Which deciduous teeth are most frequently retained in permanent dentition?

In the context of dental anatomy and development, the second lower molars are the most frequently retained deciduous teeth in permanent dentition. This phenomenon can occur due to various factors, such as the retention of primary teeth when the underlying permanent teeth fail to erupt properly.

The second lower molars typically have a strong root structure and can remain in place if there are no issues with resorption or if the permanent successors are either delayed in eruption or absent. Additionally, primary molars may retain their position for functional purposes, as they help maintain the space necessary for the proper alignment of the dental arch and the development of other permanent teeth.

While the upper lateral incisors and upper central incisors are also susceptible to retention issues, it is less common for them to remain when compared to the second lower molars. This is because incisors generally have a more precise eruption timing and more prominent successors that typically push them out of their position when the time comes for the permanent teeth to emerge.