278 Lafayette Road, Bldg. E, Portsmouth, NH 03801 (603) 351-9125
278 Lafayette Road, Bldg. E
Portsmouth, NH 03801
(603) 351-9125

Our Staff

The first thing you will notice when you walk into our Portsmouth orthodontic practice is the incredibly friendly and inviting atmosphere. Members of our staff have been hand-picked to provide you the best possible experience during your visit to the orthodontist. Learn more about our team below.

Dr. James D. Spivey, DDS, MS, Periodontist

Portsmouth Periodontist When you are faced with a choice to improve your oral health, most people will choose to keep their teeth for a lifetime. Dr. Spivey has the knowledge, judgment, skill and experience to provide you with the care that you expect. Dr. Spivey is an experienced educator and dental practitioner. Since 1995, Dr. Spivey has been in full-time private practice in Portsmouth, New Hampshire. His practice centers on periodontics and dental implant services. He is known for his exceptional interpersonal skills, while excelling at clinical surgical care. As an experienced board certified specialist in periodontics, he provides traditional mucogingival, resective, and regenerative periodontal surgeries. He routinely performs dental implant care from a simple single tooth replacement to the most complex sinus lift, bone grafting, and full arch dental surgery.

Dr. Spivey's passion includes providing high quality, innovative periodontal services to the surrounding communities and professional services to national dental organizations. His goals involve working with the dental community to expand the concept of interdisciplinary health care, which encourages dentists and physicians to collaborate with periodontal specialists to provide comprehensive diagnosis and treatment. This emphasizes the importance of providing the best quality oral health care to his patients through education, collaboration and communication.


  • Professor in Periodontics,University of Iowa College of Dentistry
  • He taught dental implant surgery to residents and worked in the faculty dental practice.
  • Co-chair of the Interdepartmental Dental Implant Team,University of Iowa.
  • Introduced several new implant systems to the Periodontal department, while providing interdisciplinary periodontal services throughout the dental college.
  • This experience included extracting wisdom teeth, providing biopsies, and intravenous sedation.
  • Clinical instructor, Department of Oral and Maxillofacial Surgery at the University of Michigan.

Professional Associations:

  • Consultant to Northeast Regional Board of Dental Examiners Board.
  • Diplomate, American Board of Periodontology.
  • Diplomate, American Board of Oral Implantology / Implant Dentistry.
  • Member, Academy of Periodontology.
  • Member, American Dental Association.
  • Member, Academy of Implant Dentistry.
  • Member and Affiliate, Southeast NH Dental Society.

Dr. Juanita Fonseca, DDS, MS, Orthodontist

Dr. Juanita Fonseca is committed to providing excellent orthodontic care, and stands out as a leading orthodontist in Portsmouth, and surrounding neighborhoods. The doctor uses the latest in orthodontic techniques to provide you with a beautiful and healthy smile. Additionally, Dr. Fonseca believes strongly in education to prevent oral health problems before they occur, and makes sure to keep patients fully informed about their dental health. Read more about Dr. Fonseca below.

With over 25 years of experience in the dental field, Dr. Juanita Fonseca began her undergraduate education at the University of North Carolina at Chapel Hill, NC and then finished at the University of Connecticut in Storrs, CT where she received her Bachelor of Science degree. Continuing on with her thirst for knowledge and desire to help people, Dr. Fonseca went on to get her dental education at the University Of Michigan School Of Dentistry in Ann Arbor, MI where she earned her DDS degree.

After practicing in a private practice for one year in Ann Arbor, she spent the next 2 years on the faculty at the University Of Iowa, School Of Dentistry in Iowa City, IA. Here was able to train first-year dental students in dental diagnosis, radiology, oral pathology, and TMD – fulfilling both her love for teaching and working with young people. In addition to working with the dental students, she worked in the Oral Diagnosis Department at the dental school.

Dr. Fonseca then was accepted into a 2-year Orthodontic specialty program at the University of Iowa, School of Dentistry, where she graduated in 1992 with a Masters in Science. After practicing for a number years as an Orthodontist in a private practice in Iowa City, IA she and her husband decided to move back to New England to be closer to their family.

In keeping with Dr. Fonseca’s desire to provide her patients with the latest knowledge and the best dental care, she is a member of the Spear Study Club, Greater Southeast Dental Society, New Hampshire Dental Society, American Dental Association, and the American Association of Orthodontists.

Since 2011, Dr. Fonseca has been listed as a top Dentist in New Hampshire Magazine, a distinct honor where dentists are strictly voted on by their peers.

Dr. Fonseca presently resides in the New Hampshire seacoast area with her husband and three children, whom she loves spending time with. She also enjoys traveling, reading, seeing movies, going to the theatre, listening to music and skiing.

Office Hours

8:00 AM - 5:00 PM
8:00 AM - 5:00 PM
8:00 AM - 5:00 PM
8:00 AM - 5:00 PM
By Appointment

Submit a Testimonial

Dr. James D. Spivey, DDS, MS, PERIODONTIST
Dr. Juanita Fonseca, DDS, MS, ORTHODONTIST