During the treatment planning process, extraction decisions are crucial. As a therapy option, the extraction of teeth should be considered in instances where there is a lack of facial harmony and stability in the occlusion. Treatment aims, the kind of malocclusion, aesthetic considerations, and growth patterns are all factors that influence asymmetric extraction. For the most part, premolar extractions are required when there is a significant midline difference or an asymmetrical connection between the teeth. Premolars, which are the first teeth to erupt and occupy the posterior position in chewing, are more vulnerable to injury than other permanent teeth. The optimal time to remove a second molar is at the moment when the connection between the molars has normalized or when a major front cross-bite can be remedied.
Objectives: Deep bite or increased overbite correction often offers a challenge to the clinician during orthodontic treatment. Bite opening with conventional mechanics in high angle cases which require intrusion of anteriors cause reciprocal forces in the posteriors which is undesired. Absolute or true en masse intrusion mechanics using mini-implants are ideal for such cases. This study explores the rate, amount of intrusion and torque changes of maxillary anteriors over a period of 6 months using mini-implants between canine and lateral incisors bilaterally.
Materials and methods:Bilateral mini-implants made by Dentos were placed between lateral incisors and canines and a force of 45 gm per side was applied. Pre-and postlateral cephalograms were evaluated for the rate, amount of intrusion and torque changes.Results: Rate of intrusion of incisors was found out to be 0.43 mm/month and rate of intrusion of canines was found out to be 0.18 mm/month and the torque changes observed were nonsignificant.
Conclusion:Mini-implants were used to deliver light continuous forces of optimal magnitudes and they were observed to be efficient and stable source of anchorage for en masse intrusion of the maxillary anterior teeth. The amount of intrusion achieved for six maxillary anterior teeth was statistically and clinically significant without significant torque changes.
One third of all craniofacial anamolies of head and neck region are of cleft lip and palate with an incidence of 1 in 700 worldwide. In Asian population the reported incidence is 2.0 per 1000 live births or higher. This case report presents the treatment of a 1-month old bilateral cleft lip and palate baby with Presurgical Nasoalveolar Molding, which was followed by chelioplasty.
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