What D3428 means

D3428 covers a bone graft in conjunction with periradicular surgery — per tooth, single site. "D" is dental, "34" is the apicoectomy/periradicular surgery group, and "28" is this associated bone graft. During periradicular surgery (like an apicoectomy), removing the infected tissue and root tip can leave a bony defect (a void in the bone) around the root area, especially if the infection had destroyed bone. To support healing and help the bone regenerate to fill the defect, bone graft material can be placed in the defect. D3428 covers this bone graft, reported per tooth for a single site.

The bone graft material (which can be the patient's own bone, donor bone, or synthetic material) provides a scaffold and support for new bone to form, helping the bony defect heal and fill in with new bone over the following months, improving the outcome and the support around the tooth.

It's billed in addition to the periradicular surgery (such as the apicoectomy, D3410/D3421/D3425) — it's an adjunctive procedure that supports the surgery's healing. For an additional contiguous tooth in the same surgical site, D3429 is used. Related adjuncts include biologic materials (D3431) and guided tissue regeneration (D3432). Coverage is under endodontic/surgical benefits, often with documentation justifying the graft (the bony defect). Not every periradicular surgery needs a graft — it's used when a defect warrants it.

When it's typically used

D3428 is reported when bone graft material is placed in the bony defect around a tooth's root during periradicular surgery (like an apicoectomy) — to support healing and bone regeneration in the defect left after removing infected tissue and the root tip. It's reported per tooth for a single site, in addition to the surgery.

How much does D3428 cost?

A bone graft with periradicular surgery is a moderate fee, often roughly 200 to 500 USD per tooth/site depending on region and the graft material — billed in addition to the periradicular surgery (apicoectomy, etc.). It's used when a bony defect warrants grafting to support healing. Related adjuncts (membranes, biologic materials) may be separate.

Is D3428 covered by insurance?

Covered under endodontic/oral surgery benefits, often around 50-80 percent, when documented as necessary (a significant bony defect warranting the graft to support healing), with documentation (often radiographs showing the defect). It's billed in addition to the periradicular surgery. Some plans scrutinize bone grafts for necessity. A narrative explaining the defect and the graft's purpose helps. It's reported per tooth/site.

Why a bone graft may be needed in root surgery

A bone graft is sometimes needed during periradicular surgery, and understanding why clarifies its purpose.

During periradicular surgery like an apicoectomy, the surgeon removes the infected tissue (the lesion) around the root tip and the very end of the root. If the infection had been present for a while, it may have destroyed a significant amount of the bone around the root tip, leaving a bony defect (a void or cavity in the bone) once the infected tissue is removed. A large bony defect may not heal and fill in with new bone as readily on its own — the body can regenerate bone, but a large void can sometimes heal with less bone or with soft tissue ingrowth rather than fully regenerating bone. To support better bone healing and regeneration, bone graft material can be placed in the defect. The graft provides a scaffold and stimulus for new bone to form, helping the defect fill in with bone over the following months, improving the bony support around the tooth and the overall healing.

So a bone graft is used when there's a significant bony defect that would benefit from grafting to support proper bone regeneration. Not every periradicular surgery needs a graft — for small defects, the bone may heal well on its own. But for larger defects (especially from extensive prior infection), a graft can improve the bony healing and the long-term support around the tooth. The surgeon decides whether a graft is warranted based on the size and nature of the defect. For patients, understanding that a bone graft may be needed when periradicular surgery leaves a significant bony defect — to support better bone regeneration and healing — clarifies its purpose. It's an adjunctive procedure that helps the bone heal and fill in around the treated root, improving the outcome. The surgeon determines whether grafting is beneficial for the specific defect. Understanding why a graft may be needed helps patients see that it's used to support optimal bone healing when a significant defect warrants it, contributing to the success of the root surgery and the preservation of the tooth with good bony support.

How bone grafts support healing

Understanding how bone grafts support healing clarifies the role of this adjunctive procedure.

A bone graft supports healing of a bony defect through a few mechanisms. Scaffold: the graft material provides a physical scaffold or framework in the defect that supports and guides the formation of new bone — the body's bone-forming cells can grow into and along the graft material, using it as a structure on which to build new bone. Space maintenance: the graft fills and maintains the space of the defect, preventing it from collapsing or filling with soft tissue (which would prevent bone from forming there) — keeping the space available for bone regeneration. Stimulation: some graft materials also actively stimulate or support bone formation (depending on the material). Over the following months, the body forms new bone in the grafted defect, and the graft material is gradually incorporated or replaced by the patient's own new bone, resulting in the defect filling in with bone.

So the graft helps the bony defect heal with bone (rather than with less bone or soft tissue), improving the bony support around the treated root and the overall healing outcome. The graft material can be the patient's own bone, processed donor bone, or synthetic material, each providing the scaffold and support for new bone formation. This bone regeneration takes time (months) as the body forms and matures the new bone. For patients, understanding how a bone graft supports healing — providing a scaffold, maintaining the space, and supporting new bone formation — clarifies how this adjunctive procedure helps the bony defect heal with bone. It improves the bony healing around the treated root, contributing to better support for the tooth and a better surgical outcome. The graft works with the body's natural bone-regeneration capacity, enhancing it for a larger defect. Understanding the graft's role in supporting bone healing helps patients appreciate this adjunct's contribution to the success of the root surgery, helping the bone regenerate properly around the treated tooth for good long-term support and healing.

Bone grafts and related surgical adjuncts

Bone grafts are one of several adjuncts that can support periradicular surgery, and understanding them clarifies how they relate.

Several adjunctive procedures can support the healing of periradicular surgery, used as needed for the specific situation. Bone graft (D3428, per tooth/site; D3429 for an additional contiguous tooth): placing bone graft material in a bony defect to support bone regeneration, as discussed. Biologic materials (D3431): using biologic agents (such as growth factors or other materials) to aid the regeneration of soft and bony tissue, supporting healing. Guided tissue regeneration (GTR) with a membrane (D3432): placing a barrier membrane over the defect to guide the healing — the membrane keeps faster-growing soft tissue from filling the defect, giving the slower-forming bone the space and time to regenerate (often used together with a bone graft to contain it and guide bone formation). These adjuncts can be used individually or in combination, depending on the defect and the surgeon's approach, to optimize the healing and bone regeneration.

So the bone graft is part of a set of regenerative adjuncts available to support periradicular surgery — the surgeon may use a graft alone, a graft with a membrane (GTR), biologic materials, or combinations, tailored to the specific defect and goals. These adjuncts aim to improve the bony and tissue healing, the bone regeneration, and the long-term outcome, especially for larger defects. Each has its own code, billed in addition to the surgery. For patients, understanding that the bone graft is one of several regenerative adjuncts — alongside biologic materials and guided tissue regeneration membranes — clarifies how these procedures relate and that they're used as needed to support optimal healing. The surgeon selects the appropriate adjunct(s) for the specific situation. Understanding the range of adjuncts helps patients see that the bone graft (and possibly related adjuncts) is used to enhance the healing and bone regeneration of their root surgery when the defect warrants it, contributing to a better outcome through these regenerative techniques that support the bone and tissue healing around the treated tooth.

Healing and outcomes with a bone graft

Understanding the healing and outcomes with a bone graft helps patients know what to expect when this adjunct is used.

When a bone graft is placed during periradicular surgery, the healing proceeds with the graft supporting bone regeneration in the defect. After the surgery (with the graft placed and the gum closed), the initial soft tissue healing occurs over the first weeks (similar to surgery without a graft) — managing any swelling or discomfort with the post-operative care, and the gum healing. The bone regeneration in the grafted defect happens more gradually over the following months — the body forms new bone in the graft, filling in the defect, which is monitored over time (with X-rays at follow-up visits showing the bone filling in). The graft supports this bone regeneration, helping the defect heal with bone and improving the bony support around the treated root.

The outcome, when successful, is a well-healed bony defect filled with new bone, providing good support around the tooth and contributing to the overall success of the root surgery (the resolution of the infection and the preservation of the tooth with good bony support). Bone grafts generally support good healing of defects when appropriately used, improving the bony outcome compared with leaving a large defect to heal on its own. As with any procedure, the healing depends on factors like the defect size, the patient's healing capacity, and good post-operative care. For patients, understanding that a bone graft supports gradual bone regeneration in the defect over the following months — improving the bony healing and support — helps set expectations for the healing with a graft. The soft tissue heals in weeks, and the bone fills in over months, monitored with follow-up. The graft contributes to a better bony outcome. Understanding the healing and outcomes helps patients appreciate the graft's role in supporting good bone healing around the treated tooth, contributing to the success of the root surgery. The surgeon monitors the healing with follow-up to confirm the bone regeneration and the resolution of the problem, guiding the patient through the healing process toward a successful outcome with good bony support around the preserved tooth.

Frequently asked questions

What is the D3428 dental code?

It's a bone graft placed in conjunction with periradicular surgery (like an apicoectomy) — adding bone graft material to the bony defect around a tooth's root after the surgery, to support healing and bone regeneration. It's reported per tooth for a single site, in addition to the surgery.

Why is a bone graft needed in root surgery?

When the surgery (after removing infected tissue and the root tip) leaves a significant bony defect — especially from extensive prior infection — a graft supports better bone regeneration to fill the defect, improving the bony healing and support around the tooth.

How does a bone graft support healing?

It provides a scaffold for new bone to form on, maintains the space of the defect (preventing soft tissue from filling it), and supports bone formation. Over months, the body forms new bone in the graft, filling the defect with bone.

How much does a bone graft with root surgery cost?

Often around 200 to 500 USD per tooth/site depending on the graft material, billed in addition to the periradicular surgery. It's used when a bony defect warrants grafting. Related adjuncts (membranes, biologic materials) may be separate.

What other adjuncts support root surgery?

Biologic materials (D3431, to aid tissue regeneration) and guided tissue regeneration membranes (D3432, to guide healing and contain the graft). These can be used with or instead of a bone graft, tailored to the defect, to optimize healing.

Does every root surgery need a bone graft?

No — for small defects, the bone often heals well on its own. A graft is used when there's a significant bony defect (often from extensive prior infection) that would benefit from grafting to support proper bone regeneration. The surgeon decides based on the defect.

This page is an independent, plain-language explanation for general information only. It is not billing, coding, or clinical advice. For the official CDT descriptor and current-year wording, refer to the American Dental Association.