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Lv Y, Zhang Z, Qv J, Sheng Q, Zhang J, Piao C. Finite element analysis and biomechanical study of "sandwich" fixation in the treatment of elderly proximal humerus fractures. Front Bioeng Biotechnol 2024; 12:1425643. [PMID: 39040497 PMCID: PMC11260706 DOI: 10.3389/fbioe.2024.1425643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Accepted: 06/19/2024] [Indexed: 07/24/2024] Open
Abstract
Proximal humerus fractures (PHFs) are common in the elderly and usually involve defects in the medial column.The current standard for medial column reconstruction is a lateral locking plate (LLP) in combination with either an intramedullary fibula support or an autogenous fibula graft. However, autogenous fibula graft can lead to additional trauma for patients and allogeneic fibular graft can increase patients' economic burden and pose risks of infection and disease transmission. The primary objective of this study was to introduce and assess a novel "Sandwich" fixation technique and compare its biomechanical properties to the traditional fixation methods for PHFs. In this study, we established finite element models of two different internal fixation methods: LLP-intramedullary reconstruction plate with bone cement (LLP-IRPBC) and LLP-intramedullary fibula segment (LLP-IFS). The biomechanical properties of the two fixation methods were evaluated by applying axial, adduction, abduction, torsional loads and screw extraction tests to the models. These FEA results were subsequently validated through a series of biomechanical experiments. Under various loading conditions such as axial, adduction, abduction, and rotation, the LLP-IRPBC group consistently demonstrated higher structural stiffness and less displacement compared to the LLP-IFS group, regardless of whether the bone was in a normal (Nor) or osteoporotic (Ost) state. Under axial, abduction and torsional loads, the maximum stress on LLPs of LLP-IRPBC group was lower than that of LLP-IFS group, while under adduction load, the maximum stress on LLPs of LLP-IRPBC group was higher than that of LLP-IFS group under Ost condition, and almost the same under Nor condition. The screw-pulling force in the LLP-IRPBC group was 1.85 times greater than that of the LLP-IFS group in Nor conditions and 1.36 times greater in Ost conditions. Importantly, the results of the biomechanical experiments closely mirrored those obtained through FEA, confirming the accuracy and reliability of FEA. The novel "Sandwich" fixation technique appears to offer stable medial support and rotational stability while significantly enhancing the strength of the fixation screws. This innovative approach represents a promising strategy for clinical treatment of PHFs.
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Affiliation(s)
- Yang Lv
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
| | - Ziyan Zhang
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
| | - Ji Qv
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
| | - Qian Sheng
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
| | - Jian Zhang
- Department of Radiology department, The Second Hospital of Jilin University, Changchun, China
| | - Chengdong Piao
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
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Longo UG, Gulotta LV, De Salvatore S, Lalli A, Bandini B, Giannarelli D, Denaro V. Augmented versus non-augmented locking-plate fixation in proximal humeral fractures. Bone Joint J 2024; 106-B:646-655. [PMID: 38945543 DOI: 10.1302/0301-620x.106b7.bjj-2023-1113.r1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
Aims Proximal humeral fractures are the third most common fracture among the elderly. Complications associated with fixation include screw perforation, varus collapse, and avascular necrosis of the humeral head. To address these challenges, various augmentation techniques to increase medial column support have been developed. There are currently no recent studies that definitively establish the superiority of augmented fixation over non-augmented implants in the surgical treatment of proximal humeral fractures. The aim of this systematic review and meta-analysis was to compare the outcomes of patients who underwent locking-plate fixation with cement augmentation or bone-graft augmentation versus those who underwent locking-plate fixation without augmentation for proximal humeral fractures. Methods The search was carried out according to the Preferred Reporting Items for Systematic Reviews and Meta-analyses guidelines. Articles involving patients with complex proximal humeral fractures treated using open reduction with locking-plate fixation, with or without augmentation, were considered. A meta-analysis of comparative studies comparing locking-plate fixation with cement augmentation or with bone-graft augmentation versus locking-plate fixation without augmentation was performed. Results A total of 19 studies were included in the qualitative synthesis, and six comparative studies were included in the meta-analysis. Overall, 120 patients received locking-plate fixation with bone-graft augmentation, 179 patients received locking-plate fixation with cement augmentation, and 336 patients received locking-plate fixation without augmentation. No statistically relevant differences between the augmented and non-augmented cohorts were found in terms of the Disabilities of the Arm, Shoulder and Hand questionnaire score and Constant-Murley Score. The cement-augmented group had a significantly lower rate of complications compared to the non-augmented group. Conclusion While locking-plate fixation with cement augmentation appears to produce a lower complication rate compared to locking-plate fixation alone, functional outcomes seem comparable between augmented and non-augmented techniques.
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Affiliation(s)
- Umile G Longo
- Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
- Research Unit of Orthopaedic and Trauma Surgery, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Lawrence V Gulotta
- Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York, USA
| | - Sergio De Salvatore
- Research Unit of Orthopaedic and Trauma Surgery, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
- IRCCS Istituto Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - Alberto Lalli
- Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
- Research Unit of Orthopaedic and Trauma Surgery, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Benedetta Bandini
- Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
- Research Unit of Orthopaedic and Trauma Surgery, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Diana Giannarelli
- IRCCS Fondazione Policlinico Universitario Agostino Gemelli, Rome, Italy
| | - Vincenzo Denaro
- Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
- Research Unit of Orthopaedic and Trauma Surgery, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
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Ou Z, Feng Q, Peng L, Zhou M, Rai S, Tang X. Risk factors for osteonecrosis of the humeral head after internal fixation of proximal humeral fractures: a systematic review and meta-analysis. Arch Orthop Trauma Surg 2024; 144:31-40. [PMID: 37566131 DOI: 10.1007/s00402-023-05020-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 07/26/2023] [Indexed: 08/12/2023]
Abstract
BACKGROUND Osteonecrosis of the humeral head (ONHH) is a severe complication after the internal fixation of proximal humeral fractures (IFPHF). The risk factors remain controversial though many studies have reported. In this research, meta-analysis was used to evaluate which surgeon-level factors can be modified to lower the risk and we hope to provide evidence-based support for preventing ONHH. METHODS Literature was retrieved from PubMed, Cochrane Library, Embase, Web of Science, and Scopus for eligible studies published up to January 2023. The pooled odds ratios (ORs) were calculated with their corresponding 95% confidence intervals (CIs) to evaluate. STATA 15.1 software was applied for data synthesis, sensitivity synthesis, and publication bias. RESULTS 45 articles were published between 2000 and 2022, and 2482 patients were finally included. All articles were observational research, with 7 case-control studies and 38 cohort studies, and the Newcastle Ottawa Scale (NOS) score ranged from 7 to 9. The pooled results suggested that age (OR 0.32, 95% CI 0.14-0.74, P = 0.01), reduction quality (OR 0.08, 95% CI 0.01-0.44, P = 0.00), fracture type (OR 0.44, 95% CI 0.25-0.78, P = 0.01), surgical approach (OR: 4.06, 95% CI 1.21-13.61, P = 0.02) and fixation implant (OR = 0.68, 95% CI = 0.34-1.33, P = 0.02) were risk factors for ONHH after IFPHF. According to sensitivity analysis, Begg (P = 0.42) and Egger (P = 0.68) tests, the results were stable and exhibited no publication bias. CONCLUSIONS The study showed that age, reduction quality, fracture type, surgical approach and fixation implant were risk factors for ONHH after IFPHF, while gender, varus or valgus, timely operation, injured side, and the existence of medial support have little influence on ONHH, as they could not be considered risk factors and still need further investigations.
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Affiliation(s)
- ZiXuan Ou
- Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - QiYuan Feng
- Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - LianQi Peng
- Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - MinQi Zhou
- Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Saroj Rai
- Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Orthopaedics, Al Ahalia Hospital, Abu Dhabi, United Arab Emirates
| | - Xin Tang
- Department of Orthopaedic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Opperman FLJ, Blaas LS, Pape M, Buijs N, Sterkenburg MV, Yuan JZ, Lameijer CM, Derksen RJ. Fibula allograft in complex three-part and four-part proximal humeral fractures in active patients, a matched case-control study. JSES Int 2024; 8:21-26. [PMID: 38312278 PMCID: PMC10837717 DOI: 10.1016/j.jseint.2023.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2024] Open
Abstract
Background About 20% of proximal humerus fractures (PHFs) are unstable and/or markedly displaced and therefore require surgery. Locking plate fixation after anatomical reduction has become the current treatment of choice for these fractures in the active population. However, studies have shown complication rates up to 36%, such as loss of reduction and avascular necrosis. To date, data from literature are inconclusive on outcomes following the use of an intramedullary fibula allograft in PHFs, possibly due to the case mix. It is hypothesized that the use of a fibula allograft is beneficial to prevent secondary displacement of the fracture in cases where the medial hinge is markedly displaced and unstable, resulting in better clinical and patient reported outcomes. Methods In this multicenter matched cohort study, patients with an unstable, displaced PHF, including anatomic neck fractures and significantly displaced surgical neck fractures, were included. Patients that were treated with a locking plate augmented with a fibula allograft were matched to patients who had undergone locking plate reconstruction without the allograft. The matches were made based on fracture characteristics, age, and performance status. Functional outcomes, Patient Reported Outcome Measures, complications, and radiographic results were compared. Results Twelve patients with fibula allograft augmented osteosyntheses were included and matched to 12 control patients. The mean age was 58 years in the fibula allograft group compared to 62 years in the control group. Minimum follow-up was 12 months. Disability of the Arm Shoulder and Hand score, Constant Shoulder score, abduction, and external rotation were significantly better in the fibula allograft group (17.4 ± 8.6 vs. 26.1 ± 19.2, P = .048; 16.5 ± 11.5 vs. 19.8 ± 16.5 P = .040; mean 127° ± 38° vs. mean 92° ± 49° P = -.045; 50° ± 21° vs. mean 26° ± 23°, P = .004). There was no statistically significant difference in the Oxford Shoulder score between groups (P = .105). The Visual Analog Scale was not significantly different between groups (3.1 ± 1.8 vs. 1.6 ± 1.9, P = .439). Radiographic union was reached in 11 patients of the fibula allograft group compared to 8 in the control group (P = .317). The complication rate was twice as high in the control group (3 vs. 7). Conclusion Additional support of the medial hinge in unstable PHFs with a locking plate in combination with a fibula allograft appears to create a more stable construct without compromising the viability of the articular surface of the head. The use of a fibula allograft in selected complex cases could therefore result in better clinical outcomes with lower complication rates.
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Affiliation(s)
| | - Leanne S. Blaas
- Department of Surgery, Amsterdam UMC, location VUmc, Amsterdam, The Netherlands
- Department of Surgery, Zaandam Medical Center, Zaandam, The Netherlands
| | - Merel Pape
- Department of Surgery, Zaandam Medical Center, Zaandam, The Netherlands
| | - Nikki Buijs
- Department of Surgery, Amsterdam UMC, location VUmc, Amsterdam, The Netherlands
| | | | - Jian Zhang Yuan
- Department of Surgery, Zaandam Medical Center, Zaandam, The Netherlands
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Abd ul Karim MF, S. Hammoudi Z. Biomechanical Analysis of The Effects of Distance Between Bone and Locking Compression Plate on Construct Stability. DIYALA JOURNAL OF ENGINEERING SCIENCES 2022:97-107. [DOI: 10.24237/djes.2022.15409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Bone fractures which are treated, the Locking Compression Plate (LCP) with locked screws is commonly employed. Appropriate distance between the LCP and the bone may enhance periosteal blood supply. Aim: This study aims to determine the effect of distance between the LCP and the bone analogue on the stiffness of the locking compression plate itself using Finite Element Analysis (FEA). Method: To investigate the effect of distance between the LCP and three models bone of transversely fractured tibia, the bone fixed with locked Compression Plate (LCP) containing eight holes each is 4.5 mm using cortex screws. Results: The current study revealed that the stiffness construct will be reduced when the distance between the Locking Compression Plate and the bone analogue increased. Conclusion: To preserve the bone's peripheral blood supply, the plate should be kept at a small distance from the bone during internal fixation.
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Chen H, Chang Z, Zhu Z, Tang P. Treatment of elderly comminuted proximal humeral fracture using endosteal anatomical support system: A case report. Int J Surg Case Rep 2022; 102:107823. [PMID: 36473269 PMCID: PMC9720443 DOI: 10.1016/j.ijscr.2022.107823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 11/26/2022] [Accepted: 11/27/2022] [Indexed: 12/03/2022] Open
Abstract
INTRODUCTION Intramedullary anatomical medial strut with allograft bone (IAMSAB), which accommodates the shape of the proximal humeral cavity and provides rotational stability and direct support to the medial column, was successfully introduced to augment Lateral locking plate (LLP) in the treatment of elderly comminuted proximal humeral fractures. Based on the LLP-IAMSAB construct, a newly titanium endosteal anatomical support system (EASS) was developed. CASE PRESENTATION Reported here is a single case of a highly comminuted proximal humeral fracture. The fractures were treated with EASS. The patient's fracture healed properly. The 24-month follow-up demonstrated no pain and a good functional outcome, with no signs of reduction loss, absorption of greater tuberosity, varus displacement and avascular necrosis of humeral head. CLINICAL DISCUSSION The newly developed EASS had several special considerations contributing to satisfactory surgical outcome. The flat plane construct of the proximal end of the EASS directly support humeral head to prevent varus displacement of the humeral head, instead of the purchase between the screw thread and the cancellous bone inside the humeral head in the nail or plate fixation. Medial anatomical shape of proximal end helps to reduce medial cortex reduction. Greater tuberosity support block with rotator cuff suture fixation might promote greater tuberosity healing and prevent its absorption. However, there is no similar construct in the nail or plate fixation. CONCLUSION The newly developed endosteal anatomical support system might be a promising option in the treatment of elderly comminuted proximal humeral fractures. Although the effectiveness of this system requires additional evaluation upon more patients being treated with this surgical method, the newly developed EASS may serve as a humeral head-preserving method for elderly patients with comminuted proximal humeral fractures.
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Affiliation(s)
- Hua Chen
- The Department of Orthopaedic Surgery, Fourth Medical Center of Chinese PLA General Hospital, China,National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, China,Corresponding authors at: The Department of Orthopaedic Surgery, Fourth Medical Center of Chinese PLA General Hospital, Beijing 100048, China.
| | - Zuhao Chang
- The Department of Orthopaedic Surgery, Fourth Medical Center of Chinese PLA General Hospital, China
| | - Zhengguo Zhu
- The Department of Orthopaedic Surgery, Fourth Medical Center of Chinese PLA General Hospital, China
| | - Peifu Tang
- The Department of Orthopaedic Surgery, Fourth Medical Center of Chinese PLA General Hospital, China,National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, China,Corresponding authors at: The Department of Orthopaedic Surgery, Fourth Medical Center of Chinese PLA General Hospital, Beijing 100048, China.
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Technique and clinical results of a new intramedullary support nail and plate system for fixation of 3- or 4- part proximal humeral fractures in older adults. BMC Musculoskelet Disord 2022; 23:1033. [PMID: 36451141 PMCID: PMC9710141 DOI: 10.1186/s12891-022-05998-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 11/18/2022] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Internal fixation of complex proximal humeral fractures (PHF) with osteoporosis is associated with a high incidence of complications. This study introduces the technique and clinical results of a novel intramedullary support nail and plate system (ISNPs) for the internal fixation of 3- or 4- part PHF in older adults. The ISNPs combines the concept of intramedullary support and dynamic fixation into a locking plate fixation system that can be applied using a minimally invasive surgical approach. METHODS A total of 46 consecutive patients diagnosed with 3- or 4-part PHF that met the criteria were included in this study, including 18 in the ISNPs group and 28 in the conventional locking plate (LP) group. Clinical results, including operative time, intraoperative bleeding, reduction quality, subjective outcome ratings, and complications, were compared between the two groups. Functional outcomes were evaluated using the Constant score and disability of the arm, shoulder, and hand (DASH) questionnaire at 1-year follow-up. RESULTS There were no significant differences in age, sex, local bone quality, Neer-fracture type, and follow-up time between the ISNPs and LP groups. For clinical analysis, there were no significant differences in intraoperative bleeding and operation time between the ISNPs and LP groups. Significant differences were observed in the percentage of the malreduced cases, Constant and DASH score analysis, and the patients' subjective evaluation ('excellent' and 'good' %) between the two groups. CONCLUSION The ISNPs technique proposed in this study provides a novel hybrid internal fixation model for complex PHF with osteoporosis. The clinical results at 1-year follow-up confirmed the advantage of applying it to 3- or 4- part PHF in older patients. Further studies are required to optimize its design and explore its optimal indications.
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Role of Fibular Allograft in Proximal Humerus Fractures: A Systematic Review. J Orthop Trauma 2022; 36:e425-e430. [PMID: 35580343 DOI: 10.1097/bot.0000000000002404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/13/2022] [Indexed: 02/02/2023]
Abstract
OBJECTIVES To analyze the outcomes and complication rates of fibular allografts (FA) as an augmentation technique for proximal humeral fractures and determine their appropriate indications. DATA SOURCES English- and Spanish-language articles in PubMed, MEDLINE, Embase, Web of Science (Core Collection), and Google Scholar databases were systematically reviewed with the Preferred Reporting Items for Systematic Reviews guidelines on April 10, 2020. STUDY SELECTION Studies of patients with proximal humeral fractures treated primarily with FA and locking compression plates and with a minimum follow-up of 6 months were included, and presenting results with standardized clinical scales, radiological values, and operative complications. DATA EXTRACTION Two authors independently extracted data from the selected studies with a standardized data collection form. Subsequently, each extracted data set was consolidated on the agreement of authors. DATA SYNTHESIS From the initial screening of 361 articles, 5 case series and 6 retrospective cohort studies were included. A meta-analysis was not performed. CONCLUSIONS FA improved the clinical and radiological results, thereby reducing complications. The optimal indication for this procedure may be a 4-part fracture with medial column disruption in younger adults. LEVEL OF EVIDENCE Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.
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Handoll HH, Elliott J, Thillemann TM, Aluko P, Brorson S. Interventions for treating proximal humeral fractures in adults. Cochrane Database Syst Rev 2022; 6:CD000434. [PMID: 35727196 PMCID: PMC9211385 DOI: 10.1002/14651858.cd000434.pub5] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Fractures of the proximal humerus, often termed shoulder fractures, are common injuries, especially in older people. The management of these fractures varies widely, including in the use of surgery. This is an update of a Cochrane Review first published in 2001 and last updated in 2015. OBJECTIVES To assess the effects (benefits and harms) of treatment and rehabilitation interventions for proximal humeral fractures in adults. SEARCH METHODS We searched the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, Embase, trial registries, and bibliographies of trial reports and systematic reviews to September 2020. We updated this search in November 2021, but have not yet incorporated these results. SELECTION CRITERIA We included randomised and quasi-randomised controlled trials that compared non-pharmacological interventions for treating acute proximal humeral fractures in adults. DATA COLLECTION AND ANALYSIS: Pairs of review authors independently selected studies, assessed risk of bias and extracted data. We pooled data where appropriate and used GRADE for assessing the certainty of evidence for each outcome. We prepared a brief economic commentary for one comparison. MAIN RESULTS We included 47 trials (3179 participants, mostly women and mainly aged 60 years or over) that tested one of 26 comparisons. Six comparisons were tested by 2 to 10 trials, the others by small single-centre trials only. Twelve studies evaluated non-surgical treatments, 10 compared surgical with non-surgical treatments, 23 compared two methods of surgery, and two tested timing of mobilisation after surgery. Most trials were at high risk of bias, due mainly to lack of blinding. We summarise the findings for four key comparisons below. Early (usually one week post injury) versus delayed (after three or more weeks) mobilisation for non-surgically-treated fractures Five trials (350 participants) made this comparison; however, the available data are very limited. Due to very low-certainty evidence from single trials, we are uncertain of the findings of better shoulder function at one year in the early mobilisation group, or the findings of little or no between-group difference in function at 3 or 24 months. Likewise, there is very low-certainty evidence of no important between-group difference in quality of life at one year. There was one reported death and five serious shoulder complications (1.9% of 259 participants), spread between the two groups, that would have required substantive treatment. Surgical versus non-surgical treatment Ten trials (717 participants) evaluated surgical intervention for displaced fractures (66% were three- or four-part fractures). There is high-certainty evidence of no clinically important difference between surgical and non-surgical treatment in patient-reported shoulder function at one year (standardised mean difference (SMD) 0.10, 95% confidence interval (CI) -0.07 to 0.27; 7 studies, 552 participants) and two years (SMD 0.06, 95% CI -0.13 to 0.25; 5 studies, 423 participants). There is moderate-certainty evidence of no clinically important between-group difference in patient-reported shoulder function at six months (SMD 0.17, 95% CI -0.04 to 0.38; 3 studies, 347 participants). There is high-certainty evidence of no clinically important between-group difference in quality of life at one year (EQ-5D (0: dead to 1: best quality): mean difference (MD) 0.01, 95% CI -0.02 to 0.04; 6 studies, 502 participants). There is low-certainty evidence of little between-group difference in mortality: one of the 31 deaths was explicitly linked with surgery (risk ratio (RR) 1.35, 95% CI 0.70 to 2.62; 8 studies, 646 participants). There is low-certainty evidence of a higher risk of additional surgery in the surgery group (RR 2.06, 95% CI 1.21 to 3.51; 9 studies, 667 participants). Based on an illustrative risk of 35 subsequent operations per 1000 non-surgically-treated patients, this indicates an extra 38 subsequent operations per 1000 surgically-treated patients (95% CI 8 to 94 more). Although there was low-certainty evidence of a higher overall risk of adverse events after surgery, the 95% CI also includes a slightly increased risk of adverse events after non-surgical treatment (RR 1.46, 95% CI 0.92 to 2.31; 3 studies, 391 participants). Open reduction and internal fixation with a locking plate versus a locking intramedullary nail Four trials (270 participants) evaluated surgical intervention for displaced fractures (63% were two-part fractures). There is low-certainty evidence of no clinically important between-group difference in shoulder function at one year (SMD 0.15, 95% CI -0.12 to 0.41; 4 studies, 227 participants), six months (Disability of the Arm, Shoulder, and Hand questionnaire (0 to 100: worst disability): MD -0.39, 95% CI -4.14 to 3.36; 3 studies, 174 participants), or two years (American Shoulder and Elbow Surgeons score (ASES) (0 to 100: best outcome): MD 3.06, 95% CI -0.05 to 6.17; 2 studies, 101 participants). There is very low-certainty evidence of no between-group difference in quality of life (1 study), and of little difference in adverse events (4 studies, 250 participants) and additional surgery (3 studies, 193 participants). Reverse total shoulder arthroplasty (RTSA) versus hemiarthroplasty There is very low-certainty evidence from two trials (161 participants with either three- or four-part fractures) of no or minimal between-group differences in self-reported shoulder function at one year (1 study) or at two to three years' follow-up (2 studies); or in quality of life at one year or at two or more years' follow-up (1 study). Function at six months was not reported. Of 10 deaths reported by one trial (99 participants), one appeared to be surgery-related. There is very low-certainty evidence of a lower risk of complications after RTSA (2 studies). Ten people (6.2% of 161 participants) had a reoperation; all eight cases in the hemiarthroplasty group received a RTSA (very low-certainty evidence). AUTHORS' CONCLUSIONS There is high- or moderate-certainty evidence that, compared with non-surgical treatment, surgery does not result in a better outcome at one and two years after injury for people with displaced proximal humeral fractures. It may increase the need for subsequent surgery. The evidence is absent or insufficient for people aged under 60 years, high-energy trauma, two-part tuberosity fractures or less common fractures, such as fracture dislocations and articular surface fractures. There is insufficient evidence from randomised trials to inform the choices between different non-surgical, surgical or rehabilitation interventions for these fractures.
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Affiliation(s)
- Helen Hg Handoll
- Division of Musculoskeletal and Dermatological Sciences, The University of Manchester, Manchester, UK
- Department of Orthopaedics and Trauma, The University of Edinburgh, Edinburgh, UK
| | - Joanne Elliott
- Division of Musculoskeletal and Dermatological Sciences, The University of Manchester, Manchester, UK
| | - Theis M Thillemann
- Department of Orthopaedics, Shoulder and Elbow Unit, Aarhus University Hospital, Aarhus N, Denmark
| | - Patricia Aluko
- National Institute for Health Research (NIHR) Innovation Observatory, Newcastle University, Newcastle upon Tyne, UK
| | - Stig Brorson
- Centre for Evidence-Based Orthopaedics, Zealand University Hospital and Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
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Nie W, Wang Z, Gu F, Xu S, Yue Y, Shao A, Sun K. Effects of fibular strut augmentation for the open reduction and internal fixation of proximal humeral fractures: a systematic review and meta-analysis. J Orthop Surg Res 2022; 17:322. [PMID: 35729668 PMCID: PMC9210738 DOI: 10.1186/s13018-022-03211-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 06/07/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND There is still a lack of remarkable consensus regarding the clinical efficacy of the application of fibular strut augmentation (FSA) combined with a locking plate for proximal humeral fractures. A systematic review and meta-analysis to assess the effect of the use of FSAs in open reduction and internal fixation of proximal humeral fractures was conducted. METHODS A literature search was conducted in PubMed, Embase, Cochrane, Web of Science Core Collection, and ClinicalTrials.gov to identify trials that compared the clinical outcomes of proximal humeral fractures treated using a locking plate with or without FSA. The primary outcome measures were postoperative complications, radiographical findings, functional recovery scores, and postoperative range of motion (ROM). Data were pooled and analysed using a random-effects model based on the Der Simonian and Laird method. RESULTS Eight studies involving 596 participants were included for further analysis. Compared with using a locking plate independently, the additional application of FSA was associated with the likelihood of lower risk of overall complications (OR 0.37; 95% CI 0.22-0.65; I2 = 12.22%; 95% PI 0.14-0.98) and the rate of patients with orthopaedic complications (OR 0.48; 95% CI 0.25-0.92; I2 = 7.52%; 95% PI 0.16-1.45), less changes in postoperative humeral head height (MD - 2.40; 95% CI - 2.49 to - 2.31; I2 = 0.00%; 95% PI - 2.61 to - 2.20) and the neck-shaft angle (MD - 6.30; 95% CI - 7.23 to - 5.36; I2 = 79.32%; 95% PI - 10.06 to - 2.53), superior functional outcomes (Constant-Murley score: MD 5.07; 95% CI 3.40 to 6.74; I2 = 0.00%; 95% PI 2.361-7.78; American Shoulder and Elbow Surgeons Score: MD 5.08; 95% CI 3.67 to 6.49; I2 = 0.00%; 95% PI 1.98-8.18), and better postoperative ROM in terms of forward elevation and external rotation. However, the evidence regarding postoperative abduction was insufficient. CONCLUSION Meta-analytic pooling of current evidence showed a significant association between the application of FSAs and favourable clinical outcomes in terms of postoperative complications, radiographical findings, functional recovery, and postoperative elevation and external rotation.
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Affiliation(s)
- Wei Nie
- Department of Orthopedic Surgery, Lianyungang 2nd People's Hospital, No. 41 Hailian East Road, Haizhou District, Lianyungang, 222000, Jiangsu, China
| | - Zhaojun Wang
- Department of Orthopedic Surgery, Lianyungang 2nd People's Hospital, No. 41 Hailian East Road, Haizhou District, Lianyungang, 222000, Jiangsu, China
| | - Fei Gu
- Department of Orthopedic Surgery, Lianyungang 2nd People's Hospital, No. 41 Hailian East Road, Haizhou District, Lianyungang, 222000, Jiangsu, China
| | - Shizhuang Xu
- Department of Orthopedic Surgery, Lianyungang 2nd People's Hospital, No. 41 Hailian East Road, Haizhou District, Lianyungang, 222000, Jiangsu, China
| | - Yang Yue
- Department of Orthopedic Surgery, Lianyungang 2nd People's Hospital, No. 41 Hailian East Road, Haizhou District, Lianyungang, 222000, Jiangsu, China
| | - Anze Shao
- Department of Orthopedic Surgery, Lianyungang 2nd People's Hospital, No. 41 Hailian East Road, Haizhou District, Lianyungang, 222000, Jiangsu, China
| | - Kefu Sun
- Department of Orthopedic Surgery, Lianyungang 2nd People's Hospital, No. 41 Hailian East Road, Haizhou District, Lianyungang, 222000, Jiangsu, China.
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Li J, Gao Y, Yin C, Zhang H, Nie S, Guo H, Quan C, Chen H, Zhang W. Stable osteosynthesis of cage in cage technique for surgical treatment of proximal humeral fractures. BMC Surg 2021; 21:233. [PMID: 33947389 PMCID: PMC8094560 DOI: 10.1186/s12893-021-01235-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 04/26/2021] [Indexed: 11/10/2022] Open
Abstract
Background The treatment of a displaced proximal humeral fracture is still a matter of controversy. The purpose of this study was to report outcomes at a long-term follow-up after fixation augmentation using peek (polyether-ether-ketone) cage and locking compression plate (LCP). Methods A total of 27 patients (average age 53.8 years, range 19–86 years) were treated with peek cage and LCP. All of them had a minimum radiographic and clinical follow-up of 1 years. Outcomes were assessed using the Constant-Murley score (CMS), disability of the arm, shoulder and hand (DASH) score. Complications were also recorded during follow-up. Results The average follow-up was 28 months (range 12–48 months). The mean functional outcomes were as follows: CMS, 73.3 (range 61–86); DASH, 45.9 (range 27–68). A total of 4 patients had complications: osteonecrosis developed in one patient, loss of reduction was observed in 1 patient and stiffness was occurred in two patients. Conclusion The use of peek cage and LCP has been a valuable option in the treatment of proximal humeral fractures. The complication rate was acceptable. Suitable void filler in the proximal humerus for reconstructing the medial column integrity attains mechanical stability in reducing the incidence of the complications. Supplementary Information The online version contains supplementary material available at 10.1186/s12893-021-01235-x.
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Affiliation(s)
- Jiantao Li
- Department of Orthopaedics, Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, China.,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China
| | - Yuan Gao
- Department of Nursing, The First Medical Center of Chinese PLA General, Beijing, China
| | - Caixia Yin
- Anesthesia and Operation Center, The First Medical Center of Chinese PLA General, Beijing, China
| | - Hao Zhang
- Department of Orthopaedics, Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, China.,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China
| | - Shaobo Nie
- Department of Orthopaedics, Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, China.,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China
| | - Hui Guo
- Department of Orthopaedics, Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, China.,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China
| | - Chenliang Quan
- Department of Orthopaedics, Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, China.,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China
| | - Hua Chen
- Department of Orthopaedics, Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, China. .,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China.
| | - Wei Zhang
- Department of Orthopaedics, Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, China. .,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China.
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Synthetic Bone Substitutes and Mechanical Devices for the Augmentation of Osteoporotic Proximal Humeral Fractures: A Systematic Review of Clinical Studies. J Funct Biomater 2020; 11:jfb11020029. [PMID: 32380687 PMCID: PMC7353588 DOI: 10.3390/jfb11020029] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 04/25/2020] [Accepted: 04/29/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Different augmentation techniques have been described in the literature in addition to the surgical treatment of proximal humeral fractures. The aim of this systematic review was to analyze the use of cements, bone substitutes, and other devices for the augmentation of proximal humeral fractures. METHODS A systematic review was conducted by using PubMed/MEDLINE, ISI Web of Knowledge, Cochrane Library, Scopus/EMBASE, and Google Scholar databases according the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines over the years 1966 to 2019. The search term "humeral fracture proximal" was combined with "augmentation"; "polymethylmethacrylate, PMMA"; "cement"; "bone substitutes"; "hydroxyapatite"; "calcium phosphates"; "calcium sulfate"; "cell therapies", and "tissue engineering" to find the literature relevant to the topic under review. RESULTS A total of 10 clinical studies considered eligible for the review, with a total of 308 patients, were included. Mean age at the time of injury was 68.8 years (range of 58-92). The most commonly described techniques were reinforcing the screw-bone interface with bone PMMA cement (three studies), filling the metaphyseal void with synthetic bone substitutes (five studies), and enhancing structural support with metallic devices (two studies). CONCLUSION PMMA cementation could improve screw-tip fixation. Calcium phosphate and calcium sulfate injectable composites provided good biocompatibility, osteoconductivity, and lower mechanical failure rate when compared to non-augmented fractures. Mechanical devices currently have a limited role. However, the available evidence is provided mainly by level III to IV studies, and none of the proposed techniques have been sufficiently studied.
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Halvachizadeh S, Berk T, Rauer T, Hierholzer C, Pfeifer R, Pape HC, Allemann F. Treatment of proximal humerus fractures in geriatric patients - Can pathological DEXA results help to guide the indication for allograft augmentation? PLoS One 2020; 15:e0230789. [PMID: 32271792 PMCID: PMC7145012 DOI: 10.1371/journal.pone.0230789] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 03/08/2020] [Indexed: 02/06/2023] Open
Abstract
INTRODUCTION Reconstruction of proximal humerus fracture continues to represent a challenge, especially in severe osteopenia. However, there still is a lack of consensus and clear indication on use of allograft augmentation. Therefore, this study aims to investigate outcome after osteosynthesis with and without allograft augmentation. It focuses on bone density results obtained by DEXA as potential examination that might help decision-making. METHODS This study included patients aged 65 years and older that were treated at one Level 1 trauma center between 2007 and 2018. Inclusion criteria: Proximal humerus fracture treated with or without allograft, conclusive data-sets. Exclusion criteria: prior surgical treatment of the proximal humerus, open fracture with bone loss, neurological damage. Patients were stratified according to the use of allograft augmentation in two groups: Group NA (no allograft augmented PHILOS) and Group A (PHILOS with allograft augmentation). Comorbidity was assessed using the Charlson Comorbidity Index (CCI). Fractures were graded according to the classification by Neer. Radiographic union was analyzed at 6 weeks, 12 weeks, and at year follow up. Complications include surgical site infection, implant failure, humeral head necrosis, or delayed union. Allograft was used in cases of 1inch/3cm3 bone-loss or an egg-shell situation, where the patient refused arthroplasty. RESULTS This study included 167 patients, with 143 (85%) in the Group NA, and 24 (15%) in the Group A. There were no significant differences in age, gender, injury distribution, and distribution of Neer classification or CCI. Patients in Group A had significantly lower T-scores preoperatively (-2.87 ± 1.08 versus -0.9 ± 2.12, p = 0.003). No difference occurred in any of the complications. At one-year follow-up, the range of motion was comparable in both groups. CONCLUSION In patients with allograft augmentation and severe osteopenia, similar clinical and radiological results were obtained when compared with patients with better preoperative bone density scores (T-scores, DEXA). In view of a lack of guidelines indicating the indication for the use of allograft, this difference may be worth further study.
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Affiliation(s)
- Sascha Halvachizadeh
- Department of Trauma, University Zurich, UniversitätsSpital Zürich, Zurich, Switzerland
| | - Till Berk
- Department of Trauma, University Zurich, UniversitätsSpital Zürich, Zurich, Switzerland
| | - Thomas Rauer
- Department of Trauma, University Zurich, UniversitätsSpital Zürich, Zurich, Switzerland
| | - Christian Hierholzer
- Department of Trauma, University Zurich, UniversitätsSpital Zürich, Zurich, Switzerland
| | - Roman Pfeifer
- Department of Trauma, University Zurich, UniversitätsSpital Zürich, Zurich, Switzerland
| | - Hans-Christoph Pape
- Department of Trauma, University Zurich, UniversitätsSpital Zürich, Zurich, Switzerland
| | - Florin Allemann
- Department of Trauma, University Zurich, UniversitätsSpital Zürich, Zurich, Switzerland
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邢 飞, 段 鑫, 刘 明, 黄 富, 项 舟. [Research progress in treatment of proximal humeral fracture with fibular allograft and locking plate]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2020; 34:260-265. [PMID: 32030961 PMCID: PMC8171967 DOI: 10.7507/1002-1892.201906104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 11/21/2019] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To review the research progress in the treatment of proximal humeral fractures with fibular allograft and locking plate. METHODS The literature about the treatment of proximal humeral fractures with fibular allograft and locking plate was reviewed and analyzed from the aspects such as the biomechanics, imaging prognosis, and clinical prognosis. RESULTS Fibular allograft and locking plate can provide effective medial support for proximal humeral fracture and increase the strength of internal fixation system. Compared with locking plate, fibular allograft combined with locking plate can maintain better humeral neck-shaft angle and the humeral head height after operation in the treatment of proximal humeral fractures, and has better shoulder mobility and shoulder joint function, and does not increase the risk of complications. CONCLUSION Fibular allograft combined with locking plate may be a new and effective treatment for proximal humeral fractures. However, the long-term follow-up results are insufficient, the final outcome of fibula is uncertain, and the long-term potential adverse reactions caused by this treatment are still indefinite.
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Affiliation(s)
- 飞 邢
- 四川大学华西医院骨科(成都 610041)Department of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - 鑫 段
- 四川大学华西医院骨科(成都 610041)Department of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - 明 刘
- 四川大学华西医院骨科(成都 610041)Department of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - 富国 黄
- 四川大学华西医院骨科(成都 610041)Department of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - 舟 项
- 四川大学华西医院骨科(成都 610041)Department of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
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Panagiotopoulou VC, Varga P, Richards RG, Gueorguiev B, Giannoudis PV. Late screw-related complications in locking plating of proximal humerus fractures: A systematic review. Injury 2019; 50:2176-2195. [PMID: 31727401 DOI: 10.1016/j.injury.2019.11.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/31/2019] [Indexed: 02/07/2023]
Abstract
Locking plating is a common surgical treatment of proximal humeral fractures with satisfactory clinical results. Implant-related complications, especially screw-related, have been reported, however, the lack of information regarding their onset, used surgical technique, complexity of the fracture, bone quality etc., prevents from understanding the causes for them. The aim of this systematic review is to identify the potential risk factors for late screw complications by gathering information about the patient characteristics, comorbidities, fracture types, surgical approaches and implant types. A PubMed search was performed using humerus, fractures, bone and locking as keywords in clinical papers written in English. All abstracts and manuscripts on distal or humerus shaft fractures, and those on proximal humerus fractures without any or with only iatrogenic complications were excluded. One hundred studies met the inclusion criteria, resulting in 33% of the reported cases having at least one complication, with 11% of all complications being screw-related. Most of the latter were secondary screw perforations and screw cut-outs, being predominantly linked to poor bone quality, while screw loosening and retraction were found less frequently as a result of locking mechanism failure. Overall, the amount of information for complications was limited and screw perforation was the most frequent screw-related complication, mostly reported in female patients older than 50 years, following four-part or AO/OTA type C fractures and detected four weeks postoperatively. The sparse information in the literature could be an indicator that the late screw complications might have been under-reported and under-described, making the understanding of the screw-related complications even more challenging.
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Affiliation(s)
- Vasiliki C Panagiotopoulou
- AO Research Institute Davos, Davos, Switzerland; School of Chemical and Processing Engineering, Engineering Building, University of Leeds, UK.
| | - Peter Varga
- AO Research Institute Davos, Davos, Switzerland
| | | | | | - Peter V Giannoudis
- Academic Department of Trauma and Orthopaedic, School of Medicine, University of Leeds, Leeds General Infirmary, Leeds, UK; NIHR Leeds Biomedical Research Center, Chapel Allerton Hospital, Leeds, UK
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Augmentation of plate osteosynthesis for proximal humeral fractures: a systematic review of current biomechanical and clinical studies. Arch Orthop Trauma Surg 2019; 139:1075-1099. [PMID: 30903343 DOI: 10.1007/s00402-019-03162-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Indexed: 02/09/2023]
Abstract
INTRODUCTION Secondary dislocation due to loss of fixation is the most common complication after plate fixation of proximal humeral fractures. A wide range of different techniques for augmentation has been described to improve the primary and secondary stability. Nevertheless, comparative analyses on the specific advantages and limitations are missing. Therefore, the aim of the present article was to systematically review and evaluate the current biomechanical and clinical studies. MATERIALS AND METHODS The databases of PubMed and EMBASE were comprehensively searched for studies on augmentation techniques for proximal humeral fractures using defined search terms. Subsequently, all articles identified were screened for eligibility and subdivided in either clinical or biomechanical studies. Furthermore, the level of evidence and study quality were assessed according the Oxford Centre for Evidence-Based Medicine and the Coleman Methodology Score, respectively. RESULTS Out of 2788, 15 biomechanical and 30 clinical studies were included. The most common techniques were structural allogenic or autologous bone grafting to enhance the medial support, metaphyseal void filling utilizing synthetic bone substitutes or bone grafts, and screw-tip augmentation with bone cement. Biomechanical data were available for structural bone grafting to enhance the medial support, void filling with synthetic bone substitutes, as well as for screw-tip augmentation. Clinical evidence ranged from level II-IV and study quality was 26-70/100 points. Only one clinical study was found investigating screw-tip augmentation. All studies included revealed that any kind of augmentation positively enhances mechanical stability, reduces the rate of secondary dislocation, and improves patients' clinical outcome. None of the studies showed relevant augmentation-associated complication rates. CONCLUSIONS Augmentation of plate fixation for proximal humeral fractures seems to be a reliable and safe procedure. All common techniques mechanically increase the constructs' stability. Clinically evaluated procedures show reduced complication rates and improved patient outcomes. Augmentation techniques seem to have the highest significance in situations of reduced bone mineral density and in high-risk fractures, such as 4-part fractures. However, more high-quality and comparative clinical trials are needed to give evidence-based treatment recommendations.
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