Dr Sam Ahir

Blog by Dr Sam Ahir

The importance of post-curing in 3D printing for dental applications


3D printing continues to gain ground in the field of dental applications, but work remains to obtain a complete picture of how their final properties are formed during the post-curing stage, most crucially for the development of reliable appliances. These methods, known as additive methods, demand f...

Dr Sam Ahir
23.10.24 07:46 AM - Comment(s)
Advances in 3D printing technology for medical applications


3D printing is a technology that can be used to quickly fabricate components of complex morphologies through the use of computational input. Accordingly, the use of computer-aided design (CAD) models of computed tomography (CT) scans can be employed as the basis for the 3D printing of medical equipm...

Dr Sam Ahir
23.10.24 07:42 AM - Comment(s)
Techniques for 3D-printed biomedical sensors


The use of biomedical sensors for the measurement of physiological parameters in humans is now long-established. Micro- and nano-sensors that have been employed so far have been built on silicon-based substrates, but these present many disadvantages in terms of temperature, signal/noise consideratio...

Dr Sam Ahir
23.10.24 07:40 AM - Comment(s)
Vitrimers – A Route from Commodity Plastics to High-Value Materials


Vitrimers are emerging as a spin-off class of plastic polymer that may challenge the traditional division of polymers into thermoplastics and thermosets. They represent a class of versatile, sustainable second-generation dynamic networks that can be accessed by high-temperature functionalisation of ...

Dr Sam Ahir
23.10.24 07:38 AM - Comment(s)
A review of the 3D printing landscape for medical applications


Polymer 3D Printing Review: Materials, Process, and Design Strategies for Medical Applications

3D printing is a growing and sophisticated set of technologies that furnish access to a huge universe of contemporary design structures that may incorporate materials of conflicting properties to optimal ef...

Dr Sam Ahir
23.10.24 07:23 AM - Comment(s)
PMMA polymer bead manufacture and applications


Poly(methyl methacrylate) (PMMA), better known as acrylic, is a transparent plastic with a range of properties that make it suitable for a wide range of uses.

Not all PMMA beads are created equal. PMMA is typically produced via suspension polymerisation from a monomer, methyl methacrylate (MMA), into...

Dr Sam Ahir
23.10.24 07:20 AM - Comment(s)
Improving glass transition temperatures of PMMA


For polymeric materials, like Poly(methyl methacrylate), the glass transition temperature (Tg) plays an important role in making them suitable for a variety of applications. They are capable of governing the both mechanical and physical characteristics of them. However, the thermal events are not fu...

Dr Sam Ahir
22.10.24 06:43 AM - Comment(s)
How statistics can guide better business decisions


We make thousands of decisions every day. For some of the more mundane, we barely realise we’re making them. In business, we sometimes dwell on decisions for hours, days, or even months. We know that these decisions have the power to change the course of our business, so it’s important that we get t...
Dr Sam Ahir
22.10.24 06:41 AM - Comment(s)
3D printing restorative dental materials: are stereolithographic techniques the answer?


The dental industry is investing heavily in the use of additive manufacturing, or 3D printing, as a more cost effective and sustainable method of producing dentures from medical-grade restorative materials. Most of the most well-known dental companies have a 3D printing research programme, with a vi...

Dr Sam Ahir
22.10.24 06:39 AM - Comment(s)
Research presents first enzyme cleavable scaffolds

An interview with Professor Julian Jones, Professor of Biomaterials and Tissue Engineering, Imperial College London.

In the field of regenerative medicine, there is an unmet clinical need for scaffolds that are capable of load sharing alongside host tissue, whilst biodegrading at a predictable rate u...

Dr Sam Ahir
22.10.24 06:35 AM - Comment(s)
Composite acrylic formulations require new modelling approach, research reveals


Shrinkage during UV curing of monomer mixtures is more complex than previously thought, to the extent that the theoretical calculations currently used to predict shrinkage in single monomer mixes by manufacturers formulating their own liquids may no longer apply.

This is according to a paper, Ev...

Dr Sam Ahir
22.10.24 06:31 AM - Comment(s)
Anethole copolymerisation: a step closer to sustainable bio-based polymers


Increasing business, consumer and regulatory pressures are accelerating the drive for sustainable materials. The plastics and polymer industries are no exception, as the use of natural bio-based monomers derived from renewable biomass resources increases. 

Despite the large variety and diversity...

Dr Sam Ahir
22.10.24 06:30 AM - Comment(s)
Sculpting nail systems: what is important and why?


An innovation with its roots in the dental acrylics industry, artificial acrylic nails were first created back in the fifties. In the decades since then, there have been major scientific and engineering innovations taking the industry forward. During the 1970s, we saw the development of liquid-powde...
Dr Sam Ahir
22.10.24 06:28 AM - Comment(s)
Dipping Nail Systems: Why the chemistry behind the system is crucial to end-product quality


Acrylic nails were originally developed in the 1950s, initially as a spin-out from the dental acrylics industry. The science behind these nails has significantly advanced since then, with the introduction of major product innovations such as the liquid-powder systems in the 1970s, the explosion of c...

Dr Sam Ahir
22.10.24 06:21 AM - Comment(s)
Nail polymers: colour stability and ultra-high clarity


Artificial acrylic nails are designed to make the wearer look amazing, whatever the circumstances. Whether dipped or sculpted, the highest quality acrylic nail powders must have fundamental properties that keep the final artificial nails looking beautiful.

These include consistent colour dispersal, c...

Dr Sam Ahir
22.10.24 06:13 AM - Comment(s)