Straightening your teeth no longer requires metal brackets, wires, or years of discomfort. Since its FDA approval in 1998, Invisalign has become the most widely used clear aligner system in the world, treating over 18 million patients across more than 100 countries.
So how does Invisalign work? The system straightens teeth using a series of custom-made, removable clear aligners that apply precise, controlled pressure to specific teeth, shifting them gradually into their correct positions without a single bracket or wire.
Understanding exactly how the process works, from your first consultation to your final retainer, helps you go into treatment with accurate expectations, better compliance, and results that last.
What Conditions Does Invisalign Treat?
Invisalign is clinically effective for a wide range of orthodontic issues, including:
- Crowded teeth
- Gapped or spaced teeth
- Overbite and underbite
- Crossbite
- Open bite
- Mild to moderate malocclusion
Invisalign is suitable for both teens and adults, including Invisalign Teen, with no upper age limit for treatment. For patients with bite correction needs, Invisalign treatment can also improve jaw alignment and facial symmetry over the course of treatment. Invisalign is one of several cosmetic dentistry treatments at Arlington Dental Excellence designed to enhance both the appearance and function of your smile. For complex cases requiring significant tooth movement, Dr. Layth Ghanim will evaluate whether Invisalign alone is sufficient or whether a combined approach delivers better long-term results.
The Science Behind How Invisalign Moves Your Teeth
Your teeth are not fixed rigidly in bone. Each tooth root is connected to the surrounding jawbone by the periodontal ligament, a flexible tissue that responds to sustained pressure. When an Invisalign aligner applies gentle, constant force to a tooth, two simultaneous biological processes occur. On the pressure side, bone gradually breaks down through a process called resorption. On the opposite side, new bone forms to fill the space, a process called deposition. This natural remodelling cycle allows teeth to shift safely and predictably into new positions.
Invisalign aligners are manufactured from SmartTrack, a proprietary thermoplastic material engineered to deliver consistent, calibrated force throughout each wear period. SmartTrack applies gentler, more continuous pressure than older aligner plastics, improving comfort and making tooth movement more predictable throughout treatment.
How Does Invisalign Work Step by Step?
From your first scan to your final retainer, every stage of Invisalign treatment is planned with precision and built around your specific smile goals.
Step 1: Consultation and Eligibility Assessment
Your Invisalign journey begins with a comprehensive consultation with Dr. Layth Ghanim, who brings 38 years of expertise in cosmetic and orthodontic dentistry. He examines your teeth, reviews your bite, and takes digital X-rays to determine whether Invisalign is the right treatment for your specific case. In some situations, preliminary procedures such as tooth extraction may be needed to create adequate space for teeth to move into proper alignment.
Step 2: Digital 3D Scanning
Arlington Dental Excellence uses the iTero digital scanner to create a precise 3D model of your mouth, capturing every detail of your bite and tooth position without the need for messy physical impressions. This digital model forms the foundation of your custom treatment plan.
Step 3: ClinCheck Treatment Planning
Using Invisalign’s proprietary ClinCheck software, Dr Ghanim maps out every planned tooth movement across the full course of your treatment. Before your aligners are manufactured, you see a digital preview of exactly how your teeth will move at each stage and what your final smile will look like. This allows you to review your projected outcome and ask questions before a single tray is made.
Step 4: Custom Aligner Fabrication
Your treatment plan is sent to the Invisalign laboratory, where your complete set of custom aligners is manufactured to the exact specifications of your ClinCheck plan. Each aligner in the series is slightly different from the last, representing one incremental step in the total movement of your teeth.
Step 5: Attachments, If Required
Some treatment plans require small, tooth-coloured composite bumps called attachments, which are bonded directly to specific teeth. Attachments provide the aligner with additional grip and leverage to achieve rotations, extrusions, and movements that a plain aligner tray cannot accomplish on its own. They are tooth-colored, barely visible, and removed cleanly at the end of treatment.
Step 6: Wearing Your Aligners
Each aligner set is worn for one to two weeks before progressing to the next. For Invisalign to work effectively, aligners must be worn 20 to 22 hours per day. Skipping wear time does not pause your treatment. It delays it and reduces the predictability of results. Aligners are removed only to eat, drink anything other than plain water, and brush and floss.
Failing to meet the 20 to 22-hour daily wear requirement is the single most common reason Invisalign results fall short of expectations. Compliance directly determines outcome.
Step 7: Progress Check-Ups
Throughout treatment, you return to Arlington Dental Excellence for periodic check-ups, typically every six to eight weeks. Dr Ghanim monitors tooth movement against the ClinCheck plan, assesses aligner fit, and makes any necessary adjustments if teeth are not tracking as projected.
Step 8: Retainers
Once you complete your final aligner tray, your teeth have reached their new positions but have not yet fully stabilised. Retainers are non-negotiable at this stage. Without them, teeth naturally return toward their original positions, a process called relapse. Retainers are worn full-time initially, then nightly long-term, to maintain your results permanently. If you are still in the research phase, our guide on how to get Invisalign walks you through everything to prepare before your first appointment.
How Long Does Invisalign Take?
Treatment time depends on case complexity and daily compliance. Simple corrections take as little as 6 months, moderate cases 12 to 18 months, and complex bite corrections beyond 18 months. Studies show Invisalign finishes an average of 5 months faster than braces when patients meet the 22-hour wear requirement.
Several factors influence your individual timeline:
- Severity of misalignment: Minor crowding resolves faster than significant overbites or crossbites
- Number of aligner trays: More complex cases require more trays and longer treatment sequences
- Compliance: Wearing aligners fewer than 20 to 22 hours per day is the most controllable factor affecting treatment length
- Age: Bone density increases with age, which can slow tooth movement slightly in older patients
- Refinements: Some patients require additional aligner sets, called refinements, to complete tooth movement after the initial series is finished
Most patients notice visible changes within the first two to three months. Unsure whether Invisalign is the right treatment length for your case? Our guide to the best teeth straightening method breaks down every option by complexity and timeline. During your consultation, Dr Ghanim will review your ClinCheck plan and provide a personalised timeline before treatment begins.
How Does Invisalign Compare to Traditional Braces?
Both options straighten teeth effectively, but the right choice depends on the complexity of your case, your lifestyle, and your treatment goals.
| Factor | Invisalign | Traditional Braces |
| Visibility | Nearly invisible | Clearly visible |
| Removability | Fully removable | Fixed |
| Diet restrictions | None | Significant |
| Oral hygiene | Normal brushing and flossing | Requires special tools |
| Treatment time | 6 to 18 months average | 18 to 36 months average |
| Starting cost at our practice | From $2,600 | From $2,000 |
Invisalign suits patients who prioritise discretion and flexibility. Traditional braces are more effective for complex tooth movements or for patients in whom compliance with a removable device is a concern. Patients with minor cosmetic misalignment who want instant results may also consider dental veneers. Dr Ghanim will review your bite and treatment goals at your consultation and recommend the option that delivers the most predictable outcome. You can explore all available teeth straightening options at Arlington Dental Excellence before making a decision.
Not sure if Invisalign is right for you? Read our full guide to Invisalign alternatives before making a decision. Patients seeking to straighten their teeth without braces can explore the full range of non-bracket options available at Arlington Dental Excellence.
Book Your Invisalign Consultation in Arlington, VA
At Arlington Dental Excellence, Dr. Layth Ghanim brings 38 years of cosmetic and orthodontic expertise to every Invisalign case, from your first scan to your final retainer.
Call (703) 420-3253 to book your consultation, or visit us at 3801 Fairfax Dr, Suite 54, Arlington, VA 22203.
We are open Monday through Saturday, with evening hours on Tuesdays until 7:00 PM, and emergency appointments are available on Sundays. Invisalign starts at $2,600. We accept most major insurance providers and offer flexible financing through CareCredit, LendingClub, and Sunbit.
FAQs
Is Invisalign painful?
Most patients experience mild pressure for one to two days after switching to a new aligner set. Discomfort is significantly less than with traditional braces and settles quickly as your teeth adjust.
Can I eat and drink with Invisalign in?
Aligners are removed for all eating and drinking except plain water. This eliminates food restrictions entirely and makes brushing and flossing straightforward throughout your treatment.
What happens if I lose an aligner?
Contact Arlington Dental Excellence immediately at (703) 420-3253. Dr. Ghanim will advise whether to move to your next tray or arrange a replacement based on your treatment stage.
Does Invisalign work for adults over 40?
Yes. Research shows patients aged 35 to 50 experience efficient tooth movement with Invisalign. There is no upper age limit, provided your gums and bone health are in good condition.