A dentist at Sweet Smiles Orthodontics in Arlington, MA checks a smiling braces patient reclined in a chair with a bib.

Top-Rated Orthodontist in Arlington

Trusted orthodontist in Arlington offering braces and Invisalign for kids, teens, and adults. Enjoy same-day starts and 0% APR financing. Looking for an orthodontist near me? Book your free consultation below.
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★★★★★
5 stars, 107 reviews

Sweet Smiles Orthodontics – Associations & Credentials

Sweet Smiles Orthodontics, led by Dr. Yajun Cui, has a strong history of delivering expert orthodontic care to the community.
Member: AAO, ADA • Invisalign Provider.
AAO logo in a blue box with the organization's name in blue, featured by Sweet Smiles Orthodontics in Arlington, MA.
Bold, dark blue "ADA®" letters on light gray, symbolizing Sweet Smiles Orthodontics' quality in Arlington, MA.
Invisalign logo featuring a blue starburst and lowercase blue text, displayed at Sweet Smiles Orthodontics in Arlington, MA.
Blue circular logo for Sweet Smiles Orthodontics in Arlington, MA, showing two snakes forming a tooth with a barbell shape on white.

Among the Best Orthodontists in Arlington

We are a doctor-owned orthodontic practice led by Dr. Yajun Cui, a top-rated orthodontist dedicated to creating healthy, confident smiles. At Sweet Smiles Orthodontics, our team combines advanced orthodontic technology with personalized, patient-focused care trusted by families throughout Arlington. We offer comprehensive orthodontic solutions for children, teens, and adults, designed for comfort, convenience, and long-lasting results. We are proud to be locally owned, not a corporate chain, and remain committed to providing exceptional orthodontic care right here in our community.

Meet Dr. Yajun Cui, DMD, PhD
Your Top-Rated Family Orthodontist-Scientist

  • Harvard-trained orthodontist with Top-5 D.M.D. and a research-driven Ph.D. background.
  • Published researcher with studies in Nature Medicine, Arthritis Rheum, and other respected journals.
  • Owner of Sweet Smiles Orthodontics, providing advanced, patient-focused orthodontic care in Arlington.
  • Recipient of ICD Leadership Award, OKU Honor Society, and Young Investigator Award.
  • Experienced in braces, TADs, expanders, functional appliances, and leading aligner systems.
Dr. Yajun Cui, DMD, PhD, orthodontist expert at Sweet Smiles Orthodontics in Arlington MA, smiling in blue scrubs with Harvard Orthodontics logo, standing confidently with arms crossed inside a modern dental clinic.

Starting Orthodontics is Easy

Schedule

Book your first visit online or by phone, it’s completely free.

Choose Your Plan

Explore treatment and financing options designed to fit your needs.

Same-Day Braces

Ready to begin? Treatment can often start the same day as your consultation.
Terms and Conditions
Same-day braces installation depends on schedule availability

Core Orthodontic Services – Orthodontic Treatment in Arlington, MA

Smiling young woman with dark hair in a white top points at braces, confident in her Sweet Smiles Orthodontics results in Arlington, MA.

Braces

Metal braces and self-ligating clear (ceramic) braces to suit different treatment needs.

Airway Orthodontics

Treatment focused on guiding vertical growth using vertical pull chin cups, expanders, MARPE, or SARPE to correct skeletal concerns and support better breathing.

A man checks if he's a mouth breather by breathing into his hand, with Sweet Smiles Orthodontics in Arlington, MA branding shown.
Blue circular logo for Sweet Smiles Orthodontics in Arlington, MA, showing two snakes forming a tooth with a barbell shape on white.
A woman with glasses smiles and holds a clear aligner at Sweet Smiles Orthodontics in Arlington, MA.
Blue circular logo for Sweet Smiles Orthodontics in Arlington, MA, showing two snakes forming a tooth with a barbell shape on white.

Invisalign® Clear Aligners

Clear aligner options for all ages, including Invisalign, providing a discreet and comfortable alternative to braces.

Braces Removal

Professional removal of braces, followed by tooth polishing and custom retainer preparation.

A close-up of braces removal with dental pliers at Sweet Smiles Orthodontics in Arlington, MA, showing a gloved hand at work.
Blue circular logo for Sweet Smiles Orthodontics in Arlington, MA, showing two snakes forming a tooth with a barbell shape on white.
Smiling man with ceramic braces and a beard gives a thumbs-up indoors at Sweet Smiles Orthodontics in Arlington, MA.
Blue circular logo for Sweet Smiles Orthodontics in Arlington, MA, showing two snakes forming a tooth with a barbell shape on white.

Orthodontics for Adults

Orthodontic care for adults of all ages, with discreet braces and clear aligner options designed for busy professionals.

Orthodontics for Children

Orthodontic treatment for kids and teens starting from age 6, offering early intervention and teen-friendly treatment options.

Joyful child with a bright, wide smile wearing a fur-trimmed winter hood outdoors, representing the happy, confident smiles achieved through affordable orthodontic treatment at Sweet Smiles Orthodontics in Arlington, MA
Blue circular logo for Sweet Smiles Orthodontics in Arlington, MA, showing two snakes forming a tooth with a barbell shape on white.

Bite Problems & Airway Habits

Overbite

A common dental condition that can be successfully corrected.

Underbite

Often needs early treatment to prevent surgical procedures.

Mouth Breathing

Our care improves nasal breathing and supports healthy growth.

Tongue Thrust

Can affect teeth and speech; early care helps avoid issues.

Jaw Surgery

Enhances function, appearance, airflow, and facial symmetry.

Crossbite

A reversed bite involving front or back teeth.

Crowding

Teeth overlap due to limited space, affecting alignment and cleaning.

Spacing

Gaps between teeth that may impact dental function and appearance.

Open Bite

Upper and lower teeth fail to meet, affecting chewing and speech.
Pattern of light gray tooth outlines on white, highlighting Sweet Smiles Orthodontics in Arlington, MA and their cheerful dental care.
Woman pointing at an orthodontic poster at Sweet Smiles Orthodontics in Arlington MA, promoting PPO insurance plans

Cost & Insurance for Braces & Invisalign in Arlington

At Sweet Smiles Orthodontics – Arlington Braces & Invisalign, we make orthodontic care simple and affordable.

  • Flexible payment options are available for braces and Invisalign.
  • We work with PPO dental insurance plans that include orthodontic benefits for out-of-network providers and assist patients in understanding their coverage.
  • Transfer patients are welcome, and we’re happy to continue your care.
Side-view 3D dental X-ray highlighting bone and teeth alignment at Sweet Smiles Orthodontics in Arlington, MA.

Advanced Technology for Precise, Comfortable Orthodontic Care

  • Digital Scanning & 3D Treatment Planning: Uses precise digital scans of your teeth to plan treatment without traditional impressions.
  • Braces Options: Traditional metal braces and clear ceramic braces for effective, reliable teeth alignment.
  • Aligner Option: Invisalign® clear aligners offer a discreet, comfortable alternative to braces.
  • Emergency Care: Immediate support for urgent orthodontic concerns.

What Our Patients Say

Sweet Smiles Orthodontics is Often Mentioned as Best Orthodontist in Arlington.
At Sweet Smiles Orthodontics in Arlington, MA, Dr. Yajun Cui in scrubs and another man in a jacket and cap smile at the desk.
  • ★★★★★
    I am happy I chose this place. The office is clean, welcoming, and well-organized. Dr. Cui and the entire team are professional, knowledgeable, and very caring. They are always gentle and patient, easy to communicate, which makes the whole process stress-free and reassuring. I feel confident that my kid is in great hands and look forward to seeing the final results. I highly recommend this office to anyone considering orthodontic care! N TIAN October 1, 2025
  • ★★★★★
    Thanks to Dr. Cui, my daughter’s teeth are now beautifully aligned. Throughout the treatment, he was very professional and patient, always explaining each step clearly and making my daughter feel at ease. The results are excellent—her teeth are straight, and she smiles with so much confidence now. Naomi Ma September 14, 2025
  • ★★★★★
    I got my invisible aligners done at Sweet Smiles and had such a great experience! Everyone here is super friendly and patient. Xuelei at the front desk always greeted me with a warm smile and checked me in right away. Dr. Cui is amazing—professional, caring, and really goes above and beyond. Even when my teeth movement changed, he made sure I got the right aligners, gave me a discount, and worked out a flexible payment plan when my insurance stopped covering. Highly recommend Sweet Smiles—definitely the best orthodontist in the Boston area! Nipun Kaplish September 13, 2025
  • ★★★★★
    Dr. Cui is professional! Super friendly and easy to deal with. My son had a more complicated treatment path which went so well. Jennifer Geng
  • ★★★★★
    My daughter just finished her ortho treatment with Dr. Cui. Dr. Cui is the BEST! Very professional and patient. We have loved our experience here! We appreciated the specialized care and friendly staff. Thank you! Jeong Eun Park
  • ★★★★★
    I just finished my braces process with Dr. Cui and I couldn’t be happier! He was very professional, caring, patient, and made every visit enjoyable. Evelyn Yuliana Rubio Mejía
  • ★★★★★
    Dr Cui. Is very professional, gracious, very responsive, kind, and respectful. My new smile looks wonderful! What a blessing and a gift! Thank you for your help and orthodontic expertise! The staff are also friendly, knowledgeable and helpful. I have already recommended him to friends! God bless you all. Roz
  • ★★★★★
    My daughter had a wonderful experience with her braces and loves the results she obtained. Dr. Cui is kind, attentive and great to work with. His staff is also friendly and professional. Highly recommended !! M. Davenport

Smile Gallery: Invisalign & Braces 
Before‑and‑After in Arlington

Discover real transformations with braces and Invisalign. Results can vary by patient. Book a free consultation to explore what your smile could look like.
Before Invisalign at Sweet Smiles Orthodontics in Arlington, MA: close-up of slightly misaligned teeth and healthy pink gums. A close-up of clean, aligned teeth and healthy gums after Invisalign at Sweet Smiles Orthodontics in Arlington, MA.
Before
After

Invisalign/Clear Aligners

Showing mild crowding and gum redness before braces, patient at Sweet Smiles Orthodontics in Arlington, MA opens mouth. Teeth and gums after braces at Sweet Smiles Orthodontics in Arlington, MA; mild gum redness and a white spot visible.
Before
After

Braces

Your Orthodontic Office in Arlington

Located in the heart of Arlington, our office is at 1408 Massachusetts Ave, Arlington, MA. Conveniently near popular landmarks such as the Minuteman Bikeway, Arlington Center, and Spy Pond. Easily accessible by car and local bus routes, our central location makes visiting simple for patients throughout the area.

Minutes away from: Cambridge, Belmont, Medford, and Lexington. Only 15 minutes from downtown Boston. Our prime location allows patients from across the Greater Boston area to reach us with ease.

Our practice proudly serves top neighborhoods in Arlington and surrounding communities, welcoming patients from Arlington Center, East Arlington, West Arlington, and nearby towns including Cambridge, Lexington, and Medford.