background and aims. all-on-four technique involves the use of tilted implants to allow for shorter cantilevers. this finite element analysis aimed at investigating the amount and distribution of stress in maxillary bone surrounding the implants with all-on-four vs. frequently used method with six implants technique using different numbers and inclination angles. materials and methods. a 3d ede...

objective: the aim of this study was to evaluate and compare the status of supporting tissue around implant-supported fixed partial denture with or without cantilever clinically and radiographically during a four-year period. materials and methods: one hundred and fifty nine patients who were treated by 482 implants supported fixed partial prosthesis with and without cantilever after at least f...

provisional cements are commonly used to facilitate retrievability of cement-retained fixed implant restorations; but compromised abutment preparation may affect the retention of implant-retained crowns.the purpose of this study was to investigate the effect of abutment design and type of luting agent on the retentive strength of cement-retained implant restorations.two prefabricated abutments ...

objective: the aim of our study is to determine the impact of cochlear implantation on anxiety anddepression in mothers of children with cochlear implant. materials and methods: in a cohort design, 35 mothers of deaf children with cochlear implantion admitted to the clinic of baqiyatallah hospital during january 2008 – january 2010 were selected through systematic sampling. information of demog...

background: breast implant associated anaplastic large t- cell lymphoma is a rare type of non-hodgkin lymphoma, with a reported incidence of 0.3% per 100,000 women with breast prosthesis per year. it presents most commonly as a peri-implant seroma, but may also present as a capsular mass, tumor erosion through skin, in a regional lymph node, or found incidentally during revision surgery. case p...

longevity of osseointegrated implants are intensely influenced by biomechanical factors. control of these factors prevents mechanical complications, which include fracture of screws, components, or materials veneering the framework. in this study, the impact of length and threads pitch of dental implants on the stress distribution and maximum von mises stress in implant-abutment complex and jaw...

purpose: to compare complications and motility of hydroxyapatite versus medpor ocular implants after enucleation at ahvaz imam hospital (from jan 2010 to jun 2011). methods: in a clinical trial, 50 patients scheduled for enucleation were randomly divided in two groups of 25 patients. group 1 underwent enucleation + hydroxyapatite (ha) and group 2 underwent enucleation + medor implant. all patie...

pre-implant disease is an inflammatory process that affects the surrounding tissues of a functional osseointegrated implant. it is usually the result of a disequilibrium between the micro-flora and the defense system. this case reports a 57-year-old man with unusual bone loss around dental implants. this was an unusual case of peri-implantitis that occurred only in the implants on one side of t...

introduction : supplementation with minerals like calcium has been shown to be effective in preventing bone loss and increasing bone density. thus, it can be assumed that if calcium supplementation is paired with bisphosphonates, greater benefit can be achieved. in this context, we decided to perform this animal study on ovariectomized rats to assess whether bisphosphonate supplemented with cal...

a cochlear implant is an implanted electronic device used to provide a sensation of hearing to a person who is hard of hearing. the cochlear implant is often referred to as a bionic ear. this paper presents an undecimated wavelet‑based speech coding strategy for cochlear implants, which gives a novel speech processor. the undecimated wavelet packet transform (uwpt) is computed like the wavelet ...