Herbert S. Birnbaum, DMD
Building Trust One Smile at a Time
Call: (617) 965-1400

Meet The Team

Meet Herbert S. Birnbaum, DMD Dentistry Team in Newton Centre - Periodontist, Dental Hygienist & More

Dr. Ashira Gendelman


Dr. Ashira Gendelman received her B.A. in Biological Sciences from Wellesley College, where she graduated with Latin Honors. While in college, she was granted the Howard Hughes Medical Institute Research Award for her molecular genetics research at Massachusetts General Hospital and contributions to several scientific publications. She received her Doctorate of Dental Medicine degree from Harvard University, and upon graduation, was the selected recipient of the Student Achievement Award in Oral Implantology. While in dental school, Dr. Gendelman served on the admissions committee, curriculum committee, and as the Harvard Chapter President of Alpha Omega Dental Fraternity. In addition, Dr. Gendelman provided dental care and oral health education to at-risk, homeless, and runaway youth in the Boston community, conducted developmental biology research and received a grant to study abroad at Hadassah Hebrew University School of Dental Medicine in Jerusalem.   

Currently, Dr. Gendelman enjoys patient care, research, and teaching, as she pursues advanced graduate degrees in Orthodontics at Harvard University. She currently lives in Cambridge with her husband, and her hobbies include studio art, dance, and hiking.

Dr. Gendelman is a longtime member of our team, having interned with us before attending dental school and having developed our office manual.  We are delighted to have her add her outstanding skills to our office, expanding our availability to our patients by offering Sunday and weekday evening hours.

Constant C. Crohin, DMD, MMSc.

Periodontist (Gum Specialist)

Dr. Crohin received his undergraduate degree from the University of Southern California in Molecular Biology and then matriculated to  Harvard School of Dental Medicine, where he graduated Magna Cum Laude with a Doctorate of Dental Medicine (DMD), and a Masters of Medical Sciences (MMSc.) degree. He then decided to continue at Harvard, pursuing further studies in the specialty of periodontics.

Dr. Crohin works part-time at Dr. Birnbaum’s office. He provides various non-surgical and surgical approaches to treating gum disease, as well as implant placements, bone and gum graft replacements. He is a strong advocate of improving patients’ oral health and actively educates in areas such as proper oral hygiene and smoking cessation. He teaches periodontology and dental implant placement as a part-time clinical faculty member at Harvard University. He is an active member of several professional organizations including the American Academy of Periodontology and the Harvard Odontological Society.

Chris Stack

Dental Hygienist

Chris has been a dental hygienist for 25 years.  She is a graduate of Forsyth School for Dental Hygienists and Northeastern University.  Chris is a highly skilled hygienist who takes pride in providing excellent dental care.  She firmly believes in educating her patients to achieve and maintain optimal dental health.  Chris has two daughters and enjoys spending time with them skiing, traveling and biking.


Sarah Dobson

Dental Hygienist

Sarah is a graduate of the Forsyth School of Dental Hygiene at the Massachusetts College of Pharmacy & Health Sciences University.  She grew up in Merrimac, on the North Shore of Massachusetts, and currently resides in Boston.  Sarah's upbeat attitude, gentle touch and a strong passion for patient care have resonated with our patients and made her a perfect fit for the office.  In her spare time, Sarah enjoys nature, live music and traveling.

Laura Brennan

Dental Hygienist

Laura began her dental career in 2010 as Dr. Birnbaum’s Dental Assistant. She went on to receive her hygiene degree from the Forsyth School of Dental Hygiene in 2013.  Patients are drawn to her bubbly personality and the passion she has towards dentistry. Laura is a member of Massachusetts Dental Hygiene Association and also has her local anesthesia license. She attends the Yankee Dental Congress every year as well as other continuing education classes to keep current in the dental field.

When she is not chairside, Laura enjoys traveling with her family and friends, boating and long walks with her dog Cooper.



Nickole Scolastico

Dental Assistant

After graduating from the Lincoln Technical Allied Health Institute, Nickole began working in a large multi-specialty practice, where she quickly rose up the ranks to being the head assistant.  The corporate style of dental practice left something to be desired for her, and, in subsequently joining our team, Nickole's clinical excellence, focus on quality, and down to earth warmth found a perfect home.  Her background as a cheerleader continues to manifest in the smiles she puts on the faces of our patients and in the half-marathons she loves to run for charity.

Linda Ryan

Office Manager

At age 11, Lin Ryan decided to pursue a career in the dental field, and has spent the rest of her life fulfilling this dream.  Trained at Beth Israel Hospital, she began her career as a dental assistant.  As her broader knowledge of dental office operations grew, she assumed the role of Office Manager, and has flourished in this position since.  She is a member of the American Association of Dental Office Managers and the local chapter of the New England Practice Administrators and Managers.

Aside from helping out the patients in our office, Lin’s greatest passion is being involved in and giving back to the community.  She is involved with Trinity Church in Boston and Beacon Hill Women’s Forum, where she is Neighborhood Narrative Coordinator.  While she is an avid reader and enjoys working out, nothing gives her greater joy than spending time with her grandchildren.


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Office Location

  • Newton Centre
  • 670 Beacon Street
  • Newton Centre, MA
  • 02459
  • Map & Directions
  • Call: (617) 965-1400