A critical evaluation of physical and manufacturing properties of genuine and counterfeit rotary nickel-titanium endodontic instruments.
Cyclic fatigue
fake
fracture
quality control
risk
Journal
Australian dental journal
ISSN: 1834-7819
Titre abrégé: Aust Dent J
Pays: Australia
ID NLM: 0370612
Informations de publication
Date de publication:
09 2023
09 2023
Historique:
accepted:
31
05
2023
medline:
25
8
2023
pubmed:
20
6
2023
entrez:
20
6
2023
Statut:
ppublish
Résumé
Rotary nickel-titanium (NiTi) instruments are made to exacting standards and are costly to manufacture, and quality control is paramount. Consequently, unauthorized factories make counterfeit instruments that are less expensive and may therefore be attractive to dentists. Little information exists about the metallurgy and manufacturing quality of such instruments. There is the potential for counterfeit instruments to be at higher risk of fracture during treatment, thereby compromising clinical outcomes. The aim of this study was to evaluate physical and manufacturing properties of genuine and counterfeit ProTaper Next™ and Mtwo® rotary NiTi instruments. This study investigated the metallurgical properties, manufacturing quality, microhardness and number of cycles to failure of two commonly used rotary NiTi systems and compared them with counterfeit products purporting to be genuine articles. Counterfeit instruments were found to be inferior in manufacturing standards and were less resistant to cyclic fatigue when compared to genuine instruments. Counterfeit rotary NiTi instruments may be less efficient at preparing root canals and may be at higher risk of fracture during endodontic treatment. Dentists must be aware that, although less expensive, counterfeit instruments may be of dubious manufacturing quality and at higher risk of fracture if used in patients. © 2023 Australian Dental Association.
Sections du résumé
BACKGROUND
Rotary nickel-titanium (NiTi) instruments are made to exacting standards and are costly to manufacture, and quality control is paramount. Consequently, unauthorized factories make counterfeit instruments that are less expensive and may therefore be attractive to dentists. Little information exists about the metallurgy and manufacturing quality of such instruments. There is the potential for counterfeit instruments to be at higher risk of fracture during treatment, thereby compromising clinical outcomes. The aim of this study was to evaluate physical and manufacturing properties of genuine and counterfeit ProTaper Next™ and Mtwo® rotary NiTi instruments.
METHODS
This study investigated the metallurgical properties, manufacturing quality, microhardness and number of cycles to failure of two commonly used rotary NiTi systems and compared them with counterfeit products purporting to be genuine articles.
RESULTS
Counterfeit instruments were found to be inferior in manufacturing standards and were less resistant to cyclic fatigue when compared to genuine instruments.
CONCLUSIONS
Counterfeit rotary NiTi instruments may be less efficient at preparing root canals and may be at higher risk of fracture during endodontic treatment. Dentists must be aware that, although less expensive, counterfeit instruments may be of dubious manufacturing quality and at higher risk of fracture if used in patients. © 2023 Australian Dental Association.
Substances chimiques
Dental Alloys
0
titanium nickelide
12035-60-8
Nickel
7OV03QG267
Titanium
D1JT611TNE
nitinol
2EWL73IJ7F
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
179-185Subventions
Organisme : Australian Society of Endodontology Inc
Organisme : Melbourne Dental School
Informations de copyright
© 2023 The Authors. Australian Dental Journal published by John Wiley & Sons Australia, Ltd on behalf of Australian Dental Association.
Références
Young GR, Parashos P, Messer HH. The principles of techniques for cleaning root canals. Aust Dent J 2007;52:S52-S63.
Baumann MA. Nickel-titanium: options and challenges. Dent Clin North Am 2004;48:55-67.
Walia H, Brantley WA, Gerstein H. An initial investigation of the bending and torsional properties of Nitinol root canal files. J Endod 1988;14:346-351.
Esposito PT, Cunningham CJ. A comparison of canal preparation with nickel-titanium and stainless steel instruments. J Endod 1995;21:173-176.
Yoshimine Y, Ono M, Akamine A. The shaping effects of three nickel-titanium rotary instruments in simulated S-shaped canals. J Endod 2005;31:373-375.
Kuhn G, Tavernier B, Jordan L. Influence of structure on nickel-titanium endodontic instruments failure. J Endod 2001;27:516-520.
Di Fiore PM, Genov KA, Komaroff E, Li Y, Lin L. Nickel-titanium rotary instrument fracture: a clinical practice assessment. Int Endod J 2006;39:700-708.
Ruddle CJ, Machtou P, West JD. The shaping movement: fifth-generation technology. Dent Today 2013;32(94):96-99.
Arias A, Peters OA. Present status and future directions: canal shaping. Int Endod J 2022;55(Suppl 3):637-655.
Ertas H, Capar ID, Arslan H, Akan E. Comparison of cyclic fatigue resistance of original and counterfeit rotary instruments. Biomed Eng Online 2014;13(1):67.
Rodrigues CS, Vieira VT, Antunes HS, et al. Mechanical characteristics of counterfeit Reciproc instruments: a call for attention. Int Endod J 2018;51:556-563.
Pedullà E, Savio FL, Boninelli S, et al. Torsional and cyclic fatigue resistance of a new nickel-titanium instrument manufactured by electrical discharge machining. J Endod 2016;42:156-159.
Ullmann CJ, Peters OA. Effect of cyclic fatigue on static fracture loads in ProTaper nickel-titanium rotary instruments. J Endod 2005;31:183-186.
Parashos P, Gordon I, Messer HH. Factors influencing defects of rotary nickel-titanium endodontic instruments after clinical use. J Endod 2004;30:722-725.
Shen Y, Zhou H, Campbell L, et al. Fatigue and nanomechanical properties of K3 XF nickel-titanium instruments. Int Endod J 2014;47:1160-1167.
Gambarini G, Grande NM, Plotino G, et al. Fatigue resistance of engine-driven rotary nickel-titanium instruments produced by new manufacturing methods. J Endod 2008;34:1003-1005.
Plotino G, Grande NM, Sorci E, Malagnino VA, Somma F. A comparison of cyclic fatigue between used and new Mtwo Ni-Ti rotary instruments. Int Endod J 2006;39:716-723.
Azarpazhooh A, Fillery ED. Prion disease: the implications for dentistry. J Endod 2008;34:1158-1166.
Eggert C, Peters O, Barbakow F. Wear of nickel-titanium lightspeed instruments evaluated by scanning electron microscopy. J Endod 1999;25:494-497.
Elnaghy AM, Elsaka SE. Mechanical properties of ProTaper Gold nickel-titanium rotary instruments. Int Endod J 2016;49:1073-1078.
Pereira ES, Gomes RO, Leroy AM, et al. Mechanical behavior of M-Wire and conventional NiTi wire used to manufacture rotary endodontic instruments. Dent Mater 2013;29:e318-e324.