Bouma J, Schaub R M, van de Poel F
Community Dent Oral Epidemiol. 1985 Dec;13(6):323-7. doi: 10.1111/j.1600-0528.1985.tb00465.x.
A combined sociodental research project was started in the city of Groningen in 1982 aimed at gaining insight into the reasons for total tooth extraction. Patients showing up for total tooth extraction during 1982 participated in this study by filling out a questionnaire concerning the underlying reasons for their decision to have all their teeth extracted. The dentists in this city were asked to collect all the extracted teeth and to fill out a short questionnaire for each patient about the reason (diagnosis) for the total tooth extraction. The periodontal status of the extracted teeth was established afterwards by measuring the percentage of the loss of attachment (L.A.). It appeared that most surfaces in the molar region and the front teeth in the mandible were affected by periodontal disease. Advanced generalized periodontal disease was established in 17% of the patients, accounting for 64% of all teeth with an L.A. measurement of greater than 50%. Periodontal disease could not be identified as the main clinical condition requiring tooth extraction: even in the group of 55 yr of age and older advanced periodontal disease was found in only one third of the extracted teeth. Finally, the contribution of regular dental attendance to periodontal health is discussed.
1982年，在格罗宁根市启动了一项社会牙科联合研究项目，旨在深入了解全口拔牙的原因。1982年前来进行全口拔牙的患者参与了这项研究，他们填写了一份关于决定拔除所有牙齿的潜在原因的问卷。该市的牙医被要求收集所有拔除的牙齿，并为每位患者填写一份关于全口拔牙原因（诊断）的简短问卷。之后，通过测量附着丧失（L.A.）的百分比来确定拔除牙齿的牙周状况。结果发现，磨牙区和下颌前牙的大多数表面都受到了牙周疾病的影响。17%的患者被诊断为重度广泛性牙周疾病，在所有附着丧失测量值大于50%的牙齿中，这部分患者的牙齿占64%。牙周疾病不能被确定为需要拔牙的主要临床情况：即使在55岁及以上的患者组中，也只有三分之一的拔除牙齿患有重度牙周疾病。最后，讨论了定期看牙对牙周健康的作用。
