Effects of Rigid and Nonrigid Connections between the Miniscrew and Anchorage Tooth on Dynamics, Efficacy, and Adverse Effects of Maxillary Second Molar Protraction: A Finite Element Analysis

Table 2

Simulation results.

Property	Scope	Model 1			Model 2			Model 3
		Minimum	Maximum	Average	Minimum	Maximum	Average	Minimum	Maximum	Average
Von Mises stress (Pa)	All bodies	0.034133	96851000	131320	0.19869	51224000	171090	0.19947	46540000	265410
	Miniscrew	84.003	10916000	1813800	136130	32146000	2090200	3188.4	20948000	314710
	MC				36528	33983000	2702400	2129.3	39577000	1191800
	CB	1.3817	214350	8259.4	7.7935	129060	8715.1	6.921	107600	7201.3
Hydrostatic stress (Pa) of PDL	All teeth	-18550	19086	41.912	-22380	20448	-41.21	-21616	19891	-41.715
	Molar	-18550	19086	256.85	-22380	20448	430.59	-21616	19891	615.05
	Bicuspid	-1593.4	3491.4	-139.38	-8594.6	7366	-1064.7	-14919	12599	-2008.1
Displacement-Y (μm)	All bodies	-29.86	7.8788	-0.27785	-22.776	9.2276	-0.16363	-23.173	12.898	0.58086
	All teeth	-15.046	7.8788	-0.76672	-18.853	9.2276	-0.46188	-18.982	9.5846	-0.35065
	Molar	-15.046	7.8788	-4.5531	-18.853	9.2276	-5.6413	-18.982	9.5846	-5.5237
	Bicuspid	-0.047037	0.93044	0.41375	0.023664	5.7812	3.0526	-0.14605	9.1463	4.7655
Displacement-X (μm)	Molar	-8.0563	10.925	0.85247	-7.2972	11.676	0.76299	-7.0894	12.648	1.2485
	Bicuspid	-0.071982	1.1741	0.54464	0.53623	5.4207	2.5706	0.68342	8.6448	3.8454
Displacement-Z (μm)	Molar	-1.7501	1.3832	-0.19644	-3.1339	2.3739	-0.86759	-3.0095	2.1798	-0.81859
	Bicuspid	-0.47873	0.13339	-0.12516	-0.30058	1.8392	0.93506	-0.19574	3.1345	1.6291