Skip to main content

Advertisement

Table 6 Stresses on PDL in group I and group II non-consolidated models (MPa)

From: Evaluating the effects of consolidation on intrusion and retraction using temporary anchorage devices—a FEM study

   Von Mises stresses Principle tensile stresses Principle compressive stresses
  Implant heights (mm) C.I L.I C PM M C.I L.I C PM M C.I L.I C PM M
Group I 7 0.003 0.028 0.019 0.003 0.003 0 0.005 0.026 0.002 0.002 0.001 0 −0.001 −0.001 −0.001
10 0.003 0.03 0.023 0.004 0.004 0.006 0.009 0.028 0.002 0.002 0.001 −0.001 −0.001 −0.001 −0.001
13 0.007 0.03 0.023 0.002 0.002 0.006 0.006 0.027 0.003 0.003 0.001 −0.001 −0.001 0 0
Group II 7 0.003 0.01 0 0.003 0.007 0.003 0.003 0.011 0.003 0.003 0 0 0 0 0
10 0 0.03 0.026 0 0 0.006 0.006 0.028 0 0 0.001 −0.001 −0.001 −0.001 0
13 0.003 0.03 0.027 0.003 0.002 0.006 0.006 0.027 0.002 0.003 0.001 −0.001 −0.001 −0.001 0
  1. Inference: +ve: tensile stresses; –ve: compressive stresses
  2. Group I: Von Mises stresses are more in laterals in 10- and 13-mm implant heights (0.030) in canines at 10- and 13-mm implant heights (0.023) and centrals in 13-mm implant height (0.007). Principle tensile stresses are more in 10-mm canines (0.028) and laterals (0.009) and centrals (0.006) at 10- and 13-mm implant heights. Compressive stresses are present in all teeth except in 7-mm implant height in lateral, 13-mm implant height in premolars and molars
  3. Group II: Von Mises stresses are more in canines in 10- and 13-mm implant heights (0.026 and 0.027, respectively). Principle tensile stresses are more in canines in 10- and 13-mm implant height (0.028 and 0.027, respectively). Compressive stresses are not observed in 7-mm implant height, and stresses are not observed in molars at 10- and 13-mm implant heights