Vezzoni L, Montinaro V, Vezzoni A
Aldo Vezzoni, DVM Diplomate ECVS, Clinica Veterinaria Vezzoni, Via Massarotti 60/A, 26100 Cremona, Italy, Phone: +39 0372 23451, Fax: +39 0372 20074, E-mail:
Vet Comp Orthop Traumatol. 2013;26(5):408-15. doi: 10.3415/VCOT-13-02-0029. Epub 2013 Jun 26.
Loosening of the acetabular cup is one of the most common complications following total hip replacement and has an incidence rate of 1.8% to 36.8%. The objective of this study was to describe the surgical technique for the application of a cementless acetabular component specifically designed for treatment of cup loosening and preliminary clinical experience. The Kyon revision cup is composed of two components; the first is a perforated titanium outer shell with holes for 2.4 mm titanium screws, which is impacted into the acetabulum after removal of the loose cup and reaming of the acetabulum. It is secured with a variable number of screws. The second component is an inner plain titanium cup with an ultra-high-molecular-weight polyethylene insert, which is impacted into the outer shell to obtain press-fit stability. This revision cup was used in 31 dogs with cup loosening and a minimum follow-up period of six months. There were four intra-operative complications and two postoperative complications. The main intra-operative complication was difficulty inserting the inner cup into the outer shell. Postoperative complications included craniodorsal hip luxation in one dog, which was successfully managed, and cup loosening in another dog, which required explantation of the prosthesis. The main advantage of the revision cup appears to be increased implant stability afforded by screw fixation. Our initial clinical results in 31 dogs were promising; all but one dog had a successful clinical outcome.
髋臼杯松动是全髋关节置换术后最常见的并发症之一，发生率为1.8%至36.8%。本研究的目的是描述一种专门设计用于治疗髋臼杯松动的非骨水泥髋臼组件的手术技术及初步临床经验。Kyon翻修杯由两个组件组成；第一个是带孔的钛制外壳，有用于2.4毫米钛螺钉的孔，在取出松动的髋臼杯并对髋臼进行扩孔后，将其打入髋臼。用数量不等的螺钉固定。第二个组件是一个内部为普通钛杯，带有超高分子量聚乙烯内衬，将其打入外壳以获得压配稳定性。该翻修杯用于31只髋臼杯松动的犬，最短随访期为6个月。有4例术中并发症和2例术后并发症。主要术中并发症是将内杯插入外壳困难。术后并发症包括1只犬发生颅背侧髋关节脱位，经成功处理；另1只犬髋臼杯松动，需要取出假体。翻修杯的主要优点似乎是螺钉固定可提高植入物的稳定性。我们对31只犬的初步临床结果很有前景；除1只犬外，所有犬的临床结局均成功。
