Minimal invasive long PHILOS®-plate osteosynthesis in metadiaphyseal fractures of the proximal humerus

3D printing assisted MIPO for treatment of complex middle-proximal humeral shaft fractures

BACKGROUND

This study was designed to explore the clinical efficacy of 3-dimensional (3D) printing assisted minimally invasive percutaneous plate osteosynthesis (MIPO) technique by comparing the clinical outcomes with traditional open reduction and internal plating fixation (ORIF) for treating complex middle-proximal humerus fractures (AO 12C fracture type).

MATERIALS AND METHODS

The data of 42 participants who received a complicated middle-proximal humerus fracture from the beginning of 2018 to the end of 2022 were retrospectively analyzed. All patients were assigned to two groups: MIPO with detailed preoperative planning assisted by 3D printing technique (MIPO group), and traditional ORIF (ORIF group).

RESULTS

This study included 21 patients in the ORIF group and 21 patients in the MIPO group. All patients were followed-up for at least one year (mean: 16.12 ± 4.13 months), and no difference was observed in the range of shoulder joint motion (ROM), Quick Disabilities of the Arm, Shoulder and Hand (QuickDASH) scores and Constant scores between the two groups. However, the occurrence of complications (surgical incision site infection, implant loosening, bone nonunion and radial nerve palsy) in ORIF group was remarkably higher compared to the MIPO group. All the cases achieved bone union within the MIPO group. Significant differences were found in surgical time, intraoperative blood loss and fracture healing time between the two groups.

CONCLUSION

Preoperative 3D printing assisted MIPO technique exhibits obvious advantages in high operational efficiency and low occurrence of complications, which is worthy of clinical application for treating complex middle-proximal humeral shaft fractures.

Lateral minimally invasive plate osteosynthesis (MIPO) with long PHILOS for proximal metaphyseal-diaphyseal humeral fracture: surgical techniques and a clinical series

The minimally invasive plate osteosynthesis (MIPO) for proximal metaphyseal-diaphyseal humeral fracture is an effective alternative treatment with satisfactory outcomes. In this study, we described the surgical techniques and clinical results using MIPO via a lateral approach and long PHILOS plate fixation in 23 patients. All fractures were successfully united within a mean union time of 13.5 weeks (range 9-18). There was no iatrogenic radial nerve palsy. The deltoid power was grade 5 in all patients, except for 2 patients who had associated brachial plexus injury and gunshot injury at the deltoid muscle. The mean Constant-Murley score was 85.6 (range 16-98) and DASH score was 12.1 (range 1.7-85). Based on these findings, the lateral MIPO with long PHILOS plate fixation could be an alternative for the proximal metaphyseal-diaphyseal fractures of the humeral shaft.

Minimally invasive lateral plating for diaphyseal fractures with extension into the proximal humerus and its implications for the deltoid muscle and its distal insertion: functional analysis and MR-imaging

BACKGROUND

In minimally invasive lateral plate osteosynthesis of the humerus (MILPOH) the plate is introduced through a deltoid split proximally and advanced through the central portion of the deltoid insertion and between bone and brachial muscle to the distal aspect of the humerus. The fracture is then indirectly reduced and bridged by the plate. Whereas it has been shown that the strong anterior and posterior parts of the distal deltoid insertion remain intact with this maneuver, its impact on deltoid muscle strength and muscular morphology remains unclear. It was the aim of this study to evaluate deltoid muscle function and MR-morphology of the deltoid muscle and its distal insertion after MILPOH.

METHODS

Six patients (median age 63 years, range 52-69 years, f/m 5/1) who had undergone MILPOH for diaphyseal humeral fractures extending into the proximal metaphysis and head (AO 12B/C(i)) between 08/2017 and 08/2020 were included. Functional testing was performed for the injured and uninjured extremity including strength measurements for 30/60/90° shoulder abduction and flexion at least one year postoperatively. Constant-Murley-Score (CMS) including an age-and gender-adjusted version, were obtained and compared to the uninjured side. Oxford Shoulder Score (OSS) and the Disability of the Arm, Shoulder and Hand (DASH) questionnaire were acquired for the affected extremity. Quality of life was measured using the EQ visual analogue scale (EQ-5D-5 L VAS). MR imaging was performed for both shoulders accordingly at the time of follow-up to assess the integrity of the distal insertion, muscle mass and fatty degeneration of the deltoid muscle. Muscle mass was determined by measuring the area of the deltoid muscle on the axial MR image at the height of the center of the humeral head.

RESULTS

Median follow-up was 29 months (range 12-48 months). Median difference of abduction strength after MILPOH was + 13% for 30°, 0% for 60° and - 22% for 90°. For flexion, the difference to the uninjured side was measured 5% for 30°, -7% for 60° and - 12% for 90°. Median CMS was 75 (66-82) for the operated extremity compared to 82 (77-90) for the uninjured side. Age- and gender-adapted CMS was calculated 88 (79-99) vs. 96 (89-107). Median OSS was 47 (40-48). DASH was 26 (15-36). EQ-5D-5 L VAS ranged from 81 to 95 with a median of 90. The median difference of the deltoid muscle area on MRI was 2% (-21% to + 53%) compared to the uninjured side. No fatty degeneration of the deltoid muscle was observed. The weaker central part of the distal deltoid insertion was exclusively perforated by the plate, leaving the strong anterior and posterior parts of the insertion intact in all patients.

CONCLUSIONS

MILPOH was associated with good functional and subjective outcome. Minor impairment of abduction strength was observed with increasing abduction angles. The reason for this impairment is unclear since MILPOH did not affect the structural quality of the deltoid muscle and the integrity of the strong anterior and posterior parts of its insertion remained intact.

TRIAL REGISTRATION

26/05/2023: ISRCTN51786146.

Arthroplasty as Primary Treatment for Metadiaphyseal Proximal Humerus Fractures: A Viable Alternative to Osteosynthesis for the Elderly

Introduction

in the elderly patient population, where fracture comminution, osteoporotic fractures, and associated arthritis or rotator cuff pathologies dominate, metadiaphyseal proximal humeral fracture is a challenging subset of fractures to treat. This study reports on cementless long-stem reverse total shoulder arthroplasty (RTSA) as primary treatment of metadiaphyseal proximal humeral fractures in elderly patients.

Materials & Methods

Between January 2018 and October 2021, 22 consecutive patients sustained proximal humerus fractures with metadiaphyseal extension and underwent surgery with cementless long-stem RTSA. Patients older than 60 years with minimum 1 year of clinical and radiographic follow-up were included. Patient demographics, range of motion, and patient reported outcomes [Visual Analog Scale (VAS) pain scale, Simple Shoulder Test (SST), Subjective Shoulder Value (SSV), and American Shoulder Elbow Surgeon (ASES) scores] were retrospectively collected. Postoperative X-rays were evaluated for fracture and tuberosity union.

Results

There were 14 eligible patients with a median age of 71 years (range 61-91 years) and a median 13 months follow-up. At final follow-up, the median active elevation was 120° (range 80°-150°), external rotation was 40° (range 0°-50°), and internal rotation was 40° (range 0°-80°). Median VAS was 2 (range 0-8), SST was 71% (range 33%-92%), SSV was 78% (range 20-90%), and ASES was 73 (range 17-90). All patients exhibited radiographic union. There were five minor complications in three patients: postoperative neuropathy, tuberosity nonunion, scapula notching, and proximal humeral stress shielding.

Conclusion

Cementless long-stem RTSA is a viable alternative to primary fracture fixation in the elderly patient population with metadiaphyseal proximal humerus fractures.

The use of medial support screw was associated with axillary nerve injury after plate fixation of proximal humeral fracture using minimal invasive deltoid-splitting approach

BACKGROUND

The purpose of this study was to evaluate the incidence and risk factors for axillary nerve injury after plate fixation of humeral fractures using minimal invasive deltoid-splitting approach. We hypothesized that the use of medial support screw (MSS) would be associated with the outcome of axillary nerve injury.

METHODS

This study retrospectively evaluated consecutive 32 patients who underwent surgical treatments for proximal or midshaft humeral fractures. Of them, we included 26 patients who were examined by electromyography/nerve conduction (EMG/NCV) study at 3-4 weeks postoperatively. We excluded 6 patients because two of them were not compliant to EMG/NCV and the remaining two died due to unrelated medical illness. Outcome assessments included pain, functional scores, range of motion, and radiographic results.

RESULTS

There were 8 male and 18 female patients with mean age of 67 ± 15 years. Mean duration of follow-up period was 31 ± 11 months. The mean time to EMG/NCS after surgery was 3.5 ± 0.6 weeks. EMG/NCS examinations revealed incomplete axillary nerve injury in 8 patients (31%) without complete nerve injury. Active forward elevation at 3 months postoperatively was significantly lower in patients with axillary nerve injury than in those without it (99° ± 12 and 123° ± 37, respectively, p = 0.047), although final clinical outcomes were not different. At surgery, MSS was used in 17 patients (65%), and 8 of them were associated with nerve injury. The use of MSS was only correlated with the outcome of axillary nerve injury, because the axillary nerve injury developed only in MSS group (p = 0.047). The MMT grade 4 in abduction strength was more common in patients with axillary nerve injury than in those without (p = 0.037).

CONCLUSIONS

Axillary nerve injury was a concern after plate fixation of proximal humeral fracture using minimal invasive deltoid-splitting approach. The use of medial support screw to improve the stability could increase a risk of axillary nerve injury when used with this approach.

Combined Humeral Head and Shaft Fractures: Outcome Following Intramedullary Nailing and Plating

Background and Objectives: Combined fractures of the humeral head and shaft (FHS) are rare but frequently involve an intermuscular fracture as its characteristic pattern. The aim of this retrospective study was to investigate intramedullary nailed and plated FHS in terms of outcomes and complications. Materials and Methods: The present study included patients with FHS, treated via either intramedullary nailing or plating within a period of 10 years, with a minimum follow-up of 12 months. Functional outcome was assessed using the age- and sex-adapted Constant-Murley Score (CMS-K). Rates of complications and revision surgeries were registered. Results: Twenty-five patients (18 females, 7 males, age 60.1 ± 14.2 years, range 23-76 years) were included in the study. Nailing was performed in 16 patients (12 females, 4 males, age 62.6 ± 12.4 years), whereas plating was executed in nine patients (6 females, 3 males, age 55.8 ± 17.0 years). Follow-up among all patients was 45.1 ± 26.3 months (range 12-97 months). CMS-K was 70.3 ± 32.3 in the nailing group, with reoperation in four cases, and 76.0 ± 31.0 in the plating group, with one reoperation (p = 0.42). Patients with no metaphyseal fragment displacement (n = 19; CMS-K 76.7 ± 17.3) demonstrated significantly better functional outcomes versus those with secondary displacement of the metaphyseal fragments (n = 6; CMS-K 60.0 ± 17.1), p = 0.046. Conclusions: Comparable acceptable clinical outcome is obtained when comparing nailing with additional open cerclage or lag-screw fixation techniques versus plating with open reduction. However, a higher revision rate was observed after nailing. The correct metaphyseal fragment fixation seems to be crucial to avoid loss of reduction and hence the need for revision surgery, as well as a worse outcome.

Proximal humerus fractures (PHFs): comparison of functional outcome 1 year after minimally invasive plate osteosynthesis (MIPO) versus open reduction internal fixation (ORIF)

PURPOSE

Osteosynthetic treatment strategies of PHFs include MIPO or ORIF techniques. The aim of this study was to compare the 1 year outcome following either technique in type B PHFs.

METHODS

This study was designed as a retrospective cohort study of patients treated at one academic Level 1 trauma center. Patients from 2009 to 2019 who required surgical treatment of a type B PHF were eligible to be included in this study. Patients with A- or C-type fractures or patients requiring arthroplasty were excluded. All patients were treated with Proximal Humerus Interlocking System (PHILOS) and stratified according the approach into Group MIPO or Group ORIF. Outcome measures include local complications that occurred during hospitalization, nonunion after 12 months, and range of motion after 1 year follow-up.

RESULTS

This study included 149 (75.3%) patients in Group ORIF, and 49 (24.7%) in Group MIPO. The fracture morphology and concomitant injuries were comparable amongst these groups. When compared with Group MIPO, Group ORIF had a 2.6 (95% CI 0.6-11.7) higher risk of suffering from local complications. The rate of postoperative nerve lesions was comparable (OR 0.9, 95% CI 0.1-9.7) as was the rate of soft tissue complications (OR 2.0, 95% CI 0.2-17.2). The risk for nonunion was 4.5 times higher (95% 1.1-19.5) in Group ORIF when compared with Group MIPO. Group MIPO had a higher chance of flexion above 90° (OR 8.2, 95% CI 2.5-27.7).

CONCLUSION

This study provides indications that patients following surgical treatment of PHFs in MIPO technique might have favourable outcome. Large-scale and high-quality studies are warranted to confirm these results.

Minimally invasive plate osteosynthesis for segmental humerus fractures with a helical plate. Which distal fixation—the anterior or lateral—is superior?

Aim: In order to achieve adequate stability in segmental humerus fractures, the PHILOS fixation with minimal invasive approach comes into use instead of conventional plating. However, according to the AO classification, 12C type segmental humerus fractures treated with minimally an invasive method are prone to complications. The purpose of this prospective study is to compare functional outcomes and complication rates following two different angled helical PHILOS plate fixation. Material and Method: This multicenter study is a prospective review of cases with a final follow-up outcome. Twenty-two patients with AO 12-C humerus fractures underwent PHILOS fixation with contoured PHILOS plates between January 2016 and June 2019. Patients evaluated in two groups. Group 1 consisted 12 patients who were treated with a 30° helical plate and Group 2 consisted 10 patients who were treated with 70° helical plate. Clinical outcomes were noted according to the Constant-Murley scoring system. Results: The mean age of patients treated in groups 1 and 2 were 49±15.8 and 50.7±17, respectively. Fractures healed in an average of 13.1±3.9 weeks in Group 1 and 13.8±3.1week in Group 2, respectively. The mean follow-up period of the patients was 18±6.1months in Group 1 and 22±4.2 months in Group 2. Mean Constant-Murley scores at final follow-up were 88±2.7 and 90±2.5 in Groups 1 and 2 respectively (p=.665). Radial nerve neuropraxia was seen in 2 cases in Group 1, and a sensorial injury of the musculocutaneous nerve was seen in 1 patient in Group 2 (p=.365). Conclusion: Similar union rates and successful clinical results were obtained from both groups. However, this study suggests that the 70° angled helical PHILOS technique could be performed relatively easily in AO 12-C fractures with fewer complication rates. Musculocutaneous nerve affliction can be as functionally destructive as radial nerve affliction.

Minimally invasive plate osteosynthesis of the humeral shaft with regard to adjacent anatomical characteristics

The study goal was to evaluate the distances from the radial (RN), the musculocutaneous (MN) and axillary nerves (AN) and the medial neurovascular bundle of the upper arm to a minimally invasive applied plate and to define its relation to the RN during different degrees of malrotation during MIPO. The sample involved ten upper extremities. Application of a PHILOS plate was performed through a Delta-split. Intervals between the AN, MN, RN and the medial vascular bundle were defined at various positions. The humeral shaft was artificially fractured at a height of about the mean of the plate. The distal fragment was brought into 15° and 30° internal (IR) as well as external rotation (ER) and here, the plate’s relation to the RN was evaluated. The medial neurovascular bundle intersected the plate at its distal part in two specimens. Regarding the distances from the RN to the plate during different rotation positions the distances became significantly longer during ER, respectively shorter during IR. The medial neurovascular bundle and the RN were identified as the main structures at risk. Care must be taken during distal screw placement and malrotation exceeding 15° must be avoided during MIPO.

Treatment of 2-Part Proximal Humeral Fractures in Osteoporotic Patients With Medial Calcar Instability Using a PHILOS Plate Plus an Allogeneic Fibula Inserted Obliquely - A Retrospective Study

INTRODUCTION

To date, there is little research assessing the efficacy of a proximal humeral internal locking system (PHILOS) plate plus an allogeneic fibula inserted obliquely in the treatment of 2-part proximal humerus fractures (PHFs) with calcar comminution in patients >60 years old with severe osteoporosis. The aim of this study was to retrospectively evaluate the outcomes of elderly patients with osteoporotic 2-part PHFs combined with medial column (calcar) instability or disruption who experienced a PHILOS plate plus an allogeneic fibula inserted obliquely.

MATERIALS AND METHODS

One hundred and twelve consecutive elderly patients with severe osteoporotic 2-part PHFs combined with calcar instability or disruption who were treated with a PHILOS plate plus an allogeneic fibula inserted obliquely were retrospectively identified from 3 tertiary medical centres during 2014-2019. The primary outcomes were the Constant scores and American Shoulder and Elbow Surgeons (ASES) scores; secondary outcome was the rate of key orthopaedic complications.

RESULTS

Median follow-up was 24 (15.3-27.6) months. Significant improvements in the median Constant scores were observed (39 [26-58 points] prior to surgery vs 81 [67-95 points] at final follow-up). The median ASES scores improved from 43 (26-64 points) prior to surgery to 83 (65-96 points) at final follow-up. The percentage of key orthopaedic complications was 25.6% (22/86). Four (4.7%) cases had loss of reduction, 4 (4.7%) experienced aseptic loosening, 1 (.8%) had non-union, 4 (4.7%) suffered a periprosthetic fracture, 3 (3.5%) experienced a revision surgery, 1 (.8%) had a dislocation and 5 (5.8%) suffered an unbearable shoulder pain.

CONCLUSION

For elderly patients with osteoporotic 2-part PHFs combined with calcar instability or disruption, PHILOS plate combined with an allogeneic fibula inserted obliquely might have recognisable advantages in decreasing the loss of fixation and preventing medial calcar collapse.

MIPO helical pre-contoured plates in diaphyseal humeral fractures with proximal extension. Surgical technique and results

INTRODUCTION

The aim of this study was to determine the feasibility of applying the MIPO technique with a helical-shaped plate in the treatment of humeral shaft fractures with proximal extension.

PATIENTS AND METHODS

We present an observational prospective study of patients with a humeral shaft fracture involving the proximal humerus fixed with a long proximal humerus polyaxial locking plate with an anterior curvature and helical shape (ALPS® Zimmerbiomet, Warsaw, Indianapolis, USA), using a MIPO technique. Between January 2017 and July 2020, 15 patients were treated at our institution. Proximally a 4-5 cm anterolateral transdeltoid approach was made. And distally, a 5-7 cm incision was made 4 cm proximal to the elbow crease. At each follow-up, radiographs were taken to evaluate fracture healing. Funtional scales were applied to evaluate clinical results.

RESULTS

Ten women and five men were included, with a mean age of 62 yo (range 26-86). All but one fracture healed uneventfully. The mean time to union was 28 weeks (range 12-48 weeks). Two out of 15 patients presented complications (an atrophic nonunion and a peri‑implant distal fracture). None of the patients had a nerve palsy prior neither after the surgery. No other complications, including infection, were registered during follow-up. Shoulder range of motion showed the following means: abduction of 147° (range 50°-180°), anterior flexion of 144° (range 80°-180°), external rotation of 77,5 ° (range 70°-80°) and internal rotation of 54.5° (range 45°-60°). All patients recovered their pre-fracture elbow range of motion. All patients presented less than 10° of angular deviation in varus/valgus or ante/recurvatum after the surgical procedure. At the end of the follow-up, all final functional scores were "good" or "excellent": mean Constant-Murley score was 72 ± 13 (range 38-91), ASES score was 73 ± 12 (range 41-88), UCLA shoulder scale was 30 ± 3,5 (range 10-35), and Q-DASH score was 16.5 ± 0,11 (range 4-57).

CONCLUSION

When applied correctly, the treatment of diaphyseal humeral fractures involving the proximal humerus using a polyaxial locking helical plate with a MIPO technique is a reliable treatment method. It has high union rates with low complications.

Time until union in absolute vs. relative stability MIPO plating in simple humeral shaft fractures

PURPOSE

The objective of this study is to evaluate the effect of absolute stability (AS) versus relative stability (RS) performed through a minimally invasive plate osteosynthesis (MIPO) in AO/OTA 12A1 and 12A2 fractures on healing and the time to radiographic union.

METHODS

This was a retrospective cohort study of all patients treated with plate fixation for AO/OTA type 12A1-A2 fractures at a single institution. Patients were grouped according to the type of stability used in their surgery. Time until radiographic union was estimated using the Kaplan-Meier method, which was compared by long-rank test between both types of surgical techniques.

RESULTS

A total of 70 patients were included in this study with 35 patients in each group. The median follow-up was 9 (IQR 6-14) months. The median time to radiographic union was significantly lower in the AS group than in the RS group: 12 (interquartile range (IQR) 10-14) weeks versus 18 (IQR 16-19) weeks, respectively (p < 0.001). Non-union was seen in two cases (7%) in the relative stability group. Three patients in the RS group developed a post-operative radial nerve palsy.

CONCLUSION

The main finding of this study is that the median time to radiographic union was significantly shorter in the patients treated with AS compared to those with a RS technique. These findings support the recommendations of the AO foundation in that simple metaphyseal fractures (type A) that require surgical treatment should be treated with an AS construct. RS techniques should be reserved to multifragmentary fractures where fragment preservation of blood supply is paramount.

PHILOS Plate Plus Oblique Insertion of Autologous Fibula for 2-Part Proximal Humerus Fractures With Medial Column Disruption: A Retrospective Study

Introduction:

The aim of this retrospective study was to evaluate the outcomes of older patients with 2-part proximal humerus fractures (PHFs) with medial column disruption stabilized using a proximal humeral internal locking system (PHILOS) plate plus oblique insertion of autologous fibula as a primary procedure.

Materials and Methods:

Data involving 112 patients (112 shoulders) sustaining 2-part PHFs with medial column disruption treated with PHILOS plate plus oblique insertion of autologous fibula as a primary procedure during 2012-2019 were identified. The median follow-up was 36 months (range: 11.2-43.5 months). The primary endpoint was the Constant scores and American Shoulder and Elbow Surgeons (ASES) scores. The secondary endpoint was the main orthopedic complication rate.

Results:

The median Constant and ASES scores were 78 (range, 52-95) and 77 (range, 62-96) at the final follow-up, respectively. The main orthopedic complication rate was 10.7% (12/112). Twelve orthopedic complications in 8 patients were detected, and they involved loss of reduction, varus collapse, aseptic loosening, mal-union, revision, and intolerable shoulder pain. Of these complications, 3 (2.6%) involved loss of reduction, 2 (1.7%) involved varus collapse, 3 (2.6%) involved aseptic loosening, 1 (0.8%) involved mal-union, 2 (1.7%) required revision surgery, and 1 (0.8%) presented intolerable shoulder pain.

Conclusion:

PHILOS plate plus oblique insertion of autologous fibula as a primary procedure may yield good functional outcomes and a low rate of the main orthopedic complications.

New precontoured long locking plate for proximal metadiaphyseal fractures of the humerus: a cadaveric study for its use with the minimally invasive technique

Background

The purpose of this study was to identify nerves at risk when using a minimally invasive plate osteosynthesis precontoured long proximal humerus locking plate and to evaluate the risk of injury to deltoid insertion and brachialis muscle.

Methods

Ten cadaveric upper limb specimens were used. A transdeltoid anterolateral approach was performed proximally and a second anterior approach was performed distally. A 14-hole “low” long precountored ALPS locking plate (Biomet Trauma; Zimmer Biomet, Warsaw, IN, USA) was used. Subsequently, anatomic dissection to measure the anatomic relationship of the plate with the deltoid insertion, with the brachialis muscle, and with the axillary, radial, and musculocutaneous nerves was performed.

Results

The mean humeral length was 302 mm (standard deviation 52.3, 99% confidence interval: 259.3-344.6). In 6 specimens, the axillary nerve was located at the level of the third row of holes of the plate; in 3 specimens, at the level of the fourth row; and in one specimen, at the level of the second row. The distance between the plate and the musculocutaneous nerve was on average 10.2 mm (standard deviation 4, 99% confidence interval: 6.9-13.5) and between the plate and the radial nerve was on average 7.9 mm (standard deviation 4.7, 99% confidence interval: 4-11.8). The plate pierced the anterior distal fibers of the deltoid in all specimens. In 8 specimens, no brachialis muscle fibers were located under the plate.

Conclusions

The use of the long precontoured 14-hole ALPS locking plate with the minimally invasive plate osteosynthesis technique, previously identifying the axillary and musculocutaneous nerves, is feasible; however, the distances between the plate and the nerves remain low, so caution should be maintained. Despite the curved design of the plate, the deltoid insertion is partially compromised in all cases.

How Many Proximal Screws Are Needed for a Stable Proximal Humerus Fracture Fixation?

Purpose

This biomechanical study investigates the optimal number of proximal screws for stable fixation of a 2-part proximal humerus fracture model with a locking plate.

Methods

Twenty-four proximal humerus fracture models were included in the study. An unstable 2-part fracture was created and fixed by a locking plate. Cyclic loading and load-to-failure tests were used for the following 4 groups based on the number of screws used: 4-screw, 6-screw, 7-screw, and 9-screw groups. Interfragmentary gaps were measured following cyclic loading and compared. Consequently, the load to failure, maximum displacement, stiffness, and mode of failure at failure point were compared.

Results

The interfragmentary gaps for the 4-screw, 6-screw, 7-screw, and 9-screw groups were significantly reduced by 0.24 ± 0.09 mm, 0.08 ± 0.06 mm, 0.05 ± 0.01 mm, and 0.03 ± 0.01 mm following 1000 cyclic loading, respectively. The loads to failure were significantly different between the groups with the 7-screw group showing the highest load to failure. The stiffness of the 7-screw group was superior compared with the 6-screw, 9-screw, and 4-screw groups. The maximum displacement before failure showed a significant difference between the comparative groups with the 4-screw group having the lowest value. The 7-screw group had the least structural failure rate (33.3%).

Conclusion

At least 7 screws would be optimal for proximal fragment fixation of proximal humerus fractures with medial comminution to minimize secondary varus collapse or fixation failure.

Level of Evidence

Basic science study.

Open Reduction and Long Locking Plate Fixation of Complex Proximal Humeral Metadiaphyseal Fractures

BACKGROUND

A minority of proximal humeral fractures extend into the diaphysis and their optimal treatment remains controversial. We evaluated the outcomes and risk of complications in patients with these injuries, treated by a protocol of open reduction and long locking plate fixation (LPF).

METHODS

Between 2007 and 2014, all locally resident patients with a proximal humeral fracture extending into the diaphysis were referred to a specialist shoulder clinic. Operative treatment using a protocol of open reduction and LPF was offered to medically fit patients. Those with 2-year radiographic follow-up were included in the study, and standardized assessments of clinical and radiographic outcomes were performed during the first 2 years postoperatively. At a mean of 8.8 years (range, 5 to 12 years) after LPF, the functional outcomes and satisfaction of surviving, cognitively intact patients were assessed with a questionnaire study.

RESULTS

One hundred and two patients met the inclusion criteria; the majority were older women who had incurred the injury during a simple fall. Fractures were divided into 2 types depending on the pattern of diaphyseal extension. The pain levels, functional scores, and satisfaction with treatment were satisfactory both at the 2-year follow-up and at the longer-term follow-up at a mean of 8.8 years postsurgery. Complications were predominantly due to postsurgical stiffness (in 7 patients, with 3 undergoing additional surgery) and nonunion or fixation failure (in 7 patients, with 6 undergoing additional surgery).

CONCLUSIONS

Proximal humeral fractures with diaphyseal extension are rare. The results of our study support the use of LPF in medically stable patients in centers with the expertise to perform these procedures.

LEVEL OF EVIDENCE

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

Minimally invasive percutaneous plate osteosynthesis for treatment of proximal humeral shaft fractures

PURPOSE

The objective of this study was to evaluate the feasibility and safety of a minimally invasive percutaneous plate osteosynthesis (MIPPO) procedure for proximal humeral shaft fractures using lateral minimal proximal and distal approaches and lateral bridge plating with primary radial nerve control, and to assess its clinical and radiographic outcomes.

METHODS

A retrospective review was done for the medical records of adult patients admitted for fracture of the proximal humeral shaft without associated injury to the ipsilateral upper limb and who consented to undergo a novel MIPPO technique herein reported. Patients were reviewed at regular follow-up periods and assessed at a final follow-up for evaluation of Constant, normalized Constant, and QuickDASH scores.

RESULTS

There were 21 adult patients with mean age of 56 years. Three patients were lost from early follow-up; one of them had post-operative radial nerve paralysis. Eighteen patients were reviewed for the purpose of this study at a mean of 20 months of final follow-up; among them, one patient developed post-operative radial nerve paralysis with complete recovery after three months. Bone healing was achieved without any malalignment in 17 patients at a mean of 15 weeks, and one patient developed nonunion. At final assessment (mean, 20 months), the mean values of Constant, normalized Constant, and QuickDASH scores were 84 (range, 59 to 100), 95 (range, 73 to 100), and 5 (range, 0 to 18.2) respectively.

CONCLUSION

Compared to pre-reported methods of MIPPO, this technique of lateral proximal and distal mini-approaches with lateral bridge plating after primary control of the radial nerve seems safe and feasible for proximal humeral shaft fractures. It gives good clinical and radiographic results with excellent restoration of upper limb function, very low incidence of post-operative radial nerve injury, and high rate of bone union in good alignment.

PROXIMAL HUMERAL FRACTURES TREATED WITH OSTEOSYNTHESIS USING THE ANTEROLATERAL APPROACH

OBJECTIVE

The main surgical approach in proximal humeral fractures is the deltopectoral approach. Many surgeons avoid the anterolateral approach, fearing its complications, especially axillary nerve injury. The objective of this study is to evaluate shoulder function and complications in patients with proximal humeral fractures treated using an anterolateral approach with direct observation of the axillary nerve.

METHODS

Retrospective study with postoperative radiological and functional evaluations (Constant and DASH scores) and review of the complications. The associations between fracture classification and the difference in Constant scores among the subjects and the final angle of consolidation were analyzed using Fisher's test or analysis of variance (ANOVA). The Constant scores were compared among the shoulders using the paired t-test.

RESULTS

The study evaluated 35 patients. Shoulder function was decreased, compared with the contralateral side (p<0.005). The only factor related to functional worsening was the Neer IV fracture. The main complication was malunion. There were no clinical changes related to the axillary nerve.

CONCLUSION

The treatment using the extended anterolateral approach produced good functional results, although the function was decreased (Neer IV fractures). The main complication was malunion. There were no side effects due to exposure of the axillary nerve. Level of evidence III, Retrospective Study.

Exploring the difficulties to improve minimally invasive application with long PHILOS plate in multifocal metadiaphyseal fractures of the proximal humerus: analysis of intraoperative procedure and clinical outcomes

The MIPO (Minimally Invasive Plate Osteosynthesis) technique for treating metadiaphyseal fractures of the proximal humerus has gained great attention during the past years. The purpose of this retrospective study was to underline all the important difficulties when the MIPO technique is applied, to propose practical solutions and to evaluate the overall clinical outcome of our patients treated with this technique. A total of 14 patients had been operated in two different surgical units, at San Carlo Borromeo Hospital (Milan, Italy - 11 patients) and in Policlinico Umberto I Hospital (Rome, Italy - 3 patients), between June 2013 and November 2016. The humeral fractures were divided according to the Maresca et al. classification system. A lateral deltoid-split or an anterolateral deltopectoral approach was performed in the proximal humerus. In distal approach, an anterior or a lateral window was performed for plate fixation. After a follow-up of 17,4 (range 3-31) months all patients showed fracture healing and there were no non-unions or infected cases. MIPO of the humerus is a tissue sparing technique and in expert hands can improve healing rates and can also reduce complications like nerve damages and infections. In conclusion, we would like to highlight the importance of the MIPO technique as a possible alternative option to the traditional ORIF technique. (www.actabiomedica.it)

Minimally Invasive Plate Osteosynthesis for Treatment of Ankle Fractures in High-Risk Patients

Wound healing problems are the most common complication after open reduction with internal fixation (ORIF) of unstable ankle fractures. The incidence is especially high among elderly patients with medical comorbidities and patients with compromised soft tissues. Minimally invasive plate osteosynthesis (MIPO) might provide a safer alternative to ORIF by preventing extensive soft tissue dissection and preserving the blood supply. We conducted a retrospective review of 44 consecutive patients who had undergone MIPO of unstable ankle fractures. All patients had a minimum 1-year follow-up (mean 82 weeks); 80% were aged ≥60 years, 52% had diabetes, and 45% had a compromised soft tissue envelope. Immediate postoperative radiographs were evaluated for the quality of reduction, and clinical records were analyzed for the complication rate. Good to excellent anatomic reduction was achieved in 89% of the patients. The overall complication rate was 27%, including 25% surgical wound dehiscence, 9% infection, and 11% loss of reduction. No patient experienced nerve injury. Those with a history of ankle fracture dislocation and a compromised soft tissue envelope preoperatively had a significantly greater incidence of surgical wound dehiscence and complications overall compared with those without (p = .016 and p = .035; p = .045 and p = .009, respectively). Peripheral vascular disease was a statistically significant predictor of surgical wound dehiscence (p = .010). The overall complication rate in our study was comparable to that seen in similar populations treated with conventional ORIF. In conclusion, our results suggest that MIPO in high-risk patients is a safe alternative, with predictable outcomes, comparable to those of traditional open techniques.

Complex Proximal Humeral Fracture Fixation with PHILOS Plate using Minimal Invasive Percutaneous Plate Osteosynthesis (MIPPO) Technique: A Series of 30 Patients

Introduction: Proximal humerus fracture fixation using plate osteosynthesis depends on the quality of the bone, design of the fixation devices and intra-operative soft tissue dissection. This study evaluates the functional outcome of minimally invasive percutaneous plate osteosynthesis using locking compression plate in proximal humerus fracture treatment.

Materials and Methods: The study was conducted on 30 patients with complex proximal humerus fractures treated by minimally invasive percutaneous plate osteosynthesis using locking compression plate (PHILOS). There were 21 males and 9 females. The average age of our study group was 58.8 years. All the patients were evaluated at six weeks, three months, four months, six months and 12 months following surgery.

Results: All patients had fracture union at an average of 13.2 weeks. The mean DASH score at the follow-up was 8.69 (2.5 to 17.16), the average range of flexion was 143.83 degrees (100 to 170 degrees) and abduction was 121.49 degrees (90 to 160 degrees). We had superficial infection in three patients which resolved with a short course of antibiotics. There was excellent outcome in 26 patients, good and fair in two patients each.

Conclusion: Proximal humerus fractures treated with minimally invasive percutaneous plate osteosynthesis using locking compression plate with minimal soft tissue dissection, provides good functional outcome and early return of shoulder function.

Rotational evaluation of humeral shaft fractures with proximal extension fixed using the MIPO technique

INTRODUCTION

Diaphyseal fractures with proximal humeral extension can be treated using a helical model, so it is lateral on the proximal aspect and on the diaphyseal segment in the anterior surface.

OBJECTIVE

Our objective was to evaluate possible rotational deviations using minimally invasive plate osteosynthesis (MIPO) and to determine how it affects upper limb function.

METHODS

We followed 11 patients for a period of two years. The proximal approach was anterior-lateral, and the distal approach was anterior, dividing the brachial muscle. For rotational evaluation, we used the semi-axial incidence described by Oztuna et al., assessing the degree of retroversion of the humeral head in relation to the elbow. During follow-up, we measured bilateral range of motion, shoulder function (UCLA), and upper limb function (DASH).

RESULTS

For patients whose final result was an increase in retroversion, there was an average difference of 9°, with an increase in the final difference of external rotation of 3° compared with the other shoulder, and no difference between the final levels of internal rotation. In the patients whose final result was a decrease in retroversion, where the distal fragment was fixed in internal rotation, the difference observed was an average of 6°. These patients had an average decrease of the external rotation of 5° with an increase of the internal rotation by two levels. The final functional scores were "good" and "excellent" in all patients, with a mean UCLA of 31.8 points (28-34) and a mean DASH of 9.11 points (0.83-22.2).

CONCLUSION

In all patients, there was a difference in the humeral head retroversion compared to the contralateral limb, but with little clinical repercussion and good or excellent functional scores.

Management of AO type 12C humerus proximal metadiaphyseal fractures with minimally invasive plate osteosynthesis in geriatric patients

Background

To evaluate the treatment efficacy and complications of the lateral minimally invasive plate osteosynthesis (MIPO) method in geriatric patients with a humerus diaphyseal fracture with proximal extension.

Patients and methods

The study included a total of 21 patients (18 females, 3 males; mean age 74±6.3 years, range 65–89 years) who underwent surgery with the lateral MIPO technique for a humerus diaphyseal fracture with proximal extension during the period January 2011 to December 2016. None of the patients had additional injuries and all completed regular follow-up. According to the Arbeitsgemeinschaft für Osteosynthesefragen/Association for the Study of Internal Fixation classification system, the fractures were evaluated as 12C1 in 17 cases and 12C3 in 4 cases. All patients were evaluated radiologically and functionally at 6 months and 1 year. In the follow-up evaluations, the Constant–Murley score and the Quick Disabilities of the Arm, Shoulder, and Hand (Q-DASH) score were used.

Results

No non-union, avascular necrosis or infection was seen in any patient. The mean time to union was 15.7 weeks. Impingement syndrome was seen in 2 patients and radial nerve palsy in 2 patients. The mean Constant–Murley score was 70.6±10.2 at 6 months and 84±7.6 at the end of 1 year. The mean Q-DASH score was 38.6±15.1 at 6 months and 21.9±13.1 at the end of 1 year. The increase in the Constant–Murley scores from 6 months to 1 year was statistically significant (p<0.0001). The decrease in the Q-DASH scores between 6 months and 1 year was determined to be statistically significant. In the 2 patients with radial nerve palsy, the functions were seen to completely recover during follow-up. No axillary nerve palsy was seen in any patient.

Conclusion

Metadiaphyseal humerus fractures with proximal extension in the elderly can be successfully treated with the lateral MIPO technique. When applied correctly, it is a method with high rates of union and low rates of complications.

Minimally invasive plate osteosynthesis in humerus nonunion after intramedullary nailing

INTRODUCTION

The purpose of this study was to evaluate the results achieved after the use of lateral minimally invasive plate osteosynthesis (MIPO) in oligotrophic humerus nonunions resulting from failed intramedullary nailing (IM).

METHOD

We evaluated nine patients with humerus nonunion after failed locked intramedullary nailing, all treated using 3.5-mm locked compression plates (LCP) placed through lateral minimally invasive approaches, between 2010 and 2016. Patient's age averaged 39.7 years. All nonunions were diaphyseal and oligotrophic. All nonunions had previous surgical treatment with static locked nails (seven antegrade and two retrograde). The IM nails were all well inserted in the humerus (none of them protruded or had rotator cuff lesions associated). Pre-operative Disabilities of the Arm, Shoulder and Hand (DASH) score averaged 25.5 points. Pre-operative Constant's score averaged 80.2. Pre-operative visual analog scale of pain averaged 2.4 points.

RESULTS

Follow-up averaged 17.7 months. Time between initial surgery and revision procedure averaged 11.7 months. Union was achieved in all cases, after an average of 4.8 months. DASH score at last follow-up averaged 5.1 points, and final Constant's score averaged 93.7 points. The analog scale of pain averaged 0.7 points. Time from definitive surgery to work return averaged 3.9 months. Long 3.5-mm LCPs were used (plate length averaged 16.9 screw holes). In two cases, a third 4-cm incision at the nonunion site was performed and cancellous autologous iliac crest bone graft was associated.

CONCLUSION

In our series of nine patients, we achieved union and good objective and subjective results, with high patient satisfaction, using a lateral MIPO technique and placing long 3.5-mm LCPs in selected oligotrophic humerus nonunions after failed IM nailing.

Minimal invasive percutaneous plate osteosynthesis (MIPPO) through deltoid-pectoralis approach for the treatment of elderly proximal humeral fractures

BACKGROUND

Current treatments for proximal humeral fractures include conservative treatment, conventional open reduction internal fixation (ORIF) and MIPPO through deltoid-splitting approach. The aim of this study was to evaluate the clinical outcome of MIPPO versus ORIF via the deltoid-pectoralis approach in elderly patients with proximal humeral fractures.

METHODS

Thirty-six patients with proximal humeral fractures were enrolled in this study. Following the randomized block and single-blinded principle, the patients were assigned to two groups and treated with either conventional ORIF or MIPPO, both through the deltoid-pectoralis approach. Surgical outcomes were evaluated by the NEER score, Constant-Murley score, blood loss, length of operation, radiological imaging and clinical examination. The patients were followed up for 4-24 (mean 10) months.

RESULTS

According to Constant-Murley score, the surgical outcome was excellent in 14 cases, satisfactory in 2 cases and unsatisfactory in one case in MIPPO group versus 10, 5 and 4 in conventional ORIF group. MIPPO was significantly advantageous over conventional ORIF in terms of NEER score, Constant-Murley, length of operation and intraoperative blood loss. In addition, MIPPO was also more advantageous in several indexes in patients with BMI > 26.0 and NEER type III fracture.

CONCLUSION

The results of our study have demonstrated that MIPPO through the deltoid-pectoralis approach is an effective alternative for the treatment of proximal humeral fractures in elderly patients.

TRIAL REGISTRATION

The trial registration number (TRN): ChiCTR-INR-17011098 (retrospectively registered at 2017-04-09).

Minimally invasive lateral plate placement for metadiaphyseal fractures of the humerus and its implications for the distal deltoid insertion- it is not only about the radial nerve. A cadaveric study

INTRODUCTION

Minimally invasive lateral placement of plates on the humerus may be associated with a risk of injury to the radial nerve. Whereas this potential complication has been investigated in several studies, there is no data regarding potential injuries to the distal insertion of the deltoid muscle when the plates are passed distally in a submuscular tunnel.

METHODS

Minimally invasive plate placement was performed on eight arms in fresh cadavers. A lateral deltoid split approach was made and the plates were introduced in an antegrade submuscular manner from proximal to distal. A lateral distal incison was made to adjust the position of the plate at the lateral aspect of the humerus without formal exploration of the radial nerve. The arms were dissected to identify the seven intramuscular tendons of the deltoid and their insertions at the humerus. The position of the plate and its relation to the intramuscular tendons of the deltoid was explored. Furthermore, potential injuries to the axillary and radial nerve were investigated. Damage to the brachialis muscle its interference with plate positioning were explored.

RESULTS

The distal deltoid insertion was affected in all eight examined arms. The two most anterior and two most posterior segments were intact in all. In two arms, the third intramuscular tendon was perforated. In three specimens, the insertion of the fourth segment was damaged. The fifth segment was partially disrupted in three arms. Overall, injuries to the intramuscular tendons were limited to one tendon in all arms. Partial brachial muscle entrapment underneath the plate was observed in four specimens. The axillary nerve was not damaged in any of the examined arms. The radial nerve was entrapped between plate and humeral shaft in one case.

CONCLUSIONS

Lateral plate placement in MIPO technique damages central parts of the distal deltoid muscle insertion. However, the most anterior and posterior tendons are not involved and the clinical significance on muscle function remains unclear. Introduction of the plate without prior distal incision and elevation of the brachial muscle may be associated with partial entrapment of the brachial muscle and a higher risk of injuring the radial nerve.

LEVEL OF EVIDENCE

Experimental study.

Clinic research on the treatment for humeral shaft fracture with minimal invasive plate osteosynthesis: a retrospective study of 128 cases

INTRODUCTION

Minimal invasive plate osteosynthesis (MIPO) is one of the most important techniques in the treatment for humeral shaft fractures. This study was performed to evaluate the efficacy of MIPO technique for the treatment for humeral shaft fractures.

MATERIALS AND METHODS

We retrospectively evaluated 128 cases with humeral shaft fractures that were treated with MIPO technique from March 2005 to August 2008. All the patients were followed up by routine radiological imaging and clinical examinations. Constant-Murley score and HSS elbow joint score were used to evaluate the treatment outcome.

RESULTS

The average duration of the surgery was 60 min (range 40-95 min) without blood transfusion. All fractures healed without infection. All cases recovered carrying angle except four cases with 10°-15° cubitus varus. After the average follow-up of 23 (13-38) months, satisfactory function was achieved according to Constant-Murley score and HSS elbow joint score. Constant-Murley score was 80 on average (range 68-91). According to HSS elbow joint score, there were 123 cases of excellent clinical outcome and five cases of effective outcome.

CONCLUSION

It seems to be a safe and effective method for managing humeral shaft fractures with MIPO technique.

Minimally invasive plate osteosynthesis in distal radius fractures with metaphyseal extension: A series of 13 cases

To evaluate objective and subjective outcomes after minimally invasive volar locked plate fixation of distal radius fractures with metaphyseal extension, we retrospectively evaluated 13 patients with unstable distal radius fractures with metaphyseal extension, treated by minimally invasive volar locked plating. Patients' average age was 41 years. Two volar incisions, 2 to 3cm long, were made; indirect reduction was performed and a volar locked T-plate was placed submuscularly under fluoroscopy guidance. Twelve fractures healed after an average of 2.46 months; one patient needed revision due to a new injury. The plate had to be removed in one patient. On X-rays, radial height averaged 12.78mm, radial inclination averaged 21.34° and volar tilt averaged 8.22°. Flexion averaged 75°, extension 71.5°, pronation 82.08° and supination 83.08°. Grip strength averaged 83.75% of the contralateral wrist. The DASH score averaged 13.91 points and pain assessed on VAS averaged 0.92 points. In unstable distal radius fractures with metaphyseal extension, minimally invasive plate osteosynthesis using volar locked plates led to good reduction and stable fixation, with low pain levels, and good functional and esthetic results. Indirect reduction techniques, fluoroscopy, and restoration of radial length, rotation and alignment, are necessary to achieve these outcomes.

LEVEL OF EVIDENCE

IV.

Clinical results of using minimally invasive long plate osteosynthesis versus conventional approach for extensive comminuted metadiaphyseal fractures of the radius

INTRODUCTION

The minimally invasive plate osteosynthesis (MIPO) technique has been introduced recently. The extensive comminuted fractures of the distal radial metaphysis with diaphyseal involvement are probably good indications for MIPO technique because of less extensive dissection and soft-tissue stripping. The purpose of this retrospective study was to compare the clinical results of MIPO technique to those of conventional open reduction in extensive metadiaphyseal fractures of distal radius.

MATERIALS AND METHODS

Of 34 patients treated for comminuted metadiaphyseal fractures of the distal radius between June 2006 and May 2012, all the patients had extra-articular fractures. Twenty-one patients underwent MIPO technique and 13 underwent conventional open reduction with long periarticular locking plates system (Zimmer). Six patients in the MIPO group and three in the conventional group who had concomitant distal ulnar fractures or distal radioulnar joint (DRUJ) injury underwent plate osteosynthesis or Kirschner-wire fixation before radial fixation. Perioperative parameters and union time were recorded. Radiologic assessment, Mayo Wrist Score, and satisfaction scale were evaluated at the final follow-up.

RESULTS

All fractures united without secondary procedures. Radiologic assessment, Mayo wrist score, and time to union showed no significant difference between the two groups, but the MIPO group had significantly smaller incision wound, higher satisfaction scale, and shorter operative time than did the conventional group.

CONCLUSIONS

MIPO is capable of achieving functional results as good as those of conventional open reduction, with a higher satisfaction scale, smaller incision, and shorter operative time. When MIPO intervention is planned, concurrent distal ulnar fracture or DRUJ injury should be repaired first, thus facilitating subsequent indirect reduction. For treating intra-articular fractures, anatomical reduction of the articular surface is more important, and the MIPO technique described here is not recommended.

Evolving trends in surgically managed patients with proximal humerus fracture: are we different after ten years?

INTRODUCTION

New knowledge, and improved surgical hardware and fixation techniques have changed surgical management. We review the evolving trends of surgically managed proximal humerus fractures.

METHODS

Patients who underwent surgery for proximal humerus fractures from 1 January 2001 to 31 December 2010 were identified from the hospital's electronic diagnosis and operative coding database. Data extracted from the database included patient demographics, comorbidities, clinical and radiological findings, operative techniques, and complications.

RESULTS

In total, 95 patients with 97 surgically managed proximal humerus fractures were identified. The median age of the patients was 50 (range 12-85) years, and the male to female ratio was 1.2:1.0. Male patients tended to present at a younger age than female patients (peak age 30-39 years vs. 70-79 years, p < 0.001). Two-part surgical neck fracture was the most common type of fracture (n = 33, 34.0%). Plate osteosynthesis was predominantly used for two- and three-part surgical neck fractures involving the greater tuberosity (p = 0.03, p = 0.0002, respectively). Hemiarthroplasty was commonly performed for four-part fractures (p < 0.001). Wound infections, implant failure, avascular necrosis of the humeral head and nonunion were seen in 8 (8.3%) cases. Minimally invasive plate osteosynthesis (MIPO) had been in use since 2007 (p < 0.001).

CONCLUSION

Surgically managed proximal humerus fractures predominantly involved young men following high velocity injury and elderly women following osteoporotic fractures. Open plating was most commonly used for two- and three-part fractures, and hemiarthroplasty for four-part fractures. MIPO techniques have been practised in our institution since 2007.

Open reconstruction of complex proximal metadiaphyseal fragility fractures of the humerus

PURPOSE

A proactive surgical and rehabilitation protocol was implemented to manage humeral fractures involving both the proximal end and shaft in an older patient population. Primary treatment goals were early return to function and reliable fracture union with minimal complications.

METHODS

From 2008 to 2012, 21 such operations were performed; 18 were considered "fragility" fractures based on mechanism, patient age, and evidence of osteopenia or osteoporosis. Open reduction and internal fixation (ORIF) was employed using direct reduction and fixation with a long periarticular locking plate. Physiotherapy was commenced 2 weeks postoperatively. The Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire was used to assess functional outcome at a time point greater than 1 year postoperative.

RESULTS

The study group consisted primarily of elderly females (83% with a median age of 69 years) whom sustained complex metadiaphyseal proximal humeral fractures after simple mechanical fall (78%). Uneventful union occurred in all cases. Local complications included 1 case of partial radial nerve palsy, which had resolved completely by 1 year. No cases of infection were identified. Long-term return to functionality was evident with a median DASH score of 12 (mean = 21, standard deviation = 20, n = 13). Seventy five percent of patients reported minimal or no pain (question [Q] 24), and 75% achieved return of overhead function (Q6, 12, and 15).

CONCLUSION

Treatment of complex metadiaphyseal fragility fractures with anatomic reduction, fixed angle plating, and early physiotherapy returns the older patient to optimized functionality with minimal risk of complication. The DASH outcomes are equivalent to ORIF of isolated proximal humerus fractures and clinically indistinguishable from the general population.

Minimally invasive plate osteosynthesis using a helical plate for metadiaphyseal complex fractures of the proximal humerus

Minimally invasive plate osteosynthesis (MIPO) has been used for humeral shaft fractures, but concerns exist about soft tissue injuries. The purpose of this study was to report the surgical technique and clinical outcomes of MIPO using a helical plate for metadiaphyseal complex humeral shaft fractures. Twelve patients with acute displacement involving proximal and middle third humeral shaft fractures (AO type C) were treated using the MIPO technique with a helical plate. Fracture union, complications, and functional outcomes were evaluated using the Constant-Murley score and Mayo Elbow Performance Score (MEPS) at final follow-up. All fractures united at an average of 17.9 weeks. No major complications, such as neurovascular injury, infection, and nonunion, were observed. Mean Constant-Murley and MEPS scores at final follow-up were 88.6 and 97.9, respectively. A MIPO technique using a helical plate can be a useful surgical option for metadiaphyseal complex fractures of the humeral shaft.

Indirect reduction maneuver and minimally invasive approach for displaced proximal humerus fractures in elderly patients

BACKGROUND

This study examined the clinical outcomes of indirect reduction maneuver and minimally invasive approach for treating displaced proximal humerus fractures in patients older than 60.

METHODS

Thirty-two patients (11 male and 21 female) who had undergone treatment for displaced proximal humerus fracture were evaluated. The mean age of the patients was 72.4 years (range, 60 to 92 years). All cases were followed up for at least 12 months. All patients were interviewed and evaluated on the visual analog scale, with gender-specific constant score correction for age, standardized X-rays to check the neck-shaft angle (NSA) and the presence of medial support, and bone mineral density. Statistical analysis was performed with a multiple regression analysis.

RESULTS

The average visual analog scale score was 2.4, and the average gender-specific constant score correction for age was 80.6 points. Final functional outcomes were 8 excellent, 15 good, 7 fair, and 2 poor. The average NSA was 122.8°; and the radiological results were 20 good, 11 fair, and 1 poor. There was significant difference of the gender-specific constant score for age between the group of NSA more than 110° and the group of NSA less than 110° (p = 0.00). There were 26 cases with and 6 cases without medial support, with significant difference between the gender-specific constant score correction for age of these groups (p = 0.01). Complications occurred in 4 patients (12.5%).

CONCLUSIONS

The indirect reduction maneuver and minimally invasive approach were safe and reliable options for the treatment of displaced proximal humerus fractures in the elderly patients. An inadequate reduction (i.e., less than 110° NSA) or lack of medial support (e.g., no cortical or screw support) were significant factors contributing to poor functional outcomes.

[Minimally invasive plating osteosynthesis of proximal humeral shaft fractures with long PHILOS plates]

OBJECTIVE

Closed reduction and minimally invasive stabilization of proximal humeral shaft fractures with long PHILOS plates. The presented technique enables stable extramedullary fixation of the fractures without affecting surrounding nerves.

INDICATIONS

Proximal humeral shaft fractures that may not be fixed by intramedullary nailing because of a narrow, deformed or occupied intramedullary canal or because of open growth plates.

CONTRAINDICATIONS

Fractures that may not be reduced adequately by traction or with percutaneous techniques. Furthermore, fractures with delayed or nonunion and pseudarthrosis should not be treated with this technique.

SURGICAL TECHNIQUE

An anterolateral delta split approach is used to create an epiperiosteal tunnel along the humeral shaft from proximally to distally. A second incision is made distally at the lateral border of the biceps muscle. The brachialis muscle is dissected longitudinally. The PHILOS plate is twisted so that the proximal part of the plate can be placed laterally and the distal part anterolaterally at the humeral shaft. The plate is inserted into the epiperiostal tunnel and fixed with percutaneous screws.

POSTOPERATIVE MANAGEMENT

The arm is immobilized in a Gilchrest bandage until wounds are healed. Active-assisted physiotherapeutic mobilization without loading starts on the first postoperative day. Active mobilization starts 8-12 weeks postoperatively. In cases of soft tissue irritation the PHILOS plate may be removed after 1 year.

RESULTS

Between 2005 and 2011 a total of 16 patients (8 women and 8 men) were treated with the presented technique. The patients mean age was 61 years. According to the AO classification, five fractures were classified as type A, eight as type B and three fractures as type C. All patients had clinical and radiological follow-up examinations after a mean of 24 months (12-38 months). All fractures showed complete bony consolidation at the final follow-up. The mean Constant-Murley score was 81 points representing 84% of the Constant-Murley score of the healthy contralateral shoulder. The average DASH score was 33 points and the mean SF36 was 85 points.

Minimally invasive percutaneous osteosynthesis for proximal humeral shaft fractures with the PHILOS through the deltopectoral approach

PURPOSE

The aim of this study was to evaluate clinical outcomes and complications following minimally invasive plate osteosynthesis (MIPO) with the proximal humeral internal locking system (PHILOS) for treating proximal humeral shaft fracture through the deltopectoral approach.

METHODS

Between November 2008 and March 2010, 74 patients with unilateral proximal humeral shaft fractures were treated using the MIPO technique with the PHILOS through the deltopectoral approach. Patients received an average follow-up of 16.9 (range, 12-24) months, and the final follow-up included anteroposterior and lateral imaging and recording of postoperative complications. The Constant-Murley shoulder score was used to evaluate function.

RESULTS

No intraoperative complications occurred. Postoperative complications included subacromial impingement in four patients. There was no deep infection, neurovascular damage, breakage or implant loosening. All fractures united in an average time of 17.4 (15-25) weeks. In terms of function, the Constant-Murley score was 85.8 points on average (range, 67-100). The range of motion of the involved shoulder was satisfactory, and pain-free in 83.8 % of patients.

CONCLUSIONS

Using the MIPO technique with the PHILOS through the deltopectoral approach is a valid and safe method of treating proximal humeral shaft fractures.

Minimal Invasive Plate Osteosynthesis (MIPO) Technique Using Anterolateral Approach for Treating Closed Proximal Humerus Fracture

ABSTRACT

Proximal humerus fracture is the second most common fracture of the upper extremity and presents several unique problems such as anatomical complexity, high risk of avascular necrosis, minimal bone stock for purchase, significant morbidity, and lack of a universally accepted treatment. Recent treatments for proximal humerus fractures include use of minimally invasive plate osteosynthysis (MIPO). The aim of this cross-sectional study was to evaluate the outcomes of our less invasive technique using a modified anterolateral approach for treatment of proximal humerus fractures. Ten such operative procedures were performed in patients of varying age and with varied mechanism of injury from 2002-2011. All cases were conducted in an acute setting. There were no cases of infection and the functional outcome scores were good. This approach represents an alternative treatment for closed proximal humerus fracture but more extensive studies are needed.

KEY WORDS

Proximal humerus fracture, MIPO, less invasive,anterolateral approach.