Implant design refers to the three-dimensional structure of the implant, with all the elements and characteristics that compose it. Dental implants are subjected to various force magnitudes and directions during function. Because implants function to transfer occlusal loads to the surrounding biologic tissues, functional design objectives should aim to manage biomechanical loads to optimize the...

Nowadays total joint replacements are widely used in the world, so in average 800,000 joint surgeries are done yearly only in Europe and North America. However implant loosening is and remains as the major issue of all implant failures and therefore causes revision surgery procedures. Studies and experiments have identified poor fixation of implants most likely is the main cause of long term im...

background and aims. the purpose of this study was to evaluate initial force and force decay of commercially available elastomeric ligatures and elastomeric separators in active tieback state in a simulated oral environment. materials and methods. a total of 288 elastomeric ligatures and elastomeric separators from three manufacturers (dentaurum, rmo, 3m unitek) were stretched to 100% and 150% ...

background and aims. the aim of this study was to determine the stress patterns within an implant and the effect of different types of connections on load transfer. materials and methods. three different types of implant-abutment connections were selected for this study. sample a: 1.5-mm deep internal hex corresponding to a lead-in bevel; sample b: a tri-channel internal connection; and sample ...

objective: the present study aimed to investigate the effects of group positive psychotherapy on increasing the happiness of mothers of children with cochlear implants.  methods: this study was a quasi-experimental research with pretest-posttest, a control group, and a 75-day follow-up design. a total of 20 mothers of children with cochlear implants treated in baqiyatallah hospital of tehran ci...

introduction: introduction: few studies have investigated the distribution of stress around implants. in this study the distribution of stress in bones around implants was investigated in five overdenture (od) treatment designs including od-1, od-2, od-3, od-4 and od-5. materials and methods: the catia modeling software was used in order to simulate the tooth/implant model and bone. first, the ...

background: jaw bone quality plays an essential role in treatment planning and prognosis of dental implants. regarding several available methods for bone density measurements, they are not routinely used before implant surgery due to hard accessibility. objective: an in vitro investigation of correlation between average gray scale in direct digital radiographs and hounsfield units in ct-scan pr...

background : the number of children with cochlear implants who have other difficulties such as attention deficiency and cerebral palsy has increased dramatically. despite the need for information on the results of cochlear implantation in this group, the available literature is extremely limited. we, therefore, sought to compare the levels of auditory perception in children with cochlear implan...

Implant rehabilitation is a daily practice in dentistry, and patients often have heightened expectations regarding both the functional aesthetic outcome. Implant–abutment connection (IAC) involved long-term quality of rehabilitation. The use one-piece implants for fixing dentures may prevent mechanical biological implication implant–abutment interface, resulting better hard soft tissue maintena...