Abstract
A clinical and statistical investigation was carried out on patients with cleft lip and/or cleft palate and other congenital anomalies at the Orthodontic Clinic in Fukuoka Dental College Medical and Dental Hospital over the past 17 years（2002-2019）. The following results were obtained:
1．There were 119 cleft lip and/or palate patients and 49 patients with other congenital anomalies including 17 diseases.
2．The distribution of cleft type was: cleft lip and palate 43.7％, cleft lip and alveolus 26.9％, cleft lip 11.8％, cleft soft palate 9.2％, cleft palate 5.9％, and submucosal cleft palate 2.5％.
3．The distribution of other congenital anomalies was: 13 patients with Down syndrome, 11 patients with Goldenhar syndrome, and 1 to 4 patients with a variety of 15 other diseases.
4．The number of both cleft lip and/or palate patients and patients with other congenital anomalies was found to be increased. The mean age of the patients at the first visit to the orthodontic clinic was 9.3years.
5．A total of 74.8％ of cleft lip and/or palate patients and 59.2％ of patients with other congenital anomalies were referred from the Clinic of Plastic, Reconstructive, and Aesthetic Surgery of Fukuoka University Hospital, while 22.4％ of other congenital anomalies patients were referred from dental practitioners.
6．Regarding the frequency of malocclusions in cleft lip and/or palate patients, 56.3％ had occlusal anomalies and 84.0％ had space anomalies. For the other congenital anomaly patients, 55.1％ had occlusal anomalies and 93.9％ had space anomalies.
7．Type 1（no crossbite）was the most frequently-occurring crossbite classification for cleft lip and/or palate patients, at 56.3％.
