Abstract
Introduction: Von Spee’s curve is one of the important treatment aspects in orthodontics. Any orthodontic treatment planning is dependent on this key factor.Objective: To find out the correlation between the Von Spee’s curve and occlusal eruption of anterio-posterior teeth in Class II Division 2 malocclusion.Materials & Method: Current research was conceived at the Department of Orthodontics, de’Montmorency College of Dentistry and Faisalabad Medical University. Two hundred and fifty Class II Division 2 patients (112 male, mean age: 15.1±1.5 years; 138 female, mean age: 15.4± 1.3 years) were included. Depth of the curve was calculated on lateral cephalograms and dental plaster models, and correlated with the vertical eruption of lower incisal teeth and posterior mandibular molars.Result: The mesiobuccal site of mandibular first molar was the deepest part of Von Spee’s curve, and vertical eruption of lower incisal teeth were more related to depth of Von Spee’s curve as compared to vertical eruption of mandibular molars.Conclusion: Vertical eruption of the mandibular molar teeth make significant contribution to the depth of Von Spee’s curve in Class II Division 2 malocclusion.
Highlights
Von Spee’s curve is one of the important treatment aspects in orthodontics
The Von Spee’s Curve (VSC) of 1 mm per side is considered to be normal in any individual and this depth can be linked to the differential eruption timing of maxillary and mandibular teeth which allows unopposed vertical eruption of mandibular teeth.[3]
VSC depth was calculated on plaster casts using Veli’s method,[11] in which horizontal line was drawn from the incisal edges of lower incisal teeth to the distobuccal cusp tip of lower second molar and measuring of the perpendicular distance from this horizontal reference line to the buccal cusp tip of the deepest involved tooth of right and left side
Summary
Von Spee’s curve is one of the important treatment aspects in orthodontics. Objective: To find out the correlation between the Von Spee’s curve and occlusal eruption of anterio-posterior teeth in Class II Division 2 malocclusion. Depth of the curve was calculated on lateral cephalograms and dental plaster models, and correlated with the vertical eruption of lower incisal teeth and posterior mandibular molars. Conclusion: Vertical eruption of the mandibular molar teeth make significant contribution to the depth of Von Spee’s curve in Class II Division 2 malocclusion. It has been found that as the VSC deepens, amount of vertical and horizontal overlapping of incisors increases.[4]
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