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Narrow diameter titanium dental implants fracture resistance after implantoplasty
Osvaldas Mickevičius, Artūras Pauliukevičius
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Stomatologija 2025; 27 (1): 3-8 277 KB

Narrow diameter titanium dental implants fracture resistance after implantoplasty

Osvaldas Mickevičius*, Artūras Pauliukevičius*

Summary

Background. There is a lack of evidence of possible implant fracture after implantoplasty due to decreased implant diameter.

Purpose. To compare narrow diameter titanium dental implants fracture resistance after implantoplasty performed by computer numerical control (CNC) lathe machine which helped to standardize study setting.

Materials and methods. Twelve (n=12) narrow diameter (3.6×11.0 mm) endosteal screw-shaped bone-level dental implants with an internal connection which are made from grade IV titanium were randomly divided into 2 groups containing six (n=6) implants each. The test group was exposed to implantoplasty using a computer numerical control (CNC) lathe-turning machine. Implantoplasty was performed removing 5.5 mm of implant threads from the implant coronal part downwards towards the apical part, which resulted in a 0.2 mm coronal diameter reduction. Implants from both groups were positioned on metal pipes using three-dimensional (3D) printed guides. The space inside the pipe was filled with epoxy resin. Every sample had an individually 3D-printed chrome-cobalt (Cr-Co) alloy crown, which distributed forces during the test. Implants were compressed in a universal testing machine. Statistical analysis was performed using IBM SPSS 29.0 software.

Results. Performing implantoplasty with CNC lathe-turning machine was a success, which helped to standardize study settings. The control group showed average resistance to a maximum compressive force of 443.76 N, while the test group showed average resistance to a maximum compressive force of 409.42 N. No statistical significance was found between groups on the compressive force aspect.

Conclusion. This in vitro study shows that implantoplasty does not have a significant effect on decreasing fracture resistance of narrow diameter titanium dental implants.

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*Faculty of Odontology, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania

Address correspo ndence to Osvaldas Mickevičius, Faculty of Odontology, Medical Academy, Lithuanian University of Health Sciences, Eivenių g. 2, LT-50161, Kaunas, Lithuania.

E-mail address: osvamick0813@kmu.lt