Drs. Rein & Seltzer own Long Island Dental Sleep Medicine. Both doctors have over 20 years experience in treating patients suffering from Obstructive Sleep Apnea. They specialize in treating patients who cannot tolerate wearing a CPAP mask and need alternative treatment with a custom Oral Appliance; this line of treatment is comfortable and effective for most cases of sleep apnea. They are located in Williston Park of Nassau County in Long Island and have treated thousands of patients and have developed a reputation on the island of being the dentists that medical doctors refer their patients to for quality sleep apnea treatment with an Oral Appliance.