Mechanical stability of alveolar bone fixation screws: An in vitro study
Description
This dataset contains raw insertion torque (IT), implant stability quotient (ISQ), and pullout strength (POS) measurements from an in vitro mechanical study of five alveolar bone fixation screws (S1-S5). Screws were tested in solid rigid polyurethane foam blocks (20, 30, and 50 PCF densities) simulating the recipient bone site, and in a 50 PCF foam sheet simulating block graft fixation. Testing followed ASTM F543 and ASTM F1839-08 standards. Data support the research article "Mechanical stability of alveolar bone fixation screws: An in vitro study" submitted to the Journal of the Mechanical Behavior of Biomedical Materials.
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Steps to reproduce
1. Materials Preparation: Five distinct groups of alveolar bone fixation screws (S1-S5) and solid rigid polyurethane foams (Sawbones) were utilized. The artificial bone models included blocks with densities of 20, 30, and 50 PCF, and a 3-mm-thick sheet with a density of 50 PCF. 2. Apical Stability Testing (Recipient site simulation): Insertion Torque (IT): Screws were inserted into the 20, 30, and 50 PCF foam blocks to a 3-mm depth using a linear-torsion dynamic testing machine (ElectroPuls E10000, Instron) according to ASTM F543 standards. The insertion was controlled at a constant rotational speed of 3 rpm with an 8 N axial load. The dynamic IT was recorded in Ncm. Resonance Frequency Analysis (RFA): A modified SmartPeg was bonded to the screw head using light-curing resin. The Implant Stability Quotient (ISQ) was measured perpendicularly using a Mega ISQ II analyzer. Pullout Strength (POS): An axial tensile load was applied to the inserted screws at a constant displacement rate of 5 mm/min using the Instron machine until mechanical failure occurred. Maximum load was recorded in Newtons (N). 3. Coronal Stability Testing (Block graft simulation): Screws were inserted into the 50 PCF 3-mm foam sheets through pre-drilled pilot holes (0.2 mm smaller than the screw's external diameter). IT and ISQ were measured using the exact same parameters (3 rpm, 8 N axial load) upon the screw head contacting the sheet. For the POS test in this model, the fully inserted screws were reversed one revolution to accommodate the pulling jig before applying the tensile load at 5 mm/min. 4. Data Collection: The raw numerical data for IT, ISQ, and POS were exported and compiled into spreadsheets for statistical analysis.
Institutions
- Chiang Mai UniversityChiang Mai, Chiang Mai