Ortendahl T, Thilander B, Svanberg M
Department of Orthodontics, Faculty of Odontology, University of Göteborg, Sweden.
Am J Orthod Dentofacial Orthop. 1997 Sep;112(3):271-4. doi: 10.1016/S0889-5406(97)70255-5.
Levels of mutans streptococci in plaque adjacent to orthodontic brackets retained with a glass ionomer cement (GIC) (Ketac-Cem) and a resin-based composite (CR) (Concise) were investigated, using the split mouth technique in 11 patients who, before treatment, had more than 10(5) CFU of these microorganisms. After full-term orthodontic treatment (mean 9.5 months), the percentage of mutans streptococci of total CFU count in plaque was lower adjacent to GIC-retained brackets (mean 3.9) than adjacent to CR-retained brackets (6.7), but the difference was not statistically significant. Two subjects harbored S. sobrinus. These subjects were the only ones who developed incipient caries during the orthodontic treatment. Incipient lesion formation occurred only adjacent to CR-retained brackets. This suggests that in patients who have relatively high salivary levels of mutans streptococci before treatment and especially in those who harbor S. sobrinus, the use of GIC for bonding may prevent incipient caries formation during orthodontic treatment.
采用自身对照法，对11例治疗前变形链球菌计数超过10(5)CFU的患者进行研究，观察用玻璃离子水门汀（GIC）（Ketac-Cem）和树脂基复合材料（CR）（Concise）固定正畸托槽附近菌斑中变形链球菌的水平。正畸治疗满疗程（平均9.5个月）后，GIC固定托槽附近菌斑中变形链球菌占总CFU计数的百分比（平均3.9）低于CR固定托槽附近（6.7），但差异无统计学意义。两名受试者携带远缘链球菌。这两名受试者是正畸治疗期间仅有的发生早期龋的患者。早期损害仅发生在CR固定托槽附近。这表明，对于治疗前唾液中变形链球菌水平相对较高的患者，尤其是携带远缘链球菌的患者，使用GIC粘结可预防正畸治疗期间早期龋的形成。
