Forsberg C M, Brattström V, Malmberg E, Nord C E
Department of Orthodontics, Karolinska Institutet, Huddinge, Sweden.
Eur J Orthod. 1991 Oct;13(5):416-20. doi: 10.1093/ejo/13.5.416.
Twelve orthodontic patients undergoing treatment with fixed appliances took part in the present study. In all patients elastomeric rings were used for ligation on one side of the dental arch midline, whereas steel wires were used on the opposite side. The number of micro-organisms in samples of plaque, taken from the labial surface of the upper lateral incisors, was recorded on five occasions during treatment. In samples of saliva, the numbers of Streptococcus mutans and lactobacilli were recorded on the same occasions. This registration was also made on two occasions before insertion of the fixed appliance, and 6 weeks after the period of active treatment. The results showed that, in the majority of patients, the incisor which was attached to the arch-wire with an elastomeric ring, exhibited a greater number of micro-organisms in the plaque than the incisor ligated with steel wire. Following insertion of fixed appliances the number of S. mutans and lactobacilli in saliva increased significantly. Variations in the number of micro-organisms in the saliva during active treatment were not reflected in any relative increase or decrease in microbial colonization on either steel ligatures or elastomeric rings. The use of retainers after active treatment was not associated with increased numbers of micro-organisms in the saliva.
12名正在接受固定矫治器治疗的正畸患者参与了本研究。在所有患者中，在牙弓中线一侧使用弹性圈结扎，而在另一侧使用钢丝。在治疗期间的五个时间点记录从上门牙侧切牙唇面采集的菌斑样本中的微生物数量。在唾液样本中，在相同时间点记录变形链球菌和乳酸菌的数量。在固定矫治器植入前的两个时间点以及积极治疗期后的6周也进行了这种记录。结果表明，在大多数患者中，用弹性圈固定在弓丝上的切牙菌斑中的微生物数量比用钢丝结扎的切牙更多。固定矫治器植入后，唾液中变形链球菌和乳酸菌的数量显著增加。积极治疗期间唾液中微生物数量的变化并未反映在钢丝结扎或弹性圈上微生物定植的任何相对增加或减少上。积极治疗后使用保持器与唾液中微生物数量增加无关。
