A shifting sensation when chewing on a dental implant usually points to a mechanical issue, not a failing implant. The most common causes are a loosening abutment screw, a crown that has come slightly loose from its abutment, or a bite contact that is too high. All three are typically fixable in a single visit.

That is the reassuring part. The unsettling part is that most patients cannot tell whether the tiny movement they feel is coming from the crown on top or the titanium post buried in bone. At Inspire Dental in Tigard, we hear this concern often from patients who have had their implants for a year or more and suddenly notice something feels different. Usually the fix is small. Sometimes it takes ten minutes.

What does "shifting" actually mean when you bite down?

Patients describe it in different ways. A tiny rocking. A micro-slip when the teeth meet. A feeling that the tooth resettles after each bite. What matters is whether the movement is in the crown, in the connection between the crown and the implant, or in the fixture itself.

Here is the key distinction. The titanium implant fixture sits fused to your jawbone through a process called osseointegration. When that bond is healthy, the fixture does not move at all. But the crown and abutment on top? Those are mechanical parts held together with a small screw and sometimes cement. Mechanical parts can loosen. Bone-fused metal usually does not.

So the shifting you feel is almost always happening above the gumline, not below it.

Could it be a loose abutment screw?

This is the most common answer. According to peer-reviewed research in journals like the Journal of Prosthetic Dentistry and Clinical Oral Implants Research, abutment screw loosening is one of the most frequently reported mechanical complications of single-tooth implants.

The abutment screw is the small screw that connects your crown to the implant fixture underneath. Over years of chewing, that screw can back out slightly. When it does, the crown gets a tiny bit of play. You feel it as a shift.

Typical signs point to this cause:

• Movement that comes and goes, worse at the end of the day

• A faint clicking or tapping sensation when you chew

• No swelling, no bleeding, no pain

• The area looks completely normal in the mirror

The fix is straightforward. We remove the crown, retorque or replace the screw to the manufacturer's spec, and reseat everything. Most patients walk out in under an hour. No numbing needed in many cases.

Is the crown itself the problem?

Sometimes the screw is fine but the crown has separated from the abutment. Cement-retained crowns can lose their bond over time, especially if the cement layer was thin to begin with. A crown that has come loose from its abutment can rock a hair under load without falling off.

Other crown-side culprits include a chipped or worn ceramic surface, a contour that lets food wedge underneath and lift the crown slightly during chewing, or a hairline crack that changes how forces distribute. None of these mean the implant itself is in trouble.

We usually spot the issue with a careful clinical exam and a bitewing radiograph. If the crown needs to be re-cemented or remade, that decision happens the same visit.

How does your bite affect the sensation?

Here is something patients rarely know. Natural teeth sit in a tiny hammock of fibers called the periodontal ligament. That ligament gives every real tooth a fraction of a millimeter of give. Implants have no such ligament. They are locked into bone.

What that means in practice: if the crown on your implant is even slightly too tall, you feel it immediately, and the surrounding natural teeth compensate by shifting. Over time, that mismatch can create a rocking sensation because your bite is essentially landing on the implant first, then everything else.

Bruxism amplifies it. Patients who clench or grind, common among King City retirees and Bull Mountain professionals working long hours from home, can wear the opposing tooth or the crown itself down enough to change how forces meet. An occlusal adjustment, sometimes called equilibration, resolves it in one visit for a lot of these cases.

Simple as that.

When shifting means something more serious

Rarely, the fixture itself is the problem. True mobility of the implant post means osseointegration has failed, and that requires urgent evaluation. According to the American Academy of Periodontology, peri-implantitis, an inflammatory condition with progressive bone loss around an implant, is one path to this outcome.

Warning signs that point to something beyond a mechanical issue:

• Persistent pain or tenderness, not just a strange sensation

• Swelling or redness in the gum around the implant

• Bleeding when you brush or floss the area

• Visible gum recession exposing the metal collar

• A bad taste or discharge

• Movement you can see, not just feel

If any of these show up, do not wait. Early intervention preserves bone. Delay costs bone. At that point we may need imaging beyond a standard radiograph to assess what is happening below the gumline.

What to expect at your evaluation appointment

When a patient calls us describing a shifting implant, we typically schedule a focused visit within a day or two. The exam is methodical:

• A clinical mobility test with two instrument handles to isolate whether motion is in the crown or the fixture

• A percussion test, gently tapping the crown to listen for the dull sound of a loose component versus the crisp sound of a well-integrated implant

• A periapical radiograph to check bone levels and the seating of the abutment

• A torque check on the abutment screw

• Occlusal analysis with articulating paper to map exactly where your bite is landing

For patients driving in from Summerfield, King City, or down the Pacific Highway corridor from Tualatin, we make room for same-day fixes on most mechanical issues. A retorqued screw, a re-cemented crown, or a bite adjustment rarely requires a follow-up.

Mechanical parts can loosen. Bone-fused metal usually does not. That is why most "shifting" sensations are fixable in a single short visit.

An 68-year-old patient from the Summerfield neighborhood came in last month describing exactly this. He noticed his lower molar implant felt like it was "floating a little" when he ate almonds. Twenty minutes later we had retorqued the abutment screw, checked his bite with articulating paper, adjusted one high spot on the opposing tooth, and sent him home. No new implant. No surgery. No drama.

That is the most common story we see.

Frequently Asked Questions

Is a shifting feeling in my implant an emergency?

Usually not, but it should be evaluated within a week or two. If the shifting is accompanied by pain, swelling, bleeding, or a bad taste, call us the same day. A quiet mechanical shift without other symptoms is not urgent, but ignoring it can let a loose screw damage the internal threads of the implant, which turns a simple fix into a bigger repair.

Can a loose implant crown be fixed the same day?

In most cases, yes. If the abutment screw has loosened or the cement bond has failed, we can typically remove the crown, address the underlying issue, and reseat it in one appointment. Same-day repair is one of the reasons patients from Bull Mountain and King City choose us for implant follow-up care.

How long does it take to tighten an abutment screw?

The actual retorquing takes only a few minutes. The full appointment, including exam, radiograph, and reseating the crown, usually runs 30 to 60 minutes. Most patients do not need anesthesia for this procedure.

Will I need a new implant if the fixture is loose?

If the fixture itself has truly lost its bond with bone, yes, the implant typically needs to be removed and the site allowed to heal before placing a new one. But true fixture mobility is uncommon compared to crown or screw issues. We confirm which is which before recommending anything major.

Can grinding my teeth cause my implant to feel like it moves?

Yes. Bruxism puts extra force on implants, and because implants lack the natural cushioning of a periodontal ligament, they feel that force sharply. Over time, grinding can loosen screws, wear down crowns, and create a rocking sensation. A nightguard often solves this and protects your investment for the long haul.

If your implant feels off, do not guess. Call Inspire Dental in Tigard at (503) 639-4330 and we will get you in for a focused evaluation. Most fixes are quick, most concerns turn out to be small, and peace of mind is worth the visit.