Articles

Laser Hermetic Welding in Implantable Medical Devices: A Comprehensive Review of Techniques, Parameters, Defects, and Reliability

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In order to protect delicate microelectronic devices from moisture-related malfunctions when exposed to the internal environment of the human body, hermetic sealing is necessary for implantable medical devices (IMDs). Due to its accuracy, automation potential, and low heat effect, laser hermetic welding has become the most popular joining technique in the manufacturing of medical devices. The application of laser hermetic welding to IMDs is thoroughly examined in this review, with particular attention paid to welding methods, crucial process variables, weld flaws, and hermeticity testing. It also describes present issues and potential paths forward for improving device performance, dependability, and miniaturization. For engineers, researchers, and manufacturers of medical devices looking to maximize hermetic packaging techniques, the review is a technical resource.

Impact of the Surface Properties of Medical Implants on Host Response

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The aim of this literature review is to analyze various implant properties and their association with host response and biocompatibility. Based on the electronic search of journals, books published in pubmed, google scholar and Elsevier, necessary data was collected and analyzed. The various properties of biomaterial and their modifications to make them acceptable by the body has been discussed. Various materials with different surface characteristics, design and modification techniques are analyzed. The overall study revealed, implant material need to have different properties based on the site of implant and intended use. Mostly metals with smooth surface showed good biocompatibility in dental and bone implants while ceramics and polymers which are highly porous had better results in vascular and implant site with more soft tissues.