Ahmad Hasan, Momina Rashid Chughtai.
Effect Of Asymmetric Molar And Canine Relationship On Dental Midlines In Orthodontic Patients.
Pak Oral Dental J Jan ;37(1):87-91.

In an attractive smile dental midlines must be coincident with each other as well as with facial midline. Dental midlines may be non coincident due to asymmetry in molar or canine relationship on the right and left side of the arch. Aim of the present study was to find out the effect of asymmetric molar and canine relationship on coincidence of dental midlines. The sample consisted of study casts of 177 patients who came to orthodontic department of a tertiary care hospital over a period of 17 months. Molar and canine relationship and dental midlines coincidence or non coincidence was recorded from the study casts when these were in maximum intercuspation. SPSS 21 was used for statistical analysis and chi-square test was applied to find effect of molar and canine relationship asymmetry on coincidence of dental midlines. 39.5% of the sample had asymmetric molar relationship, out of which 16.4% had coincident dental midlines and 23.2% had non-coincident dental midlines (Statistically insignificant as p-value was 0.096). 32.8% of the sample had asymmetric canine relationship, out of which 13.6% had coincident dental midlines and 19.2% had non-coincident dental midlines (Statistically insignificant as p-value was 0.149). Over all coincident midlines were found in 49.2% and non coincident midlines in 50.8% of the patients. Half step molar and canine relationship asymmetry was more common than full step asymmetry. Effect of asymmetric molar and canine relationship had statistically insignificant effect on coincidence of dental midlines. Asymmetric molar and canine relationship is less common than symmetric molar and canine relationship.

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