Autograft Demonstrates Superior Outcomes for Revision Anterior Cruciate Ligament Reconstruction When Compared With Allograft: A Systematic Review

BACKGROUND

Multiple studies have compared outcomes among patients undergoing revision anterior cruciate ligament reconstruction (ACLR) with autograft versus allograft, but these data are inconsistently reported and long-term outcomes depending on graft type are yet to be determined.

PURPOSE

To perform a systematic review of clinical outcomes after revision ACLR (rACLR) with autograft versus allograft.

STUDY DESIGN

Systematic review; Level of evidence, 4.

METHODS

A systematic review of the literature was performed by searching PubMed, the Cochrane Library, and Embase to identify studies that compared the outcomes of patients undergoing rACLR with autograft versus allograft. The search phrase used was autograft allograft revision anterior cruciate ligament reconstruction. Graft rerupture rates, return-to-sports rates, anteroposterior laxity, and patient-reported outcome scores (subjective International Knee Documentation Committee, Tegner, Lysholm, and Knee injury and Osteoarthritis Outcome Score) were evaluated.

RESULTS

Eleven studies met inclusion criteria, including 3011 patients undergoing rACLR with autograft (mean age, 28.9 years) and 1238 patients undergoing rACLR with allograft (mean age, 28.0 years). Mean follow-up was 57.3 months. The most common autograft and allograft types were bone-patellar tendon-bone grafts. Overall, 6.2% of patients undergoing rACLR experienced graft retear, including 4.7% in the autograft group and 10.2% in the allograft group (P < .0001). Among studies that reported return-to-sports rates, 66.2% of patients with an autograft returned to sports as opposed to 45.3% of patients with an allograft (P = .01). Two studies found significantly greater postoperative knee laxity in the allograft group as compared with the autograft group (P < .05). Among all patient-reported outcomes, 1 study found 1 significant difference between groups: patients with an autograft had a significantly higher postoperative Lysholm score when compared with patients with an allograft.

CONCLUSION

Patients undergoing revision ACLR with an autograft can be expected to experience lower rates of graft retear, higher rates of return to sports, and less postoperative anteroposterior knee laxity when compared with patients undergoing revision ACLR with an allograft.

Fractures of the Proximal Ulna: A Spectrum of Injuries and Outcomes

Introduction

The purpose of this study is to assess the effect of radial head/ neck injury in association with proximal ulna fractures.

Methods

Between 2006 and 2020, 107 patients presented to our academic medical center for treatment of a proximal ulna fracture and were enrolled into an IRB-approved database. Radiographs, injury details, and surgical interventions were retrospectively reviewed. Patients were classified as having an isolated proximal ulna fracture (PU), a PU fracture with an associated radial head dislocation (M-D), or a Monteggia fracture with an associated radial head fracture (M-V). Clinical and functional outcomes were assessed at follow-up to determine what differences exist between fracture patterns. Statistics were generated using Chi-squared tests for categorical variables and one-way ANOVA tests for numerical variables.

Results

While all patients ultimately healed, time to radiographic healing in the PU cohort was shorter at 3.57 ± 1.7 months when compared to the M-V cohort (5.67 ± 3.8 months) (p < 0.05). At follow-up, patients in the M-V cohort had poorer elbow pronation and supination when compared to the PU and M-D cohorts (p < 0.05). Patients within the PU cohort had fewer complications than those in the M-D and M-V cohorts (p < 0.05). No differences were found between the three cohorts in regard to rates of reoperation, non-union, wound infection, and nerve compression (p > 0.05).

Conclusion

The Monteggia fracture with a concomitant radial head/neck fracture is a more disabling injury pattern when compared to an isolated proximal ulna fracture and Monteggia fracture without an associated radial head/neck fracture.

Patient obesity is associated with severity of proximal humerus fractures, not outcomes

PURPOSE

The purpose of this study is to evaluate the effect of obesity on the outcome of operatively treated proximal humerus fractures.

METHODS

Between December 2003 and October 2020, 240 patients with proximal humerus fractures requiring surgery were prospectively followed and classified according to the international AO/Orthopedic Trauma Association (AO/OTA) and Neer classifications. Patients' body mass indexes (BMI) were calculated and used to identify two groups, BMI ≥ 30 kg/cm (obese) and < 30 kg/cm (non-obese). Independent t tests were used for statistical analysis of continuous variables and χ² tests for categorical variables. Regression analysis was performed to determine if BMI was a predictor of fracture pattern severity as determined by the AO/OTA classification.

RESULTS

Overall, 223 patients who sustained proximal humerus fractures were analyzed. Patient age at time of injury was 60.5 ± 13.7 years. There were 67 AO/OTA 11A, 79 AO/OTA 11B, and 77 AO/OTA 11C fracture types. Seventy-two patients (32.3%) were obese. No significant differences were seen between groups in regard to demographic variables, Neer classification, or functional and clinical outcomes as determined by DASH scores and shoulder ROM, respectively. Statistical analyses confirmed that obesity is associated with more severe fracture patterns of the proximal humerus as categorized by the AO/OTA classification. An independent t test confirmed that BMI was significantly higher in the complex fracture group based on the AO/OTA classification (p = 0.047). Regression analysis also demonstrated that age (p = 0.005) and CCI (p = 0.021) were predictors of more severe fractures, while BMI approached significance (p = 0.055) based on the AO/OTA classification.

CONCLUSION

A significantly higher incidence of complex proximal humerus fracture patterns is observed in patients with higher body mass indexes based on the AO/OTA classification. Age and CCI are also associated with more severe fracture patterns of the proximal humerus as determined by the AO/OTA classification. No differences were seen in outcomes or complication rates between obese patients and non-obese patients.

LEVEL OF EVIDENCE

Level III.

The standardized exploration of the radial nerve during humeral shaft fixation reduces the incidence of iatrogenic palsy

BACKGROUND

The purpose of this study is to determine if a standardized protocol for radial nerve handling during humeral shaft repair reduces the incidence of iatrogenic nerve palsy post operatively.

METHODS

Seventy-three patients were identified who underwent acute or reconstructive humeral shaft repair with radial nerve exploration as part of the primary procedure for either humeral shaft fracture or nonunion. All patients exhibited intact radial nerve function pre-operatively. A retrospective chart review and analysis identified patients who developed a secondary radial nerve palsy post-operatively. In each case, the radial nerve was identified and mobilized for protection, regardless of whether the implant necessitated the extensile exposure.

RESULTS

Fractures were classified according to AO/OTA guidelines and included 23 Type 12A, 11 Type 12B, and 3 Type 12C. Eight patients had periprosthetic fractures and 28 fractures could not be classified. All patients in the cohort were fixed with locking plates. Surgery was indicated for 36 patients with humeral nonunions and 37 patients with acute humeral shaft fractures. Of the 73 patients, 2 (2.7%) developed radial nerve palsy following surgery, one from the posterior approach and one from the anterolateral approach. Both patients exhibited complete recovery of radial nerve function by 6-month follow-up. No significant differences (p > 0.05) were found in any demographic or surgical details between those with and without radial nerve injury.

CONCLUSIONS

Nerve exploration identification and protection leads to a low incidence of transient radial nerve palsy compared to the rate reported in the current literature (2.7% compared to 6-24%). Thus, radial nerve exploration and mobilization should be considered when approaching the humeral shaft for acute fracture and nonunion repairs.

LEVEL OF EVIDENCE

Level III.

Unstable Rotational Ankle Fractures Treated With Anatomic Mortise Repair and Direct Posterior Malleolus Fixation

Introduction: The purpose of this study was to evaluate patient outcomes following a standardized algorithmic approach to ankle mortise stabilization, following rotational fracture, utilizing direct repair of the posterior malleolus in the prone position. Methods: Eighty consecutive patients with unstable rotational ankle fractures that involved the posterior malleolus were analyzed. All underwent direct repair of the posterior malleolus regardless of size through a posterolateral approach. Electronic records were retrospectively reviewed for demographic information, initial injury and operation details, healing status, and complications. Preoperative and postoperative radiographs were obtained to assess the initial injury and healing was determined both by radiographic and clinical progress at follow-up visits. Results: Average posterior malleolus fragment width was 8.1 ± 3.7 mm (range = 2.1-19.9 mm) and percentage of the articular surface was 23.6% (range = 7.1%-56.7%) on the lateral radiograph. Overall, 80/80 (100%) patients healed their ankle fractures by a mean 2.9 ± 1.1 months. Only 1 (1.3%) patient required transsyndesmotic fixation following posterior malleolus repair. Mean range of ankle motion was as follows: dorsiflexion 20° ± 10°, plantarflexion 34° ± 10°, inversion 8° ± 4°, and eversion 7° ± 4°. Seventy-nine patients (98.8%) had an anatomic mortise reduction. Nine patients (11.3%) had a superficial wound complication, 3 patients (3.8%) had dysesthesia in the sural nerve distribution, and 1 patient (1.3%) lost reduction of the medial malleolus. Conclusion: Patients who undergo direct repair of the posterior malleolus in the prone position can expect a high rate of healing with superficial wound breakdown being the biggest problem, which was associated with an ankle fracture dislocation. Posterior malleolus fixation may obviate the need of transsyndesmotic stabilization.Levels of Evidence: Retrospective Level IV.

Surgeon Volume Impacts Outcomes Following Ankle Fracture Repair

Background:

The purpose of this study was to determine the impact of surgeon volume on outcomes following ankle fracture fixation.

Methods:

Over 7 years, 362 patients who met inclusion criteria (>18 years with rotational ankle fractures) were identified and treated by orthopaedic surgeons at several hospitals within an academic medical center and were retrospectively reviewed. Surgeons that completed less than 24 ankle fixations per year (<90th percentile) during the study period were classified as low-volume (LV) and surgeons completing 24 or more ankle fixations per year (>90th percentile) were classified as high-volume (HV). Chart review was conducted to gather data regarding perioperative, radiographic, inpatient, and long-term outcome data (average 12-month follow-up).

Results:

One hundred thirty-four patients (37.0%) were treated by LV surgeons and 228 (63.0%) were treated by HV surgeons. Although both cohorts had a similar breakdown of fracture patterns (P = .638), the LV cohort had a greater incidence of open fractures (P = .024). No differences were found regarding wait time to surgery, surgery duration, and LOS. Radiographically, more patients in the HV cohort achieved anatomic mortise after surgery (96.5% vs 89.6%, P = .008). Patients in the LV cohort took longer to heal radiographically (4.27 ± 2.4 months vs 5.59 ± 2.9 months, P < .001), and also had higher rates of reoperation and hardware removal (P < .05). Lastly, all cost variables were lower for high-volume surgeons (P < .05).

Conclusion:

In this single-center study, we found that patients treated by LV surgeons took 30% longer to heal radiographically and had greater reoperation rates than those treated by HV surgeons. Additionally, patients treated by high-volume surgeons had more anatomic postoperative radiographic ankle mortise reductions and was less cost-effective than when performed by high-volume surgeons.

Level of Evidence:

Level III, retrospective comparative study.

Platelet-Rich Plasma Versus Hyaluronic Acid for Hip Osteoarthritis Yields Similarly Beneficial Short-Term Clinical Outcomes: A Systematic Review and Meta-analysis of Level I and II Randomized Controlled Trials

PURPOSE

To systematically review the literature to compare the efficacy of platelet-rich plasma (PRP) and hyaluronic acid (HA) injections for the treatment of hip osteoarthritis (OA).

METHODS

A systematic review was performed by searching PubMed, the Cochrane Library, and Embase to identify randomized controlled trials that compared the clinical efficacy of PRP and HA injections for hip OA. The search phrase used was hip, osteoarthritis, platelet-rich plasma, hyaluronic acid, randomized. Patients were assessed based on the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), the Visual Analog Scale (VAS) for pain, and the Harris Hip Score (HHS). Subanalyses were performed for any outcome score in which ≥3 studies reported results.

RESULTS

Six studies (5 level I, 1 level II) met inclusion criteria, including 211 patients undergoing intra-articular injection with PRP (mean age 60.0 years, mean follow-up 12.2 months) and 197 patients with HA (mean age 62.3 years, mean follow-up 11.9 months). No significant differences were found in the weighted improvement of any outcome score (WOMAC, VAS, or HHS) from preinjection to postinjection between groups. When excluding a study with the highest risk of bias to eliminate heterogeneity, pooled subanalysis demonstrated no significant differences in WOMAC subscores between PRP and HA groups. Similarly, in a pooled subanalysis that isolated patients treated with leukocyte-poor PRP, no significant differences in WOMAC subscores were found between PRP and HA groups.

CONCLUSION

Patients undergoing treatment for hip OA with either PRP or HA injections can expect to experience similarly beneficial short-term clinical outcomes.

LEVEL OF EVIDENCE

II, systematic review of level I and II studies.

Established Trauma Triage Score Predicts Risk of Falling After Femoral Neck Fracture Arthroplasty Surgery

INTRODUCTION

The purpose of this study is to determine whether the Score for Trauma Triage in the Geriatric and Middle-Aged (STTGMA) patients is able to predict fall, fracture, periprosthetic fracture, or dislocation risk after femoral neck fracture arthroplasty surgery.

METHODS

Four hundred one patients who underwent hip arthroplasty surgery after a femoral neck fracture at one urban academic medical center were stratified into groups based on their risk scores assigned at femoral neck fracture presentation. The cohort was reviewed for the occurrence of postdischarge falls, secondary fractures, and prosthetic dislocations that resulted in a presentation to the emergency department (ED) after discharge from their hip fracture surgery. The incidence and timing of these complications after discharge were compared between the low-risk and high-risk groups.

RESULTS

The low-risk group included 201 patients, and the high-risk group included 200 patients. The high-risk group had significantly more postdischarge falls resulting in ED presentation (49 vs. 32, p = .035) that occurred significantly sooner (12.6 vs. 18.3 months, p = .034) after discharge.

CONCLUSIONS

The STTGMA model was able to successfully stratify patients who are at a higher risk of sustaining a fall after an arthroplasty procedure for a femoral neck fracture.

No change in outcome ten years following locking plate repair of displaced proximal humerus fractures

PURPOSE

To assess longer-term (> 5 years) function and outcome in patients treated with anatomic locking plates for proximal humerus fractures.

METHODS

This retrospective cohort study was conducted at an urban, academic level 1 trauma center and an orthopedic specialty hospital. Patients treated operatively for proximal humerus fractures with an anatomic locking plate by three orthopedic trauma surgeons and two shoulder surgeons from 2003 to 2015 were reviewed. Patient demographics and injury characteristics, disabilities of the arm, shoulder, and hand (DASH) scores, complications, secondary surgeries, and shoulder range of motion were compared at 1 year and at latest follow-up.

RESULTS

Seventy-five of 173 fractures were eligible for analysis. At a minimum 5 years and a mean of 10.0 ± 3.2 years following surgery, DASH scores did not differ from one-year compared to long-term follow-up (16.3 ± 17.4 vs. 15.1 ± 18.2, p = 0.555). Shoulder motion including: active forward flexion (145.5 vs. 151.5 degrees, p = 0.186), internal rotation (T10 vs. T9, p = 0.204), and external rotation measurements (48.4 vs. 57.9, p = 0.074) also did not differ from one year compared to long-term follow-up. By one year, all fractures had healed. After 1-year post-operatively, four patients underwent reoperation, but none for AVN or screw penetration.

CONCLUSIONS

Patient-reported functional outcome scores and shoulder range of motion are stable after one year following proximal humerus fracture fixation, and outcomes do not deteriorate thereafter. After one-year, long-term follow-up of fixed proximal humerus fractures may be unnecessary for those without symptoms.

Regional anesthesia for nonunion surgery with iliac crest bone grafting results in an increase in same day discharge

INTRODUCTION

The purpose of this study was to evaluate the outcomes of fracture nonunion repair with autogenous iliac crest bone graft (ICBG) under regional anesthesia alone or in combination with other techniques compared to other anesthesia techniques.

MATERIALS AND METHODS

Overall, 137 patients were identified who underwent ICBG as part of a repair of a long bone fracture nonunion between January 1, 2013 and October 1, 2020. Surgical and anesthetic records were reviewed to classify patients by anesthesia type. General, spinal, and regional anesthetics were used as either the primary anesthetic or as a combination of regional nerve block with general or spinal anesthesia.

RESULTS

Administration of regional anesthesia alone or in combination with general or spinal anesthesia (RA) and general or spinal anesthesia only (GS) groups differed in nonunion site distribution (p < 0.001). RA patients were discharged the same day more often than GS patients (30.9% vs 10.0%, p = 0.009) and experienced fewer postoperative complications (p = 0.021). The RA group achieved union sooner than the GS group (by 5.3 ± 3.2 months vs. by 6.8 ± 3.2 months, p = 0.006). Mean morphine equivalent dose was similar between groups (p = 0.23). Regional anesthesia use increased from 2013 to 2020, and same day discharge surgeries simultaneously increased over the same time period.

CONCLUSION

Regional anesthesia use increased in nonunion repair surgery with ICBG from 2013 to 2020. This was associated with an increase in same day discharge, sooner time to union, and decreased postoperative complications. There was not a need for increased opioid prescription in patients that underwent regional anesthesia.

The Efficacy and Safety of Tranexamic Acid Treatment in Orthopaedic Trauma Surgery

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Tranexamic acid (TXA) is a drug used to control hemorrhage by preventing the breakdown of fibrin.

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TXA is a cost-effective treatment for trauma patients across a variety of economic settings.

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Concerns of TXA causing thromboembolic events (TEEs) in orthopaedic trauma patients are not supported by evidence.

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TXA has been shown to reduce blood loss in hip fracture surgery.

The Basic Science Behind the Clinical Success of the Induced Membrane Technique for Critical-Sized Bone Defects

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The induced membrane technique (IMT) takes advantage of an osteoinductive environment that is created by the placement of a cement spacer into a bone defect.

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Most commonly, a polymethylmethacrylate (PMMA) spacer has been used, but spacers made from other materials have emerged and achieved good clinical outcomes.

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The IMT has demonstrated good results for long-bone repair; however, more research is required in order to optimize union rates as well as delineate more precise indications and surgical timing.

Outcomes following fracture fixation with the Equinoxe® proximal humerus plate: an improvement over PHILOS®?

INTRODUCTION

The purpose of this study is to compare patient outcomes between the Equinoxe® (Exactech, Gainesville, Fla) proximal humerus locking plate and the PHILOS® (Synthes, Paoli, PA) proximal humerus locking plate.

METHODS

Two hundred and seventy-one patients with a displaced proximal humerus fracture presented to our academic medical center between February 2003 and October 2020. Functional outcomes assessed included the Disabilities of the Arm, Shoulder, and Hand questionnaire and shoulder range of motion. Radiographs were utilized to determine fracture healing and development of posttraumatic osteoarthritis or osteonecrosis.

RESULTS

Overall, 108 Equinoxe® and 87 PHILOS® patients treated by a single surgeon with complete clinical, functional, and radiographic follow-up were included in the study. Demographics were similar between groups. One hundred and eight Equinoxe® patients healed at a mean time to union by 3.7 ± 2.2 months, and 86 PHILOS® patients healed (p = 0.24) by 4.1 ± 2.3 months after surgery (p = 0.31). Shoulder external rotation was greater in Equinoxe® patients by 7 degrees (p = 0.044), and forward elevation was greater by 16 degrees (p = 0.005) at one-year follow-up. DASH scores were similar between patients at the 3-, 6-, and 12-month follow-up (p = 0.86, p = 0.77, p = 0.64). Fewer Equinoxe® patients experienced complications (p = 0.043).

CONCLUSION

Fixation of a proximal humerus fracture can safely be performed with both Equinoxe® and PHILOS® proximal humerus locking plates. Patients fixed with Equinoxe® plates achieved a slightly greater degree of external rotation, forward elevation, and experienced fewer complications. This difference may be due to surgeon experience rather than the implant itself.

The Anterolateral Ligament of the Knee: An Updated Systematic Review of Anatomy, Biomechanics, and Clinical Outcomes

PURPOSE

To perform an updated systematic review of the anatomy, biomechanics, function of the anterolateral ligament (ALL), and the clinical outcomes of anterolateral ligament reconstruction (ALLR) when performed in conjunction with anterior cruciate ligament reconstruction (ACLR).

METHODS

A systematic search of the literature was performed by searching PubMed, the Cochrane Library, and Embase with the search phrase anterolateral ligament for articles published from February 2017 to May 2020. Inclusion criteria included studies that evaluated the anatomy, function, or biomechanics of the ALL; surgical technique articles on ALLR; clinical articles reporting outcomes of ALLR; studies published in English; and full-text articles. Exclusion criteria included studies published before February 2017. A subjective synthesis was performed, in which ranges were reported, and individual study data were presented in forest plots.

RESULTS

Overall, 40 articles were included in this systematic review, with 11 articles describing ALL anatomy, 14 articles analyzing ALL function and biomechanics, 7 articles discussing the surgical technique of combined ACLR and ALLR (ACLR/ALLR), and 8 articles describing the clinical outcomes of ACLR/ALLR. The addition of ALLR in combination with ACLR (ACLR+) results in lower graft failure rates for ACLR/ALLR (0.0%-15.7%) when compared with isolated ACLR (I-ACLR) patients (7.4%-21.7%). Three of 5 studies using the Subjective International Knee Documentation Committee score, 2 of 5 studies using the Lysholm score, and 1 of 2 studies using the Tegner score reported significantly better scores at latest follow-up among ACLR+ patients compared with I-ACLR (P < .05).

CONCLUSIONS

The ALL acts as a secondary stabilizer to the anterior cruciate ligament and helps resist internal knee rotation and anterior tibial translation. Based on the current literature, combined ACLR with ALLR may result in lower graft failure rates and improved patient-reported outcomes when compared with I-ACLR in patients with specific indications, although several studies have shown equivalent outcomes between these 2 cohorts.

CLINICAL RELEVANCE

The contents of this review provide great insight for orthopaedic surgeons who are performing ACLR and considering additional procedures to increase overall knee stability and decrease likeliness for re-rupture. The postoperative functional and clinical outcomes shown in patients undergoing ACLR+ compared with I-ACLR should be given proper consideration when evaluating available treatment courses.

Characteristics of Orthopaedic Sports Medicine Fellowship Directors

Background:

No study in the orthopaedic literature has analyzed the demographic characteristics or surgical training of sports medicine fellowship directors (FDs). Objective determinations as to what makes a physician qualified for this leadership position remain unclear; thus, it is important to identify these qualities as future physicians look to fill these roles.

Purpose:

To illustrate characteristics common among sports medicine FDs.

Study Design:

Cross-sectional study.

Methods:

The 2020 Accreditation Council for Graduate Medical Education Fellowship Directory was used to identify the FDs for all orthopaedic sports medicine fellowship programs in the United States. The characteristics and educational background data for FDs were gathered by 2 independent reviewers from up-to-date curricula vitarum, Web of Science, and institutional biographies and consolidated into 1 database. Data points gathered included age, sex, residency/fellowship training location and graduation year, name of current institution, length of time at current institution, time since training completion until being appointed FD, length of time in current FD role, and personal research H-index.

Results:

We identified 90 current orthopaedic sports medicine FDs. The mean Scopus H-index was 24.1 (median, 17). The mean age of FDs was 55.4 years; 87 of 90 (96.7%) were male and 3 (3.3%) were female; and 79/90 (87.8%) were White and 3/90 (3.3%) were African-American. The mean time to complete residency was 5.1 years (range, 5.0-6.0 years), and the most attended residency programs were the Hospital for Special Surgery (n = 9), the Harvard Combined Orthopaedic Residency Program (n = 5), and Duke University Medical Center (n = 4). The mean time required to complete a fellowship was 1.1 years (range, 1.0-2.0 years), and the fellowship programs that produced the most future FDs were the American Sports Medicine Institute (n = 11), the Steadman Hawkins Clinic (Vail) (n = 8), the Kerlan-Jobe Orthopaedic Clinic (n = 7), and the Hospital for Special Surgery (n = 7). The mean time from completion of fellowship to appointment as a FD was 12.8 years (range, 1-39 years).

Conclusion:

Women and minority groups are largely underrepresented among leadership positions in the field of orthopaedic sports medicine.

Augmentation of Meniscal Repair With Platelet-Rich Plasma: A Systematic Review of Comparative Studies

Background:

The effect of platelet-rich plasma (PRP) augmentation for meniscal repair (MR) is unclear, as current evidence is limited to small, mostly nonrandomized studies.

Purpose:

To systematically review the literature to evaluate the efficacy and safety of MR with PRP augmentation.

Study Design:

Systematic review; Level of evidence, 3.

Methods:

A systematic review was performed by searching PubMed, the Cochrane Library, and Embase to identify studies (level of evidence 1-3) that compared the clinical efficacy of MR performed with versus without PRP. The search phrase used was platelet-rich plasma meniscus. Patients were assessed based on the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), the visual analog scale (VAS) for pain, the Lysholm score, the Knee injury and Osteoarthritis Outcome Score (KOOS), the subjective International Knee Documentation Committee (IKDC) score, and treatment failure.

Results:

We identified 6 studies (2 studies with level 1 evidence; 4 studies with level 3 evidence) that met inclusion criteria, for a total of 309 patients undergoing MR with PRP (mean age, 31.9 years) and 445 patients without PRP augmentation (mean age, 29.6 years). The mean follow-up was 32.8 months (range, 12-72 months). Overall, 17.0% of PRP patients experienced MR failure compared with 22.1% of non-PRP patients. No differences in VAS, Lysholm, or subjective IKDC scores were found between groups except in 1 study, in which postoperative subjective IKDC scores were significantly better in the PRP group (P < .01). Another study found significantly better postoperative WOMAC scores among PRP patients, and 2 studies found significantly better KOOS subscores among PRP patients.

Conclusion:

There are a limited number of high-quality studies comparing outcomes and healing rates between patients undergoing MR with versus without PRP augmentation. Based on the available evidence, patients undergoing MR with PRP augmentation experience similar clinical outcomes at midterm follow-up when compared with conventional MR, and additional studies are needed to determine the efficacy of MR augmented with PRP.

Prevention of Cutibacterium acnes infection in arthroscopic shoulder surgery: a systematic review

BACKGROUND

Cutibacterium acnes is a gram-positive anaerobe that can lead to postoperative shoulder infections. The purpose of this study was to determine the incidence of C acnes infections following shoulder arthroscopy and evaluate the efficacy of perioperative antibiotic prophylaxis in the prevention of these infections.

METHODS

A systematic review was performed by searching PubMed, the Cochrane Library, and Embase to identify studies that evaluated the prevalence and clinical indications of C acnes infections after various arthroscopic shoulder surgical procedures. Patients were assessed based on positive culture rates, the contraction of infection, and antibiotic regimens used to prevent infection.

RESULTS

A total of 9 studies (1 level I, 5 level II, 1 level III, and 2 level IV) met the inclusion criteria, including a total of 3758 patients with a mean age of 59.9 years (range, 17-87 years) at the time of surgery. The mean follow-up time was 1.6 months (range, 1.0-12.0 months). Overall, 37.3% of patients (173 of 464) had positive C acnes skin and/or joint culture results, and in 0.22% of patients (8 of 3586), a C acnes infection was diagnosed postoperatively. The application of a topical benzoyl peroxide antibiotic in the days leading up to surgery significantly reduced the positive culture rate from 41.6% to 9.6% (P < .001).

CONCLUSIONS

C acnes infections occur at a very low rate (0.22%) following shoulder arthroscopy. The application of a topical benzoyl peroxide antibiotic in the days leading up to surgery in combination with preoperative antibiotic prophylaxis significantly reduces the prevalence of C acnes in shoulder arthroscopy patients.