About Us

Meet the Team

The people behind our calm, modern Winter Garden office bring together patient-focused care, anesthesia support, patient coordination, and thoughtful communication at every step.

Who may be a good candidate

Signs retreatment may be worth considering

Not every previously treated tooth should be retreated, but many can be. The key question is whether the tooth remains restorable and whether there is a clear clinical reason to believe another attempt can improve the outcome.

Symptoms

Pain that returned after a prior root canal

Some teeth become symptomatic again because infection persisted in difficult anatomy or reentered through a leaking restoration.

  • Recurring pain or pressure when chewing
  • Lingering tenderness in a previously treated tooth
  • Intermittent flare ups months or years later
Clinical findings

A tooth that still has a realistic restorative future

Retreatment makes the most sense when the tooth structure, periodontal support, and restorative plan still give the tooth a practical chance to function long term.

  • Persistent infection around the root tip on imaging
  • A prior crown or filling that may have leaked over time
  • Anatomy or prior treatment details that can likely be improved
Referral reasons

A previous root canal that deserves a specialist review

Your general dentist may refer you when the diagnosis is unclear, when symptoms do not match the X rays well, or when advanced technology is needed to decide whether retreatment or another option makes the most sense.

  • Missed canal suspicion or complex anatomy
  • Calcification, posts, or restorative obstacles
  • A tooth you hope to save if there is a predictable path forward

Who you'll meet

A supportive team built around precision and patient comfort

Every role in the office contributes to a smoother experience, from advanced diagnosis and anesthesia support to scheduling, communication, and chairside care. The result is an environment that feels polished, personal, and reassuring.

Dr. Mark Dreyer
Founder
Mark Dreyer DMD, PA

Dr. Dreyer graduated from the University of Florida, completing undergraduate studies in 1981 and dental school in 1986. Since limiting his practice to endodontics in 2000, he has completed more than 25,000 root canals.

He is a member of the American Dental Association and a founding member of the International Academy of Endodontics. Outside the office, he enjoys time with his wife Diane, weekends at race tracks such as Sebring Raceway, and camping in their RV.

University of Florida 25k+ root canals Endodontic Care Since 2000
Dr. Amit Khetan
Dentist Anesthesiologist
Amit Khetan, DMD

Dr. Khetan is a board eligible dentist anesthesiologist with advanced anesthesia training.

Donna Smith
Office Manager
Donna Smith

Donna has over three decades of experience helping patients feel comfortable.

Semra Eichelberger
Marketing Director
Semra Eichelberger

Semra blends healthcare insight with creative marketing strategy.

Elizabeth Quiroz
Dental Assistant
Elizabeth Quiroz

Elizabeth helps patients feel relaxed and supported during treatment.