長岡赤十字病院歯科口腔外科における最近６年間（昭和５６年〜昭和６１年）の来院患者の臨床統計的観察

Abstract

A clinicostatistical analysis of 9, 478 out patients in the Clinic of Dentistry and Oral Surgery, Nagaoka Red Cross Hospital during the past 6 years from January, 1981 to December, 1986 is presented. The patients consisted of 4, 518 males and 4, 960 females with a male to female ratio of 1:1.1. Eighteen percent of them were in the twenties, 15% in the thirties and 20% were over sixty. The number of patients visiting us each year increased from 1, 510 in 1983 to 1, 683 in 1986 with a mean of 1, 580. In terms of month, it was higher during the summer season from June to August than during the winter season from November to February. Fifty eight percent of patients were residents of Nagaoka City where our hospital is located and those from outside Niigata prefecture was less than 1%. In 1982, patients referred to our hospital from other dental and medical facilities constituted 59% of the total patients, but the rate fell to 41% in 1986, mainly due to the decrease of patients referred to us from dentists in general practice and in other hospitals. Forty eight percent of patients visited us for treatment of dental and periodontal diseases, which were followed, in order of frequency, by inflammation (17%), tooth loss and inadequate prosthetics (9%), traumas (7%), cysts (5%), diseases of the temporomandibular joint and the oral mucosa (5% each), malformations and jaw deformities (2%) and benign and malignant tumors (2%). Patients with diseases of the salivary glands and neurologic diseases were less than 1%. A tendency to gradual increase was noted in the number of patients with traumas, cysts, diseases of the temporomandibular joint and the oral mucosa, whereas those with dental and periodontal diseases and inflammation decreased every year.