In conclusion, the use of dental appliances to treat obstruction of the upper airway is not new. In 1934, Pierre Robin advocated the use of a modified monobloc to move the mandible forward to open the airway in children with micrognathia. 27 For approximately the next 50 years, the use of dental devices for apnea was reserved for the rare cases of severe retrognathia that were not amenable to surgical correction by mandibular advancement osteot- omy. Paradoxically, at a time when refinement in surgical techniques has virtually eliminated the use of dental appliances in this younger age group, the use of dental devices has become popular for middle-aged snorers with or without apnea. However, if orthodontists are to play in increasing role in the management of sleep disorders in the future, we must insist that comparative data, such as those from this study, be provided to support all claims of treatment efficacy.