How Responsibility Is Shared Between Dentists, Specialists, and Labs

The crown fractured at the gum line fourteen months after it was placed. The general dentist's office said the lab had made it too thin. The lab said the preparation was over-tapered, which caused the porcelain to bear loading it wasn't designed to handle. The oral surgeon who had placed the implant the crown was attached to said the occlusion had been off from day one and nobody had adjusted it. Three providers, three different explanations, and a patient sitting in a dental chair with a broken restoration, a damaged implant, and no idea who was responsible for what.

Multi-provider dental cases are more common than patients expect. General dentists refer to oral surgeons. Oral surgeons refer to periodontists. Everybody orders from dental labs. When something goes wrong and there are multiple entities in the chain, Louisiana law under CC Art. 2315, CC Art. 2323, and the Louisiana Products Liability Act (La. R.S. 9:2800.51 et seq.) provides a framework for sorting out who bears what share of the responsibility. This article explains how that sorting works and what it means for a patient trying to understand who to pursue.

The General Dentist's Responsibility: Diagnosis, Referral, and Oversight

A general dentist is the patient's first point of contact for most dental care and carries ongoing responsibility for the patient's overall dental health even when work is delegated to specialists. That responsibility includes knowing the limits of their own competence and referring out when a case exceeds it.

The referral obligation is not just a matter of professional courtesy. A dentist who undertakes a procedure beyond their training or who fails to recognize that a patient's condition requires specialist evaluation has breached the standard of care under La. R.S. 9:2794 if harm results. A general dentist who attempts a complicated wisdom tooth extraction that should have been referred to an oral and maxillofacial surgeon, and injures a nerve in the process, carries liability for the injury regardless of whether an oral surgeon would have caused the same outcome.

When a referral is made, the general dentist's obligations don't end at the handoff. A dentist who refers a patient to a specialist must provide that specialist with adequate clinical information: relevant radiographs, the patient's complete medical and dental history, the clinical problem requiring specialist care, and any relevant prior treatment history. A referral to an oral surgeon for implant placement without forwarding the patient's medical history, including conditions like bisphosphonate use or uncontrolled diabetes that significantly affect implant success, can make the referring dentist partially responsible for an outcome the specialist might have avoided with that information.

There's also the question of follow-up after specialist treatment. When a patient returns to the general dentist after specialist work, the general dentist is expected to assess whether the specialist's work was integrated appropriately into the patient's overall oral health. A general dentist who restores on top of an implant without verifying osseointegration, or who places a crown without checking the occlusion, owns the consequences of those decisions regardless of who did the upstream work.

Specialist Liability: A Higher Standard for a Narrower Scope

Specialists, oral and maxillofacial surgeons, periodontists, endodontists, prosthodontists, and orthodontists, are held to the standard of care of their own specialty. That standard is generally higher than a general dentist's standard for the same procedure, because the specialist's training and claimed expertise justify the referral in the first place. A patient referred to an oral surgeon for a complex extraction, rather than having it done by the general dentist, is entitled to the skill of a competent oral surgeon, not merely a competent general dentist doing extraction work.

We explain how fault percentages and deadlines work after a Louisiana injury in our 2026 Tort Reform Survival Guide.

Specialist liability arises when the specialist's own conduct in the procedure or in the management of the case falls below what a reasonably competent specialist in that field would have done. An oral surgeon who places an implant without adequate three-dimensional imaging in a high-risk anatomical location, an endodontist who perforates a root without recognizing or disclosing it, a periodontist who fails to identify active bone loss before placing an implant are each subject to the standard of their own specialty.

Specialists also carry responsibility for communicating their findings back to the referring dentist and to the patient. An oral surgeon who identifies a suspicious lesion during an extraction procedure and does not biopsy it or document it in the records and communicate it to the referring dentist has failed an obligation that exists independently of the extraction itself.

Dental Lab Liability: Products, Not Malpractice

Dental laboratories fabricate crowns, bridges, implant abutments, dentures, aligners, and other prosthetics based on prescriptions from treating dentists. When a lab's product is defective and that defect causes patient harm, the lab's liability arises not under the LMMA, because labs are not healthcare providers, but under the Louisiana Products Liability Act (La. R.S. 9:2800.51 et seq.).

A products liability claim against a dental lab can be based on a manufacturing defect (the product deviated from its intended specification), a design defect (the product's design made it unreasonably dangerous), or inadequate warnings (the lab failed to communicate material limitations of the product to the prescribing dentist). Common lab defects in dental malpractice cases include crowns with improper margins that allow bacterial ingress and secondary decay, bridges with inadequate metal frameworks that fracture under normal occlusal load, and implant abutments with dimensional errors that prevent proper seating.

The treating dentist is not off the hook just because the lab made a defective product. A dentist has an obligation to inspect prosthetics before placing them in a patient's mouth. A crown with visible marginal gaps, a bridge that rocks on the dies, or an abutment that doesn't seat properly are things a competent dentist should identify before cementation. A dentist who places a detectably defective restoration without inspection shares responsibility for the resulting harm.

Because lab claims fall under the LPLA rather than the LMMA, they proceed on a different track: directly to court, without a medical review panel, without the LMMA's damage cap. A case that names both the dentist (LMMA) and the lab (LPLA) runs on two parallel procedural timelines, which is one reason attorney involvement from the start is so important in multi-defendant dental cases.

Vicarious Liability: When the Practice Is Responsible for Its People

Louisiana Civil Code Article 2320 makes employers vicariously liable for the acts of employees within the scope of their employment. For dental practices, this means the practice entity can be liable for the malpractice of dentists, hygienists, and assistants who are genuine employees of the practice. A patient harmed by a hygienist's negligent scaling technique, or by a dental assistant's improper administration of a medication, has a claim against both the individual and the practice.

The employee-versus-independent-contractor question matters here. Many dental practices structure their associate dentists as independent contractors, which would place them outside respondeat superior. Louisiana courts look at the substance of the relationship rather than the label: who sets the schedule, who provides equipment, who controls clinical decisions, whether the provider has a separate business identity. A dentist who works exclusively in one practice, uses the practice's equipment, follows the practice's protocols, and is compensated as a percentage of production may be found to be an employee in substance regardless of the contract's label.

Practices also carry direct liability for negligent credentialing: hiring or retaining a dentist with a disciplinary history or inadequate training for the procedures they perform, or for systemic failures like inadequate infection control, equipment maintenance, or clinical protocols that contribute to patient harm.

How CC Art. 2323 Allocates Fault Among Multiple Defendants

Under CC Art. 2323, a jury assigns fault percentages to every party in the case, whether there's one defendant or six. Each defendant is responsible for their own share of the damages. A patient recovers from each defendant according to that defendant's percentage, up to the applicable limit for that defendant.

Here's how that plays out in a Lake Charles implant case. A patient receives a failed implant and suffers nerve damage. The jury values total damages at $400,000. The oral surgeon is found 50% at fault for improper implant angulation without preoperative CT imaging. The general dentist is found 25% at fault for referring to an oral surgeon without forwarding a complete medical history that disclosed the patient's bisphosphonate use. The dental lab is found 15% at fault for providing an abutment with dimensional specifications that contributed to the angulation error. The patient is found 10% at fault for not disclosing the bisphosphonate use directly to the oral surgeon at the pre-surgical consultation. Recovery: $400,000 x 0.90 = $360,000, allocated among three defendants according to their respective fault shares.

Naming all three defendants in this scenario is what produced a recovery that reflects the full scope of the fault. Naming only the oral surgeon would have left the contributing failures of the general dentist and the lab unaddressed, and the oral surgeon's attorney would have argued that the other parties' fault reduced their client's share. Naming everyone with a role forces the fault allocation to account for everyone who contributed.

Frequently Asked Questions

Can I sue both my general dentist and the oral surgeon they referred me to?

Yes. Louisiana's comparative fault system handles multi-defendant cases by having the jury allocate fault percentages among all defendants. The general dentist may be liable for the referral decision, the adequacy of clinical information provided, or failure to follow up on specialist work. The oral surgeon may be independently liable for the procedure itself. Each is responsible for their own fault share, and naming both prevents either from escaping liability by pointing at the other.

Is a dental laboratory liable if a crown or bridge was defective?

Potentially yes, under the Louisiana Products Liability Act rather than the LMMA. Labs are manufacturers, not healthcare providers. A defective prosthetic, one with improper margins, inadequate material thickness, or dimensional errors, can generate a products liability claim directly against the lab that goes to court without a medical review panel and without the LMMA damage cap. The treating dentist may also share liability for placing a defective product without adequate inspection before cementation.

Is a dental practice responsible for its employees' mistakes?

Yes, under respondeat superior (CC Art. 2320), for genuine employees acting within the scope of their duties. The employee-versus-independent-contractor distinction matters: courts look at the substance of the working relationship, not just the contract label. Practices also carry direct liability for negligent credentialing, systemic failures in protocols, and inadequate oversight of the clinical work performed in their facilities.

What is a general dentist's obligation when referring a patient to a specialist?

To refer to an appropriately credentialed specialist, to provide complete clinical information including relevant imaging and medical history, and to follow up on the specialist's work when the patient returns to the practice. A referral that omits material clinical information, or that sends a patient to a specialist unequipped for the specific procedure, can create liability for the general dentist independent of what the specialist does or doesn't do.

Can I sue multiple dental defendants at the same time?

Yes. Louisiana's fault allocation system is built for multi-defendant cases. For LMMA-qualified providers, each must be identified in the PCF complaint. For non-LMMA defendants like dental labs, claims proceed directly in court. An attorney coordinates these parallel procedural tracks so the requirements for each defendant are met simultaneously and no deadline is missed because of confusion about which track applies to which defendant.

Legal Disclaimer: This article is for general information only and is not legal advice. Louisiana dental malpractice and products liability law has a lot of moving parts, and the facts of every case are different. Statutes, regulations, and case law also change over time. Reading this does not create an attorney-client relationship. If you were injured by dental treatment or a dental prosthetic in Lake Charles or Calcasieu Parish, talk to a licensed Louisiana personal injury attorney as soon as you can. The one-year prescriptive period for personal injury claims is strictly enforced.