Efficiency of dental implants retained overdenture of the Royal Dental Implant Project at Chiangrai Prachanukroh Hospital
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Abstract
BACKGROUND: Implant retained overdenture is a good choice for good efficiency of denture function. This study aimed to evaluate the survival rate of dental implants retained overdenture in elderly patients since studies in this group are still limited, further data are need to guide future therapeutic approaches.
OBJECTIVE: To evaluate the efficiency of 2 dental implants retained overdenture on lower arch.
METHODS: This study was a retrospective descriptive study of the dental implants in the Royal Dental Implant Project among elderly patients in Chiangrai Prachanukroh Hospital from 2012-2024 total of 12 years. We evaluated the data including, bleeding index, gingival index, probing pocket depth, mobility and bone loss from periapical radiographic findings as well as dental implants two mandibular over denture and implant combining complete denture. Evaluating the survival rate and patients’ satisfaction score were evaluated. Evaluating the retention of the mandibular overdenture with ball attachment, the survival rate of the dental implant, the complications associated with implant placement in conjunction with complete removable dentures and the prosthodontic complications.
RESULTS: The total of 60 elderly patients was enrolled, 66.7% were male and 33.3% were female. The age of the patients between 68-92 years (average78.7±5.99 years). Most peri-implant clinical assessments revealed the presence of plaque detectable by probing, with 78.3% on the right side and 70% on the left side. Bleeding on probing was observed in 73.3% on the right and 61.7% on the left. Mild gingival inflammation was recorded in 68.3% on the right and 61.7% on the left. Probing depth of 3 mm was found in 40% on the right and 30% on the left. Bone loss not exceeding one-third of the implant length was identified in 58.3% on the right side and 65% on the left side. No implant mobility was detected in the majority of cases, with 96.7% on the right and 91.7% on the left demonstrating stable implants. The most frequently observed prosthodontic complication was tearing of the circular rubber O-ring, occurring in 71.7% of cases, followed by the need for reinforcement of the mandibular denture base in 41.7% of cases. According to the CIP scale, severe complications were identified in 15% of implants, while implant failure occurred in 8.3%. The overall 12 year implant survival rate was 91.7%.
CONCLUSIONS AND RECOMMENDATIONS: The survival rate of Thai dental implants retained overdenture at 12 years was 91.7%. The implants demonstrated a high level of stability and peri-implant bone resorption remained within acceptable limits. Maintaining optimal implant hygiene through proper patient self-care helps reduce plaque accumulation and minimize peri-implant gingival inflammation. Regular follow-up assessments, with the timely replacement of worn components, can prolong the service life of both implants and prostheses, thereby enhancing their long-term effectiveness.
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