Mason type III radial head fractures treated by anatomic radial head arthroplasty: Is this a safe treatment option?

Clinical and functional outcomes of plate and screw osteosynthesis in mason type III and IV radial head fractures in the absence of a radial head prosthesis

INTRODUCTION

Radial head and neck fractures represent a significant portion of elbow fractures in adults, particularly affecting younger patients due to falls onto outstretched hands. Surgical treatment is often necessary for displaced and comminuted fractures, especially those with associated ligamentous injuries. This study evaluates the long-term clinical, functional, and radiological outcomes of patients with Mason type III and IV radial head fractures managed through open reduction and internal fixation using plate and screw osteosynthesis, due to the unavailability of radial head prostheses.

MATERIAL AND METHOD

We retrospectively analyzed 28 patients with Mason type III or IV radial head fractures treated with open reduction and internal fixation (ORIF) between 2020 and 2024. Clinical assessments included the visual analog scale (VAS) for pain, Mayo Elbow Performance (MEP) Score, and Quick Disabilities of the Arm, Shoulder and Hand (Quick-DASH) score, as well as measurements of elbow flexion, extension, supination, and pronation. Radiographic evaluations assessed fracture union, loss of reduction, implant breakage or loosening, avascular necrosis, radiographic arthritis, and heterotopic ossification.

RESULTS

At a mean follow-up of 29.1 ± 20.1 months in 28 patients (16 M/12F; mean age 48.5 ± 12.6 years), mean elbow flexion was 120.4 ± 14.7, extension loss 10 ± 5.9, supination 68.9 ± 8.8°, and pronation 62.8 ± 7.1°, with mean VAS 2.3 ± 1.1, MEP Score 83.0 ± 8.9, and Quick-DASH 12.8 ± 7.6. Complete fracture union was achieved in 25 cases, partial union in 2, and asymptomatic nonunion in 1. Complications occurred in three patients (10%), including implant loosening, loss of reduction, heterotopic ossification, and avascular necrosis; two patients showed post-traumatic degenerative changes. One patient required K-wire removal due to migration and another underwent revision fixation with iliac crest bone graft for screw loosening/nonunion. No cases needed open arthrolysis or secondary radial head resection.

CONCLUSION

While osteosynthesis is effective in managing Mason type III and IV radial head fractures, having a radial head prosthesis available in the operating room can provide flexibility, especially in comminuted fractures, and potentially reduce the need for revision surgeries. These findings underscore the importance of adaptable surgical planning to improve outcomes in complex radial head fractures.

Comminuted Mason III/IV Radial Head Fractures: What Is the Best Treatment Between Prosthesis and Radial Head Resection? A Systematic Review and Meta-Analysis

Background/Objectives: Various surgical methods have been proposed for the treatment of comminuted Mason III/IV radial head fractures. In particular, the advantages and disadvantages between prosthesis implantation (RHA) or radial head resection (RHR) are not sufficiently quantified in the current literature. Methods: A systematic literature search was conducted using PubMed Web of Science, Cochrane Library, and Embase in February 2024. Studies conducted on patients with Mason type III or IV radial head fractures and studies relating to surgical methods, including radial head resection or Radial head prosthesis implantation, were included. The two methods were evaluated in terms of clinical and functional results through the DASH score (Disability of the arm, shoulder, and hand), Mayo Elbow Performance Index (MEPI), and flexion-extension range of motion. The onset of osteoarthritis and complications were also assessed. Risk of bias and quality of evidence were assessed using Cochrane guidelines. Results: A total of 345 articles were evaluated and, of these, 21 were included in the study for a total of 552 patients. The results of the meta-analysis showed no significant differences in favor of RHA or RHR in terms of Mayo Elbow Performance (p = 0.58), degrees of flexion (p = 0.689), degrees of extension deficit (p = 0.697), and overall incidence of complications (p = 0.389), while it highlighted a statistically significant difference in terms of DASH score (19.2 vs. 16.2, respectively; p = 0.008) and subjects who developed osteoarthritis (13.4% vs. 47.3%, respectively; p = 0.046). Conclusions: The results of this meta-analysis confirm that both surgical methods provide good functional outcomes, with no significant differences in MEPI, DASH, and range of motion. However, a higher incidence of post-traumatic osteoarthritis was observed in patients undergoing RHR. Additionally, RHR patients exhibited slightly worse functional outcomes in the DASH score; however, this difference is not substantial enough to be considered clinically significant. These findings suggest that while both techniques are viable, RHA may be preferable in patients at higher risk of joint degeneration and instability, and the choice of treatment should be tailored to individual patient characteristics.

Plate or Arthroplasty for complex Mason Type-III Radial Head Fractures? Mid-to-long term results from a blinded outcome assessor study

BACKGROUND

The surgical treatment of radial head fractures like Mason type III comminuted radial head fractures is challenging and controversial. Whether to use open reduction and internal fixation (ORIF) or radial head arthroplasty (RHA) as treatment methods is under constant debate.

METHODS

We retrospectively analyzed clinical and radiographic mid- to long-term results of 42 patients with a mean follow-up time of 4.56 years (1.92-7.58 years). Patients were grouped according to fragment numbers and the type of intervention performed (3-4 fragments vs. 4+ fragments; ORIF vs. RHA). At the final follow-up, range of motion (ROM), functional rating scores and subjective pain and function levels were documented by a blinded outcome assessor.

RESULTS

Although minor differences in the mean values were detected when comparing the results of the functional scores, ROM and subjective pain and function levels, only the movement in pronation and supination direction yielded statistically better results in the group of 4+-fragments for the RHA compared to ORIF. However, the 33 % rate of required implant removal amongst the ORIF group should be considered.

CONCLUSIONS

This study provides evidence that 3- and 4-part Mason type III fractures are prone to plate osteosynthesis. In contrast, greater than 4-part fractures can more reliably be treated by replacement. This leads to a proposed increase in fragment numbers to four, where ORIF most likely leads to good clinical results. However, in patients with 4+ fragment patterns, ORIF did not show statistically significantly worse results concerning the collected clinical values. This study supports the use of the ORIF approach to save the radial head.

Outcomes of press-fit radial head arthroplasty in unconstructable radial head fractures with associated elbow injuries: An average 5-year follow up

Aims

Unstable and nonreconstructable radial head fractures require radial head arthroplasty (RHA) to restore stability. Multiple implant designs are available with varying survival rates (76 to 97%). There is concern that loosening of the press-fit stems leads to implant failure. We review our outcomes using the Acumed press-fit prosthesis for trauma.

Methods

Between February 2008 and November 2020, all primary RHA for trauma from a single-centre were reviewed. Primary outcome was implant survivorship. Secondary outcome were clinical, radiographic and patient related outcome measures.

Results

In total, 96 cases were included. Seven revisions were recorded, all within 24-months of implantation. Kaplan-Meier estimated 10-year survival was 92.1% (95% confidence interval (CI) 84.0-96.1%). Median follow-up time was 5.7 years (Interquartile range (IQR) 3.2-8.5 years). Median Oxford Elbow Score was 43 (IQR 29-46) for and median Mayo Elbow Performance Score was 90 (IQR 72-100). 72% were able to fully-return to pre-injury activities. Radiographic analysis identified osteolysis around radial neck (48%), loosening (32%), valgus stem position (20%), heterotopic ossification (16%) and capitellar erosion (15%). No radiological findings were associated with long-term poor clinical outcomes.

Conclusion

Our study demonstrates an excellent survival of press-fit RHA of 92.1% at 10-years. No radiographic features on follow-up were associated with poorer patient recorded outcome measures.

Operative treatment of Mason Type III radial head fractures - A comparative analysis using PROMIS

Objectives

The purpose of this study is to evaluate the outcomes of operatively treated Mason Type III radial head fractures. Additionally, this project seeks to assess efficacy of PROMIS in evaluating post-operative outcomes for this patient population.

Methods

A total of 143 patients who underwent operative treated Mason Type III radial head fractures were analyzed retrospectively. PROMIS physical function (PF), PROMIS upper extremity (UE), PROMIS pain interference (PI), demographic variables, and range of motion were collected and analyzed over 12-month follow-up.

Results

Radial head arthroplasty (RHA) was performed on 89 patients, open reduction and internal fixation (ORIF) was performed on 47 patients, and radial head excision was performed on 7 patients. Among the RHA patients, PROMIS PF, PI and UE demonstrated a change of -1.33 (p < 0.05), -1.48 (p < 0.05), and 2.23 (p < 0.05) respectively from injury to 12-months. Among the ORIF patients, PROMIS PF, PI and UE demonstrated a change of 3.22 (p < 0.05), -1.56 (p < 0.05), and 2.09 (p < 0.05) respectively from injury to 12-months. At the pre-operative and 12-month visits, the RHA group demonstrated lower PROMIS PF scores 34.75 vs 38.02 (p < 0.05) and 33.42 vs 41.24 (p < 0.05) respectively. Ther was no difference in PROMIS PI, UE, or elbow range of motion between the two groups at 6- or 12-month follow-up (p > 0.05).

Conclusion

Comparing the RHA and ORIF groups, there was no difference in PROMIS PI or UE scores nor was there a clinically significant improvement at the 6- or 12-month mark. The ORIF group demonstrated improved PROMIS PF at all follow-up periods and did show a clinically significant improvement. Patient Acceptable Symptom State (PASS) correlated only with PROMIS UE at 6- and 12- months for both groups.

Radial head replacement with the 3D-printed patient-specific titanium prosthesis: Preliminary results of a multi-centric prospective study

PURPOSE

To report preliminary clinical results and safety of 3D-printed patient-specific titanium radial head (RH) prosthesis in treatment of the irreparable RH fractures.

MATERIAL AND METHODS

This multi-centric prospective study included 10 patients (6 men and four women, mean age 41 years (range, 25-64 years)). Three cases were classified as Mason type III and 7 cases as type IV. Patients were assessed preoperatively, intraoperatively, and at 1, 6, 12, 24, 36, and 48 weeks postoperatively. Range of motion (ROM), visual analog scale (VAS) score, Disabilities of the Arm, Shoulder and Hand (DASH) score, Mayo Elbow Performance Score (MEPS), radiology imaging, and laboratory blood and urine testing were evaluated.

RESULTS

The prostheses were implanted utilizing cemented stems in 5 patients and cementless stems in 5 patients. Intraoperatively, well congruency of a prosthesis with capitellum and radial notch of ulna was observed in all cases. All patients had improvement of ROM, VAS score, DASH score, and MEPS during the postoperative follow-ups. At the final follow-up, mean elbow extension was 6.5° (range, 0°-30°), flexion 145° (range, 125°-150°), supination 79° (range, 70°-80°), and pronation 73.5° (range, 45°-80°). Mean VAS score was 0.3 (range, 0-3), DASH score was 12.35 (range, 1.7-23.3), and MEPS was 99.5 (range, 95-100). Postoperative radiographs demonstrated heterotopic ossification in 2 cases, periprosthetic radiolucency in 2 cases, and proximal radial neck resorption in 2 cases. No one had the evidence of capitellar erosion, implant failure, malpositioning, overstuffing, or symptomatic stem loosening. There was no significant alteration of laboratory results or adverse events related to the 3D-printed prosthesis implantation.

CONCLUSION

The preliminary results demonstrated that implantation of the 3D-printed patient-specific titanium RH prosthesis is safe and may be a potential treatment option for irreparable RH fracture.

Radial head replacement for acute complex elbow instability: a long-term comparative cohort study of 2 implant designs

BACKGROUND

Radial head fractures not amenable to reconstruction should be treated by radial head replacement (RHR) when there is associated elbow or forearm instability. There are multiple RHR designs with different philosophies, but 2 of the most commonly used implants include the anatomic press-fit radial head system and the loose-fit metallic spacer. There is little information available specifically comparing the long-term clinical and radiographic outcomes of these 2 systems. The objective of this study was to compare the long-term clinical and radiologic outcomes of 2 RHR designs in the context of complex acute elbow instability.

MATERIALS AND METHODS

Ninety-five patients with an average age of 54 years (range, 21-87 years) underwent an acute RHR (46 press-fit Acumed anatomic and 49 loose-fit Evolve metallic spacer) and were prospectively followed for an average of 61 months (range, 24-157 months). There were 34 terrible triads; 36 isolated RH fractures with medial, lateral, or longitudinal instability; and 25 RH fractures associated with a proximal ulnar fracture. Clinical outcome and disability were evaluated with the Mayo Elbow Performance Score (MEPS), the Oxford Elbow Score, and the Disabilities of the Arm, Shoulder, and Hand (DASH) score. Pain and satisfaction were assessed using a visual analog scale. Radiographic analysis included presence of loosening, bone loss, and overstuffing related to the RHR.

RESULTS

Eight patients with an anatomic RHR (2 with overstuffing, 3 for stiffness, and 3 with loose implants) and 1 patient with a spacer (with stiffness) required implant removal. There were no significant differences between spacer RHR and anatomic RHR in arc of motion (120° vs. 113°, P = .14), pain relief (1 vs. 1.7, P = .135), MEPS (94 vs. 88; P = .07), Oxford Elbow Score (42.3 vs. 42.2, P = .4), or DASH score (12.2 vs. 14.4, P = .5). However, patients with a spacer RHR were significantly more satisfied (9 vs. 7.7; P = .004) than those with an anatomic implant. Radiographically, 19 anatomic implants had significant proximal bone loss and 10 showed complete lucent lines around the stem. Lucent lines were common around the spacer RHR. These radiographic changes were not always related to worse clinical outcomes.

CONCLUSION

Both the anatomic and spacer RHR designs can provide good clinical long-term outcomes. However, patients with a spacer showed a higher degree of satisfaction and those with an anatomic press-fit RHR had a higher revision rate, with radiographic changes that warrant continued follow-up.

Prognostic Factors of Function in Nonoperatively Treated Radial Head Fractures: A Prospective Cohort Study

OBJECTIVES

To identify patient-related factors and fracture characteristics influencing the functional outcomes of nonoperatively treated radial head fractures and to determine function at 1 year.

DESIGN

Prospective cohort study.

SETTING

Academic Level 1 trauma center.

PATIENTS/PARTICIPANTS

Consecutive isolated radial head fractures fitting the inclusion criteria between May 2013 and July 2016.

INTERVENTION

Nonoperative treatment of isolated radial head fractures.

OUTCOME MEASUREMENTS

Logistic regressions between potential prognostic factors and function assessed with the Mayo Elbow Performance Score (MEPS), the Disabilities of the Arm, Shoulder, and Hand (DASH) score, and range of motion at 1.5-3-6-12 months.

RESULTS

One hundred fourteen patients were included (78% Mason I [OTA/AO 2R1B1], 20% Mason II [OTA/AO 2R1B3], and 2% Mason III [OTA/AO 2R1C3]). Mean MEPS and DASH score at the last follow-up were excellent [96.4 ± 7.6 and 3.7 ± 8.6] with, respectively, 79.8% and 92.7% of satisfactory results. Depressive symptoms at injury baseline (Quick Inventory of Depressive Symptomatology > 5) are a constant predictor of unsatisfactory function (MEPS <90 or DASH >17]). Older age and female sex were all linked to worse function at the first follow-ups ( P < 0.05), whereas lower socioeconomic class and receiving financial compensations were associated to unsatisfactory function at 1 year ( P < 0.05).

CONCLUSIONS

Although most nonoperatively treated radial head fractures heal with excellent function, some patients still exhibit unsatisfactory results at 1 year. Symptoms of depression at injury baseline are a constant and significant predictor of unsatisfactory function. Early detection of depressive symptoms would allow for interventions that may optimize function.

LEVEL OF EVIDENCE

Prognostic Level II. See Instructions for Authors for a complete description of levels of evidence.

Anatomic Monopolar Press-fit Radial Head Arthroplasty; High Rate of Loosening at Mid-Term Follow Up

Introduction

Radial head arthroplasty (RHA) is used for the management of unstable or unreconstructable injuries of the radial head. Our aim was to investigate clinical and radiographic outcomes in patients treated with the Acumed anatomic radial head press-fit system for trauma.

Methods

Clinical and radiographic assessment of RHAs undertaken for trauma with minimum 2-year follow-up.

Results

16 consecutive patients, mean age 53 (21-82) and 66 month ± 27 (26-122) clinical follow-up were included. There were marked radiographic changes with 11/16 showing periprosthetic lucent lines and 13/16 showing subcollar osteolysis. Radiographic changes occurred early post-surgery. Stem loosening was associated with larger cantilever quotients (0.47 vs 0.38, p  =  0.004). Overall survivability was 81.2%, with 3 RHAs removed. Clinical outcomes for the retained RHAs were acceptable with mean flexion 134°, extension deficit of 10°, pronation of 82°, and supination of 73°. Mean VAS scores were 8.5 ±  14.4, QuickDASH 13.8 ±  18.9, Mayo Elbow Performance Scores were 91.5 ±  12.5 with no poor scores.

Conclusion

Mid-term clinical functional outcomes following the Acumed anatomic RHA are acceptable in most cases. However, in view of the extensive periprosthetic lucencies and surgical removal due to loosening, patients should be cautioned when consented for implantation of the prosthesis, especially if a large collar is anticipated.

After failed radial head arthroplasty, what are the options? Risk factors and results of revisions in a multicenter study

Introduction

Few multicenter studies have analyzed the outcome of revision surgery of radial head arthroplasties (RHA) in the medium term follow up. The objective is twofold: to determine the factors associated with revision of RHAs and to analyze the results of revision with 2 surgical techniques: isolated removal of the RHA or revision with a new RHA (R-RHA).

Hypothesis

There are associated factors of RHA revision and RHA revision results in satisfactory clinical and functional outcomes.

Methods

Twenty-eight patients were included in this multicenter retrospective study, with all surgical indications for initial RHA being traumatic/post-traumatic. The mean age was 47 ± 13 years with a mean follow-up of 70 ± 48 months. This series included two groups: the isolated RHA removal group (n = 17) and the revision RHA with new radial head prosthesis (R-RHA) group (n = 11). Evaluation was clinical and radiological with univariate and multivariate analysis.

Results

Two factors associated with RHA revision were identified: a pre-existing capitellar lesion (p = 0.047) and a RHA placed for a secondary indication (<0.001). Revision for all 28 patients resulted in improved pain (pre-op Visual Analog Scale 4.7 ± 3 vs. post-op 1.57 ± 2.2, p < 0.001), mobilities (pre-op flexion 118 ± 20 vs. post-op 130 ± 13, p = 0.03; pre-op extension -30 ± 21 vs post-op -20 ± 15, p = 0.025; pre-op pronation 59 ± 12 vs post-op 72 ± 17, p = 0.04; pre-op supination 48 ± 2 vs post-op 65 ± 22, p = 0.027) and functional scores. Mobility and pain control were, for stable elbows, satisfactory in the isolated removal group. When the initial or revision indication was instability, the DASH (Disabilities of the Arm, Shoulder and Hand = 10 ± 5) and MEPS (Mayo Elbow Performance score = 85 ± 16) scores were satisfactory in the R-RHA group.

Discussion

In the case of a radial head fracture, RHA is a satisfactory first-line solution without pre-existing capitellar injury, its results being much weaker in the case of ORIF failure and fracture sequelae. In case of RHA revision, isolated removal or R-RHA adapted according to the pre-operative radio-clinical exam.

Level of evidence

IV.

The comparative performance of radial head prostheses in patients younger than and older than 50 years: a systematic review

Background

Patient age may play a role in the surgeon's decision between radial head arthroplasty (RHA) and open reduction internal fixation in radial head fracture treatment. Though large sample reports have detailed outcomes of radial head replacement for a mean age younger than 50 years, the age ranges are widely distributed. Patient outcomes are not uniform across a broad age distribution. Therefore, treatment decisions should be evaluated within the confines of a narrower age bracket. An understanding of clinical outcomes for radial head replacement in younger adults will provide value for guiding treatment decisions. We performed a systematic review comparing the clinical outcomes for radial head replacement in patients younger and older than 50 years of age. Further analysis compared outcomes between RHA performed as a primary procedure and as a secondary procedure in patients younger and older than 50 years of age.

Methods

PubMed was queried for articles which delineated individual patient data for age, surgical treatment, and appropriate outcome metrics. Articles were grouped based on patient age of under 50 and over 50 years and within those age groups, based on the arthroplasty being performed as a primary or as a secondary procedure.

Results

There were no significant differences between the under 50 and the over 50 groups for Mayo Elbow Performance Score (P = .79) and for implant revision/removal (P = .32). In the under 50 group, RHA done as a primary procedure had significantly higher (P = .001) mean Mayo Elbow Performance Score than RHA done as a secondary procedure. In the over 50 group, relative risk was 2.39 (95% confidence interval, 2.12-2.69) for implant revision/removal (P = .11) when comparing primary and secondary procedures.

Discussion

At a mean follow-up of 48 months, RHA in patients under the age of 50 years had satisfactory outcomes which were comparable to outcomes in patients over the age of 50 years. Across both age groups, arthroplasty performed as a primary procedure demonstrated superior outcomes compared to arthroplasty performed as a secondary procedure. Our findings provide guidance to surgeons who face a multifaceted decision when encountering younger adult patients with radial head fracture patterns that may not be amenable to fixation. Awareness of the age-specific performance of radial head implants is an important component of the decision for surgical treatment.

Survivorship of anatomic press-fit short-stem radial head replacement with a pyrocarbon bearing

BACKGROUND

Restoring the radial head as a stabiliser of the elbow is considered important in cases where there is an associated bony or ligamentous injury. A variety of radial head prostheses are available. There are no reports of the survivorship of a short-stem press-fit radial head prostheses with pyrocarbon bearing.

PATIENTS AND METHODS

With institutional review board approval, a retrospective case-note analysis was performed of a consecutive single-surgeon case series of the Integra LifeScience pyrocarbon radial head prostheses (Carbon Modular Radial Head) from October 2010 to October 2019 in a tertiary referral centre. The series was divided into acute trauma and salvage cohorts. Kaplan-Meier survivorship analysis was conducted.

RESULTS

36 patients were included, 23 (64%) for acute injuries and 13 (36%) for failed initial treatment. Of the acute injuries, 20 (87%) had a Wrightington type-C elbow fracture-dislocation. Reoperation was performed in 4 (11%) patients; 10 (28%) had possible loosening on radiographs. The implant survival rate was 94% at shortest follow-up of 17 months (mean 70 months).

DISCUSSION

Treatment of complex radial head fractures using a pyrocarbon-bearing, anatomic press-fit design provides satisfactory short-term survivorship in this case series. The implant should be used with caution in salvage cases, due to higher rates of loosening seen in this cohort.

Does Radial Head Resection Impair Hand and Wrist Function? A Long-Term Follow-Up

OBJECTIVE

To evaluate the long-term outcome in patients after radial head resection surgery for isolated Mason type III radial head fractures.

DESIGN

An observational retrospective case series.

SETTING

A Hand and Upper-Extremity Surgery Unit in a tertiary care center.

PATIENTS

Data were collected from files of patients who were operated between the years 1980 and 2020. Of 352 patients who underwent surgery for radial head fractures, 25 patients were eligible and were enrolled in the study.

INTERVENTION

All participants underwent radial head resection surgery and a follow-up clinical and radiographic evaluation by 2 senior orthopaedic surgeons.

OUTCOME MEASUREMENTS

Objective evaluation included active range of motion of the elbow and wrist joints, ulnohumeral angle, key pinch and grip measurements, and radiographic imaging of elbow and wrist joints. Subjective evaluation included visual analog scale measurements, disability of arm shoulder and hand questionnaire, Mayo wrist score, Michigan hand outcome, and Oxford elbow score.

RESULTS

The mean follow-up was 18 years. Mean elbow range of motion and mean grip strength were lower in the operated hand, as compared to the contralateral hand. Mean proximal radial migration was 1.6 mm. Mean results of visual analog scale, disability of arm shoulder and hand, Mayo wrist score, Michigan hand outcome, and Oxford elbow score indicated good functional outcome and high patient satisfaction.

CONCLUSIONS

In our study population, long-term functional outcomes after radial head resection were encouraging. Thus, this procedure may be considered as a surgical alternative when radial head reconstruction or replacement fails.

LEVEL OF EVIDENCE

Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Comparing Options for Heterotopic Ossification Prophylaxis following Elbow Trauma: A Systematic Review and Meta-Analysis

Introduction  Heterotopic ossification (HO) can be a potentially serious and devastating complication following traumatic injury to the elbow. HO prophylaxis options include nonsteroidal anti-inflammatory drugs (NSAIDs) and radiation therapy (RT) but neither has been proven more effective. The purpose of this review is to compare effectiveness and outcomes between NSAID and RT prophylaxis for HO about the elbow following a traumatic injury. Materials and Methods  We performed a systematic review of PubMed and Cochrane Library for cases of HO prophylaxis following elbow trauma utilizing PRISMA guidelines to determine the most effective form of prophylaxis. Outcomes of interest included recurrence of HO, range of motion (ROM), and Mayo elbow performance index (MEPI). A total of 36 articles and 826 elbows of which 203 received RT and 623 received NSAID were identified and included in the final analysis. Results  Rates of HO formation or recurrence following elbow trauma were similar between radiation and NSAID prophylaxis (15.6% vs. 22.2%, respectively p = 0.457). ROM was similar in flexion and extension arc (109.0 degrees in radiation vs. 112.8 in NSAIDs, p = 0.459) and in pronation and supination arc (118.9 degrees radiation vs. 134.7 degrees NSAIDs, p = 0.322). MEPI scores were 79.19 in the radiation group and 88.82 in the NSAIDs group at the final follow-up. Conclusion  There is no statistical difference in HO development, recurrence, or final ROM between NSAIDs and RT prophylaxis following trauma to the elbow. We recommend the choice of modality based on patient characteristics, cost, and surgeon preference. Level of Evidence  Level III.

Clinical outcomes after internal fixation, arthroplasty and resection for treatment of comminuted radial head fractures: a systematic review and network meta-analysis

BACKGROUND

Radial head fractures make up approximately 3% of all fractures, and they are the most common elbow fracture in adults. The treatment for comminuted radial head fracture remains controversial. This systematic review was conducted with the aim to compare postoperative outcomes among surgical treatments to identify which method is the best for comminuted radial head fractures.

METHODS

Relevant studies were identified from Medline and Scopus from inception to February 22, 2020, that reported Mayo Elbow Performance Index (MEPI) score and postoperative complications of either treatment. A network meta-analysis was applied to assess treatment outcomes. Probability of being the best treatment was estimated using surface under the cumulative ranking curves (SUCRA).

RESULTS

Twelve comparative studies and one randomized controlled trial (N = 526 patients) met the inclusion criteria. Interventions included open reduction and internal fixation (ORIF) (N = 210 patient), radial head arthroplasty (RHA) (N = 227 patients) and radial head resection (RHR) (N = 152 patients). A network meta-analysis showed that the MEPI of RHA was significantly higher when compared to ORIF and RHR, with a pooled mean MEPI of 7.28 (1.69, 12.86) and - 7.32 (- 13.21, - 1.43), respectively. In terms of complications, RHA and RHR had lower risk with RRs of 0.61 (0.29, 1.31) and 0.54 (0.24, 1.25) when compared to ORIF. The SUCRA probabilities of RHA and RHR were in the first rank with 99.2% in MEPI and 60.6% in complications, respectively.

CONCLUSIONS

This study suggests that RHA is the best treatment of choice for efficacy and safety in the treatment of comminuted radial head fracture, while RHR is the safest choice to minimize postoperative complications and enable patients to perform all daily life activities.

Midterm outcomes of 146 EVOLVE Proline modular radial head prostheses: a systematic review

INTRODUCTION

The EVOLVE implant (Wright Medical Technology, Arlington, TN, USA) is a modular loose-fitting radial head prosthesis. The primary objective was to synthesize all available literature investigating the midterm clinical outcomes of the EVOLVE implant.

MATERIALS AND METHODS

An electronic literature search in Pubmed/Medline, Scopus, EMBASE, and Cochrane library was performed querying for studies published in 2000-2017. Articles describing clinical and radiographical outcomes as well as reoperation were included. Outcomes of interest included range of motion, Mayo Elbow Performance Score, Disabilities of the Arm Shoulder and Hand, radiographic outcome, and reason for reoperation.

RESULTS

A total of five articles consisting of 146 patients with EVOLVE implants were included. Mean patient age was 57.4 years (range 22-84), and 43.8% were males (n = 64). Mean follow-up was 4.8 years (range 1-14). Mean Mayo Elbow Performance Score and Disabilities of the Arm Shoulder and Hand score were 87.6 (range 30-100) and 18.9 (range 0-82), respectively. Midterm clinical results were good or excellent (Mayo Elbow Performance Score > 74) in 94 patients. Reoperation was observed in 12 patients, with implant revision required in 2 patients. The primary reason for reoperation was persistent stiffness (n = 9).

CONCLUSION

Midterm outcomes of EVOLVE radial head prosthesis are satisfactory, and associated complication rates are low. Loose-fit implant method appears to be a reliable approach to avoid failure of radial head prosthesis by painful loosening.

Heterotopic Ossification After Elbow Fractures

Heterotopic ossification (HO), a complication after surgical repair of elbow fractures, can result in pain, decreased range of motion, or complete ankylosis of the joint. This updated systematic review focused on compiling incidence and prevalence rates of HO after surgical repair of various types of elbow fractures. The overall incidence of HO after surgical repair was calculated to be 28.7%, a result comparable with rates in the literature. Further analysis suggested that the odds of having HO may be less after distal humerus fractures than after proximal radius fractures, terrible triad injuries, and elbow fractures/dislocations. [Orthopedics. 2021;44(1):10-16.].

Short- to mid-term outcomes of radial head replacement for complex radial head fractures

Background

The purpose of the current study was to investigate short- to mid-term outcomes and complications following radial head replacement (RHR) for complex radial head fractures and to identify factors associated with clinical outcomes.

Methods

Twenty-four patients with complex radial head fractures were treated by RHR. The mean age of the patients was 49.8 years (range, 19–73 years). Clinical and radiographic outcomes were evaluated for a mean follow-up period of 58.9 months (range, 27–163 months) using the visual analog scale (VAS) score for pain, the Mayo elbow performance score (MEPS), the quick disabilities of the arm, shoulder and hand (Quick-DASH) score, and serial plain radiographs. Complications were also evaluated.

Results

At the final follow-up, the mean VAS score, MEPS, and Quick-DASH score were 0.6±1.1, 88.7±11.5, and 19.4±7.8, respectively. The mean range of motion was 132.7° of flexion, 4.7° of extension, 76.2° of pronation, and 77.5° of supination. Periprosthetic lucency was observed in six patients (25%). Heterotopic ossification was observed in four patients (16.7%). Arthritic change of the elbow joint developed in seven patients (29.2%). Capitellar wear was found in five patients (20.8%). Arthritic change of the elbow joint was significantly correlated with MEPS (P=0.047). Four cases of complications (16.6%) were observed, including two cases of major complications (one stiffness with heterotopic ossification and progressive ulnar neuropathy and one stiffness) and two cases of minor complications (two transient ulnar neuropathy).

Conclusions

RHR for the treatment of complex radial head fractures yielded satisfactory short- to mid-term clinical outcomes, though radiographic complications were relatively high.

Neurologic complications after surgical management of complex elbow trauma requiring radial head replacement

BACKGROUND

Radial head arthroplasty (RHA) has become a successful procedure for addressing acute unreconstructible radial head fractures that compromise elbow stability in complex elbow trauma. The purpose of this study was to investigate the incidence of and risk factors for the development of neurologic complications after surgical treatment of complex elbow fractures that require an RHA.

METHODS

Sixty-two patients with an unreconstructible radial head fracture and complex elbow instability treated with RHA were included. There were 33 men and 29 women, with a mean age of 54 years (range, 22-87 years). The average follow-up period was 5.2 years (range, 3-16 years). All patients were neurologically intact before surgery. The arthroplasty was implanted through a Kocher approach in 55 cases, whereas a Kaplan approach was used in 7. An uncemented smooth stem arthroplasty (Evolve) was used in 27 patients, and an anatomic ingrowth system (Anatomic Radial Head), in 35. At the time of surgery, 23 patients underwent fixation of a coronoid fracture and 15 underwent plating of the proximal ulna. All patients were clinically examined immediately after surgery and during follow-up to detect any degree of neurologic deficit. Radial and ulnar nerve injuries were classified according to the Hirachi and McGowan classifications, respectively. Functional outcomes were evaluated with the Mayo Elbow Performance Score.

RESULTS

A complete posterior interosseous nerve palsy occurred postoperatively in 2 patients. Hand function had completely recovered in both at 2 months after surgery without sequelae. Nine patients complained of ulnar nerve symptoms (immediately after surgery in 6 and as delayed ulnar neuropathy in 3). Most patients with ulnar nerve deficits had undergone additional surgical procedures to address ulnar fractures. Among patients with ulnar neuropathies, only 3 complained of mild sensory symptoms at the latest follow-up. No significant differences in range of motion and Mayo Elbow Performance Score were found between patients with and without neurologic complications. Associated olecranon or coronoid fixation and a prolonged tourniquet time were identified as risk factors for neurologic complications.

CONCLUSION

This study shows that the incidence of neurologic complications associated with the surgical treatment of complex elbow fractures requiring implantation of a radial head prosthesis may be underestimated in the literature. Inappropriate retraction in the anterior aspect of the radial neck, a prolonged ischemia time, and concomitant coronoid or olecranon fracture fixation represent the main risk factors for the development of this complication. Although the great majority of patients have full recovery of their nerve function, they should be advised on the risk of this stressful complication.

Radial head fractures

The shape and size of the radial head is highly variable but correlates to the contralateral side. The radial head is a secondary stabilizer to valgus stress and provides lateral stability. The modified Mason-Hotchkiss classification is the most commonly used and describes three types, depending on the number of fragments and their displacement. Type 1 fractures are typically treated conservatively. Surgical reduction and fixation are recommended for type 2 fractures, if there is a mechanical block to motion. This can be done arthroscopically or open. Controversy exists for two-part fractures with >2 mm and <5 mm displacement, without a mechanical bloc as good results have been published with conservative treatment. Type 3 fractures are often treated with radial head replacement. Although radial head resection is also an option as long-term results have been shown to be favourable. Radial head arthroplasty is recommended in type 3 fractures with ligamentous injury or proximal ulna fractures. Failure of primary radial head replacement may be due to several factors. Identification of the cause of failure is essential. Failed radial head arthroplasty can be treated by implant removal alone, interposition arthroplasty, revision radial head replacement either as a single stage or two-stage procedure.

Comparison of bipolar and monopolar radial head prostheses in elbow fracture-dislocation

INTRODUCTION

The role of bipolar radial head prostheses (RHP) in elbow fracture-dislocation is controversial, with some reports of poorer stabilization than with monopolar designs. The aim of the present study was to compare mono- versus bi-polar RHPs in elbow fracture-dislocation. The study hypothesis was that mono- and bi-polar RHPs do not differ in clinical and radiological results, complications or revision rates.

MATERIAL AND METHODS

A single-center retrospective study included 58 patients, with a mean age of 55 years (range, 21-84 years). All received RHP for elbow dislocation with association: terrible triad, Monteggia fracture-dislocation, transolecranal dislocation or divergent dislocation. Two groups were compared: Mono-RHP, with monopolar prosthesis (n=40), and Bi-RHP, with bipolar prosthesis (n=18). All patients underwent clinical and radiological examination at last follow-up.

RESULTS

Mean follow-up was 42.7 months (range, 12-131 months). There were no significant (p>0.05) inter-group differences in range of motion or Mayo Elbow Performance Score. Mono- versus bi-polar design did not correlate with onset of complications (p=0.89), surgical revision (p=0.71), persistent or recurrent instability (p=0.59), or ulnohumeral (p=0.62) or capitulum (p=0.159) osteoarthritis at last follow-up.

DISCUSSION AND CONCLUSION

No differences were found between mono- and bi-polar RHPs in the treatment of elbow fracture-dislocation. Clinical and radiographic results were similar, as were complications and revision rates. The literature is inconclusive, reporting contradictory conclusions. We see no contraindications to bipolar RHPs in elbow dislocation with association, notably terrible triad injury.

LEVEL OF EVIDENCE

III, Retrospective case-control study.

Radial head arthroplasty: fixed-stem implants are not all equal-a systematic review and meta-analysis

Background

Numerous fixed-stem implants exist for radial head arthroplasty; therefore, we conducted a systematic review to compare the safety and efficacy of different types of fixed-stem implants.

Methods

We conducted a literature search, updated from a previous systematic review, to identify studies evaluating a fixed-stem radial head arthroplasty implant for any indication. We extracted data on revision rates, specific complications, and functional scores. We pooled results across studies using a random-effects method, using proportions for dichotomous data and mean values for functional scores. We analyzed outcomes by indication and specific implant.

Results

We included 31 studies. Studies included patients with radial head fractures only, terrible-triad injuries, or Essex-Lopresti injuries or included a heterogeneous population. We identified 15 different fixed-stem implants. The results of our analysis revealed that patients with terrible-triad injuries may be at an increased risk of revision and instability and patients with Essex-Lopresti injuries may be at an increased risk of arthritis, capitellar erosion, and osteolysis. After removing these outliers and pooling the results by specific device, we observed variability across devices in the rates of revision, arthritis, capitellar erosion, instability, and osteolysis, as well as in functional scores.

Conclusion

Differences were seen across different implants in revision rates, certain complications, and functional scores. This study highlighted that these devices should be evaluated within the context of the patient population under examination, as patients with Essex-Lopresti or terrible-triad injuries may demonstrate worse outcomes relative to those with a fracture only.

Factors affecting outcome of partial radial head fractures: A Retrospective Cohort Study

BACKGROUND

The purpose of this study is to evaluate which factors will affect range of motion (ROM) and function in partial radial head fractures. The hypothesis is that conservative treatment yields better outcomes.

MATERIALS AND METHODS

This retrospective comparative cohort study included 43 adult volunteers with partial radial head fracture, a minimum 1-year follow up, separated into a surgical and non-surgical group. Risk factors were: associated injury, heterotopic ossification, worker's compensation, and proximal radio ulnar joint (PRUJ) implication. Outcomes included radiographic ROM measurement, demographic data, and quality of life questionnaires (PREE, Q-DASH, MEPS).

RESULTS

Mean follow up was 3.5 years (1-7 years). Thirty patients (70%) had associated injuries with decreased elbow extension (-11°, p=0.004) and total ROM (-14°, p=0.002) compared to the other group. Heterotopic ossification was associated with decreased elbow flexion (-9.00°, p=0.001) and fractures involved the PRUJ in 88% of patients. Only worker's compensation was associated with worse scores. There was no difference in terms of function and outcome between patients treated non-surgically or surgically.

DISCUSSION

We found that associated injuries, worker's compensation and the presence of heterotopic ossification were the only factors correlated with a worse prognosis in this cohort of patients. Given these results, the authors reiterate the importance of being vigilant to associated injuries.

LEVEL OF EVIDENCE

IV, Retrospective study.

Use of surgical glue for Mason type III radial head fractures: A case report

RATIONALE

A Mason type III radial head fracture, which is characterized by comminuted fragments of the radial head, is a severe injury. Open reduction and internal fixation (ORIF) is an alternative treatment method; however, the technique of using an on-table reduction in combination with surgical glue is rarely reported.

PATIENT CONCERNS

A 48-year-old man was admitted to our department with complaints of elbow pain after falling down. Elbow radiography and computed tomography (CT) demonstrated characteristics of fractures before the operation.

DIAGNOSIS

Radiographic images showed a Mason type III radial head fracture.

INTERVENTIONS

The patient underwent ORIF at our hospital. During the operation, the technique of on-table reconstruction combined with surgical glue was used.

OUTCOMES

The patient recovered well and was able to participate in his usual work.

LESSONS

Mason type III radial head fractures could be treated with ORIF, and a satisfactory result could be anticipated, thus avoiding a radial head replacement or resection. Anatomical reduction of a comminuted radial head could be obtained via an on-table reconstruction and application of surgical glue.

Indirect 3D printing technology for the fabrication of customised β-TCP/chitosan scaffold with the shape of rabbit radial head-an in vitro study

Background

With the development of indirect three-dimensional (3D) printing technology, it is possible to customise individual scaffolds to be used in bone transplantation and regeneration. In addition, materials previously limited to the 3D printing (3DP) process due to their own characteristics can also be used well in indirect 3DP. In this study, customised β-TCP/chitosan scaffolds with the shape of rabbit radial head were produced by indirect 3D printing technology.

Methods

Swelling ability, porosity, mechanical characterisation, and degradation rate analysis were performed, and in vitro studies were also implemented to evaluate the proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells (MSCs) on the scaffolds. CCK8 cell proliferation assay kit and alkaline phosphatase (ALP) staining solution were used to study cell proliferation and early ALP content at the scaffold surface. Moreover, the osteogenic differentiation of MSCs on scaffolds was also evaluated through the scanning electron microscopy analysis.

Results

β-TCP/chitosan scaffold has good performance and degradation rate, and in vitro cell experiments also confirm that the scaffold has adequate cytocompatibility and bioactivity.

Conclusion

This study provides a promising new strategy for the design of customised scaffolds for the repair of complex damaged tissues.

Radial Head Resection versus Arthroplasty in Unrepairable Comminuted Fractures Mason Type III and Type IV: A Systematic Review

Unrepairable comminuted fractures of the radial head Mason type III or type IV have poor outcomes when treated by open reduction and internal fixation. Radial head resection has been proposed as good option for surgical treatment, while in the last decades, the development of technology and design in radial head prosthesis has increased efficacy in prosthetic replacement. The present review was conducted to determine the best surgical treatment for comminuted radial head when ORIF is not possible. Better outcomes are reported for radial head arthroplasty in terms of elbow stability, range of motion, pain, and fewer complications compared to radial head excision. Nevertheless, radial head resection still can be considered an option of treatment in isolated radial head fractures with no associated ligament injuries lesion of ligaments or in case of older patients with low demanding function.

The minimum follow-up required for radial head arthroplasty: a meta-analysis

AIMS

The primary aim of this study was to define the standard minimum follow-up required to produce a reliable estimate of the rate of re-operation after radial head arthroplasty (RHA). The secondary objective was to define the leading reasons for re-operation.

MATERIALS AND METHODS

Four electronic databases, between January 2000 and March 2017 were searched. Articles reporting reasons for re-operation (Group I) and results (Group II) after RHA were included. In Group I, a meta-analysis was performed to obtain the standard minimum follow-up, the mean time to re-operation and the reason for failure. In Group II, the minimum follow-up for each study was compared with the standard minimum follow-up.

RESULTS

A total of 40 studies were analysed: three were Group I and included 80 implants and 37 were Group II and included 1192 implants. In Group I, the mean time to re-operation was 1.37 years (0 to 11.25), the standard minimum follow-up was 3.25 years; painful loosening was the main indication for re-operation. In Group II, 33 Group II articles (89.2%) reported a minimum follow-up of < 3.25 years.

CONCLUSION

The literature does not provide a reliable estimate of the rate of re-operation after RHA. The reproducibility of results would be improved by using a minimum follow-up of three years combined with a consensus of the definition of the reasons for failure after RHA. Cite this article: Bone Joint J 2017;99-B:1561-70.

Effect of Concomitant Elbow Injuries on the Outcomes of Radial Head Arthroplasty: A Cohort Comparison

OBJECTIVES

To compare physical impairments and patient-reported outcomes in patients after simple and complex elbow injuries who were treated with radial head arthroplasty.

DESIGN

Prospective.

SETTING

Quaternary upper extremity referral hospital.

PATIENTS/PARTICIPANTS

148 patients with isolated elbow trauma and no previous injury to the elbow were prospectively enrolled after radial head arthroplasty for an acute unreconstructable fracture. Injury patterns were classified as simple or complex based on the presence or absence of associated elbow fractures and/or dislocation.

INTERVENTION

Radial head arthroplasty.

MAIN OUTCOME MEASUREMENTS

Patient-Rated Elbow Evaluation (PREE), Disability of the Arm, Shoulder, and Hand, range of motion (ROM), and Biodex measurements.

RESULTS

At a minimum 1-year follow-up PREE and Disability of the Arm, Shoulder, and Hand, and ROM and strength values were similar. Forty-four patients evaluated at a mean of 7 years demonstrated no effect of injury pattern on clinical outcomes at any time point. Continued statistical improvements in PREE, supination ROM, and flexion ROM at medium term compared with earlier follow-up were observed. Eight patients required secondary surgery, 2 in the simple injury group and 6 complex injury patients.

CONCLUSIONS

Concomitant elbow injuries do not affect the longer term outcomes of patients with unreconstructable radial head fractures requiring radial head arthroplasty. Patient outcomes continued to improve beyond 2 years of follow-up.

LEVEL OF EVIDENCE

Therapeutic Level II. See Instructions for Authors for a complete description of levels of evidence.