Biomechanical analysis of effective mandibular en-masse retraction using Class II elastics with a clear aligner: a finite element study

Progress in Orthodontics

Table 2 Material properties

Component	Young’s modulus (MPa)	Poisson’s ratio	References
Cancellous bone	1370	0.30	[17, 22]
Cortical bone	1.47 × 10⁴	0.30	[19, 23]
Tooth	1.96 × 10⁴	0.30	[20, 24]
PDL	0.143	0.45	[25]
Attachment	12.5 × 10³	0.36	[26]
Button	2.0 × 10⁵	0.33	[27]
CA	528	0.36	[26, 28–30]