Presurgical orthodontics
Dental Procedures
estimated about CNY 15000-45000
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Description
Orthodontic treatment performed before orthognathic surgery to align teeth and optimize occlusion, facilitating precise surgical correction of jaw discrepancies and improving functional and aesthetic outcomes.
Main Uses
To decompensate dental positions (e.g., uprighting proclined incisors in skeletal Class III), align dental arches for optimal surgical osteotomy fit and stability, establish ideal interarch relationships (overjet/overbite) pre-surgically, eliminate dental compensations masking underlying skeletal deformity, and ensure precise occlusion post-surgery; used exclusively in patients undergoing planned orthognathic surgery (e.g., mandibular advancement, maxillary impaction, bimaxillary osteotomies) after comprehensive diagnosis including CBCT, cephalometry, and dental models.
Normal Range
Not applicable — 'Pre-surgical orthodontics for orthognathic surgery' is not a laboratory test with numerical values; it is a customized, multi-month orthodontic treatment phase involving dental alignment, arch coordination, and occlusal preparation prior to jaw surgery. There are no universal quantitative 'normal ranges'; success is assessed clinically via cephalometric analysis (e.g., ANB angle: 2°–4°, Wits appraisal: −1 mm to +3 mm), model surgery simulation, dental cast measurements (e.g., Bolton ratio: 91.2% ± 1.8% for anterior, 77.2% ± 1.7% for overall), and stable intercuspation without occlusal interferences.
Low Values - Possible Causes
Insufficient tooth movement due to poor patient compliance (e.g., inconsistent elastics or appliance wear), inadequate orthodontic force application or biomechanical planning, root resorption limiting further movement, skeletal resistance (e.g., dense cortical bone or severe skeletal discrepancy), or premature termination of orthodontic phase before surgical readiness.
High Values - Possible Causes
Excessive or uncontrolled tooth movement (e.g., anchorage loss leading to unwanted molar extrusion or tipping), overcorrection intentionally performed to compensate for anticipated surgical relapse or soft-tissue changes, iatrogenic errors in bracket positioning or archwire sequencing, or prolonged treatment duration increasing risk of decompensation or periodontal compromise.
estimated about CNY 15000-45000