EARLY ORTHODONTIC TREATMENT – POSTERIOR CROSSBITE

A posterior crossbite is a condition where the upper and lower back teeth do not mesh together properly due to the narrow width of one arch compared to the other. The top left picture shows a buccal crossbite ("scissor bite") where the upper teeth are too far outside of the lower teeth and the chewing surfaces of the back teeth do not contact at all.The bottom left picture shows the most common presentation of a posterior crossbite. The upper jaw is narrow in width compared to the lower jaw and the upper back teeth sit closer towards the middle of…

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