Int J Oral Maxillofac Implants. 2025 Nov 21;0(0):1-24. doi: 10.11607/jomi.11614. Online ahead of print.
ABSTRACT
PURPOSE: Implant overdenture rehabilitation has recently become a common treatment for patients. However, few papers present long-term observations (over 10 years) of IOD/IRPD. The purpose of this study was to investigate the clinical results of ‘planned’ IOD/IRPD provided at Tsurumi University Dental Hospital over approximately 20 years, as a retrospective cohort study.
MATERIALS AND METHODS: To investigate the clinical results of ‘planned’ IOD/IRPD, a survey was performed regarding patients who had received IOD/IRPD at our University Dental Hospital and underwent regular maintenance between August 2000 and August 2020. The data of ‘rescue’ overdentures, which have poor survival rates, were excluded in this study. Descriptive statistics show the age and gender ratio of the target patients, the length and diameter of the placed implants, implant position and number, denture designs, types of attachment, marginal bone loss (MBL) around implants, implant survival rate, prosthetic complications, and patient satisfaction. Kaplan-Meier curves were computed for IOD/IRPD survival analysis with implant failure as the endpoint, and log-rank tests were used to assess the IOD/IRPD rehabilitation.
RESULTS: The selected patients were 78 (32 males and 46 females). Eighty-six IODs/IRPDs were manufactured-Maxillary: 31 (IODs: 23, IRPDs: 23); and mandibular: 55 (IODs: 35, IRPD: 20). Regarding the survival rate of IOD/IRPDs, measured by the endpoint of implant failure, the survival rate of mandibular implants was significantly higher than that of maxillary implants (p<0.05). However, there was no significant difference between mandibular IOD and IRPD (p>0.05).
CONCLUSIONS: All ‘planned’ IODs/IRPDs were confirmed to maintain successful conditions for 5 years after the commencement of function. Many implant failures were observed in maxillary IODs/IRPDs with mandibular antagonist teeth. Even when biological and prosthetic complications occurred in IODs/IRPDs more than 5 years after function, higher.
PMID:41270267 | DOI:10.11607/jomi.11614
