Why does my child have dental bone loss?

Juv. Periodontitis: Pre-pubertal periodontitis can occur in children before puberty and is associated with severe inflammation of the gums. Juvenile periodontitis occurs in young adults that develop periodontal disease during or after puberty. The cause of juvenile periodontitis is believed to be autoimmune and may have a genetic predisposition.

So many reason: First of all, how old is your child? For someone less than 21 years old, having dental bone loss is very serious and must be treated immediately. He or she may have neutrophil defect, or lack of the body first line of defense against infection. Host factor may be compromised. For someone older, he or she may have occlusal problem, or may have poor oral hygiene technique needed to be address.