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Richard U. Ly, DDS

656 Main St

Port Jefferson, NY 11777


About Our Office

At our cosmetic dental office located in Port Jefferson, NY, we welcome all dental patients in need of cosmetic dental surgery. Our experienced staff of highly trained cosmetic dentistry surgeons will perform the latest in cosmetic dentistry technology. Our focus and commitment is to provide cutting edge technology for your specific cosmetic dental surgery patient's needs. Gentle Dental utilizes the latest technology in the cosmetic dentistry field, offering many advantages over traditional cosmetic dentistry. We specialize in providing you an efficient and more effective alternative to traditional cosmetic dentistry. We believe in giving full attention to our cosmetic dentistry patients and working with them to reach the best possible dental surgery results.
  • English
  • Romanian
  • Russian
  • Spanish
  • Ukrainian

Office Hours

9:00 AM
6:00 PM
8:00 AM
5:00 PM
9:00 AM
7:00 PM
9:00 AM
6:00 PM
9:00 AM
5:00 PM
9:00 AM
2:00 PM

Payment Options

  • a 10% senior discount
  • a 5% discount with full payment
Credit Lines
  • Carecredit
  • Healthcare Credit Line
  • Unicorn
American Express Discover MasterCard Visa


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Roger A. Kleinman, DDS
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Richard U. Ly, DDS
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Mark W. Knakal, DDS

Services We Offer

  • Anesthesia-Sedation
    • nitrous oxide (laughing gas)
    • local anesthesia
  • Cosmetic Dentistry
    • Opalescence® teeth whitening
    • Nite White® teeth whitening
    • Day White® teeth whitening
    • Zoom!® (1 hour in-office teeth whitening process)
    • GoSmile®
    • Trèswhite® teeth whitening
    • da Vinci VeneersTM
    • Teeth Whitening
    • dental bonding
    • porcelain dental veneers
  • Endodontics
    • root canal therapy
    • single visit root canals
    • molar endodontics
  • Oral Surgery
    • simple tooth extractions
    • dental implants (surgical placement)
    • non-impacted wisdom teeth
  • Orthodontics
    • Invisalign®
  • Other Clinical Services
    • NTI appliance
    • treatment of halitosis
    • Silent Nite®
    • Breath Rx®
    • bruxism (teeth grinding)
    • CPR
    • fresh breath
    • lab on-site
    • athletic mouthguards
    • night guards
    • pain management
    • dental sealants
    • sleep disorder
    • smoking cessation
    • snore guards
    • TMD
  • Periodontics
    • gum surgery
    • lasers
    • non-surgical gum treatment
    • root planing
    • scaling
  • Restorative Dentistry
    • composite (tooth-colored) dental fillings
    • dental inlays
    • dental onlays
    • dental crowns
    • dental bridges
    • dental implants (restoration)
    • partial dentures
    • dentures (upper and lower)
    • denture repair
    • Nobel Teeth in an HourTM
    • laser cavity detection
  • Special Needs Met
    • wheelchair access requirements
  • Specialist
    • Periodontic Specialist
  • Technology
    • DIAGNOdent®
    • Interactive patient education system
    • ultrasonic dental cleaning
    • digital xray (CDR)
    • imaging ('after' photos)
    • intraoral camera
    • Panorex FMX
    • prophy jet (air polishing)
    • state-of-the-art equipment

Complimentary Amenities

  • children's play area
  • stereo system
  • televisions
  • wheelchair access requirements



Patient Reviews

  • anonymous
    Office cleanliness
    Staff friendliness
    Short wait time
    Chairside manner
    Explained treatment
    I had ignored my teeth for a few years due to anxiety. I had a cracked tooth and went to see a dentist they had recommended for a root canal, we then proceeded to build a treatment plan. My first visit in I had four cavities filled and all the while his assistants are saying why don't we do root canals, why are we filling these teeth. I have a panic attack in the chair, I have two woman chirping around me I am basically making the wrong decision. They calm me down, we make it though and call it a day. My second visit I am told, oh your last visit used all your benefits so I paid full price for my two fillings, happy as a clam my teeth look beautiful and call it a day. I then receive a 840$ bill for my first visit and I come to find out none of my work was covered, no phone call no real explanation, just a bill. I am sick to my stomach upset. I spoke with a woman Arlene, who was professional and kind, the woman who does the billing, Heather, then called me back, long story short she says to me oh no we did talk about your crown, and that's why you "freaked out" in the chair. I had a legitimate panic attack in the chair because I have two people around me telling me I shouldn't have my teeth being filled. It's discussing and unprofessional, I did not choose to have anxiety of dentists , it's not by choice I felt scared. If you are going to insult someone because of an anxiety attack they cannot control you do not deserve my business.