Meet Our Doctors
Dr. Alireza Hamidzadeh
Dr. Alireza Hamidzadeh, DDS, MS
Dr. Hamidzadeh (Dr. H) has been distinguished through peer review as Top Doctor in the DMV and listed as Best Doctor in Washngtonian publication. Dr H focuses on surgical and Same Day interventions while providing most comfort through IV Sedation
Dr. Alireza Hamidzadeh DDS, MS, is a U.S. Army Comprehensive Dentist trained rigorously in all specialties of dentistry both didactically and clinically.
He has conducted the first ever human randomized clinical trial on application of a certain wound dressing (Sockit!) after impacted wisdom teeth extraction and has received the U.S. Army Commendation Medal for his achievements.
He has served as a Clinical Adjunct Professor at the U.S. Navy Post Graduate Dental School at Walter Reed National Medical Center, where Navy doctors receive their specialty training.
Dr. Alireza Hamidzadeh first graduated from engineering school with the highest honor (Suma Cumm Laude) and worked as an engineer for many years before studying medicine and dentistry. Dr. Hamidzadeh (Dr. H) graduated at the top of his class from the University of New York, School of Dentistry with extracurricular achievements in Oral Medicine.
He continued his studies through a rigorous board selected DoD specialty in Comprehensive Dentistry at Carl R. Darnall Medical Center at Fort Hood, Texas while concurrently completing a Master of Science degree in advanced Oral Biology at Uniformed Services University at Walter Reed National Medical Center. Dr. H has extensive training in Oral Surgery and Dental Implants procedures, Advanced Grafting, Oral Medicine, Pain Management, and IV Sedation, hence providing his patients with a very high level of comfort during procedures.
He has also received extensive training in restorative dentistry such as Full Mouth Reconstruction and Rehabilitation, Cosmetic Dentistry, and Root Canal Therapy.
As a Veteran, he values honor, integrity and the concept of service before self. He has volunteered at Free Dental Clinics and routinely has worked with Dental Charities.
Patients from coast to coast in the continent of United States and Canada come to see Dr. Hamidzadeh for his unique combination of skills and credentials. Dr. H welcomes new patients and looks forward to serving the community near or afar at Happy Smiles Dental. If You Don’t Have a Happy Smile, You Can Always Take One of His!
Dr. Andrew Avillo
Dentist
Dr. Andrew Avillo joined the Happy Smiles Dental team in 2024 following a distinguished 25-year career in the US Navy. While in the Navy, Dr. Avillo completed two separate residencies – a 1-year General Practice Residency and later a 2-year Comprehensive Dentistry residency at the Naval Postgraduate Dental School (NPDS) in Bethesda, Maryland. He also served as the Dental Department Head on two ships: USS Comstock (LSD 45) and USS Ronald Reagan (CVN 76). In addition to tours in Iceland and Parris Island, SC, he was a dental residency program director for 10 years, first at Naval Medical Center San Diego and then eventually back at NPDS. He retired at the rank of Captain and received multiple meritorious commendations. Perhaps of greatest interest to most patients was that Dr. Avillo served as the primary dentist for the Presidents of the United States from 2017-2024. In this role, he also provided care for current and former First Families, as well as numerous other civilian and military leaders in the highest levels of our government.
Dr. Avillo is board certified by the American Board of General Dentistry, a Fellow in the Academy of General Dentistry, and earned a Master’s Degree in oral biology from George Washington University. He has maintained his affiliation with the military as an adjunct professor of Comprehensive Dentistry at NPDS on the campus of Walter Reed National Military Medical Center. A recognized expert in postgraduate dental education, he serves as a site visitor for the American Dental Association’s Commission on Dental Accreditation. His clinical focus is on providing conservative, long-lasting treatment with an emphasis on esthetics. He will work with patients to help them achieve their goals of a healthy mouth and a smile that feels natural and looks great.
A native of York, PA, Dr. Avillo graduated from Franklin & Marshall College where he studied history. He then attended the University of Maryland School of Dentistry prior to commissioning in the US Navy Dental Corps. He’s been married for over 20 years and has 3 children.
Professional affiliations:
American Dental Association
Academy of General Dentistry
Special Care Dentistry Association
American Board of General Dentistry
Maryland State Dental Association
Dr. Richard Nemes
Dentist
Dr. Richard Nemes joined Happy Smiles as an Associate in 2023, bringing with him a reputation for a calming demeanor and a wealth of experience. A native of Maryland, Dr. Nemes graduated from the University of Maryland Dental School in 1987. His extensive career spans both general practice and specialized denture clinics. In addition to his role at Happy Smiles, he contributes his expertise to the Maryland Correctional System, serving various facilities. Dr. Nemes appreciates the advanced technology at Happy Smiles, noting, “Happy Smiles is the most clinically advanced office I have ever worked in. They are constantly advancing with state-of-the-art scanning and same-day restorations.
Dr. Sorina Lim
Dentist
Dr. Sorina Lim is committed to providing personalized, high-quality dental care in a comfortable and supportive environment. She understands that many patients may feel anxious about dental visits and works to create a positive experience for each one. Dr. Lim emphasizes open communication, encouraging patients to ask questions and ensuring they fully understand the reasoning behind every recommendation. Her passion extends to working with patients of all ages, from children visiting the dentist for the first time to adults seeking to improve their oral health. Whether it’s a routine cleaning, cosmetic procedure, or more complex treatment, Dr. Lim aims to help patients feel confident and informed about their dental care. Her ultimate goal is to empower patients with the knowledge and tools they need to maintain a healthy, beautiful smile for life.
Dentistry has been a childhood dream of Dr. Lim’s since she was in elementary school. After high school, she was formally trained as a dental assistant and received her oral radiology license from the College Community of Baltimore County. As a proud Maryland native, Dr. Lim attended the University of Maryland, College Park, where she was part of the University Honors Program. She worked as a dental assistant for four years while studying for dual degrees in Art History and Biology. Dr. Lim then received her dental degree from the University of Maryland School of Dentistry. During her time in dental school, she was selected to be in the Gorgas Odontological Honors Society and Gamma Pi Delta Society for Prosthetics Honors.
In her spare time, Dr. Lim enjoys hiking local trails and exploring art museums. A passionate artist, she loves painting and sculpting in her free moments. Outside of her dental practice, Dr. Lim is dedicated to volunteering, with a strong emphasis on spreading awareness about oral health education. She frequently visits elementary schools to inspire young students to adopt healthy habits from an early age.