01 — Dynamic navigation
Real-time navigation for implant placement.
Dynamic navigation tracks the handpiece against the patient’s CBCT while the osteotomy is being prepared. Position, angulation and depth are on screen throughout — and the plan can be revised in the chair, not re-printed in a lab.
What it is
The scan, the plan and the drill in one coordinate system
Dynamic navigation combines three things: a cone beam CT of the patient, a virtual implant plan built from the restorative design, and a stereo camera that tracks fiducial markers on the patient and on the handpiece. Once those share a coordinate system, the software can show exactly where the drill is inside the bone — a live view of a structure the surgeon cannot see.
In practice this is closer to instrument flight than to a template. The surgeon still controls the drill; the system removes the guesswork about where it is pointing and how deep it has gone.
Static vs dynamic
Where a printed guide runs out of options
| Static surgical guide | Dynamic navigation | |
|---|---|---|
| When the plan is fixed | At design and printing, days before surgery | Editable in the operatory, up to and during the procedure |
| Lead time | Design, print, sterilize — a separate appointment for most workflows | Scan and treat in the same visit where clinically appropriate |
| Access and irrigation | Sleeve restricts irrigation and visibility; limited inter-arch space needed | Open field, direct irrigation, no sleeve to work around |
| Posterior and limited-opening cases | Often impossible — the guide plus handpiece will not fit | Feasible; nothing sits between drill and bone |
| Intraoperative feedback | None. The guide either fits the anatomy or it does not | Continuous. Deviation from plan is visible as it happens |
| Verification | Radiograph after placement | Position confirmed against the plan before closing |
Comparative studies of static and dynamic systems report deviations in a broadly similar range; the practical difference is what each approach lets you do when the case does not match the plan.
The workflow
Four stages, one plan
Interdisciplinary reading
CBCT, intraoral scan and the restorative design are assessed together with the referring clinician before an implant position is proposed.
Prosthetically driven
The virtual guide is built backwards from the intended prosthesis, not forwards from available bone.
Tracked osteotomy
Entry point, axis and depth are followed live. Sinus, nerve and adjacent roots stay on screen.
Checked before closing
Achieved position is compared to the plan and, where relevant, captured for the prosthetic team.
Where it changes the outcome
Cases that reward navigation
- Zygomatic and pterygoid implants — long trajectories through anatomy that cannot be re-drilled.
- Full-arch rehabilitation — angulation and inter-implant spread controlled against the prosthetic plan.
- Limited mouth opening — posterior sites where a guide plus handpiece will not fit.
- Proximity to the inferior alveolar nerve or maxillary sinus — depth monitored continuously.
- Failed or misplaced implants — retrieval and reposition planned around existing hardware.
- Single-visit treatment — scanning and placing in one appointment where the case allows.
Beyond the osteotomy
Dynamic photogrammetry
Once implants are placed, the same tracking principle can capture their exact spatial relationship for the prosthetic team — without an impression, and without the distortion that comes with splinted pick-ups across a full arch. It is the step that makes same-day full-arch delivery dependable rather than optimistic, and it has a chapter of its own in the book.
Common questions
Dynamic navigation, answered
Is navigated implant surgery more accurate than freehand placement?
The published comparisons consistently favor computer-assisted placement over freehand for angular and depth deviation. The larger clinical difference is consistency: navigation narrows the spread between an easy case and a difficult one.
Does it take longer than using a surgical guide?
Chair time is comparable once a team is trained. What disappears is the lead time — there is no guide to design, print, ship and sterilize before the patient can be treated.
Is extra radiation involved?
No more than for a guided case. Navigation uses the same cone beam CT that any digital implant plan requires. A tracker is fitted at the time of the scan.
Can navigation be used for zygomatic implants?
Yes, and it is one of the strongest indications. A zygomatic trajectory passes close to the orbit and the infratemporal fossa over a long span, where a small angular error at entry becomes a large error at the apex.
What happens if the anatomy differs from the scan?
The plan is revised on screen and the surgery continues. This is the central argument for navigation over a printed guide, and the reason for the book’s title.
Which navigation system do you use?
X-Guide dynamic 3D navigation. Dr Nicolaievsky and Dr Jeffrey Blum were the first oral surgeons in South Florida to adopt it.
Get in touch
Referral, second opinion, lecture, or a question about the book
Messages reach Dr Nicolaievsky’s office directly. Complex and previously failed cases are welcome.