WHAT ARE IMPLANT SUPPORTED DENTURES

What Are Implant-Supported Dentures?

Implant-supported dentures are a hybrid tooth replacement that combines the stability of dental implants with the full-arch coverage of a denture prosthesis. Unlike traditional dentures that rest on the gums and rely on suction or adhesive, implant-supported dentures snap onto or screw onto two to six implants embedded in the jawbone — delivering dramatically better retention, chewing force, and comfort.

At Lake Norman Oral & Facial Surgery in Huntersville, NC, Dr. Raymond J. Haigney II — a double board-certified oral and maxillofacial surgeon — offers multiple implant-supported denture options tailored to each patient's bone volume, budget, and lifestyle goals.

How Implant-Supported Dentures Work

The system has three components:

• Implants — titanium posts surgically placed into the jawbone (typically 2–6 per arch). Over 3–6 months, bone fuses to the implant surface through osseointegration, creating a permanent anchor.
• Attachments — small connectors (ball, Locator®, or bar-and-clip style) that sit on top of the implants and provide the snap-fit or screw-retained connection
• Denture prosthesis — a custom-fabricated arch of teeth and gum-colored acrylic that attaches securely to the implants via the connection system

Types of Implant-Supported Dentures

Overdentures (Removable, Implant-Retained)

An overdenture snaps onto 2–4 implants using Locator attachments or a milled bar. The patient removes it nightly for cleaning. Benefits:

• Lower cost than fixed options (fewer implants required)
• Easier hygiene — remove, brush, rinse, reattach
• Can be converted from an existing denture in some cases
• Minimum 2 implants in the lower jaw, 4 recommended in the upper

Fixed Implant-Supported Dentures (Hybrid/All-on-4)

A fixed prosthesis is screwed permanently onto 4–6 implants per arch. Only the dentist removes it (for annual maintenance cleaning). Benefits:

• Maximum stability — no movement whatsoever
• Highest chewing efficiency — up to 90% of natural bite force vs. 20% for conventional dentures
• No palate coverage (upper arch) — full taste sensation returns
• Most natural feel — patients often forget they have a prosthesis

Implant-Supported Dentures vs. Conventional Dentures

The differences are dramatic:

• Retention — Conventional dentures rely on suction and adhesive (lower dentures especially notorious for poor retention). Implant-supported dentures lock into place with 5–20+ pounds of snap force.
• Chewing force — Conventional dentures deliver approximately 20–25% of natural bite force. Implant overdentures restore 50–60%. Fixed hybrids restore 80–90%.
• Bone preservation — Conventional dentures accelerate jawbone resorption (the bone literally shrinks because it's no longer stimulated). Implants maintain bone volume by transmitting chewing forces into the bone, mimicking natural tooth roots.
• Comfort — No sore spots from denture movement. No gagging from upper palate coverage. No food trapped underneath.
• Speech — Conventional dentures can shift during speech, causing lisping or clicking. Implant-supported prosthetics stay locked in place.
• Diet restrictions — With conventional dentures, patients avoid tough meats, raw vegetables, nuts, and crusty bread. Implant-supported patients eat whatever they want.

Who Is a Candidate?

Most patients who can wear conventional dentures are candidates for implant-supported dentures. Key requirements:

• Adequate bone volume for implant placement (or willingness to undergo bone grafting)
• Healthy gum tissue without active infection
• Controlled systemic health conditions (diabetes, hypertension)
• Non-smoker or willing to quit during the healing period
• Commitment to follow-up care and home hygiene

Patients with severe bone loss in the upper jaw may need sinus lifts or zygomatic implants. In the lower jaw, even minimal bone height (as little as 10mm) is often sufficient for two implants to support an overdenture.

The Treatment Process

1. Consultation & imaging — 3D CBCT scan, clinical exam, treatment options review
2. Implant placement surgery — 45–90 minutes under IV sedation. Minimally invasive with small incisions.
3. Healing period — 3–6 months for osseointegration. Patients wear a temporary denture or healing cap during this time.
4. Attachment placement — once healed, abutments/attachments are connected to the implants
5. Final prosthesis delivery — the custom denture is fabricated and fitted for optimal retention, aesthetics, and bite

Longevity & Maintenance

Implants themselves can last a lifetime with proper care. The denture prosthesis typically needs reline or replacement every 7–15 years. Locator attachments (the snap-in nylon caps) wear out every 12–24 months and are replaced chairside in minutes — a minor, inexpensive maintenance item. Annual dental visits for cleaning and attachment checks keep everything in optimal condition.

More on Implant-Supported Dentures – Permanent Dentures