anterior

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Points, lines and angles used to assess the craniocervical angulation, sagittal position and length of jaws: N--nasion; S--sella; A--subspinale; B--supramentale; Me--menton; Gn--gnathion; A'--projection of the point A on the base plane of the maxilla; snp--spina nasalis posterior; cv2ip--most inferior and posterior point on the second cervical vertebra corpus; OPTodontoid process tangent through cv2ip point; NS--the anterior cranial base plane; 1.
Expanded en-doscopic endonasal approach for anterior cranial base and su-prasellar lesions: indications and limitations.

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