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Steiner analysis
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Steiner analysis

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  • Even in rotated head

Steiner analysis Steiner analysis Presentation Transcript

  •  Steiner proposed the appraisal of various parts of the skull separately Skeletal Dental Soft tissue
  •  Skeletal Entails relating the upper and the lower jaw to the skull and to each other
  •  Dental Entails relating the upper and lower incisor teeth to their respective jaw and to each other
  •  Soft tissues Provide the means of assessing the balance and harmony of lower facial profile
  • Skeletal Analysis Used anterior cranial base (sella-nasion) as a reference line The advantage is the two midline points moved minimal amount when the head deviate from the true profile position
  • maxilla Point A is not an ideal reference point SNA noted to determine maxilla is positioned anteriorly or posteriorly to the cranial base
  • Mandible To determine is whether mandible is protrusive or recessive related to cranial base the SNB angle is noted.
  • Relationship of Maxilla andMandible According to steiner his major concern is the ANB angle ANB angle provide a general idea of the anteroposterior discrepancy of the maxillary to the mandibular apical bases
  • Occlusal Plane Drawn through the region of the overlapping cusps of the first premolars and first molars.
  • Mandibular Plane The mandibular plane is drawn between gonion (GO) and gnathion (Gn). Relating to anterior cranial base.
  • Dental Analysis
  • Maxillary Incisor position Axial inclinationis related to to N-A line
  • Mandibular Incisor Position Axial inclinationis related to to N-B line
  • Interincisal Angle Relates the relative position of the upper incisor to that the lower incisor.
  • Lower Incisor to chin
  • Soft-Tissue Analysis Is a graphic record of visual observation of clinical examination of patients S-line reference lips should touch a line extending from the soft tissue contour of the chin to the middle of the lower boarder of the nose
  • Acceptable Compromises Cephalometry must not be regarded as a numbers game in which the measured parameters of the tracing must approximate those of normal occlusion or the dentofacial skeletal pattern
  • Thank You ^^