1：Where should we place the orthodontic treatment goal?
（１）Practical treatment goal
◆1.Occlusal relation
･１：Mid-line
･２：First molar relation
（Canine relation）
･３：Lower incisal face perpendicular to the occlusal plane
･４：Upper incisal face is
at an angle of 80-82
degrees to the occlusal
plane
･５：The marginal ridge
of lateral teeth is smooth
without steps.
･６：The palatal cusp is 0.5 mm down to the buccal cusp of maxillary molar.
･７：The buccal cusp and lingual cusp of mandible are on the same level.
･８：The frontal view, central incisors,
･ lateral incisors and canines are on a
･ different level and the buccal surface
･ of lateral teeth are almost pararell.
･９：The buccal surface of mandibular
･ lateral teeth goes internally gradually.
･１０：Occlusal view of the arch
･ (Orthoform).
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◆2.Cephalometric goal
･SNA、SNB、ANB
･U-1 to NA, L-1 to NB
･Interincisal Angle
･Mandibular plane
･Occlusal plane
･
･The treatment goal will be the achievable ANB from patients’initial situation
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◆3.Esthetic goal
･The position of the lower incisor and anterior coupling
･Lip line and Smile line
･Vertical dimention
･Gonial angle, Facial height
･Esthetic line
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◆4.Functional goal
･To summarize the cases in order for the maxillary and mandibular teeth bites in centric occlusion when the patients’ mandible is in terminal hinge relation.
･To provide an overbite in order for the molar teeth discludes when sliding the mandible protrusive.
･The canine will disclude the lateral teeth group during lateral movement of mandible.
･There seems to be no problem if the mandible slid protrusive for about 1 mm from CR to CO.
･The flatter the occlusal plane is, the overbite can be small.
･The lateral shifting acts traumatically to teeth, bone tissue and temporomandibular joint.
･No occlusal interference with the opposite tooth during lateral movement of the mandible.
◆5.Stability
･When a treatment is carried out beyond the acceptable limit, the orthodontists always suffer from agony of case relapse after the treatment.
･
ﾐBasic considerations
･1. The lower canine width does not expand : Limitation
･2. It is functioning appropriately
･3.The lower incisors are upright
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Basic consepts of the Level Anchorage System
･１：Practical treatment goal
･２：Vertical Control
･３：Control of the occlusal plane angle
･４：Bounderies and limitation
･５：Anchorage
Tooth Anchorage
�@ Resistance to the move
�A Distance
Anchorage sever
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