cross bite and it's management presentation which is useful for undergraduate students.

1. Management
of Crossbite

2.  According to Graber crossbite is defined as a
condition where one or more teeth may be
abnormally malposed buccally or lingually or
labially with reference to the opposing tooth
or teeth

3.  I. According to their location in the arch
A. Anterior crossbite
1. Single tooth crossbite
2. Segmental crossbite
B. Posterior crossbite
1. Single tooth crossbite
2. Segmental crossbite.

4.  II. Classifi cation of posterior crossbite on
the basis of its presence on one or both
sides of arch.
According to presence of posterior crossbite
on one side or both sides of the arch, posterior
crossbite can be classified into
 1. Unilateral posterior crossbite
 2. Bilateral posterior crossbite.

5.  III. According to the extent of crossbite
1. Simple posterior crossbite
2. Buccal nonocclusion (scissor bite)
3. Lingual nonocclusion.
 IV. Classifi cation of crossbite based on
structure involved.
Crossbite can be classifi ed into following three
types based on structure involved:
1. Dental crossbite
2. Skeletal crossbite
3. Functional crossbite.

6.  Anterior crossbite is a condition, where
mandibular anteriors overlap the maxillary
anteriors
 1. Single tooth crossbite:
Single tooth anterior crossbite is a condition,
where there is overlapping of one of the
mandibular anterior teeth over one of the
maxillary anterior teeth
2. Segmental anterior crossbite:
Segmental anterior crossbite is a condition where
there is overlapping of a group of mandibular
anterior teeth over a group of maxillary teeth

7. a condition where there is an abnormal
transverse relationship between upper and
lower posterior teeth
A. Based on the number of teeth involved
posterior
1. Single tooth posterior crossbite
2. Segmental posterior crossbite

8. B. According to the presence of posterior crossbite
on single or both sides of the dental arch
1. Unilateral crossbite
2. Bilateral posterior crossbite

9. C. based on the extent of crossbite
1. Simple posterior crossbite
2. Buccal nonocclusion (Scissor bite)
3. Lingual nonocclusion

10. D. Crossbites are classified into the following three
types
1. Dental crossbite
2. Skeletal crossbite
3. Functional crossbite

11.  Etiology of Dental Crossbite
I. Anomalies of number of teeth
1. Supernumerary teeth
2. Missing teeth.
II. Anomalies of tooth shape
III. Anomalies of tooth size
1. Microdontia
2. Macrodontia

12.  Etiology of Skeletal Crossbite
I. Habits—Thumb sucking, mouth breathing,
II. Trauma at birth (ankylosis of the TMJ by
forceps injury during delivery).

13. Correction of Anterior Crossbite:
I. Correction of anterior crossbite in the
preadolescent age group
1. Tongue blade

14. 2. Catlan’s appliance or lower anterior inclined
plane

15. 3. Removable orthodontic appliances such as
a. double cantilever spring or “Z” spring
b. Removable orthodontic appliances with
expansion screw

16. 4. Orthopedic appliances:
a. Face mask along with RME
b. Chin cup appliance

17.  5. Myofunctional appliance such as Frankel III
appliance.

18.  II. Correction of anterior crossbite in
adolescents and adults
1. Removable orthodontic appliances with
expansion screw
mini – up to 2 teeth
medium- up to 4–6 teeth
3D screws - anterior crossbite associated
with pseudo class III malocclusion

19. 2. Fixed orthodontic appliances
 correct anterior crossbite involving single
tooth or group of teeth

20. 1. By removable orthodontic appliance, which
are as follows
a. Removable orthodontic appliances with
expansion screw
b. Removable orthodontic appliances with
coffin spring
 Quad helix appliance.

21. 2. By fixed orthodontic appliance
a. Fixed orthodontic appliance with RME
b. Fixed orthodontic appliance with NiTi
expanders
c. Fixed orthodontic appliance with cross
elastics.

23.  Diagnosis is the golden key to success.
 To achieve better treatment finish,
crossbites should be dealt as soon as
detected