新反射弧的中枢神经调节。
结论：以牙槽孔至颧下嵴起始部的弧长和弦长为标准弯制注射针头，采用口内注射法进行上牙槽后神经阻滞麻醉，成功率为98％。
Conclusion: We use L as arch length and H as chord length to bend syringe needle that is used to posterior superior alveolar nerve block anesthesia by intraoral injection. The success rate is 98%.
结论：在颈部疼痛、交感神经和颈性眩晕之间有一个反射弧的存在。
CONCLUSION There is a reflex arc between cervical pain sympathetic nerve and the cervical vertigo.
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