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Hybrid Proximal Tibial Knee Joint - Comprehensive, safe, and effective solution

Created on 2025.12.03, Updated on 04.09, Published on 04.09
Planning report contains
  • Analysis of the preoperative situation based on the provided CT scan
  • Implant design for this patient's case
  • Demonstration of patient surgical procedures
  • Evaluation of patient’s postoperative imaging
  • Important information

Preoperation situation

Front view
Side view
Remarks: Due to the need for revision surgery to replace the temporary implant after removal of the patient's tumor prosthesis, conventional prostheses are not suitable for this condition. So We designed based on this model.

Osteotomy planning

Front view
Side view
Remarks: After in-depth communication with the doctor based on the patient's actual condition, the osteotomy location is determined in full compliance with the doctor's recommendations.
The subsequent design of the prosthesis strictly adheres to this osteotomy position.

Implant design

Front view
Side view
Custom proximal tibial prosthesis:
The total length of the prosthesis is about 150mm (the proximal end is measured from the middle position) and consists of three parts: 3D printing of the proximal prosthesis. The middle section is a modular extension section (60mm). A modular medullary cavity extension handle can be used at the distal end.

Position of prosthetic nail holes

Front view
Side view
As shown in the picture, there are 5 locking screws between the prosthesis and the bone for interaction, and 2 fixation screws between the prostheses for assembly.

Screw proposal
Screw number
Length (mm)
Diameter(mm)
  • Please note that screw lengths is
the maximum length.
  • Strictly follow the prescribed
screw sizes during surgery.
1
L20
M5
2
L20
M5
3
L40
M5
4
L40
M5
5
L40
M5
6
L30
M5
7
L30
M5
Intraoperative pictures
Complete the osteotomy of the patient's diseased area according to the osteotomy position planned before surgery, and install the patient's individually designed prosthesis.

Postoperative pictures
After the operation was completed, CT imaging was performed on the patient. From the postoperative imaging results, it can be seen that the operation was very successful.

Important information -----

💡
  • We will need both the patient prescription form filled out and sent over to us in order to produce and deliver the implant.
  • Beijing LDK Company provides customized implants, trial implants and bone models.
  • Indicate if additional administrative preparation is needed to receive/process custom implants at your hospital.
  • Note that it is highly recommended to perform the surgery within 6 months of the CT scan date; The implant will be produced in titanium (alloy Ti6Al4V). Please indicate if this possesses any problems.
  • All components are delivered non-sterile and need to be sterilized at hospital facility. For this purpose, the implant will be delivered at least one day ahead of surgery.
  • This implant is customized only for the specific patient.
  • When the customized implant designed and produced for a particular patient is more than a piece, the manufacturer is responsible for taking back all the remaining models except the implant which is eventually implanted into the patient's body and storing or destroying them as a retention sample for clinical use.
Contact
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Jason Jin