Tragedy of begg technique

B.D.C.H. www.indiandentalacademy.com
COUPLE in Vertical plane:

Uprighting spring (vertical
problem)
Flash Player Movie
Buccal Palatal

Torquing auxillary

Torquing auxillary
(Antero-posterior problem)

Cinch-back in Stage III
Mesial

Toe-in Bend
Mesial

Torquing springs (vertical
problem)

Torquing springs (vertical
problem)
Intrusion forces on the posterior teeth especially
the molars
Intrusion force buccal to center of resistance of these
teeth lead to intrusion of buccal cusps
And transverse expansion of posterior teeth
Flash Player Movie

B.D.C.H.
Stage III &
Balancing of the
Forces & Couples
Modification of materials
Design modifications

To overcome the problem of imbalance of
the forces and moments in the anterior
and posterior end of the base archwire it
was suggested to use
Conventional 0.018” or 0.020” Special plus
Refined Begg0.018” or 0.020” Premium wire

Though it’s right to think that such a stiff
wire will prevent bending of archwire, but
still it can rotate within the slot of bracket.

Transverse flexibility of
Stage III base archwire 
You need to find
the file and
correct this link.
And then remove this from
the slide

Design modifications
To prevent the deepening of the anteriors
Bends are given distal to canines and mesial to
canines.
To prevent molar flaring
archwires are constricted
To prevent anchor loss
Class II elastic are used

Stage III arch-wire
A typical Stage III base archwire:
Upper
Lower

In transverse plane
Constriction of upper arch
Toe-in bend
Molar offset bend
In sagittal plane
Cinch-back distal to molar
tube

Gable bend (only)!
Flash Player Movie
WHY?

Effect of vertical forces of uprighting and
torquing springs on the base archwire
These slide is optional,
if not required just delete it!

Counter-effect of the Gable bend:
These slide is optional,
if not required just delete it!

After we have understood the advantages
and side-effects of each individual
components of Begg mechanotherapy, let
us evaluate the whole system.

Uprighting springs + Torquing springs +Uprighting springs + Torquing springs +
gable bends in base archwire =gable bends in base archwire =

Addition of all uprighting springs

Therefore, during stage III all the couples
(moments) are restricted to the anterior
end of the archwire, which causes
generation of the high moments in the
anterior segment,
i.e. the base archwire is loaded with unequal
force systems at either ends.

B.D.C.H.
Solution:
To reduce the auxillary springs
To add couple in the posterior segment

Solution:
• To reduce the auxillary springs (since all
springs create a couple) in the anterior
segment or to add equivalent number
(amount) of the couple in the posterior
segment.

The technique of reduction of the need forreduction of the need for
the couplethe couple in the anterior segment during
stage III will not be discussed here!
However, we are suggesting the second
option, i.e. increasing the moment in theincreasing the moment in the
posterior segmentposterior segment.

But How?
• During Stage I of Begg mechanotherapy
an Anchor BendAnchor Bend just few millimeter mesial
to the molar tube will create:

Distal tipping of the molar
i.e. excellent anchorage tactic.

Extrusion of the molar, more so it’s buccal cusps
because the extrusion force is acting buccal to the
center of the resistance of the molar.
Buccal Palatal

Therefore just by incorporation of the
anchor bend just mesial to the molar tube
(very similar to stage I anchor bend) we
are able to control:
Vertical intrusion forces of the auxiliaries
Anterior pull on the dentition (esp. the
proclination of the upper anteriors)
Transverse problem of flaring of the molars.

• Therefore with a simple biomechanical solution
we are able to avoid the use of Class II elastics
which just adds to the complications of the Stage
III mechanotherapy of Begg.

The typodont pictures
can come here!

“History of Orthodontics is replete with
instances of rediscovering of virtues of concepts
and applications long overlooked, forgotten and
buried under the debris of the so-called new
developments.”
Jayade V.P. “REFINED BEGG FOR MODERN TIMES”

“One often wonders why they were ignored in
the first instance at all.
Was it a deficient understanding on the part
of the multitude, or was it the sheep mentality
to blindly follow a few powerful individuals
who were trying to promote their own interests
by denouncing everything else?”

“Are we not falling in a similar trap when we
are ignoring the Begg appliance?
If we have enough wisdom, we should avoid
repeating the blunders committed in the past by
others.”

Tragedy of begg technique

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