Assessing mould costs analysing manufacturing processes of cavities

Influence of Different Surface Machining Treatments of Magnesium‐based Resorbable Implants on the Degradation Behavior in Rabbits

“…[22] Both investigations showed that an increase in surface roughness leads to a faster degradation of the implants. [22,35] This correlation could be seen in the present study, as well. Besides the surface enlargement caused by roughening the surface, changes in the electrochemical potential could also be a possible reason for the faster degradation.…”

“…Denkena and Lucas showed that different surface and subsurface properties which resulted from different surface machining treatments lead to different in vitro corrosion behavior of MgCa implants. [35] A previous in vivo study was able to confirm these results in rabbits. [22] Both investigations showed that an increase in surface roughness leads to a faster degradation of the implants.…”

“…On the other hand, there is no stabilizing trabecular meshwork of the spongy bone around the cylinder so that the pieces detached by the degradation are distributed into the surrounding tissue. This assumption is encouraged by Xu et al [43] A faster decomposition of magnesium implants leads to a greater release of gas in vitro [35] as well as in vivo in guinea pigs. [27] A correlation between the rate of degradation and the occurrence of gas generation was also clearly evident in the present study.…”

“…[16,22,28,31] Different studies concentrate on the twocomponent alloy system magnesium-calcium; they basically report on the constant corrosion rate and the possibility to adjust the corrosion, the biomechanical properties, and the biocompatibility by alloying different amounts of calcium. [28,[32][33][34][35] An adjustable and constant corrosion seems to be required to predict the period of degradation and to estimate the tissue reactions due to degradation products.…”

“…[34,[36][37][38] Also for polymers as existing resorbable implants, several studies proved an influence of different surface textures. [39,40] About the influence of magnesium-calcium implants with different surface textures, only one in vitro investigation [35] and one in vivo study with a small number of cases [22] have been carried out. In vivo investigations with a higher sample size are lacking.…”