Filing a Dental Malpractice Lawsuit in Connecticut: C.G.S. § 52-190a & Statute of Limitations

Pursuing a dental malpractice claim in Connecticut requires navigating some of the most rigorous procedural statutes in New England. Unlike a standard motor vehicle collision lawsuit, a dental negligence action cannot simply be drafted and filed in Superior Court without first satisfying strict statutory prerequisites.

Understanding Connecticut General Statutes § 52-584 (the Statute of Limitations) and § 52-190a (the Reasonable Inquiry Certificate) is essential for any patient who has suffered a severe dental injury.

1. The Mandatory C.G.S. § 52-190a Good-Faith Opinion Letter

Under Connecticut General Statutes § 52-190a, no civil action alleging malpractice by a health care provider—including a general dentist, orthodontist, prosthodontist, periodontist, or oral surgeon—may be filed unless the attorney or claimant has made a "reasonable inquiry as permitted by the circumstances to determine that there are grounds for a good faith belief that there has been negligence in the care or treatment of the claimant."

To satisfy this statute, the complaint must be accompanied by:

• A Written & Signed Expert Opinion Letter: Authored by a "similar health care provider" (as strictly defined by C.G.S. § 52-184c—meaning a specialist board-certified in the same discipline if the defendant is a specialist, or an active practitioner in the same field).
• Detailed Basis for Negligence: The expert letter must explicitly state that there appears to be evidence of dental negligence and provide a detailed basis for that conclusion based on a review of the patient's dental records and imaging.

Failure to attach a legally compliant opinion letter from a properly qualified "similar health care provider" exposes a lawsuit to dismissal for lack of personal jurisdiction.

2. Connecticut's Dental Malpractice Statute of Limitations (C.G.S. § 52-584)

Time is the most critical factor in any Connecticut dental malpractice evaluation. Under C.G.S. § 52-584:

• Two-Year Discovery Rule: An action must be brought within two (2) years from the date when the injury is first sustained or discovered, or in the exercise of reasonable care should have been discovered.
• Three-Year Statute of Repose: No action may be brought more than three (3) years from the date of the act or omission complained of, except in specific circumstances recognized by Connecticut appellate precedent.
• 90-Day Statutory Extension: Under C.G.S. § 52-190a(b), a claimant may petition the Clerk of the Superior Court where the action will be filed for an automatic ninety (90) day extension of the statute of limitations to allow time to obtain dental records and complete the good-faith expert inquiry—provided the petition is filed *before* the underlying limitation period expires.

3. Why "Last Visit to This Dentist" Matters: Continuing Course of Treatment

In many dental cases—such as failed dental implants, undiagnosed oral cancer, or ongoing orthodontic damage from AGGA/CAB appliances—the dentist continues treating the patient for months or years after the initial error while reassuring the patient that symptoms will resolve. Under Connecticut's Continuing Course of Treatment or Continuing Course of Conduct doctrines, the three-year repose period may be tolled while the patient remains under the dentist's active care for the same condition.

Because gathering complete dental charts, Cone Beam CT scans, and independent expert reviews takes weeks, injured patients should seek senior trial counsel evaluation as early as possible.