For children with Class II malocclusion, commonly referred to as an overbite or buck teeth, ''there is no advantage to starting early,'' according to Dr. William Proffit, a professor at the University of North Carolina's School of Dentistry in Chapel Hill.
said that was the conclusion of ''three major, randomized clinical trials comparing the outcomes of treatment'' for younger versus older children.
''Early treatment is more costly both in terms of the amount of money you have to pay and the number of visits you make, and there is a greater burden of treatment with no benefit for most children,'' he
was the author of one of the three studies that looked at early treatment for Class II malocclusion, with the other two done by researchers at the University of Florida
and in the United Kingdom.
emphasized that early treatment is beneficial for other conditions, such as a Class III malocclusion, commonly referred to as an underbite, where the lower jaw is too big or the upper jaw is too small. ''You're trying to change growth and your window of opportunity has run out by age 10.
The ideal time to start would be as early as age 7,'' Proffit
The largest group of children getting orthodontic treatment in the U.S. are those with Class I malocclusion, with crowded teeth that are either crooked or protrude.
For this group, Proffit
said, ''early treatment works, but you have to do two phases of treatment.
So they're going to be in treatment for four years - a first phase, then a vacation, and a second phase.''
said there is one overarching reason to start early no matter what type of treatment the child will need, and that's when teeth are so crooked or unattractive that ''the child is really being teased and harassed and has psychosocial problems,'' he
said. ''Most preadolescent kids shrug it off, but some kids are really bothered by it.''