The growth plate or physis is a region near the end of the bone from which the new bone cells develop before the person reaches maturity, when it closes.
Surgeons try to avoid the growth plate
In children where surgery might cause damage to the growth plate, such as anterior cruciate ligament reconstruction, surgeons will generally try to avoid drilling through the growth plate in order to avoid later growth distubrances.
Growth Plate Injuries of the Lower Extremity: Case Examples and Lessons Learned. Sabharwal S and Sabharwal S. Indian J Orthop. 2018 Sep-Oct; 52(5): 462–469.
Elongation of the Long Bones in Humans by the Growth Plates. Hunziker EB. Nestle Nutr Inst Workshop Ser. 2018;89:13-23. doi: 10.1159/000486489. Epub 2018 Jul 10.