Fig. 2

Patient is shown in natural head position. The oral retractors are in situ, and a plumb line is evident hanging to the patient’s right side, which acts as a guide to the true vertical line. A transverse cant of the maxillary occlusal plane, down on the patient’s right side, is evident. The patient may be positioned in a cephalostat as demonstrated here, though this is not mandatory, and for most patients sitting in the dental chair will suffice