OssAbility TPLO Surgical Technique User Guide

OssAbility TPLO Surgical Technique

Specifications

• Product Name : Guided TPLO
• Intended Use : Treatment of cranial cruciate ligament (CCL) disease by tibial plateau levelling osteotomy
• Components: Osteotomy Guide, TPLO plate, locking screws
• Manufacturer: OssAbility

INSTALLATION INSTRUCTION

Step 1
Configure the TPLO Guide according to the pre-op plan

• Insert a 2.0 mm single-trocar pin through each of the positioning arms at the predetermined positions (A & B) and extend by 30 mm.
• Insert a 1.5 mm single-trocar pin through the central pinhole (C) and extend by 10 mm.
• Insert a 2.0 mm single-trocar pin through each oblique locking pin hole and leave flush with the underside of the Guide (D).

Step 2
Apply the TPLO Guide to the patient according to the pre-op plan

• Score a reference line across the intended osteotomy, extending from the crest to the MCL.
• Identify and mark the patellar tendon insertion.
• Align the proximal positioning pin (A) to the mark. Ensure both positioning pins (A & B) are in contact with the bone.
• Place the central pin (C) on the bone.
• Hold the Guide by the central pin and check the positioning pins are still in contact with the bone.

Step 3: Drill the central pin

• Check that the central pin (C) is perpendicular to the plane of stifle motion.
• Apply gentle pressure to the Guide and positioning pins (A & B) to maintain contact with the bone.
• Drill the central pin unicortically.
• Press the Guide onto the bone.
• Check that the central pin is perpendicular to the plane of stifle motion.

Step 4: Drill the oblique locking pins

• Check the positioning pins (A & B) are in contact with the bone.
• Drill the oblique locking pins (D) bicortically.
• Trim the oblique locking pins to 5 mm.

Step 5: Drill the stop pin

• Remove the positioning pins.
• Drill a 1.5 mm single-trocar stop pin bicortically at the planned rotation (E). Ensure the stop pin is parallel to the central pin (C) and is in contact with the Guide.

Step 6: Perform the osteotomy

• Protect the patellar tendon using a Senn retractor.
• Perform the osteotomy using a crescentic saw. Use copious saline lavage. Maintain blade alignment with the Guide. Ensure the saw blade does not extend beyond the bone.

Step 7: Rotate the proximal segment

• Replace the central pin (C).
• Rotate the proximal segment using the Guide until the Guide contacts the stop pin (E).
• If required, use a 3.2 mm rotator pin to assist with rotation. Drill unicortically into the caudomedial cortex of the proximal segment, proximal to the locking pins (F).
• Drill a 1.0—2.0 mm anti-rotation pin (G) bicortically through the crest and proximal segment, immediately proximal to the patellar tendon insertion.

Step 8: Check stifle stability

• Check the central pin (C) is parallel to the stop pin (E) and perpendicular to the plane of stifle motion.
• Check limb alignment.
• Check for cranial tibial thrust. If required, withdraw the anti-rotation pin (G) and increase rotation until resolved. Replace the anti-rotation pin.

Step 9: Remove the TPLO Guide

• Remove the rotation pin, central pin and stop pin. Remove the oblique locking pins.
• Remove the Guide.
• Compress the construct with pointed reduction forceps.

Step 10 : Place the plate according to the pre-op plan

• Position the plate on the tibia according to the pre-op plan.
• Check the proximal screws are centred on the proximal segment.
• Check the distal screws are centred on the diaphysis.
• Drill and place the screws according to the specific plate selection.

Step 11: Compare the completed construct to the pre-op plan

• Check the plate placement.
• Remove the anti-rotation pin.
• Perform post-op radiographs.
• Check post-op tibial plateau angle.

Contact information

• OssAbility Limited
• Website www.ossability.com
• Email info@ossability.com

Decision Support support.ossability.com
Guided TPLO Surgical Technique Version 2.

Products described in this document may be covered by patent.
© 2023 OssAbility Limited. All rights reserved.

Guided TPLO Surgical Technique
© 2024 OssAbility All rights reserved.
www.ossability.com

FAQ

• Q: What is the intended use of the Guided TPLO system?
  • A: The system is intended for the treatment of cranial cruciate ligament (CCL) disease by tibial plateau levelling osteotomy.
• Q: How can I access Decision Support for the Guided TPLO system?
  • A: You can access Decision Support at support.ossability.com for product information, application methods, and potential risks related to treatment.

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