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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.

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.

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.

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