Subtalar Fusion for Correction of Forefoot Abduction in Stage II Adult-Acquired Flatfoot Deformity

2020 ◽  
pp. 193864002095105
Author(s):  
James P. Davies ◽  
Xiaoyue Ma ◽  
Jonathan Garfinkel ◽  
Matthew Roberts ◽  
Mark Drakos ◽  
...  
Keyword(s):  
Patient Reported Outcomes ◽  
Chart Review ◽  
Statistical Significance ◽  
Retrospective Chart Review ◽  
Stage Ii ◽  
Primary Study ◽  
Study Objective ◽  
Subtalar Fusion ◽  
Patient Reported

Background Correction of talonavicular uncoverage (TNU) in adult-acquired flatfoot deformities (AAFD) can be a challenge. Lateral column lengthening (LCL) traditionally is utilized to address this. The primary study objective is examining stage II AAFD patients and determining if correction can be achieved with subtalar fusion (STF) comparable to LCL. Methods Following institutional review board approval, retrospective chart review performed identifying patients meeting criteria for stage IIB AAFD who underwent either STF with concomitant flatfoot procedures (but not LCL) to correct TNU, or who underwent LCL as part of their flatfoot reconstruction. Patients indicated for STF had one or more of the following: higher body mass index (BMI), were older, had greater deformity, lateral impingement pain, intraoperative spring ligament hyperlaxity. Patients without 1-year follow-up or compete records were excluded. All other patients were included. A total of 27 isolated STFs identified, along with 143 who underwent LCL. Pre-/postoperative radiographic parameters obtained as well as PROMIS (Patient-Reported Outcomes Measurement Information System) and FAOS (Foot and Ankle Outcome Score) scores. Radiographic and patient reported outcomes both preoperatively and at 1-year follow-up evaluated for both groups. Results STF patients were older ( P < .05), with higher BMIs ( P < .004). STF had significantly worse TNU ( P < .001) than LCL patients, and average change in STF TNU was larger than LCL change postoperatively ( P = .006), after adjusting for age, BMI, gender. PROMIS STF improvement reached statistical significance in Physical Function (P 0.011), for FAOS Pain (P 0.025) and Function ( P = 0.04). Conclusions STF can be used in appropriately indicated patients to correct flatfoot deformity without compromising radiographic or clinical, correcting not only hindfoot valgus, but also talonavicular uncoverage (TNU) and corresponding medial arch collapse. Levels of Evidence: Level III: Retrospective chart review comparison study (case control)

scholarly journals Short Term Radiographic and Patient Outcomes of a Novel Biplanar Plating System for Hallux Valgus Correction

2019 ◽  
Vol 4 (4) ◽  
pp. 2473011419S0029
Author(s):  
Kshitij Manchanda ◽  
Stephen Blake Wallace ◽  
Junho Ahn ◽  
George T. Liu ◽  
Michael D. Van Pelt ◽  
...  
Keyword(s):  
Hallux Valgus ◽  
Statistical Significance ◽  
Retrospective Chart Review ◽  
Complication Rates ◽  
Time Of Surgery ◽  
Radiographic Parameters ◽  
Valgus Angle ◽  
Patient Reported ◽  
Outcome Scores

Category: Bunion, Midfoot/Forefoot Introduction/Purpose: Hallux valgus is a complex deformity of the great toe and is a major cause of pain for patients. Despite the variety of techniques, traditional osteotomies often do not address rotational deformities. A novel biplanar plating system was used to perform correction of metatarsal rotation at our institution starting in 2017. The purpose of this study was to determine the correction of rotational deformity and of radiographic parameters, maintenance of this correction (versus recurrence of hallux valgus), complication rates and patient-reported objective survey scores. We sought to determine prognostic factors for successful correction, including age, gender, and time of surgery. Methods: By retrospective chart review, we identified all patients treated by the novel biplanar plating at our institution. We recorded patient demographics, pre-operative range of motion and maltracking, surgical details, operative complications, and any subsequent surgery. Imaging was reviewed at pre-operative and post-operative visits to approximate the hallux valgus angle (HVA), intermetatarsal angle (IMA), and tibial sesamoid position (TSP). Outcome scores (AOFAS, FAAM, SF12 PCS and MCS) pre- operatively and post-operatively at 3 months, 6 months and 12 months were also recorded. The changes in these radiographic parameters and scores were then computed and analyzed to determine if there was an improvement with surgery. Results: Fifty-seven procedures (in 55 patients) were performed and evaluated. There were 8 complications and average follow- up time was 27.1 weeks (+13.8 weeks). Older age was significantly associated with more complications (p = 0.018). Gender and time of surgery did not show any significant association with complications. Radiographic parameters including HVA, IMA, and TSP were analyzed. At 3 and 6 months post-operatively, these parameters were significantly reduced from pre-operative values. At 12 months, there was a trend towards significant reduction (p values of 0.06, 0.06, and 0.053 respectively); however, there were fewer patients who maintained follow-up during this period. The Outcome scores showed improvement post-operatively, but only the AOFAS score showed statistical significance at 3 and 6 months. Conclusion: Although statistical analysis was limited due to our population size and the retrospective nature of the study, there was an overall improvement in both radiographic parameters and clinical outcome scores. Older patients are also at higher risk of complications. Malrotation correction with this biplanar plating system is a novel technique and does require meticulous training. With continued expansion of our patient database and further longitudinal analysis, we hope to determine not only if correction is maintained over time, but also if the steepness of the learning curve affects the number of complications earlier versus later in each individual surgeon’s experience.

scholarly journals Two Year Follow-Up of Patient Reported Outcomes Following Third Generation Minimally Invasive Chevron Akin Osteotomies (MICA) in Hallux Valgus Surgery

2020 ◽  
Vol 5 (4) ◽  
pp. 2473011420S0005
Author(s):  
Thomas L. Lewis ◽  
Robbie Ray ◽  
David Gordon
Keyword(s):  
Minimally Invasive ◽  
Hallux Valgus ◽  
Patient Reported Outcomes ◽  
Statistical Significance ◽  
Case Series ◽  
Published Data ◽  
Third Generation ◽  
Specific Patient ◽  
Patient Reported

Category: Bunion Introduction/Purpose: The aim of this study was to explore the 2 year results of third generation (using screw fixation) Minimally Invasive Chevron and Akin osteotomies (MICA) for hallux valgus correction. There is a paucity of published data regarding the outcomes of this relatively new technique. We present the largest series in the literature, using three separate validated patient-reported outcome measures (EQ-5DL, VAS Pain and Manchester Oxford Foot Questionnaire (MOXFQ), for this time point. Methods: A single surgeon case series of patients with hallux valgus underwent primary third generation minimally invasive chevron and akin osteotomies for hallux valgus correction. Between August 2015 and January 2018, 290 MICAs were performed in 203 patients that were eligible for 2 year follow up. Baseline and 2 year post-operative patient reported outcomes were collected for 164 feet in 130 patients (124 females; 6 males). Paired t-tests were used to determine the statistical significance of the difference between pre- and post-operative scores. Results: The mean age was 56.6 (range 29.5-81.0, standard deviation (s.d.) 10.9). At two year follow up, mean MOXFQ scores improved for each domain: Pain; baseline 40.6 (range 0-100, s.d. 22.8), reduced to 11.3 (range 0-75, s.d. 16.0, p<0.001); Walking; 36.0 (range 0-100, s.d. 25.9) reduced to 8.2 (range 0-75.0, s.d. 16.0, p<0.001); Social interaction; 46.7 (range 0-100, s.d. 24.3), reduced to 7.7 (range 0-75.0, s.d. 13.9, p<0.001). Mean VAS Pain score improved from 30.4 (range 0.0-90.0, s.d. 23.6) to 9.4 (range 0.00-70.0, s.d. 15.6, p<0.001). Mean EQ-5D index score improved from 0.750 (range 0.066-1.000, s.d. 0.148) to 0.892 (range 0.410-1.000, s.d. 0.135, p<0.001). Mean EQ-5D VAS score did not significantly improve from 81.9 (range 0-100, s.d. 17.1) to 83.0 (range 0-100, s.d. 18.0, p=0.559). Conclusion: This is the largest prospective case series of short-term patient reported outcomes using a validated assessment method for hallux valgus, following third generation MICA to date. These data show that this technique is effective at improving foot and ankle specific patient reported outcomes at 2 years. This cohort is being followed over the longer term.

Dosage Changes in Long-Term Botox Use for Laryngeal Dystonia

2008 ◽  
Vol 139 (2_suppl) ◽  
pp. P49-P49
Author(s):  
Hakan Birkent ◽  
Nicole C Maronian ◽  
Patricia F. Waugh ◽  
Albert L Merati ◽  
David Perkel ◽  
...  
Keyword(s):  
Total Dose ◽  
Chart Review ◽  
Retrospective Chart Review ◽  
Duration Of Effect ◽  
Laryngeal Dystonia ◽  
Patient Reported ◽  
Number Of Treatment ◽  
Over Time

Objective Botulinum toxin (BTX) injections continue to be the mainstay of treatment for laryngeal dystonia (LD). Many patients are entering their 2nd and 3rd decade of treatment. In this study, the dosage consistency of BTX injections over time was examined in patients with long-term BTX use for LD. Methods Retrospective chart review, 1990–2007. Patients with adductor-type LD who had received at least 20 injections to the thyroarytenoid (TA) muscles were included in the study. The change of total dose and patient-reported effective weeks were investigated; data of the first 5 injections were excluded to eliminate initial dose searching. Results 55 patients (11 male, 44 female, mean age 60.6) with a mean follow-up period of 149.9 ± 43.7 months (range 44 to 211 months) were identified. Total number of treatment episodes was 1825 with a mean of 33.18 ± 10.37 (range 20 to 58) and a mean interval of 19.1 ± 1.3 (range 2 to 118) weeks. The average total dose of BTX for each treatment episode was 2.15 ± 0.37 U (range 0.125 to 10.00 U). The total dose trended downward over time; this trend became statistically significant at 13th injection. The overall mean duration of effect was 15.5 ± 1.1 (range 1 to 58) weeks and did not show a significant change over time. Conclusions The BTX dose needed for a constant response in the treatment of LD decreases over time, raising the concern that neural recovery from repeated BTX is not infinite.

scholarly journals Patient Outcomes Differences Following Ankle Fracture Fixation with or without Ankle Arthroscopy

2020 ◽  
Vol 5 (2) ◽  
pp. 2473011420S0001
Author(s):  
Kenneth S. Smith ◽  
Katherine D. Drexelius ◽  
Shanthan C. Challa ◽  
Daniel K. Moon ◽  
Joshua A. Metzl ◽  
...  
Keyword(s):  
Physical Function ◽  
Ankle Fracture ◽  
Patient Reported Outcomes ◽  
Chart Review ◽  
Ankle Arthroscopy ◽  
P Value ◽  
Function Score ◽  
Patient Reported ◽  
Physical Function Score

Category: Arthroscopy; Ankle; Trauma Introduction/Purpose: Ankle fractures are one of the most common types of fractures, yet there is currently no consensus about how best to treat these patients. The treatment approach typically includes open reduction-internal fixation (ORIF), but not all patients have a good clinical outcome. Intra-articular injuries have been suggested as one potential cause of these sub-optimal outcomes. Use of arthroscopy at the time of surgery is useful in identifying intra-articular lesions in acute ankle fractures, however, there is no evidence that arthroscopic intervention changes the patient’s outcome. Ankle arthroscopy increases the duration and potential complications of anesthesia administration and also increases cost. Our study assesses the clinical impact of arthroscopy accompanying an ankle fracture ORIF, which is essential to promote positive outcomes, while decreasing unnecessary complications and costs. Methods: This is a retrospective chart review. We queried all patients that underwent operative fixation of a bimalleolar or trimalleolar ankle fracture at our institution from January 1, 2014 through November 1, 2018. From this list, we excluded patients less than 18 years old and patients that had concomitant injuries to other body parts that required surgery. In addition, we only included Weber B and Weber C fibula fracture to homogenize the data. We then performed a chart review to extract all demographic data, fracture pattern, surgical procedures performed, tourniquet times, any revision surgeries, arthroscopic findings and any interventions performed due to the arthroscopic portion of the procedure. We then conducted a phone and email survey utilizing the Patient Reported Outcomes Measurement Information System (PROMIS) Global Health Short Form and the two question Patient Acceptable Symptom State (PASS). Results: Our study included 213 total patients (142 traditional ORIF, 71 ORIF plus arthroscopy) with an average age of 40 (standard deviation 14.2). The average follow up was 32.4 (13.1) months with a survey follow up rate of 50.7%. The demographic information between the two cohorts was statistically similar. The average tourniquet time for the arthroscopy cohort is 10 minutes longer (89 minutes versus 79 minutes). During the arthroscopy, there was a 28.2% rate of full thickness osteochondral lesions, 33.8% rate of loose bodies, and a 49.2% rate of small cartilage injury not requiring intervention. The mean PROMIS physical function score amongst Weber B fibula fractures was 45.8 and 42.3 in the arthroscopy and non-arthroscopy groups respectively (P value 0.012). In addition, the patient satisfaction rate in Weber B fibula fractures was higher in those patients that underwent arthroscopy as compared to ORIF alone (93.1% versus 75.5%, P value of 0.05). Patients that suffered a tibiotalar joint dislocation at the time of the ankle fracture had a significantly higher PROMIS physical function score (46.6 versus 40.2, P value 0.005) when their surgery included arthroscopy. Conclusion: Ankle arthroscopy at the time of ORIF led to higher mean patient reported outcomes for every tested metric but this reached statistical significance only when looking at the Weber B fibula fractures and ankle dislocations. There was no increase in complication rate and the arthroscopy took only 10 minutes longer on average. [Table: see text]

scholarly journals Outcomes Following the Treatment of Talar Osteochondral Lesions with BioCartilage and Bone Marrow Aspirate Concentrate Mixture

2018 ◽  
Vol 3 (3) ◽  
pp. 2473011418S0004
Author(s):  
Ashraf Fansa ◽  
Mark Drakos ◽  
Taylor Cabe ◽  
Peter Fabricant
Keyword(s):  
Bone Marrow ◽  
Patient Reported Outcomes ◽  
Bone Marrow Aspirate ◽  
Statistical Significance ◽  
Osteochondral Lesions ◽  
Foot And Ankle ◽  
Bone Marrow Aspirate Concentrate ◽  
Patient Reported ◽  
The Mean

Category: Arthroscopy Introduction/Purpose: With reported incidence rates ranging from 40% to 70% post ankle sprains and fractures, osteochondral lesions of the talus (OLT) are not uncommon. However, management of such defects remains challenging. Microfracturing is considered the standard treatment for symptomatic OLTs.Larger lesions however typically require more invasive restorative procedures such as autologous osteochondral transplantation. Microfracture results are variable due to the fact that the resulting reparative fibrocartilage is weaker and biomechanically inferior to native hyaline cartilage. In this study, we examine the functional and radiological outcomes following use of a new arthroscopic technique utilizing a mixture of micronized allograft cartilage matrix (BioCartilage) (Arthrex, Naples, FL) soaked in Bone Marrow Aspirate Concentrate (BMAC) to fill OLTs. Methods: Eighty-six consecutive patients treated for OLT using arthroscopic debridement and BioCartilage matrix soaked in BMAC were identified. All patients were treated by a single fellowship-trained sports medicine and foot and ankle surgeon. Functional outcomes were assessed using the Foot and Ankle Outcome Score (FAOS) and Patient-Reported Outcomes Measurement Information System (PROMIS). This information was obtained from a prospective registry at the authors’ institution. Wilcoxon signed rank tests were used to determine statistical significance between pre and postoperative clinical scores. Additionally, an attending radiologist assessed the reparative cartilage morphology on postoperative MRI scans. This was evaluated and scored using a modified magnetic resonance observation of cartilage tissue (MOCART) scoring system. Results: Thirty-one patients (19 Females; 12 Males) with a mean age of 37.8 years (Range 15–54) had a minimum follow-up duration of 12 months and were thus included in this review. Mean follow-up duration was 15.8 months (Range 12 –25.7). The mean patient BMI was 27.4 (Range 19.6 – 39.4), while the average osteochondral lesion size was 85.9 mm2 (Range 35 – 220). The Physical Function domain of the PROMIS score, demonstrated statistically significant change, improving from 40.63 ±8.31 to 48.31 ±10.07 (p=0.02). The Pain Intensity domain also improved significantly from 49.06 ±9.32 to 42.14 ±9.38 (p=0.03). The Pain Interference domain and FAOS scores did improve but not reaching statistical significance. The mean MRI MOCART score was 69 ±13.34 with 13.3 months average follow-up duration. Conclusion: Achieving the longest duration possible of symptom-free functioning postoperatively is the main goal of any cartilage repair procedure. Augmentation of an articular lesion’s infill with BioCartilage and BMAC may help enhance the biomechanical properties of the reparative fibrocartilage construct and its longevity. Our initial findings demonstrate favorable patient-reported outcomes. Moreover, postoperative MRIs demonstrate the majority of the lesions showed either complete or hypertrophic infill, complete or hypertrophic integration, homogenous repair tissue, and isointense signals. Long-term studies prospectively assessing the effectiveness of this technique in maintaining pain-free-function of the ankle joint are warranted.

scholarly journals Patient-Reported Outcomes and Radiographic Assessment in Primary and Revision Stage II, III, and IV Progressive Collapsing Foot Deformity Surgery

2021 ◽  
Vol 6 (1) ◽  
pp. 247301142199211
Author(s):  
Rusheel Nayak ◽  
Milap S. Patel ◽  
Anish R. Kadakia
Keyword(s):  
Patient Reported Outcomes ◽  
Statistical Significance ◽  
Stage Ii ◽  
Foot Deformity ◽  
Primary Stage ◽  
Radiographic Outcomes ◽  
Metatarsal Angle ◽  
Medial Cuneiform ◽  
Significant Difference ◽  
Patient Reported

Background: Progressive collapsing foot deformity (PCFD) is a progressive hindfoot and midfoot deformity causing pain and disability. Although operative treatment is stage dependent, few studies have looked at patient-reported and radiographic outcomes stratified by primary vs revision stage II, III, and IV reconstruction surgery. Our goal was to assess operative improvement using Patient-Reported Outcomes Measurement Information System (PROMIS) and to determine whether radiographic parameter improvement correlates with patient-reported outcomes. Methods: PROMIS Physical Function (PF) and Pain Interference (PI) scores were prospectively obtained on 46 consecutive patients who underwent PCFD reconstruction between November 2013 and January 2019. Thirty-six patients completed pre- and postoperative PROMIS surveys, 6 patients completed only preoperative PROMIS surveys, and 4 patients completed 12-month postoperative PROMIS surveys but did not complete preoperative PROMIS surveys. Minimum follow-up was 12 (average, 23) months. Radiographic correction was measured with pre- and postoperative weightbearing radiographs and correlated with PROMIS scores. Measurements included the talonavicular uncoverage angle, talonavicular uncoverage percentage, anteroposterior talo–first metatarsal angle, Meary angle, medial cuneiform height (MCH), and medial cuneiform–fifth metatarsal height. Results: For the overall cohort, PROMIS PF increased significantly from 37.5±5.6 to 42.3±7.1 ( P = .0014). PROMIS PI improved significantly from 64.5±6.0 to 55.1±9.8 ( P < .0001). Preoperative, postoperative, and change in PROMIS scores were not statistically different between PCFD stages. Change in PROMIS PI was significantly greater in primary (–12.3) vs revision (–3.7) surgery ( P = .0157). Change in PROMIS PF was greater in primary (+6.0) vs revision surgery (+2.3) but did not reach statistical significance. All radiographic measurements improved significantly ( P < .05). In primary stage II PCFD, postoperative PROMIS scores correlated with postoperative MCH (PF: r = 0.7725, P = .0020; PI: r = –0.5692, P = .0446). Conclusion: Patient-reported and radiographic outcomes improved significantly after PCFD reconstruction. We found no significant difference in preoperative, postoperative, or change in PROMIS scores between PCFD stages. However, stage III patients had smaller improvements in PROMIS PF, which we feel may be secondary to change in function after arthrodesis. Primary operations had better patient-reported outcomes compared to revision operations. In primary stage II PCFD, reconstructing the medial arch height correlated significantly with improvement in pain and functionality. Level of Evidence: Level II, prospective cohort study.

scholarly journals Imageless computer assisted navigation in ceramic-on-ceramic total hip arthroplasty vs. manual approach: a single-centre retrospective study

10.29007/9gpf ◽  
2019 ◽  
Author(s):  
John McLoughlin ◽  
Mo Mathew ◽  
Stephen Grant
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Patient Reported Outcomes ◽  
Statistical Significance ◽  
Computer Assisted ◽  
Total Hip ◽  
Patient Reported ◽  
Cup Positioning

Background: Acetabular cup positioning is vital to the long-term survivorship of total hip arthroplasty (THA). Malalignment has been linked to dislocation, wear and osteolysis. Although there are many studies demonstrating the reduction in variability of cup positioning with computer-assisted techniques, there are relatively few reporting long-term patient reported outcomes and revision rates. Aim: The aim of this study was to review whether those patients who underwent navigated THA had better long-term survivorship or better patient reported outcomes. Methods: We compared revision rates and Oxford hip scores of 152 THAs (47 navigated and 105 non-navigated) performed at a single site between 2003 and 2008, with a minimum follow-up of 10 years. Results: 9 of the non-navigated and none of the navigated hips were revised at 10 year follow-up (p=0.057). There were no observable differences in 10-year Oxford hip scores between the navigated and non-navigated hips, 44.82 and 43.38 respectively. Conclusion: With respect to the rate of revision, although statistical significance was not achieved, it can be shown from our data that there was a clinically significant reduction in revision rates with navigated vs. non-navigated techniques. More data with higher patient numbers in the navigated cohort may be required to validate the results of our study.

Carbon dioxide laser treatment for Hailey-Hailey disease: a retrospective chart review with patient-reported outcomes

2015 ◽  
Vol 54 (11) ◽  
pp. 1309-1314 ◽  
Author(s):  
Phillip C. Hochwalt ◽  
Kevin N. Christensen ◽  
Sean R. Cantwell ◽  
Thomas L. Hocker ◽  
Clark C. Otley ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Laser Treatment ◽  
Patient Reported Outcomes ◽  
Carbon Dioxide Laser ◽  
Chart Review ◽  
Retrospective Chart Review ◽  
Patient Reported

scholarly journals Patient-Reported Outcomes and Early Complications After Synthetic Cartilage Device Implantation

2020 ◽  
Vol 5 (3) ◽  
pp. 247301142093069
Author(s):  
William M. Engasser ◽  
J. Chris Coetzee ◽  
Patrick B. Ebeling ◽  
Bryan D. Den Hartog ◽  
Jeffrey D. Seybold ◽  
...  
Keyword(s):  
Patient Reported Outcomes ◽  
Case Series ◽  
Retrospective Chart Review ◽  
Hallux Rigidus ◽  
Early Complications ◽  
Level Of Evidence ◽  
Device Implantation ◽  
Patient Reported ◽  
Level I

Background: Previous Level I studies show promising results for the use of a hydrogel synthetic cartilage implant (SCI) for the treatment of hallux rigidus. A recent independent retrospective review has put those results into question, however. The purpose of this article is to report patient-reported outcomes and early complications using this implant so as to add to the paucity of data in the literature regarding this implant. Methods: This was a retrospective chart review of patients undergoing hydrogel synthetic cartilage implant for the treatment of hallux rigidus from July 2017 to November 2018. Data collected included patient demographics, radiographic grading, and outcomes: Veterans Rand 12 Item Health Survey (VR-12), Foot and Ankle Ability Measure (FAAM), visual analog scale (VAS), patient satisfaction, and complications. Fifty-four patients (59 feet) with an average age of 57.6 (range, 39-78) years were analyzed. The average latest follow-up was 18.9 (range, 3-31.3) months. Body mass index was 26.7 (range, 18.7-35.2). None were diabetic and 5 were smokers. Results: The mean outcome improvements were 6.5 points (VR-12 Physical), 17.2 points (FAAM ADL), 27.4 points (FAAM Sport), and 18.4 points (VAS) ( P < .01 for each). Scores were significantly improved from preoperatively to most recent follow-up for FAAM ADL (71.0 vs 88.2 points), FAAM Sports (44.6 vs 72.0 points), and VAS (49.4 vs 31.0) ( P < .01). Overall, 72.5% patients would definitely or probably have the operation again. Ten patients (18.5%) went on to have revision surgery. Of these, 7 patients were revised to an arthrodesis, and 1 metal hemiarthroplasty and 2 implants were removed because of infection. Conclusion: Synthetic cartilage implantation for the treatment of hallux rigidus demonstrated improved pain and outcome scores at short-term follow-up. Reoperation and conversion to fusion rates were comparable to prior studies. Level of Evidence: Level IV, case series.

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