It’s the question almost nobody asks before a full rehabilitation. And it’s the one that prevents the most problems later. Let me explain why it matters. When the prosthesis is screw-retained and you tell me “doctor, something feels odd,” I unscrew it in ten minutes, check what’s happening and put it back. Like changing a tire on a car. When it’s cemented, no. To check it, we have to cut it off, lose it, and remake it from scratch. It’s as if they handed you a new car with the wheels welded to the hub. In 38 years I’ve learned that in implantology you don’t design for delivery day. You design for year eight, when something needs adjusting. That’s why in my practice we do everything screw-retained, or we try to right up to the last resort.
What each one means
Your prosthesis doesn’t rest directly on the implant. Between the two there’s an intermediate piece, the abutment. The difference lies in how the crown or bridge is joined to that abutment.
Screw-retained. The prosthesis is fixed with a screw that passes through the crown. That screw is covered with a tooth-colored material and isn’t visible. When it needs to be removed, the opening is uncovered, the screw is loosened and it comes out whole.
Cemented. The prosthesis is bonded to the abutment with dental cement, just like a crown on a natural tooth. It looks very good, with no visible opening. But it’s glued. To remove it, it has to be broken. Put that way it sounds like a technical detail between dentists. It isn’t. It’s the difference between a ten-minute check and remaking everything.
Year eight
A well-placed implant can last you decades. The prosthesis on top, not necessarily without interventions. In that time perfectly normal things can happen: a screw that loosens, a ceramic that chips, gums that change level, a bite adjustment. None of that is a failure. It’s the passage of time over something you use every day to chew. The right question isn’t “will it break?” It’s “how easy is it to fix when the time comes?” With a screw-retained prosthesis, the answer is usually: it’s removed, resolved, and put back. With a cemented one, the answer is often: it’s destroyed in order to get in, and made again. With the cost and time that implies.
The cement you can’t see
There’s a second reason, and it’s the one that concerns me most. When a prosthesis is cemented onto implants, some of the cement escapes below the margin and lodges under the gum. There it isn’t visible, isn’t felt, and you don’t know it’s there. But your body does recognize it as a foreign body. Retained cement is documented in the literature as one of the factors associated with inflammation around the implant — peri-implantitis. And peri-implantitis is the leading cause of late implant loss. A natural tooth has a ligament and defenses around it. An implant doesn’t have the same. It forgives less. With a screw-retained prosthesis that risk simply doesn’t exist, because there is no cement.
“Doctor, what about aesthetics?”
It’s the objection that always comes up, and a few years ago it made sense. The classic argument was that the screw opening, if the implant was angled, would exit through the visible face of the tooth. And nobody wants a little dot on the front of their smile. That’s solved today. With angled screw channel abutments, the screw exit can be redirected toward the back of the tooth, even when the implant isn’t perfectly straight. And the opening is sealed with a material that blends into the ceramic. Unless you tell someone, nobody will know your prosthesis is screw-retained.
When I do use cement
I’m not dogmatic. There are cases where implant angulation or available height leave no other option, and then it’s cemented. It’s done well, excess cement is controlled with specific techniques, and it works. But it’s the exception, and it’s a decision made with judgment, not for the lab’s convenience. If a full rehabilitation is going to be cemented for you, you have the right to be told why it couldn’t be screw-retained in your case. “Because that’s how we always do it” is not an answer.
The extreme: when there isn’t even a screw
There’s a category of implants that goes further still. They’re one-piece, monobloc: the implant and the abutment come fused, with no connection between them, and the prosthesis is always cemented on top. There’s nothing to unscrew. Ever. Every correction means cutting the prosthesis off, losing it and making it from scratch. That’s a subject that deserves its own article and I’ll explain it in detail. For now, keep this in mind: if you’re offered a rehabilitation where nothing can be removed, ask what will happen the day something needs checking.
What to ask before accepting
1. Will my prosthesis be screw-retained or cemented? It’s a simple question and you should be able to resolve it during the assessment. 2. If it’s cemented, why couldn’t it be screw-retained in my case? There should be a concrete anatomical reason, and it’s worth having it explained. 3. What happens if it needs checking or adjusting in three years? Ask them to describe it step by step. 4. What implant and abutment brand will you use? You should be able to verify it, and it should still exist in ten years for replacement parts. 5. Will you give me the reference and lot number in writing? It’s your clinical record and it belongs to you.
Closing
Choosing between screw-retained and cemented isn’t choosing between two equally valid approaches. It’s deciding whether your rehabilitation was designed with delivery day in mind, or with the next twenty years in mind. I’ve been doing this for 38 years and treated more than 10,000 patients. If I’ve learned anything, it’s that good work isn’t the kind that never needs checking. It’s the kind that lets itself be checked. If you’re evaluating a full rehabilitation and want to understand what will be placed and why, come in and let’s talk. During the assessment I won’t operate on you or ask you to decide anything that day.
Frequently asked questions
Does a screw-retained prosthesis hurt more? No. The difference is in manufacturing and maintenance, not surgery. The procedure for placing the implant is the same. Is the screw hole visible? No. It’s sealed with a tooth-colored material, and with angled abutments the exit is redirected to the inner surface. Can I switch from cemented to screw-retained? Generally it means making a new prosthesis, because the connection is defined from the design stage. How often should a prosthesis on implants be checked? Every 4 to 6 months, and it’s in those checks that the ability to remove it makes the difference.
