iDentistry The Journal September-December 2017 | Page 4

The Journal
*Dr. Abhishek Sharma
**Dr. Kavita
Two-phase treatment of skeletal class II Malocclusion
using Forsus FRD : A case report
Growing skeletal class II malocclusions with mandibular deficiency have been treated for more than a
century with different types of functional appliances. To demonstrate the efficacy of Forsus Fatigue
Resistant device in the management of class II malocclusion. A patient having Class II division 1
malocclusion with functional jaw retrusion was treated using Standard Edgewise 018 prescription
and Forsus FRD appliance. Pre-treatment, mid-treatment and post treatment photographs were
taken. Cephalometric analyses were done. Stable and successful results with improvement in facial
profile, skeletal jaw relationship were achieved. Forsus gives good results in non extraction class II
malocclusion.
Introduction
Class II Correction is a common orthodontic
case requirement. Treatment of class II
malocclusion has always been an enigma to the
orthodontic faternity. Skeletal class II
malocclusion has been treated by various forms
of functional appliances to achieve better
esthetics and functional harmony (Pancherz,
1979) [1] . Correction of class II malocclusion by
growth modulation during active growth can be
achieved using various myofunctional
appliances like activator, Frankel’s regulator
[2]
and the twin block (Beckwith et al, 1999) . To
avoid the need for patient compliance in such
therapy, a number of fixed interarch appliances
[3]
have been developed, including the Herbst .
Disadvantages of the Herbst appliance include
the rigidity of the mechanism, the tendency of
the appliance or its support system to break,
and the requirement for complex laboratory
work [4] .
The Forsus Fatigue Resistant Device (FRD) is
an alternative interarch appliance for treating
Class II malocclusion. It is an is an interarch
push spring that produces about 200g of force
when fully compressed [5] . A mandibular push
rod attaches directly to the lower archwire distal
to the canines, and a telescoping spring
attaches to