Norman J. Hammer
Prosthodontics, Implant Prosthodontics
As a partner at the office, Dr. Hammer has maintained a clinical practice at The Dental Group at Post Office Square since 1990. Dr. Hammer received his dental degree from New York University in 1980. He completed a General Practice Residency followed by a two-year Prosthodontic Residency at the Veterans Administration Medical Center in Buffalo, NY.
His first university academic appointment, in 1982, was at the University of Buffalo School of Dental Medicine and in 1983 he moved to Boston to continue his teaching career with an academic appointment at Tufts University School of Dental Medicine. Presently, Dr. Hammer has a faculty appointment at Harvard University, School of Dental Medicine where he participates in the Advanced Graduate Education Program in Prosthodontics.
Dr. Hammer is a member of the American Dental Association and the Massachusetts Dental Society. In addition, he is a member of the American College of Prosthodontists and a Fellow of the Greater New York Academy of Prosthodontics. Dr. Hammer has an extensive history in academic dentistry and has also lectured extensively in the United States and abroad.
Nancy S. Arbree
DDS, FACP, MS
Dr. Arbree graduated from Georgetown University School of Dentistry and completed a General Practice Residency at the Veterans Administration in Gainesville, FL. She earned certificates in both Prosthodontics and Maxillofacial Prosthetics from Memorial Sloan-Kettering Cancer Center in New York City. Dr. Arbree received a Masters of Dental Science in Research from Tufts University School of Dental Medicine; her clinical research study was on the effect of implant-retained prostheses on geriatric nutrition.
Dr. Arbree is a Prosthodontist, a Diplomate of the American Board of Prosthodontics and a Fellow in the American College of Prosthodontists (FACP), where she served as the first female national President. She is also a member of the American Dental Association and the Greater New York Academy of Prosthodontics, where she also served as its first female President. At Tufts University School of Dental Medicine, Dr. Arbree served as Division Head of Clinical Complete Dentures Prosthodontics and created the first Implant Dentistry Course. Her presentations and publications are in the disciplines of complete dentures, implants and curriculum. Dr. Arbree was the Academic Dean at Tufts from 1996 to 2012. She was granted Professor Emeritus and Academic Dean Emeritus.
In 2012, Dr. Arbree was awarded the first Lifetime Achievement Award by the Georgetown University School of Dentistry Alumni. In 2014 and 2015, Dr. Arbree was awarded the Distinguished Service Award and the Dan Gordon Award, respectively, from the American College of Prosthodontists.
Dr. Arbree has been with the Dental Group at Post Office Square since 1999, where she limits her practice to Prosthodontics. She and her team make a special effort to make patients comfortable, while achieving the best care they can receive, both conservative and advanced.
Dr. Arbree lives in the Back Bay of Boston, where she enjoys spending time with family/friends/ her two Tonkinese cats, playing pickleball, walking, hiking, gardening, cooking, needlework, bridge, reading, theater, museums, touring historic homes and traveling.
DMD, General Dentistry, Esthetics and Botox
Dr. Lauren D. Gadeberg grew up in Central Maine before moving to New York where she earned a Bachelors of Science in Biology and a Bachelors of Administration in Policy Studies at Syracuse University. She went on to obtain her Doctor of Dental Medicine degree from Tufts University School of Dental Medicine in 2014, graduating in the top 10% of her class.
While in dental school, Dr. Gadeberg received a Navy scholarship as part of the Navy Health Professions Scholarship Program (HPSP) and served in the United States Navy after graduation. As Lieutenant at Camp Lejeune, NC, she honed her skills in a wide range of clinical disciplines, providing care to the military personnel there. Over the course of 4 years, Dr. Gadeberg treated over 7,000 Marines and Sailors. While at Camp Lejeune, she also earned the Navy and Marine Corps Achievement Medal, the Meritorious Unit Commendation Award, and the Navy Expert Marksmanship Medal.
Dr. Gadeberg is a member of the American Academy of General Dentistry, the American Dental Association and the Massachusetts Dental Society. She is enrolled in the American Academy of Implant Dentistry(AAID) MaxiCourse at Rutgers University and is working to achieve her fellowship with the AAID. She is trained in and has experience with state-of-the-art emerging dental technologies including CAD-CAM 3-D imaging and printing of ceramic restorations.
Dr. Gadeberg is happy to be living once again in New England and is excited to practice dentistry in Boston at the Dental Group at Post Office Square. In her spare time she loves to run, ski, hike and travel the world.
John N. Govostes
DMD, Periodontics and Implantology
Dr. Govostes received his Bachelors of Science degree from the University of New Hampshire and then went to attend Tufts University School of Dental Medicine where he received his dental degree (DMD) and then later his specialty training in Periodontology. Dr. Govostes is a Board Certified Periodontist.
Dr. Govostes limits his clinical practice to the field of Periodontics which focuses on patient education as well as the preservation of teeth through various non-surgical and surgical therapy modalities in the treatment of gum diseases (periodontitis), as well as implant dentistry and the treatment of other oral pathologic conditions associated with the mouth. The various services offered but not limited to, are the: reduction of gingival pocketing, cosmetic correction of recession and reconstruction with various gum grafting techniques, removal of hopeless teeth, replacement of missing or hopeless teeth with dental implants, as well the augmentation of bone which is often times needed for future dental implant placement.
Dr. Govostes is a member of the American Academy of Periodontology, the Massachusetts Society of Periodontics, the Massachusetts Dental society, as well as a member of Delta Sigma Delta organization which is an International Dental Fraternity. Dr. Govostes has served the public by working in community dental clinics in Colorado as well as volunteering for Dental missions to Quito, Ecuador where he treated the underprivileged community. He also serves as a guest lecturer at the Yankee Dental Convention in Boston MA. Dr. Govostes concerns himself with his patient’s comfort, relaxation, and education as well as the quality of care he provides.
D.D.S, Orthodontics and Invisalign
Dr. Shaima Tabari is an American Board of Orthodontics certified orthodontist who is part of The Dental Group at Post Office Square team. She is a dual trained orthodontist with experience working in the US and the UK. She completed her 4-year doctorate program in orthodontics from the Harvard School of Dental Medicine with her thesis focusing on Obstructive Sleep Apnea. Patients visit her for reasons such as Invisalign®, braces and follow-ups on a range of other orthodontic treatment procedures. Dr. Tabari strives to provide patients with a holistic individualized treatment plan which best complements and enhances their quality of life.
In addition to her excellent educational pedigree, she is an avid skier licensed in avalanche search and rescue operations. She also enjoys learning new languages and can so far speak English, French, Farsi, Arabic, Spanish and Icelandic.
DMD, DDS, CAGS, Esthetic Dentistry
Dr. Papathanasiou earned her Doctor of Dental Medicine degree from Tufts University School of Dental Medicine and is the Director of Advanced Graduate Esthetics and Operative Dentistry in the Department of Prosthodontics. After graduating from the University of Athens Dental School in 1995, Dr. Papathanasiou accepted a full-time faculty position at Tufts in the Department of Prosthodontics and Operative Dentistry where she has been teaching and conducting research.
Shortly after completing her undergraduate dental studies, Dr. Papathanasiou received a Postgraduate Certificate in Operative Dentistry, Endodontics and Cariology from Aarhus University, Royal Dental College, Denmark, and later received additional postgraduate training at Tufts University School of Dental Medicine, where she earned a Postgraduate Certificate of Advanced Education in Esthetics Dentistry.
Dr. Papathanasiou is an internationally recognized lecturer and has numerous publications in peer-reviewed dental journals. She was the Editor-in-Chief of the Greek dental journal Esthetic Dentistry and Implantology and is on the editorial team of Reality Esthetics and the editorial review board of Journal of Cosmetic Dentistry.
Dr. Papathanasiou has two children and when not working, she enjoys spending time with her family and friends, traveling and engaging in numerous sports.
Invisalign® Special Event Days on 7/13/22 & 7/27/22
This summer, our office will be hosting two Invisalign® Special Event Days during which our board-certified and Harvard trained Orthodontist, Dr. Shaima Tabari, will be providing free Invisalign® consultations for those who reserve a spot. Those who sign up not only receive a free consultation, but they will also receive $500 off of their treatment, as well as a free retainer upon treatment completion.
To schedule your free Invisalign® consultation with Dr. Tabari on either 7/13/22 or 7/27/22, please call or text our office today. Space is limited!
Welcome to The Dental Group at Post Office Square
The quality of comprehensive dental care improves when highly specialized, caring practitioners share their knowledge, skills, and resources in a group setting. At The Dental Group at Post Office Square, our skilled doctors and staff utilize our experience, resources and our contemporary facility to create an effective, gentle and comfortable dental experience for individuals and families in the metropolitan Boston area.
We are committed to providing each patient that walks through our doors with the highest quality dental care experience, and our state-of-the-art facility employs the most modern equipment and techniques available in the dental profession. Give us a call today, we can't wait to help you begin your journey towards achieving great oral health!
Comprehensive Dental Services
The Dental Group at Post Office Square provides specialized dental care for patients of all ages. A description of some of our services and technologies can be found below.
- Zoom Teeth Whitening
- Porcelain Veneers
- Dental Crowns
Specialty Dental Care
- Periodontics & Gum Therapy
- Wisdom Teeth Extractions
Preventative Dental Services
- Dental Cleanings & Oral Hygiene
- Oral Cancer Screenings
- Non-surgical Gum Treatment
- Single Tooth Implants
- Full Upper or Lower Jaw Replacement
- Snore Guards
- Athletic Biteguards
- Sleep Apnea Appliances
- Botox® and Dermal Filler
- TMJ & Facial Pain Therapy
The PremierOne Dental Plan
Since this is not insurance, patients without dental benefits can opt to join the PremierOne Dental Plan. No pre-authorization of any kind is required. Furthermore, there are no maximums or limitations on pre-existing conditions. Click here to learn more about this helpful option.
A Focus on Education
At The Dental Group At Post Office Square, all of our practitioners are affiliated with local institutions of higher education. Our team works together seamlessly and are often found consulting on each other's individual diagnoses and procedures. Our patients benefit from our knowledge of the best and newest dental advancements and we always take the time to educate our patients about their oral health and their available treatment options so they can be involved in choosing the best direction for their care.
Meet Our Doctors
Our staff of skilled doctors are able to fulfill patient needs in all aspects of dentistry. We are experienced in general dental services as well as specialized services from periodontal treatments and orthodontics to prosthodontics. Learn more about our amazing team of doctors below.
Norman J. Hammer
Jack B. Share
Nancy S. Arbree
DDS, FACP, MS
John N. Govostes
DMD, DDS, CAGS
Request an Appointment Online
To schedule an appointment you may call our office at (617) 426-6011 or complete the appointment request form below. We will then contact you within one business day to confirm your appointment. If this is an emergency, or if you are trying to cancel or change an existing appointment, please call the office directly.