Effect of smokeless tobacco on color stability and surface roughness of CAD/CAM milled, 3D printed, and conventional provisional crown and fixed dental prosthesis materials: An in vitro study

Mohammed E Sayed; Saurabh Jain; Hossam F Jokhadar; Ahid Amer Alshahrani; Saad Saleh AlResayes; Saeed M Alqahtani; Hatem Alqarni; Najwa Ali Anab; Nouf H Alsubeaie; Shaa H Alsubaie; Asaad Khalid; Rocco Franco; Giuseppe Minervini

doi:10.3233/THC-230723

Effect of smokeless tobacco on color stability and surface roughness of CAD/CAM milled, 3D printed, and conventional provisional crown and fixed dental prosthesis materials: An in vitro study

Technol Health Care. 2023 Sep 4. doi: 10.3233/THC-230723. Online ahead of print.

Authors

Affiliations

¹ Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia.
² Department of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia.
³ Department of Dental Technology, Applied Medical Science, King Khalid University, Abha, Saudi Arabia.
⁴ Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
⁵ Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Saudi Arabia.
⁶ Restorative and Prosthetic Dental Science Department, College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia.
⁷ King Abdullah International Medical Research Center, Riyadh, Saudi Arabia.
⁸ Resident Services in OMFS, Mohmmad Bin Nasser Hospital (MOH), Jazan, Saudi Arabia.
⁹ Private Practice, Riyadh, Saudi Arabia.
¹⁰ Substance Abuse and Toxicology Research Center, Jazan University, Jazan, Saudi Arabia.
¹¹ Medicinal and Aromatic Plants and Traditional Medicine Research Institute, National Center for Research, Khartoum, Sudan.

PMID: 37694329
DOI: 10.3233/THC-230723

Abstract

Background: Provisional fixed dental prosthesis (FDP) plays an important role during fixed prosthodontic therapy till the definitive. Discoloration of materials used for provisional FDPs can cause patient dissatisfaction and may create doubt about the color stability of the definitive FDP. Surface roughness is the other major property to be taken into consideration for provisional FDP materials. Smokeless tobacco is reported to affect the color stability and surface roughness of different prosthetic materials.

Objective: The aim of the current study was to evaluate the effect of two types of smokeless tobacco (black and white) on color stability and surface roughness of 3D printed, CAD/CAM milled, and conventional provisional FDP resin materials.

Methods: A total of 144 disc-shaped specimens were fabricated using four techniques CAD/CAM subtractive technique (milling), CAD/CAM additive technique (3D Printing), and conventional technique using autopolymerized PMMA, and autopolymerized Bis-acrylic resins. Each group was subdivided into three subgroups of twelve specimens each, and were submerged into three solutions (artificial salivary substitute, black smokeless tobacco, white smokeless tobacco). The change in color and surface roughness was evaluated and the data collected were statistically analyzed.

Results: It was observed that black smokeless tobacco caused the maximum color change and the effect was highest in autopolymerized PMMA resin specimens (ΔE = 9.343 ± 0.489), followed by 3D printed (ΔE = 7.187 ± 0.391), autopolymerized Bis-acryl (ΔE = 6.464 ± 0.453) and milled (ΔE = 4.978 ± 0.227). White smokeless tobacco was found to cause a maximum change in surface roughness and the effect was highest in autopolymerized Bis-acryl specimens (ΔRa = 0.321 ± 0.015 μm), followed by autopolymerized PMMA (ΔRa = 0.297± 0.015 μm), 3D printed (ΔRa = 0.191 ± 0.019 μm), and milled (ΔRa = 0.168 ± 0.014 μm). Statistically significant (p-value < 0.05) differences were observed among all techniques and solutions.

Conclusions: The change in color and surface roughness were maximum in the case of FDPs prepared using autopolymerizing resins, followed by 3D printed, and CAD/CAM milled reins.

Keywords: CAD/CAM Milling; PMMA; 3D printing; Provisional fixed dental prosthesis; Smokeless Tobacco; color stability; surface roughness.