If you want straighter front teeth fast, two systems dominate the conversation: Six Month Smiles, which uses tooth-coloured fixed braces, and Spark Aligners, a near-invisible clear tray system. At Ollie & Darsh in the heart of Liverpool, both are offered, and the choice usually comes down to your bite, your timeline, and how visible you’re willing to be. As of June 2026, here’s an honest comparison.
There’s an unusual reason to read this from us specifically. Daz Singh, our Clinical Director, isn’t just a dentist who uses Six Month Smiles. He’s a Clinical Instructor and Mentor for the system, which means he teaches other dentists how to deliver it. When the person comparing two options actually trains people in one of them, you tend to get a straighter answer.
The quick version
Stay with me, because the headline difference is simple.
Six Month Smiles uses clear brackets and tooth-coloured wires fixed to your teeth, working quietly in the background while you get on with life. Spark Aligners is a series of removable clear trays you swap every week or two, taking them out to eat and clean.
One is fixed and discreet. The other is removable and almost invisible. Both are designed for the front teeth that show when you smile, not for major bite overhauls.
How the two systems compare
Where Six Month Smiles wins
Here’s a truth the aligner adverts skip over. Removable only works if you actually wear it. Spark Aligners need to be in your mouth 20 to 22 hours a day, and if you’re the kind of person who’ll leave them in a napkin at lunch and forget, your treatment stalls.
Six Month Smiles takes that decision away. Once it’s on, it’s working, twenty four hours a day, no willpower required. The brackets are clear and the wires tooth-coloured, so at conversational distance most people won’t notice. For some bite movements, fixed braces also give the dentist more direct control over precise tooth positioning than trays do.
And because Daz Singh teaches this system at instructor level, the techniques he uses on your case are the same ones he passes on to other clinicians. That’s a level of familiarity worth having on your side.
Where Spark Aligners wins
Now the other side. For the busy professional who walks into the boardroom every day, near invisibility can be the whole point. Spark trays are clear and sit close to the teeth, so most people genuinely won’t spot them across a meeting table.
They come out for meals, which means no food traps and no change to what you eat. Cleaning is easier too: you brush and floss normally, then pop the trays back in. For weddings or big events, you can briefly remove them for photographs. The trade-off, again, is discipline. They only work if you’re honest about wearing them.
Which one is right for you?
Both treat the front teeth that show, and both are quicker than traditional full orthodontics because they’re not trying to rebuild your whole bite. So the decision rarely comes down to the teeth alone. It comes down to you.
Choose Six Month Smiles if you’d rather not think about it once it’s on, if you know you won’t keep trays in faithfully, or if your case suits the control fixed braces give. Choose Spark Aligners if invisibility is your priority and you’re disciplined about wear time.
The honest answer is that an assessment settles it in minutes. Daz Singh looks at your teeth, your bite, and your daily routine, then tells you which actually suits you, rather than which is easier to sell. You can read about the practice’s wider approach on the why Ollie & Darsh page.
What does short-term orthodontics cost in Liverpool?
Both systems sit in a similar range. As a general UK guide, short-term orthodontic treatment such as Six Month Smiles or Spark Aligners typically costs from around £2,000 to £4,500, depending on how much movement is needed and how many arches are treated.
Your exact fee is confirmed after your assessment, because it depends on your specific case. Ollie & Darsh is FCA authorised for 0% finance and offers membership plans, so you can spread the cost into manageable monthly payments. The details are on the 0% finance page.
FAQ
Is Six Month Smiles or Spark Aligners faster?
They’re broadly similar, and both are far quicker than traditional braces because they focus on the front teeth rather than your full bite. Six Month Smiles usually runs around four to nine months, Spark Aligners around four to twelve. Spark can take longer if trays aren’t worn for the full 20 to 22 hours a day, since that slows progress. Your timeline is confirmed at assessment.
Are Spark Aligners really invisible?
They’re close. Spark trays are clear, thin, and sit snugly against the teeth, so most people won’t notice them in normal conversation or across a meeting room. They’re not literally invisible up close, but they’re far more discreet than metal braces. For anyone self-conscious about appearance at work, that discretion is often the deciding factor over fixed options.
Does it matter that the dentist teaches Six Month Smiles?
It helps. Daz Singh at Ollie & Darsh is a Clinical Instructor and Mentor for Six Month Smiles, meaning he trains other dentists in the system. The techniques he teaches are the ones he uses on your case, so you get a clinician working at instructor level rather than someone who delivers the system occasionally. That depth of familiarity supports better planning.
Can these systems fix my bite, or just straighten front teeth?
Both are designed mainly for the front teeth that show when you smile, the cosmetic zone, rather than for major bite corrections. If your case involves a significant bite problem, Daz Singh may recommend a different orthodontic route. The only way to know which category you fall into is an assessment, where your bite is checked properly before any plan is set.
Will I need a retainer afterwards?
Yes, with both systems. Teeth have a natural tendency to drift back towards their old position after any orthodontic treatment, so a retainer holds your new alignment in place. This is standard for Six Month Smiles and Spark Aligners alike. Daz Singh will explain your retainer options at the end of treatment, and wearing it as advised protects the result you paid for.
What to do next
The real answer to “which one” comes from looking at your actual teeth, not a comparison table. Book an assessment with Daz Singh at Ollie & Darsh in Liverpool, and you’ll leave knowing which system suits your bite, your lifestyle, and your timeline.
Call 0151 236 6578 or book through the contact page. Evening appointments are available, with a 7 PM finish Monday to Friday, so you can come straight after work.