inverted and impacted third molars - report of two rare cases with literature

Background: Teeth start to erupt during infancy and again when the primary teeth are replaced by the permanent teeth. If a tooth fails to erupt or emerges only partially, it is considered to be impacted. This most commonly happens with the wisdom teeth as they are the last teeth to erupt in the oral cavity between 17 to 21 years. An impacted tooth remains stuck in gum tissue or bone for various reasons as in overcrowded regions were there could be no room for them to emerge or if the jaw is too small to fit the wisdom teeth. Teeth may also become twisted, tilted or displaced as they try to emerge resulting in impaction.