Comparative Evaluation of Primary Stability between Different Diameters Multi-Scale Roughness Dental Implant by Solid Rigid Polyurethane Simulation

Margherita Tumedei,Morena Petrini,Adriano Piattelli,Giovanna Iezzi,Mariastella Di Carmine,Antonio Cucurullo,Alessandro Cipollina

doi:10.3390/osteology1010006

Margherita Tumedei, Morena Petrini + Show 5 more

Open Access

https://doi.org/10.3390/osteology1010006

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Abstract

Background: Implant primary stability is determined by screw characteristics and surgical procedure. The aim of the present study was to evaluate, on a polyurethane model, the insertion torque (IT), removal torque (RT), and resonance frequency analysis (RFA) of multi-scale roughness dental implants of different diameters. Methods: Two implant sizes were tested on two polyurethane blocks (20 pounds per cubic foot (PCF) and 30 PCF): 3.0 diameter and 13 mm length and 5.0 diameter and 13 mm length. The IT, RT, and RFA were assessed. Results: A significant difference of IT and RT was present in favor of wider implants at both polyurethane densities. No statistical difference was present between the 5.0 diameter and 3.0 diameter implants at both polyurethane densities. A statistically increased RFA was reported for 5.0 implant 30 PCF polyurethane blocks. Conclusions: Multi-scale roughness dental implants of both diameters showed high insertion torque and primary stability on polyurethane blocks, which is valuable for implant loading protocols.

Highlights

Primary stability is the main clinical condition for the early and long-term success of dental implant osteointegration [1,2]
Multi-scale roughness dental implants of both diameters showed high insertion torque and primary stability on polyurethane blocks, which is valuable for implant loading protocols
The 3.0 IC implant showed a mean insertion torque (IT) in 20 per cubic foot (PCF) and 30 PCF cases of 25.80 ± 0.8367 Ncm and 49.40 ± 2.702 Ncm, showed a mean IT in 20 PCF and 30 PCF cases of 25.80 ± 0.8367 Ncm and 49.40 ± 2.702 Ncm, respectively respectively (p < 0.05)

Summary

Introduction

Primary stability is the main clinical condition for the early and long-term success of dental implant osteointegration [1,2]. Dental implant primary stability is defined as the mechanical friction determined by the surface contact of a clinically stable screw with the osteotomy wall during its positioning [4,5,6,7]. It has been reported that stress and strain on stable dental implants are able to induce cortical bone modification, bone–implant contact, and density increase around the screw interface [14,15]. No statistical difference was present between the 5.0 diameter and 3.0 diameter implants at both polyurethane densities

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