Strain Distribution in a Kennedy Class I Implant Assisted Removable Partial Denture Under Various Loading Conditions.

Strain Distribution in a Kennedy Class I Implant Assisted Removable Partial Denture under Various Loading Conditions.

Int J Dent. 2013; 2013: 351279
Shahmiri R, Aarts JM, Bennani V, Das R, Swain MV

Purpose. This in vitro study investigates how unilateral and bilateral occlusal loads are transferred to an implant assisted removable partial denture (IARPD). Materials and Methods. A duplicate model of a Kennedy class I edentulous mandibular arch was made and then a conventional removable partial denture (RPD) fabricated. Two Straumann implants were placed in the second molar region, and the prosthesis was modified to accommodate implant retained ball attachments. Strain gages were incorporated into the fitting surface of both the framework and acrylic to measure microstrain ( ? Strain). The IARPD was loaded to 120Ns unilaterally and bilaterally in three different loading positions. Statistical analysis was carried out using SPSS version 18.0 (SPSS, Inc., Chicago, IL, USA) with an alpha level of 0.05 to compare the maximum ? Strain values of the different loading conditions. Results. During unilateral and bilateral loading the maximum ? Strain was predominantly observed in a buccal direction. As the load was moved anteriorly the ? Strain increased in the mesial area. Unilateral loading resulted in a twisting of the structure and generated a strain mismatch between the metal and acrylic surfaces. Conclusions. Unilateral loading created lateral and vertical displacement of the IARPD. The curvature of the dental arch resulted in a twisting action which intensified as the unilateral load was moved anteriorly. HubMed – rehab



Respir Care. 2013 Jun 4;
Ortega F, Márquez-Martín E, Valencia B, Cejudo P, Rodriguez A, López-Camposa JL, Barrot E

Background:Bronchial variability in COPD patients may be a phenotypic feature associated with clinical characteristics and differential treatment response.Objectives:We analysed whether symptoms, quality of life and exercise capacity varied in COPD patients as a function of bronchodilator test results. Further, we compared response to an exercise programme in the groups.Methods:A positive bronchodilator test result was defined as FVC and/or FEV1>12% plus >200 ml improvement after 400 ?g salbutamol. We studied 198 COPD patients, 94 with positive reversibility and 104 with negative reversibility. Training sessions were carried out on three non-consecutive days each week for 12 weeks, and consisted of a combination of resistance and strength training. Subjects were evaluated on two consecutive days at baseline, and at the end of the 12-week training programme.Results:Those with positive reversibility had shorter time-to-exhaustion on the endurance test (19.1±12.6 min versus 24.5±14.5 min in negative reversibility patients; p<0.031), shorter distances in the shuttle walking test (380.6 ± 158.2 m versus 438.5±149.1 m in negative reversibility patients; p<0.029) and lower scores on the Chronic Respiratory Disease Questionnaire (18.7±4.6 versus 19.8±4.3 in negative reversibility patients; p<0.015), while we found no significant differences in peak exercise, peripheral muscle strength or dyspnoea. Further, differences between groups in improvements after exercise training were not significant.Conclusions:Compared to COPD patients with negative reversibility, those with positive reversibility walk for shorter distances, and have shorter endurance times and a worse quality of life, but improvements after exercise training are similar. HubMed – rehab


Priorities for mental health research in Europe: A survey among national stakeholders’ associations within the ROAMER project.

World Psychiatry. 2013 Jun; 12(2): 165-70
Fiorillo A, Luciano M, Del Vecchio V, Sampogna G, Obradors-Tarragó C, Maj M,

Within the ROAMER project, funded by the European Commission, a survey was conducted with national associations/organizations of psychiatrists, other mental health professionals, users and/or carers, and psychiatric trainees in the 27 countries of the European Union, aiming to explore their views about priorities for mental health research in Europe. One hundred and eight associations/organizations returned the questionnaire. The five most frequently selected research priorities were early detection and management of mental disorders, quality of mental health services, prevention of mental disorders, rehabilitation and social inclusion, and new medications for mental disorders. All these areas, except the last one, were among the top ten research priorities according to all categories of stakeholders, along with stigma and discrimination. These results seem to support the recent argument that some rebalancing in favor of psychosocial and health service studies may be needed in psychiatric research. HubMed – rehab