About Your Dentist

Jeffrey Holdcraft, DMD

Dr. Jeffrey Holdcraft is a general dentist, and obtained his dental degree from Oregon Health & Science University. He strives to stay updated on the latest advancements in dentistry to provide suitable treatment options to his patients.

Dr. Holdcraft is a part of Associated Dental Care Providers, located in Tucson, AZ. Patients visit for halitosis, toothache, and bleeding gums. He can also offer suitable dental care regimes for periodontal diseases and dental abscesses.

Dr. Holdcraft believes in listening to each of his patients and ensures to provide the highest quality of care. He seamlessly delivers quality care, along with professional patient services.

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Brett Stringer, DMD

Dr. Stringer graduated from Dental School in Portland, Oregon. He practiced dentistry for 12 years in Portland before moving to Tucson in 2019. 

Dr. Stringer's practice focuses on prevention and he views oral health as part of overall health. He enjoys coming up with the best treatment plan possible by listening to patients' individual needs while applying evidence based care and his professional judgment. Dr. Stringer is interested in educating his patients to maintain a healthy smile and encourages a healthy life style of good food and exercise.

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Henry Barkett, DDS

Dr. Henry Barkett is a devoted general dentist. He received his doctor of dental surgery degree from the University of Missouri, Kansas City. He is known to have extensive knowledge of dental terminologies and procedures, and is also a member of the American Dental Association, Arizona Dental Association, and the Central Arizona Dental Association.

Dr. Barkett explains patients’ conditions and helps them choose an appropriate treatment plan. He is committed to the overall health and dental care of his patients through education and preventive measures.

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Michael Muul, DDS

Oral and Maxillofacial Surgeon

Dr. Muul has been an actively practicing surgeon for over 20 years. He prides himself on providing quality surgery and comfortable, safe anesthesia with a confident, yet friendly demeanor. As a Board Certified oral surgeon, he keeps current with his specialty by attending continuing education courses that cover all aspects of Oral and Maxillofacial Surgery.

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Paul Lingenbrink, DDS, MDS


“Be true to your teeth or they will be false to you.”

My Mission

“My mission is to provide good quality orthodontics, to help change people’s lives for the better, and to help them feel better about themselves.”

Education & Continuing Education

Doctor of Dental Surgery
University of Washington School of Dentistry – Seattle, Washington

Master of Dental Science
University of Connecticut School of Dental Medicine – Farmington, Connecticut

Certificate in Orthodontics
University of Connecticut School of Dental Medicine – Farmington, Connecticut

Professional Memberships

Dr. Lingenbrink is an active member of the American Association of Orthodontists, the American Dental Association, and the Arizona Dental Association.

Life & Hobbies

Dr. Lingenbrink enjoys a variety of athletic activities including baseball, softball, racquetball, tennis, skiing, snorkeling, and swimming.