Pedersen J, Stensgaard K, Melsen B
Community Dent Oral Epidemiol. 1978 Jul;6(4):204-9. doi: 10.1111/j.1600-0528.1978.tb01151.x.
The influence of premature extraction of primary teeth. The influence of the site of extraction was analyzed by studying the frequency of malocclusion in the group of children with extraction in the mandible or maxilla only. It was found that early loss of primary teeth would result in an increased frequency of sagittal, vertical as well as transversal malocclusion. As a consequence the need for treatment would increase significantly by early extraction of primary teeth. Whereas extraction in the maxilla would tend to result in need for extraction of permanent teeth; extraction in the mandible would often lead to need for orthodontic treatment of longer duration. On the basis of these findings it could be concluded that maintaining a high standard of dental service for preschool children must be considered good economy, since the need for premature extractions is reduced.
乳牙过早拔除的影响。通过仅研究下颌或上颌拔牙儿童组的错牙合频率来分析拔牙部位的影响。结果发现，乳牙过早缺失会导致矢状、垂直和横向错牙合的频率增加。因此，乳牙过早拔除会显著增加治疗需求。而上颌拔牙往往会导致恒牙拔除的需求；下颌拔牙通常会导致更长时间的正畸治疗需求。基于这些发现，可以得出结论，为学龄前儿童维持高标准的牙科服务必须被视为良好的经济行为，因为过早拔牙的需求减少了。
