Crossbite management santosh (2)

Management Of CrossbiteManagement Of Crossbite

Department of Orthodontics, Mamata Dental College, KhammamDepartment of Orthodontics, Mamata Dental College, Khammam
DefinitionDefinition
A condition where one or more teeth may beA condition where one or more teeth may be
abnormally malposed bucally or linguallyabnormally malposed bucally or lingually
or labially with reference to the opposingor labially with reference to the opposing
tooth or teeth.tooth or teeth.
 It is the term used to describe abnormal occlusion inIt is the term used to describe abnormal occlusion in
the transverse plane.the transverse plane.
www.indiandentalacademy.comwww.indiandentalacademy.com

ClassificationClassification
 Based on the location:Based on the location:
1.1. Anterior CrossbiteAnterior Crossbite
a)a) Single toothSingle tooth
b)b) SegmentalSegmental
2.2. Posterior CrossbitePosterior Crossbite
a)a) UnilateralUnilateral
b)b) BilateralBilateral
 Based on the nature of the Crossbite:Based on the nature of the Crossbite:
1.1. Skeletal CrossbiteSkeletal Crossbite
2.2. Dental CrossbiteDental Crossbite
3.3. Functional CrossbiteFunctional Crossbite

Anterior CrossbiteAnterior Crossbite
 Defined as a malocclusion resulting fromDefined as a malocclusion resulting from
the lingual positioning o the maxillarythe lingual positioning o the maxillary
anterior teeth in relationship with theanterior teeth in relationship with the
mandibular anterior teeth.mandibular anterior teeth.

Single tooth
anterior
Crossbite
ANTERIOR CROSSBITE
Segmental
Crossbite

Posterior CrossbitePosterior Crossbite
 Refers to abnormal transverse relationshipRefers to abnormal transverse relationship
between the upper and lower posterior teeth.between the upper and lower posterior teeth.
 Mandibular buccal cusps occlude buccal to theMandibular buccal cusps occlude buccal to the
maxillary buccal cusps, instead of occluding inmaxillary buccal cusps, instead of occluding in
the central fossae of the maxillary posteriorthe central fossae of the maxillary posterior
teeth.teeth.

Posterior CrossbitePosterior Crossbite
Unilateral CrossbiteUnilateral Crossbite
Bilateral CrossbiteBilateral Crossbite
Buccal non-occlusionBuccal non-occlusion
(SCISSORS BITE)(SCISSORS BITE)
Lingual non-occlusionLingual non-occlusion
Normal transverse relationshipNormal transverse relationship

Skeletal CrossbiteSkeletal Crossbite
 Associated with a discrepancy in the sizeAssociated with a discrepancy in the size
of the maxilla and the mandible.of the maxilla and the mandible.
 Usually as a result of retarded maxillaryUsually as a result of retarded maxillary
growth or a maxilla that is backwardlygrowth or a maxilla that is backwardly
positioned.positioned.
 Can also occur as a result of excessiveCan also occur as a result of excessive
mandibular growth.mandibular growth.
 Skeletal posterior cross bites are usuallySkeletal posterior cross bites are usually
characterized by a narrow upper arch.characterized by a narrow upper arch.

Skeletal CrossbiteSkeletal Crossbite

Dental CrossbiteDental Crossbite
 Localized conditions where one or moreLocalized conditions where one or more
teeth are abnormally related to that of theteeth are abnormally related to that of the
opposing arch.opposing arch.
 Causes—Causes—
Lingual eruption path of maxillary anteriors.Lingual eruption path of maxillary anteriors.
Trauma to the deciduous dentition in which there isTrauma to the deciduous dentition in which there is
displacement of the tooth buds.displacement of the tooth buds.
Delayed eruption of the deciduous teeth.Delayed eruption of the deciduous teeth.
Supernumerary teeth.Supernumerary teeth.
Tooth material arch length discrepancies.Tooth material arch length discrepancies.

Dental CrossbiteDental Crossbite

Functional CrossbiteFunctional Crossbite
 Occlusal interferences.Occlusal interferences.
 Habitual forward positioning of theHabitual forward positioning of the
mandible.mandible.
 Acquired muscular reflex pattern duringAcquired muscular reflex pattern during
jaw closure.jaw closure.

Etiology of CrossbiteEtiology of Crossbite
1.1. Persistence of a deciduous tooth.Persistence of a deciduous tooth.
2.2. Crowding and Abnormal displacement ofCrowding and Abnormal displacement of
one or more teeth.one or more teeth.
3.3. Pressure habits resulting in loweredPressure habits resulting in lowered
tongue position.tongue position.
4.4. Retarded development of maxilla inRetarded development of maxilla in
sagittal as well as transverse direction.sagittal as well as transverse direction.

Etiology of CrossbiteEtiology of Crossbite
5.5. Narrow upper arch.Narrow upper arch.
6.6. Collapse of the maxillary arch.Collapse of the maxillary arch.
7.7. Sagittal discrepancies of the jaws.Sagittal discrepancies of the jaws.
8.8. Unilateral hypo or hyperplastic growth ofUnilateral hypo or hyperplastic growth of
any of the jaws.any of the jaws.

Treatment of Anterior CrossbiteTreatment of Anterior Crossbite
 Tongue blade therapy.Tongue blade therapy.
 Catlan’s appliance.Catlan’s appliance.
 Double cantilever spring (Z Spring).Double cantilever spring (Z Spring).
 Reverse head gear.Reverse head gear.
 Fixed appliance.Fixed appliance.

Treatment of Posterior CrossbiteTreatment of Posterior Crossbite
 Crossbite elastics.Crossbite elastics.
 Coffin spring.Coffin spring.
 Quad helix.Quad helix.
 RME.RME.
 Removable plates.Removable plates.
 Fixed appliance.Fixed appliance.

BibliographyBibliography
1.1. ORTHODONTICS – THE ART AND SCIENCEORTHODONTICS – THE ART AND SCIENCE
2.2.TEXT BOOK OF ORTHODONTICSTEXT BOOK OF ORTHODONTICS

Crossbite management santosh (2)

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