All experimental groups demonstrated a significant reduction in the final mesial root length of the upper right first molar compared to the untouched upper left first molar.
The linear measurement of the maximum mesial root length reveals significant root shortening of the experimental right first molar compared to the untouched left first molar for all experimental groups (Figure 6).
Volumetric measurement of the total root structure and the mesial root separately reveals a significant reduction in the root volume of the replanted upper right first molar compared to the untouched upper left first molar (Figure 7).
Volumetric assessment reveals a reduction in the tissue and bone volume in the inter-radicular region of the upper right first molar compared to the untouched upper left first molar (Figure 8).
We thus looked for a factor that may drive a faster evolution of the upper molar compared to the lower molar.
This evidences a lower canalisation of the third molar compared to the first teeth of the molar row, a result repeatedly found in rodents, arvicolines [37] as well as murines [4], and up to large mammals [38].
