slide 46
46
Slide 47
47
Slide 48
48
Slide 49
49
Slide 50
50
Slide 51
51
Slide 52
52
Slide 53
53
Slide 54
54
Slide 55
55
Slide 56
56
Slide 57
57
Slide 58
58
Slide 59
59
Slide 60
60
Slide 61
61
Slide 62
62
Slide 63
63
Slide 64
64
Slide 65
65
Slide 66
66
Slide 67
67
Slide 68
68
Slide 69
69
Slide 70
70
Slide 71
71
Slide 72
72
Slide 73
73
Slide 74
74
Slide 75
75
Slide 76
76
Slide 77
77
Slide 78
78
Slide 79
79
Slide 80
80
Slide 81
81
Slide 82
82
Slide 83
83
Slide 84
84
Slide 85
85
Slide 86
86
Slide 87
87
Slide 88
88
Slide 89
89
Slide 90
90
Slide 91
91
Slide 92
92
Slide 93
93
Slide 94
94
Slide 95
95
Slide 96
96
Slide 97
97
Slide 98
98
Slide 99
99
Slide 100
100
Slide 101
101
Slide 102
102
Slide 103
103
Slide 104
104
Slide 105
105
Slide 106
106
Slide 107
107
Slide 108
108
Slide 109
109
Slide 110
110
Slide 111
111
Slide 112
112
Slide 113
113
Slide 114
114
Slide 115
115
Slide 116
116
Slide 117
117
Slide 118
118
Slide 119
119
Slide 120
120
Slide 121
121
Slide 122
122
Slide 123
123
Slide 124
124

About This Presentation

History Of Orthodontics


Slide Content

History of orthodontics -By Dr.Sumayya Shaikh 1 st year MDS Department of Orthodontics and Dentofacial Orthopaedics.

WHY STUDY HISTORY?

Introduction to Orthodontics

Evolution of the term ‘ ORTHODONTICS’

Definition of Orthodontics NOYES – 1911 First definition - “The study of the relation of the teeth to the development of the face, and the correction of arrested and perverted development.”

THE BRITISH SOCIETY FOR THE STUDY OF ORTHODONTICS – 1922 - “Orthodontics includes the study of the growth and development of jaws and face particularly, and the body generally, as influencing the position of the teeth; the study of action and reaction of internal and external influences on the development, and the prevention and correction of arrested and perverted development.” 

THE AMERICAN BOARD OF ORTHODONTICS (ABO) AND THE AMERICAN ASSOCIATION OF ORTHODONTISTS(AAO) -“Orthodontics is that specific area of dental practice that has as its responsibility,the study and supervision of growth and development of the dentition and the related anatomical structures from birth to dental maturity,including all preventive and corrective procedures of dental irregularities,requiring the repositioning of teeth by functional or mechanical means to establish normal occlusion and pleasing facial contours.”

Ancient Civilization Specimens dating back to the eight century BC indicate that Etruscans may have been the first people to employ orthodontics to improve tooth alignment.

Crude appliances to regulate teeth-recovered among the archaelogical remanants in Egypt,Greece and Mexico. First dental healers were physicians. Learned by trial,error and observations.

Sacerdotal Medicine

HIPPOCRATES (460-377 BC) Father of Medicine. First to separate medicine from fancy. ‘ Corpus Hippocraticum ’ – includes descriptions on irregularity and crowding of teeth.

ARISTOTLE (384-322 BC) Greek philosopher Compared various dentitions of different species of animals in his work ‘De Partibus Animalia ’ or “On the Parts of Animals.”

GALEN Anatomist Classified teeth as bones; said they were unlike other bones. First to recognize nerves (dental pulp) in the teeth.

ANDREAS VESALIUS Anatomist. Dared to correct the errors in Galen’s work. Gave a much more accurate description of the anatomy of teeth.

Aulius Cornelius Celsus (25 BC–50 AD) Use of finger pressure for the treatment of incorrectly positioned teeth - ‘De Re Medicinia .’ “If a second tooth should happen to grow in children before the first has fallen out, that which ought to be shed, is to be drawn out and the new one daily pushed towards its place by means of the finger until it arrives at its just proportion.”

Pliny the Elder (23 AD-79 AD) Advocated the first mechanical treatment of malaligned teeth by filing elongated teeth.

RENAISSANCE PERIOD (14 th – 16 th Century) Leonardo da Vinci (1452-1519) First artist to dissect human body for anatomic knowledge. Drew accurate pictures of these dissections First to recognize tooth form and relationship of each tooth to another tooth and to the opposing jaw. Described maxillary and frontal sinuses.

Leonardo Da Vinci's depiction of a skull.

Andreas Vesalius (1514-1564 ) Described minute anatomy of teeth , particularly the dental follicle and eruption pattern of teeth in his book ‘ De Corpori Humanis Fabrica ’

Ambroise Pare (1517-1590) First to use obturator for treatment of cleft palate.

Gabrile Fallopio (1523-1562) An Italian anatomist “ Observationes Anatomica ” A detailed description of dental follicle Wrote the terms hard and soft palate.

Bartholomaeus Eustachio(1520-1574) An italian anatomist Libellus de Dentibus (Book on the teeth) in 1563.

“ARZEI BUCHLEIN”(A Book of the Surgical Art) published in 1530 AD(author unknown). “When the teeth begin to drop out…push the new one every day toward that place where the first one was until it sits there and fits among the others.”

EIGHTEENTH CENTURY

World Leader in dentistry

Pierre Fauchard (1678-1761) ‘ Founder of Modern Dentistry’

1728- Le Chirurgien Dentiste (The Surgeon Dentist, A Treatise on the Teeth)- First complete scientific description of dentistry. Pioneer of Dental Prosthesis Introduced fillings for cavities BANDEAU- An expansion arch that became the basis for Angle’s E-arch. Used “pelican” forceps for repositioning of teeth. BANDEAU PELICAN FORCEP

Etienne Bourdet (1722-1789) Refined Fauchard’s Bandeau First to recommend serial extraction (1757) and premolars extraction. First to practise “lingual orthodontics,” expanding the arch lingually .

John Hunter (1728- 1793) English anatomist and surgeon First to describe normal occlusion Established difference between teeth and bone First to describe the growth of jaws

NINETEENTH CENTURY

Early Nineteenth Century Joseph Fox (1814) - First English dental textbook- The Natural History and Diseases of the Human Teeth. First to classify malocclusion. First to give directions for correcting irregularities of teeth. Le Foulon - First to use the term ORTHODONTIA James Murray- Coined the term ORTHODONTICS Delabarre (1819)- Introduced the crib. Separated crowded teeth by means of wooden wedges placed between teeth. J. M. Alexis Schange (1841)- Published the first work confined to orthodontics Coined the term ‘anchorage’ Kneisel (1836)- FIRST to use plaster models to record malocclusion. FIRST to use a removable appliance. FIRST introduced modern impression trays Joseph Sigmond (1825)- Recognised habit as factor in Malocclusion William Imrie (1834)- Thumb sucking as cause of dental abnormalities Rodrigues (1839)- Abnormal muscle pressure causes malocclusion

Year Author Contribution to Orthodontics 1840 JS Gunnell Introduced chin strap. 1841 William Lintott Introduced the use of screws. 1860 Emerson C Angel Introduced arch expansion by opening midpalatal suture “Father of expansion appliances ” 1871 William and Magill Developed molar bands. 1888 and 1889 John Nutting Farrar “Father of American Orthodontics ” Wrote “irregularities of teeth and their correction ” first exclusive textbook devoted to orthodontics. 1829 to 1913 Norman N Kingsley “Treatise on oral deformities ” worked on correction of cleft palate Extraoral traction 1893 Henry A Baker Bakers anchorage( intermaxillary elastics)

Orthodontics In United States

Chapin Harris (1806-1860) Editor- American Journal of Dental Science. Gave attention to orthodontics. Founded BALTIMORE COLLEGE OF DENTAL SURGERY in 1840- FIRST dental college.

John Nutting Farrar (1839-1913) Father of American Orthodontics Published series of articles in Dental Cosmos between 1881-1887 stating “The principle that in regulating teeth traction must be intermittent and not exceed fixed limits” 1876- He published FIRST paper about movement of teeth in dentistry. Originator of theory of intermittent force and FIRST to recommend root or bodily movement.

Norman Kingsley (1829-1913) FATHER OF ORTHODONTICS Among the first to use extraoral force to correct protruding teeth Introduced the term ‘Bite Plane.’ Designed fixed and removable inclined planes to correct Class II Malocclusion. Also, designed first soft-rubber palatal obturators “ A Treatise on Oral Deformities as a Branch of Mechanical Surgery ”- First truly comprehensive Textbook about orthodontic problems and treatments. Wrote over 100 articles on Cleft Lip and Palate Rehabilitation

Henry Baker (1893) Bakers Anchorage ( Intermaxillary elastics with rubber bands)

Eugene Talbot Stressed that key to treatment was to study and understand causes of malocclusion. FIRST to recommend surgical exposure of canines. FIRST to state endocrine glands as agents in development of malocclusion FIRST to use X-Rays for orthodontic diagnosis. One of the EARLIEST attempts in analysis of casts for measurement of jaws.

W.G.A Bonwill Bonwill Equilateral Triangle His measurements (2000 cases) showed distance from one condylar process to another is 4 inches and that to the incisors is also 4 inches Used this in orthodontic treatment

TWENTIETH CENTURY MODERN ORTHODONTICS

EDWARD HARTLEY ANGLE (1855-1930) FATHER OF MODERN ORTHODONTICS FIRST to limit his practice to orthodontics Paved way for Orthodontics to be recognised as a specialty.

1887 - At the Ninth International Medical Congress in Washington, DC, called for the separation of orthodontics from dentistry . 1899 - Angle’s Classification of Malocclusion published in Dental Cosmos. 1900 – Founded the first postgraduate school of orthodontics (Angle School of Orthodontia). 1907 - Founded the first orthodontic journal , The American Orthodontist .

Angles classification of Malocclusion

E (expansion) Arch Appliance  (1907) Pin & Tube Appliance  (1910)

Ribbon Arch Appliance  (1915) Edgewise Appliance  (1925)

Calvin Case (1847-1923) Did extensive work on Cleft Lip and Palate Known to have developed Vellum Obturator which allowed wearer to speak clearly Developed a classification of malocclusion (26) divisions) Advocated EXTRACTION of teeth He developed a technique for root movement. Introduced rubber elastics. Pioneered the use of retainers and was the FIRST to use thinner, resilient wires for tooth movement.

C ASE - A NGLE CONT R OVERSY VS

TO EXTRACT OR NOT TO EXTRACT ?

EXTRACTION v/s NON-EXTRACTION In 1911, at the Annual meeting of ADA, the GREAT EXTRACTION DEBATE took place between Angle’s student Dewey and Case. Angle’s proposal and Beliefs- Ideal facial esthetics would result when the teeth are placed in ideal occlusion. He believed this can be achieved when the dental arches are expanded so that all the teeth were in ideal occlusion.

Calvin Case Argued that although the arches could always be expanded so that the teeth could be placed in alignment, neither esthetics nor stability would be satisfactory in the long term for many patients. The Result Angle followers won- Extraction as treatment modality reduced greatly between World War I & II.

From 1930s to 1970s Charles Tweed Re-treated the relapse cases with extraction that were previously treated with non- extraction methodology and found occlusion to be more stable. Late 1940s Extraction reintroduced widely

Dr Martin Dewey (1881-1933) Champion of Non-Extraction Founding Editor of International Journal Of Orthodontia Editor for 17 years In 1911, established Dewey School of Orthodontics in Kansas City, Missouri 1931- President of ADA

George Ainsworth (1904) – Patented regulating appliance that used vertical tubes and principle of loop wires. Victor Jackson (1850-1929)- Designed JACKSON CRIB,which incorporated finger springs.

Charles Hawley (1861-1929)- Used celluloid sheet containing a geometric figure that when adapted to a model determined extent of proposed tooth movement Introduced Hawley’s Retainer.

Benno Lischer (1876-1959)- Founded International School Of Orthodontics(1907) Advocated Early Treatment. Introduced terms ‘ neutro -occlusion’, ‘ mesio -o cclusion , ‘ disto -occlusion.’

Albin Oppenheim(1911)- Serious study of tissue changes during orthodontic treatment Alfred Rogers(1873-1959)- Introduced concept of myofunctional therapy (1918) John V. Mershon (1867-1953)- Introduced removable lingual arch Albert Ketcham (1870-1935)- Founded American Board of Orthodontics President- American Society of Orthodontics(1929). Milo Hellman(1873-1947)- Introduced classification of dental development and craniofacial measurement Pioneered use of HAND and Wrist X-rays to determine growth age and status for patients Coined the term DIVERGENCE OF FACE

Thomas Graber 20 textbooks 22 chapters in other textbooks 180 publications in journals 930 book and journal abstract reviews 1915- International Journal of Orthodontia and Oral Surgery began publication

1920s Open tube appliance- James McCoy (1922) Removable appliance with spring- George Crozat (1928) Universal appliance- Spencer Atkinson (combination of ribbon arch and edgewise) Introduction of stainless steel to appliance fabrication- Lucien de Coster

CEPHALOMETRICS Pacini (1922)- Introduced method for standardised head radiography. Hofrath (1931)- Introduced standardised cephalometric technique using high-powered X-ray Machine and head holder called CEPHALOSTAT.

Holly Broadbent (1931) His article A New X-ray Technique and its Application to Orthodontics was the introduction to the specialty and to dentistry of Cephalometric Roentgenography andCephalometric Tracing; Devised CEPHALOMETER. William Downs(1899-1966 )- Introduced cephalometric analysis Wendell Wylie – Assessment of anteroposterior dysplasia

Wilton Krogman (1903-1987)- Applied principles of anthropology to dentofacial complex with Craniometry and Cephalometry . Allan Brodie - Contributed to study of growth patterns of human head. Weinmann and Sicher - Sutural theory of growth control. Joseph Jarabak - Introduced Jarabak Cephalometric Analysis.

Charles Tweed (1895-1970) Student of Dr. Angle in Pasadena. Chosen by Dr. Angle in preparing Edgewise bracket for introduction and manufacture Returned to Phoenix to set up FIRST pure edgewise specialty practice in U.S Initially treated patients without extraction, but was discouraged by results In 1940, treated 100 patients without extraction and when treatment failed, he treated them with extraction for no additional fee. Angle gave orthodontics the edgewise bracket, but Tweed gave orthodontists a way to use it. Under his leadership, extraction was reintroduced in 1940-50s to enhance facial esthetics and occlusal relationships.

William Wilding- Patent for use of alginate as impression material. H.D Kesling - Introduced philosophy of tooth movement by using rubber tooth positioning device in which teeth were moved into ideal cuspid relationship after completion of major occlusion.

ALLOYS IN ORTHODONTICS

Upto 1940- Wrought gold alloys as arch wires 1903- 1921- Brearly , Beckett, Strauss, Maurer shared honors for development of stainless steel 1940s- Austenitic Stainless Steel- Robert Austen 1950s- Type 300 series of stainless steel alloys most used Martensitic Stainless Steel- Adolf Marten Elgiloy - Elgin Watch Company made an alloy of cobalt, chromium, iron and nickel marketed by Rocky Mountain Orthodontics

Buonocore (1955)- Acid Etch Technique Melvin Moss(1960)- Functional Matrix Theory of Growth

Newmann (1965)- Introduced Bonding. Wilson and Kent (1972)- Intoduced Glass Ionomer Cement. Majjer and Smith (1979)- Introduced crystal growth theory to promote bonding (sulfated polyacrylic acid).

Percival Raymond Begg (1898-1983) Worked with Dr. Angle in 1924-25 after which he began using edgewise. In 1940s, along with Arthur Wilcock did extensive research and produced a cold drawn, heat treated wire that combined a balance between hardness and resilience with unique property of zero stress relaxation. In 1954, he described his multiple loop light force round wire technique in Modified ribbon arch brackets. In 1956, introduced the concept of DIFFERENTIAL FORCE.

Lawrence Andrews – Straight Wire Appliance (1972) William Profitt - Author Contemporary Orthodontics (most widely used) Co-author of 2 books on Surgical Orthodontics 125 scientific papers Peter Kesling (1980)- Tip Edge Appliance (combination of Begg and straightwire appliance)

History of Archwire George Andreasen (1970s)- Nitinol Burstone (1980)- TMA ( stabilised beta phase titanium alloy) Tien Hua Cheng (1985)- Chinese NiTi Miura F et al (1986)- Japanese NiTi Rohit Sachdeva – Copper NiTi A.J Wilcock - alpha phase titanium wire Rohit Sachdeva - Titanium- Neobium finishing archwire Deva Devanathan - Timolium Talass (1992)- Optiflex

Removable Appliances

In The United States- George Crozat - Crozat appliance In Europe- Martin Schwarz – Split plate appliances Philip Adams – Adams Clasp/ Modified arrowhead clasp

Functional Appliances

Roux (1883)- FIRST articulated the principle of functional appliance Pierre Robin (1902)- MONOBLOC

Viggo Andresen (1910)- ACTIVATOR Balters - BIONATOR Ian Clark- TWIN BLOCK ACTIVATOR TWIN BLOCK BIONATOR

Emil Herbst (1909) Introduced first fixed functional appliance. Also developed Quad Helix which was popularised by Ricketts.

Rolf Frankel (1969-73) - FUNCTIONAL REGULATOR FR 2

FR 3

HISTORY OF FIXED ORTHODONTIC APPLIANCES

Angle’s progression to the Edgewise Appliance E- Arch Pin and Tube Ribbon arch Edgewise Begg Appliance - Raymond Begg Pre-adjusted Edgewise/ Straight Wire Appliance – Lawrence F. Andrews Tip- Edge Technique – Peter C. Kesling Lingual Technique – Craven Kurz

E-Arch Appliance (1900) First design of Angle Consisted of bands only on the first molars Wire ligatures tied to a heavy archwire . Each end of the wire threaded, and a small nut placed on the threaded portion to advance it, to advance arch perimeter.

Pin and Tube Appliance (1910) • Placed bands on other teeth. • Vertical tube on each tooth into which a pin, soldered to the archwire , was placed. • Repositioned the pins.

Ribbon Arch Appliance (1916) Modified the bracket • Provided a vertically positioned rectangular slot • 10 X 20 gold wire held firmly with pins • Small enough to have good spring qualities • Poor control of root position

THE EDGEWISE APPLIANCE (1928) Angle reoriented the slot from vertical to horizontal and inserted a rectangular wire “edgewise”— with its greater dimension perpendicular to the long axis of the teeth. Archwire was tied in place with steel ligatures. The archwire was of .022 x 028-in gold. First bracket to move teeth in all 3 planes simultaneously. It soon became the most popular appliance in the United States.

Begg Appliance Had been taught the ribbon arch appliance at the Angle School . 1925- Returned to Adelaide Used ribbon arch appliances & non- extraction philosophy- Severe relapses- Dissatisfied with the treatment results 1928- Began extraction Modified Ribbon arch – - Replaced precious metal ribbon arch with 16mil round SS wire - Slot pointed gingivally - Added auxiliary springs for control of root position

Straight Wire Appliance (1970s) Lawrence F Andrews – 6 keys of occlusion Modification of edgewise appliance Rectangular slots similar to edgewise Pre-programmed brackets No need for complex wire bending

The Roth Philosophy Roth introduced a bracket set up containing modifications of the tip, torque, rotations and in-out movements of the Andrew’s standard set up bracket. Purpose of the Roth Rx- To reduce the need for a large inventory of bands and brackets. Over Correction : Roth propagated a therapy goal in which at the end of treatment all teeth were positioned slightly overcorrected and from which the would most likely settle into a non orthodontic normal position. He developed his prescription through trial and error on treated cases, and the Roth Rx was commercially made available in 1975.

MBT  • Mclaughlin , Bennett and Trevisi redesigned the entire standard bracket system to complement their proven treatment philosophy and to overcome the inadequacies of SWA. •They re-examined Andrew’s original findings and took into account additional research input from Japanese sources. •This 3rd generation bracket system is designed for use with light continuous forces, lacebacks,bendbacks and sliding mechanics.

Tip-Edge Technique Introduced by Dr. Peter Kesling Combined Begg’s light forces with edgewise’s better finishing. Initial crown tipping done , which greatly facilitates tooth movement, prior to edgewise finishing– Differential Straight Arch Technique Parkhouse R. Tip Edge Orthodontics and the plus bracket. 2 nd ed. Elsevier(2009).

Alexander (1978) " Vari " - variety of bracket types used. "Simplex" related to the concept of keeping all aspects of the discipline as simple as possible. Arch wire fabrication and the incorporation of many aspects of treatment options into the brackets ( ie , elastics hooks and rotational wings on the brackets) added up to the "simplex" concept. Based on edgewise philosophy.

Contribution of Indians

Ravindra Nanda Prof. and Head, Dept of Orthodontics, University of Connecticut, Farmington. INNOVATOR. AUTHOR. EDITOR. LECTURER. AWARDS RECIPIENT. LIFE MEMBER of IOS.

Bhavna Shroff Faculty member, Dept of Orthodontics,University of Maryland, Baltimore (1989-2002). Currently, Professor, Virginia Commonwealth University. Research Interests- FUNDAMENTALS MECHANISMS OF TOOTH ERUPTION

Dr. Rohit Sachdeva Professor, Orthodontics, Baylor College of Dentistry and Texas A and M University, Dallas. Holds more than a dozen patents. Introduced Copper-Nickel-Titanium, Titanium- Neobium alloys and Titanium brackets. Numerous honors and awards including JAPANESE SOCIETY OF PROMOTION OF SCIENCE FELLOWSHIP AWARD

History of Orthodontic Societies

World's first orthodontic society - " The Society of Orthodontists". In 1902 the word "American" was added and it became "The American Society of Orthodontists". This society of eleven men was the embryo which has developed into the present American Association of Orthodontists , now a representative group of some fifteen hundred members. Established a quarterly magazine known as "The American Orthodontist" . It was financed by a contribution of one hundred dollars from each member of the organization-a considerable amount in those days.”

Northcroft Letter ‘Anyone may belong to us, whether he practice dentistry or not, if only he be interested in the problems that interest us.’ - George Northcroft

BOS came into existence on 1 July 1994 by the unification of the five existing national orthodontic societies- The British Society for the Study of Orthodontics , founded in 1907. The Consultant Orthodontists Group , formed in 1964. The Community Orthodontists Section of the British Association of Orthodontists . The British Association of Orthodontists (“BAO”) , established in 1965. The Association of University Teachers of Orthodontics.

The Indian Orthodontic Society, a 6000 plus strong professional Society is the first Speciality society in Dentistry in India. The IOS started as a Study Group in Bombay, now Mumbai, way back in the year 1963 and was formally established as the INDIAN ORTHODONTIC SOCIETY on Friday the 5th October 1965 . The late Dr.H.D . Merchant was the founder President and Dr. Naishadh Parikh the Founder Secretary and treasurer. The other founder members were Late Dr. A.B.Modi , Dr. Keki Mistry , Dr.Mohandas Bhat , Dr. Prem Prakash and Late Dr. H.S.Shaikh . 

History of Orthodontic Journals

American Journal of Orthodontics and Dentofacial Orthopedics

The Angle Orthodontist

Journal of Orthodontics

The European Journal of Orthodontics

The Journal of Indian Orthodontic Society

RECENT ADVANCES

IN-office Cone Beam CT Scanners

Orthodontic Miniscrews

Clear Brackets

Wilckodontics Wilckodontics , also known as Accelerated Osteogenic Orthodontics (AOO)™, begins with a minimally invasive surgical procedure, usually done under general anesthesia , to remove a small portion of the alveolar bone’s external surface. For a short period of time, the bone’s mineral content will be decreased, allowing braces to quickly move teeth into their desired positions. The alveolar bone will heal quickly and actually become stronger than it was before the procedure William Wilcko . M. Thomas Wilcko . Accelerated tooth movement: The case of corticotomy -induced orthodontics. AJODO. July 2013. Vol 144. Issue 1. pg 4 6 8 10 12

Bioprogressive Therapy Dr.Robert Murray Ricketts. It takes advantage of biological progression including growth,development and function and directs them in a fashion that normalizes function and enhances esthetic effects.

Lingual Orthodontics Dr. Craven Kurz in 1976. Advantages: Highly esthetics Disadvantages: Poor acess . Difficulty in speech.

self- ligating brackets

Since the first use of a small catgut cord or applying finger pressure to slowly shift the teeth into proper alignment, orthodontics has come a long way. It is an ever evolving field and orthodontists are able to treat patients more efficiently, effectively and comfortably than ever before. There is still room for growth in the world of orthodontics. Advancements will decrease the length of treatment and cost even further, so people seeking orthodontic treatment will increase. CONCLUSION

THANK YOU