Strobl Heinrich, Gojer Gerald, Norer Burghard, Emshoff Rüdiger
Department of Oral and Maxillofacial Surgery, University of Innsbruck, Austria.
J Am Dent Assoc. 2003 Dec;134(12):1597-603. doi: 10.14219/jada.archive.2003.0105.
Laser Doppler flowmetry, or LDF, is a noninvasive method used to assess pulpal blood flow, or PBF. Dental avulsion is associated with loss of pulpal sensitivity. The authors conducted this study to assess whether LDF could be used to detect revascularization of replanted teeth.
The authors used LDF to assess the PBF values of avulsed permanent maxillary incisors treated using replantation and splinting in 17 subjects. They took measurements at four sessions: on the day of splint removal and at 12 weeks, 24 weeks and 36 weeks after splint removal. Five vital control teeth and five nonvital control teeth were used to assess the background signal. At 36 weeks, the authors determined clinically and radiographically whether revascularization had occurred.
LDF readings correctly predicted the pulp status in 88.2 percent of the readings. Of the readings for vital teeth, 100 percent were correct, and of the readings for nonvital teeth, 80 percent were correct. Univariate analysis of variance demonstrated that in revascularized teeth, the PBF value increased significantly from splint removal to week 12 after splint removal and from week 24 to week 36 after splint removal. In the teeth that failed to revascularize, the PBF value dropped significantly from week 24 to week 36 after splint removal.
The results of this study suggest that LDF accurately diagnoses revascularization of avulsed maxillary incisors after replantation and splinting.
LDF may become useful in detecting revascularization much earlier than standard sensitivity tests.
激光多普勒血流仪（LDF）是一种用于评估牙髓血流（PBF）的非侵入性方法。牙脱位与牙髓感觉丧失有关。作者进行了这项研究，以评估LDF是否可用于检测再植牙的血管再生情况。
作者使用LDF评估了17名受试者中采用再植和夹板固定治疗的脱位恒上颌切牙的PBF值。他们在四个阶段进行了测量：拆除夹板当天以及拆除夹板后12周、24周和36周。使用五颗活髓对照牙和五颗无髓对照牙来评估背景信号。在36周时，作者通过临床和影像学方法确定是否发生了血管再生。
LDF读数在88.2%的测量中正确预测了牙髓状态。在活髓牙的读数中，100%正确，在无髓牙的读数中，80%正确。单因素方差分析表明，在血管再生的牙齿中，PBF值从拆除夹板到拆除夹板后12周以及从拆除夹板后24周到36周显著增加。在未能实现血管再生的牙齿中，PBF值在拆除夹板后24周到36周显著下降。
本研究结果表明，LDF能准确诊断再植和夹板固定后脱位上颌切牙的血管再生情况。
LDF在检测血管再生方面可能比标准敏感性测试更早发挥作用。
