3. (En particulier) (Médecine) Action de passer une bandelette autour du col de l’utérus pour le maintenir fermé.
https://fr.wiktionary.org/wiki/cerclage

B.− CHIR. Cerclage des os; cerclage de l'anus, du col de l'utérus ( Méd. Biol. t. 1 1970).
https://www.cnrtl.fr/definition/cerclage

III.
A. − 1.
a) Action continue, progressive, de quelque chose (élément ou phénomène naturel) qui aboutit à une modification observable. Travail d'érosion.
https://www.cnrtl.fr/definition/travail

This is probably a case of a relaxed/migrated stem being held in place by tying up the bone.

The femoral stem is the portion of the replacement that fits into your thigh bone.
https://www.uiorthomd.com/blog/what-are-hip-replacement-impl...

Large cyclic movements between the femoral stem and bone during the first weeks after total hip arthroplasty may hamper bone ingrowth and adversely affect the eventual success of the arthroplasty. Little is known, however, about the magnitude of the motions and its relationship to design and surgical factors.
https://pubmed.ncbi.nlm.nih.gov/8618164/

There are concerns regarding initial stability and early periprosthetic fractures in cementless hip arthroplasty using short stems. This study aimed to investigate stress on the cortical bone around the stem and micromotions between the stem and cortical bone according to femoral stem length and positioning.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8076980/

Although some femoral stem migration is common and acceptable throughout recovery, substantial and continuous early migration can predict loosening of the femoral component and implant failure.13,14 Collared stem designs can provide greater stability and are associated with less migration than collarless designs.13,15
https://www.canjsurg.ca/content/65/4/E487

Stem undersizing is a documented risk factor for aseptic loosening as it affects primary stability and results in greater micromotion and implant migration.34
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9363127/

Cerclage wires have been used to stabilize proximal femoral cracks after stem insertion in cementless total hip arthroplasty. The objective of this study was to determine the optimal number and orientation of cerclage wires necessary to prevent stem subsidence and crack propagation. The crack was stabilized by 1, 2, or 3 wires placed either normal to the femoral neck axis or normal to the crack.
https://www.sciencedirect.com/science/article/abs/pii/S08835...

…, the aim of the current study was to investigate the effect of cerclage banding distally to an intraoperatively occurring proximal periprosthetic femoral clamshell fracture versus a non-fractured femur after total hip arthroplasty.
https://pubmed.ncbi.nlm.nih.gov/38135988/

This study demonstrates that a protective cerclage can successfully delay the occurrence of a fracture during stem impaction in reverse shoulder arthroplasty.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8509515/

Cerclage wires have been used to stabilize proximal femoral cracks after stem insertion in cementless total hip arthroplasty.
https://www.arthroplastyjournal.org/article/S0883-5403(99)90...

I would translate the context as follows:
These fractures are caused by movements/motions of the stem, and are eligible for cerclage.