Godoy-Monzon Daniel, Martinez Saul, Perez Torres Javier, Avendano Duran Felix Eduardo, Pascual Jose Manuel, Garcia-Mansilla Agustin Maria
Orthopedic and Traumatology Service , Hospital Italiano de Buenos Aires, Buenos Aires, Argentina.
Hospital Santa Clara, Bogotá, Colombia.
Eur J Orthop Surg Traumatol. 2022 Apr;32(3):533-540. doi: 10.1007/s00590-021-03000-5. Epub 2021 May 26.
The aim of this prospective study was to evaluate the clinical-radiological outcomes of the Alteon Neck Preserving Stem (ANPS) (Exactech, Gainesville, FL, USA) implanted in four different centres by five senior hip surgeons with a minimum of 5 years of follow-up.
We conducted a multicentre prospective study that analysed 155 consecutive total hip replacements during 2014. We performed clinical-radiological analysis measuring Harris Hip Score (HHS), subjective satisfaction evaluation, radiolucencies, position of components, limb length discrepancy, heterotopic ossification, medical and surgical complications and a survival analysis at 5 years follow-up.
Thigh pain was reported in 5 cases (3.2%), 2 of which reported mild pain, 2 moderate, and 1 severe. In 2 cases, subsidences of 3 mm were detected in the first scheduled X-ray, both related to intraoperative fractures with no progression after 3 months. The overall complication rate was 5.8% and 6 of the 9 complications were in the first 30 cases. Mean HHS improved from 42.9 points (range 37.2-55.7 points) preoperatively to 94.9 on average (range 87-98) at the end of the follow-up (p <0.01). Subjective evaluation was excellent in 130 (83.87%) cases and good in 25 patients (16.13%).
The clinical-radiographic results of ANPS THR are satisfactory. The mid-term results are promising. However, long-term follow-up studies are necessary to confirm the validity of the concept.
本前瞻性研究旨在评估由五位资深髋关节外科医生在四个不同中心植入的Alteon保留颈干（ANPS）（美国佛罗里达州盖恩斯维尔Exactech公司）的临床放射学结果，并进行至少5年的随访。
我们进行了一项多中心前瞻性研究，分析了2014年连续155例全髋关节置换术。我们进行了临床放射学分析，测量Harris髋关节评分（HHS）、主观满意度评估、透亮区、假体位置、肢体长度差异、异位骨化、医疗和手术并发症，并在5年随访时进行生存分析。
5例（3.2%）报告有大腿疼痛，其中2例报告轻度疼痛，2例中度疼痛，1例重度疼痛。2例在首次预定的X线检查中发现有3mm的下沉，均与术中骨折有关，3个月后无进展。总体并发症发生率为5.8%，9例并发症中有6例发生在前30例病例中。平均HHS从术前的42.9分（范围37.2 - 55.7分）提高到随访结束时的平均94.9分（范围87 - 98分）（p <0.01）。主观评估中，130例（83.87%）为优秀，25例（16.13%）为良好。
ANPS全髋关节置换术的临床放射学结果令人满意。中期结果很有前景。然而，需要长期随访研究来证实该概念的有效性。
