Squeaking after third-generation ceramic-on-ceramic total hip arthroplasty

We retrospectively reviewed records of 1002 patients who underwent a third-generation ceramic-on-ceramic total hip arthroplasty. Fifteen patients complained of squeaking, at any time after their arthroplasty. Of these 15 patients, 14 were evaluated clinically and radiologically. These 14 patients were found to have significantly higher mean body mass index of 25.8 kg/m(2) as compared with all the other patients who did not complain of squeaking (mean, 23.7 kg/m(2)) (P = .022). The acetabular opening angle was significantly lower (mean, 34°) than a matched control group (mean, 38°) (P = .016). Limb length shortening of more than 5 mm was observed in 12 (85.7%) of the 14 patients as compared with only 4 (28.6%) of 14 patients in the matched control group. Flexion and sitting cross legged were identified as the movements, which most commonly (11/12) resulted in squeaking. The incidence of squeaking was found to be low (1.5%), and we identified high body mass index, decreased acetabular opening angle, and limb length shortening as factors associated with squeaking.     

Squeaking in third- and fourth-generation ceramic-on-ceramic total hip arthroplasty: meta-analysis and systematic review

Postoperative squeaking in ceramic-on-ceramic total hip arthroplasty is a recently emerging phenomenon. We performed a meta-analysis of published data to examine patient and procedural risk factors. Twelve studies (6137 patients, total) were analyzed, with 150 patients (2.4%) complaining of squeaking. The only significant patient risk factor was increasing body mass index (P = .03, n = 2957). There was no significance found with patient age, sex, height, weight, or procedural laterality for squeak incidence. For implant type, the presence of a Stryker Accolade femoral stem (beta-titanium; Stryker Orthopedics, Mahwah, NJ) was significantly found to increase squeak (P < .0001, n = 4654). The presence of a raised metallic lip on the acetabular component was not found to be associated with squeak. Acetabular cup position was also not found to have a significant bearing on the incidence of squeaking.     

陶对陶与陶对聚乙烯假体在全髋关节置换术中的中期随访分析

目的：比较陶对陶（ceramic-on-ceramic,COC）与陶对聚乙烯假体（ceramic-on-polyeth-ylene,COP）在全髋关节置换术中应用的可靠性和耐用性。方法对77例接受初次全髋关节置换的患者进行回顾性研究,比较 COC 与 COP 两种不同假体术后髋关节功能及并发症。结果COC组与 COP 组术后髋关节 Harris 评分分别为92．6±5．1和91．3±4．2,差异无统计学意义（P ＞0．05）;两者在翻修、脱位、陶瓷破碎、异响、松动、骨溶解、深部感染、异化骨化发生率的比较,差异无统计学意义（P ＞0．05）。结论COC 与 COP 假体均能获得较好的临床疗效,两者术后在髋关节功能及并发症方面疗效相当。     

Alumina femoral head fracture in uncemented total hip arthroplasty with a ceramic sandwich cup

In total hip arthroplasty, insertion of a UHMWPE-coated ceramic sandwich liner dramatically reduces any risk related to the stiffness of the ceramic-ceramic coupling. We present a case of an alumina ceramic head fracture with a ceramic sandwich cup. The fracture occurred 16 months after the initial operation, without trauma. Impingement between the neck and posteroinferior portion of the liner rim had occurred. This was related to the traditional cross-legged sitting position of Koreans, which caused impingement between the neck and liner rim. Consequently, the taper became loose, and the resulting force bent the taper and fractured the head. We examined a peculiar case of ceramic femoral head fracture after implantation of an uncemented total hip arthroplasty with a ceramic sandwich cup and investigated the underlying cause.     

A rare complication of ceramic-on-ceramic bearings in total hip arthroplasty

Each year, approximately 217000 primary total hip arthroplasties (THAs) are performed in the United States (National Center for Health Statistics, 2003). This number is expected to increase as our population ages, and the indication for THA expands to younger and more active patients. Efforts are continually being made to improve implant design and, ultimately, patient outcomes. One area in particular that has undergone tremendous change is bearing surface technology. Ceramic-on-ceramic technology has gained widespread popularity in young patients because of its improved wear characteristics and durability. Bearing surface advancement must be tempered with analysis of implant-specific complications. We report a case of an audible hip complication after the use of ceramic components in THA.     

Vaginal mass following uncemented total hip arthroplasty

A 53-year-old woman developed a vaginal mass following an uncemented total hip arthroplasty. The mass was in direct communication with the hip through an acetabular medial wall defect after loosening of the acetabular component. The mass formation was caused simultaneously by changes secondary to polyethylene wear, a tiny delamination of the porous titanium mesh coating and a broken antirotational tab on the acetabular cup, all of which may have served as sources of metal particles. A careful evaluation of the patient''s history, symptoms, X-ray findings and computed tomography scans should always be performed to ensure accurate diagnosis.     

Ceramic-on-ceramic total hip arthroplasty in patients younger than 20 years

Total hip arthroplasty (THA) in the adolescent patient has historically shown relatively poor survivorship. This study reports the results of THA in young patients using contemporary ceramic bearings. Twenty-four THAs were performed using ceramic bearing surfaces in patients 20 years old or younger (mean, 16.4; range, 12-20). Average follow-up was 52 months (range, 25-123 months). The survival rate was 96%, with 1 revision for a loose acetabular component. Other complications included a peroneal nerve palsy that resolved and 2 dislocations in 1 patient. Postoperatively, the Modified Harris Hip Score mean was 93.4 (range, 66-100). This study shows promising results at short-term to midterm follow-up in very young patients who undergo THA using ceramic-on-ceramic components.     

Spectral characterization of squeaking in ceramic‐on‐ceramic total hip arthroplasty: Comparison of in vitro and in vivo values

Squeaking is a cause for concern in total hip arthroplasty (THA). However, the definition of this sound remains vague. Our goals were to characterize spectrally the squeaking in vitro under lubricated conditions and to compare the in vitro frequencies to in vivo frequencies. Four patients, who presented with a squeaking after ceramic‐on‐ceramic THA were investigated. In addition, 3 alumina ceramic 32 mm diameter components were tested in vitro under edge loading conditions using a friction simulator. Tests were conducted under lubricated conditions without and with the addition of a third body alumina particle. In vitro, no squeaking occurred under edge loading conditions. However, with the addition of a third body particle in the contact region, squeaking was obtained; the dominant frequency was 2.6 kHz. In vivo, the main recorded sound frequencies were: 2.3, 2.24, and 2.46 kHz for squeakers during walking and 1.45 kHz for a squeaker rising from a bent position. The in vivo recordings had a dominant frequency similar to, but slightly lower than, the in vitro values. Two types of squeaking were found in vivo and characterized spectrally. The rising squeaker had intermittent squeaking corresponding to a lower fundamental frequency compared to the walking squeakers. This finding suggests two different mechanism of squeaking. © 2011 Orthopaedic Research Society Published by Wiley Periodicals, Inc. J Orthop Res 30:185–189, 2012     

Delta陶瓷界面在人工全髋关节置换中初步应用体会

目的探讨应用Delta陶瓷界面行陶对陶人工全髋关节置换术治疗髋关节疾患的早期临床疗效。方法对15例不同髋关节疾病患者应用Delta大直径陶瓷股骨头及Delta陶瓷内衬全髋关节假体系统行人工全髋关节置换。术后多模式有效镇痛及早期下床功能锻炼。根据Harris评分系统进行评估髋关节功能,并了解有无术后并发症等情况。结果 15例均获随访,时间3~13（10.8±6.8）个月。Harris髋关节评分术前为7.0~55.8（43.6±23.2）分,术后8个月时为81.3~97.6（91.2±8.5）分。2例患者术后患髋轻微疼痛,无其它并发症发生。结论 Delta陶瓷界面人工全髋关节假体系统治疗髋关节疾患早期疗效满意,鉴于Delta陶对陶假体的物理性能及设计理念,预计患者将得到长期的优良生活质量。     

Conversion total hip arthroplasty: Primary or revision total hip arthroplasty

Total hip arthroplasty (THA) is an increasingly common procedure among elderly individuals. Although conversion THA is currently bundled in a diagnosis related group (DRG) with primary THA, there is a lack of literature supporting this classification and it has yet to be identified whether conversion THA better resembles primary or revision THA. This editorial analyzed the intraoperative and postoperative factors and functional outcomes following conversion THA, primary THA, and revision THA to understand whether the characteristics of conversion THA resemble one procedure or the other, or are possibly somewhere in between. The analysis revealed that conversion THA requires more resources both intraoperatively and postoperatively than primary THA. Furthermore, patients undergoing conversion THA present with poorer functional outcomes in the long run. Patients undergoing conversion THA better resemble revision THA patients than primary THA patients. As such, patients undergoing conversion THA should not be likened to patients undergoing primary THA when determining risk stratification and reimbursement rates. Conversion THA procedures should be planned accordingly with proper anticipation of the greater needs both in the operating room, and for in-patient and follow-up care. We suggest that conversion THA be reclassified in the same DRG with revision THA as opposed to primary THA as a step towards better allocation of healthcare resources for conversion hip arthroplasties.     

Squeaking in ceramic‐on‐ceramic hips: No evidence of contribution from the trunnion morse taper

Squeaking in ceramic‐on‐ceramic (CoC) total hip arthroplasty (THA) was investigated with an acoustic monitoring device to distinguish between squeaking emanating from the trunnion morse taper (TMT) connection versus the articular surface. 82 patients with implant problems scheduled for revision were selected and acoustic emissions (AE) with simple movements monitored. Five of these patients with CoC implants underwent surgery and their retrieved implant components were analyzed in vitro. In vivo recordings of all 82 patients found audible squeaks produce frequency content across the entire 0–50 kHz spectrum. Of the five CoC implants the in vivo peak frequency range of flexion/extension motions was 0.8 kHz and comparable to the range of in vitro testing (0.2 kHz). In vitro TMT connection motions were very large comparatively, producing a higher average peak frequency range of 22.5 kHz. All retrieved implants showed evidence of wear at the TMT connection. These findings suggest, the TMT connection does not directly cause audible squeaking. Wear occurring at this junction may contribute to debris which disrupt lubrication, increase friction, and produce noise. This observation supports current evidence suggesting that squeaking is from the bearing surface. Our findings are the first to demonstrate that in CoC THA the recordable noise of a hip squeak does not originate nor have contribution from the TMT connection. © 2016 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:1793–1798, 2017.

     

Ceramic on ceramic hip arthroplasty in fused hips

Background:Most literature in the field of total hip arthroplasty (THA) for fused hips, until date has reported the results of using metal on polyethylene and ceramic on polyethylene bearings. Results of THA using ceramic on ceramic (CoC) bearings in fused hips have not been published in literature. This study reports the results of cementless THA using CoC articulation perfomed in fused hips.Results:Mean Harris hip score improved from 42.4 to 84.2 and mean leg lengthening of 36.6 mm was achieved. In the average 5.4 years (range 2.8-9.1 years) followup there were no cases with osteolysis around acetabular cup and femoral stem. In this study, there was no case of ceramic fracture. There was one case of squeaking.Conclusion:This study suggests that cementless THA performed for fused hips with CoC bearings can provide good early clinical results.     

Long term results of the Corin C-Fit uncemented total hip arthroplasty in young patients

Introduction  We conducted a prospective study to evaluate the long-term results after Corin C-Fit uncemented total hip arthroplasty in young patients with hydroxyapatite or porous coated components. Materials and methods  We prospectively followed 36 patients (38 hips) who had Corin C-Fit uncemented total hip arthroplasties by eight experienced consultant surgeons at two centres. The acetabular and femoral components were hydroxyapatite or porous coated. Results  The overall 10-year survival rate for the Corin C-Fit arthroplasty was 43%. The 10-year survivorship for the femoral implant was 56% and for the acetabular component 59%. Conclusion  The evidence presented in this study suggests that the Corin C-Fit uncemented total hip arthroplasty has one of the highest mid- and long-term failure rates for both femoral and acetabular components in the literature. We believe this implant should not be used and patients who have had this form of total hip arthroplasty should be kept under regular review.     

Cementless alumina-on-alumina total hip arthroplasty in patients younger than 50 years: a 5-year minimum follow-up study

Sixty-seven patients (78 hips) who were younger than 50 years underwent cementless total hip arthroplasty using a porous-coated acetabular cup, an alumina liner, a 28-mm alumina head, and a proximally porous-coated femoral stem. One patient (1 hip) died and 2 patients (3 hips) were lost to follow-up. The remaining 64 patients (74 hips) were followed for 5 to 6 years. Their mean age at the index operation was 37 years. The mean Harris hip score was 94 points at the time of final follow-up. Four patients (4 hips) had mild thigh pain. All acetabular and femoral components were bone-ingrown, and neither pelvic nor femoral osteolysis was identified. No fracture of the ceramic liner or head was identified. Wear of the ceramic components was undetectable in 27 hips in which measurement was possible.     

生物型假体全髋置换术后早期负重近期效果

目的 探讨生物型全髋置换早期下床负重的可行性.方法 将56例年龄≤70岁的生物型假体全髋置换术后患者随机分成早期负重组(27例)和晚期负重组(29例),所有病例均采用小切口微创技术.早期负重组术后1周内下床拄拐自由负重,晚期负重组术后6周后下地负重,分别对两组进行术后6周和3、6、12、24个月的临床和影像学随访.髋关节功能按Harris评分,并对评分结果进行统计学分析.结果 术后6周、3个月的Harris评分早期负重组为(71.9±10.2)分、(87.6±9.4)分,晚期负重组为(60.3±9.1)分、(74.0±12.0)分,早期负重组明显高于晚期负重组(P＜0.01),Xx线最后随访时假体无松动、下沉;晚期负重组有2例患肢深静脉血栓形成.结论 在保证术中假体初始稳定性的前提下,生物型全髋置换术后可以早期下床负重;近期能明显促进患肢的功能恢复,预防下肢深静脉血栓形成.     

Articular Noise After THA Using Delta CoC Bearings Has Little Impact on Quality of Life

BackgroundTo report clinical outcomes and survival at a minimum of 10 years of a consecutive series of uncemented total hip arthroplasty (THA) with fourth-generation ceramic-on-ceramic (CoC) bearings and determine the incidence of articular noises, their risk factors, and impact on quality of life (QoL).MethodsFrom a series of 456 CoC THAs, there were 25 revisions, 38 deceased, and 36 lost to follow-up. The remaining 357 hips were assessed at 11.1 ± 0.7 years (range, 10-14) using the Forgotten Joint Score, Oxford Hip Score, and a questionnaire on articular noises. Kaplan-Meier survival was calculated, and multivariable analysis was performed to determine associations between articular noise and patient/surgical factors.ResultsThe 10-year survival was 96.3% for the cup, 96.5% for the stem, and 94.2% for all components. The Forgotten Joint Score was 79 ± 26 (range, 0-100), and Oxford Hip Score was 16 ± 7 (range, 12-60). The mean impact of articular noises on QoL was 1.8 ± 2.9 (range, 0-9): considered negligible in 60 hips (16%), moderate in 27 hips (7%), and severe in only 13 hips (4%). Multivariable analyses revealed that the incidence of articular noise decreased with age (odds ratio [OR], 0.94; P = .001), body mass index (OR, 0.85; P = .001), and in hips implanted with 32-mm (vs 36 mm) heads (OR, 0.18; P = .030).ConclusionOf 100 hips (28%) that reported some articular noises 10 years after CoC THA, the impact of articular noises on QoL was negligible for most patients. Although larger heads can improve mobility and reduce risks of dislocations, surgeons must be aware that increasing head size could also increase risks of articular noises, notably in young and active patients.     

全髋置换术治疗髋关节发育不良

目的探讨全髋置换术治疗髋关节发育不良(DDH)的手术方法并评价其临床疗效。方法12例DDH患者根据Crowe分型:Ⅰ型2例,Ⅱ型4例,Ⅲ型4例,Ⅳ型2例。全部采用B iom et全髋假体置换。髋臼假体均为生物型固定,股骨假体除2例骨水泥固定,其余为生物型固定。3例髋臼重建利用自体股骨头于髋臼前外方植骨造盖,9例于真臼水平将髋臼内移;3例股骨重建于转子下截骨短缩并纠正前倾;Ⅲ、Ⅳ型DDH行关节周围软组织松解。结果患者术后均未出现坐骨神经麻痹、下肢深静脉栓塞、切口感染及早期人工关节脱位等并发症。肢体延长最多4.8 cm,平均2.8 cm。随访6个月~2年,Harris髋关节评分由术前平均40.7分提高到84.5分,未发生人工关节脱位或假体松动。结论对有症状的DDH或强烈要求改善步态的年轻患者,全髋置换术是一种有效的治疗方法。     

Squeaking sound in total hip arthroplasty using ceramic-on-ceramic bearing surfaces

Purpose  

To evaluate the causes and frequency of the squeaking sound in ceramic-on-ceramic THA.     

全髋关节置换术治疗僵直髋的临床疗效

目的探讨僵直髋患者行全髋关节置换术(THA)的临床疗效。方法采用THA治疗16例僵直髋患者(21髋),比较手术前后髋关节被动屈曲度、Harris评分。结果患者手术均顺利完成。16例患者均获得随访,时间6个月~3年。未出现术后切口感染、脂肪栓塞、下肢静脉血栓、假体松动等并发症。末次随访时,被动屈曲度由术前0°提高至62°~96°(76.5°±8.3°)(P<0.01);Harris评分由术前14~38(27.2±2.8)分提高至67~92(84.1±6.5)分(P<0.01);髋关节功能:优8髋,良9髋,可3髋,差1髋,优良率17/21。结论THA治疗僵直髋,能够减轻髋关节疼痛,增加髋关节活动度,改善髋关节功能,提高患者的生活质量。术前的充分准备及丰富的手术经验是手术成功的关键。     

Cementing techniques for primary total hip arthroplasty

Total hip arthroplasty is a well-established procedure in the treatment of end-stage degenerative arthritis of thehip. Long-term follow-up studies have indicated varied results in cemented arthroplasty and has prompted further research into additional methods of fixation other than cement as well as the improvement of cementing techniques. More recent long-term follow-up studies of cemented arthroplasty have demonstrated that superb results can be achieved and maintained, but require precision in both the preparation of bone, cementing techniques, and positioning of the implant.This article outlines the precise technology necessary to achieve long-term stability in cemented total hip arthroplasty in both the acetabulum and femur. No attempt has been made to discriminate specific shapes and types of materials of the individual implants.