Abstract
The aim of this non-randomized controlled clinical trial was to evaluate the oral health-related quality of life and masticatory efficiency of patients rehabilitated with mandibular two-implant overdentures with immediate loading or conventional dentures. Fifty completely edentulous patients wearing bimaxillary conventional dentures, for at least one year, were recruited. The patients were then assigned to either two treatment groups: mandibular overdentures supported by two implants with bar-clip system and a maxillary conventional denture (n = 25), and new maxillary and mandibular conventional complete dentures (n = 25). Masticatory efficiency and oral health-related quality of life were assessed before and 3 months after denture insertion. The Brazilian version of OHIP-Edent questionnaire was used to assess the oral health-related quality of life. Masticatory efficiency was evaluated with chewing capsules through a colorimetric method. The results revealed fewer oral health-related quality of life problems in patients wearing mandibular two-implant overdentures compared to the conventional dentures group. In addition, the implant overdenture group presented statistically significant improvement in masticatory efficiency (p = 0.001). There was no correlation between masticatory efficiency and OHIP in the implant group (p > 0.05), however a correlation was found in the conventional denture group (p < 0.05). Therefore, these short-term results suggest that mandibular overdenture retained by 2 implants with immediate loading combined with maxillary conventional dentures provide better masticatory efficiency and oral health-related quality of life than mandibular conventional dentures.
Highlights
Oral rehabilitation using a 2-implant overdenture (IOD) is a widely discussed topic
Masticatory efficiency and oral health–related quality of life were evaluated before treatment at both groups, 3 months after rehabilitation with new conventional dentures at CD group, and 3 months after insertion of new conventional maxillary denture and mandibular overdenture at IOD group
Twenty-five individuals (22 women and 3 men; mean age 57.2 years) were treated with maxillary CD and mandibular IOD with barclip system, and the other twenty-five patients (19 women and 6 men; mean age 57.8 years) were rehabilitated with new maxillary and mandibular CDs. Both groups were edentulous for similar number of years; 22.7 and 22.4 years, for IOD and CD groups, respectively
Summary
Oral rehabilitation using a 2-implant overdenture (IOD) is a widely discussed topic. Current studies have recommended this treatment approach for the edentulous mandible. Only a few studies have used this questionnaire to compare the oral health-related quality of life among users of overdentures and conventional complete dentures[11,12]. In a meta-analysis systematic review, the authors included 10 publications of 7 clinical trials comparing the effect of mandibular rehabilitation with conventional denture or implant-retained overdenture on satisfaction and oral health-related quality of life[13]. The present study evaluated rehabilitation with immediately loaded overdentures, and the inclusion of a control group provided an innovative experimental design. The aim of this non-randomized controlled clinical trial was to evaluate the oral health-related quality of life and masticatory efficiency of patients rehabilitated with mandibular IOD or CD. The findings may be helpful in making clinical decisions about rehabilitation of mandibular edentulous patients with immediately loaded implant-supported overdentures
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