Fixed appliances II. Dr. Káldy Adrienn, Semmeweis University

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1 Fixed appliances II. Dr. Káldy Adrienn, Semmeweis University

2 Head gear/facebow Delair mask/ face mask Fixed Class II. correctors Lip bumper Eva plate Nance appliance Pearl appliance Habbit crib

3 Applied forces in orthodontics Orthodontical forces dentoalveolar part periodontium Orthopedical forces (cementum, periodontal ligament, alveolar bone, gum) intraoral forces dental jaws maxillary bone sutures, caput mandibulae and symphysis extraoral forces

4 Classification I. Extra- and intraoral Intraoral : Lip Bumper, ClassII correctors, Eva plate, Nance appliance, Pearl appliance Extraoral( connteced to an intraoral part): -Headger, Delaire- mask

5 Classification II. Dentition: -Mixed dentition (Headgear, Delair mask, Pearl, Herbst, Habbit crib, Lip Bumper, Nance appliance) -Permanent dentition ( Headgear, Forsus appliance,eva plate, Nance appliance ) Fixed -Nance, Class II correctors, Habbit cribs, Removable - headgear, Delaire-mask, Lip bumper

6 Extraoral forces - Headgear, Delaire mask

7 Extraoral forces - Headgear Can decrease the sagittal growth of the maxilla can rotate the maxilla forward and backward can push(slide) the dental arch in the maxillary bone can rotate the upper occlusal plane can distalise, extrude, intrude, back and front tilt the 6th reinforce the anchorage can be attached to removable or appliances too fixed (Headgear tube)

8 Headgear Effects: -dentoalveolar adaptation(periosteum, proc.alveolar ) -skeletal adaptation ( sutures) Forces: -orthodontic ( tooth moving ) periosteal ligaments -orthopaedic ( jaws )force is appled to the teeth for transmission to the sutures ( more teeth in one block)

9 Extraoral forces - Headgear Parts of the headgear: facebow rubber stripes modules

10 Extraoral forces - diversity in the parts of the Headgear Occipital pull Cervical pull

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12 Selection of headgear 1. Anchorage location-facial pattern headgear) -headcap superipor and distal force(high-pull -neckstrap-inferior and distal force ( cervical pull)

13 Selection of headgear 2. How to attache to the dentition? -Fixed applaince, tubes on the permanent first molars ( to correct the classii malocclusion by restarining the growth of the maxilla) -Removable appliance, splint or functional appl (children with vertically excesive growth )

14 Selection of headger 3. What kind of tooth movement is desired? Line of force moovement through the center of resistance Line of force above or below to this pont tipping bodily

15 Extraoral forces - tooth moving with Headgear Moving the 6ths Decrease the maxillary growth

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17 Extraoral forces - tooth and bone moving with Headgear rotating the jaw and the teeth

18 Extraoral forces - tooth and bone moving with Headgear Base of the succes - the direction of the pulling High/low pulling Can be combined

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27 Extraoral forces - some useful notes about Headgear Daily wearing time cca.14 hours Very effective in Angle class II. Not only sagittal but also vertical treatment Have use it carefully - injuries during the night eye If the indication is only anchorage reinforcement - we can use orthodontical implant

28 Extraoral forces - Delaire mask/face mask/ Reverse headgear Can increase the growth of the maxilla Can mesialise the maxilla Lean against chin and forehead Skeletal effect - young age Very useful in Angle class III. Can be effective in cleft palate treatment

29 -Maxillary deficiency and mandibular excess ( better with true maxillary problems, not combinated) -Move the maxilla into a more anterior position -Bone is added at the posterior and superior sutures -Usually after transverse expansion -Up to the age of 10 -Force is applied to the teeth for transmisson to the sutures -Obtains anchorage from the forehead and chin -Elastics attach to a maxillary appliance,maxillary teeth should be splinted together

30 10-year-old girl with maxillary deficiency

31 Small, posteriorly positioned maxilla

32 Cephalometric analysis

33 After expansion Splint Hyrax with hooks Protraction with Face mask Tooth movement and skeletal changes grams per side for 1214 hours per day

34 After 8 weeks of Face mask treatment

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37 Both anterioposterior and vertical maxillary deficiency To move the maxilla into a more anterior and inferior position wich also increases its size

38 Class II. correctors -to correct the distalbite by pulling the mandible into a protruded position -the jaw repositioning is passive -force transmitted to the temporomandibular joint -condyle translates forward away from the temporal bone -the temporomandibular joint remodels posteriorly(bone is added to its posterior area) and the mandible is growing longer -both skeletal and dental effects

39 About timing

40 Indication Class II/1 Class II/2

41 Herbst appliance -fixed with bands -very effective in altering jaw growth and eliminate overjet -full-time action -no need of patient cooperation months -after a positive response it is possible to reactivate by increasing the tube lenght

42 Sideeffects Distalization and intrusion of the upper first molars anchorage Proclination of the lower incisors Loss of

43 Forsus appliance -used with fix appliance -connected to the head gear tubes of the first upper molar s band and to the lower arcwire between the brackets of the canine and first premolar -telescope part is active with closing

44 Liberty Bielle appliance Applied with braces Jusper Jumper applaince

45 Skeletal and dental effects: -posture the mandible forward -increase SNB, decrease ANB -distalize the upper teeth -eliminate the overjet -changes in the profile

46 Lip Bumper appliance -a labial appliance fitted to the tubes of the bands of the lower molars -constructed of 0,045 sst wire bow fitting to the lower arch and acrylic pad in the vestibulum -space regainer, holds the lee-way space -reduce the pressure of the lips -changes the muscle balance -eliminates the anterior crowding

47 Lip Bumper appliance -the plastic shield positioned facial to the incisor crowns without touching them -also used for moderate transversal expansion -periodically it needs to be advanced

48 presses against the lips alters equilibrium of forces between lip and tounge transmits force to move the molars posteriorly forward movement of the incisors Increase arc lenght

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51 12.

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53 Eva platte -used with fix appliance -in deep bite cases to correct the deep bite and avoid the loss of brackets -fitted to the palatinal tubes of the upper molars (0,045 sst wire bow) -acrylic pads in the front palatal area -intruding the lower incisors -extruding the premolars and molars

54 Nance appliance -the palatal vault provides increased anchorage - -Acrylic button in the palatal vault Wire bow Molar bands maintane the molar position while alignement of anterior teeth is completed - Extraction cases - Soft tissue irritaion

55 Bad oral habits, disfunctions Functional Influences on Dentofacial Development Respiratory pattern-mouth breathing Thumb, finger sucking Tonge thrusting, abnormal swalloing

56 Ujjszopó gyermek Effects of thumb sucking

57 Habit crib- habit breaking appliances -cemented to primary or permanent molars with bands -extended anteriorly -0,028-0,036 wire bow -remind to interrupt a finger sucking habbit -retrain thr toung -interfer with the finger position during sucking -good for toung thrusting -trains the tongue to rest in its normal superior position

58 Pearl appliance Effective in cases with functional insufficiency -spinning the pearl at least 20 times a day -retrain the toung, correct the speech

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