Effect of filament types and loops number on the force degradation of elastomeric chains used for orthodontic treatment: an in-vitro study

Table 2 Percentage of force degradation (%) in each group at different time points

Experimental groups	4 h	24 h	7 days	14 days	21 days	28 days
A₁B₁	25.7 ± 2.9	31.7 ± 6.1	34.3 ± 5.8	37.3 ± 4.6	39.7 ± 6.6	42.5 ± 7.3
A₁B₂	24.4 ± 2.7	26.5 ± 2.8	27.7 ± 6.0	29.2 ± 4.3	30.1 ± 6.5	32.2 ± 7.4
A₁B₃	23.7 ± 2.7	26.0 ± 2.9	27.1 ± 6.1	28.3 ± 4.4	29.1 ± 6.6	30.7 ± 7.0
A₂B₁	28.6 ± 2.5	33.8 ± 4.0	37.5 ± 6.0	38.7 ± 3.3	41.8 ± 7.1	45.4 ± 4.3
A₂B₂	23.2 ± 3.4	32.2 ± 4.8	34.2 ± 4.7	34.7 ± 5.6	35.1 ± 6.4	35.4 ± 5.2
A₂B₃	20.9 ± 3.8	30.1 ± 5.1	33.3 ± 5.1	33.5 ± 6.0	34.2 ± 6.9	34.6 ± 5.7
A₃B₁	31.2 ± 1.9	40.4 ± 5.9	44.9 ± 8.3	48.9 ± 6.6	51.9 ± 4.9	55.3 ± 9.5
A₃B₂	23.7 ± 2.7	34.6 ± 5.7	39.5 ± 5.7	43.4 ± 4.7	46.8 ± 7.0	49.7 ± 7.8
A₃B₃	20.2 ± 3.0	29.8 ± 6.0	34.7 ± 5.9	38.6 ± 4.8	41.8 ± 7.1	44.4 ± 8.0

Values are expressed as mean ± SD. A1, A2, and A3 are the groups of close, medium, and long elastomeric chains, respectively. B1, B2, and B3 represent elastomeric chains of four, five, and six loops, respectively

ISSN: 1472-6831