摘要:
目的 比较深层漂白方案与联合漂白方案3个月的漂白效果、牙齿复色程度及牙齿敏感状况.方法 将30名符合纳入标准的患者随机分为2组,第1组上前牙左侧行联合漂白方案,右侧行深层漂白方案,而第2组上前牙左侧行深层漂白方案,右侧行联合漂白方案.漂白治疗前,治疗结束后1d、7d、30d和90d复诊,使用Olympus Crystaleye电脑比色仪比色,评价漂白效果及牙齿复色情况.分别于漂白治疗前,治疗结束后1 d和7 d,采用Loe&Sillness牙龈指数评价牙龈健康状况,视觉模拟疼痛量表(VAS疼痛评分)评价牙齿和牙龈敏感情况.结果 深层漂白方案漂白效果优于联合漂白方案,但更易发生牙齿敏感,其差异有统计学意义(P0.05).结论 深层漂白方案与联合漂白方案均可获得明显的漂白效果,两者在相同时间内牙齿复色程度相当.深层漂白方案比联合漂白方案漂白效果更好,但更易引起牙齿敏感.%Objective To clinically evaluate the bleaching effect, tooth sensitivity and rebound effect (3-month fol-low-up) of combined bleaching technique and deep bleaching technique. Methods 30 Patients were recruited accord-ing to inclusion and exclusion criteria. Both two dental bleaching techniques, included in-office bleaching followed by at-home bleaching, and at-home bleaching followed by in-office bleaching and at-home bleaching, which were called com-bined bleaching technique and deep bleaching technique, respectively, were performed in the same mouth in each sub-ject. All subjects received at-home bleaching with 6%hydrogen peroxide (HP) for 1 h/d within 7 days on one side of the dental arch (15 on the left side and the other on the right side), and followed by three 8-minute in-office bleaching treat-ments in succession with 35% HP on the maxillary anterior teeth, and finally with identical at-home bleaching on the maxillary anterior teeth. Tooth color was objectively evaluated using Olympus Crystaleye Spectrophotometer at the base-line appointment, and 1st, 7th, 30th and 90th day after treatment. The soft tissues and sensitivity of gingival and hard tooth tissues were evaluated using Loe and Silness Gingival Index and Visual Analog Scale (VAS) at baseline, 1st and 7th day after treatment. Results Significantly less prominent color change and tooth sensitivity were observed in teeth received combined bleaching technique, compared with those received deep bleaching technique (P0.05). Conclusions Both combined bleaching technique and deep bleaching technique show satisfactory effects and the same rebound effect during the same periods of follow-up. Deep bleaching technique is a more effective method of bleaching, however, with high fre-quency of tooth sensitivity.