1
|
Rendenbach C, Schoellchen M, Bueschel J, Gauer T, Sedlacik J, Kutzner D, Vallittu PK, Heiland M, Smeets R, Fiehler J, Siemonsen S. Evaluation and reduction of magnetic resonance imaging artefacts induced by distinct plates for osseous fixation: an in vitro study @ 3 T. Dentomaxillofac Radiol 2018; 47:20170361. [PMID: 29718688 DOI: 10.1259/dmfr.20170361] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
OBJECTIVES: To analyze MRI artefacts induced at 3 T by bioresorbable, titanium (TI) and glass fibre reinforced composite (GFRC) plates for osseous reconstruction. METHODS: Fixation plates including bioresorbable polymers (Inion CPS, Inion Oy, Tampere, Finland; Rapidsorb, DePuy Synthes, Umkirch, Germany; Resorb X, Gebrueder KLS Martin GmbH, Tuttlingen, Germany), GFRC (Skulle Implants Oy, Turku, Finland) and TI plates of varying thickness and design (DePuy Synthes, Umkirch, Germany) were embedded in agarose gel and a 3 T MRI was performed using a standard protocol for head and neck imaging including T1W and T2W sequences. Additionally, different artefact reduction techniques (slice encoding for metal artefact reduction & ultrashort echo time) were used and their impact on the extent of artefacts evaluated for each material. RESULTS: All TI plates induced significantly more artefacts than resorbable plates in T1W and T2W sequences. GFRCs induced the least artefacts in both sequences. The total extent of artefacts increased with plate thickness and height. Plate thickness had no influence on the percentage of overestimation in all three dimensions. TI-induced artefacts were significantly reduced by both artefact reduction techniques. CONCLUSIONS: Polylactide, GFRC and magnesium plates produce less susceptibility artefacts in MRI compared to TI, while the dimensions of TI plates directly influence artefact extension. Slice encoding for metal artefact reduction and ultrashort echo time significantly reduce metal artefacts at the expense of scan time or image resolution.
Collapse
Affiliation(s)
- Carsten Rendenbach
- 1 Department of Oral and Maxillofacial Surgery, Charité - Universitaetsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health , Berlin , Germany.,2 Berlin Institute of Health (BIH) , Berlin , Germany
| | - Max Schoellchen
- 3 Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf , Hamburg , Germany
| | - Julie Bueschel
- 3 Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf , Hamburg , Germany
| | - Tobias Gauer
- 4 Department of Radiotherapy and Radiation Oncology, University Medical Center Hamburg-Eppendorf , Hamburg , Germany
| | - Jan Sedlacik
- 5 Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf , Hamburg , Germany
| | - Daniel Kutzner
- 5 Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf , Hamburg , Germany
| | - Pekka K Vallittu
- 6 Department of Biomaterials Science, Institute of Dentistry, University of Turku, and City of Turku, Welfare Division , Turku , Finland
| | - Max Heiland
- 1 Department of Oral and Maxillofacial Surgery, Charité - Universitaetsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health , Berlin , Germany
| | - Ralf Smeets
- 3 Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf , Hamburg , Germany
| | - Jens Fiehler
- 5 Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf , Hamburg , Germany
| | - Susanne Siemonsen
- 5 Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf , Hamburg , Germany
| |
Collapse
|
2
|
Singh M, Singh RK, Passi D, Aggarwal M, Kaur G. Management of pediatric mandibular fractures using bioresorbable plating system - Efficacy, stability, and clinical outcomes: Our experiences and literature review. J Oral Biol Craniofac Res 2015; 6:101-6. [PMID: 27195206 DOI: 10.1016/j.jobcr.2015.09.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 09/21/2015] [Indexed: 11/24/2022] Open
Abstract
AIMS The purpose of this study was to determine the efficacy and stability of the biodegradable fixation system for treatment of mandible fractures in pediatric patients by measuring the bite force. METHODS Sixty pediatric patients with mandibular fractures (36 males, 24 females) were included in this study. The 2.5-mm resorbable plates were adapted along Champy's line of ideal osteosynthesis and secured with four 2.5 mm diameter monocortical resorbable screws, 8 mm in length. All patients were followed for 10 months. Clinical parameters, such as soft tissue infection, nonunion, malunion, implant exposure, malocclusion, nerve injury, and bite force for stability, were prospectively assessed. RESULTS Adequate fixation and primary bone healing was achieved in 100% of the cases. Six minor complications (10%) were observed: 2 soft tissue infections (3%), 1 plate dehiscence (2%), 1 malocclusion (2%), and 2 paresthesia (3%). CONCLUSION 2.5-mm resorbable plating system along Champy's line of ideal osteosynthesis is a good treatment modality for mandible fractures in pediatric patients.
Collapse
Affiliation(s)
- Mahinder Singh
- Senior Resident, Department of Oral and Maxillofacial Surgery, Faculty of Dental Sciences, King George' Medical University, Lucknow, Uttar Pradesh, India
| | - R K Singh
- Professor, Department of Oral and Maxillofacial Surgery, Faculty of Dental Sciences, King George' Medical University, Lucknow, Uttar Pradesh, India
| | - Deepak Passi
- Tutor, Department of Oral and Maxillofacial Surgery, E.S.I.C. Dental College and Hospital, Rohini, Delhi, India
| | - Mohit Aggarwal
- Senior Lecturer, K.D. Dental College & Hospital, Mathura, Uttar Pradesh, India
| | - Guneet Kaur
- Observer, Department of Oral and Maxillofacial Surgery, Faculty of Dental Sciences, King George' Medical University, Lucknow, Uttar Pradesh, India
| |
Collapse
|
3
|
Ahmad K, Katballe N, Pilegaard H. Fixation of sternal fracture using absorbable plating system, three years follow-up. J Thorac Dis 2015; 7:E131-4. [PMID: 26101659 DOI: 10.3978/j.issn.2072-1439.2015.05.03] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Accepted: 04/01/2015] [Indexed: 11/14/2022]
Abstract
Sternal fractures occur due to severe chest wall trauma in a small number of patients. They are often conservatively treated. The surgical intervention, although controversial, is indicated in case of deformity, severe pain, and ventilatory complications. We report the first case where absorbable plate has been used to fix a traumatic fracture in a 42-year-old female. After 3 years, the patient is still free of symptoms and CT scanning reveals intact sternal bone structure.
Collapse
Affiliation(s)
- Khalil Ahmad
- Department of Cardiothoracic and Vascular Surgery & Institute of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Niels Katballe
- Department of Cardiothoracic and Vascular Surgery & Institute of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Hans Pilegaard
- Department of Cardiothoracic and Vascular Surgery & Institute of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark
| |
Collapse
|
4
|
Wu W, Zhou J, Xu CT, Zhang J, Jin YJ, Sun GL. Biomechanical evaluation of maxillary Lefort Ι fracture with bioabsorbable osteosynthesis internal fixation. Dent Traumatol 2014; 30:447-54. [PMID: 25146129 DOI: 10.1111/edt.12120] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2014] [Indexed: 10/24/2022]
Affiliation(s)
- Wei Wu
- Department of stomatology; Tianjin medical university general hospital; Tianjin China
| | - Jiang Zhou
- Department of stomatology; Tianjin medical university general hospital; Tianjin China
| | - Chong-Tao Xu
- Department of stomatology; Tianjin medical university general hospital; Tianjin China
| | - Jie Zhang
- Department of stomatology; Tianjin medical university general hospital; Tianjin China
| | - Yan-Jiao Jin
- Department of stomatology; Tianjin medical university general hospital; Tianjin China
| | - Geng-Lin Sun
- Department of stomatology; Tianjin medical university general hospital; Tianjin China
| |
Collapse
|
5
|
Repair of a floating sternum with autologous rib grafts and polylactide bioabsorbable struts in an 18-year-old male. J Pediatr Surg 2012; 47:e27-30. [PMID: 23217912 DOI: 10.1016/j.jpedsurg.2012.08.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Revised: 08/24/2012] [Accepted: 08/27/2012] [Indexed: 11/21/2022]
Abstract
Failed regeneration of costal cartilage after open repair of pectus chest wall deformities can result in a floating sternum. A floating sternum can be repaired by insertion of a rib graft between the rib and sternum, and stabilization with a metal strut. The metal implant is usually removed with a second operation. We report use of bioabsorbable struts to stabilize rib grafts during repair of a floating sternum in an 18-year-old male with a failed open repair of pectus carinatum. He had an uncomplicated peri-operative course. One year later, the sternum had a normal appearance and was sturdy. A second operation for removal of hardware was not necessary.
Collapse
|
6
|
Little JP, Horn TJ, Marcellin-Little DJ, Harrysson OLA, West HA. Development and validation of a canine radius replica for mechanical testing of orthopedic implants. Am J Vet Res 2011; 73:27-33. [PMID: 22204285 DOI: 10.2460/ajvr.73.1.27] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To design and fabricate fiberglass-reinforced composite (FRC) replicas of a canine radius and compare their mechanical properties with those of radii from dog cadavers. SAMPLE Replicas based on 3 FRC formulations with 33%, 50%, or 60% short-length discontinuous fiberglass by weight (7 replicas/group) and 5 radii from large (> 30-kg) dog cadavers. PROCEDURES Bones and FRC replicas underwent nondestructive mechanical testing including 4-point bending, axial loading, and torsion and destructive testing to failure during 4-point bending. Axial, internal and external torsional, and bending stiffnesses were calculated. Axial pullout loads for bone screws placed in the replicas and cadaveric radii were also assessed. RESULTS Axial, internal and external torsional, and 4-point bending stiffnesses of FRC replicas increased significantly with increasing fiberglass content. The 4-point bending stiffness of 33% and 50% FRC replicas and axial and internal torsional stiffnesses of 33% FRC replicas were equivalent to the cadaveric bone stiffnesses. Ultimate 4-point bending loads did not differ significantly between FRC replicas and bones. Ultimate screw pullout loads did not differ significantly between 33% or 50% FRC replicas and bones. Mechanical property variability (coefficient of variation) of cadaveric radii was approximately 2 to 19 times that of FRC replicas, depending on loading protocols. CONCLUSIONS AND CLINICAL RELEVANCE Within the range of properties tested, FRC replicas had mechanical properties equivalent to and mechanical property variability less than those of radii from dog cadavers. Results indicated that FRC replicas may be a useful alternative to cadaveric bones for biomechanical testing of canine bone constructs.
Collapse
Affiliation(s)
- Jeffrey P Little
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27606, USA
| | | | | | | | | |
Collapse
|
8
|
Effect of in vitro aging on the stiffness of bioabsorbable fixation plates. J Craniofac Surg 2010; 22:110-2. [PMID: 21187765 DOI: 10.1097/scs.0b013e3181f6f7dc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
The purpose of this study was to investigate the effect of in vitro aging on the stiffness of bioabsorbable fixation plates. Twenty-four polylactic/polyglycolic acid plates (LactoSorb; Lorenz, Jacksonville, FL) were divided in 3 groups of 8 specimens each. Group A served as control, and groups B and C were immersed in 0.1 M lactic acid for 15 and 30 days, respectively. All specimens were subjected to a 3-point bending test, using a universal testing machine, and the stiffness of each specimen was estimated. When analyzed with one-way analysis of variance, no difference was observed for the control and in vitro-aged specimens with regard to stiffness. Long-term (30 d) in vitro aging of poly-L-lactic acid bioabsorbable fixation plates does not seem to significantly affect the stiffness of the material as derived from a 3-point bending test.
Collapse
|