But creating fully mature human tissue in a petri dish (in vitro) has proved a daunting challenge, especially when it comes to producing 3D organs.
Recreating this environment in vitro has proved more difficult than the simple aqueous environment needed to fold water-soluble proteins and this, in part, has limited studies on the folding of integral membrane proteins [47,48].
The fracture mechanisms of all-ceramic crowns are not yet fully understood, and simulations of clinical fractures in vitro has proved to be difficult 8, 9. Fractographic analyses of ceramic restorations fractured in clinical use reveal the fracture origin, the fracture path, and perhaps the reason for fracture 10, 11.
However, recent attempts to develop articular cartilage in vitro have proven to be difficult.
Numerous studies in vivo and mainly in vitro have proved the effect of several growth factors on the multiplication of dental pulp fibroblasts [ 26– 29], an action that can be continued, if necessary, by their transformation into odontoblasts [ 30, 31].
Human coagulation factor VIII (fVIII) is inefficiently biosynthesized in vitro and has proven difficult to express at therapeutic levels using available clinical gene-transfer technologies.
High volume generation of stem cell-derived cardiomyocytes from in vitro procurement has proven technically challenging, and subject to random selection or inter-platform variability [4], [8], [12], [41].
Heterologous or in vitro expression has proven a useful tool in unveiling the biochemical functions of P450s.
To more closely examine the molecular and cellular mechanisms behind the different physiological effects, the use of various in vitro models has proven to be valuable.
