Smilelign Clear Aligners

The clear aligner system that gives dentists confidence

UK Manufactured

S4S Dental Lab Expertise

Speak Directly to Technicians

Unlimited Plan Changes

Why dentists across the UK are switching to Smilelign

We believe clear aligner treatment should be accessible, flexible, and always led by dental professionals all without the constraints of paywalls, restrictive software, or overseas labs. Our approach empowers dentists to deliver high quality care with full control over treatment planning and patient outcomes

That’s why Smilelign has supported UK dentists for over 12 years with simple systems, orthodontic expertise, and a human support team that picks up the phone.

Compare Us to Other Aligners

Your aligners, made in the UK for faster turnarounds & better communication

With Smilelign, every aligner is designed and manufactured here in the Sheffield, giving you predictable delivery times, direct access to our team, and a smoother workflow from start to finish. Local production means no overseas delays, clearer communication, and the ability to discuss cases directly with the technicians who understand your patients’ needs. It’s reliable, responsive dentistry… made simpler.

How smilelign works

Amelia Smith –
Head Of Smilelign

Transform Smiles... as easy as ABC with S4S

Align, brighten, and contour… elevate your patients’ results with S4S solutions that work seamlessly together.

More than an aligner: Access a full dental lab with decades of knowledge

Smilelign is created by S4S Dental Laboratory, one of the UK’s most respected and established orthodontic appliance manufacturers. With decades of hands-on experience across aligners, retainers, splints, and more, our team brings a level of clinical understanding that goes far beyond simple aligner production. When you choose Smilelign, you’re backed by a full-service dental lab that knows how to support predictable, stable results.

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Your workflow. Our expertise. Aligners that simply work... with full UK support.

There’s no mandatory training required, full orthodontic support is included, replacement aligners are provided free of charge, and your first case comes with complimentary setup.

Send a scan

from any major scanner or impressions

Approve your plan

in our user-friendly Smile Genius platform

Start treatment

we ship straight to your practice

Ready to grow your practice, increase revenue and patient satisfaction?

We provide a ready-to-go aligner launch pack: posters, seasonal social posts, counter displays and email templates. Want something custom? We’ll build it for you.

Book a Practice Growth Call

We support you every step of the way

We support your team with clear, practical answers. From workflow optimisation to treatment confidence, we help you navigate the questions you’re already asking – so you can focus on delivering exceptional, patient-centred care.

Visit the Clinical Resources

Witness the Transformation Real Dentists, Real Results

Join a growing community of UK dentists who trust Smilelign to deliver confident results for their patients and their practice.

‘I have been a client of S4S for almost 18 years. In that time, I have provided countless splint and snoring devices. When they developed Smilelign, I was keen to explore an alternative to Invisalign; which everyone seemed to be using. Given it was an S4S product, I knew the customer service, professionalism, and quality of the product would be excellent. I was not disappointed. More importantly, the orthodontic results I achieved using Smilelign aligners was as promised on their 3D plan.’

Dr Karnan Nirmalathasan

Karma Dental Care

‘‘I have worked with Smilelign for many years and been very happy. The biggest thing for me is the ability to speak to someone at any time. Of course, the work provided is exceptional, but we can call and speak to admin, a technician or any part of the team to help during any time of the day. I think that is what makes them so different from other laboratories. I would recommend to everyone!’’

Dr Kathryn Houlding

Devonshire Quarter Dental Practice

Enhance Your Expertise with Our Latest Training Courses

Interested in expanding your knowledge of clear aligners? While our courses are optional, they offer valuable insights and practical information to support your professional development and enhance your clear aligner offering.

Smilelign Clear Aligners: The Ultimate Guide to Treatment - Dentist Training Course

Hosted by Dr Caroline Hemington, highly experienced in aesthetic dentistry and a Platinum Smilelign provider, you are taught all you need to know to confidently provide a great orthodontic service to your patients using Smilelign technology – from consultation, right through to retention.

Book your place now