meet our team


Kelly Johnson – Dental Hygienist

Kelly has been providing oral health care in Miami as a dental hygienist for nearly 22 years. Originally from Indiana, she has lived in Miami for more than 30 years. Along with her husband, J.J., and three children – Taylor, Lauren, and Andrew – Kelly is active with local sports clubs, participates in elementary school reading programs, and volunteers her time with Strong Kids at the YMCA.

Kelly graduated from the Miami Dade College Dental Hygiene Program in 1997. Her focus is not only the health of your teeth, gums, and bone, but she possesses a keen knowledge of the influences of both diet and habits on patients’ oral health and overall health. She has advanced education in non-surgical modalities for improving gum health, including periodontal chemotherapeutics, holistic dentistry, and the latest hygiene products.


Leda Pena – Dental Hygienist

Leda is a graduate of the Miami Dade College Dental Hygiene Program and has been caring for patients for over 29 years. She has a bio-friendly approach to gum management and brings tremendous experience in the area of holistic dentistry.

Leda has two boys, Andrew and Anthony, and enjoys spending time with family.


Gaby – Administrative assistant

Gaby made Greenstein Dental her home in 2016 after receiving numerous accolades and recommendations from other dental practices.  Born in Quito, Ecuador, Gaby moved to Miami in 1993, then received her degree in Business Administration in 2001.  With over 14 years of experience in the dental field, she has a vast skill set in customer relations as well as extensive knowledge about dental insurance to assist patients in obtaining their benefits.  Her past clinical experiences afforded Gaby certifications for Invisalign as well as OSHA and HIPPA-related requirements for public safety and privacy.

When away from the office she loves spending time with her two boys, Anthony and Sebastian, and most of all loves to travel having recently visited China in 2018.


monique – dental assistant

Monica Rosales, better known as "Monique" in our office (to avoid confusion), graduated from dental assisting school locally in 2017.  As part of her year-long curriculum, she accumulated the necessary clincal hour by perfecting her skills at Greenstein Dental both chairside and in the dental laboratory.

Originally from Barranquilla, Colombia, Monique got her degree in Pre-School Education from Santiago de Cali University, teaching for many years there before coming to Florida.  She continued with Pre-K education in Miami after receiving her CDA license from Miami-Dade College.  The combination of experience with children and her interest in dentistry allowed her to seamlessly blend in with the pediatric part of our practice particularly assisting in orthodontic care.

Married for over 23 years to her US Coast Guard husband, Rafael, she enjoys spending time with him and her son, Matthew, particularly traveling.


Monica Martinez – Office Manager

Born in Malaga, Spain and of Cuban and Colombian descent, Monica has been the office manager at Greenstein Dental for more than 17 years. Before joining Greenstein Dental, Monica received training in Expanded Dental Functions from Robert Morgan Technical Institute and spent more than eight years working chairside as a dental assistant. Her main focus is to assist in coordinating dental treatment helping answer questions and facilitate both finances and scheduling for our clients.

She graduated with a Bachelors of Science degree from Florida International University in 1998.


Dunia - dental assistant

Dunia joined our practice in January 2018 looking to expand her opportunities after 4 years of experience in the dental field.  Born in Havana, Cuba, she graduated from Maritires de Chile in 2009 with a bachelor's degree in Computer Science.  Upon arriving in the country in 2011, Dunia soon pursued her certification in X-ray technology as well as expanded functions duties for dental personnel.


Humberto Espinosa – Orthodontic Consultant

Humberto comes from a family of dentists in Nicaragua and has worked at Greenstein Dental for more than 14 years.

Humberto provides patients humor and sensitivity, and he assists in orthodontics, dental lab work, computer-assisted crown fabrication, radiologic analysis of digital films and just about everything in between!

He received his dental degree at the Universidad Americana in Managua, Nicaragua in 1998 and then his orthodontic degree in Guadalajara, Mexico. He completed a General Practice residency at Jackson Memorial Hospital in 2003.

Humberto is a member of multiple dental organizations including the American Dental Association, World Federation of Orthodontists, and the Mexican Academy of Orthodontists.

He has traveled extensively with Dr. Greenstein attending various continuing education seminars including topics such as Craniomandibular & Craniocervical Physiology, TMJ symposia, K7 Instrumentation, CEREC CAD/CAM technology, Invisalign and the use of mini-implants for orthodontic movement of teeth.

Humbertos enjoys spending time with his wife, Catalina, and two sons, Nicolas and Sebastian.

Greenstein Dental
11921 South Dixie Highway, Suite 206, Pinecrest, FL. 33156
Tel. 305.290.2293.