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INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandentalacademy.com

www.indiandentalacademy.com
INTRODUCTION TO STRAIGHT WIRE
APPLIANCE AND ITS EVOLUTION.
COMPARISON BETWEEN ANDREWS
AND ROTH BRACKET SYSTEMS.

www.india...
INTRODUCTION.


LARRY ANDREWS BROUGHT FORWARD THE
STRAIGHT WIRE APPLIANCE.



EDGE WISE APPLIANCE WAS FORERUNNER
OF STRA...


ANDREWS DEVELOPED STRAIGHT
WIRE APPLIANCE BY SERIES OF 14
RESEARCH WORKS.



ONE LED TO SIX KEYS OF OPTIMAL
OCCLUSION....
EVOLUTION OF BRACKET AND
BRACKET SYSTEMS.


BANDELLETE PLATES:IN LATE 1800
PIERRE FAUCHARD ACHIEVED
EXPANSION OF DENTAL A...


E-ARCH:1907 ANGLE
DEVELOPED THE EARCH.HEAVY LABIAL
ARCH WIRE WITH
THREADED ENDS WERE
SOLDERED TO MOLAR
BANDS.

www.indi...


PIN AND TUBE
APPLIANCE:INTRODUCED BY
ANGLE IN 1910.CLOSE
FIT BETWEEN THE PIN
ON ARCH WIRE AND
VERTICAL TUBE ON
BAND PRO...


RIBBON ARCH
APPLIANCE:BY ANGLE IN
1919.THIS WAS
THE FIRST
APPLIANCE TO
USE “TRUE
BRACKET”.
THE RIBBON
ARCH WAS HELD
IN ...


EDGE-WISE APPLIANCE:-



INTRODUCED IN 1925.



NOMENCLATURE EDGEWISE
WAS TO DEIGNATE THE
NEW HORIZONTAL PLANE
OF INS...
LABIO-LINGUAL APPLIANCE:JOHN
MERSHON DEVELOPED THE SYSTEM
IN 1926.HEAVY LABIAL AND LINGUAL
ARCH WIRES WERE PLACED ON
MOLAR...


MODIFIED RIBBON
ARCH
BRACKETS(BEGGS).



1928 P.R. BEGG
MODIFIED RIBBON
ARCH BRACKETS
BY REDUCING THE
SLOT SIZE TO
IMP...


TWIN WIRE ATTACHMENT: 1938 JOSEPH JOHNSON INTRODUCED TWIN
ARCH APPLIANCE BASED ON PHILOSOPHY THAT
THIN GUAGE WIRE PROD...






IN 1952 REED HOLDAWAY ANGULATED
BRACKETS ON BAND STRIP MATERIALTO
OBATAIN CORRECT MESIO-DISTAL
POSITIONING OF TOO...
ANDREWS BRACKET
SYSTEM. OF PROGRAMMING TOOTH
 THE CONCEPT

GUIDANCE INTO BRACKET SYSTEM THAN INTO
THE WIRE IS BASED ON SI...


EDGE WISE BRACKETS ARE NON
PROGRAMMED BECAUSE OF BILATERAL
SYMMETRY OF THE BRACKETS.



IF LOCATED ON FA POINT AND THE...
DESIGN SHORT COMINGS IN
EDGE WISE.










REQUIRE COMPLEX ARCH WIRE BENDING.
BRACKET BASES ARE PERPENDICULAR TO
B...
THE APPLIANCE SYSTEM CONSITS OF 2
BRACKET SYSTEMS.






FULLY PROGRAMMED STANDARD
BRACKETS.
FULLY PROGRAMMED TRANSLATI...
SLOT SITING FEATURES:MID TRANSVERSE
PLANE: MID

TRANSVERSE
PLANE OF
SLOT,STEM
AND CROWN
SHOULD BE
SAME.
www.indiandentala...


THE BASE OF
BRACKET SHOULD
HAVE SAME
INCLINATION AS THE
FACIAL PLANE OF
CROWN AT FA POINT.



THE BASE OF
BRACKET MUST...
MID SAGGITAL PLANE.


MID SAGGITAL
PLANE OF
SLOT,STEM AND
CROWN SHOULD
BE SAME.

www.indiandentalacademy.com


PLANE OF BRACKET
BASE AT ITS BASE
POINT MUST BE
IDENTICAL TO THE
FACIAL PLANE OF
CROWN AT FA
POINT.IN MAX MOLARS
IT IS ...


THE VERTICAL
COMPONENTS,MESIODIST
AL BORDERS OF
BRACKET STEM AND THE
WINGS SHOULD BE
PARALLEL TO ONE
OTHER AND THUS
SHO...
MID FRONTAL PLANE:

ALL SLOT POINTS
SHOULD HAVE SAME
DISTANCE BETWEEN
THEM AND CROWN
EMBRASSURE LINE.



THE DISTANCE
BE...
CONVENIENCE FACTORS:

THESE FEATURES MAKE THE
APPLIANCE EASIER FOR
ORTHODONTIST TO USE AND
SOMETIMES COMFORTABLE TO
PATIE...


THE FACIAL
SURFACE OF
INCISOR AND
CANINE BRACKETS
ARE DESINGNED
PARALLEL TO
THEIR BASES
WHICH INTURN
PARALLEL TO
CROWN ...
AUXILLARY FEATURE:

THESE CONTRIBUTE TO THE
BIOLOGIC ASPECTS OF TREATMENT.



EXAMPLES ARE POWER
ARM,HOOKS,FACE BOW
TUBE...
TIP AND TORQUE VALUES.
UPPER 1
5/7

2

3

4

9/3 11/-7 2/-7

5

6

7

2/-7

5/-9

5/-9

LOWER
2/-1 2/-1 5/-11 2/-17 2/-22 ...
FOR ANTERIOR TEETH.


3 DESINGS WITH VARYING INCLINATION
VALUES ARE AVAILABLE FOR UPPER AND
LOWER INCISORS DEPENDING ON
D...


CATEGORY II:-CLASS I CASE AND
UPPER CENTRAL IDEALLY INCLINED
TORQUE VALUE IS 7.UPPER LATERAL
IT IS 3 AND LOWER INCISOR ...
FOR POSTERIOR TEETH.


ONE STANDARD BRACKET IS USED FOR
EACH TOOTH TYPES FOR MOLARS.MOLARS
REQUIRE ANYONE 2 TUBES DEPENDI...
FULLY PROGRAMMED TRANSLATION
BRACKETS.


WHEN BODILY MOVEMENT OF TEETH ARE
REQUIRED TO EXRTRACTION SPACES PROBLEM IS
ENCO...
3 CLASSES OF TRANSLATION
SERIES:


MINIMAL TRANSLATION BRACKETS:TOOTH TANSLATION LESS THAN 2 MM



MEDIUM TRANSLATION BR...
ADDITIONAL SLOT FEATURE:

COUNTER ROTATION:

FACTOR IS BUILT BY ROTATING THE SLOT AROUND
ITS VERTICAL AXIS IN DIRECTION ...


MORE THE TRANSLATION MORE IS
COUNTER ROTATION FACTOR.



MINIMUM TRANSLATION BRACKET:-2.



MEDIUM TRANSLATION BRACKE...
COUNTER MESIO DISTAL
TIP:

WHEN A MESIAL OR DISTAL FORCE IS
APPLIED THE CROWN TENDS TO PRECEDE
THE ROOTS IN THE DIRECTION...




MINIMUM TRANSLATION BRACKET:- -2
MEDIUM TRANSLATION BRACKET:- -3
MAXIMUM TRANSLATION BRACKET:- -4



FOR EFFECTIVE...


LENGTH OF POWER ARM WILL VARY
ACCORDING TO LENGTH OF THE
TEETH.



FOR CANINE THE POWER ARM WILL
BE 5MM.



FOR MOLAR...


LOWER TORQUE IN LOWER INCISOR
BUCCAL SEGEMNTS REMAIN
NORMAL,BECAUSE OVERCORRECTION IN
THIS PLANE ONLY LEADS TO PROBLEM
...
COUNTER BUCCOLINGUAL TIP:

ONLY ADDED TO MAXILLARY MOLAR TRANSLATION
BRACKETS.



WHEN MOLAR TRANSLATES MESIALLY DUE TO ...
ROTH BRACKET
SYSTEM. INTRODUCED THE
 IN 1970 ANDREWS
STRAIGHT WIRE APPLIANCE.



IN 1976 ROTH PUBLISHED A REPORT

“FIVE ...


PURPOSE OF ROTH SETUP WAS TO PROVIDE
OVER CORRECTED TOOTH POSITIONS PRIOR TO
THE APPLIANCE APPLIANCE REMOVAL THAT
WOULD...


HENCE ROTH ALTERDED THE
PRESCRIPTION OF ANDREWS
BRACKET IN ALL 3 PLANES OF SPACE.

UPPER 1

2

3

4

5/-12 9/8 13/-2 O/...
BRACKET POSITIONING.
CENTRAL INCISOR
LATERAL INCISOR

MAXILLARY MANDIBULAR
3.5MM
3.5MM
3.5MM
3.5MM

CANINE

4MM

4MM

1ST ...


PLACING BICUSPID BRACKET 0.5MM
GINGIVALLY TO MOLAR ATTCHMENT
USUALLY LEVELS THE MARGINAL
RIDGES QUITE WELL.



WHEN LO...
PRESCRIPTION SOURCE:

MAXILLARY PRESCRIPTION:



ROTH HAS EXTRA TORQUE IN INCISOR(5 DEGREE
MORE THAN NORMAL)

INCREASED...
5 DEGREE TORQUE INCREASES
FOR UPPER INCISOR:

IMPROVED AESTHETICS.



PROVIDED MORE SPACE FOR LOWER
ANTERIOR TEETH THERE...


THERE WILL BE CORRESPONDINGLY LESS –VE

TORQUE IN UPPER CANINE TO OFFSET THE

RECIPROCAL EFFECT OF BUILDING MORE TORQUE...


THE UPPER CANINE HAVE 2 DEGREE ROTATION
TO MESIAL.



“SUPER TORQUE” SET OF MAXILLARY ANTERIOR
FOR CASES LIKE CLASS II...
MANDIBULAR PRESCRIPTION:

INSCIOR BRACKETS ARE SAME AS
NON ORHTODONTIC MODELS.



LOWER ANTERIORS HAVE BRACKET
WITH CHAM...


THERE IS A 0 DEGREE ROATION SET FOR
CASES WHERE ONLY 2 UPPER BICUSPIDS ARE
EXTRACTED.



IT IS RECOMMENDED THAT “SUPER...


IN ROTHS PRESCRIPTION OF ANDREW’S APPLIANCE THE
ANTERIOR BRACKETS WERE PLACED SLIGHTLY MORE
INCISALLY FROM ANDREWS “MID...
AS ROTH SAYS
• “AT HEART OF EVERY
EXCELLENT TREATMENT LIES
IN WELL PLACED
APPLIANCE,REGARDLESS OF
APPLIANCE THAT IS USED ”...
REFERENCE:• ANDREWS.L.F.-THE STRAIGHT WIRE
CONCEPT AND APPLIANCE.
• GRABER AND SWAIN.
• GRABER AND VANARSDALL.
• BONHAM
MA...
• THANK YOU

THANK YOU.
www.indiandentalacademy.com
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Introduction to straight wire appliance and its evolution /certified fixed orthodontic courses by Indian dental academy

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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.


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Introduction to straight wire appliance and its evolution /certified fixed orthodontic courses by Indian dental academy

  1. 1. INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  2. 2. INTRODUCTION TO STRAIGHT WIRE APPLIANCE AND ITS EVOLUTION. COMPARISON BETWEEN ANDREWS AND ROTH BRACKET SYSTEMS. www.indiandentalacademy.com
  3. 3. INTRODUCTION.  LARRY ANDREWS BROUGHT FORWARD THE STRAIGHT WIRE APPLIANCE.  EDGE WISE APPLIANCE WAS FORERUNNER OF STRAIGHT WIRE APPLIANCE PUT FORWARD BY EDWARD.H.ANGLE.  THE TERM STRAIGHT WIRE REFERS TO APPLIANCE DESINGNED BY ANDREWS WHICH WAS TRA DEM RKED A D A N MN A UFA CTURED BY “A -CO M N PA Y” www.indiandentalacademy.com SANDIAGO USA.
  4. 4.  ANDREWS DEVELOPED STRAIGHT WIRE APPLIANCE BY SERIES OF 14 RESEARCH WORKS.  ONE LED TO SIX KEYS OF OPTIMAL OCCLUSION.  5 LED TO CONCEPT OF STRAIGHT WIRE.  8 WERE DESINGNED TO EXPLAIN AND JUSTIFY THE CONCEPT. www.indiandentalacademy.com
  5. 5. EVOLUTION OF BRACKET AND BRACKET SYSTEMS.  BANDELLETE PLATES:IN LATE 1800 PIERRE FAUCHARD ACHIEVED EXPANSION OF DENTAL ARCHES BY LIGATING THE TEETH WITH BRASS OR SILVER LIGATURE WIRE TO CRUDE METAL PLATES. www.indiandentalacademy.com
  6. 6.  E-ARCH:1907 ANGLE DEVELOPED THE EARCH.HEAVY LABIAL ARCH WIRE WITH THREADED ENDS WERE SOLDERED TO MOLAR BANDS. www.indiandentalacademy.com
  7. 7.  PIN AND TUBE APPLIANCE:INTRODUCED BY ANGLE IN 1910.CLOSE FIT BETWEEN THE PIN ON ARCH WIRE AND VERTICAL TUBE ON BAND PROVIDED AXIAL CONTROL. www.indiandentalacademy.com
  8. 8.  RIBBON ARCH APPLIANCE:BY ANGLE IN 1919.THIS WAS THE FIRST APPLIANCE TO USE “TRUE BRACKET”. THE RIBBON ARCH WAS HELD IN OCCLUSALLY FACING VERTICAL SLOTS OF BRACKETS WITH HELP OF LOCK PINS. www.indiandentalacademy.com
  9. 9.  EDGE-WISE APPLIANCE:-  INTRODUCED IN 1925.  NOMENCLATURE EDGEWISE WAS TO DEIGNATE THE NEW HORIZONTAL PLANE OF INSERTION OF RECTANGULAR ARCH WIRE.  ADVANTAGE WAS CONTROL OVER 3 PLANES OF SPACE AND EASE OF MANIPULATION. www.indiandentalacademy.com
  10. 10. LABIO-LINGUAL APPLIANCE:JOHN MERSHON DEVELOPED THE SYSTEM IN 1926.HEAVY LABIAL AND LINGUAL ARCH WIRES WERE PLACED ON MOLAR BANDS.FINGER SPRINGS WERE SOLDERED TO ARCH WIRE TO MOVE THE TEETH.  UNIVERSAL APPLIANCE:INTRODUCED BY SPENCER ATKINSON IN 1935.  www.indiandentalacademy.com
  11. 11.  MODIFIED RIBBON ARCH BRACKETS(BEGGS).  1928 P.R. BEGG MODIFIED RIBBON ARCH BRACKETS BY REDUCING THE SLOT SIZE TO IMPROVE THE ROTATIONAL CONTROL WITH 0.016 INCH ARCH WIRE AND SLOT GINGIVALLY. www.indiandentalacademy.com
  12. 12.  TWIN WIRE ATTACHMENT: 1938 JOSEPH JOHNSON INTRODUCED TWIN ARCH APPLIANCE BASED ON PHILOSOPHY THAT THIN GUAGE WIRE PRODUCE GENTLE MOVEMENT OF TEETH. IF 2 LIGHT WIRE ARE PLACED IN SAME BRACKET MORE PHYSIOLOGIC TOOTH MOVEMENT WILL OCCUR.  TWEED-MERRIFIELD EDGEWISE APPLIANCE.: THE APPLIANCE COMPOSED OF NUETRAL 0.22 EDGEWISE SLOTS WITH DOUBLE WIDTH BRACKETS ON 6 ANTEROR TEETH,INTERMEIDIATE SINGLE WIDTH BRACKETS ON PREMOLAR BANDS,TWIN BRACKETS ON FIRST MOLARS,0.22 TUBES WITH MESIAL HOOKS ON SECOND MOLARS. www.indiandentalacademy.com
  13. 13.    IN 1952 REED HOLDAWAY ANGULATED BRACKETS ON BAND STRIP MATERIALTO OBATAIN CORRECT MESIO-DISTAL POSITIONING OF TOOTH. IVAN LEE INTRODUCED MILLING OF TORGUE INTO FACE OF BRACKET SLOT. IN 1958 JOHN .J. STIFTER  DESINGNED EDGEWISE APPLIANCE OF 2 PARTS.ONE PART WAS ATTACHED TO TOOTH AND OTHER COMPONENT WITH VARIOUS COMBINATION OF INCLINATION,ANGULATION AND PROMINENCE. www.indiandentalacademy.com
  14. 14. ANDREWS BRACKET SYSTEM. OF PROGRAMMING TOOTH  THE CONCEPT GUIDANCE INTO BRACKET SYSTEM THAN INTO THE WIRE IS BASED ON SIMILARITIES WHICH PREVAIL IN MORPHOLOGY OF TOOTH TYPES AND IN THEIR POSITION WHEN THEY ARE OPTIMALLY OCCLUDED.   TO ELIMIANTE ARCH WIRE BENDING MORE SLOT SITING FEATURES ARE NECESSARY THAN CORRECT AMOUNT OF SLOT ANGULATION,INCLINATION,AND FACIAL PROMINENCE. THE BRACKETS WITH ONLY THESE 3 FEATURES ARE CALLED PARTLY PROGRAMMED ,BECAUSE THEY WILL NOT TARGET THE SLOT WITH 2 DEGREE AND 0.5 MM OF www.indiandentalacademy.com SLOT SITE.
  15. 15.  EDGE WISE BRACKETS ARE NON PROGRAMMED BECAUSE OF BILATERAL SYMMETRY OF THE BRACKETS.  IF LOCATED ON FA POINT AND THE FACC AND USED WITH LARGE UNBENT WIRES WOULD CAUSE INCLINATION OF FACIAL PLANE OF EACH CROWN TO BE 90 DEGREE TO THE OCCLUSAL PLANE.  DISADVANTAGE WAS ALL CROWNS HAVE EQUAL FACIAL PROMINENCE AND OCCLUSO GINGIVAL POSITION OF CROWN WILL BE IRREGULAR. www.indiandentalacademy.com
  16. 16. DESIGN SHORT COMINGS IN EDGE WISE.       REQUIRE COMPLEX ARCH WIRE BENDING. BRACKET BASES ARE PERPENDICULAR TO BRACKET SYSTEM. BRACKET BASE ARE NOT CONTOURED OCCLUSO GINGIVALLY. SLOTS ARE NOT ANGULATED. BRACKET STEM ARE OF EQUAL FACIO LINGUAL THICKNESS. MAXILLARY OFFSET NOT BUILT IN. www.indiandentalacademy.com
  17. 17. THE APPLIANCE SYSTEM CONSITS OF 2 BRACKET SYSTEMS.    FULLY PROGRAMMED STANDARD BRACKETS. FULLY PROGRAMMED TRANSLATION BRACKETS. DESIGN FEATURES: SLOT SITING FEATURES  CONVIENIENCE FEATURES  AUXILLARY FEATURES. www.indiandentalacademy.com
  18. 18. SLOT SITING FEATURES:MID TRANSVERSE PLANE: MID TRANSVERSE PLANE OF SLOT,STEM AND CROWN SHOULD BE SAME. www.indiandentalacademy.com
  19. 19.  THE BASE OF BRACKET SHOULD HAVE SAME INCLINATION AS THE FACIAL PLANE OF CROWN AT FA POINT.  THE BASE OF BRACKET MUST BE CONTOURED OCCLUSO GINGIVALLY TO MATCH THE CURVATURE. www.indiandentalacademy.com
  20. 20. MID SAGGITAL PLANE.  MID SAGGITAL PLANE OF SLOT,STEM AND CROWN SHOULD BE SAME. www.indiandentalacademy.com
  21. 21.  PLANE OF BRACKET BASE AT ITS BASE POINT MUST BE IDENTICAL TO THE FACIAL PLANE OF CROWN AT FA POINT.IN MAX MOLARS IT IS 100 DEGREES AND OTHER TEETH 90.  THE BASE OF BRACKET SHOULD BE CONTOURS TO MATCH THE MESIODISTAL WIDTH/RADIUS OF AREA OF CROWN IT IS DESIGNED TO FIT IN. www.indiandentalacademy.com
  22. 22.  THE VERTICAL COMPONENTS,MESIODIST AL BORDERS OF BRACKET STEM AND THE WINGS SHOULD BE PARALLEL TO ONE OTHER AND THUS SHOULD BE PARALLEL TO VERTICAL LANDMARKS OF CROWN.  THE HORIZONTAL COMPONENTS(SUPERIOR AND INFERIOR EDGE OF BRACKET STEM SHOULD BE EQUI DISTAMT FROM CROWNS GINGIVAL AND CUSP TIP OR INCISAL EDGE www.indiandentalacademy.com
  23. 23. MID FRONTAL PLANE: ALL SLOT POINTS SHOULD HAVE SAME DISTANCE BETWEEN THEM AND CROWN EMBRASSURE LINE.  THE DISTANCE BETWEEN THE SLOT POINTS AND FACE OF EACH CROWN IS INDIRECTLY PROPOTIONAL TO PROMINENCE OF TOOTH.  STEM OF BRACKET MUST ACCOMMODATE FOR VARYING CROWN PROMINENCE. www.indiandentalacademy.com
  24. 24. CONVENIENCE FACTORS: THESE FEATURES MAKE THE APPLIANCE EASIER FOR ORTHODONTIST TO USE AND SOMETIMES COMFORTABLE TO PATIENT.  GINGIVAL TIE WINGS ON POSTERIOR BRACKET ARE DESINGNED TO EXTEND LATERALLY.THIS FACILITATES LIGATION AND ELIMINATES GINGIVAL IMPINGEMENT .  SINCE BRACKET BASES ARE INCLINED THE STEM AND TIE WINGS OF MANDIBULAR MOLARS AND MOLARS ARE DIRECTED MORE GINGIVALLY.THIS ELIMINATES www.indiandentalacademy.com OCCLUSAL
  25. 25.  THE FACIAL SURFACE OF INCISOR AND CANINE BRACKETS ARE DESINGNED PARALLEL TO THEIR BASES WHICH INTURN PARALLEL TO CROWN FACES.THIS ENHANCES LIP COMFORT. www.indiandentalacademy.com
  26. 26. AUXILLARY FEATURE: THESE CONTRIBUTE TO THE BIOLOGIC ASPECTS OF TREATMENT.  EXAMPLES ARE POWER ARM,HOOKS,FACE BOW TUBES,UTILITY TUBES AND ROTATION WINGS. www.indiandentalacademy.com
  27. 27. TIP AND TORQUE VALUES. UPPER 1 5/7 2 3 4 9/3 11/-7 2/-7 5 6 7 2/-7 5/-9 5/-9 LOWER 2/-1 2/-1 5/-11 2/-17 2/-22 2/-26 2/-31 www.indiandentalacademy.com
  28. 28. FOR ANTERIOR TEETH.  3 DESINGS WITH VARYING INCLINATION VALUES ARE AVAILABLE FOR UPPER AND LOWER INCISORS DEPENDING ON DIFFERENT SKELETAL BASE RELASHIONSHIP.  CATEGORY I:-CLASS 2 RETROCLINED UPPER INCISOR THE TORQUE VALUE IS +2. FOR LATERAL IS -2.MANDIBULAR INCISOR ARE PROCLINED MINIMALLY WITH TORQUE VALUE 4 DEGREES. www.indiandentalacademy.com
  29. 29.  CATEGORY II:-CLASS I CASE AND UPPER CENTRAL IDEALLY INCLINED TORQUE VALUE IS 7.UPPER LATERAL IT IS 3 AND LOWER INCISOR IT IS -1 DEGREES.  CATEGORY III:-CLASS III CASE MILDLUY PROCLINED INCISOR TORQUE VALUE FOR UPPER CENTAL IS +12 AND 8 FOR UPPER LATERAL AND -6 FOR LOWER INCISOR. www.indiandentalacademy.com
  30. 30. FOR POSTERIOR TEETH.  ONE STANDARD BRACKET IS USED FOR EACH TOOTH TYPES FOR MOLARS.MOLARS REQUIRE ANYONE 2 TUBES DEPENDING ON CLINICAL SITUATION.    CLASS I INTERARCH RELASHION IN WHICH STANDARD MOLAR TUBES ARE USED. CLASS II INTERARCH RELASHIONSHIP IN WHICH 2 PREMOLARS ARE EXTRACTED FROM UPPER ARCH ONLY. DISTAL OFFSET OF 10 DEGREES IS BUILT INTO TUBE OF CLASS I UPPER MOLAR AND CLASS II MOLAR HAS O DEGREE OFFSET. www.indiandentalacademy.com
  31. 31. FULLY PROGRAMMED TRANSLATION BRACKETS.  WHEN BODILY MOVEMENT OF TEETH ARE REQUIRED TO EXRTRACTION SPACES PROBLEM IS ENCOUNTERED IN MESIODISTAL TIP AND ROTATION OF TEETH ADJACENT TO EXPTRACTION SITE .  IN UPPER MOLARS DUE TO PROMINENT PALATAL ROOT BUCCOLINGAL TIP ALSO HAS TO BE COUNTERACTED.  THUS ANDREWS DEVISED THE TRANSLATION SERIES OF BRACKETS. www.indiandentalacademy.com
  32. 32. 3 CLASSES OF TRANSLATION SERIES:  MINIMAL TRANSLATION BRACKETS:TOOTH TANSLATION LESS THAN 2 MM  MEDIUM TRANSLATION BRACKET:TRANSLATION MORE THAN 2 MM LESS THAN 4MM.  MAXIMUM TRANSLATION BRACKETS:DISATNCE TO BE MOVED MORE THAN 4MM. www.indiandentalacademy.com
  33. 33. ADDITIONAL SLOT FEATURE: COUNTER ROTATION: FACTOR IS BUILT BY ROTATING THE SLOT AROUND ITS VERTICAL AXIS IN DIRECTION IT HAS TO BE TRANSLATED.  THIS FEATURE COUNTERACTS TOOTH ROTATION CAUSED BY MESIAL OR DISTAL FORCE.THIS ROTATION IS OVER CORRECTED WHEN TRANSLATION IS COMPLETE.  EFFICIENT TRANSFER OF FORCE FROM BRACKET SLOT TO CENTRE OF CROWN FOR ROTATIONAL CONTROL THE MESIODISTAL LENGTH OF BRACKET SHOULD BE EQUAL TO THE DISTANCE FROM THE SLOT POINT TO THE TOOTH VERTICAL AXIS.ANDREWS CONSIDERED THIS DISTANCE AS 4MM. www.indiandentalacademy.com
  34. 34.  MORE THE TRANSLATION MORE IS COUNTER ROTATION FACTOR.  MINIMUM TRANSLATION BRACKET:-2.  MEDIUM TRANSLATION BRACKET BRACKET:-4.  MAXIMUM TRANSLATION BRACKET:-6. www.indiandentalacademy.com
  35. 35. COUNTER MESIO DISTAL TIP: WHEN A MESIAL OR DISTAL FORCE IS APPLIED THE CROWN TENDS TO PRECEDE THE ROOTS IN THE DIRECTION OF FORCE APPLIED.  TO PREVENT THIS TRANSLATION BRACKETS ARE DESINGNED WITH COUNTER TIP FEATURE.  DONE BY INCREASING OR DECREASING THE ANGULATION OF THE SLOT. www.indiandentalacademy.com
  36. 36.    MINIMUM TRANSLATION BRACKET:- -2 MEDIUM TRANSLATION BRACKET:- -3 MAXIMUM TRANSLATION BRACKET:- -4  FOR EFFECTIVE TRANSLATION TO OCCUR THE MESIO DISTAL TIP SHOULD BE COUNTERACTED BY A BALANCED COUNTER MOMENT.  COUNTER MESIO DISATL TIP OF BRACKET WILL NOT BE SUFICENT TO BRING ABOUT THIS BALANCE AS MESIO DISTAL WIDTH OF BRAKET IS NOT EQUAL TO THE DISTANCE FROM SLOT POINT TO CENTRE OF RESISTANCE OF TOOTH.  SO AN EXTENSION “POWER ARM” IS ESSENTIAL TO MAKE UP FOR DEFICIENT LENGTH OF BRACKET. www.indiandentalacademy.com
  37. 37.  LENGTH OF POWER ARM WILL VARY ACCORDING TO LENGTH OF THE TEETH.  FOR CANINE THE POWER ARM WILL BE 5MM.  FOR MOLARS MESIO DISTAL WIDTH OF TUBE IS MORE AND CENTRE OF RESISTANCE OF TOOTH IS MORE OCCLUSAL THAN THAT OF CANINES. www.indiandentalacademy.com
  38. 38.  LOWER TORQUE IN LOWER INCISOR BUCCAL SEGEMNTS REMAIN NORMAL,BECAUSE OVERCORRECTION IN THIS PLANE ONLY LEADS TO PROBLEM AND INTERENCES.  THE TWO LOWER MOLARS HAVE EXACTLY THE SAME DEGREE OF ROOT TORQUE SINCE APPLIANCE RESTS ON MESIO BUCCAL CUSP.  OVER ROTATION BRACKET SLOTS ARE MILLED AT ON ANGLE TO PRODUCE A MESIALLY OR DISTALLY DIRECTED OVER ROTATION OR OFFSET SIMILAR IN BUCAL SEGMENT BRACKETS. www.indiandentalacademy.com
  39. 39. COUNTER BUCCOLINGUAL TIP: ONLY ADDED TO MAXILLARY MOLAR TRANSLATION BRACKETS.  WHEN MOLAR TRANSLATES MESIALLY DUE TO PROMINENT PALATAL ROOTS IT TIPS BUCALLY THUS OREINTING THE BUCCAL CUSP MORE GINGIVALLY AND LINGUAL CUSP MORE OCCLUSALLY.  IT IS RESOLVED BY ADDING COUNTER BUCCO LINGUAL TIP IN BRACKET BY INCREASING BUCCAL ROOT TORQUE. MINIMAL - 4 DEGREE TORQUE.  MEDIUM - 5 DEGREE TORQUE.  MAXIMUM - 6 DEGREE TORQUE.  www.indiandentalacademy.com
  40. 40. ROTH BRACKET SYSTEM. INTRODUCED THE  IN 1970 ANDREWS STRAIGHT WIRE APPLIANCE.  IN 1976 ROTH PUBLISHED A REPORT “FIVE YEAR CLINICAL EVALUATION OF ANDREWS STRAIGHT WIRE APPLIANCE”.  IN 1979 ROTH INTRODUCED A BRACKET SETUP CONTAINING MODIFICATION OF TIP,TORQUE,ROTATION AND IN AND OUT MOVEMNTS OF ANDREWS SETUP BRACKET. www.indiandentalacademy.com
  41. 41.  PURPOSE OF ROTH SETUP WAS TO PROVIDE OVER CORRECTED TOOTH POSITIONS PRIOR TO THE APPLIANCE APPLIANCE REMOVAL THAT WOULD ALLOW TEETH IN MOST INSTANCES TO SETTLE TO WHAT WAS FOUND IN THE NON ORTHODONTIC NORMALS STUDIED BY ANDREWS.  IT IS VIRTUALLY IMPOSSIBLE BECAUSE OF BRACKET INTERFERENCE TO POSITION THE TEETH PRECISELY INTO THE OCCLUSION SHOWN BY NON ORTHODONTIC NORMAL SAMPLE AND AFTER THE APPLIANCE REMOVAL,NO MATTER HOW WELL TREATED THE PATIENT TEETH WILL SHIFT SLIGHTLY FROM THE POSITION THEY OCCUPIED AT THE TIME APPLIANCE. IS REMOVED. www.indiandentalacademy.com
  42. 42.  HENCE ROTH ALTERDED THE PRESCRIPTION OF ANDREWS BRACKET IN ALL 3 PLANES OF SPACE. UPPER 1 2 3 4 5/-12 9/8 13/-2 O/-7 5 6 7 0/-7 0/-14 0/-14 LOWER 2/-1 2/-1 -1/-11 -1/-17 -1/-22 -1/30 www.indiandentalacademy.com -1/30
  43. 43. BRACKET POSITIONING. CENTRAL INCISOR LATERAL INCISOR MAXILLARY MANDIBULAR 3.5MM 3.5MM 3.5MM 3.5MM CANINE 4MM 4MM 1ST PREMOLAR 3.5 MM 3.5MM 2ND PREMOLAR 3.5MM 3.5MM 1 ST MOLAR 3MM 3MM 2ND MOLAR 2.5MM 3MM www.indiandentalacademy.com
  44. 44.  PLACING BICUSPID BRACKET 0.5MM GINGIVALLY TO MOLAR ATTCHMENT USUALLY LEVELS THE MARGINAL RIDGES QUITE WELL.  WHEN LONG CLINICAL CROWNS ALL BRACKET WILL BE PLACED FARTHER GINGIVALLY WITH USE OF UNIFORM INCREASE FOR EACH TOOTH CONSISTENT WITH ROTH VALUES. www.indiandentalacademy.com
  45. 45. PRESCRIPTION SOURCE: MAXILLARY PRESCRIPTION:  ROTH HAS EXTRA TORQUE IN INCISOR(5 DEGREE MORE THAN NORMAL) INCREASED INCISOR TORQUE IN ROTH SETUP TENDED TO CREATE A SLIGHT OVERJET THAT APPEARED THAT GRADUALLY AS TORQUE INFLUENCE OF HEAVY WIRE IN BRACKET SLOT WAS EXPRESSED. www.indiandentalacademy.com
  46. 46. 5 DEGREE TORQUE INCREASES FOR UPPER INCISOR: IMPROVED AESTHETICS.  PROVIDED MORE SPACE FOR LOWER ANTERIOR TEETH THERE BY GUIDING CLASS I INTERCUPATION.  ENCHANCED A GENTLE RISE AND REDUCED STRESS FUNCTION. www.indiandentalacademy.com
  47. 47.  THERE WILL BE CORRESPONDINGLY LESS –VE TORQUE IN UPPER CANINE TO OFFSET THE RECIPROCAL EFFECT OF BUILDING MORE TORQUE INTO INCISOR.  LINGUAL CROWN TIP OF UPPER CUSPID AND LABIAL PROMINENCE OF ROOTS WAS CAUSED BECAUSE OF 15 DEGREE TORQUE DIFFRENTIAL BETWEEN LATERAL AND CANINE IN ANDREWS.  TO AVOID THIS TORQUE OF UPPER CANINE WAS REDUCED TO -2 DEGREES SO THAT THEIR CROWNS WERE TIPPED OUT TO A MORE NEARLY VERTICAL INCLINATION. www.indiandentalacademy.com
  48. 48.  THE UPPER CANINE HAVE 2 DEGREE ROTATION TO MESIAL.  “SUPER TORQUE” SET OF MAXILLARY ANTERIOR FOR CASES LIKE CLASS II,DIV 2,WHEN AN EXTREME AMOUNT OF TORQUE MAY BE NEEDED.  UPPER BUCCAL SEGMENTS ARE DISTALLY UPRIGHTED TO 0 DEGREES,THE BISCUSPIDS ARE ROTATED 2 DEGREES MESIALLY TO OFFSET THE ROTATION THAT ACCOPANIES DISTAL ROTATION(TWICE THE AMOUNT FOUND IN NON ORTHODONTIC NORMALS) AND 14 DEGREE ROOT TORQUE(5 DEGREE MORE THAN NORMAL). www.indiandentalacademy.com
  49. 49. MANDIBULAR PRESCRIPTION: INSCIOR BRACKETS ARE SAME AS NON ORHTODONTIC MODELS.  LOWER ANTERIORS HAVE BRACKET WITH CHAMFERED INCISAL TIE WINGS.  LOWER CANINES HAVE 7 DEGREE MESIAL TIP AND 2 DISTAL ROTATION. www.indiandentalacademy.com
  50. 50.  THERE IS A 0 DEGREE ROATION SET FOR CASES WHERE ONLY 2 UPPER BICUSPIDS ARE EXTRACTED.  IT IS RECOMMENDED THAT “SUPER TORQUE” ANTERIORS BE USED IN THESE CASES TO MINIMIZE TOOTH SIZE DISCPREPENCY CREATED BY TAKING OUT BY 2 UPPER BICUSPID.  INCREASE IN TORQUE AND TIP UPPER INCISOR MAKES THEM OCCUPY MORE SPACE IN ARCH AS DOES MESIAL ROTATION OF UPPER FIRST MOLAR DUE TO 0 DEGREES ROTATION BRACKETS ON THESE TEETH. www.indiandentalacademy.com
  51. 51.  IN ROTHS PRESCRIPTION OF ANDREW’S APPLIANCE THE ANTERIOR BRACKETS WERE PLACED SLIGHTLY MORE INCISALLY FROM ANDREWS “MIDDLE OF CLINICAL CROWN” AND INGREDIENTS OF THOSE BRACKETS WERE ADJUSTED ACCORDINGLY.  IT IS TO ELIMINATE THE NEED TO PLACE REVERSE AND COMPENSATING BENDS INTO FINISHING WIRES.  PLACING ALL UPPER INCISORS AT SAME HEIGHT OVERCORRECTS OVERBITE AND IMPROVES ANTERIOR CONTACT DURING FUNCTION.  THE CENTRALS WILL SETTLE LONGER AFTER TRETMENT.  PLACING CUSPID BRACKET 0.5MM GINGIVALLY TO INCISOR BRACKET WILL RESULT IN CUSPID RISE DURING LATERAL EXCURSION OF THE MANDIBLE. www.indiandentalacademy.com
  52. 52. AS ROTH SAYS • “AT HEART OF EVERY EXCELLENT TREATMENT LIES IN WELL PLACED APPLIANCE,REGARDLESS OF APPLIANCE THAT IS USED ”. www.indiandentalacademy.com
  53. 53. REFERENCE:• ANDREWS.L.F.-THE STRAIGHT WIRE CONCEPT AND APPLIANCE. • GRABER AND SWAIN. • GRABER AND VANARSDALL. • BONHAM MAGNESS.W.1987(STRAIGHT WIRE CONCEPT) AJO VOL 73-541-550. • ANDREWS.L.F(1990)JCO INTERVIEWS VOL 24-491-508. www.indiandentalacademy.com
  54. 54. • THANK YOU THANK YOU. www.indiandentalacademy.com

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