1 / 67

Function appliance

Function appliance. Xi ’ an Jiao tong University Stomatology Hospital Orthodontic Division Wang Xiaorong. 1. The basic concept.

avi
Download Presentation

Function appliance

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. Function appliance Xi’an Jiao tong University Stomatology Hospital Orthodontic Division Wang Xiaorong

  2. 1.The basic concept • Function appliance：Itself does not produce any mechanical power, its role is changing the orofacial muscle function together to promote development of craniofacial growth, in order to correct the mistake in the formation of malocclusion.

  3. The features of function appliance • The impact of the use of dental and skeletal muscle • Upper and lower dentition open bite separation • Lower jaw forward (or backward) shift • When swallowing, the lower lip close • Selective changes in the tooth eruption Road • Does not affect the eruption of permanent teeth and replacement

  4. The development of function appliance • In 1726, the French doctor Fauchard first use expansion. • 1771 England surgeon Hunten, the first analysis of the mandibular growth • 1879, the United States, "the father of Orthodontics" Kingsley, the design of a typical occlusal appliance leaps and bounds, and guide the mandibular forward, established the idea of treatment of mandibular forward.

  5. The development of function appliance • 1880, published an article, the inclined plane treatment of mandibular retrusion deformities, carried out functional appliance precedent. • 1908-1936, Denmark and Germany Haupl of Andresen long-term cooperation and invented activator system • 1951, Stockfisch designed Kinetor appliance. Functional appliance with the expansion of the combination of helical spring. Function of the maxillofacial region had a significant impact on orthopedics.

  6. The development of function appliance • Balters designed Biology regulator in 1960. • Frankel has designed functional regulator in 1967. • In late 80's our country are carrying out the functional orthopedic treatment.

  7. Principle of Functional appliance • To the mouth and maxillofacial muscle function to stimulate and guide the bone growth of periodontal ligament receptors in biological regulation, mobilization of the growth potential, to achieve the purpose of correction.

  8. Principle of Functional appliance • Correction does not in itself have any power, but perioral muscle contractile force, passing through the appliance to the temporomandibular joint, jaw, teeth, bone and other parts, so that deformities have been corrected

  9. Principle of Functional appliance • Recoverable through the appliance and lip cheek genioglossus muscle coordination between the power to make happen and maxillofacial soft tissue reconstruction, the re-establishment of function and form a balance between the power to the treatment of dentofacial deformity prevention purposes.

  10. Muscle Change • Treatment, change the tone of facial muscles on the teeth and bones by the application of force size, direction and time, so I noodle region neuromuscular jaw environment is conducive to development and craniofacial growth. • When caused by swallowing mandibular muscle contraction contribute to the establishment of normal swallowing tooth contact.

  11. Muscle Change • Appliance because of retention in the mouth lax, swallowing must rely on the tongue to maintain its position, the location of the tongue back to normal • Emphasize the treatment of lip closure, lip changed the location and activity • Is a muscle training device.

  12. Change of teeth and alveolar • Selectively control the vertical height of the teeth • Inhibit anterior, promote eruption of posterior teeth, to correct deep overbite

  13. Change of teeth and alveolar • Inhibition of posterior teeth, promoting tooth eruption before the correction of anterior open together. • Vertical eruption of the teeth at the same time, you can guide them in the near distal direction, to do a small amount of buccolingual movement.

  14. Indication • Before peak period of growth and development (for the early permanent dentition ） • Upper and lower jaw development is not transferred • Functional types of malocclusion

  15. Contraindication • Crowding, misplaced teeth, extraction cases • Uncooperative patients

  16. The advantages of functional appliance • The unity of form and function, treatment stability and time is short • Exert the body growth and development potential and development of the forces of nature • With fixed appliance used in conjunction, can simplify the second phase of treatment, to a certain extent to avoid extract teeth and orthognathic surgery, so that a more stable therapeutic effects

  17. Treatment procedures • Diagnosis • Design • Occlusal reconstruction • Craft Room production

  18. Clinical treatment • Try to wear • Treatment period • Holding period • Post-treatment

  19. 2. Categories • easy：oblique derivative, lip block, vestibular shield • Activator Class：Activator、 Twin-block 、 Bionator、 Herbst . • Frankel appliance

  20. Commonly used functional appliance • oblique derivative, lip block, vestibular shield • Activator • Frankel II III

  21. Activator Design by Andresen.. Advance the mandible several millimeters for Class Ⅱ correction.

  22. Indication Growth and development of children Class Ⅱ bone (mandibular retrusion, mild maxillary protrusion) Patients with good cooperative

  23. Appliance structure and production • Maxillary component Plastic part：baseplate Metal parts: Transverse palatal bar labial bow

  24. Mandibular component One whole side of the tongue base, enveloping the anterior labial to 2-3mm

  25. baseplate The original functional appliance design was a block of plastic covering the teeth of both arches and the palate.

  26. Wax Record Hop The amount of mandibular advancement overjet < 6mm，guide to cut to cut overjet > 6mm，guide in several times

  27. Open vertical volume Interest only on the basis of combined space and continue to open 3 - 5mm • On the mandibular midline to be consistent

  28. Wear appliance • Wear appliance every day of not less than 12 - 14 hours in rest time and evening 8 - 10-month active treatment period Maintain one and a half years

  29. activator • Angle II 1 Classification (wearing appliance into) lower jaw forward and downward (muscles by stretch and fatigue) muscle reflex to pull back in situ mandibular (upper and lower body because of this backward force on inhibition of maxillary dental arch forward development) overlapped anterior occlusal normal

  30. Role and the principle Mandibular protrusion Tatsu neutral relations of posterior teeth Front teeth overjet the normal occlusal

  31. Referral should pay attention to • Inspect influention second molar eruption and primary and permanent teeth to replace the plastic part • Whether or not to loose bow lips • Tooth surface and plastic noodle mediated the relationship between the buffer • Check active mandibular protrusion case

  32. the function of Activator • Improvement Class II molar relationship • Reduce overbite and overjet. • To improve the noodle type II category • Backward upper anterior • Forward under anterior • Mandibular rotation after

  33. function regulator，FR • It was designed by German R. Frankel in 60's the 20th century, so is also known as the Frankel appliance.

  34. principle • FR a major role at the oral part of the vestibular area • Used appliance retain lip, cheek screen blocked lips, cheek muscle, so that the developing dentition avoid abnormal perioral muscle function

  35. principle • So that the dental arch, mandible length, width and height on three bearings to maximize development • Lip shield, buccal vestibular sulcus screen can pull Department periosteum to stimulate the growth of the Department of alveolar bone

  36. FR I • The appliance is utilized to promote transverse arch development both dentally and skeletally.this is accomplished by the vestibular shields removing external muscle pressure from both the maxillary and mandibular arches.Its also effective for interruption of abnormal mentalis function and promote facial development.

  37. FR II • The FR II will also accomplish transverse and vertical development of both the maxillary and mandibular arches.

  38. FR III • This appliance is used to aid in the correction of Class III malocclusions. This can be achieved by retarding further development of the mandible while simultaneously allowing for the development of the maxilla to its fullest growth potential.

  39. FR IV • This appliance is used exclusively in Class I malocclusions where skeletal open bite,arch width deficiency,or abnormal muscle function are present.

  40. FR V • It is a modification of the FR II and as such is intended for Class II malocclusion,particularly in cases where an increase in vertical dimension is undesirable.It is often used in conjunction with extraoral traction devices.

  41. FRⅢ Indication Functional Class Ⅲ is caused by such factors as muscular disorders, bad habits, tongue, or interference. Mild skeletal class Ⅲ, maxillary hypoplasia, normal or mild mandibular protrusion, mandibular incisor to retreat to on the edge, with a favorable growth pattern, no obvious genetic history.

  42. Bionator Indication Mixed dentition Class Ⅱ Division 1, maxillary development of normal, functional mandibular retrusion, position on, the development of normal or mildly inadequate Noodles 1 / 3 short or normal mandibular advancement significantly improved after the type

  43. twin block • It is plastic • Upper and lower occlusal contact pad combined into a 45 'angle

  44. All mattress covers on the second molars and premolars together noodle, and in the second premolar in the near edge of ridge formed in the inclined plane to the near, inclined plane and combined into a 45 'angle • All coverage under the pad surface premolar area together in the second premolar distal marginal ridge formed in the far 45 'of slope • All pads in the upper and lower second premolar area 45 'slope of the relationship between occlusal contacts and keep guide to the mandibular protrusion at the location.

  45. Forsus Forsus appliance is a fixed appliance and common use, rapid correction of malocclusion Angle Ⅱ combined functional appliance. It can be seen as a Herbst appliance and the Jasper Jumper appliance improvements, can produce sustained, light elastic, so that the mandibular oral function in a different state at the protrusion, and mandibular growth stimulation.

  46. Indication 1）Functional and early bone malocclusion 2）Angle Ⅱ - maxillary protrusion and normal or mildly, moderately incisor on the lip following dump 3）Angle III - mandibular who can back on the edge.

  47. extraoral anchorage appliances • To oral external head, pillow, neck, places, submental extraoral structures such as the anti-base • Orthodontic tooth movement for three-dimensional movement on the mandibular inhibit or promote the growth and development, to change the direction of bone growth to provide sufficient anchorage capacity

  48. Categories • Rear traction • Vertical Traction • Front traction

  49. Rear traction appliance • Backward force used to make teeth move or inhibit distal alveolar, mandibular forward growth of extraoral anchorage appliance device • Mainly include the face-bow, J-hook headgear

  50. reverseheadgear To the amount of pads, chin pocket as composite parts Anchorage Traction stent as a mask to connect components Activity or as a fixed appliance within the mouth piece

More Related