Abstract
Ten years ago, for the first time in humans, thanks to the DLMS (direct metal laser sintering) technique, we designed, built and inserted an immediate post-extraction custom-made root-analogue implant in Ti-6Al-4v with platform switching. The implant was inserted into the post-extraction socket, respecting the biological width. After 10 years, we wanted to evaluate the dimensional stability of the implant and the eventual crestal bone resorption. The evaluation was performed clinically with periodontal parameters and radiographically by means of an intraoral X-ray with the parallel technique measuring the distance between the base of the bone crest and the implant shoulder. It appears that the implant has maintained dimensional stability of the peri-implant soft tissues, and the crestal resorption is 0 mm. This could represent a step forward to make this experimental method a valid alternative to the current immediate post-extraction implant procedures in use.
Highlights
IntroductionImplant rehabilitation is increasingly in demand. Immediate postextraction implants are inserted immediately after the avulsion of dental elements [1]
In the dental field, implant rehabilitation is increasingly in demand
With the Direct laser metal sintering (DLMS) technique, a root analogue implant (RAI) in Ti-6Al-4v [14] was produced from three-dimensional models developed through the 3D processing of radiographic images, obtained through CT, of the future post-extraction alveolus [15]
Summary
Implant rehabilitation is increasingly in demand. Immediate postextraction implants are inserted immediately after the avulsion of dental elements [1]. With the DLMS technique, it is possible to control the porosity of each layer, and pore interconnectivity, size, shape, and distribution, and the 3D architecture of the implant, by changing the processing parameters. This is an important advantage of this technique: a high level of interconnectivity resulting in a predominantly open-pored morphology may allow bone ingrowth and vascularization, enhancing osseointegration, the essential factor of the long-term reliability of an implant [7–9]
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