scholarly journals Postoperative Functional and Radiological Outcome Comparison of Computer-assisted and Conventional Total Knee Arthroplasty at 6 Months Follow-up: A Cross Sectional Study

2020 ◽  
Vol 1 (1) ◽  
pp. 43-49
Author(s):  
Muhammad Budimansyah ◽  
Ismail Hadisoebroto Dilogo ◽  
Endrotomo Sumargono
Keyword(s):  
Functional Outcome ◽  
Weight Bearing ◽  
Oxford Knee Score ◽  
Lower Limbs ◽  
Coronal Plane ◽  
Computer Assisted ◽  
Mechanical Alignment ◽  
Assisted Navigation ◽  
Significant Difference

Background. Computer-assisted navigation TKA has just been adapted in Indonesia for the last decade. The method is aiming to achieve more precise mechanical alignment in TKA. However, controversies still exist especially in terms of functional outcome and radiological outcome.Method. Fifty elderly patients aged more than 50 years old with severe knee osteoarthritis (Kellgren Lawrence stage III or IV) who scheduled for TKA surgery in the first half of 2019 were consecutively sampled. All patients were measured for objective functional status with Western Ontario Mac Master University Index (WOMAC) and Oxford Knee Score (OKS). Weight-bearing, long-leg follow-up radiographs of both lower limbs were taken, and coronal tibiofemoral angle (CTFA), coronal femoral component angle (CFCA) and coronal tibial component angle (CTCA) were measured.Results. Group of computer-assisted navigation TKA surgery was found to have significantly lower WOMAC score (p0.05) and higher OKS score (p0.05). Although not statistically significant, greater angle of deviation is observed in the conventional TKA surgery group. Proportions with deviation of less than 3º were found more in the group using computer navigation.Discussion. The results of this study indicate the advantage of using a computer assisted  system in TKA procedure, in terms of better functional outcome. However, our study only measures mechanical alignment from coronal plane and short term follow up time. Other parameter measurement, such as mechanical alignment on sagittal plane, rotational alignment, and soft tissue balance are also important to determine the success rate of TKA procedure.Conclusion. Patients who had TKA surgery under computer-assisted navigation would benefit a better functional outcome if compared with conventional TKA surgery, as measured with WOMAC and OKS. However, there is no significant difference in terms of radiographic value of coronal-plane mechanical deviation on both methods.

scholarly journals Accuracy of Image-less Navigation for Functional Cup Positioning in Total Hip Arthroplasty

10.29007/3lbz ◽  
2019 ◽  
Author(s):  
Morteza Meftah ◽  
Vinnay Siddappa ◽  
Jeffery Muir ◽  
Peter White
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Weight Bearing ◽  
Safe Zone ◽  
Computer Assisted ◽  
Acetabular Cup ◽  
Assisted Navigation ◽  
Total Hip ◽  
Significant Difference ◽  
Cup Positioning

Computer-assisted navigation has the potential to improve the accuracy of cup positioning during total hip arthroplasty (THA) and prevent leg length discrepancy (LLD). The purpose of this study was to compare acetabular cup position and post- operative LLD after primary THA using posterolateral approach. Between August 2016 to December 2017, 57 THAs using imageless navigation were matched with 57 THA without navigation, based on age, gender and BMI. Post-operative weight-bearing radiographs were assessed using for anteversion, inclination and LLD. Goal for functional cup placement was 40° inclination and 20° anteversion based on preoperative weight bearing pelvic images. Functional LLD was measured as compared to pre- operative radiographs and contralateral side. Proportion of cups within Lewinnek’s safe zone, proximity to a pre-operative target of and the LLD >5 mm was assessed. The mean age was 54.9 ± 9.6 years (30 – 72) and 57.6 ± 12.5 years (20 – 85) in control and navigated groups, respectively. Mean cup orientation in the navigated group was 20.6°± 3.3° (17 - 25) of anteversion and 41.9°± 4.8° (30 - 51) of inclination, vs. 25.0°± 11.1° (10 - 31) and 45.7°± 8.7° (29 – 55) in control group, where were statistically significant (p=0.005 and p=0.0001), respectively. In the navigated group, significantly more acetabular cups were placed within Lewinnek’s safe zone (anteversion: 78% vs. 47%, p=0.005; inclination: 92% vs. 67%, p=0.002). There was no significant difference in mean LLD in navigation and control groups (3.1 ± 1.5 mm vs. 4.6 ± 3.4 mm, p=0.36), although fewer LLDs >5 mm were reported in the navigated group (7.1%) than in controls (31.4%, p=0.007). The use of this image-less computer-assisted navigation improved the accuracy with which acetabular cup components were placed and may represent an important method for limiting post-operative complications related to cup malpositioning and LLD.

scholarly journals Bone Lengthening with a Motorized Intramedullary Nail in 34 Patients with Posttraumatic Limb Length Discrepancies

2021 ◽  
Vol 10 (11) ◽  
pp. 2393
Author(s):  
Maxime Teulières ◽  
Tristan Langlais ◽  
Jérôme Sales de de Gauzy ◽  
Jan Duedal Rölfing ◽  
Franck Accadbled
Keyword(s):  
Weight Bearing ◽  
Limb Lengthening ◽  
Lower Limbs ◽  
Limb Length ◽  
Bone Lengthening ◽  
Important Conclusion ◽  
Pull Out ◽  
Significant Difference ◽  
The Mean

The Fitbone® motorized nail system has been used to correct limb length discrepancies (LLD) for several years. This study focuses on its application in posttraumatic limb lengthening surgery, its outcome and challenges. Materials and methods: A prospective, single center study was conducted between 2010 and 2019 in patients treated with motorized lengthening nails. The inclusion criteria were symptomatic LLD of 20 mm or more. An imaging analysis was done using TraumaCad® software (Brainlab AG, Munich, Germany) to compare frontal alignment angles and limb length discrepancy (LLD) on preoperative and latest follow-up radiographs of the lower limbs. Results: Thirty-four patients were included with a mean age of 28.8 ± 9.7 years, a mean follow-up of 27.8 ± 13 months and a mean hospital stay of 4.4 ± 1.7 days. The mean LLD was 44 ± 18 mm in 29 femoral and 32 ± 8 mm in 4 tibial cases, which was reduced to less than 10 mm in 25/34 (74%) patients. The mean healing index was 84.6 ± 62.5 days/cm for femurs and 92 ± 38.6 days/cm for tibias. The mean time to resume full weight-bearing without walking aids was 226 days ± 133. There was no significant difference between preoperative and final follow-up alignment angles and range of motion. The mechanical lateral distal femoral angle (mLDFA) was corrected in the subgroup of 10 LLD patients with varus deformity of the femur (preoperative 95.7° (±5.0) vs. postoperative 91.5° (±3.4), p = 0.008). According to Paley’s classification, there were 14 problems, 10 obstacles and 2 complications. Discussion: Six instances of locking screw pull out, often requiring reoperation, raise the question of whether a more systematic use of blocking screws that provide greater stability might be indicated. Lack of compliance can lead to poor outcomes, patient selection in posttraumatic LLD patients is therefore important. Conclusion: Limb lengthening with a motorized lengthening nail for posttraumatic LLD is a relatively safe and reliable procedure. Full patient compliance is crucial. In-depth knowledge of lengthening and deformity correction techniques is essential to prevent and manage complications.

Robotic-Assisted Patellofemoral Replacement—Correlation of Preoperative Planning with Intraoperative Implant Position and Early Clinical Experience: A Minimum 2-Year Follow-up

2020 ◽  
Author(s):  
Veenesh Selvaratnam ◽  
Andrew Cattell ◽  
Keith S. Eyres ◽  
Andrew D. Toms ◽  
Jonathan R. P. Phillips ◽  
...  
Keyword(s):  
Functional Outcome ◽  
Preoperative Planning ◽  
Trochlear Dysplasia ◽  
Oxford Knee Score ◽  
Implant Position ◽  
Robotic Assisted ◽  
Implant Positioning ◽  
Flexion Extension ◽  
The Mean

AbstractPatello-femoral arthroplasty (PFA) is successful in a selected group of patients and yields a good functional outcome. Robotic-assisted knee arthroplasty has been shown to provide better implant positioning and alignment. We aim to report our early outcomes and to compare Mako's (Robotic Arm Interactive Orthopaedic System [RIO]) preoperative implant planning position to our intraoperative PFA implant position. Data for this study was prospectively collected for 23 (two bilateral) patients who underwent robotic-assisted PFA between April 2017 and May 2018. All preoperative implant position planning and postoperative actual implant position were recorded. Presence of trochlear dysplasia and functional outcome scores were also collected. There were 17 (two bilateral) female and 6 male patients with a mean age of 66.5 (range: 41–89) years. The mean follow-up period was 30 (range: 24–37) months. Eighteen knees (72%) had evidence of trochlear dysplasia. The anterior trochlear line was on average, 7.71 (range: 3.3–11.3) degrees, internally rotated to the surgical transepicondylar axis and on average 2.9 (range: 0.2–6.5) degrees internally rotated to the posterior condylar line. The preoperative planning range was 4-degree internal to 4-degree external rotation, 4-degree varus to 6-degree valgus, and 7-degree flexion to 3-degree extension. The average difference between preoperative planning and intraoperative implant position was 0.43 degrees for rotation (r = 0.93), 0.99 degrees for varus/valgus (r = 0.29), 1.26 degrees for flexion/extension (r = 0.83), and 0.34 mm for proudness (r = 0.80). Six patients (24%) had a different size component from their preoperative plan (r = 0.98). The mean preoperative Oxford Knee Score (OKS) was 16 and the mean postoperative OKS was 42. No patient had implant-related revision surgery or any radiological evidence of implant loosening at final follow-up. Our early results of robotic PFA are promising. Preoperative Mako planning correlates closely with intraoperative implant positioning. Longer follow-up is needed to assess long-term patient outcomes and implant survivorship.

scholarly journals Open versus arthroscopic release for lateral patellar compression syndrome: a randomized-controlled trial

2021 ◽  
Author(s):  
Sherwan A. Hamawandi ◽  
Hazhar I. Amin ◽  
Ameer Kadhim Al-Humairi
Keyword(s):  
Functional Outcome ◽  
Patellar Instability ◽  
Controlled Trial ◽  
Lateral Release ◽  
Open Release ◽  
Arthroscopic Release ◽  
Compression Syndrome ◽  
Significant Difference ◽  
Lateral Patellar Compression Syndrome

Abstract Introduction Lateral patellar compression syndrome is one of the causes of anterior knee pain in young adults and resulted from tight lateral patellar retinaculum. The aim of our study is to compare between open and arthroscopic release of lateral patellar compression syndrome in relation of functional outcome, time of surgical procedure, length of hospital stays, intraoperative and postoperative complications as bleeding, infection, recurrence, and patellar instability with 2 years of follow-up. Materials and methods 80 patients, age (21–49 years), were divided randomly into 2 groups (A and B). Group A (40 patients) were treated with open release. Group B (40 patients) were treated by arthroscopic release. All these patients are diagnosed as lateral patellar compression syndrome depending on clinical features and MRI. All patients were assessed by Lysholm knee scoring scale before surgery and at periods of 2, 6 weeks, 6, 12, and 24 months after surgery. Results There is significant difference in functional outcome, measured by Lysholm knee scoring scale, between preoperative and postoperative assessment periods in both groups (P < 0.001). There is significantly better functional outcome at 2 years of follow-up with arthroscopic release (P = 0.018). There is no recurrence in both groups, but there were 4 patients develop medial patellar instability in the group of open release. Conclusion Both open and arthroscopic lateral release for patients with isolated lateral patellar compression syndrome can be effective surgical procedures, but arthroscopic release can achieve better functional outcome. Trial registration: NCT, NCT04130412. Retrospectively registered on 3rd of June, 2020 at ClinicalTrials.gov.

scholarly journals Radiographic Recurrence of Hallux Valgus Based on Osteotomy Location

2018 ◽  
Vol 3 (3) ◽  
pp. 2473011418S0021
Author(s):  
Andrew Federer ◽  
Travis Dekker ◽  
David Tainter ◽  
Jordan Liles ◽  
Mark Easley ◽  
...  
Keyword(s):  
Hallux Valgus ◽  
Weight Bearing ◽  
Surgical Correction ◽  
P Value ◽  
Single Individual ◽  
Hallux Valgus Angle ◽  
Intermetatarsal Angle ◽  
Valgus Angle ◽  
Significant Difference

Category: Bunion Introduction/Purpose: Hallux valgus (HV) is one of the most common deformities of the foot resulting in pain and lifestyle modification of the patient. Recurrence rates of 10-47% have been documented in single individual osteotomy series. Unfortunately, surgical correction and recurrence are often defined as changes related to normal radiographs and not actually as the magnitude of correction lost with follow-up. Currently there have not been studies evaluating the percentage of recurrence of intermetatarsal angle (IMA) and hallux valgus angle (HVA). As there is substantial difference in starting IMA and HVA, as well as amount of surgical correction, our goal was to evaluate the percentage loss of correction over time comparing preoperative, initial postoperative and minimum of 2-year follow up radiographs among three different surgical correction techniques. Methods: This is a retrospective chart review study that examines the weight-bearing radiographic measurements of patients undergoing hallux valgus corrective surgery at a single institution over 5 years. Fifty-three patients were divided into first tarsometatarsal arthrodesis (i.e. Lapidus), mid-diaphyseal osteotomies (i.e. scarf), and distal metatarsal osteotomies (i.e. chevron). The preoperative, initial postoperative, and final follow up weight-bearing radiographs were measured for intermetatarsal angle (IMA) and hallux valgus angle (HVA). Primary outcome was percentage of recurrence of IMA and HVA, with the difference in angles between preoperative and initial postoperative weight-bearing films being considered 100% correction. The percentage of recurrence between initial postoperative and most recent follow up was then calculated (Figure 1A). A one-way analysis of variance (ANOVA) test and post-hoc Tukey-Kramer tests were used to compare preoperative IMA and HVA and percentage recurrence of IMA and HVA at most recent follow up. Results: There was no significant difference between Lapidus (14.3deg) and mid-diaphyseal osteotomies (12.7deg) in preoperative IMA (p-value=0.26). There was a significant difference between Lapidus (-0.3deg) and mid-diaphyseal (2.8deg) osteotomies for degree of hallux valgus recurrence as measured by IMA between initial postoperative films and final 2-year follow up (p-value=0.009). Lapidus procedure showed a greater magnitude decrease in IMA degrees from preoperation to final follow up compared to distal osteotomy (p-value=0.037) and trended toward significance compared to mid-diaphyseal (p-value=0.056). Mid-diaphyseal osteotomies (30%) showed a statistically significant higher percentage of IMA recurrence compared to Lapidus (-11%) (p-value=0.0014) (Figure 1B). When comparing percentage recurrence of HVA, distal osteotomies had a significantly smaller rate of recurrence when compared to the diaphyseal osteotomies (p-value=0.030). Conclusion: Though Lapidus and mid-diaphyseal osteotomies were performed for patients with a similar preoperative IMA, mid-diaphyseal osteotomies had a significantly higher percentage of recurrence at 2-year follow up compared to Lapidus procedures. Moreover, Lapidus procedures trended toward greater overall of IMA correction compared to mid-diaphyseal osteotomies. When either a Lapidus or mid-diaphyseal osteotomy is indicated, a Lapidus procedure may result in decreased rate of radiographic recurrence of hallux valgus at 2 years.

scholarly journals Clinical and Radiographic Outcomes of 3D Printed Total Talus Arthroplasty

2019 ◽  
Vol 4 (4) ◽  
pp. 2473011419S0037
Author(s):  
Daniel Scott ◽  
John Steele ◽  
Amanda Fletcher ◽  
Selene Parekh
Keyword(s):  
Avascular Necrosis ◽  
Weight Bearing ◽  
Treatment Options ◽  
Ankle Motion ◽  
Motion Data ◽  
Radiographic Outcomes ◽  
Significant Difference ◽  
3D Printed ◽  
Vas Scores

Category: Ankle, Ankle Arthritis, Hindfoot, Trauma Introduction/Purpose: Patients with talar avascular necrosis have limited treatment options to manage their symptoms. Historically, surgical options have been limited and can leave patients with little ankle motion and have high failure rates. The use of custom 3D printed total talar replacements (TTR) has arisen as a treatment option for these patients, possibly allowing for better preservation of hind-foot motion. Patients undergoing TTR will demonstrate a statistically significant improvement in FAOS scores at one year after surgery. Methods: We retrospectively reviewed 15 patients who underwent a TTR over 2 years. Patient outcomes were reviewed including age, sex, comorbidities, etiology of talar pathology, number and type of prior surgeries, pre-operative and post-operative weight bearing radiographs, as well as FAOS and VAS scores, and range of motion. Data analysis performed with student T-test and multivariate regression. Results: Results: FAOS scores showed statistically significant improvements post-operatively as compared to pre-operative scores. There was a statistically significant decrease in VAS pain scores from 7.0 pre-operatively to 3.4 post operatively. There was no significant difference in pre-operative and post-operative coronal and sagittal alignment on weight bearing radiographs. All FAOS sub-score shows statistically significant improvements, with the exception of the sports/recreation sub-scale, did show a trend towards improved outcomes (p =0.19). Average follow-up was 12.8 months. Conclusion: Our hypothesis was confirmed that these patients show statistically significant improvements in AOFS and VAS scores at 1 year. Sagittal and coronal alignment was well maintained at an average of 1 year following surgery. TTR represents an exciting treatment options for patients with talar avascular necrosis, though longer-term follow-up is needed.

scholarly journals Outcome of intra-articular hyaluronic acid in treatment of osteoarthritis of knee at a tertiary care hospital in Kathmandu, Nepal

2019 ◽  
Vol 7 (1) ◽  
pp. 36-40
Author(s):  
Deepak Kumar Dutta
Keyword(s):  
Hyaluronic Acid ◽  
Knee Osteoarthritis ◽  
Functional Outcome ◽  
Tertiary Care ◽  
Oxford Knee Score ◽  
Functional Improvement ◽  
Care Hospital ◽  
Post Intervention ◽  
Viscous Solution

Background and Objectives: Intra-articular hyaluronic acid is widely used in the treatment of knee osteoarthritis. This study aimed to assess the efficacy of hyaluronic acid in moderate severity knee osteoarthritis. Material and Methods: Patients of knee osteoarthritis were administered single intra-articular injection of Hyaluronic Acid 25 mg (2.5 ml viscous solution) and were followed up at 4, 12, and 24 weeks. Functional improvement was assessed using Oxford Knee Score (OKS). Comparisons of pre- and post-intervention mean OKS scores were done by paired t test. Results: Total 50 patients (mean age 58.62±12.62 years) were studied. In the six months follow up, patients showed marked improvement in functional outcome from a mean OKS of 27 before injection to 39 at 4 weeks and remained constant up to 6months of follow up. Conclusion: Intra-articular hyaluronic acid injectionas a treatment modality for moderate grade knee osteoarthritis provides good functional outcome and pain control for up to six months.

scholarly journals 2019 IFFAS Award for Excellence Winner: Peri-Prosthetic Cysts and Alignment in Total Ankle Replacement: A 3-D, Weight Bearing Topographical Study

2019 ◽  
Vol 4 (4) ◽  
pp. 2473011419S0004
Author(s):  
Francois Lintz ◽  
Jef Mast ◽  
Nazim Mehdi ◽  
Alessio Bernasconi ◽  
Cesar de Cesar Netto ◽  
...  
Keyword(s):  
Weight Bearing ◽  
Total Ankle Replacement ◽  
Coronal Plane ◽  
Unequal Distribution ◽  
Hindfoot Alignment ◽  
Cyst Volume ◽  
Ankle Replacement ◽  
The Mean ◽  
The Difference

Category: Ankle, Ankle Arthritis Introduction/Purpose: Peri-prosthetic cysts (PPC) in Total Ankle Replacement (TAR) are a common failure cause but the mechanisms of their development remains unclear. One possible explanation could be hindfoot malalignment and subsequent unequal distribution of load inside the joint. However, how residual malalignment influences the evolution of PPC remains unclear. Computed tomography (CT) has demonstrated superiority on conventional radiography in the follow up of PPC. Weight Bearing CT (WBCT), by combining 3D imaging and weight bearing measurements seems a valid tool to investigate this further. The objective for this work was to study the effects of residual hindfoot deformity on the distribution of PPC in the coronal plane. We hypothesized that cysts would be found predominantly medially in varus configuration, and laterally in valgus configuration. Methods: Retrospective comparative study, ethics committee approved. Forty-eight cases of TAR were included, with relevant demographics. Inclusion criteria were cases of primary TAR with available WBCT imaging of their ankle as part of normal follow up. Exclusion criteria were subsequent implant revision or cyst grafting. In each case, the localization and size of PPC’s were documented and their volume calculated by approximation of the closest ellipsoid. Hindfoot alignment was evaluated by the percentage Foot Ankle Offset (FAO) (foot-length normalized 3D ratio between the midline of the foot and the center of the ankle) using a WBCT dedicated semi-automatic software. The mean FAO value with 95%CI for the population was calculated. The difference in medial and lateral cyst volume defined by their position relative to the median axis in the coronal plane was compared in varus and valgus cases by a Mann-Whitney non-parametric test for unpaired samples. Results: Demographic distributions of the series were 32% female, mean age 65 (45-85) years. Mean FAO value was 0.12% (95%CI -1.09 to 1.33). Mean follow up was 43 months (6 to 239). The mean total cyst volume per case was 1190,7 mm3. In varus cases (defined by FAO<-1.09%), the volume of medial cysts was greater than laterally by a mean 197 mm3, whereas in valgus cases (defined by FAO>1.33%), the volume of lateral cysts was greater than medially by a mean 332 mm3. The difference was statistically significant (p<0.05). There was a weak, significant positive correlation (r=0.25, p<0,001) between FAO and total cyst volume and a moderate, significant correlation (r=0,56, p<0,001) between time to follow up and total cyst volume. Conclusion: Our hypothesis was confirmed. Periprosthetic cysts volume in this series of primary TAR was found to be relatively greater medially in postoperative varus configurations and vice-versa laterally in valgus. This confirms a possible correlation between the direction of residual hindfoot malalignment and the coronal localization of PPC in TAR, although this is certainly not the only pathophysiologic factor involved in PPC onset. Weightbearing CT may be helpful in Total Ankle Replacement follow up, in order to early detect PPC development and possibly to identify situations at risk of a more rapid evolution.

Outcomes of Individuals with Transfemoral and Contralateral Transtibial Amputation due to Dysvascular Etiologies

2009 ◽  
Vol 33 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Sukhinder Bhangu ◽  
Michael Devlin ◽  
Tim Pauley
Keyword(s):  
Functional Outcome ◽  
Scale Score ◽  
Chart Review ◽  
Retrospective Chart Review ◽  
Walk Test ◽  
Amputation Level ◽  
Significant Difference ◽  
Transfemoral Prosthesis ◽  
Minute Walk

Objective: To evaluate the functional outcome of individuals with transfemoral and contralateral transtibial amputations secondary to peripheral vascular disease.Methods: A retrospective chart review followed by phone interview. The primary outcome measures were the discharge 2-minute walk test, Frenchay Activities Index, and the Houghton Scale.Results: There were 31 dysvascular individuals identified to have a combination of transfemoral/transtibial (TF/TT) amputation admitted to our institution for rehabilitation from February 1998 to June 2007. The mortality at follow up was 68%. There were eight surviving amputees. The average 2-minute walk test score was 31.9 m at the time of discharge from our inpatient program. Of these, the average Frenchay Activities Index was 15.3. The average Houghton Scale score for use of the transtibial prosthesis alone was 2.1. The average Houghton Scale score for use of both prostheses was 1.5. Comparisons between groups based on initial amputation level revealed a significant difference of being fitted with a transfemoral prosthesis. Those whom initially had a TT amputation were less likely to ultimately be fitted with a TF prosthesis ( X21,n=31 = 4.76, p < 0.05).Conclusion: The overall functional outcome of individuals with a combination of TF/TT amputation due to dysvascular causes is poor. These individuals have a low level of ambulation, activity, and prosthetic use.

scholarly journals Total Hip Arthroplasty Using Imageless Computer-Assisted Navigation—2-Year Follow-Up of a Prospective Randomized Study

2020 ◽  
Vol 9 (6) ◽  
pp. 1620
Author(s):  
Richard Lass ◽  
Boris Olischar ◽  
Bernd Kubista ◽  
Thomas Waldhoer ◽  
Alexander Giurea ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Clinical Outcome ◽  
Hip Arthroplasty ◽  
Important Determinant ◽  
Randomized Study ◽  
Prospective Randomized Study ◽  
Computer Assisted ◽  
Total Hip ◽  
Significant Difference

The purpose of this study is to compare computer-assisted to manual implantation-techniques in total hip arthroplasty (THA) and to find out if the computer-assisted surgery is able to improve the clinical and functional results and reduce the dislocation rate in short-terms after THA. We performed a concise minimum 2-year follow-up of the patient cohort of a prospective randomized study published in 2014 and evaluated if the higher implantation accuracy in the navigated group can be seen as an important determinant of success in total hip arthroplasty. Although a significant difference was found in mean postoperative acetabular component anteversion and in the outliers regarding inclination and anteversion (p < 0.05) between the computer-assisted and the manual-placed group, we could not find significant differences regarding clinical outcome or revision rates at 2-years follow-up. The implantation accuracy in the navigated group can be regarded as an important determinant of success in THA, although no significant differences in clinical outcome could be detected at short-term follow-up. Therefore, further long-term follow-up of our patient group is needed.

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