Dr. Rubin asks:
There seems to be some danger of narrow pure titanium dental implants fracturing.
I thought that all dental implants today were alloy but when I called a few
companies to check, I found out that there are still many pure titanium
dental implants on the market even though the alloy implants are stronger.
Have you seen any pure titanium narrow implants fracture? Have you seen
alloy narrow implants fracture? Thanks.
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Actually NO in both counts
You must be careful when you torque the implant. The pure titanium implants less stronger than alloy implants . No matter what type of implant you must know the thinner the implant the more chance of fracture you have. I’ve seen it fracture mini dental implants when you use hand torque wrench but this may happen with conventional implants too. Be careful
yes two of my mini imlants fractured whilst i was placing them in the mandible
A fractured implant top cannot be recovered from and should be avoided by knowing the strength of the implants you are using compared to other commercially available implants. A number of postings on this line documented fractures with the 3.5mmD Nobel Replace Implant. The reason for these fractures with Nobel’s 3.5mmD Replace implants is that the walls are only .009″ thick at its weakest point which is 0.262mm or about the thickness of two human hairs. In addition, because TiUnite cannot bond to alloy, Nobel must use the weaker CP titanium while using Alloy for the same implant with a HA surface.
Putting other factors aside can we be more at risk for implant fracture using a non segmented abutment which has an integrated screw, one piece abutment and screw? Is the frictional fit adequate to prevent anti-rotational motion? Does having a segmented attachment to the abutment implant connection provide a positive benefit for some energy loss dissapation?? anyone?
PS: I see the multivariate situation please just look at the one varriable. Assume that the abutment is tightend down to rated torque value.
Segmented prosthetic devices will certainly dissipate occlusal forces. For many implant systems, this occurs because of micromotion of the components. If you are using a CP implant, you WILL distort either the occusal table and threaded portions of the internal aspect of the implant. This is why when components loosen on CP, the rate of loosening over time contunues to increase as the sloppy fit gets worse. Ti Alloy implants are less ductile, have higher compressive strength, and can withstand higher torque values when placing your prosthetic parts. If you are using small diameter CP implants with a firm prosthetic table (little or no micromotion as in one-piece implants, then READ the blogs and the literature. The fracture rate of CP is unacceptable.
Any suggestions for a system that has a good internal connection Narrow Neck Implant where these fractures have not occured?