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Published byArmani Brien Modified over 10 years ago
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FIXED ORTHODONTIC APPLIANCES DENT 657
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Removable vs. Fixed Appliances REMOVABLE n Tipping only n No control over root movement n Pts co-operation n Hygienic FIXED n Bodily translation n Control of root movement n Less dependent on pts co-op n Less hygienic
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DEVELOPMENT OF FIXED ORTHODONTIC APPLIANCES
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Development of Fixed appliances n Early fixed appliances n Late 1800s n Edward Angle
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EARLY FIXED APPLIANCES
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Development of Fixed appliances n Standard Edgewise appliance n Early 1900s
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Development of Fixed appliances n Pre-adjusted edgewise appliance n 1970s n Refined manufacturing process with built- in adjustments specific for each tooth n Advances in material sciences made attachment much smaller
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BANDED APPLIANCES
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Bonding to Enamel
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Bonding Surface - Bracket Base
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BONDED APPLIANCES
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Lingual Appliance
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CERAMIC APPLIANCES
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Self Ligating Appliance
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PASSIVE FIXED APPLIANCES
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Components of the Fixed Appliance n Bands n Molar Tubes n Brackets n Buccal Tubes n Arch Wires n Auxiliaries: Elastomeric products, Coil springs, Lingual arches, Extra-oral appliances
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Posterior attachments n MOLAR TUBES
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Components of the Fixed Appliance n Bands n Molar Tubes n Brackets n Arch Wires n Auxiliaries: Elastomeric products, Coil springs, Lingual arches, Extra-oral appliances
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Anterior Attachments n Brackets
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Components of the Fixed Appliance n Bands n Molar Tubes n Brackets n Arch Wires n Auxiliaries: Elastomeric products, Coil springs, Lingual arches, Extra-oral appliances
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ARCH WIRES n Maxillary and mandibular n Arch form described as parabolic shaped n Size and cross-section of wires vary n Material varies eg. Nickel Titanium alloy (NiTi), Titanium Molybdenum Alloy (TMA), Stainless Steel
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Components of the Fixed Appliance n Bands n Molar Tubes n Brackets n Arch Wires n Auxiliaries: Elastomeric products, Coil springs, Lingual arches, Extra-oral appliances
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Elastics
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EXTRA ORAL FORCES - HEAD GEAR
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Coil Spring Closed or open coil springs
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Pre-Adjusted Edgewise Appliance or The Straight Wire Appliance n Larry Andrews - studied normal occlusion and individual tooth positions n Developed prescriptions for individual tooth position n Elements of ideal tooth position are built into the appliance n Minimizing active wire manipulation - The Straight Wire Concept
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Pre-adjusted edgewise appliance n First order / in-out - Horizontal plane n Second order / tip - Mesio-distal angulation n Third order / torque - Labio-lingual angulation 3 - Dimensional control of tooth position
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First order or In-out
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Pre-adjusted edgewise appliance n First order / in-out - Horizontal plane n Second order / tip - Mesio-distal angulation n Third order / torque - Labio-lingual angulation
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Second order or Tip 4
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Pre-adjusted edgewise appliance n First order / in-out - Horizontal plane n Second order / tip - Mesio-distal angulation n Third order / torque - Labio-lingual angulation
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Third order or Torque 4 To Torque is the least efficient tooth movement using orthodontic appliances
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Significance of accurate bracket/band positioning n Precise tooth positioning n Optimal effect of pre-adjustment n Occlusion n Esthetics n Stability
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POSITIONING BRACKETS - GENERAL INSTRUCTIONS Rhomboidal shape Disto-lingual wing mark Central scribe line (long axis)
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Maxillary Central Incisors 4 4
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Maxillary Lateral Incisor 3.5
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Maxillary Cuspids 4.5 4.5 mm
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Maxillary Bicuspids
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Mandibular Incisors
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Mandibular Cuspid
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Mandibular Bicuspids
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Maxillary first molar bands
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Mandibular first molar bands
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