With the intensification of population aging, the number of edentulous patients continues rising. Fixed implant prostheses have become the primary treatment for tooth loss due to their superior chewing efficiency and comfort. However, improper implant prosthetic design may lead to various mechanical and biological complications, and even result in implant failure. Therefore, systematically analyzing the mechanical factors that influence the outcomes of implant restoration and optimizing the design hold significant clinical importance. Finite element analysis, as an effective biomechanical research tool, can simulate the stress distribution in dental implants and bone tissues under different loading conditions, thereby providing a theoretical basis for optimizing implant restoration plans. This review focuses on the impact of factors including implant number, size, shape, inclination angle, framework design and different modeling assumptions on the stress distribution in edentulous implant, aiming to provide references for developing clinically rational implant restoration plans.
ObjectivesTo systematically review the epidemiological characteristics of post-stroke shoulder pain (PSSP).MethodsPubMed, WanFang Data, CNKI, EMbase, The Cochrane Library and SinoMed databases were electronically searched to collect studies on the morbidity of PSSP from inception to November 30th, 2019. Two reviewers independently screened literature, extracted data and assessed risk of bias of included studies, then, meta-analysis was performed by using Stata 15.0 software.ResultsA total of 13 studies were included. The total sample size was 3 514, including 1 357 patients with PSSP. The results of meta-analysis showed that the total morbidity of PSSP was 45.0% with 95%CI 32.0% to 58.0%. The results of subgroup analysis showed that the morbidity of PSSP was 55.5% (95%CI 48.1% to 63.0%) prior to 2010 and 40.6% (95%CI 28.3% to 52.9%) after 2010, respectively. The morbidity of PSSP in Asia was 61.2% (95%CI 51.3% to 71.1%), and in Europe and America was 18.4% (95%CI 9.9% to 26.9%), respectively.ConclusionsCurrent evidence suggests that PSSP has high morbidity, and it may be affected by regional factors. Due to limited quality and quantity of the included studies, more high quality studies are required to verify above conclusions.
