Ready to Whiten Your Teeth Without Damaging Them?
Teeth whitening removes stains and brightens your smile in a single appointment. A whitening agent breaks apart discolored molecules to lift stains and brighten tooth color.
Medically reviewed by Dr. Boris Zusin, DDS, FAGD, MBA, MS, Diplomate, American Board of Dental Sleep Medicine (ABDSM) · Last reviewed July 31, 2026
Why Teeth Become Stained Over Time
Tooth enamel is porous and absorbs colored pigments from foods and beverages, as well as from smoking and certain medications. Whitening is one of the most common cosmetic dental treatments — easy, effective, and affordable.
Am I a Candidate?
Most patients with stained but decay-free teeth are good candidates. We'll evaluate the cause of your staining to make sure whitening will give you the results you want.
In-Office vs. At-Home: Which Is Actually Better?
The honest answer is that they're both legitimate, well-studied options — the right one depends on how fast you want results and how much sensitivity you're willing to tolerate along the way.
| At-Home Custom Trays | In-Office | |
|---|---|---|
| How it works | Custom-fitted trays with a lower-concentration gel, worn daily or overnight for 2–4 weeks | A stronger gel applied by us in the chair, in a few 15–20 minute rounds |
| Speed | Gradual, over a few weeks | Immediately visible, same visit |
| Sensitivity | Generally the lowest of any method — considered the gold standard for this reason | More common and more noticeable, given the stronger concentration |
| Effort required | Depends on you sticking with the daily routine | None — we do the work in one or two visits |
One thing worth knowing: combining an in-office visit with at-home trays doesn't produce a whiter result than either one done well on its own — it mainly adds sensitivity without adding benefit. We'll recommend whichever single approach fits your timeline, not a combination by default.
What Whitening Can — and Can't — Fix
Responds Well
Whitening works reliably on natural tooth staining from coffee, tea, wine, tobacco, aging, and mild fluorosis — the common, everyday causes of a duller smile.
Doesn't Respond, or Responds Unpredictably
Whitening gel has no effect on crowns, veneers, or existing fillings — if those are visible when you smile, they'll stand out more once the natural teeth around them lighten, and may need to be replaced afterward to match. Staining from tetracycline (an older antibiotic) or from metal exposure also tends to respond poorly and unevenly. We'll flag either situation at your consultation rather than let you find out after treatment.
One more option worth knowing about: a single tooth that's darkened from the inside after a root canal can often be whitened from within (called internal or “walking bleach” bleaching) rather than needing a crown or veneer just to match its neighbors. Ask us about this if you have a root-canal-treated tooth that's darker than the rest of your smile.
Care From a Team That Knows You
Dr. Boris Zusin is an expert in general, cosmetic, implant, and dental sleep medicine, with 30+ years of clinical experience and ongoing continuing education. Lena Zusin, RDH works alongside him to make every visit as warm and comfortable as possible.
“Drawing upon our combined skills refined through years of experience and continued education, Lena and I will do everything possible to ensure that your entire dental experience at our office is as good as possible.” — Dr. Boris Zusin
- Uncompromising clinical excellence
- Meticulous attention to detail
- A gentle approach to dentistry
FAQ: Teeth Whitening at Zusin Dental, NYC
If your teeth have become stained from foods, beverages, smoking, or oral hygiene habits, you're likely a candidate. Stains from medication may not respond as well, and teeth need to be free of decay before whitening.
Professional whitening uses a stronger concentration of whitening agent, typically producing faster, more dramatic results than drugstore kits. It's applied in-office, though some cosmetic dentists also offer take-home trays.
Your lips and gums are shielded, a whitening agent is applied for about 30–60 minutes, then rinsed off. Afterward, teeth may be temporarily sensitive to hot and cold for a few days; avoid highly pigmented foods and drinks for the first 24 hours, since the agent continues working during that window.
Typically six months to three years, averaging about a year. Good oral hygiene and limiting pigmented foods/drinks help results last longer. Dr. Boris Zusin may provide take-home trays to help maintain your results.
Learn More From Our Blog
Real Solutions For Real Patients
A real Zusin Dental teeth whitening case, before and after treatment.
Sources
- Clinical Decision-Making in Tooth Bleaching Based on Current Evidence: A Narrative Review — Kury M, Prunes BB, Saraceni CHC, et al., Dental Materials (2025)
- At-Home vs In-Office Bleaching: An Updated Systematic Review and Meta-Analysis — de Geus JL, Martins A, Reis A, Rezende M, Operative Dentistry (2025)
- Tooth Whitening: From the Established Treatments to Novel Approaches to Prevent Side Effects — Rodríguez-Martínez J, Valiente M, Sánchez-Martín MJ, Journal of Esthetic and Restorative Dentistry (2019)
- Assessment of Color Changes and Adverse Effects of Over-the-Counter Bleaching Protocols: A Systematic Review and Network Meta-Analysis — de Oliveira MN, Vidigal MTC, Vieira W, et al., Clinical Oral Investigations (2024)
- Comparison of Efficacy of Tray-Delivered Carbamide and Hydrogen Peroxide for At-Home Bleaching: A Systematic Review and Meta-Analysis — Luque-Martinez I, Reis A, Schroeder M, et al., Clinical Oral Investigations (2016)
- Present Status and Future Directions — Managing Discoloured Teeth — Kahler B, International Endodontic Journal (2022)
- Nonvital Tooth Bleaching: A Review of the Literature and Clinical Procedures — Plotino G, Buono L, Grande NM, Pameijer CH, Somma F, Journal of Endodontics (2008)
- Home-Based Chemically-Induced Whitening (Bleaching) of Teeth in Adults — Eachempati P, Kumbargere Nagraj S, Kiran Kumar Krishanappa S, Gupta P, Yaylali IE, Cochrane Database of Systematic Reviews (2018)
- Tooth-Whitening Agents and Polymer-Based Carriers: Efficacy, Safety, and Clinical Perspectives — Lin PY, Chen LN, Tseng CF, et al., Polymers (2025)
Ready to Get Started?
You will never be treated like a statistic at Zusin Dental. Let's talk about what's right for you.
Schedule Your Visit Call 212-877-7475Your Experience Matters To Us
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“Knowledge is an understatement when you talk about Dr. Zusin! My family and I have been patients of his for over 20 years. I always feel I am given the best advice and never pressured into any unnecessary treatment.”
Faina S.
“I tried a couple different dentists in NYC and Zusin Dental is the best. They are thorough, they don't try and upsell you services you don't need, and they offer appointments on Saturday. The best cleaning I ever had!”
Gordon T.
“Routinely SUPERB level of care, including Dr. Zusin having made himself available for emergent care when needed. The office is always spotlessly clean and there is no waiting at appointment time. Pain-free dentistry!”
Anil N.
“I have never experienced pain with Dr. Zusin. For a practice in busy Manhattan, their office has a small town feel, very relaxed and personable. Lena is always quick to respond to appointment requests or changes.”
Molly P.
“Dr. Zusin is the best dentist! I have been visiting his office for the majority of my life. He has expertly performed teeth whitening and Invisalign, and continued to save my teeth after I chipped my two front teeth.”
Sasha S.
“The West End office is state of the art and very relaxing. Dr. Zusin and Lena are a great team. No matter the dental problem you will get the best results. I highly recommend them.”
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