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Li Q, Wang L, Yang H, Yang X, Liu L, Wang L, Song Y. Surgical Treatment Outcomes of Anterior-Only Correction and Reconstruction for Severe Cervical Kyphotic Deformity with Neurofibromatosis-1: A Retrospective Study with a 5-Year Follow-Up. Orthop Surg 2024. [PMID: 38769783 DOI: 10.1111/os.14096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 04/21/2024] [Accepted: 04/26/2024] [Indexed: 05/22/2024] Open
Abstract
OBJECTIVES Currently, anterior-only (AO), posterior-only, and combined anterior-posterior spinal fusions are common strategies for treating cervical kyphosis in patients with neurofibromatosis-1 NF-1. Nevertheless, the choice of surgical strategy remains a topic of controversy. The aim of our study is to evaluate the safety and effectiveness of anterior decompression and spinal reconstruction for the treatment of cervical kyphosis in patients with NF-1. METHODS Twelve patients with NF-1-associated cervical kyphotic deformity were reviewed retrospectively between January 2010 and April 2020. All patients underwent AO correction and reconstruction. The X-ray was followed up in all these patients to assess the preoperative and postoperative local kyphosis angle (LKA), the global kyphosis angle (GKA), the sagittal vertical axis, and the T1 slope. The visual analog scale score, Japanese Orthopedic Association (JOA) score, and neck disability index (NDI) score were used to evaluate the improvement inclinical symptoms. The results of the difference in improvement from preoperatively to the final follow-up assessment were assessed using a paired t-test or Mann-Whitney U-test. RESULTS The LKA and GKA decreased from the preoperative average of 64.42 (range, 38-86) and 35.50 (range, 10-81) to an average of 16.83 (range, -2 to 46) and 4.25 (range, -22 to 39) postoperatively, respectively. The average correction rates of the LKA and GKA were 76.11% and 111.97%, respectively. All patients had achieved satisfactory relief of neurological symptoms (p < 0.01). JOA scores were improved from 10.42 (range, 8-16) preoperatively to 15.25 (range, 11-18) at final follow-up (p < 0.01). NDI scores were decreased from an average of 23.25 (range, 16-34) preoperatively to an average of 7.08 (range, 3-15) at the final follow-up (p < 0.01). CONCLUSION Anterior-only correction and reconstruction is a safe and effective method for correcting cervical kyphosis in NF-1 patients. In fixed cervical kyphosis cases, preoperative skull traction should also be considered.
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Affiliation(s)
- Qiujiang Li
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Liang Wang
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Huiliang Yang
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Xi Yang
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Limin Liu
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Lei Wang
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Yueming Song
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu, China
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van Doornik SP, Pijnenburg MBM, Janssen KI, Ren Y, Kuijpers-Jagtman AM. Evaluation of the use of a clinical practice guideline for external apical root resorption among orthodontists. Prog Orthod 2024; 25:15. [PMID: 38644413 PMCID: PMC11033249 DOI: 10.1186/s40510-024-00515-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 03/08/2024] [Indexed: 04/23/2024] Open
Abstract
BACKGROUND External apical root resorption (EARR) is a frequently observed adverse event in patients undergoing fixed appliance therapy. Assessing the patients' risk during treatment is important, as certain factors are assumed to be associated with an increased likelihood of occurrence. However, their predictive value remains limited, making evidence-based clinical decision-making challenging for orthodontists. To address this issue, the Dutch Association of Orthodontists (NvVO) developed a clinical practice guideline (CPG) for EARR in accordance with the AGREE II instrument (Appraisal of Guidelines for Research and Evaluation II) in 2018. The aim of this study is to get insight into the actual utilization and the practical implementation of the guideline among orthodontists. The hypothesis to be tested was that after its introduction, clinical practice for EARR has changed towards the recommendations in the CPG. OBJECTIVE To investigate the use of the 2018 clinical practice guidelines for EARR among orthodontists 3 years after its introduction. METHODS A questionnaire using a 7-point Likert scale was developed concerning four domains of EARR described in the guideline. The questionnaire was piloted, finalised, and then distributed digitally among Dutch orthodontists. REDCap was used for data collection, starting with an invitation email in June 2021, followed by two reminders. Effect was tested by the Mann-Whitney U test, and the influence of demographic variables was analysed. RESULTS Questionnaires were sent out to all 275 and completed by 133 (response rate 48%); N = 59 females and N = 73 males were included; 81% had their training in the Netherlands, 89% had ≥ 6 years of work experience, and 89% worked in private orthodontic practice. One hundred thirty orthodontists (98.5%) reported changes in clinical practice. The biggest positive change in clinical behaviour regarding EARR occurred if EARR was diagnosed during treatment. Sex, clinical experience, country of specialist training, and working environment of the respondents did not affect clinical practices regarding EARR. CONCLUSIONS This questionnaire demonstrated that, 3 years after introduction of the guideline, orthodontists improved their self-reported clinical practices to a more standardised management of root resorption. None of the demographic predictors had a significant effect on the results.
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Affiliation(s)
- Sebastiaan P van Doornik
- Department of Orthodontics, University Medical Center Groningen, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands.
| | - Marlotte B M Pijnenburg
- Center for Dentistry and Oral Hygiene, University of Groningen, University Medical Center Groningen, Antonius Deusinglaan 1, FB 21, 9713 AV, Groningen, The Netherlands
| | - Krista I Janssen
- Department of Orthodontics, University Medical Center Groningen, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands
| | - Yijin Ren
- Department of Orthodontics, University Medical Center Groningen, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands
| | - Anne Marie Kuijpers-Jagtman
- Department of Orthodontics, University Medical Center Groningen, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands
- Department of Orthodontics and Dentofacial Orthopedics, School of Dental Medicine/Medical Faculty, University of Bern, Hochschulstrasse 4, 3012, Bern, Switzerland
- Faculty of Dentistry, Universitas Indonesia, Campus Salemba, Jalan Salemba Raya No. 4, Jakarta, 10430, Indonesia
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Brown DV, Anttila CJA, Ling L, Grave P, Baldwin TM, Munnings R, Farchione AJ, Bryant VL, Dunstone A, Biben C, Taoudi S, Weber TS, Naik SH, Hadla A, Barker HE, Vandenberg CJ, Dall G, Scott CL, Moore Z, Whittle JR, Freytag S, Best SA, Papenfuss AT, Olechnowicz SWZ, MacRaild SE, Wilcox S, Hickey PF, Amann-Zalcenstein D, Bowden R. A risk-reward examination of sample multiplexing reagents for single cell RNA-Seq. Genomics 2024; 116:110793. [PMID: 38220132 DOI: 10.1016/j.ygeno.2024.110793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 11/29/2023] [Accepted: 01/09/2024] [Indexed: 01/16/2024]
Abstract
Single-cell RNA sequencing (scRNA-Seq) has emerged as a powerful tool for understanding cellular heterogeneity and function. However the choice of sample multiplexing reagents can impact data quality and experimental outcomes. In this study, we compared various multiplexing reagents, including MULTI-Seq, Hashtag antibody, and CellPlex, across diverse sample types such as human peripheral blood mononuclear cells (PBMCs), mouse embryonic brain and patient-derived xenografts (PDXs). We found that all multiplexing reagents worked well in cell types robust to ex vivo manipulation but suffered from signal-to-noise issues in more delicate sample types. We compared multiple demultiplexing algorithms which differed in performance depending on data quality. We find that minor improvements to laboratory workflows such as titration and rapid processing are critical to optimal performance. We also compared the performance of fixed scRNA-Seq kits and highlight the advantages of the Parse Biosciences kit for fragile samples. Highly multiplexed scRNA-Seq experiments require more sequencing resources, therefore we evaluated CRISPR-based destruction of non-informative genes to enhance sequencing value. Our comprehensive analysis provides insights into the selection of appropriate sample multiplexing reagents and protocols for scRNA-Seq experiments, facilitating more accurate and cost-effective studies.
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Affiliation(s)
- Daniel V Brown
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia.
| | - Casey J A Anttila
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia
| | - Ling Ling
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia
| | - Patrick Grave
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia
| | - Tracey M Baldwin
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia
| | - Ryan Munnings
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Anthony J Farchione
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Vanessa L Bryant
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia; The Royal Melbourne Hospital, 300 Grattan St, Parkville, Melbourne 3010, VIC, Australia
| | - Amelia Dunstone
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia
| | - Christine Biben
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Samir Taoudi
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Tom S Weber
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Shalin H Naik
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Anthony Hadla
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Holly E Barker
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Cassandra J Vandenberg
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Genevieve Dall
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Clare L Scott
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Zachery Moore
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - James R Whittle
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia; Peter MacCallum Cancer Centre, 305 Grattan St, Parkville, Melbourne 3010, VIC, Australia
| | - Saskia Freytag
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Sarah A Best
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Anthony T Papenfuss
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia; Peter MacCallum Cancer Centre, 305 Grattan St, Parkville, Melbourne 3010, VIC, Australia
| | - Sam W Z Olechnowicz
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Sarah E MacRaild
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia
| | - Stephen Wilcox
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia
| | - Peter F Hickey
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Daniela Amann-Zalcenstein
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia
| | - Rory Bowden
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade VIC, Melbourne 3052, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, Melbourne 3010, VIC, Australia.
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Pacha MM, Fleming PS, Shagmani M, Johal A. The skeletal and dental effects of Hanks Herbst versus twin block appliances for class II correction in growing patients: a randomized clinical trial. Eur J Orthod 2024; 46:cjad065. [PMID: 37930325 DOI: 10.1093/ejo/cjad065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2023]
Abstract
BACKGROUND Despite the popularity of the Twin Block (TB) and the Hanks Herbst (HH) functional appliances, there is limited prospective research comparing these removable and fixed designs, respectively. OBJECTIVES To evaluate and compare the skeletal and dental effects associated with TB and HH functional appliances as well as to detect factors that might influence the success or failure of treatment in adolescents with Class II malocclusion. DESIGN AND SETTING A parallel-group randomized controlled trial was undertaken in a single-centre hospital in the United Kingdom. METHODS A total of 80 participants (aged 10-14 years) with overjet of 7 mm or more were randomized to receive either the HH or TB appliance. Cephalometric radiographs were collected at the start of the study and immediately after the withdrawal of the functional appliances and measured using Pancherz analysis. Participants were allocated to the TB or HH group, based on an electronic randomization, stratified for gender and allocation concealed. Blinding to the allocated arm was not possible. However, all data were coded and anonymized to ensure that assessors were blinded to the group allocation. The main outcome was the anterior-posterior skeletal and dento-alveolar changes at the end of the functional phase. RESULTS Fifteen (37.5%) participants from the TB group and 7 (15.5%) from HH failed to achieve full overjet reduction (<4 mm) after 12 months of treatment. Overjet reduction was 2 mm greater with HH compared to TB (P = .05; 95% CI: 0.2, 3.2). No significant differences regarding skeletal and dental changes were reported, with the exception that participants in HH group experienced greater lower molar protraction (P = .002; 95% CI: -2.8, -0.8) and mandibular incisors advancement (P = .001; 95% CI: -2.9, -1), indicating greater dental than skeletal effects. CONCLUSION The TB appliance was associated with a higher rate of treatment discontinuation. No significant clinical differences were observed in the skeletal and dental effects, although the HH may be associated with more pronounced effects on the mandibular dentition. CLINICAL TRIAL REGISTRATION The protocol was registered online before the start of the trial (ISRCTN11717011).
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Affiliation(s)
- Moaiyad M Pacha
- Centre for Oral Bioengineering, Institute of Dentistry, Queen Mary University London, London, United Kingdom
| | - Padhraig S Fleming
- Division of Public and Child Dental Health, Dublin Dental University Hospital, Trinity College Dublin, Dublin, Ireland
| | - Muftah Shagmani
- Department of Orthodontics, William Harvey Hospital, East Kent Hospitals University NHS Foundation Trust, Kent, United Kingdom
| | - Ama Johal
- Centre for Oral Bioengineering, Institute of Dentistry, Queen Mary University London, London, United Kingdom
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Barbosa EGP, Lima SNL, de Araújo Gurgel J, Fernandes ES, Neto SMP, de Jesus Tavarez RR, da Silva KL, Loguercio AD, Pinzan-Vercelino CRM. Inflammatory parameters and color alterations of dental bleaching in patients wearing fixed orthodontic appliance: a randomized clinical trial. BMC Oral Health 2023; 23:602. [PMID: 37641077 PMCID: PMC10463358 DOI: 10.1186/s12903-023-03301-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 08/10/2023] [Indexed: 08/31/2023] Open
Abstract
BACKGROUND Many orthodontic patients request dental bleaching during orthodontic treatment to achieve a faster aesthetic resolution, however, no attention has been paid to the inflammatory processes that can occur when both therapies are indicated together. So, this clinical trial evaluated the inflammatory parameters and color alterations associated with dental bleaching in patients wearing a fixed orthodontic appliance. METHODS Thirty individuals aged between 18 and 40 years were equally and randomly allocated into three groups: FOA (fixed orthodontic appliance), BLE (dental bleaching), and FOA + BLE (fixed orthodontic appliance + dental bleaching). The orthodontic appliances and the bleaching procedures were performed in the maxillary premolars and molars. For dental bleaching a 35% hydrogen peroxide was used. The gingival crevicular fluid (GCF) and nitric oxide (NO-) levels were evaluated at different time-points. Color evaluation was performed using an Easyshade spectrophotometer at baseline (FOA, FOA + BLE, BLE), one month after (FOA + BLE) and 21 days after appliance removing (FOA + BLE and FOA groups), in each tooth bleached. The ANOVA and Tukey's tests, with a significance level of 5%, were used for statistical analysis. RESULTS The GCF volume in the FOA + BLE and FOA groups significantly increased at the time points evaluated (p < 0.001); however, this did not occur in the BLE group (p > 0.05). On the other hand, NO- levels significantly decreased during dental bleaching with or without fixed orthodontic appliances (FOA + BLE and BLE groups; p < 0.05), while no significant changes were observed in the FOA group (p > 0.05). Significant changes in color were observed in the FOA + BLE and BLE groups compared to in the FOA group (p < 0.01). However, the presence of fixed orthodontic appliance (FOA + BLE) negatively affected the bleaching efficacy compared to BLE group (p < 0.01). CONCLUSIONS Dental bleaching did not increase the inflammatory parameters in patients wearing fixed orthodontic appliance. However, in the presence of orthodontic appliances, the bleaching efficacy was lower than that of bleaching teeth without orthodontic appliances. TRIAL REGISTRATION RBR-3sqsh8 (first trial registration: 09/07/2018).
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Affiliation(s)
| | | | | | | | | | | | - Karine Letícia da Silva
- Department of Restorative Dentistry, Ponta Grossa State University, Rua Carlos Cavalcanti, 4748, Bloco M, Sala 64A - Uvaranas, Ponta Grossa, 84030- 900, Paraná, Brazil
| | - Alessandro D Loguercio
- Department of Restorative Dentistry, Ponta Grossa State University, Rua Carlos Cavalcanti, 4748, Bloco M, Sala 64A - Uvaranas, Ponta Grossa, 84030- 900, Paraná, Brazil.
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Kotnala A, Anderson DMG, Messinger JD, Curcio CA, Schey KL. Untargeted Lipidomic Profiling of Aged Human Retina With and Without Age-Related Macular Degeneration (AMD). Adv Exp Med Biol 2023; 1415:37-42. [PMID: 37440011 DOI: 10.1007/978-3-031-27681-1_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/14/2023]
Abstract
The molecular characterization of extracellular deposits is crucial to understanding the clinical progression of AMD. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis is a powerful analytical discovery tool capable of identifying lipids in an untargeted manner. NanoLC-MS/MS is an analytical tool capable of identifying lipids with high sensitivity and minimum sample usage. Hence, the purpose of this study was to compare retina lipid identification from RPE-choroid samples using high flow LC-MS/MS and nanoLC-MS/MS. Manually dissected paraformaldehyde-fixed human donor tissues sections were used for LC-MS/MS and nanoLC-MS/MS analysis. Lipids were extracted with MeOH/MTBE/CHCl3 (MMC) and were analyzed by LC-MS/MS and nanoLC-MS/MS using negative and positive ionization modes. Untargeted lipidomics using LC-MS/MS identified 215 lipids from 4 lipid classes and 15 subclasses. We observed a 78% increase in lipid identifications using nanoLC-MS/MS with lipid numbers totaling 384. The nanoLC-MS/MS method is expected to provide extensive lipid identifications from small retina samples, e.g., from drusen and drusenoid deposits in aged and AMD eyes, and could help elucidate how lipids are involved in extracellular deposit formation in AMD.
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Affiliation(s)
- Ankita Kotnala
- Department of Biochemistry, Vanderbilt University, Nashville, TN, USA
- Department of Ophthalmology, University of Alabama at Birmingham, Birmingham, AL, USA
| | | | - Jeffrey D Messinger
- Department of Ophthalmology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Christine A Curcio
- Department of Ophthalmology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Kevin L Schey
- Department of Biochemistry, Vanderbilt University, Nashville, TN, USA.
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Guo Q, Xu T, Wang H, Chen F, Guo X, Lu X, Ni B. One-Stage Anterior Retropharyngeal Release Followed by Posterior Open Reduction and Intra-Articular Cage Fusion for Treating Chronic Fixed Type III Atlantoaxial Rotatory Fixation. World Neurosurg 2022; 167:e1413-e1418. [PMID: 36122856 DOI: 10.1016/j.wneu.2022.09.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/11/2022] [Accepted: 09/12/2022] [Indexed: 10/31/2022]
Abstract
OBJECTIVE To verify the effectiveness of anterior retropharyngeal release followed by posterior open reduction using long arm reduction screws combined with intra-articular fusion with a cage filled with the local autologous bone for treating fixed Type III atlantoaxial rotatory fixation (AARF). METHODS Data from 6 children with fixed AARF were retrospectively reviewed. All patients underwent anterior retropharyngeal release followed by posterior open reduction using long-arm reduction screws combined with intra-articular fusion with a cage filled with local autologous bone. Outcomes were measured using the atlantodental interval value, the Japanese Orthopedic Association score and visual analog scale for neck pain. Patient age, sex, operation time, blood loss, and bone fusion time were recorded. Complications related to the operation were also recorded. RESULTS All patients achieved complete reduction and solid bone fusion at follow-up. The atlantodental interval dropped to 2.1 ± 0.5 mm after the operation from a preoperative score of 15.3 ± 3.1 mm (P < 0.05). Japanese Orthopedic Association score significantly improved from a preoperative score of 15.3 ± 0.5 to 17 ± 0 at the final follow-up (P < 0.05). Visual analog scale for neck pain markedly decreased from preoperative 4.5 ± 1.0 to 0.2 ± 0.4 at the final follow-up (P < 0.05). No complication related to the surgical approach or instrumentation was observed. CONCLUSIONS One-stage anterior retropharyngeal release followed by posterior open reduction combined with intra-articular cage fusion is effective in treating chronic fixed type III AARF.
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Affiliation(s)
- Qunfeng Guo
- Department of Orthopedics, Shanghai Changzheng Hospital, Naval Medical University, Shanghai, People's Republic of China
| | - Tianming Xu
- Department of Orthopedics, Shanghai Changzheng Hospital, Naval Medical University, Shanghai, People's Republic of China; Department of Orthopedics, 905th Hospital of PLA Navy, Shanghai, People's Republic of China
| | - Haibin Wang
- Department of Orthopedics, Shanghai Changzheng Hospital, Naval Medical University, Shanghai, People's Republic of China
| | - Fei Chen
- Department of Orthopedics, Shanghai Changzheng Hospital, Naval Medical University, Shanghai, People's Republic of China
| | - Xiang Guo
- Department of Orthopedics, Shanghai Changzheng Hospital, Naval Medical University, Shanghai, People's Republic of China
| | - Xuhua Lu
- Department of Orthopedics, Shanghai Changzheng Hospital, Naval Medical University, Shanghai, People's Republic of China
| | - Bin Ni
- Department of Orthopedics, Shanghai Changzheng Hospital, Naval Medical University, Shanghai, People's Republic of China.
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Mokokwe G, Letshwenyo MW. Investigation of clay brick waste for the removal of copper, nickel and iron from aqueous solution: batch and fixed - bed column studies. Heliyon 2022; 8:e09963. [PMID: 35874057 PMCID: PMC9304740 DOI: 10.1016/j.heliyon.2022.e09963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 04/09/2022] [Accepted: 07/12/2022] [Indexed: 11/10/2022] Open
Abstract
The adsorption of copper, iron and nickel ions from an aqueous solution using Makoro granite clay brick waste through batch and fixed – bed column modes was investigated. The adsorbent was characterised using X-Ray Fluorescence, X-Ray Diffraction (XRD), Thermogravimetric Analysis, and Scanning Electron Microscopy (SEM). XRD results revealed crystalline peaks of Quartz (51.28 %) and mullite (23.40%) in fresh and loaded adsorbent with unnotable changes before and after adsorption. SEM images indicate the presence of micro pores and irregularly distributed surfaces. Batch kinetic maximum adsorption capacities for iron, copper, and nickel are 7.60, 6.70 and 6.20 mg g−1 media respectively with 60 min as the optimum time. The maximum adsorption capacities at adsorbent dosage of 5 g L−1 were 10.0, 7.60 and 7.20 mg L−1 for iron, copper and nickel ions. The corresponding adsorption capabilities from the fixed-bed column reactor were 2.23, 2.22 and 0.74 mg g−1 media respectively. The thermodynamics parameters of enthalpy change (ΔH) were 5.21, 9.32 and 5.22 kJ mol−1 respectively for Copper, iron and nickel ions and the corresponding entropy change (ΔS) were -0.04, -0.05 and -0.03 kJmol−1K−1respectively and the process being non-spontaneous and exothermic. Thomas and Yoon-Nelson models yielded similar low coefficient of determination (R2) values (0.06 and 0.07) for copper and iron ions. Further investigations such as the use of real wastewater, competition of anions and further media characterisation and modifications are recommended.
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Affiliation(s)
- Gobusaone Mokokwe
- Botswana International University of Science and Technology, Faculty of Engineering and Technology, Botswana.,Department of Civil and Environmental Engineering, Private Bag 16, Palapye, Botswana
| | - Moatlhodi Wise Letshwenyo
- Botswana International University of Science and Technology, Faculty of Engineering and Technology, Botswana.,Department of Civil and Environmental Engineering, Private Bag 16, Palapye, Botswana
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Ahmed A, Fida M, Habib S, Javed F, Ali US. Effect of Direct versus Indirect Bonding Technique on the Failure Rate of Mandibular Fixed Retainer-A Systematic Review and Meta-Analysis. Int Orthod 2021; 19:539-547. [PMID: 34629308 DOI: 10.1016/j.ortho.2021.09.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 09/19/2021] [Indexed: 01/12/2023]
Abstract
INTRODUCTION Fixed retainer failure is a common cause of relapse and may require additional orthodontic treatment. The two main methods for bonding the mandibular fixed retainer include direct and indirect techniques. This topic has not been explored previously in a systematic review. Therefore, the objective of this systematic review was to evaluate the effect of direct versus indirect bonding technique on the failure rate of mandibular fixed retainer. METHODS Online databases (PubMed, Dental and Oral Science, CINAHL, and Cochrane Central Register of Controlled Trials, Scopus) were systematically searched electronically for articles up until April 2021. Google Scholar and clinicaltrials.gov databases were utilized for hand searching. Randomized, non-randomized clinical trials and cohort studies on human subjects were considered regardless of language or year of publication. Orthodontic patients in their retention phase (mandibular 3×3 fixed retainer), in which the retainer was bonded using direct bonding technique as control and indirect as intervention were included. The outcome assessed was retainer failure rate. Two authors independently examined and extracted the data from the studies that satisfied the inclusion criteria. Risk of bias in clinical trials was assessed using the Cochrane Collaboration's tool, whereas risk of bias in cohort studies was assessed using the Newcastle-Ottawa Scale. The meta-analysis was conducted using the RevMan software V.5.3.5.22. The outcome was estimated using weighted average difference and 95% confidence intervals (CIs). The studies' heterogeneity was assessed using Cochrane's heterogeneity test (I2 Test). RESULTS Four articles fulfilling the inclusion criteria were included in qualitative and quantitative synthesis. Retainer failure rates were analysed in a total number of 266 patients bonded with mandibular 3×3 retainers after orthodontic therapy. Direct bonding technique of fixed retainer on 131 patients was compared with indirect technique on 135 patients. There was no statistically significant difference in the rate of retainer failure between the two methods (95% CI, 0.67, 1.40). CONCLUSIONS Within the limitations of insufficient evidence this systematic review and meta-analysis concluded that there is no difference in the failure rate of mandibular fixed retainers between direct and indirect bonding techniques. Due to the scarcity of available data, further studies are needed to establish definitively one's clinical benefit over the other.
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Affiliation(s)
- Aqeel Ahmed
- Section of Dentistry, Department of Surgery, The Aga Khan University Hospital, P.O Box 3500, Stadium Road, 74800 Karachi, Pakistan.
| | - Mubassar Fida
- Section of Dentistry, Department of Surgery, The Aga Khan University Hospital, P.O Box 3500, Stadium Road, 74800 Karachi, Pakistan
| | - Saqib Habib
- Section of Dentistry, Department of Surgery, The Aga Khan University Hospital, P.O Box 3500, Stadium Road, 74800 Karachi, Pakistan
| | - Faizan Javed
- Section of Dentistry, Department of Surgery, The Aga Khan University Hospital, P.O Box 3500, Stadium Road, 74800 Karachi, Pakistan
| | - Umair Shoukat Ali
- Section of Dentistry, Department of Surgery, The Aga Khan University Hospital, P.O Box 3500, Stadium Road, 74800 Karachi, Pakistan
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Hantouly AT, Ahmed AF, Alzobi O, Toubasi A, Salameh M, Elmhiregh A, Hameed S, Ahmed GO, Alvand A, Al Dosari MAA. Mobile-bearing versus fixed-bearing total knee arthroplasty: a meta-analysis of randomized controlled trials. Eur J Orthop Surg Traumatol 2021; 32:481-495. [PMID: 34021791 PMCID: PMC8924090 DOI: 10.1007/s00590-021-02999-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 04/09/2021] [Indexed: 11/24/2022]
Abstract
Objective The purpose of this study was to perform a meta-analysis comparing mobile-bearing with fixed-bearing total knee arthroplasty (TKA) in terms of all-cause revision rates, aspetic loosening, knee functional scores, range of motion and radiographic lucent lines and osteolysis. Methods PubMed, Cochrane Library, Google Scholar and Web of Science were searched up to January 2020. Randomized controlled trials that compared primary mobile-bearing with fixed-bearing TKA, reporting at least one of the outcomes of interest, at a minimum follow-up of 12 months were included. All outcomes of interest were pooled at short-term (< 5 years), mid-term (5 to 9 years) and long-term (> = 10 years) follow-up intervals. Results A total of 70 eligible articles were included in the qualitative and statistical analyses. There was no difference between mobile-bearing or fixed-bearing TKA at short-term, mid-term and long-term follow-ups in all outcome measures including all-cause revision rate, aseptic loosening, oxford knee score, knee society score, Hospital for Special Surgery score, maximum knee flexion, radiographic lucent lines and radiographic osteolysis. Conclusion The current level of evidence demonstrated that both mobile-bearing and fixed-bearing designs achieved excellent outcomes, yet it does not prove the theoretical advantages of the mobile-bearing insert over its fixed-bearing counterpart. The use of either design could therefore be supported based on the outcomes assessed in this study. Level of Evidence: Level II, Therapeutic Supplementary information The online version contains supplementary material available at (10.1007/s00590-021-02999-x).
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Affiliation(s)
- Ashraf T Hantouly
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Abdulaziz F Ahmed
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar.
| | - Osama Alzobi
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Ammar Toubasi
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Motasem Salameh
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Aissam Elmhiregh
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Shamsi Hameed
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Ghalib O Ahmed
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Abtin Alvand
- Nuffield Department of Orthopaedics, Rheumatology & Musculoskeletal Sciences, University of Oxford, Oxford, UK
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Pirc M, Harbeck O, Sapata VM, Hüsler J, Jung RE, Hämmerle CHF, Thoma DS. Contour changes of peri-implant tissues are minimal and similar for a one- and a two-piece implant system over 12 years. Clin Oral Investig 2021; 25:719-27. [PMID: 33063219 DOI: 10.1007/s00784-020-03638-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 10/07/2020] [Indexed: 01/23/2023]
Abstract
Objectives To assess contour changes of peri-implant tissues comparing a one- and a two-piece dental implant system over 12 years. Materials and methods Patients seeking implant therapy were enrolled and randomly allocated to receive implants (a one-piece (STM) or a two-piece (BRA) system). Impressions were taken at the time of insertion of the final reconstruction (BL), after 1 year (FU-1), 5 years (FU-5), and at 12 years (FU-12). Thirty patients were included in the analysis (STM, 16; BRA, 14). Digital scans of casts were superimposed and analyzed in an image analysis program. Measurements included changes of the crown height, contour changes on the buccal side of the implants and the contralateral teeth (control). Results Contour changes at implant sites revealed a loss of − 0.29 mm (STM) and − 0.46 mm (BRA) during an observation period of 12 years. Contour changes at the corresponding tooth sites amounted to − 0.06 mm (STM) and − 0.12 mm (BRA) during the same time period. The implant crown gained 0.25 mm (STM) and 0.08 mm (BRA) in height due to recession of the marginal mucosa. The corresponding gain in crown height at the contralateral tooth sites amounted to 0.36 mm (STM) and 0.10 mm (BRA). Interproximal marginal bone level changes measured − 0.28 mm (STM) and − 1.11 mm (BRA). The mean BOP amounted to 38.8% (STM) and 48.7% (BRA) at the 12-year follow-up (FU-12). Conclusion Minimal changes of the peri-implant soft tissue contour were observed at implant sites over the period of 12 years irrespective of the use of a one- or a two-piece implant system. The differences between the implant sites and corresponding teeth were clinically negligible. Clinical relevance Peri-implant soft tissue stability is of high clinical relevance when monitoring dental implant sites on the long run. Clinical data on the extent of soft tissue changes around different implant systems are scarce. The present RCTs demonstrate minimal changes of the peri-implant soft tissue contour 12 years after implant insertion independent of the use of a one- or a two-piece implant system.
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12
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Abu Al-Rub Z, Lamb JN, West RM, Yang X, Hu Y, Pandit HG. Survivorship of fixed vs mobile bearing unicompartmental knee replacement: A systematic review and meta-analysis of sixty-four studies and National Joint Registries. Knee 2020; 27:1635-1644. [PMID: 33010783 DOI: 10.1016/j.knee.2020.09.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 07/13/2020] [Accepted: 09/05/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Unicompartmental knee replacement (UKR) prostheses can use fixed (FB) or mobile bearing (MB) constructs. We compared survivorship and failure modes of both designs. METHODS The inclusion criteria were studies published between 2005 and 2020 with minimum average follow-up of five years reporting the survival and/or number of revisions of specific designs in medial and lateral UKRs. Pooled rate of revision per 100 patient years (PTIR) was estimated using a random effects model. RESULTS Seventy cohorts of 17,405 UKRs with weighted mean follow-up of 7.3 years (0.1-29.4 years) were included. A total of 170,923 UKRs were identified in registry reports at a weighted mean implant survival time of 15.4 years. PTIR in MB UKR versus FB UKR was similar [1.45 vs 1.40, (p = 0.8)]. In cohort studies, the overall PTIR for MB was also similar to FB [1.03 vs 0.78, (p = 0.1)]. For medial UKR, the PTIR for MB was marginally greater but not significantly different to FB [0.96 vs 0.81, (p = 0.3)], whilst for lateral UKR, the PTIR for MB was significantly worse than for FB [2.20 vs 0.72, (p < 0.01)]. Polyethylene wear is more common in FB implants, whilst MB implants are revised more often for bearing dislocation. CONCLUSIONS Overall implant survival in mid- to long-term studies is similar for MB versus FB medial UKRs. MB have a four-fold higher risk of revision in comparison to FB when used for lateral UKR.
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Affiliation(s)
- Z Abu Al-Rub
- Leeds Teaching Hospitals NHS Trust, Beckett Street, Leeds LS9 7TF, UK
| | - J N Lamb
- Leeds Institute of Rheumatic and Musculoskeletal Medicine (LIRMM), School of Medicine, University of Leeds, Chapel Allerton Hospital, Leeds LS7 4SA, UK; Leeds Teaching Hospitals NHS Trust, Beckett Street, Leeds LS9 7TF, UK.
| | - R M West
- Leeds Institute of Health Sciences, School of Medicine, University of Leeds, Leeds LS2 9NL, UK
| | - X Yang
- Xiangya Hospital, No 87, Xiangya Road, Kaifu District, Changsha, Hunan Province, China
| | - Y Hu
- Xiangya Hospital, No 87, Xiangya Road, Kaifu District, Changsha, Hunan Province, China
| | - H G Pandit
- Leeds Institute of Rheumatic and Musculoskeletal Medicine (LIRMM), School of Medicine, University of Leeds, Chapel Allerton Hospital, Leeds LS7 4SA, UK; Leeds Teaching Hospitals NHS Trust, Beckett Street, Leeds LS9 7TF, UK
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13
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Desai VR, Sadrameli SS, Jenson AV, Asante SK, Daniels B, Trask TW, Britz G. Ventriculoperitoneal shunt complications in an adult population: A comparison of various shunt designs to prevent overdrainage. Surg Neurol Int 2020; 11:269. [PMID: 33033631 PMCID: PMC7538957 DOI: 10.25259/sni_38_2020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 06/09/2020] [Indexed: 11/10/2022] Open
Abstract
Background: Overdrainage after cerebrospinal fluid diversion remains a significant morbidity. The hydrostatic, gravitational force in the upright position can aggravate this. Siphon control (SC) mechanisms, as well as programmable and flow regulating devices, were developed to counteract this. However, limited studies have evaluated their safety and efficacy. In this study, direct comparisons of the complication rates between siphon control (SC) and non-SC (NSC), fixed versus programmable, and flow- versus pressure regulating valves are undertaken. Methods: A retrospective chart review was performed over all shunt implantations from January 2011 to December 2016 within the Houston Methodist Hospital system. Complication rates within 6 months of the operative date, including infection, subdural hematoma, malfunction, and any other shunt-related complication, were analyzed via Fisher’s exact test, with P < 0.05 regarded as significant. Subgroup analyses based on diagnoses – normal pressure hydrocephalus (HCP), pseudotumor cerebri, or other HCP – were also performed. Results: The overall shunt-related complication rate in this study was 19%. Overall rates of infection, shunt failure, and readmission within 180 days were 3%, 11%, and 34%, respectively. No difference was seen between SC and NSC groups in any complication rate overall or on subgroup analyses. When comparing fixed versus programmable and flow- versus pressure-regulating valves, the latter in each analysis had significantly lower malfunction and total complication rates. Conclusions: Programmable and pressure regulating devices may lead to lower shunt malfunction and total complication rates. Proper patient selection should guide valve choice. Future prospective studies may further elucidate the difference in complication rates between these various shunt designs.
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Affiliation(s)
- Virendra Rajendrakumar Desai
- Department of Neurosurgery, Houston Methodist Neurological Institute, Houston Methodist Hospital, Houston, Texas, United States
| | - Saeed Sam Sadrameli
- Department of Neurosurgery, Houston Methodist Neurological Institute, Houston Methodist Hospital, Houston, Texas, United States
| | - Amanda V Jenson
- Department of Neurosurgery, Houston Methodist Neurological Institute, Houston Methodist Hospital, Houston, Texas, United States
| | - Samuel K Asante
- Department of Neurosurgery, Houston Methodist Neurological Institute, Houston Methodist Hospital, Houston, Texas, United States
| | - Bradley Daniels
- Department of Neurosurgery, Houston Methodist Neurological Institute, Houston Methodist Hospital, Houston, Texas, United States
| | - Todd W Trask
- Department of Neurosurgery, Houston Methodist Neurological Institute, Houston Methodist Hospital, Houston, Texas, United States
| | - Gavin Britz
- Department of Neurosurgery, Houston Methodist Neurological Institute, Houston Methodist Hospital, Houston, Texas, United States
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Abstract
INTRODUCTION Late chronic periprosthetic infections (LCPIs) are worrisome complications of primary hip arthroplasties. The gold standard procedure is the 2-stage revision. 1-stage exchange is gaining popularity in order to reduce the invasivity of the former technique. A partial 2-stage exchange technique, retaining fixed components, may overcome some of the drawbacks of the previous techniques, allowing a much easier reconstruction step. METHODS 28 patients with a LCPI after a primary total hip arthroplasty underwent a first removal stage: the loosened component was removed (23 cups and 5 stems) and the fixed component, with no local signs of infection, was retained. An antibiotic hand molded spacer was positioned in 16 cases. After a mean time of 8 months and a tailored antimicrobial therapy, the spacer was removed and the implant was revised. RESULTS The mean follow-up was 5 years. The HHS score was 82.7. 4 cases failed (2 patients presenting a septic relapse after revision and 2 patients undergoing Girdlestone arthroplasty), achieving a survival rate of 83.4% at 5 years. 2 patients were unwilling to perform a further procedure and did not proceed to the second stage. All the other patients had no clinical, radiological, laboratory signs of septic relapse. CONCLUSIONS The partial 2-stage approach seems a promising technique for LCPI in selected cases, with good infection control. It allows an easier revision by sparing the fixed components. Larger case series and longer follow-ups are needed to confirm the results and identify the limits of this approach.
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Affiliation(s)
- Francesco Castagnini
- Orthopedics-Traumatology and Prosthetic surgery and hip and knee replanting, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Giuseppe Tella
- Orthopedics-Traumatology and Prosthetic surgery and hip and knee replanting, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Maurizio Montalti
- Orthopedics-Traumatology and Prosthetic surgery and hip and knee replanting, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Federico Biondi
- Orthopedics-Traumatology and Prosthetic surgery and hip and knee replanting, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Barbara Bordini
- Laboratory of Medical Technology, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Luca Busanelli
- Orthopedics-Traumatology and Prosthetic surgery and hip and knee replanting, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Aldo Toni
- Laboratory of Medical Technology, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
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15
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Pinzan-Vercelino CRM, de Araújo Gurgel J, Bramante FS, Pessoa TF, Albertin SA, Fialho MPN, Pinzan A. Coated nickel titanium archwires and their uncoated counterparts: In-vitro contemporary comparison of unloading forces. Int Orthod 2020; 18:374-9. [PMID: 32037208 DOI: 10.1016/j.ortho.2020.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 01/02/2020] [Accepted: 01/10/2020] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To compare the unloading forces between aesthetic nickel titanium (NiTi) wires coated with rhodium and epoxy resin, as well as their uncoated equivalents. Additionally, intragroup comparisons between the different deactivation forces were evaluated, and the inner alloy cores were determined. MATERIAL AND METHODS Forty-four 0.018" NiTi wire segments were equally divided into 4 groups: E- NiTi coated with epoxy resin, C- NiTi uncoated, R- heat-activated NiTi coated with rhodium, and T- heat-activated NiTi uncoated. The unloading values were recorded at 0.5, 1, 2, and 3mm using a 3-point bending test, according to the method in ISO Standard 15.841. Cross-sectional scanning electron microscopy was used to assess the inner alloy core thickness of the wires. RESULTS The intergroup comparison was successively: at 0.5mm: E (1.21)>C (0.60)=R (0.63)=T (0.58); at 1mm: E (1.30)=C (1.23)>R (0.91)=T (0.80); at 2mm:C (1.93)>E (1.36)=R (1.20) and R (1.20)=T (1.00) and E (1.36)>T (1.00); at 3mm:C (2.44)>R (2.02)>E (1.62)=T (1.68). The intragroup comparisons showed for all groups that the forces were statistically higher at 3mm than the other deactivations (p<0.01). Group E presented a reduced inner alloy core (.0155). CONCLUSION The unloading forces demonstrated variability between the wires tested and between the different deactivations. Therefore, depending on the type of movement required and the periodontal conditions, orthodontists should pay attention during archwire selection.
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16
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Dans KC, Freeman SR, Lin T, Meshi A, Olivas S, Cheng L, Amador-Patarroyo MJ, Freeman WR. Durability of every-8-week aflibercept maintenance therapy in treatment-experienced neovascular age-related macular degeneration. Graefes Arch Clin Exp Ophthalmol 2019; 257:741-748. [PMID: 30806775 DOI: 10.1007/s00417-018-04232-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Revised: 12/18/2018] [Accepted: 12/22/2018] [Indexed: 12/31/2022] Open
Abstract
PURPOSE To determine the proportion of treatment-experienced eyes with exudative age-related macular degeneration successfully treated with every-4-week aflibercept that can be kept dry on fixed every-8-week aflibercept injections (maintenance). METHODS In this retrospective chart review, we evaluated our cohort of patients treated with a treatment paradigm for CNV in AMD. Initially, patients were treated with bevacizumab or ranibizumab and switched to every-4-week aflibercept when therapeutic responses were not durable or were suboptimal. Maintenance every-8-week therapy was initiated when the retina was completely dry on every-4-week aflibercept therapy. The primary outcome measure was recurrence of exudation on optical coherence tomography (OCT) during maintenance. RESULTS Thirty-six eyes of 31 consecutive patients with median age of 79 years (range, 65-89) were included. Maintenance was started after a median of 34 (range, 8-88) injections. Recurrence was observed in 20 eyes (55%). Of these, 11 eyes (31%) reactivated at 8 weeks. Median time to failure of maintenance schedule was 40 weeks by Kaplan-Meier analysis. Baseline demographic and anatomic characteristics were not associated with failure of maintenance schedule. CONCLUSION In treatment-experienced eyes that respond completely to every-4-week aflibercept, maintenance therapy with every-8-week injections can only temporarily maintain anatomic success with the majority of eyes developing recurring activity. This regimen fails early in one third of eyes and has a median effective duration of 40 weeks. Aflibercept appears to be inadequate to maintain control of exudation in most eyes in at least half of eyes undergoing long-term therapy.
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Affiliation(s)
- Kunny C Dans
- Department of Ophthalmology, Jacobs Retina Center at the Shiley Eye Institute, University of California San Diego, 9415 Campus Point Drive, La Jolla, CA, 92037, USA
| | - Sarah R Freeman
- Department of Ophthalmology, Jacobs Retina Center at the Shiley Eye Institute, University of California San Diego, 9415 Campus Point Drive, La Jolla, CA, 92037, USA
| | - Tiezhu Lin
- Department of Ophthalmology, Jacobs Retina Center at the Shiley Eye Institute, University of California San Diego, 9415 Campus Point Drive, La Jolla, CA, 92037, USA.,Department of Ophthalmology, He Eye Hospital, He University, Shenyang, China
| | - Amit Meshi
- Department of Ophthalmology, Jacobs Retina Center at the Shiley Eye Institute, University of California San Diego, 9415 Campus Point Drive, La Jolla, CA, 92037, USA.,Department of Ophthalmology, Rabin Medical Center, Petah Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Sergio Olivas
- Department of Ophthalmology, Jacobs Retina Center at the Shiley Eye Institute, University of California San Diego, 9415 Campus Point Drive, La Jolla, CA, 92037, USA
| | - Lingyun Cheng
- Department of Ophthalmology, Jacobs Retina Center at the Shiley Eye Institute, University of California San Diego, 9415 Campus Point Drive, La Jolla, CA, 92037, USA
| | - Manuel J Amador-Patarroyo
- Department of Ophthalmology, Jacobs Retina Center at the Shiley Eye Institute, University of California San Diego, 9415 Campus Point Drive, La Jolla, CA, 92037, USA.,Department of Ophthalmology, Escuela Superior de Oftalmologia, Instituto Barraquer de America, Bogota, Colombia
| | - William R Freeman
- Department of Ophthalmology, Jacobs Retina Center at the Shiley Eye Institute, University of California San Diego, 9415 Campus Point Drive, La Jolla, CA, 92037, USA.
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Abstract
PURPOSE The pain experience is highly variable among patients. Psychological mindsets, in which individuals view a particular characteristic as either fixed or changeable, have been demonstrated to influence people's actions and perceptions in a variety of settings including school, sports, and interpersonal. The purpose of this study was to determine if health mindsets influence the pain scores and immediate outcomes of post-operative surgical patients. METHODS As part of a multi-institutional, prospective, randomized clinical trial involving patients undergoing a minimally invasive pectus excavatum repair of pectus excavatum, patients were surveyed to determine whether they had a fixed or growth health mindset. Their post-operative pain was followed prospectively and scored on a Visual Analog Scale and outcomes were measured according to time to oral pain medication use. RESULTS Fifty patients completed the Health Beliefs survey, 17 had a fixed mindset (8 epidural, 9 PCA) and 33 had a growth mindset (17 epidural, 16 PCA). Patients with a growth mindset had lower post-operative pain scores than patients with a fixed mindset although pain medication use was not different. CONCLUSION This is the first usage of health mindsets as a means to characterize the perception of pain in the post-operative period. Mindset appears to make a difference in how patients perceive and report their pain. Interventions to improve a patient's mindset could be effective in the future to improve pain control and patient satisfaction.
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Affiliation(s)
- Joseph Sujka
- Department of Surgery, Children's Mercy Hospital, Kansas City, MO, 64108, USA
| | - Shawn St Peter
- Department of Surgery, Children's Mercy Hospital, Kansas City, MO, 64108, USA
| | - Claudia M Mueller
- Department of Surgery, Stanford University School of Medicine, 300 Pasteur, Alway M116, Stanford, CA, 94305, USA.
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18
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Massad J, Wicks R, Ahuja S, Cagna DR. A Prosthesis Retention System for Full-Arch, Fixed, Implant-Supported Prosthesis. J Prosthodont 2018; 28:e912-e916. [PMID: 30295369 DOI: 10.1111/jopr.12972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2018] [Indexed: 10/28/2022] Open
Abstract
Full-arch, fixed, implant-supported prostheses can be designed to be cement- or screw-retained. Both retention mechanisms have a few inherent disadvantages. A fixed attachment system has been introduced to circumvent the disadvantages of both screw and cement retention. This system eliminates the screw access holes and the use of cement. The number of intraoral procedures required is also reduced. The purpose of this article is to report a case using the Locator F-Tx Attachment System to facilitate fabrication of an esthetic, clinician-retrievable, full-arch implant-supported fixed dental prosthesis.
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Affiliation(s)
- Joseph Massad
- Department of Prosthodontics, University of Tennessee Health Science Center, College of Dentistry, Memphis, TN
| | - Russell Wicks
- Department of Prosthodontics, University of Tennessee Health Science Center, College of Dentistry, Memphis, TN
| | - Swati Ahuja
- Department of Prosthodontics, University of Tennessee Health Science Center, College of Dentistry, Memphis, TN
| | - David R Cagna
- Department of Prosthodontics, University of Tennessee Health Science Center, College of Dentistry, Memphis, TN
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Abstract
Total ankle arthroplasty is an increasingly popular procedure to address tibiotalar joint arthritis. Implant design and the rationale behind it have changed throughout the years. Newer generation implants allow for minimal resection of bone and use fixed-bearing technology. Long-term follow-up multicenter studies will determine the lifetime of these devices and their effectiveness in addressing pain and improving function for patients with endstage tibiotalar arthritis.
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Affiliation(s)
- Justin Tsai
- Department of Orthopaedic Surgery, SUNY Downstate College of Medicine, 450 Clarkson Avenue, Brooklyn, NY 11203, USA
| | - David I Pedowitz
- The Rothman Institute, 925 Chestnut Street, Philadelphia, PA 19107, USA.
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20
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Mamoun J. Post and core build-ups in crown and bridge abutments: Bio-mechanical advantages and disadvantages. J Adv Prosthodont 2017; 9:232-237. [PMID: 28680556 PMCID: PMC5483411 DOI: 10.4047/jap.2017.9.3.232] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 11/17/2016] [Accepted: 12/07/2016] [Indexed: 12/01/2022] Open
Abstract
Dentists often place post and core buildups on endodontically treated abutments for crown and bridge restorations. This article analyzes the bio-mechanical purposes, advantages and disadvantages of placing a core or a post and core in an endodontically treated tooth and reviews literature on post and core biomechanics. The author assesses the scientific rationale of the claim that the main purpose of a post is to retain a core, or the claim that posts weaken teeth. More likely, the main function of a post is to help prevent the abutment, on which a crown is cemented, from fracturing such that the abutment separates from the tooth root, at a fracture plane that is located approximately and theoretically at the level of the crown (or ferrule) margin. A post essentially improves the ferrule effect that is provided by the partial fixed denture prosthesis. This paper also explores the difference between bio-mechanical failures of crowns caused by lack of retention or excess taper, versus failures due to a sub-optimal ferrule effect in crown and bridge prostheses.
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Affiliation(s)
- John Mamoun
- Sunbeam Dental - General Dentistry, Manalapan, NJ, USA
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Hoyland G. General combined model for the hydrodynamic behaviour of fixed and fluidised granular beds. Water Res 2017; 111:163-176. [PMID: 28086113 DOI: 10.1016/j.watres.2017.01.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 12/09/2016] [Accepted: 01/02/2017] [Indexed: 06/06/2023]
Abstract
This work describes the derivation of a general mathematical model applicable to both fixed and fluidised granular beds, operating within the full hydrodynamic spectrum from viscous to inertial flows. The fundamental insight for the derivation of the model is that practical fluidised beds and fixed beds have similar hydrodynamic properties. The validity of the general model is demonstrated for fluid fractions up to 0.90. A crucial development in the general model is the replacement of hydraulic diameter, which has served as the size descriptor of flow paths in most fixed-bed models derived since the advent of the classic Blake-Kozeny equation. The new, replacement expression is based on the physical structure of the cross section of random porous beds. In addition, the general model contains a tortuosity factor, derived from the results of previous works involving computational fluid dynamics, to correct flow path length and fluid velocity. The model is constructed using regression analysis of experimental data from six previous major works and tested against previous models.
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Affiliation(s)
- Garry Hoyland
- Bluewater Bio Ltd, Winchester House, 259-269 Old Marylebone Road, London, NW1 5RA, UK.
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Abstract
During the 20(th) century, functional appliances evolved from night time wear to more flexible appliances for increased day time wear to full time wear with Twin Block appliances. The current trend is toward fixed functional appliances and this paper introduces the Fixed Twin Block, bonded to the teeth to eliminate problems of compliance in functional therapy. TransForce lingual appliances are pre-activated and may be used in first phase treatment for sagittal and transverse arch development. Alternatively, they may be integrated with fixed appliances at any stage of treatment.
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Affiliation(s)
- William J. Clark
- Private Practitioner of Orthodontics, Lundin Links, Scotland, United Kingdom
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