• Sam Currin posted an update 6 days, 13 hours ago

    Treatments involving oral rehabilitation with overdentures have been widely used by specialists in the oral medicine field. This is an alternative therapy for retention and stability achievement in total prosthesis with conventional treatment, and two implants are enough to establish a satisfactory overdenture. Objective:? The objectives of the study were to evaluate 16 patients of both sexes, with an average age of 47.4?��?4?years, using electromyographic analysis of masseter and temporal muscles and analyse the increase of incisive and molar maximal bite force with their existing complete dentures and following mandibular implant overdenture therapy to assess the benefits of this treatment. Materials and methods:? For these tests, the Myosystem-BR1 electromyograph and the IDDK Kratos dynamometer were used. Statistical analysis was performed using the repeated measures test (SPSS 17.0). Results:? A decrease in electromyographic activity during the rest, lateral and protrusion movements and increase of the maximal incisive and molar bite force after 15?months with a mandibular implant overdenture was observed. Conclusion:? All the patients in this study reported a considerable improvement in the masticatory function and prostheses stability following treatment. It is possible to propose that the use of mandibular implants overdenture should become the selected treatment for totally edentulous patients to facilitate oral function and quality of life. “”doi: 10.1111/j.1741-2358.2011.00515.x Flexural and bond strengths of relined denture polymers assessed by four-point bending tests and Weibull analysis Objectives:? The aim of this study was to (1) investigate the flexural strengths of three denture resins i.e. heat, photopolymerised and microwaved and how it was affected by relining with auto- and visible light�Cpolymerised hard reliners, (2) investigate the bond strengths between denture resins and hard reliners and (3) interpret the results of both tests by utilising Weibull analysis. Materials and methods:? Specimens (65?��?10?��?2.5?mm) from denture resins, relined and bonded combinations were tested using a four-point bending test in a universal testing machine and a crosshead speed of 5?mm/min. Ten specimens for each bulk resin and denture resin�Creliner combination for a total of 150 were tested. Results:? Statistical analysis indicated significant differences between bulk materials (p?<?0.001) and between reliners (p?<?0.001) for flexural and bond strength tests. Conclusion:? It was concluded that (1) the four-point flexural strength was different between the denture base materials, (2) flexure strength between bulk and relined or between relined with autopolymerised and photopolymerised bases was different, (3) flexural strength among relined denture bases was different and (4) bond strengths among relined denture bases were different.