Oles R D, Ibbott C G, Laverty W H
J Periodontol. 1985 May;56(5):259-61. doi: 10.1902/jop.1985.56.5.259.
Citric acid conditioning of denuded roots prior to laterally positioned pedicle flap (LPPF) coverage may increase the likelihood of reattachment, but no controlled studies to determine the efficacy of the procedure in managing naturally occurring defects in humans have been reported. This investigation compared the effects of LPPF root coverage with and without citric acid (pH1) pretreatment in a group of patients with gingival recession and associated denuded roots. Thirty-six patients participated in the study. Eighteen received LPPFs without citric acid pretreatment and 18 received LPPFs with citric acid pretreatment. Gingival recession and sulcus depth were measured preoperatively and 30, 60 and 90 days after the surgical procedure. LPPFs both with and without citric acid pretreatment reduced significantly the amount of exposed root, but no differences between groups were found. For sulcus depth, the 90-day value for the citric acid group was significantly increased over the preoperative level, but no other changes were noted. There appears to be no clinical justification for using citric acid conditioning as an adjunct to LPPF coverage of denuded roots.
在采用侧向蒂瓣（LPPF）覆盖之前，对裸露牙根进行柠檬酸预处理可能会增加牙根再附着的可能性，但尚无对照研究报道该方法在处理人类自然发生的牙体缺损方面的疗效。本研究比较了一组牙龈退缩伴裸露牙根患者在接受LPPF牙根覆盖时，有无柠檬酸（pH1）预处理的效果。36例患者参与了该研究。18例接受了未进行柠檬酸预处理的LPPF，18例接受了柠檬酸预处理的LPPF。在手术前以及手术后30、60和90天测量牙龈退缩和龈沟深度。进行柠檬酸预处理和未进行预处理的LPPF均显著减少了牙根暴露量，但两组之间未发现差异。对于龈沟深度，柠檬酸组90天时的值较术前水平显著增加，但未观察到其他变化。使用柠檬酸预处理作为LPPF覆盖裸露牙根的辅助手段似乎没有临床依据。
