Meet the doctors.

Dr. Karin Grinbaum leads orthodontics for teens and adults. Dr. Liel Grinbaum leads pediatric dentistry for infants through teens. Your whole family’s care lives under one roof, coordinated between doctors who talk to each other every day.

Meet Dr. Karin Meet Dr. Liel

The Smiles + Grins team with Dr. Karin Grinbaum and Dr. Liel Grinbaum in the waiting room on Manhattan's Upper East Side.

Dr. Karin Grinbaum, DDS

Dr. Karin creates personalized orthodontic treatment for teens and adults, blending artistry and science across hidden braces, Invisalign®, clear aligners, and traditional braces.

5,000+ smiles created over 10+ years in NYC
NYU College of Dentistry — Orthodontics & Dentofacial Orthopedics residency
Omicron Kappa Upsilon national dental honor society

Meet Dr. Karin →

Dr. Liel Grinbaum, DMD

Dr. Liel is a board-certified pediatric dentist with specialty training in sedation dentistry and care for children with special needs. He has treated thousands of little smiles in NYC.

Richard C. Pugh Achievement Award, American Board of Pediatric Dentistry
Scored in the top 3% of all ABPD qualifying exam candidates
Pediatric Dentistry Residency — Maimonides Medical Center

Meet Dr. Liel →

One practice, two specialists

Why two specialists under one roof.

Care that grows with your family

A child who starts with Dr. Liel at their first visit can move into orthodontic care with Dr. Karin when the time is right — without changing offices, transferring records, or starting over with a new team.

Coordinated between doctors

Because both doctors practice in the same office, growth, bite development, and treatment timing get discussed directly rather than passed between practices.

Board-certified expertise

Both doctors completed specialty residency training in their fields, and both bring that training to a boutique office designed around comfort rather than volume.