795 Turnpike Street
North Andover, MA 01845
(978) 685-8313 Request an Appointment

Cosmetic Dentistry

You can have the smile you've always wanted – straighter, whiter, shapelier, fuller!

Preventive Dentistry

We are dedicated to helping your family achieve optimal dental health with regular hygiene cleanings at Willows Dental Group.

Restorative Dentistry

With advanced technology and experienced staff, we can repair or rebuild your smile.


Do you want straighter teeth but don’t want the look of traditional metal braces? Luckily there’s a new solution available—clear braces from Invisalign.

Meet Our North Andover Team

North Andover Dental Team


Dr. Gerry Casazza, Our Founder

Dr. Gerry CasazzaFor over 25 years, Dr. Gerry Casazza has brought exceptional dentistry to patients throughout New England. Dr. Casazza strives for excellence in all aspects of dentistry and patient care. His state-of-the-art methods have made him a master diagnostician, mentor and coach to other health professionals.

Dr. Casazza received a prestigious fellowship from the Academy of General Dentistry in 2001, and continues to be an AGD member. He is the recipient of numerous awards and honors, including Top Dentist Awards from TopDoc and the Readers’ Choice Best Dentist Awards. He is a former president of the East Middlesex District Dental Society, and is an active member of the Massachusetts Dental Society.

With an approach called “Healthy Body Dentistry,” Dr. Casazza treats your oral health as a part of your overall health. By focusing on prevention, overall well-being and personalized treatment, he ensures each patient receives the best care possible. His practice has become an industry leader in this oral systemic approach.

Dr. Casazza is also known as an expert in advanced forms of dentistry, including dental implants. He is one of the few dentists in Massachusetts to perform both the surgical and reconstructive phases of implant dentistry for over 15 years, with an impressive 90% plus success rate.

After attending Boston College for his Bachelor’s Degree, Dr. Casazza earned his D.M.D. from Tufts University School of Dental Medicine in 1991. He graduated in the top 5 of his class in dental school. For his outstanding achievements, he was elected to the Omicron Kappa Upsilon National Dental Honor Society.

Dr. John Gilliland

Dr. John Gilliland

Dr. Gilliland’s passion for dentistry is driven by experiences in his own life. Fifteen years ago, as a young chef and restaurant owner, his father was diagnosed with Stage IV Oral Cancer. The impact of this on his family inspired him to rethink his professional life. “I recognized the importance of thorough examination and early intervention, and I learned that I wanted to help people in a more profound way,” he explains. His father survived his diagnosis, and Dr. Gilliland later went on to earn his Doctor of Dental Surgery (DDS) degree from the University of Maryland School of Dentistry.

In addition to General Dentistry, Dr. Gilliland is experienced in a wide range of advanced treatment and care. Surgical, cosmetic, periodontal, implant, endodontic, prosthetic and restorative dentistry are among his skills. He was an Oral Surgery Clerk at the University of Maryland School of Dentistry, completed a hospital-based general practice residency with the Wilkes-Barre VA Medical Center, and has earned the distinction of Surgical Fellow with the Misch International Implant Institute and Fellow of the International Congress of Oral Implantologists.

Dr. Gilliland believes in dental care that is focused on quality, not quantity, which makes him a great fit for our practice. “I was looking for an excellence-driven practice, where the focus is on giving the patient the time and attention they need,” he says.

Dr. Gilliland is engaged to be married to Ela, a family medicine physician resident at Tufts University. In his free time, he enjoys outdoor activities such as hiking, mountain-biking and kayaking.