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Kayani B, Baawa J, Fontalis A, Tahmassebi J, Wardle N, Middleton R, Hutchinson J, Haddad FS. O014 Oxidised zirconium versus cobalt-chrome femoral heads in total hip arthroplasty: a multi-centre prospective double-blinded randomised controlled trial with 10-years follow-up. Br J Surg 2022. [DOI: 10.1093/bjs/znac242.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Abstract
Introduction
This study reports the ten-year polyethylene liner wear rates, incidence of osteolysis, clinical outcomes and complications of a three-arm, multicentre randomised controlled trial comparing Cobalt-Chrome (CoCr) and Oxidised Zirconium (OxZr) femoral heads with ultra-high molecular weight polyethylene (UHMWPE) versus highly cross-linked polyethylene(XLPE) liners in total hip arthroplasty (THA).
Methods
Patients undergoing THA from four institutions were prospectively randomised into three groups. Group A received a CoCrfemoral head and XLPE liner; Group B received an OxZrfemoral head and XLPE liner; and Group C received an OxZr femoral head and UHMWPE liner. Patients and observers recording study outcomes were blinded to the treatment groups at each follow-up interval. The outcomes of 262 study patients were analysed at ten years follow-up after THA.
Results
At ten years follow-up, increased linear wear rates were recorded in group C compared to group A (0.133 ± 0.21 mm/yr vs 0.031 ± 0.07 mm/yr respectively, p<0.001) and group B (0.133 ± 0.21 mm/yr vs 0.022 ± 0.05 mm/yr respectively, p<0.001). Patients in group C were associated with increased risk of osteolysis and aseptic loosening requiring revision surgery compared with group A (7/133 vs 0/133 respectively, p=0.007) and group B (7/133 vs 0/135 respectively, p=0.007).
Conclusion
The use of UHMWPE was associated with progressively increased annual liner wear rates after THA. At ten years follow-up, this translated to UHMWPE leading to an increased incidence of osteolysis and aseptic loosening requiring revision THA, compared with XLPE.
Take-home message
THA using XLPE liners is associated with improved long-term implant survivorship and reduced revision surgery compared with UHMWPE liners at long-term follow-up.
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Affiliation(s)
- B Kayani
- Department of Trauma and Orthopaedics, University College Hospital
| | - J Baawa
- Department of Trauma and Orthopaedics, University College Hospital
| | - A Fontalis
- Department of Trauma and Orthopaedics, University College Hospital
| | - J Tahmassebi
- Department of Trauma and Orthopaedics, University College Hospital
| | - N Wardle
- Department of Trauma and Orthopaedics, University College Hospital
| | - R Middleton
- Department of Trauma and Orthopaedics, University College Hospital
| | - J Hutchinson
- Department of Trauma and Orthopaedics, University College Hospital
| | - FS Haddad
- Department of Trauma and Orthopaedics, University College Hospital
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BaniHani A, Tahmassebi J, Zawaideh F. Maternal knowledge on early childhood caries and barriers to seek dental treatment in Jordan. Eur Arch Paediatr Dent 2020; 22:433-439. [PMID: 33210223 PMCID: PMC8213663 DOI: 10.1007/s40368-020-00576-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 10/20/2020] [Indexed: 11/29/2022]
Abstract
Purpose To assess maternal knowledge, attitudes and beliefs of Early Childhood Caries (ECC) risk factors and to determine barriers in seeking dental treatment among children with ECC. Methods A total of 600 mothers of healthy children, aged 3–5 years, with ECC attending maternity and child health centres in Jordan completed a questionnaire using face-to-face interviews. ECC was diagnosed clinically by the chief investigator, based on the diagnostic criteria suggested by American Academy of Paediatric Dentistry (AAPD), and caries was recorded using dmft index. Results The majority of the children had poor oral health status (99.2%) with a dmft index of 6.04 (± 1.2). Less than third (25.7%) of the mothers believed that their child had poor oral health with more than half (53.3%) not being aware that their child had dental caries. Most of the mothers had poor knowledge, attitudes and beliefs regarding their children’s oral health (82%). Participants` oral health knowledge was significantly associated with mothers` level of education and profession (p < 0.05). In addition, there was delay in seeking dental treatment for their children by the majority (65.9%) of mothers. Maternal profession, family income and time needed to reach a nearby health centre were found to be significant barriers in seeking dental treatment (p < 0.05). Conclusion The majority of the mothers of children in Jordan with ECC had poor knowledge about their children’s oral health status. Moreover, seeking dental treatment was delayed by a large number of mothers of children with ECC.
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Affiliation(s)
- A BaniHani
- School of Dentistry/Faculty of Medicine and Health, NIHR Clinical Lecturer and Specialist Registrar in Pediatric Dentistry, University of Leeds, Level 6/Worsley Building, Leeds, LS2 9LU, UK.
| | - J Tahmassebi
- School of Dentistry/Faculty of Medicine and Health, NIHR Clinical Lecturer and Specialist Registrar in Pediatric Dentistry, University of Leeds, Level 6/Worsley Building, Leeds, LS2 9LU, UK
| | - F Zawaideh
- School of Dentistry, Jordan University of Science and Technology, Jordan, UK
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Kayani B, Konan S, Tahmassebi J, Rowan FE, Haddad FS. An assessment of early functional rehabilitation and hospital discharge in conventional versus robotic-arm assisted unicompartmental knee arthroplasty: a prospective cohort study. Bone Joint J 2019; 101-B:24-33. [PMID: 30601042 DOI: 10.1302/0301-620x.101b1.bjj-2018-0564.r2] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [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] [Indexed: 11/05/2022]
Abstract
AIMS The objectives of this study were to compare postoperative pain, analgesia requirements, inpatient functional rehabilitation, time to hospital discharge, and complications in patients undergoing conventional jig-based unicompartmental knee arthroplasty (UKA) versus robotic-arm assisted UKA. PATIENTS AND METHODS This prospective cohort study included 146 patients with symptomatic medial compartment knee osteoarthritis undergoing primary UKA performed by a single surgeon. This included 73 consecutive patients undergoing conventional jig-based mobile bearing UKA, followed by 73 consecutive patients receiving robotic-arm assisted fixed bearing UKA. All surgical procedures were performed using the standard medial parapatellar approach for UKA, and all patients underwent the same postoperative rehabilitation programme. Postoperative pain scores on the numerical rating scale and opiate analgesia consumption were recorded until discharge. Time to attainment of predefined functional rehabilitation outcomes, hospital discharge, and postoperative complications were recorded by independent observers. RESULTS Robotic-arm assisted UKA was associated with reduced postoperative pain (p < 0.001), decreased opiate analgesia requirements (p < 0.001), shorter time to straight leg raise (p < 0.001), decreased number of physiotherapy sessions (p < 0.001), and increased maximum knee flexion at discharge (p < 0.001) compared with conventional jig-based UKA. Mean time to hospital discharge was reduced in robotic UKA compared with conventional UKA (42.5 hours (sd 5.9) vs 71.1 hours (sd 14.6), respectively; p < 0.001). There was no difference in postoperative complications between the two groups within 90 days' follow-up. CONCLUSION Robotic-arm assisted UKA was associated with decreased postoperative pain, reduced opiate analgesia requirements, improved early functional rehabilitation, and shorter time to hospital discharge compared with conventional jig-based UKA.
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Affiliation(s)
- B Kayani
- Department of Trauma and Orthopaedics, University College London Hospital, London, UK; Princess Grace Hospital, London, UK
| | - S Konan
- Department of Trauma and Orthopaedics, University College London Hospital, London, UK; Princess Grace Hospital, London, UK
| | - J Tahmassebi
- Department of Trauma and Orthopaedics, University College London Hospital, London, UK; Princess Grace Hospital, London, UK
| | - F E Rowan
- Department of Trauma and Orthopaedics, University College London Hospital, London, UK; Princess Grace Hospital, London, UK
| | - F S Haddad
- University College London Hospitals; The Princess Grace Hospital; The NIHR Biomedical Research Centre at UCLH, London, UK
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Affiliation(s)
- B. Kayani
- Department of Trauma and Orthopaedics, University College London Hospital, London, UK; Princess Grace Hospital, London, UK
| | - S. Konan
- Department of Trauma and Orthopaedics, University College London Hospital, London, UK; Princess Grace Hospital, London, UK
| | - J. Tahmassebi
- Department of Trauma and Orthopaedics, University College London Hospital, London, UK
| | - F. E. Rowan
- Department of Trauma and Orthopaedics, University College London Hospital, London, UK; Princess Grace Hospital, London, UK
| | - F. S. Haddad
- University College London Hospitals; The Princess Grace Hospital; The NIHR Biomedical Research Centre at UCLH, London, UK
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Abstract
Aims The primary aim of this study was to determine the surgical team’s learning curve for introducing robotic-arm assisted unicompartmental knee arthroplasty (UKA) into routine surgical practice. The secondary objective was to compare accuracy of implant positioning in conventional jig-based UKA versus robotic-arm assisted UKA. Patients and Methods This prospective single-surgeon cohort study included 60 consecutive conventional jig-based UKAs compared with 60 consecutive robotic-arm assisted UKAs for medial compartment knee osteoarthritis. Patients undergoing conventional UKA and robotic-arm assisted UKA were well-matched for baseline characteristics including a mean age of 65.5 years (sd 6.8) vs 64.1 years (sd 8.7), (p = 0.31); a mean body mass index of 27.2 kg.m2 (sd 2.7) vs 28.1 kg.m2 (sd 4.5), (p = 0.25); and gender (27 males: 33 females vs 26 males: 34 females, p = 0.85). Surrogate measures of the learning curve were prospectively collected. These included operative times, the Spielberger State-Trait Anxiety Inventory (STAI) questionnaire to assess preoperative stress levels amongst the surgical team, accuracy of implant positioning, limb alignment, and postoperative complications. Results Robotic-arm assisted UKA was associated with a learning curve of six cases for operating time (p < 0.001) and surgical team confidence levels (p < 0.001). Cumulative robotic experience did not affect accuracy of implant positioning (p = 0.52), posterior condylar offset ratio (p = 0.71), posterior tibial slope (p = 0.68), native joint line preservation (p = 0.55), and postoperative limb alignment (p = 0.65). Robotic-arm assisted UKA improved accuracy of femoral (p < 0.001) and tibial (p < 0.001) implant positioning with no additional risk of postoperative complications compared to conventional jig-based UKA. Conclusion Robotic-arm assisted UKA was associated with a learning curve of six cases for operating time and surgical team confidence levels but no learning curve for accuracy of implant positioning. Cite this article: Bone Joint J 2018;100-B:1033–42.
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Affiliation(s)
- B. Kayani
- Department of Trauma and Orthopaedics,
University College Hospital, London, UK and Princess Grace Hospital, London, UK
| | - S. Konan
- Department of Trauma and Orthopaedics,
University College Hospital and Princess Grace Hospital, London, UK
| | - J. R. T. Pietrzak
- Department of Trauma and Orthopaedics,
University College Hospital and Princess Grace Hospital, London, UK
| | - S. S. Huq
- Department of Trauma and Orthopaedics,
University College Hospital and Princess Grace Hospital, London, UK
| | - J. Tahmassebi
- Department of Trauma and Orthopaedics,
University College Hospital, London, UK and Princess Grace Hospital, London, UK
| | - F. S. Haddad
- University College London Hospitals, The
Princess Grace Hospital, and The NIHR Biomedical Research Centre
at UCLH, London, UK
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Kayani B, Konan S, Tahmassebi J, Pietrzak JRT, Haddad FS. Robotic-arm assisted total knee arthroplasty is associated with improved early functional recovery and reduced time to hospital discharge compared with conventional jig-based total knee arthroplasty: a prospective cohort study. Bone Joint J 2018; 100-B:930-937. [PMID: 29954217 PMCID: PMC6413767 DOI: 10.1302/0301-620x.100b7.bjj-2017-1449.r1] [Citation(s) in RCA: 201] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Aims The objective of this study was to compare early postoperative
functional outcomes and time to hospital discharge between conventional
jig-based total knee arthroplasty (TKA) and robotic-arm assisted
TKA. Patients and Methods This prospective cohort study included 40 consecutive patients
undergoing conventional jig-based TKA followed by 40 consecutive
patients receiving robotic-arm assisted TKA. All surgical procedures
were performed by a single surgeon using the medial parapatellar
approach with identical implant designs and standardized postoperative inpatient
rehabilitation. Inpatient functional outcomes and time to hospital
discharge were collected in all study patients. Results There were no systematic differences in baseline characteristics
between the conventional jig-based TKA and robotic-arm assisted
TKA treatment groups with respect to age (p = 0.32), gender (p =
0.50), body mass index (p = 0.17), American Society of Anesthesiologists
score (p = 0.88), and preoperative haemoglobin level (p = 0.82). Robotic-arm
assisted TKA was associated with reduced postoperative pain (p <
0.001), decreased analgesia requirements (p < 0.001), decreased
reduction in postoperative haemoglobin levels (p < 0.001), shorter
time to straight leg raise (p < 0.001), decreased number of physiotherapy
sessions (p < 0.001) and improved maximum knee flexion at discharge
(p < 0.001) compared with conventional jig-based TKA. Median
time to hospital discharge in robotic-arm assisted TKA was 77 hours
(interquartile range (IQR) 74 to 81) compared with 105 hours (IQR
98 to 126) in conventional jig-based TKA (p < 0.001). Conclusion Robotic-arm assisted TKA was associated with decreased pain,
improved early functional recovery and reduced time to hospital
discharge compared with conventional jig-based TKA. Cite this article: Bone Joint J 2018;100-B:930–7.
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Affiliation(s)
- B Kayani
- University College London Hospitals and Princess Grace Hospital, London, UK
| | - S Konan
- University College London Hospitals and Princess Grace Hospital, London, UK
| | | | - J R T Pietrzak
- University College London Hospitals and Princess Grace Hospital, London, UK
| | - F S Haddad
- University College London Hospitals, The Princess Grace Hospital, and The NIHR Biomedical Research Centre at UCLH, London, UK
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Benjamin B, Pietrzak JRT, Tahmassebi J, Haddad FS. A functional comparison of medial pivot and condylar knee designs based on patient outcomes and parameters of gait. Bone Joint J 2018; 100-B:76-82. [PMID: 29292344 PMCID: PMC6424433 DOI: 10.1302/0301-620x.100b1.bjj-2017-0605.r1] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2017] [Accepted: 07/07/2017] [Indexed: 02/05/2023]
Abstract
Aims The outcome of total knee arthroplasty (TKA) is not always satisfactory.
The purpose of this study was to identify satisfaction and biomechanical
features characterising the gait of patients who had undergone TKA
with either an anatomical single radius design or a medial pivot
design. We hypothesised that the latter would provide superior function. Patients and Methods This is a study of a subset of patients recruited into a prospective
randomised study of a single radius design versus a
medial pivot design, with a minimum follow-up of one year. Outcome
measurements included clinical scores (Knee Society Score (KSS)
and Oxford Knee Score (OKS)) and gait analysis using an instrumented
treadmill. Results There was no statistically significant difference between the
two groups for both the KSS and OKS. There was also no statistical
significance in cadence, walking speed, stride length and stance
time, peak stride, mid support and push-off forces. Conclusion This study corroborates a previous study by the same authors
that showed equally good results in clinical outcome and gait between
the conventional single radius and medial pivot designs under stringent
testing conditions. Cite this article: Bone Joint J 2018;(1 Supple
A)100-B:76–82.
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Affiliation(s)
- B Benjamin
- University College London Hospitals, 235 Euston Road, NW1 2BU, London, UK
| | - J R T Pietrzak
- University College London Hospitals, 235 Euston Road, NW1 2BU, London, UK
| | - J Tahmassebi
- University College London Hospitals, 235 Euston Road, NW1 2BU, London, UK
| | - F S Haddad
- University College London Hospitals, 235 Euston Road, London, NW1 2BU, UK and NIHR University College London Hospitals Biomedical Research Centre, UK
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Jansen JA, Tahmassebi J, Haddad FS. Vitamin D Deficiency Is Associated With Longer Hospital Stay And Lower Functional outcome After Total Knee Arthroplasty. Acta Orthop Belg 2017; 83:664-670. [PMID: 30423676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
High vitamin D deficiency prevalence has been found in hip and knee osteoarthritis, and a correlation between low vitamin D levels and worse functional outcome after hip arthroplasty was published before. Our goal was to examine the relation between vitamin D levels and outcome after knee arthroplasty on short and long term. In 138 patients with knee replacements preoperative vitamin D levels were recorded. 33 patients were vitamin D deficient (median 32 nmol/l, range 6-40 nmol/l) and 105 patients were vitamin D sufficient (median 65 nmol/l, range 41-177 nmol/l). After correction for confounders, vitamin D deficient patients had significant (p = 0.03) longer hospital stay (+1.0 day, range 0.2-1.6 day), and significant (p = 0.04) worse functional outcome also at long term follow up after eight years (WOMAC : +5.0, range 0.2-9.8). More research is needed to evaluate if rehabilitation and postoperative outcome can be improved by preoperative vitamin D suppletion.
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Haddad FS, Konan S, Tahmassebi J. A prospective comparative study of cementless total hip arthroplasty and hip resurfacing in patients under the age of 55 years: a ten-year follow-up. Bone Joint J 2015; 97-B:617-22. [PMID: 25922454 DOI: 10.1302/0301-620x.97b5.34537] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [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] [Indexed: 11/05/2022]
Abstract
The aim of this study was to evaluate the ten-year clinical and functional outcome of hip resurfacing and to compare it with that of cementless hip arthroplasty in patients under the age of 55 years. Between 1999 and 2002, 80 patients were enrolled into the study: 24 were randomised (11 to hip resurfacing, 13 to total hip arthroplasty), 18 refused hip resurfacing and chose cementless total hip arthroplasty with a 32 mm bearing, and 38 insisted on resurfacing. The mean follow-up for all patients was 12.1 years (10 to 14). Patients were assessed clinically and radiologically at one year, five years and ten years. Outcome measures included EuroQol EQ5D, Oxford, Harris hip, University of California Los Angeles and University College Hospital functional scores. No differences were seen between the two groups in the Oxford or Harris hip scores or in the quality of life scores. Despite a similar aspiration to activity pre-operatively, a higher proportion of patients with a hip resurfacing were running and involved in sport and heavy manual labour after ten years. We found significantly higher function scores in patients who had undergone hip resurfacing than in those with a cementless hip arthroplasty at ten years. This suggests a functional advantage for hip resurfacing. There were no other attendant problems.
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Affiliation(s)
- F S Haddad
- University College London Hospitals, 235 Euston Road, London, NW1 2BU, UK
| | - S Konan
- University College London, 250 Euston Road, London, NW1 2BU, UK
| | - J Tahmassebi
- University College London, 250 Euston Road, London, NW1 2BU, UK
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Jassim SS, Patel S, Wardle N, Tahmassebi J, Middleton R, Shardlow DL, Stephen A, Hutchinson J, Haddad FS. Five-year comparison of wear using oxidised zirconium and cobalt–chrome femoral heads in total hip arthroplasty. Bone Joint J 2015; 97-B:883-9. [DOI: 10.1302/0301-620x.97b7.35285] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Oxidised zirconium (OxZi) has been developed as an alternative bearing surface for femoral heads in total hip arthroplasty (THA). This study has investigated polyethylene wear, functional outcomes and complications, comparing OxZi and cobalt–chrome (CoCr) as part of a three-arm, multicentre randomised controlled trial. Patients undergoing THA from four institutions were prospectively randomised into three groups. Group A received a CoCr femoral head and highly cross-linked polyethylene (XLPE) liner; Group B received an OxZi femoral head and XLPE liner; Group C received an OxZi femoral head and ultra-high molecular weight polyethylene (UHMWPE) liner. At five years, 368 patients had no statistically significant differences in short-form-36 (p = 0.176 mental, p = 0.756 physical), Western Ontario and McMaster Universities Osteoarthritis Index (p = 0.847), pain scores (p = 0.458) or complications. The mean rate of linear wear was 0.028 mm/year (standard deviation (sd) 0.010) for Group A, 0.023 mm/year (sd 0.010) for Group B, and 0.09 mm/year (sd 0.045) for Group C. Penetration was significantly higher in the UHMWPE liner group compared with both XLPE liner groups (p < 0.001) but no significant difference was noted between CoCr and OxZi when articulating with XLPE (p = 0.153). In this, the largest randomised study of this bearing surface, it appears that using a XLPE acetabular liner is more important in reducing THA component wear than the choice of femoral head bearing, at mid-term follow-up. There is a non-significant trend towards lower wear, coupling OxZi rather than CoCr with XLPE but long-term analysis is required to see if this observation changes with time and becomes significant. Cite this article: Bone Joint J 2015;97-B:883–9.
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Affiliation(s)
- S. S. Jassim
- Royal National Orthopaedic Hospital, Brockley
Hill, Stanmore HA7 4LP, UK
| | - S. Patel
- University College London Hospitals, 235
Euston Road, London NW1 2BU, UK
| | - N. Wardle
- Colchester Hospital University Foundation
Trust, Turner Road, Colchester
CO4 5JL, UK
| | - J. Tahmassebi
- Trauma and Orthopaedics , Ground
Floor Central, 250 Euston Road, London
NW1 2PG, UK
| | | | - D. L. Shardlow
- Yeovil District Hospital NHSFT, Higher
Kingston, Yeovil BA21 4AT, UK
| | - A. Stephen
- Royal Derby Hospital, Uttoxeter
New Road, Derby DE22 3NE, UK
| | - J. Hutchinson
- Royal Derby Hospital, Uttoxeter
New Road, Derby DE22 3NE, UK
| | - F. S. Haddad
- University College London Hospitals, 235
Euston Road, London NW1 2BU, UK
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Tahmassebi J. Primary dentition. Br Dent J 2004; 196:311-2; author reply 312. [PMID: 15044972 DOI: 10.1038/sj.bdj.4811091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Tahmassebi J, Duggal MS, Curzon ME. Effect of a calcium carbonate-based toothpaste with 0.3% triclosan on pH changes in dental plaque in vivo. Caries Res 1994; 28:272-6. [PMID: 8069884 DOI: 10.1159/000261985] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The effects of a calcium carbonate-based toothpaste with added 0.3% triclosan on the pH of human dental plaque after a cariogenic challenge with 10% sucrose solution was investigated against a calcium carbonate-based toothpaste without triclosan and an alumina-based toothpaste. A silica-based toothpaste served as a control. Twenty adult volunteers were included in this study. The results showed that the plaque pH drop and the area under the curve for both calcium carbonate-based toothpastes, with and without 0.3% triclosan, were significantly less as compared with the alumina-based toothpaste, with both parameters being least for the toothpaste with added 0.3% triclosan. Calcium carbonate has been shown in previous studies to have a buffering effect on the plaque pH after an acidogenic challenge. The addition of 0.3% triclosan to the calcium carbonate-based toothpaste seemed to enhance this effect.
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Affiliation(s)
- J Tahmassebi
- Division of Child Dental Health, Leeds Dental Institute, University of Leeds, UK
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