Singh, S PUtreja, AChawla, H S2008-03-082009-06-022008-03-082009-06-022008-03-08Singh SP, Utreja A, Chawla HS. Distribution of malocclusion types among thumb suckers seeking orthodontic treatment. Journal of the Indian Society of Pedodontics and Preventive Dentistry. 2008 ; 26 Suppl 3(): S114-7http://imsear.searo.who.int/handle/123456789/115107The present study was conducted to evaluate the influence of thumb sucking and its duration on the type of malocclusion. A total of 410 North Indian individuals between ages 12-30 years, 161 males and 249 females were examined. A specially designed proforma was used to record the detailed history of the individual. Among the etiological factors it was found that history of thumb sucking was present in 13.9% and significantly related to Class II div 1 malocclusion. When thumb sucking exceeded 18 months, it was found statistically significant (P < 0.1) in Class II skeletal malocclusion, in open bite (P < 0.1) and in extreme overjet (P < 0.5). CONCLUSION: If thumb sucking is not treated early, it can cause skeletal Class II malocclusion, anterior open bite and excessive overjet.engAdolescentAdultChildFemaleFingersucking --adverse effectsHumansMaleMalocclusion, Angle Class I --etiologyMalocclusion, Angle Class II --etiologyOpen Bite --etiologyYoung AdultJournal Article