Tokyo Medical and Dental University, Tokyo, Japan.
Clin Oral Implants Res. 2010 Jan;21(1):108-14. doi: 10.1111/j.1600-0501.2009.01809.x. Epub 2009 Oct 21.
No comprehensive patient-centered and clinical evaluations of the functional effect of treatment with implant-supported single crowns (ISSC) have been reported previously.
To investigate whether and how treatment with ISSC affects masticatory function and Oral Health-Related Quality of Life (OHRQoL) in subjects with tooth agenesis.
In nine females and nine males (32 + or - 10 years) with agenesis treated with one to four ISSC (68% in the premolar region), the treatment effect and masticatory function were assessed. The evaluation was performed first after implant placement shortly before crown cementation, and again 1 month after cementation. It consisted of questionnaires [including Oral Health Impact Profile (OHIP-49)] and functional examination with plastic strips, the Dental Prescale Film and the Occluzer system, Xylitol color-changeable gum and slices of Granny Smith apple.
The patients' satisfaction with treatment was high and they experienced a significant overall improvement in their OHRQoL (on average 13% reduction in the total OHIP scores). The cementation of the crowns was associated with a significant increase in the number of near occlusal tooth contacts, contact area, bite force, and masticatory ability and performance. Correspondingly, there was a significant, positive correlation between the number of tooth contacts and (1) occlusal contact area, (2) bite force, and (3) masticatory performance.
Treatment with ISSCs in subjects with tooth agenesis significantly increased masticatory function subjectively and clinically as well as OHRQoL. However, as the functional parameters before replacement of the teeth corresponded to values in subjects with complete dentitions, the functional importance of the increase may be questioned.
目前尚未有关于种植体支持的单冠修复治疗功能效果的全面的以患者为中心和临床评估的报道。
探讨种植体支持的单冠修复（ISSC）治疗是否以及如何影响牙缺失患者的咀嚼功能和口腔健康相关生活质量（OHRQoL）。
本研究共纳入 9 名女性和 9 名男性（32±10 岁），这些患者因牙缺失接受了 1 至 4 个 ISSC 修复（68%在前磨牙区）。在种植体植入后即将牙冠粘结前和粘结后 1 个月，分别评估治疗效果和咀嚼功能。评估内容包括问卷调查（包括口腔健康影响简表[OHIP-49]）和使用塑料条、牙科预调片、咬合器系统、木糖醇变色口香糖和青苹果片进行的功能检查。
患者对治疗的满意度高，其 OHRQoL 总体显著改善（平均总 OHIP 评分降低 13%）。牙冠粘结后，近牙合接触点的数量、接触面积、咬合力和咀嚼能力及效能显著增加。相应地，接触点的数量与（1）牙合接触面积、（2）咬合力和（3）咀嚼效能呈显著正相关。
牙缺失患者接受 ISSC 治疗后，咀嚼功能主观和临床均显著改善，OHRQoL 也显著提高。然而，由于修复前的功能参数与有完整牙列的患者的参数相对应，因此增加的功能的重要性可能值得质疑。
