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McGinnity-Hamze G, Hatamleh MM. Is Polyetheretherketone an Effective Alloplastic Material in Comparison to Titanium in Calvarial Reconstruction. J Craniofac Surg 2024; 35:1517-1522. [PMID: 38814081 DOI: 10.1097/scs.0000000000010335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 05/01/2024] [Indexed: 05/31/2024] Open
Abstract
INTRODUCTION AND AIM Polyetheretherketone (PEEK) and titanium (Ti) cranioplasty implants ideal outcomes are good esthetics, long-term stability, and protection of the fragile brain tissue. However, it is unclear whether PEEK implants can offer an equal alternative to Ti implants. This work aimed to critically review papers and case series published on both Ti and PEEK Cranioplasty regarding complications, clinical outcomes, ease of use, esthetics, manufacture and availability, cost and time-saving factors, postoperative quality of life (QOL), as well as their suitability for the fronto-orbito region reconstruction. METHODS PubMed database was sourced for published literature in the period 2007 to the end of 2023; a further manual search for articles was carried out on the reference lists of each paper. RESULTS A total of 48980 papers were found during the initial search, but only 33 articles met the inclusion criteria. A total of 6023 cranial implants, with 3879 being Ti and 1205 PEEK. Titanium was the material of choice in over 64.4% of cases; however, Ti has been in application for many years compared to PEEK. Out of the 33 papers, there was 27 retrospective cohort/analysis/case series and reviews: 1 meta-analysis, 2 systematic reviews and 3 randomized control trials. Four articles commented on the QOL, 15 on esthetics, 7 discussed cost and time-saving without measurable variables, and 7 articles looked explicitly at the complex fronto-orbito region, of which 49% were primary 1-stage surgical reconstructions, 54% were reconstructed with PEEK and 7% Ti (CAD/CAM). CONCLUSION There is no absolute consensus for the preference of either material, however, in the fronto-orbito region, PEEK is the material of choice for ease of use, esthetics, and time-saving. However, there are no long-term studies on PEEK cranioplasty, and fewer in comparison with Ti implants. Further research is required in this field. No reliable or measurable data was found to determine the QOL, esthetics, cost, or time-saving elements.
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Affiliation(s)
- Gráinne McGinnity-Hamze
- Cranio-Maxillofacial Prosthetics Unit, Department of Oral and Maxillofacial Surgery, King's College Hospital NHS Foundation Trust, London, UK
| | - Muhanad M Hatamleh
- Department of Allied Dental Sciences, Faculty of Applied Medical Sciences, Jordan University of Science and Technology, Irbid, Jordan
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Prajapati HP, Singh DK. A Single Standard Polyvinyl Chloride 3D Skull Model to Create the Polymethyl Methacrylate Cranioplasty Flap: A Novel and Low-Cost Technique. J Neurol Surg A Cent Eur Neurosurg 2024. [PMID: 38621709 DOI: 10.1055/s-0044-1785648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
BACKGROUND Although, cranioplasty is a commonly performed neurosurgical procedure worldwide, the cost of available cranioplasty implants is a major issue in a low-income country like India. The aims of this study were to introduce a novel and low-cost technique using a single standard three-dimensional (3D) skull model to guide the polymethyl methacrylate (PMMA) cranioplasty flap production and to evaluate the functional and cosmetic outcomes. METHODS We retrospectively evaluated 47 cases of PMMA cranioplasty in the period from February 2019 to June 2022. A single standard 3D skull model was used to make the PMMA cranioplasty flaps. The overall cost of this PMMA implant was compared with that of other available cranioplasty implants. The functional and cosmetic outcomes were evaluated postoperatively. RESULTS The mean age of our patients was 37.17 ± 13.83 years and the age range was 17 to 63 years. The primary cause of surgery was trauma in the majority of cases (n = 31, 65.96%). The mean operative time was 78.55 ± 19.82 minutes. The cosmetic results were very satisfying in 46 of 47 (97.87%) patients and moderately satisfying in 1 (2.12%) patient. Overall, there were three (6.38%) complications. CONCLUSION Our technique provides excellent functional and cosmetic outcomes. The overall surgical cost of these PMMA implants was lower than that of the other available cranioplasty implants. This technique is currently the most cost-effective option for cranioplasty.
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Affiliation(s)
- Hanuman Prasad Prajapati
- Department of Neurosurgery, Uttar Pradesh University of Medical Sciences, Saifai, Etawah, Uttar Pradesh, India
| | - Deepak Kumar Singh
- Department of Neurosurgery, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
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Iratwar S, Roy Chowdhury S, Pisulkar S, Das S, Agarwal A, Bagde A, Paikrao B, Quazi S, Basu B. Comprehensive functional outcome analysis and importance of bone remodelling on personalized cranioplasty treatment using Poly(methyl methacrylate) bone flaps. J Biomater Appl 2024; 38:975-988. [PMID: 38423069 DOI: 10.1177/08853282241235884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Cranioplasty involves the surgical reconstruction of cranial defects arising as a result of various factors, including decompressive craniectomy, cranial malformations, and brain injury due to road traffic accidents. Most of the modern decompressive craniectomies (DC) warrant a future cranioplasty surgery within 6-36 months. The conventional process of capturing the defect impression and polymethyl methacrylate (PMMA) flap fabrication results in a misfit or misalignment at the site of implantation. Equally, the intra-operative graft preparation is arduous and can result in a longer surgical time, which may compromise the functional and aesthetic outcomes. As part of a multicentric pilot clinical study, we recently conducted a cohort study on ten human subjects during 2019-2022, following the human ethics committee approvals from the participating institutes. In the current study, an important aspect of measuring the extent of bone remodelling during the time gap between decompressive craniectomy and cranioplasty was successfully evaluated. The sterilised PMMA bone flaps were implanted at the defect area during the cranioplasty surgery using titanium mini plates and screws. The mean surgery time was 90 ± 20 min, comparable to the other clinical studies on cranioplasty. No signs of intra-operative and post-operative complications, such as cerebrospinal fluid leakage, hematoma, or local and systemic infection, were clinically recorded. Importantly, aesthetic outcomes were excellent for all the patients, except in a few clinical cases, wherein the PMMA bone flap was to be carefully customized due to the remodelling of the native skull bone. The extent of physiological remodelling was evaluated by superimposing the pre-operative and post-operative CT scan data after converting the defect morphology into a 3D model. This study further establishes the safety and efficacy of a technologically better approach to fabricate patient-specific acrylic bone flaps with improved surgical outcomes. More importantly, the study outcome further demonstrates the strategy to address bone remodelling during the patient-specific implant design.
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Affiliation(s)
- Sandeep Iratwar
- Department of Neurosurgery, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education & Research, Wardha, India
| | | | - Shweta Pisulkar
- Department of Prosthodontics, Crown & Bridge, Sharad Pawar Dental College, Datta Meghe Institute of Higher Education & Research, Wardha, India
| | - Soumitra Das
- Material Research Centre, Indian Institute of Science, Bangalore, India
| | - Akhilesh Agarwal
- Bio-Innovation cell, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education & Research, Wardha, India
| | - Ashutosh Bagde
- Faculty of Engineering Technology, Biomedical Engineering/and Research Scientist, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education & Research, Wardha, India
| | - Balaji Paikrao
- Department of Mechanical Engineering, Visvesvaraya National Institute of Technology, Nagpur, India
| | - Syed Quazi
- Department of Community Medicine, Jawaharlal Nehru Medical College, Datta Meghe Institute of Medical Sciences (Deemed to be University), Wardha, India
| | - Bikramjit Basu
- Material Research Centre, Indian Institute of Science, Bangalore, India
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Bečulić H, Spahić D, Begagić E, Pugonja R, Skomorac R, Jusić A, Selimović E, Mašović A, Pojskić M. Breaking Barriers in Cranioplasty: 3D Printing in Low and Middle-Income Settings-Insights from Zenica, Bosnia and Herzegovina. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1732. [PMID: 37893450 PMCID: PMC10608598 DOI: 10.3390/medicina59101732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 09/16/2023] [Accepted: 09/26/2023] [Indexed: 10/29/2023]
Abstract
Background and Objectives: Cranial defects pose significant challenges in low and middle-income countries (LIMCs), necessitating innovative and cost-effective craniofacial reconstruction strategies. The purpose of this study was to present the Bosnia and Herzegovina model, showcasing the potential of a multidisciplinary team and 3D-based technologies, particularly PMMA implants, to address cranial defects in a resource-limited setting. Materials and Methods: An observational, non-experimental prospective investigation involved three cases of cranioplasty at the Department of Neurosurgery, Cantonal Hospital Zenica, Bosnia and Herzegovina, between 2019 and 2023. The technical process included 3D imaging and modeling with MIMICS software (version 10.01), 3D printing of the prototype, mold construction and intraoperative modification for precise implant fitting. Results: The Bosnia and Herzegovina model demonstrated successful outcomes in cranioplasty, with PMMA implants proving cost-effective and efficient in addressing cranial defects. Intraoperative modification contributed to reduced costs and potential complications, while the multidisciplinary approach and 3D-based technologies facilitated accurate reconstruction. Conclusions: The Bosnia and Herzegovina model showcases a cost-effective and efficient approach for craniofacial reconstruction in LIMICs. Collaborative efforts, 3D-based technologies, and PMMA implants contribute to successful outcomes. Further research is needed to validate sustained benefits and enhance craniofacial reconstruction strategies in resource-constrained settings.
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Affiliation(s)
- Hakija Bečulić
- Department of Neurosurgery, Cantonal Hospital Zenica, 72000 Zenica, Bosnia and Herzegovina
- Department of Anatomy, School of Medicine, University of Zenica, 72000 Zenica, Bosnia and Herzegovina; (R.S.); (A.M.)
| | - Denis Spahić
- Department of Constructions and CAD Technologies, School of Mechanical Engineering, University of Zenica, 72000 Zenica, Bosnia and Herzegovina;
- iDEAlab, School of Mechanical Engineering, University of Zenica, 72000 Zenica, Bosnia and Herzegovina
| | - Emir Begagić
- Deparment of General Medicine, School of Medicine, University of Zenica, 72000 Zenica, Bosnia and Herzegovina;
| | - Ragib Pugonja
- Deparment of General Medicine, School of Medicine, University of Zenica, 72000 Zenica, Bosnia and Herzegovina;
| | - Rasim Skomorac
- Department of Anatomy, School of Medicine, University of Zenica, 72000 Zenica, Bosnia and Herzegovina; (R.S.); (A.M.)
- Department of Surgery, School of Medicine, University of Zenica, 72000 Zenica, Bosnia and Herzegovina;
| | - Aldin Jusić
- Department of Anatomy, School of Medicine, University of Zenica, 72000 Zenica, Bosnia and Herzegovina; (R.S.); (A.M.)
| | - Edin Selimović
- Department of Surgery, School of Medicine, University of Zenica, 72000 Zenica, Bosnia and Herzegovina;
| | - Anes Mašović
- Department of Anatomy, School of Medicine, University of Zenica, 72000 Zenica, Bosnia and Herzegovina; (R.S.); (A.M.)
| | - Mirza Pojskić
- Department of Neurosurgery, University Hospital Marburg, Baldinger Str., 35033 Marburg, Germany
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Klieverik VM, Robe PA, Muradin MS, Woerdeman PA. Cosmetic satisfaction and patient-reported outcome measures following cranioplasty after craniectomy - A prospective cohort study. BRAIN & SPINE 2023; 3:101767. [PMID: 37383454 PMCID: PMC10293317 DOI: 10.1016/j.bas.2023.101767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 06/10/2023] [Accepted: 06/12/2023] [Indexed: 06/30/2023]
Abstract
Introduction Evaluating patient-reported outcomes (PROMs) helps optimize preoperative counseling and psychosocial care for patients who underwent cranioplasty. Research question This study aimed to evaluate cosmetic satisfaction, level of self-esteem, and fear of negative evaluation (FNE) of patients who underwent cranioplasty. Material and methods Patients who underwent cranioplasty from 1 January 2014 to 31 December 2020 at University Medical Center Utrecht and a control group consisting of our center' employees were invited to fill out the Craniofacial Surgery Outcomes Questionnaire (CSO-Q), consisting of an assessment of cosmetic satisfaction, the Rosenberg Self-Esteem Scale (RSES), and the FNE scale. To test for differences in results, chi-square tests and T-tests were performed. Logistic regression was used to study the effect of cranioplasty-related variables on cosmetic satisfaction. Results Cosmetic satisfaction was seen in 44/80 patients (55.0%) and 52/70 controls (74.3%) (p = 0.247). Thirteen patients (16.3%) and 8 controls (11.4%) had high self-esteem (p = 0.362), 51 patients (63.8%) and 59 controls (84.3%) had normal self-esteem (p = 0.114), and 7 patients (8.8%) and 3 controls (4.3%) had low self-esteem (p = 0.337). Forty-nine patients (61.3%) and 39 controls (55.7%) had low FNE (p = 0.012), 8 patients (10.0%) and 18 controls (25.7%) had average FNE (p = 0.095), and 6 patients (7.5%) and 13 controls (18.6%) had high FNE (p = 0.215). Cosmetic satisfaction was associated with glass fiber-reinforced composite implants (OR 8.20, p-value = 0.04). Discussion and conclusion This study prospectively evaluated PROMs following cranioplasty, for which we found favorable results.
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Affiliation(s)
- Vita M. Klieverik
- Department of Neurology and Neurosurgery, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Pierre A. Robe
- Department of Neurology and Neurosurgery, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Marvick S.M. Muradin
- Department of Oral and Maxillofacial Surgery, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Peter A. Woerdeman
- Department of Neurology and Neurosurgery, University Medical Center Utrecht, Utrecht, the Netherlands
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Patient assessment of cosmetic outcome after craniotomy for intracranial tumor surgery. INTERDISCIPLINARY NEUROSURGERY 2023. [DOI: 10.1016/j.inat.2023.101752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023] Open
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Ebel F, Schön S, Sharma N, Guzman R, Mariani L, Thieringer FM, Soleman J. Clinical and patient-reported outcome after patient-specific 3D printer-assisted cranioplasty. Neurosurg Rev 2023; 46:93. [PMID: 37074490 PMCID: PMC10115682 DOI: 10.1007/s10143-023-02000-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 03/16/2023] [Accepted: 04/08/2023] [Indexed: 04/20/2023]
Abstract
Various cranioplasty techniques exist for the reconstruction of cranial bone defects. Patient-specific implants can be produced in-house using a recently developed 3D printer-assisted cranioplasty technique. However, the resulting cosmetic outcomes from the patient's perspective are underreported. With our case series, we aim to present the clinical outcome, morbidity rate, patient-reported cosmetic results, and cost-effectiveness of patient-specific3D printer-assisted cranioplasty technique. This is a consecutive retrospective case series of adult patients undergoing cranioplasty using the patient-specific 3D printer-assisted technique. As primary endpoint, the functional outcome based on modified Rankin scale (mRS) at discharge and follow-up was assessed. A prospective telephone survey was conducted to collect and provide patient-reported outcomes. Thirty-one patients underwent patient-specific 3D printer-assisted cranioplasty, mostly to reconstruct frontotemporoparietal (61.3%) and frontotemporal defects with orbital involvement (19.4%). Good functional outcome (mRS ≤ 2) at discharge and during the last follow-up was achieved in 54.8% (n = 17) and 58.1% (n = 18) patients. Overall, the rate of clinically relevant surgery-related complications was 35.5% (n = 11). Postoperative epidural hematoma/collection (16.1%) and infections (12.9%) were the most frequent complications. Permanent morbidity occurred in one patient (3.2%) with postoperative acute ipsilateral vision loss after frontotemporal cranioplasty with orbital involvement. No surgery-related mortality occurred. The mean patient-reported cosmetic satisfaction score was 7.8 ± 1.5, with 80% of patients reporting satisfying or very satisfying cosmetic results. No significant differences were seen between the different defect localization regarding the cosmetic outcome. The mean manufacturing costs of a patient-specific 3D printer-assisted implant ranged from 748 to 1129 USD. Based on our case series, patient-specific 3D printer-assisted cranioplasty is cost-effective and leads to satisfying cosmetic results, especially in large defects and/or defects with complex geometry.
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Affiliation(s)
- Florian Ebel
- Department of Neurosurgery, University Hospital of Basel, Basel, Switzerland.
| | - Stephan Schön
- Department of Neurosurgery, University Hospital of Basel, Basel, Switzerland
| | - Neha Sharma
- Department of Oral & Cranio-Maxillo-Facial Surgery and 3D Print Lab, University Hospital of Basel, Basel, Switzerland
- Medical Additive Manufacturing Research Group (Swiss MAM/Smart Implants), Department of Biomedical Engineering, University of Basel, Allschwil, Switzerland
| | - Raphael Guzman
- Department of Neurosurgery, University Hospital of Basel, Basel, Switzerland
- Department of Pediatric Neurosurgery, University Children's Hospital of Basel, Basel, Switzerland
- Faculty of Medicine, University of Basel, Basel, Switzerland
| | - Luigi Mariani
- Department of Neurosurgery, University Hospital of Basel, Basel, Switzerland
- Faculty of Medicine, University of Basel, Basel, Switzerland
| | - Florian M Thieringer
- Department of Oral & Cranio-Maxillo-Facial Surgery and 3D Print Lab, University Hospital of Basel, Basel, Switzerland
- Medical Additive Manufacturing Research Group (Swiss MAM/Smart Implants), Department of Biomedical Engineering, University of Basel, Allschwil, Switzerland
- Faculty of Medicine, University of Basel, Basel, Switzerland
| | - Jehuda Soleman
- Department of Neurosurgery, University Hospital of Basel, Basel, Switzerland
- Department of Pediatric Neurosurgery, University Children's Hospital of Basel, Basel, Switzerland
- Faculty of Medicine, University of Basel, Basel, Switzerland
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Steiert C, Behringer SP, Kraus LM, Bissolo M, Demerath T, Beck J, Grauvogel J, Reinacher PC. Augmented reality-assisted craniofacial reconstruction in skull base lesions - an innovative technique for single-step resection and cranioplasty in neurosurgery. Neurosurg Rev 2022; 45:2745-2755. [PMID: 35441994 PMCID: PMC9349131 DOI: 10.1007/s10143-022-01784-6] [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: 01/08/2022] [Revised: 03/19/2022] [Accepted: 03/30/2022] [Indexed: 10/31/2022]
Abstract
Defects of the cranial vault often require cosmetic reconstruction with patient-specific implants, particularly in cases of craniofacial involvement. However, fabrication takes time and is expensive; therefore, efforts must be made to develop more rapidly available and more cost-effective alternatives. The current study investigated the feasibility of an augmented reality (AR)-assisted single-step procedure for repairing bony defects involving the facial skeleton and the skull base. In an experimental setting, nine neurosurgeons fabricated AR-assisted and conventionally shaped ("freehand") implants from polymethylmethacrylate (PMMA) on a skull model with a craniofacial bony defect. Deviations of the surface profile in comparison with the original model were quantified by means of volumetry, and the cosmetic results were evaluated using a multicomponent scoring system, each by two blinded neurosurgeons. Handling the AR equipment proved to be quite comfortable. The median volume deviating from the surface profile of the original model was low in the AR-assisted implants (6.40 cm3) and significantly reduced in comparison with the conventionally shaped implants (13.48 cm3). The cosmetic appearance of the AR-assisted implants was rated as very good (median 25.00 out of 30 points) and significantly improved in comparison with the conventionally shaped implants (median 14.75 out of 30 points). Our experiments showed outstanding results regarding the possibilities of AR-assisted procedures for single-step reconstruction of craniofacial defects. Although patient-specific implants still represent the gold standard in esthetic aspects, AR-assisted procedures hold high potential for an immediately and widely available, cost-effective alternative providing excellent cosmetic outcomes.
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Affiliation(s)
- Christine Steiert
- Department of Neurosurgery, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
| | - Simon Phillipp Behringer
- Department of Neurosurgery, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Luisa Mona Kraus
- Department of Neurosurgery, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Marco Bissolo
- Department of Neurosurgery, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Theo Demerath
- Department of Neuroradiology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Juergen Beck
- Department of Neurosurgery, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Juergen Grauvogel
- Department of Neurosurgery, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Peter Christoph Reinacher
- Department of Stereotactic and Functional Neurosurgery, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Fraunhofer Institute for Laser Technology, Aachen, Germany
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Accelerated Cranioplasty with Perforator-preserved Split Flap Sandwiched Plate for Treatment of Infected Cranial Defects. Plast Reconstr Surg Glob Open 2022; 10:e4234. [PMID: 35415062 PMCID: PMC8994073 DOI: 10.1097/gox.0000000000004234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 02/07/2022] [Indexed: 11/26/2022]
Abstract
Large cranial vault defects are challenging to manage due to the need to balance infection control, skin coverage, and restoration of the protective mechanical rigidity of the skull while also ensuring good head and neck aesthetic results. Conventional-staged treatment requires a long time period that includes debridement and scalp skin defect coverage with flaps as a first step, followed by definitive plate reconstruction 3–9 months later after infection control and flap atrophy resolution. We report a case of successful early cranioplasty in a factory worker who developed a large full-thickness cranial skull defect following artificial dura infection. Reconstruction was performed in two stages using an anterolateral thigh (ALT) flap. In the first stage, the scalp defect was covered with an ALT flap to close the skin following debridement. In the second stage performed 6 weeks later, the ALT flap was split into adiposal and adipocutaneous flaps to sandwich a computer-aided design custom-made titanium plate with an opening for the perforator to complete the cranioplasty. The patient successfully returned to work without recurrence of infection with 1-year follow-up. We report this case to demonstrate the utility of adipocutaneous flap plate sandwiching techniques in providing well-vascularized cover for early definitive cranial reconstruction and accelerated patient recovery.
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Msallem B, Maintz M, Halbeisen FS, Meyer S, Sigron GR, Sharma N, Cao S, Thieringer FM. Biomechanical Evaluation of Patient-Specific Polymethylmethacrylate Cranial Implants for Virtual Surgical Planning: An In-Vitro Study. MATERIALS 2022; 15:ma15051970. [PMID: 35269201 PMCID: PMC8911603 DOI: 10.3390/ma15051970] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 02/19/2022] [Accepted: 03/01/2022] [Indexed: 02/06/2023]
Abstract
Cranioplasty with freehand-molded polymethylmethacrylate implants is based on decades of experience and is still frequently used in clinical practice. However, data confirming the fracture toughness and standard biomechanical tests are rare. This study aimed to determine the amount of force that could be applied to virtually planned, template-molded, patient-specific implants (n = 10) with an implant thickness of 3 mm, used in the treatment of a temporoparietal skull defect (91.87 cm2), until the implant cracks and finally breaks. Furthermore, the influence of the weight and porosity of the implant on its force resistance was investigated. The primary outcome showed that a high force was required to break the implant (mean and standard deviation 1484.6 ± 167.7 N), and this was very strongly correlated with implant weight (Pearson’s correlation coefficient 0.97; p < 0.001). Secondary outcomes were force application at the implant’s first, second, and third crack. Only a moderate correlation could be found between fracture force and the volume of porosities (Pearson’s correlation coefficient 0.59; p = 0.073). The present study demonstrates that an implant thickness of 3 mm for a temporoparietal skull defect can withstand sufficient force to protect the brain. Greater implant weight and, thus, higher material content increases thickness, resulting in more resistance. Porosities that occur during the described workflow do not seem to reduce resistance. Therefore, precise knowledge of the fracture force of polymethylmethacrylate cranial implants provides insight into brain injury prevention and serves as a reference for the virtual design process.
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Affiliation(s)
- Bilal Msallem
- Clinic of Oral and Cranio-Maxillofacial Surgery, University Hospital Basel, CH-4031 Basel, Switzerland; (B.M.); (N.S.); (S.C.); (F.M.T.)
- Medical Additive Manufacturing Research Group (Swiss MAM), Department of Biomedical Engineering, University of Basel, CH-4123 Allschwil, Switzerland;
| | - Michaela Maintz
- Medical Additive Manufacturing Research Group (Swiss MAM), Department of Biomedical Engineering, University of Basel, CH-4123 Allschwil, Switzerland;
| | - Florian S. Halbeisen
- Basel Institute for Clinical Epidemiology and Biostatistics, Department of Clinical Research, University Hospital Basel, University of Basel, CH-4031 Basel, Switzerland;
| | - Simon Meyer
- Clinic of Oral and Cranio-Maxillofacial Surgery, University Hospital Basel, CH-4031 Basel, Switzerland; (B.M.); (N.S.); (S.C.); (F.M.T.)
- Medical Additive Manufacturing Research Group (Swiss MAM), Department of Biomedical Engineering, University of Basel, CH-4123 Allschwil, Switzerland;
- Correspondence:
| | - Guido R. Sigron
- Clinic of Oral and Cranio-Maxillofacial Surgery, Cantonal Hospital Aarau, CH-5001 Aarau, Switzerland;
| | - Neha Sharma
- Clinic of Oral and Cranio-Maxillofacial Surgery, University Hospital Basel, CH-4031 Basel, Switzerland; (B.M.); (N.S.); (S.C.); (F.M.T.)
- Medical Additive Manufacturing Research Group (Swiss MAM), Department of Biomedical Engineering, University of Basel, CH-4123 Allschwil, Switzerland;
| | - Shuaishuai Cao
- Clinic of Oral and Cranio-Maxillofacial Surgery, University Hospital Basel, CH-4031 Basel, Switzerland; (B.M.); (N.S.); (S.C.); (F.M.T.)
- Medical Additive Manufacturing Research Group (Swiss MAM), Department of Biomedical Engineering, University of Basel, CH-4123 Allschwil, Switzerland;
| | - Florian M. Thieringer
- Clinic of Oral and Cranio-Maxillofacial Surgery, University Hospital Basel, CH-4031 Basel, Switzerland; (B.M.); (N.S.); (S.C.); (F.M.T.)
- Medical Additive Manufacturing Research Group (Swiss MAM), Department of Biomedical Engineering, University of Basel, CH-4123 Allschwil, Switzerland;
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Pöppe JP, Spendel M, Schwartz C, Winkler PA, Wittig J. The "springform" technique in cranioplasty: custom made 3D-printed templates for intraoperative modelling of polymethylmethacrylate cranial implants. Acta Neurochir (Wien) 2022; 164:679-688. [PMID: 34873659 PMCID: PMC8913485 DOI: 10.1007/s00701-021-05077-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 11/23/2021] [Indexed: 12/19/2022]
Abstract
Background Manual moulding of cranioplasty implants after craniectomy is feasible, but does not always yield satisfying cosmetic results. In contrast, 3D printing can provide precise templates for intraoperative moulding of polymethylmethacrylate (PMMA) implants in cranioplasty. Here, we present a novel and easily implementable 3D printing workflow to produce patient-specific, sterilisable templates for PMMA implant moulding in cranioplastic neurosurgery. Methods 3D printable templates of patients with large skull defects before and after craniectomy were designed virtually from cranial CT scans. Both templates — a mould to reconstruct the outer skull shape and a ring representing the craniectomy defect margins — were printed on a desktop 3D printer with biocompatible photopolymer resins and sterilised after curing. Implant moulding and implantation were then performed intraoperatively using the templates. Clinical and radiological data were retrospectively analysed. Results Sixteen PMMA implants were performed on 14 consecutive patients within a time span of 10 months. The median defect size was 83.4 cm2 (range 57.8–120.1 cm2). Median age was 51 (range 21–80) years, and median operating time was 82.5 (range 52–152) min. No intraoperative complications occurred; PMMA moulding was uneventful and all implants fitted well into craniectomy defects. Excellent skull reconstruction could be confirmed in all postoperative computed tomography (CT) scans. In three (21.4%) patients with distinct risk factors for postoperative haematoma, revision surgery for epidural haematoma had to be performed. No surgery-related mortality or new and permanent neurologic deficits were recorded. Conclusion Our novel 3D printing-aided moulding workflow for elective cranioplasty with patient-specific PMMA implants proved to be an easily implementable alternative to solely manual implant moulding. The “springform” principle, focusing on reconstruction of the precraniectomy skull shape and perfect closure of the craniectomy defect, was feasible and showed excellent cosmetic results. The proposed method combines the precision and cosmetic advantages of computer-aided design (CAD) implants with the cost-effectiveness of manually moulded PMMA implants. Supplementary Information The online version contains supplementary material available at 10.1007/s00701-021-05077-7.
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Affiliation(s)
- Johannes P Pöppe
- Department of Neurosurgery, University Hospital Salzburg, Paracelsus Medical University, Ignaz-Harrer-Str. 79, 5020, Salzburg, Austria.
| | - Mathias Spendel
- Department of Neurosurgery, University Hospital Salzburg, Paracelsus Medical University, Ignaz-Harrer-Str. 79, 5020, Salzburg, Austria
| | - Christoph Schwartz
- Department of Neurosurgery, University Hospital Salzburg, Paracelsus Medical University, Ignaz-Harrer-Str. 79, 5020, Salzburg, Austria
| | - Peter A Winkler
- Department of Neurosurgery, University Hospital Salzburg, Paracelsus Medical University, Ignaz-Harrer-Str. 79, 5020, Salzburg, Austria
| | - Jörn Wittig
- Department of Oral and Maxillofacial Surgery, University Hospital Salzburg, Paracelsus Medical University, Müllner Hauptstraße 48, 5020, Salzburg, Austria
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12
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Baldia M, Joseph M, Sharma S, Kumar D, Retnam A, Koshy S, Karuppusami R. Customized cost-effective polymethylmethacrylate cranioplasty: a cosmetic comparison with other low-cost methods of cranioplasty. Acta Neurochir (Wien) 2022; 164:655-667. [PMID: 35107617 DOI: 10.1007/s00701-022-05121-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 01/10/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND Intraoperative hand-moulded cranioplasty and polymethylmethacrylate (PMMA) prostheses made from bone impressions are economical but the cosmetic results are less than satisfactory. Commercially available customized prostheses perform better but are prohibitively expensive. We evaluate the performance of a locally developed, low-cost customized PMMA cranioplasty prosthesis. OBJECTIVE To compare the cosmetic outcome of 3 types of PMMA cranioplasty as well as with objective measurements on postoperative CT scans METHODS: This study includes 70 patients who underwent cranioplasty between March 2016 and June 2020. In this period, patients had their cranioplasty prostheses made by intra-operative hand moulding (HM), by using the removed bone as a template and making a bone impression (BI) or by 3D printing the prosthesis based on a CT scan. Cosmetic outcomes were assessed by the patient and the operating surgeon on an 8-point scale. The degree of measured anthropometric asymmetry was measured on a postoperative CT scan and correlated with the cosmetic outcome. RESULTS Our locally produced 3D-printed cranioplasty prostheses showed a statistically better performance in cosmetic scores when compared to the HM and BI (p value < 0.001). CT anthropometric measurements significantly correlated with cosmetic outcome (p value 0.01) CONCLUSION: Our 3D cranioplasty prostheses had better cosmetic outcomes than HM and BI prostheses, and our technique is able to produce them at 10% of the cost of the currently available commercial customized prostheses.
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Affiliation(s)
- Manish Baldia
- Department of Neurosurgery, Jaslok Hospital and Research Centre, Mumbai, 400026, Maharashtra, India.
| | - Mathew Joseph
- Department of Neurological Sciences, Christian Medical College, Vellore, 632004, Tamil Nadu, India
| | - Suryaprakash Sharma
- Department of Dental Sciences, Christian Medical College, Vellore, 632004, Tamil Nadu, India
| | - Deva Kumar
- Department of Nuclear Medicine, Christian Medical College, Vellore, 632004, Tamil Nadu, India
| | - Ashwin Retnam
- Department of Neurological Sciences, Christian Medical College, Vellore, 632004, Tamil Nadu, India
| | - Santosh Koshy
- Department of Dental Sciences, Christian Medical College, Vellore, 632004, Tamil Nadu, India
| | - Reka Karuppusami
- Department of Biostatistics, Christian Medical College, Vellore, 632004, Tamil Nadu, India
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13
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Cosmetic results of autologous bone cranioplasty after decompressive craniectomy for traumatic brain injury based on a patient questionnaire. INTERDISCIPLINARY NEUROSURGERY 2021. [DOI: 10.1016/j.inat.2021.101311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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14
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Giese H, Antritter J, Unterberg A, Beynon C. Long-Term Results of Neurological Outcome, Quality of Life, and Cosmetic Outcome After Cranioplastic Surgery: A Single Center Study of 202 Patients. Front Neurol 2021; 12:702339. [PMID: 34354667 PMCID: PMC8329417 DOI: 10.3389/fneur.2021.702339] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 06/18/2021] [Indexed: 01/03/2023] Open
Abstract
Objective: An increased interest in the surgical procedures of decompressive craniectomy (DC) and subsequent cranioplasty (CP) has emerged during the last decades with specific focus on mortality and complication rates. The aim of the present study was to evaluate long-term neurological and cosmetic outcomes as well as Quality of Life (QoL) after CP surgery. Methods: We retrospectively reviewed the medical records of CP patients treated at our institution between 2004 and 2014 and performed a follow-up examination, with evaluation of neurological outcome using the modified Rankin Scale (mRS) and the Glasgow outcome scale (GOS), QoL (SF-36 and EQ-5D-3L). Furthermore, the cosmetic results after CP were analyzed. Results: A total of 202 CP-patients were included in the present study. The main indications for DC and subsequent CP were space-occupying cerebral ischemia (32%), traumatic brain injury (TBI, 26%), intracerebral or subarachnoid hemorrhage (32%) and infection (10%). During a mean follow-up period of 91.9 months 46/42.6% of patients had a favorable neurological outcome (mRS ≤ 3/GOS ≥ 4). Patients with ischemia had a significant worse outcome (mRS 4.3 ± 1.5) compared with patients after TBI (3.1 ± 2.3) and infectious diseases requiring CP (2.4 ± 2.3). The QoL analysis showed that <1/3rd of patients (31.2%) had a good QoL (SF-36) with a mean EQ-5D-VAS of 59 ± 26. Statistical analysis confirmed a significant worse QoL of ischemia patients compared to other groups whereas multivariate regression analysis showed no other factors which may had an impact on the QoL. The majority (86.5%) of patients were satisfied with the cosmetic result after CP and regression analysis showed no significant factors associated with unfavorable outcomes. Conclusion: Long-term outcome and QoL after CP were significantly influenced by the medical condition requiring DC. Early detection and evaluation of QoL after CP may improve the patient's outcome due to an immediate initiation of targeted therapies (e.g., occupational- or physiotherapy).
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Affiliation(s)
- Henrik Giese
- Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Jennifer Antritter
- Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Andreas Unterberg
- Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Christopher Beynon
- Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Germany
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15
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Schön SN, Skalicky N, Sharma N, Zumofen DW, Thieringer FM. 3D-Printer-Assisted Patient-Specific Polymethyl Methacrylate Cranioplasty: A Case Series of 16 Consecutive Patients. World Neurosurg 2021; 148:e356-e362. [PMID: 33418118 DOI: 10.1016/j.wneu.2020.12.138] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/27/2020] [Accepted: 12/27/2020] [Indexed: 12/16/2022]
Abstract
BACKGROUND To develop a novel 3D-printer-assisted method to fabricate patient-specific implants for cranioplasty and to demonstrate its feasibility and its use in 16 consecutive cases. METHODS We report on 16 consecutive patients who have undergone cranioplasty surgery for an extensive skull defect after decompressive surgery and in which the bone flap was not available. We present the workflow for the implant production using a 3D-printer-assisted molding technique. Preoperative, intraoperative, and postoperative data were analyzed/evaluated. RESULTS Eleven out of our 16 patients (68.7%) presented with extensive hemispheric bone defects. Indication for initial craniotomy were traumatic brain injury (4; 25%), acute subdural hematoma (4; 25%), ischemic stroke (3; 18.8%), tumor (3; 18.8%), and ruptured aneurysm (2; 12.5%). Median (range) operation time was 121 (89-206) minutes. Median (range) intraoperative blood loss was 300 (100-3300) mL. The mean (range) follow-up period is 6 (0-21) months. Complications occurred in 7 out of our 16 patients (43.8%), in 6 (37.5%) of which a reoperation was required to evacuate an extra-axial hematoma (3; 50%), for shunting of an epidural fluid collection (1; 16.7%), or for skin flap necrosis (1; 16.7%). One patient (16.7%) developed a chronic asymptomatic subdural fluid collection that was stable over the follow-up period. CONCLUSIONS Our workflow to intraoperatively produce patient-specific implants in a timely manner to cover cranial defects proved to be feasible. The results are cosmetically appealing, and postoperative CT scans show well-fitting implants. As implantable printable substrates are already available, we aim to advance and certify 3D-printed patient-specific implants in the near future.
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Affiliation(s)
- Stephan N Schön
- Department of Neurosurgery and Spine Surgery, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Nicolas Skalicky
- Department of Diagnostic and Interventional Neuroradiology, Inselspital, University Hospital Bern, University of Bern, Bern, Switzerland
| | - Neha Sharma
- Department of Cranio-Maxillo-Facial Surgery and 3D Print Lab, University Hospital Basel, University of Basel, Basel, Switzerland; Medical Additive Manufacturing Research Group, Department of Biomedical Engineering, University of Basel, Basel, Switzerland
| | - Daniel W Zumofen
- Department of Surgery, Department of Neurology and Department of Radiology, Maimonides Medical Center, SUNY Downstate University, Brooklyn, New York, USA
| | - Florian M Thieringer
- Department of Cranio-Maxillo-Facial Surgery and 3D Print Lab, University Hospital Basel, University of Basel, Basel, Switzerland; Medical Additive Manufacturing Research Group, Department of Biomedical Engineering, University of Basel, Basel, Switzerland
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16
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Hadley C, North R, Srinivasan V, Kan P, Burkhardt JK. Elective Sonolucent Cranioplasty for Real-Time Ultrasound Monitoring of Flow and Patency of an Extra- to Intracranial Bypass. J Craniofac Surg 2020; 31:622-624. [PMID: 32149973 PMCID: PMC7329201 DOI: 10.1097/scs.0000000000006225] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Cross-sectional imaging studies or catheter angiogram are the imaging modalities of choice to evaluate bypass patency after extra- to intracranial (EC-IC) bypass surgery. Although providing accurate results, these imaging modalities are time-consuming and/or present radiation risk for the patient. Ultrasound imaging is a fast and widely available imaging modality, but is limited in this setting due to the non-sonolucent autologous bone flap covering the bypass after surgery. The recently FDA approved clear polymethyl methacrylate (PMMA) cranioplasty implant overcomes this limitation by its sonolucent characteristic, but has not yet been used in the setting of EC-IC bypass surgery. Here, the authors describe for the first time the feasibility of an elective sonolucent cranioplasty to monitor flow and patency of an EC-IC bypass in real time using ultrasound. This moyamoya patient underwent a direct superficial temporal artery to middle cerebral artery (STA-MCA) bypass, after which a PMMA implant was used to close the craniotomy defect, instead of reimplanting the autologous bone flap. Immediate postoperative bedside transcranioplasty ultrasound confirmed bypass patency and allowed for quantitative flow measurements as well as for exclusion of postoperative hemorrhage. Postoperative CTA and catheter angiogram confirmed patency of the bypass without complications. This report shows for the first time that this technique is feasible and permits bedside transcranioplasty ultrasound assessment of bypass flow in real time, confirmed with angiography. This technique may permit easy comparison of baseline findings with follow up assessments and facilitate less invasive monitoring of bypass patency.
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Affiliation(s)
- Caroline Hadley
- Department of Neurosurgery, Baylor College of Medicine, Houston, TX
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17
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Flores AR, Srinivasan VM, Seeley J, Huggins C, Kan P, Burkhardt JK. Safety, Feasibility, and Patient-Rated Outcome of Sonolucent Cranioplasty in Extracranial-Intracranial Bypass Surgery to Allow for Transcranioplasty Ultrasound Assessment. World Neurosurg 2020; 144:e277-e284. [PMID: 32827747 PMCID: PMC7438362 DOI: 10.1016/j.wneu.2020.08.114] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 08/15/2020] [Accepted: 08/16/2020] [Indexed: 12/02/2022]
Abstract
Objective We sought to analyze the safety and feasibility of elective sonolucent cranioplasty in the setting of extracranial-to-intracranial (EC-IC) bypass surgery to monitor bypass patency using ultrasound. Methods Patients who underwent direct EC-IC bypass surgery agreed to sonolucent cranioplasty at the time of surgery and received a sonolucent polymethyl methacrylate (PMMA) implant. Besides monitoring clinical outcome, all patients received transcranioplasty ultrasound (TCUS) on postoperative day 1 and at last follow-up. In addition, bypass patency was confirmed using catheter angiogram and fit of implant using computed tomography. Patient-rated outcome was assessed through phone questionnaire. Results EC-IC bypass surgery with PMMA cranioplasty was successful in all 7 patients with patent bypasses on postoperative angiogram. Direct TCUS was feasible in all patients, and bypass patency was monitored. There were no complications such as postoperative hemorrhagic/ischemic complications related to the bypass procedure in this patient population, as well as no complications related to the PMMA implant. Postoperative computed tomography showed favorable cosmetic results of the PMMA implant in both the pterional area for superficial temporal artery−middle cerebral artery bypasses and parietooccipital area for occipital artery−middle cerebral artery bypasses as confirmed by high-rated overall patient satisfaction with favorable cosmetic, pain, and sensory patient-rated outcomes. Conclusions In this study we were able to show that this novel technique is safe, allows for patency assessment of the EC-IC bypass using bedside TCUS technique, and is cosmetically satisfying for patients.
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Affiliation(s)
- Alex R Flores
- Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA.
| | | | - Jill Seeley
- Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA
| | - Charity Huggins
- Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA
| | - Peter Kan
- Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA
| | - Jan-Karl Burkhardt
- Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA
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18
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Giese H, Meyer J, Engel M, Unterberg A, Beynon C. Polymethylmethacrylate patient-matched implants (PMMA-PMI) for complex and revision cranioplasty: analysis of long-term complication rates and patient outcomes. Brain Inj 2019; 34:269-275. [PMID: 31657239 DOI: 10.1080/02699052.2019.1683895] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Objective: Cranioplasty (CP) is associated with high complication rates and patient-matched implants (PMI) are frequently used for CP. However, only limited data are available regarding complication rates of PMI-based CP after complex or failed primary CP. Here we report our experience with the use of polymethylmethacrylate (PMMA) PMI for this purpose.Method: We analyzed all patients with complex or failed primary CP and subsequent implantation of PMMA-PMI between 2010 and 2015 at our institution.Results: A total of 67 patients (29 females, 38 males) with a mean age of 43 years (range: 13-74 years) were included in the study. Primary PMI-CP was performed in 18 patients with destructive or osteolytic bone tumors. Secondary PMI-CP was performed in 49 patients. Complications occurred in 14 patients with an overall complication rate of 21.7% during a mean follow-up of 39.7 ± 23.4 month. Approximately two-thirds of the patients reported a good quality of life after the initial event and subsequent CP. The majority of patients (>90%) was satisfied with the cosmetic result.Conclusion: Surgical CP with PMMA-PMI appears to be a suitable method for patients with failed or complex CP. Complication rates are comparable to those reported for primary CP.
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Affiliation(s)
- Henrik Giese
- Department of Neurosurgery, University of Heidelberg, Heidelberg, Germany
| | - Jennifer Meyer
- Department of Neurosurgery, University of Heidelberg, Heidelberg, Germany
| | - Michael Engel
- Department of Oral and Maxillofacial Diseases, University of Heidelberg, Heidelberg, Germany
| | - Andreas Unterberg
- Department of Neurosurgery, University of Heidelberg, Heidelberg, Germany
| | - Christopher Beynon
- Department of Neurosurgery, University of Heidelberg, Heidelberg, Germany
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19
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Cosmetic Outcome of Cranioplasty After Decompressive Craniectomy-An Overlooked Aspect. World Neurosurg 2019; 129:e81-e86. [PMID: 31096024 DOI: 10.1016/j.wneu.2019.05.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 05/02/2019] [Accepted: 05/03/2019] [Indexed: 11/24/2022]
Abstract
BACKGROUND Cranioplasty (CP) is an obligatory surgery after decompressive craniectomy (DC). The primary objective is to protect the brain from external injury and prevent syndrome of trephined. In a government hospital, such cases pose a significant burden to a trauma center. Because of this reason, cosmetic outcome is never taken into account for the CP. We present results of CP performed at our hospital. METHODS This is a retrospective review of the cases of CP performed over the past 3 years at our hospital. The cosmetic outcome was divided into 3 grades: 1-good symmetrical, 2-irregularities, 2a-elevated and 2b depressed, and 3-bad cosmetic outcome requiring reoperation. RESULTS A total of 133 patients with acute brain injury underwent CP during the study period. The outcome was good in 74 (55.6%) and bad, requiring reoperation, in 2 (1.5%) cases. Various types of the CP materials like autologous bone flap, titanium mesh, and customized titanium plates were used. Methods of fixation were threads or miniplates and screws. In univariate analysis, cerebral venous thrombosis as an indication for DC, use of autologous bone flap, and fixation with thread were associated with poor outcome. However, in multivariate analysis only the method of implant fixation was associated with poor outcome. It was found that if screws and plates are used for fixation of bone flap, the chances of bad outcome are reduced by 74.6%. CONCLUSIONS The cosmetic outcome is overlooked for CP. The bone flap fixation has to be rigid for a good outcome.
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20
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Morales-Gómez JA, Garcia-Estrada E, Leos-Bortoni JE, Delgado-Brito M, Flores-Huerta LE, De La Cruz-Arriaga AA, Torres-Díaz LJ, de León ÁRMP. Cranioplasty with a low-cost customized polymethylmethacrylate implant using a desktop 3D printer. J Neurosurg 2018; 130:1721-1727. [PMID: 29905512 DOI: 10.3171/2017.12.jns172574] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 12/11/2017] [Indexed: 01/14/2023]
Abstract
OBJECTIVE Cranioplasty implants should be widely available, low in cost, and customized or easy to mold during surgery. Although autologous bone remains the first choice for repair, it cannot always be used due to infection, fragmentation, bone resorption, or other causes, which led to use of synthetic alternatives. The most frequently used allogenic material for cranial reconstructions with long-term results is polymethylmethacrylate (PMMA). Three-dimensional printing technology has allowed the production of increasingly popular customized, prefabricated implants. The authors describe their method and experience with a customized PMMA prosthesis using a precise and reliable low-cost implant that can be customized at any institution with open-source or low-cost software and desktop 3D printers. METHODS A review of 22 consecutive patients undergoing CT-based, low-cost, customized PMMA cranioplasty over a 1-year period at a university teaching hospital was performed. Preoperative data included patient sex and age; CT modeling parameters, including the surface area of the implant (defect); reason for craniectomy; date(s) of injury and/or resections; the complexity of the defect; and associated comorbidities. Postoperative data included morbiditiy and complications, such as implant exposure, infection, hematoma, seroma, implant failure, and seizures; the cost of the implant; and cosmetic outcome. RESULTS Indications for the primary craniectomy were traumatic brain injury (16, 73%), tumor resection (3, 14%), infection (1, 4%), and vascular (2, 9%). The median interval between previous surgery and PMMA cranioplasty was 12 months. The operation time ranged from 90 to 150 minutes (mean 126 minutes). The average cranial defect measured 65.16 cm2 (range 29.31-131.06 cm2). During the recovery period, there was no sign of infection, implant rejection, or wound dehiscence, and none of the implants had to be removed over a follow-up ranging from 1 to 6 months. The aesthetic appearance of all patients was significantly improved, and the implant fit was excellent. CONCLUSIONS The use of a customized PMMA was associated with excellent patient, family, and surgeon satisfaction at follow-up at a fraction of the cost associated with commercially available implants. This technique could be an attractive option to all patients undergoing cranioplasty.
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21
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Moser M, Schmid R, Schindel R, Hildebrandt G. Patient-specific polymethylmethacrylate prostheses for secondary reconstruction of large calvarial defects: A retrospective feasibility study of a new intraoperative moulding device for cranioplasty. J Craniomaxillofac Surg 2016; 45:295-303. [PMID: 28011181 DOI: 10.1016/j.jcms.2016.11.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 11/21/2016] [Accepted: 11/22/2016] [Indexed: 11/29/2022] Open
Abstract
PURPOSE The aim of this study was to review a new template-based technique for intraoperative patient-specific cranioplasty manufacturing (PSCM) with polymethylmethacrylate (PMMA) to cover large calvarial defects. MATERIAL AND METHODS A polypropylene foil thermoformed on a three-dimensional reprint of the calvarial defect was used as an intraoperative moulding device for PMMA between August 2012 and December 2015. Surgical and radiological data were retrospectively reviewed, and a patient questionnaire was used to assess functional and cosmetic outcome (numeric rating scale, Odom's criteria). RESULTS Seventeen patients (mean age 42.2 ± 14.5 years) received PSCM. Operating time averaged 130 ± 34 min, and the approximate blood loss was 293 ± 185 ml. Volumetric analysis revealed a lower implant volume compared to index bone (mean 66.5 vs. 72 cm3, p = 0.513), the mean difference in thickness being the lowest in the posterior parietal and pterional (0.4-0.7 mm) and the highest in the anterior-superior frontal area (1.8 mm). Cosmetic satisfaction averaged 9 ± 1.5, with 70.6% of patients judging the overall result as excellent or good and 29.4% as satisfactory. Mean follow-up was 19.5 ± 13.3 months, with an overall complication rate of 17.6%, including 11.8% surgical site infections (SSIs) and one implant removal. CONCLUSIONS Intraoperative PSCM using PMMA moulded on a thermoformed polypropylene foil leads to satisfactory outcomes. It is a safe technique with complication rates comparable but not superior to those of other alloplastic techniques, but the device has considerable production costs.
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Affiliation(s)
- Manuel Moser
- Department of Neurosurgery (Head: A. Weyerbrock), Cantonal Hospital St. Gallen, Rorschacher Strasse 95, 9007 St. Gallen, Switzerland.
| | - Raphael Schmid
- Department of Neurosurgery (Head: A. Weyerbrock), Cantonal Hospital St. Gallen, Rorschacher Strasse 95, 9007 St. Gallen, Switzerland
| | - Ralf Schindel
- Department of Neurosurgery (Head: A. Weyerbrock), Cantonal Hospital St. Gallen, Rorschacher Strasse 95, 9007 St. Gallen, Switzerland
| | - Gerhard Hildebrandt
- Department of Neurosurgery (Head: A. Weyerbrock), Cantonal Hospital St. Gallen, Rorschacher Strasse 95, 9007 St. Gallen, Switzerland
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22
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Fiaschi P, Pavanello M, Imperato A, Dallolio V, Accogli A, Capra V, Consales A, Cama A, Piatelli G. Surgical results of cranioplasty with a polymethylmethacrylate customized cranial implant in pediatric patients: a single-center experience. J Neurosurg Pediatr 2016; 17:705-10. [PMID: 26824593 DOI: 10.3171/2015.10.peds15489] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Cranioplasty is a reconstructive procedure used to restore skull anatomy and repair skull defects. Optimal skull reconstruction is a challenge for neurosurgeons, and the strategy used to achieve the best result remains a topic of debate, especially in pediatric patients for whom the continuing skull growth makes the choice of material more difficult. When the native bone flap, which is universally accepted as the preferred option in pediatric patients, is unavailable, the authors' choice of prosthetic material is a polymethylmethacrylate (PMMA) implant designed using a custom-made technique. In this paper the authors present the results of their clinical series of 12 custom-made PMMA implants in pediatric patients. METHODS A retrospective study of the patients who had undergone cranioplasty at Gaslini Children's Hospital between 2006 and 2013 was conducted. A total of 12 consecutive cranioplasties in 12 patients was reviewed, in which a patient-specific PMMA implant was manufactured using a virtual 3D model and then transformed into a physical model using selective laser sintering or 3D printing. All patients or parents were administered a questionnaire to assess how the patient/parent judged the aesthetic result. RESULTS Patient age at craniectomy ranged from 5 months to 12.5 years, with a mean age of 84.33 months at cranioplasty. The mean extension of the custom-made plastic was 56.83 cm(2). The mean time between craniectomy and cranioplasty was 9.25 months. The mean follow-up duration was 55.7 months. No major complications were recorded; 3 patients experienced minor/moderate complications (prosthesis dislocation, granuloma formation, and fluid collection). CONCLUSIONS In this patient series, PMMA resulted in an extremely low complication rate and the custom-made technique was associated with an excellent grade of patient or parent satisfaction on long-term follow up.
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Affiliation(s)
- Pietro Fiaschi
- Department of Neurosurgery, San Martino - IST University Hospital (IRCCS), Genoa;,Department of Neuroscience, University of Turin, Italy
| | - Marco Pavanello
- Department of Pediatric Neurosurgery, Istituto Giannina Gaslini, Genoa
| | - Alessia Imperato
- Department of Pediatric Neurosurgery, Istituto Giannina Gaslini, Genoa
| | | | - Andrea Accogli
- Department of Pediatric Neurosurgery, Istituto Giannina Gaslini, Genoa;,University of Genoa; and
| | - Valeria Capra
- Department of Pediatric Neurosurgery, Istituto Giannina Gaslini, Genoa
| | | | - Armando Cama
- Department of Pediatric Neurosurgery, Istituto Giannina Gaslini, Genoa
| | - Gianluca Piatelli
- Department of Pediatric Neurosurgery, Istituto Giannina Gaslini, Genoa
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