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Whitening, Elevated

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By: Dental Product Shopper
4/2/2026

KöR whitening gels reduce sensitivity and provide beautiful results—even for tetracycline staining cases once thought untreatable

 

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THERON MANSON, DDS, MAGD

Dr. Manson received his DDS from the University of Washington School of Dentistry. A Pierre Fauchard Academy Fellow, he is president of the Washington Academy of General Dentistry, promoting high standards of general dentistry throughout the state.

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DAVID CHI, DDS, FAGD

After graduating with a bachelor’s degree from Northwestern University, Dr. Chi worked in management consulting before returning to Seattle to attend the University of Washington School of Dentistry. He earned his fellowship in the Academy of General Dentistry in 2024.

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Before discovering KöR, Dr. Theron Manson had to tell patients with tetracycline staining that whitening just wouldn't work. Now, Dr. Manson and his partner, Dr. David Chi, know they can achieve beautiful results—and it all started with their first case. That patient, who had tetracycline staining, saw results before treatment was finished.

 

“It worked amazingly well,” Dr. Manson said, “and she was thrilled.”

 

The KöR Difference

 

Patients with tetracycline staining benefit from KöR Ultra-T, but there are various KöR kits for different needs: KöR Home provides unexpectedly effective at-home whitening; KöR MAX combines at-home with in-office for patients who want the maximum "WOW" possible; and KöR Ultra and Ultra-T kits are the go-to for more difficult cases. When Drs. Manson and Chi first started using KöR about 3 years ago after learning about it through the Kois Center, their rep walked them through when to choose which kit. Even now, if they’re unsure of which direction to go, all they have to do is reach out. 

 

“Their customer service is fantastic,” Dr. Manson said. “You feel like you have someone in the company who's on your side.” 

Every team member received KöR-Seal Whitening Trays, allowing them to experience the system for themselves. Dr. Manson said they love sharing their before-and-afters, and they're more confident talking with patients about whitening. And patients have been thrilled with their results, “especially patients who have tried a lot of whitening systems that didn’t work.” That success, Dr. Chi said, has led to referrals.

 

“If we want to improve somebody’s quality of life, KöR can be pretty transformational,” he said. “Our team takes a lot of pride in that.” 

 

An Easy Choice

 

KöR whitening gels are refrigerated from manufacture through delivery—a unique process. This protects the gels from heat damage while assuring maximum potency.

 

The science “makes sense” to patients, who are more motivated to whiten because they’re not wor­ried about sensitivity, Dr. Manson said.

 

KöR-Seal Whitening Trays, with their precision fit, also help. The seal they create not only increases comfort, but ensures no bleach seeps out, reducing sensitivity and enhancing effectiveness.

 

KöR is an “easy choice,” Dr. Manson said, with “better customer service, better whitening, and less sensitivity" than other options.

 

“We feel like it builds our practice,” Dr. Manson said. “It allows us to help people using something that's affordable. It far exceeded expectations.”