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Zimmer - Chronic Bone Marrow Lesions (BML)
Bone Marrow Lesions (BML) are MRI-visible defects in the subchondral bone. BML can only be seen on fat-suppressed MRI sequences (T2FS, PDFS, etc.) where they appear as a hazy white area against the background of darker bone. Pathologists have shown that BML represent a healing response to trauma such as micro trabecular fractures of the subchondral bone.1
Overview
Subchondral bone defects filled with bone substitute material during the SCP Procedure may include:
Chronic bone marrow lesions with/without associated cysts.
Insufficiency fractures of trabecular bone.
- Injected AccuFill BSM is replaced with new bone during the healing process.
- The procedure is usually performed along with arthroscopy to aid in visualization, the SCP procedure does not inhibit the treatment of other findings inside the hip joint when performed along with arthroscopy.
- Typically an outpatient procedure, so patients generally return home the same day.
- SCP Procedure does not preclude future procedures. Should it become necessary, future surgery is still an option.
In these patients, current treatment guidelines recommend an initial course of conservative care which may heal the defect. If the defect remains, The SCP Procedure may be an option.
During The SCP Procedure, AccuFill BSM, an injectable, flowable, engineered calcium phosphate bone substitute is used to fill a subchondral bone defect. AccuFill® BSM crystallizes and hardens in an endothermic reaction at 37° C to form a nanocrystalline, macroporous scaffold in the bone. Over time, through cell-mediated remodeling, AccuFill BSM is resorbed and replaced with new bone.