Biomaterial como implante ortopédico no avanço da tuberosidade tibial em cães

Abstract

The purpose of this study was to evaluate a modified osteotomy technique for tibial tuberosity advancement (TTA) used for the treatment of cranial cruciate ligament (CCL) rupture in dogs. A biomaterial composed by ceramic and high molecular weight polymer was used to replace the conventional titanium cages and it was inserted in four adult male dogs weighing on average 20Kg. After the experimental section of CCL, the stifle joint was stabilized by modified technique for tibial tuberosity advancement. Orthopedic, radiographic and ultrasound examinations were performed monthly to evaluate the modified technique, and histological analysis of the samples obtained by biopsy were performed at 120 days postoperative. The bone healing, the correct positioning of the implant and the obtainment of the right angle between the tibial plateau and patellar ligament allowed the return of the joint function. Histological evaluation of the implant-bone interface showed no inflammatory reaction and absence of osteointegration. The radiographic exams during every evaluation period this experiment showed the presence of a radiolucent line in the interface implant-bone. After six months of evaluation, it can be concluded that TTA modified technique shows to be a new method of CCL rupture treatment, allowing the functional recovery of the limb by neutralizing the dynamic cranial tibial thrust with the aid of a biocompatible implant.