It is not necessary to remove the decay and place a filling in a primary tooth that will soon come out, especially if the decay is shallow and presenting no problems to the child. On the other hand, if the child will have have the primary tooth for several more months or years, removing the decay and placing a filling is necessary. Even though primary teeth are eventually lost, they serve many important and key roles while they are present. This alone makes them worth the care they require. In addition, infection can affect the developing permanent teeth and cause discomfort if the decay is allowed to progress untreated.
Primary teeth provide cosmetics, phonetics, mechanical digestion and bone growth.
A major function of the back primary teeth, which usually do not come out until about 10 to 12 years of age, is space maintenance and guidance for eruption of the posterior permanent teeth. If these primary posterior teeth are lost prematurely due to untreated decay, some type of space must be maintained to allow the permanent tooth proper space. If too many primary teeth are lost prematurely due to untreated decay, this will affect the child's ability to chew. Speech patterns and development could be affected. Missing and decayed teeth can also be detrimental to a child's self esteem.