Abstract
Background and objectives: To compare the medium- to long-term mechanical behavior of overdentures with two different retention systems: overdentures with Locator® axial retention, and vertical insertion overdentures with bar retention, used to rehabilitate edentulous maxillar. Material and Methods: This prospective study assessed patients presenting complete maxillary edentulism, rehabilitated by means of implant-supported overdentures (n = 20), 10 with Locator® axial retention (ODA group) and 10 with overdentures on bars (ODB group). Patients also completed a questionnaire to determine their satisfaction with treatment. Results: The mean follow-up time in both groups was 11.4 years, with follow-up times in both groups ranging from 5 to 14 years. The ODA group suffered mechanical complications such as retention loss, need for nylon retention insert changes, resin fracture, and need for relining. In the ODB group, prosthetic dental wear, screw loosening, and complete prosthetic failure were more common. A total of 19 implants failed (23.8%); of these, 11 were in the ODA group (failure rate = 27.5%) and eight in the ODB group (failure rate = 20%). The patient satisfaction questionnaire obtained a mean score of 7.9 out of 10 in the ODA group, and 9.75 in the ODB group. Conclusions: in rehabilitations of edentulous maxillar by means of implant-supported overdentures, both the systems assessed were shown to be effective in the medium to long term. Patients expressed a high level of satisfaction with the treatments received.
Highlights
The general population is aging so that by 2015 around 16% will be aged 65 years or over, in comparison with 9% in 2019 [1]
Taking an overall view of the results, comparing events or complications between the two types of retention (Table 1), the ODA group suffered more problems related to retention loss, retention insert changes, resin fracture, and relining while the ODB group suffered more prosthetic dental wear, screw loosening, and complete prosthetic failure, differences were nowhere near statistical significance (Figure 2)
The results obtained for each group were as follows: a total of 19 implant failures (23.8%); of these, 11 were in the ODA group, and eight in the ODB group
Summary
The general population is aging so that by 2015 around 16% will be aged 65 years or over, in comparison with 9% in 2019 [1]. The report predicts that, in Europe, the population aged over 60 years will reach 33.6% by 2050. In light of this increase in life expectancy, dental care needs in this age group are bound to grow. Material and Methods: This prospective study assessed patients presenting complete maxillary edentulism, rehabilitated by means of implant-supported overdentures (n = 20), 10 with Locator®axial retention (ODA group) and 10 with overdentures on bars (ODB group). The patient satisfaction questionnaire obtained a mean score of 7.9 out of 10 in the ODA group, and 9.75 in the ODB group. Conclusions: in rehabilitations of edentulous maxillar by means of implant-supported overdentures, both the systems assessed were shown to be effective in the medium to long term
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