## 4 Discussion
\begin{table}
\begin{tabular}{l c c c c c c c c c c} \hline \hline
**Resorption (mm)** & & **0** & **1** & **2** & **3** & **4** & **5** & **6** & **7** & **8** \\ \hline
**PDL Stress** & **PDL** & a & 4.03 & 5.15 & 6.26 & 7.38 & 8.49 & 10.13 & 11.75 & 13.39 & 15.02 \\
**Exceeding** & & **m** & 7.95 & 10.18 & 12.40 & 14.63 & 16.85 & 20.19 & 23.53 & 26.86 & 30.20 \\ \cline{2-11}
**MHP** & & **c** & **35.43** & **47.52** & **59.60** & **71.69** & **83.77** & **96.58** & **109.39** & **127.19** & **135.40** \\ \cline{2-11}
2.4 N / 240 gf & Structure & & 2017.60 & 2020.40 & 2023.20 & 2026.00 & 2029.20 & 2330.68 & 2632.00 & 2933.60 & 3235.20 \\  & Dentine & a & 271.76 & 314.67 & 357.58 & 400.49 & 443.39 & 834.01 & 1224.62 & 1615.23 & 2005.84 \\  & & m & 271.76 & 642.13 & 1012.50 & 1382.87 & 1753.25 & 2066.28 & 2379.32 & 2629.36 & 3005.39 \\  & & c & 800.43 & 1001.51 & 1202.58 & 1403.65 & 1604.72 & 1767.50 & 1930.28 & 2093.06 & 2255.86 \\  & & C & 271.76 & 278.20 & 284.64 & 291.08 & 297.52 & 349.78 & 402.04 & 454.30 & 506.56 \\ \hline
**PDL Stress** & **PDL** & **a** & 8.05 & 10.29 & 12.52 & 14.75 & 16.98 & **20.26** & **23.50** & **26.78** & **30.05** \\
**Exceeding** & & **m** & 15.90 & **20.35** & **24.80** & **29.25** & **33.70** & **40.38** & **47.05** & **53.73** & **60.40** \\
**MHP** & & **c** & 70.86** & **95.03** & **119.20** & **143.37** & **167.54** & **193.16** & **218.77** & **244.39** & **270.80** \\ \hline Tipping & Structure & & 732.20 & 760.80 & 789.60 & 818.30 & 847.00 & 907.20 & 967.60 & 1027.80 & 1088.20 \\
1.2 N / 120 gf & Dentine & a & 120.03 & 178.00 & 236.00 & 294.00 & 352.00 & 457.00 & 562.00 & 667.00 & 772.00 \\  & & m & 120.03 & 199.85 & 279.67 & 359.50 & 439.33 & 560.95 & 682.58 & 804.21 & 925.83 \\  & & c & 237.21 & 309.52 & 381.82 & 454.12 & 526.42 & 587.82 & 649.21 & 710.61 & 772.00 \\  & & C & 120.03 & 123.52 & 127.02 & 130.52 & 134.02 & 139.71 & 145.39 & 151.08 & 156.77 \\ \hline
**PDL Stress** & **PDL** & a & 3.10 & 4.72 & 6.32 & 7.92 & 9.56 & 11.30 & 13.04 & 14.78 & **16.53** \\
**Exceeding** & & **m** & 6.12 & 8.15 & 10.17 & 12.20 & 14.22 & 16.84 & 19.45 & 22.07 & **24.68** \\
**MHP** & & **c** & **24.26** & **31.09** & **37.92** & **44.75** & **51.58** & **61.14** & 70.70 & 80.26 & 89.82 \\ \hline
2.4 N / 240 gf & Structure & & 1464.40 & 1521.60 & 1579.20 & 1636.60 & 1694.00 & 1814.40 & 1935.20 & 2055.60 & 2176.40 \\  & Dentine & a & 240.06 & 356.00 & 472.00 & 588.00 & 704.01 & 914.00 & 1124.00 & 1334.00 & 1544.60 \\  & & m & 240.06 & 399.69 & 559.34 & 718.99 & 878.66 & 1121.90 & 1365.16 & 1608.42 & 1851.66 \\  & & c & 474.43 & 619.04 & 763.64 & 908.24 & 1052.84 & 1175.63 & 1298.42 & 1421.21 & 1544.00 \\  & & C & 240.06 & 247.04 & 254.04 & 261.04 & 268.05 & 279.41 & 290.78 & 302.15 & 313.54 \\ \hline
**PDL Stress** & **PDL** & **a** & 6.20 & 9.43 & 12.63 & 15.83 & **19.12** & **22.60** & **26.08** & **29.56** & **33.06** \\
**Exceeding** & & **m** & 12.24 & 16.29 & **20.34** & **24.39** & **28.44** & **33.67** & **38.90** & **44.13** & **49.36** \\ \hline
**MHP** & & **c** & **48.52** & **62.18** & **75.84** & **89.50** & **103.16** & **122.28** & **141.40** & **160.52** & **179.64** \\ \hline \hline \end{tabular}  
* structure—stress displayed by the entire tooth structure including the applied bracket. dentine—stress displayed by the dentine–cmentment component of the tooth structure. a—root apical third, m—root middle third, c—root cervical third, C—crown.  
\end{table} 
Table 7: _Cont._In both intact and reduced periodontitis from the total amount of stress applied on and around the stainless-steel bracket base, only a constant percentage reached the alveolar bone socket (9.6-20% in 0 mm loss up to 36.73-50.04% in 8 mm loss), PDL (0.29-1.2% in 0 mm loss up to 2.24-8.37% in 8 mm loss), NVB (0.22-0.57% in 0 mm loss up to 0.32-0.69% in 8 mm loss), and dental pulp (0.02-0.05% in 0 mm up to 0.02-0.12% in 8 mm loss).