Muhammad Azeem, Muhammad Burhan Hayat, Sajjad Hussain Shah, Saif-ur Rehman.
Correlation Between Von Spee`s Curve And Vertical Eruption Of Teeth In Class III Malocclusion.
Pak Oral Dental J Jan ;37(1):55-7.

The objective of this cross-sectional study was to find out whether the depth of the von spee’s curve is influenced by the vertical eruption of anterior or posterior teeth. The study was conducted at Department of Orthodontics, de,Montmorency College of Dentistry, Lahore; in which one hundred twenty five lateral cephalograms and models of untreated Class III malocclusion patients (62 boys, mean age:14.3 ±1.3 years; 63 girls, mean age: 16.0 ± 1.7 years) were included. The depth of the von spee’s curve was calculated on lateral cephalograms as perpendicular distance from tip of lower central incisor to the mandibular plane (L1-MP), distobuccal cusp tip of the lower second molar (M7-MP) to the mandibular plane, the deepest point of the von spee’s curve to the mandibular plane (S-MP), and proportioned with each other. Right and left side von spee’s curve was measured on models. Results showed that the mesiobuccal cusp of the first molar was the deepest part of the von spee’s curve, and eruption of lower molars (M7-MP/S-MP) was more significantly less related to depth of von spee’s curve as compared to eruption of lower incisors (L1-MP/S-MP). There was no significant difference between Right and left side von spee’s curve. It was concluded that vertical eruption of the lower incisors made a significant effect on the depth of the von spee’s curve in Class III patients.

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