基于牙龈生物型探究肾上腺素对牙龈的影响

Study on the effect of adrenaline on gingiva based on the gingival biotype

目的基于牙龈生物型探究使用肾上腺素排龈线5 min后对牙龈的影响。方法2015年6~12月,从北京航空总医院实习生中选择符合入选条件的厚龈型与薄龈型各15名志愿者,将其双侧上颌中切牙(共60颗)作为研究牙齿。每名志愿者左、右中切牙分别放置肾上腺素排龈线和不含药排龈线进行颊侧排龈处理,于排龈前、排龈后5 min、1 d、3 d、7 d、14 d分别用数显游标卡尺测量切端至游离龈缘的距离,每次均测3遍,所得数值取均数作为最终数据。结果 (1)薄龈型使用不含药排龈线3 d后切端至游离龈缘的距离与排龈前相比,差异无统计学意义(P>0.05),使用肾上腺素排龈线7 d后与排龈前相比,差异无统计学意义(P>0.05)。(2)使用肾上腺素排龈线后,薄龈型7 d后切端至游离龈缘的距离与排龈前相比,差异无统计学意义(P>0.05);厚龈型3 d后与排龈前相比,差异无统计学意义(P>0.05)。(3)使用肾上腺素排龈线后,薄龈型在5 min、1 d、3 d的退缩距离与排龈前切端至龈缘距离的比值均大于厚龈型,差异有统计学意义(P<0.05)。结论 (1)相对于不含药排龈线,薄龈型使用肾上腺素排龈线5 min后,龈缘恢复到之前的高度所需要的时间更长;(2)无论是厚龈型还是薄龈型,肾上腺素排龈线放置5 min均不会对牙龈造成永久损伤;(3)放置肾上腺素排龈线5 min后立即取出,此时薄龈型比厚龈型退缩距离大。

Objective To study the effect on gingival after treating with retraction cord of adrenaline for 5 minutes based on the gingival biotype. Methods From June to December in 2015, 15 internships with thick type and 15 internships with thin type from Beijing Aviation General Hospital were selected as volunteers, their bilateral maxillary central incisors were selected as experimental objects. Gingival retraction was performed by placing retraction cords with or without adrenaline on left and right maxillary central incisor respectively. The distance from incisal to free gingival margin of each sample was measured 3 times by vernier caliper before gingival retraction and 5 minutes, 1 day, 3 days,7 days and 14 days after gingival retraction. The average value of the data measured above was taken as the final data.Results（1）There was no significant difference in the distance from incisal to free gingival margin between 3 days after gingival retraction and before gingival retraction when treated with retraction cord of non-drug in thin type（P〈0.05）.（2）There was no significant difference in the distance from incisal to free gingival margin between 7 days after gingival retraction and before gingival retraction when treated with retraction cord of adrenaline in thin type（P〈0.05）. There was no significant difference in the distance from incisal to free gingival margin between 3 days after gingival retraction and before gingival retraction when treated with retraction cord of adrenaline in thicktype（P〈0.05）.（3）After treated with retraction cord of adrenaline, the ratio of gingival recession distance to the distance from incisal to free gingival margin of thin typewere significantly changed compared with thick type at 5 mintues, 1 day and 3 days（P〈0.05）.Conclusion（1）It takes longer time for the gingival margin to recover the previous height in thin type when treats with retraction cord of adrenaline for 5 minutes compares with retraction cord of non-drug.（2）No matter thick or thin type,the treatment with retraction cord of adrenaline for 5 mintues will not cause permanent damage to the gingiva.（3） The gingival recession distance of thin type is longer than thick type when treats with retraction cord of adrenaline for 5 minutes.