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A general consideration of

Stage I in Begg Technique.

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Introduction

General objective of any ortho trt. toobtain a result that simulates normal

occlusion. With Begg tecchnique objective achieved

by dividing trt. into 3 stages.

Stages I and II Crown tipping phase.

Stage III Root tipping phase.

Stage IV Finishing phase

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Overlapping of the stages must be avoided.

Ie. Objectives of each stage met before

proceeding Therefore better results and fewer problems are

encountered.

Division into stages

to prevent anchorage failure

Teaching and learning made easier.

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Objectives of Stage I

Correction of crowding and irregularity

Closure of anterior spaces.

Correction of rotations.

Elimination of deep bites -edge to edgebite / openbite except in class III

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Openbites Overbite relations

Correction of Mesiodistal relations of

buccal segments Class I and Class II Mild class III

Class III Class I or Class II

Co-ordination of upper and lower arches.

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Correction of anterior and posterior crossbites.

Axial relation of anchor molars corrected upright position.

Extraction spaces become smaller

All tooth movements carried outsimultaneously & in both arches.

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Orthodontic apparatus in Stage I.

Attachments Bands, brackets, tubes &

lingual cleats.Archwires

Ligatures.

Elastics.

Auxiliaries.- Rotation springs.

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Apparatus applied simultaneously

to avoid breakage

Act simultaneously to reciprocal adv. witheach other

Creeping into trt. Also avoided Severe loss

of anchorage.

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Archwires Material

0.016 special AJW principal wire of Stage I.

Combination of resilienbcy and flexibility.

Adequate stiffness for bite opening Developed by rigid control in wire drawing

and heat trt.

0.018 special Molar extraction cases

0.014 special rotating springs.

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Parts.

Intermaxillary Hooks ( IMH )

Small loops for engaging elastics and cuspid ties 2 types

Boot

Circle/ Helical

Adv of Circle hook. 2 2.5 outside dia.

Mesial & Distal rolling possible

Less space requirement.

Less distortion Greater stiffness in horizontal and vertical plane.

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Location

Well aligned ant. 1-2 mm mesial to the

cuspid bracket. Spaced ant. Farther mesially.

Mildly crowded ant. impinging on thebracket.

Severley crowded multi loop wires.

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Anterior Segement.

Portion of the wire b/w intermaxillary IMH lies

gngival to buccal segment for effectiveintrusion

Reverse curve at midline 2-3 mm elevatedform occusal plane for even intrusion.

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Cuspid Offset bend.

Horizontal offset bend mesial to the IMH.

Proper positioning of the cuspid and the lateralincisor.

Cuspid Curve:

Labial curvature in cuspid area incorporatedto avoid lingual tipping of canines.

In narrow arches requiring expansion, cuspid

offset given.

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Anchorage bends / Tip back bends.

In buccal segment of the archwire mesial to

the tube with vertex facing occlusally.

Angulation depends on

Stage of trt. - as stage progresses.

Depth of overbite - with bite opening.

Rate of progress of case.

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Inclination of anchor molars.

Mild to moderate inclination slight anchor

bend.

Severe inclination Initially no anchor bend.

Later gradually increases anchor bend to

upright the molar.

No intrusion of anteriors beyond edge to edge

or mild openbite.

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Location depends on

Time elapsed since commencement of trt. as

far mesially.

Distal to ccuspid bracket.

In mild open bite and overbite anchor curve.

Depth of overbite.

Greater reduction in overbite if closer to the

molar tube.

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Rate of progress.

Amount of space remaining.

Location in looped archwire.

Non extn. cases

1st molar extn. cases.

2nd Premolar extn. cases.

Nearer

thetube

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Toe in and toe out bends.

Horizontal offset bends combined with anchor

bends.

Anchorage bend bent lingually toe in.

Anchorage bend bent buccally toe out.