Meet The Dentists

Dr. Helaine Smith, DMD Of Pound Ridge Cosmetic Dentistry

Dr. Helaine Smith is dedicated to her patients – to their care, overall health and education – since beginning her dentistry career in 1991 and is passionately committed to using the most effective state-of-the-art proven techniques and materials to guarantee the best long term outcomes for her patients.

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Dr. Smith is Deeply Committed to Education

In addition to educating her patients about their oral and their overall health, she is tireless in her pursuit of innovations to improve the quality and outcomes of patient care, taking full advantage of educational opportunities for both herself and her staff.

Helaine earned her Mastership with the Academy of General Dentistry. She is a Las Vegas Institute of Advanced Dental Studies graduate, a graduate of the Boston University School of Dentistry, has lectured widely, and has completed an executive MBA program.

Helaine is actively involved in her community and has volunteered regularly throughout her career.

“I invite you to call. We are committed to providing the best experience available in cosmetic and restorative dentistry. Please let us know how we can help.”


Top 25 Women In Dentistry

Dr. Smith was named one of the Top 25 Women in Dentistry, featured in the Dental Products Report in 2010. In 2006, Dr. Smith’s practice was first runner-up in the prestigious Cosmetic Practice of the Year Award competition, sponsored by Levin Group, Ascend Media, and Philips Oral Healthcare.

Humanitarian Work

Helaine’s humanitarian work includes missions for Operation Smile, Cape Cares, Friends of Ghana and other organizations to many locations around the globe, including Ghana, the Philippines, Honduras, Kenya and Brazil.

Environmental Activist And Angler

As you can see, Helaine loves fly-fishing and is an active member of Trout Unlimited, the Croton Watershed Chapter. Her involvement in this wonderful organization not only gives her the opportunity to enjoy one of her favorite pastimes, but provides a venue for her passion for environmental activism, water preservation and community service such as “Trout in the Classroom”, an environmental program that teaches young people about trout and the environment in which they live through the process of raising trout from eggs.

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Josephine Korlei Mensah, DMD

Dr. Mensah received both her bachelors of arts and dental degree from the University of Pennsylvania in Philadelphia. Following dental school, she completed a general practice residency at St. Luke’s-Roosevelt Hospital in Manhattan. Dr. Mensah obtained her specialty training in pediatric dentistry from St. Barnabas Hospital in Bronx, New York where she served as chief resident.

Education is one of her passions, and Dr. Mensah is currently on faculty at St. Barnabas Hospital Health System in the Bronx, where she enjoys educating and inspiring future pediatric dentists. She is a Diplomate of the American Board of Pediatric Dentistry, and a member of the American Academy of Pediatric Dentistry.

Dr. Mensah spent her childhood in the Hudson Valley and she has been working in private practice in New York for over a decade. What she loves most about pediatric dentistry is getting children and parents to understand why their dental health and consequently, overall health is so important, and getting her patients excited about coming back to the dentist! In a calm and comforting manner, she strives to make each child’s visit to the dentist a fun and pleasant one.

When she’s not fighting cavities, she enjoys traveling, tennis, learning Spanish, and most of all being a full time mother of two young, energetic children.

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Dr. Georgio H. Woo, DMD MS MS


Georgio H. Woo DMD MS MS is an expert in the field of periodontics, with a passion for treating patients and promoting dental health. He has a wealth of experience and credentials, including specialization in periodontics from Columbia University with M.S. in periodontics, a D.M.D. degree from Case Western Reserve University Dental School, a master's degree in science from John Hopkins University, and a bachelor's degree from Cornell University. As a result, he is highly skilled in treating a wide range of periodontal conditions, from simple cases to complex ones. Dr. Woo takes a patient-centered approach and strives to provide the highest quality of care to every patient he treats. If you're looking for a periodontist who has the knowledge, experience, and compassion to help you achieve optimal dental health, contact Dr. Georgio H. Woo today.

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Dr. Matthew Rhee, DMD

Dr. Matthew Rhee graduated from Rutgers University with a Bachelors degree in biology and Masters in biomedical sciences. He attended dental school in Southern California at Loma Linda University. After dental school, he returned to the east coast and completed a general practice residency at the Brooklyn Veteran’s Administration hospital, where he learned to handle complex dental issues while achieving cosmetic results.

During his spare time, Dr. Rhee enjoys snowboarding, watching movies and tv shows, and going on hikes with his wife and cat.

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Dr. Allyson Hsiao, DDS

IMG 3203 After graduating from the University of the Pacific Arthur A. Dugoni School of Dentistry, Dr. Hsiao completed her GPR program training at Rancho Los Amigos National Rehabilitation Center. While there, Dr. Hsiao focused on working with medically complex patients with disabilities to enhance their dental experience and oral health literacy, and provided them with comprehensive treatment. Dr. Hsiao saw patients in the operating room for a variety of appointments ranging from standard screenings to more complex procedures. Dr. Hsiao gained valuable experience in performing restorative and endodontic procedures, fabricating removable prostheses, and completing routine and surgical extractions in a wide patient population with special needs.

 In her practice, she is committed to lifelong learning and improvement both in herself and in her patients. She believes the best dentists not only treat their patients, but also promote education and prevention to ensure their patients’ health and well-being. Along with expressing her care for patients through a proactive, education driven approach, she also ensures that she remains gentle, detail-oriented, and personable with everyone she treats. With her combination of technical and interpersonal skills, we at Pound Ridge Cosmetic Dentistry are proud to have her as part of the team.


Patient Testimonials:

"Just had my first experience with Dr. Smith and her wonderful practice. From the first phone interactions and easy scheduling, to the actual offices (super clean and sterile) to the comprehensive analysis and teeth cleaning: a terrific practice and a superb doctor. Highly recommend!"

- L.S.

"Amazing experience from the time you walk in to when you leave. Clean, professional, and honest. Have been to multiple dentists around Putnam/Westchester county…hands down the best. Will be going there for years to come!"

- J.B.

"Dr. Smith is wonderful! The whole experience was very informative, professional and comfortable. The work done on my teeth excellent. Do recommend!!!"

- J.M.

Schedule Your Consultation Today!

Interested in learning more about Pound Ridge Dentists Dr. Helaine Smith, Dr. Shili Feng, Dr. Jessica Saliba, Dr. Matthew Rhee & Dr. Georgio Woo? Call 914-468-4759 or book online to schedule your consultation today!


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