1 / 30

Anterior Crossbite

Anterior Crossbite. （ A ） the etiology of Anterior Crossbite. Genetic and congenital factors ： mandibular prognathism Acquired factors ： bad feeding posture the primary canines interference mouth breathing bad habits cleft palate. （ B ） The performance of anterior crossbite.

haig
Download Presentation

Anterior Crossbite

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Anterior Crossbite

  2. （A）the etiologyofAnterior Crossbite • Genetic and congenital factors： mandibular prognathism • Acquired factors： bad feeding posture the primary canines interference mouth breathing bad habits cleft palate

  3. （B）The performanceofanterior crossbite • Malocclusion • Jaw dysplasia and Craniofacial anomalies

  4. （C）Class III presentations In accordance with Pathogenic mechanism • dental • skeletal (Three)： 1 Maxillary involvement :Maxillary Deficiency 2 Mandibular involvement:Mandibular Excess 3 Maxillary and mandibular involvement • Functional

  5. （C）The categories of anterior crossbite • crossbite of dental origin： • Anterior crossbite • Usually class I skeletal pattern Neutrocclusionof molars • Normal soft tissue profile • Anterior teeth can retrude edge to edge • (Convenience shift of mandible)

  6. （C）Categories crossbite of skeletal origin： It is due to excessive mandibular growth，in addition to anterior crossbite，there are obvious mandibular deformity、protrusive、obtuse mandibular angle，class Ⅲ malocclusion；Soft tissue profile is concave-type.A skeletal problem, without the ability to bring the incisors to edge-to-edge.

  7. （C）Categories crossbites of skeletal origin： The skeletal class Ⅲ malocclusion is characterized by mandibular prognathism , maxillary deficiency , or a combination of both.The patients may have a retrusive nasomaxillary area and a prominent lower third of the face , with a reverse overjet.

  8. Peking University, sagittal bone-derived typing

  9. （C）categories crossbite of functional origin ： By factors such as primary canine lack of occlusion wear, or habitual mandibular protrusion caused pseudo-mandibular protrusion. Such patients also have a normal skeletal mandibular pattern，the incisors show negative overjet in CO but touch edge-to-edge in CR.Anterior teeth can retrude edge-to-edge

  10. （C）Categories • According to the relationship between vertical facial points • hyperdivergent , high-angle • hypodivergent , low-angle • average-angle

  11. （D）The differential diagnosis

  12. （E）Treatment planning • characteristic • 1.complexity • 2.timeliness • 3.recrudescence • Crossbite should be treated as soon as it’s discovered，it can be treated successfully through early orthodontic and orthopedic intervention.

  13. （E）Treatment planning Crossbite occlusion: be dental or functional.No matter what reason, early treatment is very important.

  14. a、primary crossbite Treatment ： 1 . Occlusal adjustment：occlusal interference leading to a mandibular shift.Early occlusal adjustment contribute to normal growth and development of the mandible.

  15. a、 crossbiteof primary dentition Treatment ： 2. plate appliance：Can be applicable to primary tooth roots which are still not resorbed entirely，Since the anterior crossbite are caused by the lingual incisors . The plate appliance need enough anchorage, take the advantage of lingual spring push the incisors out in order to correct the crossbite relationship.

  16. a、crossbiteof primary dentition Treatment ： 2. plate appliance：As the primary teeth root labial movement, permanent teeth root will also be with the side to the same direction, guiding the permanent anterior teeth erupt normally.But the correct of the primary dentition crossbite doesn’t mean the treatment of the permanent dentition crossbite.

  17. a、 crossbiteofprimary dentition 3. FR-3 appliance：

  18. b、Mixed-dentition crossbite • dental • skeletal A hand-wrist x-ray can be helpful in assissing whether the patient has substantial growth remaining • Functional

  19. b、 crossbite of Mixed-dentition Treatment ： a. Bite appliance b plate appliance

  20. b、 mixed-dentition Treatment ： 3 protraction appliance：Applicable to patients with maxillary deficiency.The orthopedic facial mask is attached to hooks on a bonded expander by way of strong elastics that produce up to 450 g of force per side. Producing a forward movement of the maxilla.

  21. b、 mixed-dentition Method ： c protraction appliance：Mouth parts Clasp retention Archwire plate hook

  22. b、Mixed dentition crossbite Treatment ： 3 reverse headgear： Facemask Forehead anchorage chin anchorage hook

  23. b、 Mixed dentition crossbite Therapy ： 4. chin cup: anterior crossbite with a relatively normal maxilla and a moderately protrusive mandible can be treated with a chin cup. The force line is directed through the head of condyle，About 400g on each side.

  24. c、 crossbiteof Permanent • Dental • mild skeletal camouflaged orthodontic technique • serious skeletal : orthognathic surgery

  25. c、 Permanent crossbite Treatment method ： 1. fixed appliance： Applicable todental crossbiteand straight profile type，fixed appliance can be used tomove the upper incicors out of crossbite，combination of class III elastics to adjust the arch relationship.

  26. c、 Permanent crossbite Treatment method ： 2. orthodontic – orthognathicsurgery ： class III patients with significant anteroposterior jaw discrepancies that cannot be camouflaged with orthodontic tooth movement will have to be treated surgically.

  27. c、 Permanent crossbite Treatment ： 2. orthodontic – orthognathic surgery： procedure ：Mainly due to bone malformations and remove the existence of compensatory tooth in order to correct the angle the teeth of the jaw. So that the maxillary teeth to the lingual position, mandible teeth to labile potion.

  28. c、 Permanent crossbite therapy： 2.orthodontic – orthognathic surgery： surgery progress ：the maxilla may be brought forward with a lefort Ⅰsurgical osteotomyprocedure or the mandible may be set back with a bilateral sagittal split osteotomy, also can be at the same time do either maxillary and mandible surgery.

  29. Summary Anterior crossbite Dental skeletal functional Primary dentition Mixed-dentition Permanent dentition

More Related