Percutaneous fixation of proximal humerus fractures

Optimal Treatment of Proximal Humeral Fractures in the Elderly: Risks and Management Challenges

Proximal humeral fractures (PHFs) are a common type of fracture, particularly in older adults, accounting for approximately 5-6% of all fractures. This article provides a comprehensive review of PHFs, focusing on epidemiology, injury mechanism, clinical and radiographic assessment, classification systems, and treatment options. The incidence of PHFs varies across regions, with rates ranging from 45.7 to 60.1 per 100,000 person-years. Females are more susceptible to PHFs than males, and the incidence is highest in women over the age of 85. The injury mechanism of PHFs is typically bimodal, with high-energy injuries predominant in younger individuals and low-energy injuries in the elderly. Clinical assessment of PHFs involves obtaining a thorough history, physical examination, and evaluation of associated injuries, particularly neurovascular injuries. Radiographic imaging helps assess fracture displacement and plan for treatment. The Neer classification system is the most commonly used classification for PHFs, although other systems, such as AO/OTA, Codman-Hertel, and Resch classifications, also exist. The choice of treatment depends on factors such as patient age, activity level, fracture pattern, and surgeon expertise. Nonoperative management is typically preferred for elderly patients with minimal displacement, while operative fixation is considered for more complex fractures. Nonoperative treatment involves sling immobilization followed by physiotherapy, with good outcomes reported for certain fracture patterns. Operative management options include closed reduction and percutaneous pinning (CRPP), open reduction and internal fixation (ORIF), or arthroplasty. CRPP is suitable for specific fracture patterns, but the quality of reduction is crucial for favorable outcomes. ORIF is used when CRPP is not feasible, and various surgical approaches are available, each with its advantages and potential complications. PHFs are a significant clinical challenge due to their prevalence and complexity. Treatment decisions should be patient centered based on patient factors and fracture severity.

Radiographic Evaluation of the Consolidation of Humerus Surgical Neck Fractures Treated With Percutaneous Fixation

Objective  To evaluate radiographically the postoperative results of patients with fracture of the proximal humerus in two parts of the surgical neck treated with threaded percutaneous fixation.

Methods  We evaluated the radiographic results of percutaneous fixation with threaded pins on the treatment of proximal humerus fractures in our service. Preoperative and postoperative images of 42 patients were evaluated, evaluating radiographs until 8 weeks postoperatively. We considered on evaluation the fracture deviation on preoperative images, the loss of reduction and no consolidation.

Results  Our consolidation rate was 90.4%, with loss of reduction in 16.6% of the cases and no consolidation rates in just 4 operated cases. We observed a predominance of a specific fracture pattern in the cases with loss of reduction.

Conclusion  The present study allows us to consider the percutaneous fixation technique with threaded pins as an alternative in our therapeutic arsenal for the proximal humerus fracture of the surgical neck. Contraindications are considered for low fracture trait on the metaphysis and with medial/lateral cortical impairment.

Indications and results of osteosynthesis for proximal humerus fragility fractures in elderly patients

Proximal humerus fractures (PHF) are common injuries in the elderly population. Conservative treatment is indicated for undisplaced and stable fractures, which account for almost 80% of the cases. More complex fracture patterns might need surgery, with a wide variety of indication criteria and surgical techniques described in the literature. Surgical treatment should be reserved for patients in good clinical conditions, autonomous in daily living activities and able to adhere to postoperative rehabilitation protocols. In the elderly population with severe osteoporosis, cognitive impairment and clinical comorbidities, the risk of surgical failures is high. In these patients, the choice between surgical and conservative treatment, as well as for the type of procedure, is even more difficult, with no general consensus in the literature. Final indication is usually conditioned by surgeon’s experience and preference. Two independent reviewers (B.H and G.G) independently extracted studies on proximal humeral fractures. All selected studies were screened independently (B.H and G.G) based on title and abstract. Then the full text of any article that either judged potentially eligible was acquired and reviewed again. Any disagreement was resolved by discussing the full text manuscripts. Aim of the present paper is to review the literature about indications and results of osteosynthesis for proximal humerus fragility fractures in the elderly population.

Outcomes following fixation for proximal humeral fractures

Fractures of the proximal humerus are a very common presentation in modern Trauma and Orthopaedic practice. In an ever-aging population, the incidence has dramatically increased resulting in a large socioeconomical burden. The surgical management of these injuries has evolved over the years. Patient outcomes are variable and there is no consensus on treatment approach. This review article focuses on the outcomes following fracture fixation using common surgical techniques.

How to Prevent K-Wire Bounce in Oblique Supracondylar Humerus Fractures

Supracondylar humerus fractures with an obliquely oriented fracture pattern can pose a clinical challenge in obtaining adequate fixation. Traditionally, 1.6-mm Kirchner wires are used for fracture fixation when pinning pediatric supracondylar humerus fractures. However, when pinning across obliquely oriented fractures, the angle of pin inclination may increase to the point where the 1.6-mm k-wire cannot penetrate the far cortex. We have found that, when pinning oblique supracondylar humerus fractures, utilization of a 2.0-mm k-wire can assist the surgeon in obtaining bicortical purchase. We present a cadaveric study demonstrating the maximal angles at which both 1.6-mm and 2.0-mm k-wires will penetrate the far cortex. This technical trick can give surgeons a relatively simple solution to treat these difficult fractures.

Fixation of a Proximal Humerus Fracture Using a Polyaxial Locking Plate and Endosteal Fibular Strut

Proximal humerus fractures have a bimodal distribution and are most commonly seen in the elderly and are the third most common fracture pattern seen in the elderly. There is also a subset of these fractures that occur in younger patients secondary to higher energy mechanisms. Nonoperative management is often advocated for a majority of patients, but surgical fixation is often pursued for younger patients or active, older patients with significantly displaced and reconstructable fractures. The most common options for fixation include open reduction and internal fixation with locking plates and intramedullary nailing. Percutaneous pinning and non-locking plate fixation have lost favor with the advent of improved fixation techniques. Recently developed polyaxial locking plates and the use of endosteal fibular strut grafts offer an excellent option for the fixation of these injuries. In this video, we discuss the case of a 47-year-old man with a four-part proximal humerus fracture.

Treatment of proximal humerus fractures in children with a modified palm tree technique

Although most pediatric proximal humeral fractures can be successfully treated conservatively with satisfactory results, many operative techniques have been described for the treatment of displaced proximal humeral fractures. The aim of this study is to evaluate the efficacy of percutaneous fixation using a modified palm tree technique for proximal humerus fractures in children. Between March 2011 and May 2013, the modified palm tree technique was used for the management of 30 children (20 boys and 10 girls) with displaced proximal humeral fractures. The average age of the patients was 11.5 years (age range from 8 to 15 years). They were evaluated clinically by the Constant-Murley score and by radiological analysis. The average follow-up duration was 18 months. The average time of fracture union was 6 weeks (range from 4 to 8 weeks). The average Constant score of the patients was 92 (range from 87 to 95), with excellent results in 27 (90%) cases, good results in three (10%) cases, and no fair or poor results (0%). The reported complications were superficial pin-tract infection in five cases, treated by daily dressing and local antibiotics, and malunion with a varus deformity in two cases (about 15°), with no recorded cases with deep infection. None of the cases required open reduction. No cases were complicated by avascular necrosis of the head humerus or loss of fixation. Kirschner wires were removed after an average period of 7 weeks. The modified palm tree technique represents an efficient method for the treatment of proximal humerus fractures in children. It produces a good grip in both the proximal and distal fragments. It allows for early joint movements.

Fixation of a Proximal Humerus Fracture With an Intramedullary Nail

Proximal humerus fractures (PHFs) are common injuries seen mostly in elderly patients. Although nonoperative management is acceptable for most patients, surgical fixation is often advocated for younger patients or active, elderly patients with reconstructable fractures. A variety of fixation methods exist: percutaneous pinning, open reduction and internal fixation with locking plates, and intramedullary nailing are viable options. Modern intramedullary nails serve as excellent options for the fixation of many operative PHFs. In this Supplemental Digital Content 1 (see video, http://links.lww.com/JOT/A27), we discuss the care of a 63-year-old active, healthy female with a 2-part PHF. The details of fixation of PHFs using a straight intramedullary nail are included, as well as a relevant literature review and description of our postoperative rehabilitation protocol.

The results of tension band rotator cuff suture fixation of locked plating of displaced proximal humerus fractures

INTRODUCTION

The purpose of this study was to assess 1-year outcomes of patients with displaced proximal humerus fractures who underwent treatment with locked plate fixation with rotator cuff suture augmentation.

METHODS

A total of 86 patients who had sustained 2, 3 and 4-part displaced proximal humerus fractures underwent locked plate fixation with multiple sutures placed in the cuff tendons. Clinical outcome variables included active forward elevation (AFE), active external rotation (AER), and Constant and American Shoulder and Elbow Surgeons (ASES) scores. Post-operative variables included the following complications: varus re-collapse, loss of fixation, osteonecrosis of the humeral head (AVN), screw cut out, hardware failure and infection.

RESULTS

Forty-one patients were available with minimum of 1-year follow-up. Mean AFE was 142±17.0° and AER was 41±13.0°. The overall complication rate was 14.6%, with osteonecrosis being the most common (12.2%). Of the 21 patients (51.2%) that initially had varus displacement, all but one maintained anatomic reduction and fixation. Mean ASES score was 78.2±20.0 and average Constant score was 72.7±17.6. Bivariate analyses demonstrated that pre-operative medial comminution (p=0.297) or varus collapse (p=0.95) were not associated with an increased likelihood of sustaining a complication.

CONCLUSIONS

Follow-up of patients in this series demonstrated a low overall complication rate and excellent functional outcomes. We believe suture augmentation of the rotator cuff can counteract varus forces on proximal humerus fractures fixed with locked plates, and should be performed routinely in displaced 2, 3 and 4 part fractures.

Management of Acute Proximal Humeral Fractures

Proximal humeral fractures, which typically occur in elderly persons, are among the most common fractures. A myriad of nonsurgical and surgical treatment options exist for these injuries, including short-term immobilization and early physical therapy, percutaneous fixation, plate osteosynthesis, intramedullary nailing, hemiarthroplasty, and reverse shoulder arthroplasty. The choice of treatment depends on the fracture type and severity, surgeon expertise, patient age, and patient health status.

Minimal Invasive Percutaneous Osteosynthesis for Elderly Valgus Impacted Proximal Humeral Fractures with the PHILOS

There is a growing concern about elderly valgus impacted proximal humeral fractures. The aim of this study was to evaluate the treatment and clinical outcomes following minimal invasive percutaneous plate osteosynthesis (MIPPO) with the proximal humeral internal locking system (PHILOS) for the treatment of elderly valgus impacted proximal humeral fracture. Between May 2008 and May 2012, 27 patients (average age 67.3, range 61–74) with valgus impacted proximal humeral fractures were enrolled in the study. The patients were treated with MIPPO using PHILOS-plate through the anterolateral delta-splitting approach. Rehabilitation exercises were done gradually. The NEER score and Constant-Murley score were used to evaluate shoulder function. All the patients were followed up by routine radiological imaging and clinical examination. There were 15 cases of II-part greater tuberosity fractures, 10 cases of III-part greater tuberosity fractures, and 2 cases of IV-part fractures according to the NEER classification. The surgery was successful in all patients with an average follow-up of 20.8 (range: 11–34) months. The fractures united in an average of 7.2 (6–14) weeks without implant loosening. According to NEER score, there were 17 excellent, 7 satisfactory, 2 unsatisfactory, and 1 poor. The mean Constant-Murley score was 89.4 ± 4.35. No complication including axillary nerve damage, postoperative nerve or vessel damage, infections, DVT, or death was observed. In conclusion, the MIPPO technique with the PHILOS through the anterolateral delta-splitting approach seems to be a safe and easy treatment for elderly valgus impacted proximal humeral fractures. A case-control study and longer follow-up time are needed.

Displaced proximal humeral fractures: when is surgery necessary?

BACKGROUND

Several therapeutic methods have been traditionally used in the treatment of displaced proximal humeral fractures; however, the indication of these treatments is still controversial. The purpose of this study was to compare the medium-term functional results of four methods commonly used in the treatment of proximal humeral fractures [conservative treatment, proximal humeral nails (PHN), percutaneous K-wiring (PKW), and locking-plates (LP)] taking into consideration the type of fracture and the age of the patients.

METHODS

We conducted a retrospective cohort study on patients with proximal humeral fractures treated with one of the following methods: conservative treatment, PHN, PKW, or LP. Functional results were assessed using the absolute Constant score and the disabilities of the arm shoulder and hand score (DASH). The functional outcome was analysed according to age (≥65 years and <65 years) and fracture type (displaced 2-fragment and 3-4-fragment fractures).

RESULTS

A total of 113 patients were included in the study, with a mean age of 65.3 SD 15.2 years and average follow-up time of 26.2 SD 12.6 months. Patients under 65 years had higher Constant scores when treated with PHN and PKW than those treated conservatively (77.2 vs. 54.7, p=0.01 and 74.0 vs. 54.7, p=0.03, respectively). Patients above 65 years had higher Constant scores when treated with PKW compared to PHN and conservative treatment (68.7 vs. 51.9, p=0.02 and 68.7 vs. 55.9, p=0.029, respectively). In 2-fragment fractures, PKW resulted in higher Constant scores than conservative treatment (70.4 vs. 53.9, p=0.048). No differences were found in the final outcome between patients treated with LP and those treated conservatively regardless of age, and fracture type. There were also no differences between any of the evaluated methods in the treatment of 3-4-fragment fractures.

CONCLUSION

The use of PKW was associated with better functional results than conservative treatment in individuals of all ages, especially in patients with 2-fragment fractures; PKW also achieved better functional results than PHN in elderly patients. PHN was superior to conservative treatment in young individuals. No significant differences were found between LP and conservative treatment in any of the analysed categories.

Long Term Results of PHILOS Plating and Percutaneous K-Wire Fixation in Proximal Humerus Fractures in The Elderly

ABSTRACT

This is a report of a study on the long term results of PHILOS plating and percutaneous K-wire fixation in a prospective series of proximal humerus fractures in elderly patients. We reviewed a total of 60 patients with proximal humerus fractures in 30 patients (Group 1), who were treated by open reduction and internal fixation with Proximal Humeral Internal Locking System (PHILOS) plate and 30 patients (Group 2) who were treated with percutaneous K-wire fixation. Functional outcome was assessed using Visual Analogue Scale(VAS) and Constant-Murley Score. Mean Constant-Murley score was 84.6 points (range: 61- 100) in Group 1 and - 76.4 points(range:56-100) in Group 2 at final follow up. Values varied depending upon the fracture type with worst in 4-part fractures. Mean VAS Score was 2.6(range:0-10) in Group 1 and 3.8(range:0-10) in Group 2. We obtained satisfactory results in both the groups, with each procedure having its advantages and shortcomings. We found that PHILOS plate fixation provided stable fixation with minimal implant problems and enabled early range-ofmotion exercises to achieve acceptable functional results. Fixation with percutaneous K-wires presented an efficient treatment option with the advantages of minimal invasiveness and soft tissue dissection.

KEY WORDS

Proximal humerus fractures, PHILOS plate and K-wires.

A review of management options for proximal humeral fractures

Proximal humeral fractures are common and although the majority can be managed non-operatively, the optimal treatment of displaced or complex fractures remains controversial. Non-operative treatment is typically selected for minimally displaced fractures where union rates are high and good or excellent outcomes can be expected in approximately 80% of cases. The aims of surgical fixation are to restore articular surface congruency, alignment and the relationship between the tuberosities and the humeral head. Hemiarthroplasty provides patients with reliable pain relief and its indications include fracture dislocations, humeral head splitting fractures and some three- and four- part fractures. The key areas of surgical technique that influence functional outcome include correctly restoring the humeral height, humeral version and tuberosity position. Function, however, is poor if the tuberosities either fail to unite or mal-unite. The interest in reverse shoulder arthroplasty as an alternative option has therefore recently increased, particularly in older patients with poor bone quality and tuberosity comminution. The evidence supporting this, however, is currently limited to multiple case series with higher level studies currently underway.

Complication rates and outcomes stratified by treatment modalities in proximal humeral fractures: a systematic literature review from 1970-2009

Background

The optimal treatment of complex, displaced proximal humeral fractures is controversial. A systematic literature review of the time period from 1970 to 2009 was conducted. The purpose was to evaluate the clinical success and complications of the available treatment modalities to determine specific treatment recommendations for the different fracture patterns.

Methods

The databases (PubMed/EMBASE) were searched for the time period (01/1970–09/2009). Study quality, treatment modalities, classification, outcome scores and complications of 200 publications including 9377 patients were analyzed. Interventions were compared by analysis of variance with subsequent Tukey’s-test. Complication rates among methods were compared by using Pearson’s-chi-square-test and pairwise comparisons using Fisher’s-two-tailed-exact-test.

Results

Hemiarthroplasty, angle-stable plate and non-operative treatment were used for 63% of the follow-up-patients. For 3- and 4-part fractures, patients with hemiarthroplasty [3-Part: 56.4 (lower/upper 95% confidence interval (CI): 43.3-68.7); 4-Part: 49.4 (CI: 42.2-56.7)] received a lower score than different surgical head-preserving methods such as ORIF [3-Part: 82.4 (CI: 76.6-86.9); 4-Part: 83.0 (CI:78.7-86.6)], intramedullary nailing [3-Part: 79.1 (CI:74.0-83.4)] or angle-stable plates [4-Part: 66.4 (CI: 59.7-72.4)].

The overall complication rate was 56%. The most common complications were fracture-displacement, malunion, humeral head necrosis and malreduction. The highest complication rates were documented for conventional plate and hemiarthroplasty and for AO-C, AO-A, for 3- and 4-part fractures. Only 25% of the data were reported with detailed classification results and the corresponding outcome scores.

Discussion

Despite the large amount of patients included, it is difficult to determine adequate recommendations for the treatment of proximal humeral fractures because a relevant lack of follow-up data impaired subsequent analysis. For displaced 3- and 4-part fractures head-preserving therapy received better outcome scores than hemiarthroplasty. However, a higher number of complications occurred in more complex fractures and when hemiarthroplasty or conventional plate osteosynthesis was performed. Thus, when informing the patient for consent, both the clinical results and the possibly expected complications with a chosen treatment modality should be addressed.

Displaced fragility fractures of proximal humerus in elderly patients affected by severe comorbidities: percutaneous fixation and conservative treatment

BACKGROUND AND AIMS

Proximal humerus is a common site of fracture in elderly patients, mainly related to bone fragility. Comorbidities are often present in these patients and may limit the surgical options. Not or minimal invasive treatments are commonly indicated however with variable results. The authors present their experience with conservative approach and percutaneous fixation by K-wires, focusing on their indications and main advantages on this population: mini-invasivity, acceptable reduction and recovery, and low costs.

METHODS

A study group of 51 consecutive patients with a mean age of 75.5 and affected by severe comorbidities (mainly cardiac, circulatory, pneumologic, neurologic, metabolic, and nephrologic pathologies) were evaluated clinically (ASA score, VAS, muscular strength, Constant-Murley score), and with radiologic analysis: 28 patients were treated by percutaneous fixation, while 23 subjects were treated conservatively.

RESULTS

Fractures treated by K-wires fixation healed after a mean interval of 8.2 weeks in all fractures but one, with improvements in mean Constant-Murley score (up to 80.6 points), in mean VAS (2.9), in muscular strength (4.1), and in range of motion. Fractures treated by brace healed in a mean time of 10.2 weeks. Mean Constant-Murley score improved to 76.4 points, VAS to 3.0, muscular strength to 3.8 points, and significant recovery of range of motion.

CONCLUSIONS

Results of the study confirm that both percutaneous fixation and conservative treatment may represent suitable options for proximal humerus fragility fractures in elderly patients, not candidated to open surgery for severe associated comorbidities.

LEVEL OF EVIDENCE

IV (case series study).

Incidence and severity of infections after closed reduction and external fixation of proximal humeral fractures

OBJECTIVES

This study aimed to evaluate the incidence and severity of pin tract infections in a series of patients treated by Closed reduction external fixation (CREF) for proximal humeral fractures.

DESIGN

Retrospective review of medical charts and radiographs.

SETTING

Academic level-1 trauma center.

PATIENTS

Forty-six consecutive patients (20 males, 26 females, mean age 50 years (range 20-90 years) with proximal humeral fractures treated by CREF were enrolled into the study based on data retrieved from medical charts and radiographs.

INTERVENTION

None.

MAIN OUTCOME MEASURE

Evaluation of the incidence and severity of post-CREF pin tract infections.

RESULTS

All 46 fractures healed after an average of 4 weeks. There were 18 (39.1%) cases of pin tract infections whose most common bacteria colonization was gram-positive. Pin tract infections were significantly higher among patients with multiple fragment fractures and multiple pins. Treatment consisting of oral or intravenous antibiotics was effective in all cases, and the infection was resolved within 2 weeks at most.

CONCLUSIONS

Most pin tract infections were managed with systemic antibiotics with good results. The occurrence of pin tract infection did not require a change of the stabilization method and none of the patients required revision of their CREF.

Current strategies for the treatment of proximal humeral fractures: an analysis of a survey carried out at 348 hospitals in Germany, Austria, and Switzerland

BACKGROUND

The therapeutic spectrum for the treatment of displaced proximal humeral fractures ranges from conservative therapy to head-preserving surgical interventions and joint replacement. This study initiated a survey on the current treatment options with regard to diagnostics, choice of therapy, and complications that are encountered at trauma surgeries and orthopedic hospitals in Germany, Austria, and Switzerland.

MATERIALS AND METHODS

The survey included 743 hospitals. The questionnaire covered information on demographics, diagnostics, classification, therapy, and complications of proximal humeral fractures.

RESULTS

The questionnaire was completed by 348 hospitals. Five of 6 hospitals treat more than 40% of the fractures surgically. The percentage distribution of the available implants is at 63.4% for angular stable plates, 30.9% for intramedullary nails, and 10.1% for fracture prostheses. The 5 complications reported most frequently were nonanatomic reduction (83%), implant perforation (73%), secondary displacement of the fracture (71%), avascular necrosis (67%), and implant-related impingement (59%).

CONCLUSIONS

A preference for surgical treatment of proximal humeral fractures was found, with stabilization predominantly being attempted by the use of angle-stable implants. The 2 most common complications were "nonanatomic reduction of fractures" and the more specific problem of "implant perforation" when fixed-angle implants were used for treatment.

Evaluation of the osteoporotic proximal humeral fracture and strategies for structural augmentation during surgical treatment

Fractures of the proximal humerus are relatively common injuries in the elderly population. Given the association between proximal humeral fractures and osteoporosis, elderly patients who sustain these injuries should always undergo a fragility fracture workup. Furthermore, a preoperative assessment of local bone quality can be critical in facilitating decision making regarding surgical and nonsurgical treatment. Modalities for quantifying osteoporosis in the proximal humerus include plain radiography and spiral computed tomography imaging. Optimal management of osteoporotic proximal humeral fractures has evolved and may now includes use of locking plates and augmentation with intramedullary fibular grafts, calcium phosphate or sulfate cement, and iliac crest bone graft. This article reviews the demographics of patients who sustain proximal humerus fractures, the appropriate postinjury fragility fracture workup, modalities for quantifying osteoporosis in the proximal humerus, techniques for augmenting fixation of proximal humerus fractures, and the authors' preferred approach to the treatment of these injuries.

Intermediate outcomes following percutaneous fixation of proximal humeral fractures

BACKGROUND

Mini-open reduction and percutaneous fixation of proximal humeral fractures historically results in good outcomes and a low prevalence of osteonecrosis reported with short-term follow-up. The purpose of this study was to determine the midterm results of our multicenter case series of proximal humeral fractures treated with percutaneous fixation.

METHODS

Between 1999 and 2006, thirty-nine patients were treated with percutaneous reduction and fixation for proximal humeral fractures at three tertiary shoulder referral centers. Twenty-seven of these patients were available for intermediate follow-up at a minimum of three years (mean, eighty-four months; range, thirty-seven to 128 months) after surgery; the follow-up examination included use of subjective outcome measures and radiographic analysis to identify osteonecrosis and posttraumatic osteoarthritis on radiographs.

RESULTS

Osteonecrosis was detected in seven (26%) of the total group of twenty-seven patients at a mean of fifty months (range, eleven to 101 months) after the date of percutaneous fixation. Osteonecrosis was observed in five (50%) of the ten patients who had four-part fractures, two (17%) of the twelve patients who had three-part fractures, and none (0%) of the five patients who had two-part fractures. Posttraumatic osteoarthritis, including osteonecrosis, was present on radiographs in ten (37%) of the total group of twenty-seven patients. Posttraumatic osteoarthritis was observed in six (60%) of the ten patients who had four-part fractures, four (33%) of the twelve patients who had three-part fractures, and none (0%) of the five patients who had two-part fractures.

CONCLUSIONS

Intermediate follow-up of patients with percutaneously treated proximal humeral fractures demonstrates an increased prevalence of osteonecrosis and posttraumatic osteoarthritis over time, with some patients with these complications presenting as late as eight years postoperatively. Development of osteonecrosis did not have a universally negative impact on subjective outcome scores.

Technique of Kirschner wire reduction and fixation of displaced two-part valgus angulated proximal humerus fractures at the surgical neck

This article describes the technique of closed reduction with percutaneous fixation using Kirschner wires in helping the reduction of two-part valgus angulated and displaced proximal humerus fractures at the surgical neck. Traditional open reduction may lead to more accurate anatomic reduction; however, extensive tissue dissection increases the risk of avascular necrosis. Thus, closed reduction of unstable fracture mostly required forceful reduction maneuvers, which can harm the vascular supply and increase hematoma formation. Reduction of the fractured sides can easily be performed by engaging Kirschner -wires with a joystick method and fixation can be secured by using threaded pins. Thirty-six consecutive patients with displaced, two-part, valgus-angulated proximal humerus fractures at the surgical neck were treated by this method. The patients were followed for an average of 38 months. All fractures healed. According to the Constant scoring system, 21 patients (58%) had excellent, 9 patients (25%) had good, and 6 patients (17%) had fair results. The technique of closed reduction with a joystick method and percutaneous fixation is regarded as a reasonable treatment alternative in displaced two-part valgus angulated proximal humerus fracture.

Long term results of percutaneous fixation of proximal humerus fractures

BACKGROUND

Proximal humerus fracture in elderly osteoporotic patients usually leads to severe displaced and multifragmentary fractures. Associated comorbidities may limit surgical options and conservative treatment is commonly indicated, however, with variable results. In most cases, surgery is the treatment of choice in order to restore anatomical integrity, and allow early functional recovery. Several techniques were used over the years, each with specific indication. Percutaneous pinning after closed reduction, a mini-invasive technique and fixation by use of K-wires is not preferred commonly. We present our experience with this approach, focusing on its indications and advantages.

PATIENTS AND METHODS

A study group of 41 consecutive patients with a mean age of 65.5 years were evaluated clinically (VAS, Constant-Murley score, range of motion), and with radiological analysis: 35 patients finally completed a minimum followup of 24 months.

RESULTS

K-wires were removed after a mean interval of 4 weeks. Clinical and radiographic healing occurred in a mean time of 8.2 weeks in all fractures but one, with improvements in mean Constant-Murley score of 87.6 points, mean VAS of 2.3. In 33 patients, the reduction was considered satisfactory. In two cases, reduction was poor, but the patients however presented acceptable functional outcome.

CONCLUSIONS

Percutaneous pinning may represent a suitable option of treatment for 2-or 3-part proximal humerus fractures in selected subjects.

Angular-stable locked intramedullary nailing of two-part surgical neck fractures of the proximal part of the humerus. A multicenter retrospective observational study

BACKGROUND

The ideal fixation technique for the treatment of proximal humeral fractures remains unclear. In the present study, we evaluated the experience of three surgeons with the treatment of two-part surgical neck fractures with angular-stable intramedullary fixation.

METHODS

Forty-eight patients with forty-eight Neer two-part surgical neck proximal humeral fractures were managed with locked angular-stable intramedullary nail fixation by three surgeons. Shoulder pain and outcomes were quantified with Constant scores and standard radiographs.

RESULTS

Thirty-eight patients (including twenty-eight female patients and ten male patients) with a mean age of sixty-five years were followed for at least twelve months (mean, twenty months; range, twelve to thirty-six months). All fractures healed primarily. The mean follow-up Constant score (and standard deviation) was 71 ± 12 points (range, 37 to 88 points), with a mean age-adjusted Constant score of 97% (range, 58% to 119%). The mean Constant pain score was 13 ± 2.2 (possible range, 0 to 15 points, with 15 points representing no pain). The mean forward flexion was 132° ± 22°. All fractures but one healed with a neck-shaft angle of ≥125°.

CONCLUSIONS

Patients who were managed with locked angular-stable intramedullary nailing of two-part surgical neck proximal humeral fractures via an articular entry point had reliable fracture-healing, favorable clinical outcomes, and little residual shoulder pain.

Biomechanical evaluation of two-part surgical neck fractures of the humerus fixed by an angular stable locked intramedullary nail

OBJECTIVE

The aim of the current study was to see how different interlocking mechanisms would affect construct stability and overall failure in the treatment of two-part surgical neck fractures in the proximal humerus in vitro.

METHODS

Left and right bones of eight pairs of fresh-frozen human cadaveric humeri were assigned to either a group with conventional or a group with angular stable distal interlocking. The different experimental interlocking mechanisms were used in a surgical neck fracture model of the humerus (Orthopaedic Trauma Association 11- A3) stabilized by a proximal humeral nail. The following variables were evaluated by biomechanical tests: hysteresis width in bending and torsion, stiffness, and fracture gap movement during cyclic axial loading until failure and the overall failure mechanism of the construct.

RESULTS

The angular stable group showed significantly less motion in initial bending and torsion and higher bending stiffness throughout the complete deformation cycle compared with the conventional interlocked group. Fracture gap movement was significantly less in the angular stable group. Higher stability was mainly observed in the early phase of the applied loading pattern; however, ultimate failure was not related to distal interlocking but occurred in the proximal fragment in both groups.

CONCLUSIONS

An experimental angular stable distal interlocking system of proximal humeral nails shows higher construct stability in the early phase of fracture fixation in vitro. In terms of overall failure, loss of fixation in the proximal fragment was crucial and not different between groups.

Forty-five-degree or higher insertion angles are required to penetrate the opposite cortex in bicortical applications of Kirschner wires: an in vitro study on sheep bones

PURPOSE

Slippage of the wires over the opposite cortex from the endosteal side is frequent and can lead to insufficient stability. This in vitro biomechanical study was planned to investigate the angle of wire insertion that leads to trans cortex perforation.

METHODS

Long bones of sheep were cut longitudinally into two pieces and half bones were stabilised on a frame. Three orthopaedic surgeons performed the experiment using ten wires of four different diameters at two different drilling speeds. Each wire was introduced from the endosteal side at angles starting at 30° in 5° increments until perforation. When perforation was achieved, the angle was recorded. To determinate the critical angle of perforation, receiver operating characteristic (ROC) curve analyses was performed. Two-way factorial analysis of variance (ANOVA) and Kruskal-Wallis tests were used for statistical comparisons.

RESULTS

Kirschner-wire insertion angles of ≥ 45° provided perforation with a percentage of 83.9 %. Wire diameter, drilling speed and surgeon variables had no effect on perforation angles (p > 0.05).

CONCLUSION

If preoperative evaluation of fractures to be fixed by K wires reveals the need for oblique wire insertion angle < 45°, a standard trocar-tip K wire application would lead to slippage of the wire tip on the endosteal surface of the opposite cortex. According to this study, the operative plan should be changed if such obliquity of the K wire is mandatory during bicortical applications.

Management of proximal humeral fractures in elderly patients with uni- or polyaxial locking osteosynthesis system

INTRODUCTION

To evaluate the clinical efficacy of uni- and polyaxial locking osteosynthesis systems in the management of proximal humeral fractures in elderly patients, totally 76 cases were reviewed including 18 cases of two-part (Neer classification), 36 cases of three-part, and 22 cases of four-part fractures.

METHODS

All the patients received open reduction and internal fixation with proximal humerus internal locking osteosynthesis system (PHILOS) or Numelock systems designed for proximal humerus.

RESULTS

Results showed no significant difference between groups considering the Constant-Murley scores assessed at 6 and 12 months, postoperatively. Satisfactory outcomes were achieved in 73.7 and 75.0% of the patients from the PHILOS and Numelock groups, respectively. Complications included four cases of varus malunion, one case of screw cut-out, and another case of avascular necrosis.

CONCLUSION

Both of the PHILOS and Numelock systems showed equally good results considering fixation stability and functional outcomes of proximal humeral fractures in elderly patients.

Surgical treatment of two-part fractures of the proximal humerus: comparison of fixed-angle plate osteosynthesis and Zifko nails

INTRODUCTION

Closed reduction and percutaneous pinning using Zifko nails offer the advantage of a minimal soft-tissue dissection but have been criticised for limited stability and secondary fracture dislocation. Angular stable plate osteosynthesis enables anatomic reduction, but carries the risk of soft tissue traumatisation and consecutive humeral head necrosis. The present study compares the clinical and radiological outcome of patients with dislocated two-part fractures of the proximal humerus, who were treated with either Zifko nails or angular stable plate fixation.

MATERIAL AND METHODS

A matched-pair analysis was performed and patient groups were matched according to age (3 years), sex and fracture type. As many as 11 pairs of patients with a minimum follow-up of 3 years were formed and investigated radiographically and clinically using the Constant score (CS) and the visual analogue scale (VAS) for the patients' satisfaction.

RESULTS

At the time of follow-up, the absolute CS was 83 points in the PHP group and 78 points in the Zifko group (n.s.). Neither in the age and gender-corrected CS was found a significant difference between the study groups (PHP 104 29, Zifko 95 17, n.s.) nor in terms of subjective patient satisfaction (PHP 6.54; Zifko 7.8, n.s.). The complication rate was also comparable in both groups.

CONCLUSION

In conclusion, Zifko nailing represents a cost-effective minimally invasive surgical method with a complication rate and clinical outcome comparable to that after angular stable osteosynthesis by angular stable plate fixation in the treatment of two-part fractures of the proximal humerus.