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In such a case LLA prevents the permanent molars from migrating mesially (forward) thus blocking off the eruption space for the premolar teeth. LLA is also used in order to maintain the so-called "Leeway space", which is the extra space available in the arch when the deciduous molars are exfoliated and replaced by smaller permanent premolars. [1]
To protect and restore teeth that may have extensive tooth tissue loss due to erosion, attrition or abrasion. [22] As a support for some dental appliances e.g. space maintainers [22] In patients with special needs or where regular oral hygiene is impaired leading to likely breakdown of regular direct restorations.
Orthodontic space closure [69] [80] is a way of using orthodontics in order to close spaces in the mouth where the teeth are missing. The ideal age for definitive orthodontic treatment is early adolescence but it is important to consider the patient's age, severity of hypodontia, patient expectations and their commitment to treatment. [ 81 ]
The thickness increases to 0.6 or 0.7mm wire if it is to move more teeth or a larger/multi rooted tooth. [7] Palatal Finger Spring - These springs are used to move teeth buccally or lingually. Buccal Canine Retractor - These springs are used to bring a buccally placed canine more lingual. Z-Spring - This spring is used to move one or two teeth ...
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One of the earliest uses of anchorage came from Henry Albert Baker for his use of the intermaxillary anchorage or Baker's Anchorage. This type of anchorage involves using elastics from one jaw to the other, in the form of either Class 2 elastics (moving upper teeth back) where lower molar teeth serve as anchors, or Class 3 elastics (moving lower teeth back) where upper molars serve as anchors.
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In dentistry, a mutually protected occlusion is an occlusal scheme in which the anterior teeth protect the posterior teeth, and vice versa.. The anterior teeth protect the posterior teeth by providing for a plane of guidance during excursions, thus allowing the cusps of the posterior teeth to disclude rather than strike one another during lateral or protrusive movements from centric relation.
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