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54 Cards in this Set
- Front
- Back
What is FH-SN angle?
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Angle formed between frankfurt horizontal plane and Sella-Nasion Plane. (7 +/- 3 degrees)
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What is S-N-B?
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Angle formed between the Sella-Nasion Plane and Nasion-B plane (80 +/-4 degrees)
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What is A-N Perp?
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Distance from A point to Nasion Perpindicular (0 +/- 3)mm)
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What is Pg-N Perp?
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Distance from Pg (Pogonion) to Nasion perpindicular (-1 +/- 3mm)
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What is SN-MP?
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Angle formed betwee the Sella-Nasion plane and the Mandibular plane (32 +/- 5 degrees)
(Go=Gonion, Me=Menton) |
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What is Mx I-SN?
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Angle formed between the Upper incisor and the Sella-Nasion Plane (106+/- 8 degrees)
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What is Mx I- (N-A)?
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Angle formed between the Upper incisor and Nasion-A plane (22+/- 2 degrees)
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What is (Md I)-(MP)?
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Angle formed between Lower incisor axis and the Mandibular plane (90+/-1 degrees)
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What is I-I?
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Interincisal angle. Angle formed between the upper and lower incisor axis
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What is S-N-A?
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Angle formed between Sella-Nasion plane and the Nasion-A plane (82+/- 3 degrees)
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What is A-N-B?
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Angle formed between the Nasion-A plane and the Nasion-B plane (2 degree +/- 3 degrees)
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What is the Facial angle?
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Angle between the Frankfurt horizontal plane and the Nasion-Pogonion plane. (90+/-3 degrees)
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What is the Y axis?
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Angle between the Sella-Nasion plane and the Sella-Gnathion plane (65+/- 4 degree)
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What is PP-MP/Palatal-Mandibular
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Angle between the Palatal (PNS-ANS) plane and the Mandibular plane. (25 +/- 4 degrees)
Go= Gonion, Me= Menton) PNS=Posterior nasal spine ANS=Anterior Nasal Spine |
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What is the Mx I-A-vert ?
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Distance from the incisal edge of the upper central incisor to point A (5mm)
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What is Mx I-A-(N-A)-Distance?
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Upper incisor tip-(Nasion-A point) (4 +/-1 mm)
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What is Md I-A Pg?
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Distance from the incisal edge of the lower central incisor to A-Pg (3 +/- 2mm)
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What is LL-E plane?
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Lower Lip-E plane. Distance from the lower lip to the E plane.
E plane = Pronasale - Skin Pogonion plane |
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What is the significance of the FH-SN angle being LESS than normal?
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SN plane too horizontal (Blue Arrow)
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What is the significance of the FH-SN angle being MORE than normal?
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SN plane too inclined (Blue arrow)
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What is the significance of the S-N-A angle being LESS than normal?
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Retrusion of A point. Suggests Skeletal horizontal maxillary deficiency (Blue arrow)
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What is the significance of the S-N-A angle being MORE than normal?
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Increased. Indicates protrusion of A point. Suggests Skeletal horizontal maxillary excess
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What is the significance of the S-N-B angle being LESS than normal?
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Indicates retrusion of B point. Suggests horizontal mandibular deficiency (Micrognatism)
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What is the significance of the S-N-B angle being MORE than normal?
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Indicates protrusion of B point. Suggests Skeletal horizontal mandibular access (Prognatism)
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What is the significance of the A-N-B angle being LESS than normal?
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Suggests Skeletal class three. Indicates a bad antero-posterior relationship between Maxilla and the Mandible
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What is the significance of the A-N-B angle being MORE than normal?
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Suggests Skeletal Class II. Indicates bad anterio-posterior relationship between maxilla and Mandible
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What is the significance of the A-N Perp distance being LESS than normal?
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Indicates retrusion of A point. Suggests Skeletal horizontal maxillary deficiency
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What is the significance of the A-N Perp distance being MORE than normal?
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Indicates Protrusion of A point. Suggests Horizontal maxillary Excess
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What is the significance of the Pg-N Perp distance being LESS than normal?
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Indicates retrusion of Pg Point. Suggests Skeletal horizontal chin deficiency
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What is the significance of the Pg-N Perp distance being MORE than normal?
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What is the significance of the facial angle being LESS than normal?
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What is the significance of the facial angle being MORE than normal?
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What is the significance of the Y angle being MORE than normal?
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What is the significance of the Y angle being LESS than normal?
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What is the significance of SN-MP angle being LESS than normal?
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What is the significance of SN-MP angle being MORE than normal?
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What is the significance of PP-MP angle being LESS than normal?
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What is the significance of PP-MP angle being MORE than normal?
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What is the significance of Mx I-SN angle being LESS than normal?
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What is the significance of Mx-I-SN angle being MORE than normal?
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What is the significance of Mx I-A Vert being LESS than normal?
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What is the significance of Mx I-A Vert being MORE than normal?
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What is the significance of Mx I-NA ANGLE being MORE than normal?
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What is the significance of Mx I-NA ANGLE being LESS than normal?
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What is the significance of Mx I-NA (Lin) being less than normal?
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What is the significance of Mx I-NA (Lin) being more than normal?
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What is the significance of Md I-MP being LESS than normal?
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What is the significance of Md I-MP being MORE than normal?
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What is the significance of Md I-A Pg being LESS than normal?
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What is the significance of Md I-A Pg being MORE than normal?
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What is the significance of I-I being Less than normal?
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What is the significance of I-I being MORE than normal?
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What is the significance of LL-E PLane being Less than normal?
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What is the significance of LL-E PLane being MORE than normal?
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