A team approach treatment for cleft lip and/or palate has been performed in the Center for Advanced Oral Medicine, Hokkaido University Hospital since 1995. A clinical and statistical survey was carried out on patients with cleft and/or palate in our Center, during the 16 years from January 1995 until December 2010.
1. The total number of primary cases was 461. Out of the patients, 226 (49%) were referred from obstetrics and pediatrics, followed by 118 (25.6%) were from plastic surgery, and 80 (17.4%) from oral and maxillofacial surgery.
2. Distribution of the patients according to the cleft type was: cleft lip and/or alveolus(CL) in 51 (11.1%), cleft lip and palate(CLP) in 222 (48.2%), isolated cleft palate (CP) in 126 (27.3%), submucous cleft palate(SMCP) in 55 (11.9%), CL and SMCP in 7 (1.5%).
3. Mean initial visits were of CL at 10.8 weeks of age, CLP at 5.0 weeks, CP at 14.2 weeks, SMCP at 96.6 weeks, and CL and SMCP at 38.0 weeks.
4. A total of 451 (98%) were patients who live in Hokkaido prefecture. The geographic distribution of the patients resident was 54.7% from Ishikari subprefecture including Sapporo city, 10.4% from Iburi including Tomakomai city, 6.5% from Kushiro, 6.3% from Shiribeshi including Otaru city, and 22.1% from other subprefectures.
5. The type of CL and CLP in 280 cases was unilateral in 211 cases and bilateral in 69 cases, with a ratio of 3.1 : 1, and the laterality was the left side in 151 out of 211 and the right side in 60 out of 211, with a ratio of 2.5 : 1.
6. Associated congenital anomalies were found in 127 of all patients(27.5%), and they were more frequently in SMCP and CP: 26 out of 55 (47.3%) in SMCP, 57 of 126 (45.2%) in CP, 40 of 222(18.0%) in CLP, 4 of 51 (7.8%) in CLA.
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