New to Our Office!!
New to Our Office!!
New to Our Office!!


Welcome to Long Island Dental Group!

At Long Island Dental Group, our priority is to deliver quality care to informed patients in a comfortable and convenient setting.

Improve Your Dental Health
When you have dental problems, you need to turn to a dentist who listens and responds ... an experienced doctor who knows the field and can effectively diagnose and treat your needs ... a friendly dentist who counsels you on the best ways to maintain and improve your dental health. Our staff meet all these criteria. Plus, you benefit from a dedicated team of trained professionals who give you the individualized attention you deserve.

Informed Patients
Long Island Dental Group believes that informed patients are better prepared to make decisions regarding their health and well being. That is why we've included an extensive section on this web site covering the full array of topics associated with dentistry and dental diagnoses and treatments. 

We encourage you to look through these pages whenever you have an interest or concern about your dental needs and care. That's why we've included an extensive section on this web site covering the full array of topics associated with dentistry and dental diagnoses and treatments.

Comfortable, Convenient Setting

The best care in the world doesn't mean anything if you can't access it. At Long Island Dental Group, we strive to make our Greenvale office as efficient and convenient as possible. Included in these web pages is information about Long Island Dental Group's office, including our Greenvale location, maps, directions, hours, insurance policies and appointment scheduling. You can even email a request for an appointment right here!


We hope you find this web site useful and invite you to contact us with your questions at any time.



  • Composite Bonding

  • Cosmetic Contouring

  • Crowns and Bridges

  • Cosmetic Fillings

  • Bone Grafts & Soft Tissue Grafts

  • Treatment for Excessive or Uneven Gums

  • Dental Implants

  • Cosmetic Dentistry

  • Invisalign

  • Veneers (Emax, Zirconia, or Feldspathic)

  • Zoom Whitening

  • Sealants

  • Root Canal Therapy

  • Extractions

  • Scaling and Root Planing

  • Flap Surgery

  • Orthodontics

  • Dentaofacial Orthopedics

Oral Examination,
Diagnosis, & Treatment Planning

The initial visit of the patient, depending on the patient's chief complaints, includes an oral examination , cancer screening, and various X-rays (periapical, bitewings, panoramic, or CT scan)

Endodontic (Root Canal Treatment)


We provide root canal treatment on anteriors and premolars

& molars.Conventional , Wave One, Warm GP sealing




We will work to place implant/s for a missing tooth or teeth, or stabilize a removable denture. Our doctors have years of expertise in dentistry, surgical & prosthetics implant.


• Screw-retained or cement-retained implants

• All-on-4® Computer guided surgery

• Fixed or removable prosthesis

• Bone graft procedure for insufficient bone (includes sinus lift and block graft, ridge splitting, guided bone regeneration)

Fillings: Composite

Composite fillings are tooth-colored filings that are light cured to match your teeth.

Emax inlay or onlay, Zirconia inlay or onlay

Dental Prophylaxis & Periodontal Treatment


You should have a standard cleaning at least twice a year. A preventive treatment includes an Adult Prophy (basic cleaning). For advanced periodontal problems, periodontal scaling and root planing or surgical periodontal treatment (which includes guided tissue regeneration) can be done.

Crowns & Veneers


You can have a new smile with all-porcelain crowns (empressed material) on the anterior and posterior teeth

• Crowns, veneers, and full mouth rehabilitation for severely damaged teeth

• The best updated material will be used for each individual

Mouth Guards


We fabricate Night Guards to prevent dental and TMJ trauma caused by nocturnal teeth grinding or clenching. We also fabricate appliances for sleep apnea patients.

Teeth Whitening


Our state-of-the-art, in-office Zoom Bleaching system will make your teeth whiter in less than 1.5 hours. Another option is our home bleaching system you take with you for results in 2 weeks. You can also consider a combination program of both systems for optimal, long-term results.

Orthodontics and Dentofacial Orthopedics


Dr. Lewkowtz is proud to offer the latest in Orthodontic treatment including the finest braces, clear made of pure sapphire crystals and very smooth and aesthetic and small and smooth metal braces and invisalign.  The American Association of Orthodontists recommend that your child should have their first orthodontic evaluation at 7 years old. This is the age when the first molars have erupted and the orthodontist can catch a problem before it gets worst , if there is a problem such as crowding and and/or a cross bite.  This may avoid extensive orthodontic treatment later in life as well as helping to avoid extractions of any permanent teeth due to overcrowding.   If this intervention is needed, special orthodontic appliances like a palate expander or habit breaker and  functional appliances can encourage proper jaw growth and try to make room for all of their permanent teeth. She will help straighten your teeth, enhance the appearance of your smile and improve your overall dental health and self esteem.

Dr. Lewkowitz will offer you or your child, a comprehensive list of orthodontic treatment options that can meet you or chid's particular needs.  She will take the time to discuss the best orthodontic treatment plan to help improve your appearance, alignment of your teeth and your self confidence. . 

As for the adults, it is never too late to correct orthodontic issues, such as crowding, excessive spaces, misalignment and other bite issues.  Dr. Shin and Dr. Lewkowitz will work together when more space is needed for an implant for example. More and more adults are seeking orthodontic treatment today, due to the beautiful aesthetic appliances that are now available.


Call our office today, and make an appointment. An Orthodontic consultation is aways free of charge.  Change your smile, your life and your self esteem!



Kiwon Kenneth Shin D.D.S.
Karen Lewkowitz D.D.S.
Lewkowitz Orthodontics
Witold R. Wegorzewski D.D.S.
Dental Tools in Pocket
Peter Jin D.D.S.
Dr. Bruce D.D.S.
Patricia Seo-Huynh D.D.S.
Perfect Smile
John Hyong Chol Kwon
Jennifer Sohn



Long Island Dental Group

29 Northern Blvd 2nd Fl

Greenvale NY, 11548

Tel. 516-625-2929

Open Hours

Monday -  10AM - 7PM

Tuesday -  9AM - 6PM

    Friday -  9AM - 6PM

Saturday - 9AM - 5PM

Sunday - By appointment

(Orthodontics only)


Kiwon Shin Dentist P.C.

163-10 Northern Blvd. #306

Flushing, NY 11358

Tel. 718-358-5656

Open Hours

Monday:    9AM - 6PM

Tuesday:    9AM - 6PM

Wed. & Thurs.:  Closed

Friday:        9AM - 6PM

Saturday:   9AM - 4PM

Sunday:     Closed

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