The ‘acrylic technique’ to check arch coordination in orthognathic surgery patients

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t p o t i m s b r rch coordination is one of the most important preparatory equirements for orthognathic surgery, the objective being o make certain that the maxillary and mandibular dental rches will fit together well at the time of surgery, with coresponding arch forms and good labial and buccal segment nterdigitation. Inadequate arch coordination can jeopardize he quality of the surgical result. Clinical evaluation of arch coordination can be difficult. n Class II malocclusions, the patient may be asked to posture