Introduction:
A chieving acceptable occlusal contact during orthodontic treatment is very important. Tooth size ratios play a major role in the prediction of treatment outcomes.
Aim:
The aim of this study is to determine the mesiodistal width of missing mandibular central incisor.
Materials and Methods:
The study sample consisted of study casts of 300 participants in the age range of 18–30 years. Samples having a full complement of teeth with Angle's Class I molar and canine relationships, good intercuspation, normal overjet and overbite, and minimal crowding and spacing. Tooth dimensions were measured using a digital Vernier caliper. The data calculated were used for measuring schedule variance (SV) formula.
Results:
Based on the achieved data, SV formula is derived.
Conclusion:
For achieving esthetic profile, it is essential to calculate the correct mesiodistal width of the teeth. Ideal tooth proportions play an important role in achieving good occlusion at the end of orthodontic treatment.
Management of bilateral cleft lip and palate cases is a challenging task, and if the premaxilla is shifted to either side, it poses a problem for the surgeon to operate and also for the orthodontist to do the orthodontic alignment. The aim of this study was to reposition the shifted premaxilla for better retraction with presurgical infant orthopedics, thus reducing the tissue tension and further scarring which have detrimental effects on maxillary growth. The innovative technique with pre-directional (PD) appliance is easy to fabricate and use and works in this direction. Acrylic, springs, permasoft liner, elastics, retentive tapes. Previous approach for the shifted premaxilla was more focused on the surgical correction. In adults, surgery with osteotomy is the only option, with its own limitations and disadvantages, in repositioning the shifted premaxilla. Thus, PD appliance aids to correct the shifted premaxilla in presurgical molding stage. The premaxilla was thus shifted 5.5 mm to the left side, with premaxilla in facial symmetry, with the PD appliance. Presurgical orthopedics with PD appliance is worth in infants with shifted premaxilla in bilateral clefts cases.
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