Robertson P B, Schultz L D, Levy B M
J Periodontol. 1977 Apr;48(4):232-5. doi: 10.1902/jop.1977.48.4.232.
Forty patients in active retention following orthodontic tooth movement into premolar extraction sites were examined for the occurrence and distribution of interdental gingival clefts, defined as an invagination of interproximal tissue with definite mesial and distal peaks having a depth of at least 1 mm. Fourteen of the forty orthodontic patients demonstrated clefts in one or more of the premolar extraction sites. No clefts were observed in premolar areas of orthodontic patients who did not require premolar extraction or in patients without previous orthodontic treatment. Interdental clefts occurred most frequently at the buccal aspect of mandibular first premolar extraction sites. The presence of the cleft appears to have clinical implications, both in terms of orthodontic relapse, and maintenance of gingival health.
对40例正畸牙移入前磨牙拔除位点后处于主动固位期的患者进行检查，以观察牙间龈裂的发生情况和分布，牙间龈裂定义为邻面组织内陷，有明确的近中峰和远中峰，深度至少为1毫米。40例正畸患者中有14例在一个或多个前磨牙拔除位点出现龈裂。在不需要拔除前磨牙的正畸患者的前磨牙区域或未接受过正畸治疗的患者中未观察到龈裂。牙间龈裂最常出现在下颌第一前磨牙拔除位点的颊侧。龈裂的存在似乎在正畸复发和牙龈健康维持方面都具有临床意义。
