目的 采用多普勒血流仪检测年轻上颌切牙的牙髓组织血流量(PBF),分析年龄对PBF的影响.方法 采用激光多普勒血流仪检测7~13岁儿童(儿童组)、18~25岁青年人(阳性对照组)的上颌中切牙和侧切牙的PBF,以已行根管治疗的上颌中切牙的PBF为阴性对照组.对各组PBF以及不同性别、牙位间的PBF进行比较,同时分析上颌中切牙与侧切牙PBF间的关系,以及儿童组上颌切牙PBF与年龄间的关系.结果 儿童组中切牙、侧切牙的PBF分别为(11.31±2.21)、(12.18±2.65)PU,阳性对照组中切牙、侧切牙的PBF分别为(8.49±1.88)、(7.52±1.82)PU,阴性对照组中切牙PBF为(2.08±0.73)PU.各组间同名牙及组内中切牙与侧切牙间均存在统计学差异(P<0.01),而左右侧同名牙之间、不同性别间均无统计学差异(P>0.05).中切牙、侧切牙PBF与年龄呈线性负相关关系,Pearson相关系数分别为-0.310和-0.510(P<0.01).结论 7~13岁儿童正常上颌切牙PBF值随着年龄的增加而减小.%Objective This study aimed to evaluate the influence of age on the pulpal blood flow (PBF) of immature maxil-lary incisors of maxillary incisors, which was detected by laser Doppler flowmetry (LDF).Methods LDF was used to detect the PBF value of maxillary central and lateral incisors of a child group (aged 7–13 years old) and a positive control group (aged 18–25 years old), as well as the central incisor of a negative control group (the central incisor had undergone endodontic treatment). We then compared the features of PBF in all groups with the influence of gender and position on PBF. The relation of maxillary central incisor and lateral incisor, age, and maxillary incisor were analyzed.Results The PBF value of the nega-tive control group was (2.08±0.73) PU. The PBF values in the positive control group in central and lateral incisors were (8.49± 1.88) and (7.52±1.82) PU. In the child group, PBF values in central incisors and lateral incisors were (11.31±2.21) and (12.18± 2.65) PU. A significant difference was observed between different groups and between central and lateral incisors (P<0.01). Meanwhile, no significant difference was found in the PBF values between the right and the left parts in both males and females (P>0.05). Age had a linearity negative correlation with the PBF value of incisors in the child group. A linear nega-tive correlation existed between the age and PBF of central and lateral incisors (r=-0.310 andr=-0.510, respectively) (P<0.01).Conclusion PBF value decreased with increased age in children aged 7–13 years old.
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