Masticatory performances and maximum occlusal forces of immediate and conventional loaded two-implant supported overdentures retained by magnetic attachments: preliminary study of randomized controlled clinical trial

International Journal of Implant Dentistry

Manabu Kanazawa¹  Yoko Uehara¹  Awutsadaporn Katheng¹  Yuriko Komagamine¹  Anna Miyayasu¹  Shunsuke Minakuchi¹  Daisuke Sato² 

[1] Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University;Department of Implant Dentistry, School of Dentistry, Showa University;

关键词: Immediate load;    Conventional load;    Masticatory performance;    Overdenture;    Magnetic attachment;    Edentulous mandible;   

DOI  :  10.1186/s40729-021-00342-x

来源: DOAJ

【 摘 要 】

Abstract Background The appropriate loading protocol to improve masticatory performance (MP) is still unclear in elderly patients and two-implant overdentures (2-IODs) wearers. This study aimed to compare the long-term MP and maximum occlusal force of immediate loading (IL) and conventional loading (CL) of 2-IODs retained by magnetic attachments. Nineteen edentulous patients were randomly assigned to either an IL (n=10) or CL group (n = 9). In the IL group, the implant was loaded on the same day as insertion, whereas it was loaded 3 months after insertion in the CL group. Magnetic attachments were used to retain all overdentures to the implants. MP, measured by a piece of color-changeable chewing gum and a gummy jelly test, and maximum occlusal force, measured using an occlusal force measuring device, were assessed in both groups at baseline and at 3-, 4-, and 5-year follow-ups. Results No significant differences were observed in the MP and the maximum occlusal force between the IL and CL groups at any time point. However, a significantly higher MP was observed at the 3-year time point in the IL group (P = 0.036). The maximum occlusal force revealed a significant correlation with MP, both with the color-changeable chewing gum and gummy jelly at 5 years. Conclusion After long-term observation, no significant differences in MP and maximum occlusal force were observed between the IL and CL groups. However, compared to pre-implant insertion of the complete denture, the MP in the IL group significantly improved at 3 years. Furthermore, the maximum occlusal force was significantly correlated with MP at 5 years. Trial registration UMIN, UMIN000009889 . Registered on 28 January 2013.

【 授权许可】

Unknown