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Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
Twin block    /certified fixed orthodontic courses by Indian   dental academy
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Twin block /certified fixed orthodontic courses by Indian dental academy

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The Indian Dental Academy is the Leader in

continuing dental education , training dentists

in all aspects of dentistry and offering a wide

range of dental certified courses in different

formats.

Indian dental academy provides dental crown &

Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit

www.indiandentalacademy.com ,or call
0091-9248678078

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  • 1. INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  • 2. www.indiandentalacademy.com
  • 3.  INTRODUCTON  DEVELOPMENT OF TWIN BLOCKS  APPLIANCE DESIGNS & CONSTRUCTIONS  TWIN BLOCK TECHNIQUE  MODE OF ACTION  TREATMENT BY TWIN BLOCK TECH  CONCLUSION  REFERENCESwww.indiandentalacademy.com
  • 4. www.indiandentalacademy.com
  • 5. NECESSITY IS THE MOTHER OF INVENTION  First twin block app : 1977, to 8ys old patient.  First patient : Colin Gove.  First fabricated : Jim Watt. www.indiandentalacademy.com
  • 6. Comfort Esthetic Function Patient compliance Facial appearance Speech Clinical management www.indiandentalacademy.com
  • 7. Arch development Mandibular repositioning Vertical control Facial asymmetry Safety & efficiency Integration with fixed appliance Treatmentwww.indiandentalacademy.com of TMJ dysfunction
  • 8. BITE REGISTRATION STANDARD TWIN BLOCK OCCLUSAL INCLINED PLANES www.indiandentalacademy.com
  • 9. BITE REGISTRATION  It is a crucial factor in design & construction.  It determines the degree of activation built in to the appliance.  The degree of activation should stretch the muscles of mastication sufficiently to provide the possitive propriocepive response.  Consideration is given to facial growth pattern. www.indiandentalacademy.com
  • 10. BITE REGISTRATION STEP WISE ADVANCEMENT Vs SINGLE STEP ADVANCEMENT A study was done to identify the pattern of bone formation in tmj in response to the step wise mandibular advancement compared to single step advancement with fixed functional appliances . They concluded that step wise advancement produces more skeletal effects than single advancement and more prominent effect with step wise advancement was found in the glenoid fossa compared with the condyle. ( Semin Orthod 2003:9:41-46) www.indiandentalacademy.com
  • 11. BITE REGISTRATION IN TWIN BLOCK TECH VERTICAL ACTIVATION. AND CONTROL OF VERTICAL DIMENSION. www.indiandentalacademy.com
  • 12. BASIC COMPONENTS CONTROVERSIES REGARDING LABIAL BOW www.indiandentalacademy.com
  • 13. DELTA CLASP BALL END CLASP &BASE PLATE www.indiandentalacademy.com
  • 14. OCCLUSAL INCLINED PLANE  Active component of twin block .  Occlusal forces are in the range of 400 – 500gms www.indiandentalacademy.com
  • 15. STAGE I : ACTIVE PHASE ( 6-9 MONTHS) STAGE II : SUPPORTIVE PHASE ( 3-6 MONTHS) RETENTION : UPPER ANT INCLINED PLAN ( 9MONTHS) www.indiandentalacademy.com
  • 16. STAGE I : ACTIVE PHASE ( 6-9 MONTHS) www.indiandentalacademy.com
  • 17. STAGE II : SUPPORTIVE PHASE ( 3-6 MONTHS) www.indiandentalacademy.com
  • 18.  It can be done by cold cure acrylic or preformed heat cure block.  No acrylic is added to the lower inclined plan. www.indiandentalacademy.com
  • 19.  Central control of adaptive response &Neuromuscular & skeletal adaptations. ( McNamara , 1980 )  Adaptation of bone growth in response to functional stimulus. ( Wood side et al , 1987 ) www.indiandentalacademy.com
  • 20.  A comparison of twin block response with animal experiments. (Harvold)  A review of paradigm of genetic control ( Petrovic et al , 1981 )  Improved clinical use of twin block & herbst as a result of radiating viscoelastic tissue forces on the condyle & fossa in treatment & long term retention : growth relativity. ( Voudouris et al :ajo do:2000:117:247-66.) www.indiandentalacademy.com
  • 21. 1.TREATMENT OF CLASS I DIV I WITH DEEP BITE. EXACTO BITE A. BITE REGISTRATION. PROJET BITE GUAGE B. TEMPORARY FIXATION OF TWIN BLOCK C. COMFORT ZONE D. MANAGEMENT OF DEEP OVERBITE. www.indiandentalacademy.com
  • 22. 2. TREATMENT IN MIXED DENTITION www.indiandentalacademy.com
  • 23. 3.COMBINATION THERAPY IN PERM DENTITION INTEGRATION OF TWIN BLOCK WITH FIXED APPLIANCES www.indiandentalacademy.com
  • 24. 4. TWIN BLOCK TRACTION TECH  In the treatment of severe maxillary protrusion.  To control vertical growth pattern.  To intrude upper posterior teeth.  In adult treatment where mandibular growth cannot assist correction of severe malocclusion. CONCORDE FACEBOW www.indiandentalacademy.com
  • 25. 5.TREATMENT OF ANT OPEN BITE  Etiology.  C / F of ant open bite.  Appliance modifications. www.indiandentalacademy.com
  • 26. 6. TREATMENT OF CLASS II DIV II MALOCCLUSION  C/F.  Bite registration.  Appliance design. Sagittal appliance www.indiandentalacademy.com
  • 27. 7. TREATMENT OF CLASS III MALOCCLUSION Reverse twin blocks www.indiandentalacademy.com
  • 28. 9. MANAGEMENT OF CROWDING & EXTRACTION THERAPY  Extraction & Functional therapy are contra indicatory terms.  Indications in certain cases. a. Severe crowding. b. Vertical growth pattern with crowding. www.indiandentalacademy.com
  • 29. 10. TREATMENT OF FACIAL ASYMMETRY SAGITTAL TWIN BLOCK IS THE APPLIANCE OF CHOICE. www.indiandentalacademy.com
  • 30. 11.MAGNETIC TWIN BLOCKS  To accelerate correction of arch relationship.  To encourage increased occlusal contacts on the bite blocks & to maximise favourable forces applied to correct malocclusion.  Attracting magnets : Samarium cobalt & Neodynium boron. www.indiandentalacademy.com
  • 31. 11.MAGNETIC TWIN BLOCKS Author has used magnets in FIVE different clinical situations 1. 2. 3. 4. 5. Cl II div 1 with large overjet. Mild Cl II buccal segment relationship. Mild Cl II div 1 with overjet 7mm. Unilateral Cl II adult patient with TMD. Skeletal Cl III with persistent cross bite failed to resolve with conventional mechanics. 6. Treatment of facial asymmetry. www.indiandentalacademy.com
  • 32. 12.TWIN BLOCK IN TMJ THERAPY       C / F. Diagnosis. Goals of TMJ therapy. Appliance design. Stages of treatment : 1.Sagittal development 2.Functional Repositioning 3.Vertical development Biofinisher. www.indiandentalacademy.com
  • 33. 13. FIXED TWIN BLOCKS www.indiandentalacademy.com
  • 34. 13. FIXED TWIN BLOCKS  Advantages of fixed appliances  Esthetic appliance design.  Stages of treatment. 1. Interceptive treatment & arch development by the Wilsons modular appliance system. 2. Orthopaedic treatment by fixed twin blocks. 3. Detailed orthodontic correction by fixed appliance. www.indiandentalacademy.com
  • 35. Twin Block is versatile removable functional appliance used to treat various types of malocclusions. Having knowledge about the Twin Block and its various modifications with proper case and appliance selection successful results can be obtained. www.indiandentalacademy.com
  • 36. 1. Twin Block Functional Therapy, by William J Clark. 2. Orthodontics & Dentofacial Orthopedics by McNamara & Brudon. 3. Dentofacial Orthopedics with Functional Appliances by Graber , Rakosi & Petrovic. 4. Orthodontics Current Principles & Techniques by Graber , Vanarsdall. 5. Removable Orthodontic Appliances by Graber & Neumann. 6. Am J Orthod Dentofacial Orthop :2000:117:247-66. 7. Semin Orthod : 2003:9: 41-46. www.indiandentalacademy.com
  • 37. www.indiandentalacademy.com

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