龈下楔状缺损修复前不同排龈方法对修复后牙龈出血的影响

目的：观察龈下楔状缺损修复前不同排龈方法对修复后牙龈出血的影响。方法：将165例入选患者随机为三组，A组（n＝55）采用不含药排龈线排龈，B组（n＝55）采用含药排龈线（每英寸含有0．4±0．2 mg肾上腺素）排龈，C组（ n＝55）采用排龈膏排龈，记录三组患者治疗后的牙龈出血率与疼痛感以及随访1年后的牙龈指数（ GI）。结果：三组患者治疗后的牙龈出血率与疼痛感差异显著（ P＜0．05）；随访1年，三组患者均未见修复体脱落，在临床效果（包括充填体脱落、边缘密合性、继发龋、边缘着色）方面差异不显著（ P＞0．05）。结论：三种方法修复龈下楔状缺损均有显著疗效，但排龈膏排龈法在控制修复后牙龈出血方面更有优势。

Influence of Different Gingival Retraction Methods before Subgingival Wedge-shaped Defect Reparation on Gingival Bleeding after Repair

Objective：To observe the influence of different gingival retraction methods before subgingival wedge-shaped defect reparation on gingival bleeding after repair .Method：165 cases were selected and divided into 3 groups randomly .Group A （ n=55 ） received gingival retraction without including medicine , Group B（n=55）received gingival retraction with medicine （ each inch has 0.4±0.2mg phenylephrine）, and group C（ n=55） received gingival retraction with gingival retraction paste .The gingiva bleeding rate and pain after treatment and gingival index after following up for 1 year of three groups were recorded .Result： The difference for gingiva bleeding rate and pain among three groups was not evident （P〈0.05）.After following up for 1 year, three groups had no patients with fall of restorations .And there was no evident difference for clinical effect including fall of restorations , marginal adaptation , secondary caries and edge coloring （ P〉0. 05）.Conclusion：Three methods repairing subgingival wedge-shaped defect has evident efficacy , and gingival retraction paste has more evident effect to control gingiva bleeding after repair .