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Krug R, Schwarz F, Dullin C, Leontiev W, Connert T, Krastl G, Haupt F. Removal of fiber posts using conventional versus guided endodontics: a comparative study of dentin loss and complications. Clin Oral Investig 2024; 28:192. [PMID: 38438798 PMCID: PMC10912265 DOI: 10.1007/s00784-024-05577-7] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 02/24/2024] [Indexed: 03/06/2024]
Abstract
OBJECTIVES To compare the efficacy of fiber post removal using conventional (CONV) versus guided endodontics (GE) in terms of dentin loss, residual resin material, procedural errors, and working time in vitro. MATERIAL AND METHODS Ninety human central incisors were root-filled and scanned by micro-computed tomography (CT), then restored with fiber posts and composite. Twenty-four sets of teeth with up to four human maxillary central incisors were fabricated and divided into three groups: conventional post removal by a general dentist (CG) or endodontology specialist (CS) and guided endodontics (GE) by a general dentist, yielding 30 teeth per operator and group. After treatment, the prepared access cavities were volumetrically assessed by micro-CT. Statistical significance was evaluated by one-way analysis of variance followed by post hoc comparisons with Tukey's HSD test and Pearson's chi-squared test for independence. RESULTS Both CONV and GE resulted in dentin loss and residual resin material. CS resulted in more dentin loss and less residual resin material than CG and GE (p < .05). All groups had some deviations from the original root canal but no perforations. The shortest working time was observed in the GE group. CONCLUSIONS Compared to the conventional freehand technique, GE resulted in significantly less radicular dentin loss, a few deviations but no perforations. CLINICAL RELEVANCE Guided endodontics can improve the speed and safety of fiber post removal without root perforation.
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Affiliation(s)
- R Krug
- Department of Conservative Dentistry and Periodontology and Center of Dental Traumatology, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany.
| | - F Schwarz
- Department of Conservative Dentistry and Periodontology and Center of Dental Traumatology, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - C Dullin
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
| | - W Leontiev
- Department of Periodontology, Endodontology and Cariology, University Center for Dental Medicine, University of Basel, Basel, Switzerland
| | - T Connert
- Department of Periodontology, Endodontology and Cariology, University Center for Dental Medicine, University of Basel, Basel, Switzerland
| | - G Krastl
- Department of Conservative Dentistry and Periodontology and Center of Dental Traumatology, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - F Haupt
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
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Kanzow P, Mielke K, Haupt F, Wiegand S, Schliephake H, Beutner D, Wiegand A. Oral health in patients with different sites of head and neck squamous cell carcinoma is not different. PLoS One 2023; 18:e0293665. [PMID: 37883511 PMCID: PMC10602310 DOI: 10.1371/journal.pone.0293665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 10/14/2023] [Indexed: 10/28/2023] Open
Abstract
Oral health might not only act as risk factor for head and neck squamous cell carcinoma (HNSCC), but might also have a predictive value for the patients' survival. Currently, information on the effect of oral health on survival of patients with different sites of HNSCC is lacking. This single-center retrospective study aimed to compare oral health in patients with different sites of HNSCC and to analyse whether oral health is associated with survival in the different subsets of HNSCC patients. Dental records of HNSCC patients referred for dental assessment prior to radio(chemo)therapy were included. Patient-related parameters (age at time of diagnosis, sex, tobacco exposure, alcohol consumption, HPV status), treatment data (primary treatment, intent), performance status, tumor demographics (anatomical site, TNM staging), and oral health parameters (DMFT, periodontal health, teeth with/without root canal treatment and with/without periodontitis apicalis) were obtained. Oral health parameters were compared between different anatomical sites. Survival of all HNSCC patients and of individual subsets was assessed using Kaplan-Meier statistics, and the effect of tumor demographics, patient-related parameters, and oral health on survival was analysed by cox regression analyses (α = 5%). 371 patients with HNSCC (oral: n = 86, oropharyngeal: n = 174, hypopharyngeal: n = 59, laryngeal: n = 15, other: n = 37) were included. Oral health parameters did not differ between subsets (padj.≥0.199). Five-year cumulative survival of HNSCC patients amounted to 78.6%. Only for HNSCC originating in the oral cavity and oropharynx, survival was associated with the treatment intent (p = 0.015) or performance status (p = 0.007) in the multivariable analyses, respectively. Within the limitations of this study, oral health was not different between different subsets and had no significant effect on survival of HNSCC patients.
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Affiliation(s)
- Philipp Kanzow
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
| | - Katharina Mielke
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
| | - Franziska Haupt
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
| | - Susanne Wiegand
- Department of Otolaryngology, Head and Neck Surgery, University of Leipzig, Leipzig, Germany
| | - Henning Schliephake
- Department of Oral and Maxillofacial Surgery, University Medical Center Göttingen, Göttingen, Germany
| | - Dirk Beutner
- Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center Göttingen, Göttingen, Germany
| | - Annette Wiegand
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
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Stokes C, Ahmed D, Lind N, Haupt F, Becker D, Hamilton J, Muthurangu V, von Tengg-Kobligk H, Papadakis G, Balabani S, Díaz-Zuccarini V. Aneurysmal growth in type-B aortic dissection: assessing the impact of patient-specific inlet conditions on key haemodynamic indices. J R Soc Interface 2023; 20:20230281. [PMID: 37727072 PMCID: PMC10509589 DOI: 10.1098/rsif.2023.0281] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 08/29/2023] [Indexed: 09/21/2023] Open
Abstract
Type-B aortic dissection is a cardiovascular disease in which a tear develops in the intimal layer of the descending aorta, allowing pressurized blood to delaminate the layers of the vessel wall. In medically managed patients, long-term aneurysmal dilatation of the false lumen (FL) is considered virtually inevitable and is associated with poorer disease outcomes. While the pathophysiological mechanisms driving FL dilatation are not yet understood, haemodynamic factors are believed to play a key role. Computational fluid dynamics (CFD) and 4D-flow MRI (4DMR) analyses have revealed correlations between flow helicity, oscillatory wall shear stress and aneurysmal dilatation of the FL. In this study, we compare CFD simulations using a patient-specific, three-dimensional, three-component inlet velocity profile (4D IVP) extracted from 4DMR data against simulations with flow rate-matched uniform and axial velocity profiles that remain widely used in the absence of 4DMR. We also evaluate the influence of measurement errors in 4DMR data by scaling the 4D IVP to the degree of imaging error detected in prior studies. We observe that oscillatory shear and helicity are highly sensitive to inlet velocity distribution and flow volume throughout the FL and conclude that the choice of IVP may greatly affect the future clinical value of simulations.
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Affiliation(s)
- C. Stokes
- Department of Mechanical Engineering, University College London, London, UK
- Wellcome-EPSRC Centre for Interventional Surgical Sciences, London, UK
| | - D. Ahmed
- Department of Aeronautics, Imperial College London, London, UK
| | - N. Lind
- Department of Diagnostic, Interventional and Pediatric Radiology, Inselspital, University of Bern, Bern, Switzerland
| | - F. Haupt
- Department of Diagnostic, Interventional and Pediatric Radiology, Inselspital, University of Bern, Bern, Switzerland
| | - D. Becker
- Clinic of Vascular Surgery, Inselspital, University of Bern, Bern, Switzerland
| | - J. Hamilton
- Department of Mechanical Engineering, University College London, London, UK
| | - V. Muthurangu
- Centre for Translational Cardiovascular Imaging, University College London, London, UK
| | - H. von Tengg-Kobligk
- Department of Diagnostic, Interventional and Pediatric Radiology, Inselspital, University of Bern, Bern, Switzerland
| | - G. Papadakis
- Department of Aeronautics, Imperial College London, London, UK
| | - S. Balabani
- Department of Mechanical Engineering, University College London, London, UK
- Wellcome-EPSRC Centre for Interventional Surgical Sciences, London, UK
| | - V. Díaz-Zuccarini
- Department of Mechanical Engineering, University College London, London, UK
- Wellcome-EPSRC Centre for Interventional Surgical Sciences, London, UK
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Stokes C, Haupt F, Becker D, Muthurangu V, von Tengg-Kobligk H, Balabani S, Díaz-Zuccarini V. The Influence of Minor Aortic Branches in Patient-Specific Flow Simulations of Type-B Aortic Dissection. Ann Biomed Eng 2023; 51:1627-1644. [PMID: 36967447 PMCID: PMC10264290 DOI: 10.1007/s10439-023-03175-4] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 02/19/2023] [Indexed: 03/28/2023]
Abstract
Type-B aortic dissection (TBAD) is a disease in which a tear develops in the intimal layer of the descending aorta forming a true lumen and false lumen (FL). Because disease outcomes are thought to be influenced by haemodynamic quantities such as pressure and wall shear stress (WSS), their analysis via numerical simulations may provide valuable clinical insights. Major aortic branches are routinely included in simulations but minor branches are virtually always neglected, despite being implicated in TBAD progression and the development of complications. As minor branches are estimated to carry about 7-21% of cardiac output, neglecting them may affect simulation accuracy. We present the first simulation of TBAD with all pairs of intercostal, subcostal and lumbar arteries, using 4D-flow MRI (4DMR) to inform patient-specific boundary conditions. Compared to an equivalent case without minor branches, their inclusion improved agreement with 4DMR velocities, reduced time-averaged WSS (TAWSS) and transmural pressure and elevated oscillatory shear in regions where FL dilatation and calcification were observed in vivo. Minor branch inclusion resulted in differences of 60-75% in these metrics of potential clinical relevance, indicating a need to account for minor branch flow loss if simulation accuracy is sought.
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Affiliation(s)
- C Stokes
- Department of Mechanical Engineering, University College London, London, UK
- Wellcome-EPSRC Centre for Interventional Surgical Sciences, University College London, London, UK
| | - F Haupt
- Department of Diagnostic, Interventional and Pediatric Radiology, Inselspital, University of Bern, Bern, Switzerland
| | - D Becker
- Clinic of Vascular Surgery, Inselspital, University of Bern, Bern, Switzerland
| | - V Muthurangu
- Centre for Translational Cardiovascular Imaging, University College London, London, UK
| | - H von Tengg-Kobligk
- Department of Diagnostic, Interventional and Pediatric Radiology, Inselspital, University of Bern, Bern, Switzerland
| | - S Balabani
- Department of Mechanical Engineering, University College London, London, UK
- Wellcome-EPSRC Centre for Interventional Surgical Sciences, University College London, London, UK
| | - V Díaz-Zuccarini
- Department of Mechanical Engineering, University College London, London, UK.
- Wellcome-EPSRC Centre for Interventional Surgical Sciences, University College London, London, UK.
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Haupt F, Wiegand A, Kanzow P. Risk factors for and clinical presentations indicative of vertical root fracture in endodontically treated teeth - a systematic review and meta-analysis. J Endod 2023:S0099-2399(23)00323-0. [PMID: 37307871 DOI: 10.1016/j.joen.2023.06.004] [Citation(s) in RCA: 1] [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: 03/29/2023] [Revised: 05/31/2023] [Accepted: 06/05/2023] [Indexed: 06/14/2023]
Abstract
INTRODUCTION The aim of this study was to identify specific clinical signs or symptoms and potential risk factors which are most likely associated with the presence of a vertical root fracture (VRF) in endodontically treated teeth (ETT). METHODS Electronic databases (MEDLINE via PubMed, EMBASE via Ovid, Scopus, and Web of Science) were searched by two reviewers in October 2022 for clinical studies, in which at least either the clinical presentation or potential risk factors associated with a VRF were assessed. Risk of bias was assessed using the Newcastle-Ottawa scale. Meta-analyses of odds ratios (ORs) were performed separately for several signs or symptoms and risk factors. RESULTS Fourteen sources reporting on 2,875 teeth (489 with VRF and 2,388 without VRF) were included in the meta-analyses. Regarding the clinical presentation, the presence of sinus tracts (OR=4.87; 95%-CI: 1.58-15.0), increased periodontal probing depths (OR=13.24; 95%-CI: 5.44-32.22), swelling/abscess (OR=2.86; 95%-CI: 1.74-4.70), and tenderness to percussion (OR=1.74; 95% CI: 1.18-2.61) were significantly associated with the presence of a VRF (Padj. value<.05). None of the assessed risk factors (sex, type of teeth, tooth location, posts, indirect restoration, apical extension of the root canal filling), were found to be significantly associated with the presence of a VRF (Padj. value>.05). CONCLUSIONS Four clinical presentations were identified to be the most significant signs or symptoms for a VRF in ETT: presence of sinus tracts, increased probing depths, swelling/abscess, tenderness to percussion. None of the assessed risk factors pointed out to be significantly associated with a VRF. REGISTRATION CRD42022354108 (PROSPERO).
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Affiliation(s)
- Franziska Haupt
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Germany.
| | - Annette Wiegand
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Germany
| | - Philipp Kanzow
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Germany
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Rödig T, Westbomke V, Haupt F, Münster M, Baxter S. Effect of preparation size on the removal of accumulated hard-tissue debris from the mesial root canal system of mandibular molars using SWEEPS technology. Clin Oral Investig 2023; 27:2787-2796. [PMID: 36642725 PMCID: PMC10264281 DOI: 10.1007/s00784-023-04862-1] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 01/06/2023] [Indexed: 01/17/2023]
Abstract
OBJECTIVES This study assessed the influence of preparation size on the efficacy of shock wave-enhanced emission photoacoustic streaming (SWEEPS) and conventional irrigation (CI) on removal of accumulated hard tissue debris (AHTD) from isthmus-containing mandibular molars using micro-computed tomographic analysis. MATERIALS AND METHODS Sixty extracted mandibular molars with two mesial canals connected by an isthmus were selected. Canals were shaped with Mtwo instruments (VDW, Munich, Germany) up to sizes 25/.06, 40/.04 or 40/.06 (n = 20), and specimens were distributed into 2 final irrigation groups (n = 10): SWEEPS and CI. Roots were scanned at a resolution of 10.5 µm before and after preparation and final irrigation. Data sets were co-registered, and the percentage reduction of AHTD calculated for each specimen was statistically compared using analysis of variance with a of 5% significance level. RESULTS The preparation size did not significantly influence the percentage reduction of AHTD (p < 0.05), whereas the final irrigation technique had a significant effect on debris removal (p < 0.05). A significant reduction of AHTD was achieved after final irrigation in all groups (p < 0.05); however, SWEEPS was associated with a significantly greater percentage reduction of debris than CI (p < 0.05). None of the specimens presented a completely clean isthmus. CONCLUSIONS Removal of AHTD was not significantly affected by the preparation size. SWEEPS was associated with significantly less debris than CI. CLINICAL RELEVANCE SWEEPS performed significantly better than CI regarding the removal of AHTD from isthmus-containing mandibular molars irrespective of the preparation size.
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Affiliation(s)
- Tina Rödig
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075, Göttingen, Germany.
| | - Valerie Westbomke
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075, Göttingen, Germany
| | - Franziska Haupt
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075, Göttingen, Germany
| | - Marc Münster
- Endopur, Clinic for Endodontology, Frankfurt, Germany
| | - Steffi Baxter
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075, Göttingen, Germany
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Haupt F, Kanzow P. Relation Between Students' Theoretical Knowledge and Practical Skills in Endodontics: Retrospective Analysis. Interact J Med Res 2023; 12:e46305. [PMID: 36994987 PMCID: PMC10155090 DOI: 10.2196/46305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/14/2023] [Accepted: 03/30/2023] [Indexed: 03/31/2023] Open
Abstract
BACKGROUND Dental undergraduate students are required to show sufficient practical skills prior to treating patients. Practical skills and the underlying theoretical knowledge are taught in preclinical courses. Usually, the learning outcome is assessed in written multiple-choice examinations (theoretical knowledge) and practical skills tests. However, students' assessment of practical skills is more time-consuming and prone to bias than objective multiple-choice examinations. OBJECTIVE This study aimed to analyze the relation between students' theoretical knowledge and practical skills in Endodontics. Furthermore, the predictive validity of theoretical knowledge assessment on students' practical skills was assessed. METHODS Examination results from all students who participated in the preclinical phantom course in Operative Dentistry (sixth semester of the undergraduate dental curriculum in Germany) between the summer-term 2015 and the summer-term 2022 were retrospectively evaluated (N=447). The effect of age, gender, previous course participation, and theoretical knowledge on students' practical skills was assessed using Pearson's correlations, Wilcoxon rank sum tests, and linear regression analysis. Subsequently, students' theoretical knowledge and practical skills were compared to identify a suitable pass-mark for students' theoretical knowledge associated with sufficient practical skills ≥60% (Fisher's exact test). RESULTS Students' theoretical knowledge was significantly associated with practical skills (Padj.=.019, r=0.13). By using the current pass-mark for the theoretical knowledge of 60%, a significant differentiation between insufficient practical skills <60% and sufficient practical skills ≥60% was achieved (P=.024). However, for the discrimination between students with sufficient and insufficient practical skills, an adapted pass-mark for the theoretical knowledge would be more appropriate. The ideal pass-mark amounted to 58% (P=.020). CONCLUSIONS Students' practical skills and theoretical knowledge are significantly correlated. By objectively measuring students' theoretical knowledge, a rough estimation of students' practical skills (ie, a differentiation between sufficient and insufficient practical skills) is possible. CLINICALTRIAL
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Affiliation(s)
- Franziska Haupt
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Robert-Koch-Str 40, Göttingen, DE
| | - Philipp Kanzow
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Robert-Koch-Str 40, Göttingen, DE
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Haupt F, Meyerdiercks C, Kanzow P, Wiegand A. Survival analysis of fragment reattachments and direct composite restorations in permanent teeth after dental traumatic injuries. Dent Traumatol 2023; 39:49-56. [PMID: 36116107 DOI: 10.1111/edt.12789] [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: 03/16/2022] [Revised: 08/23/2022] [Accepted: 08/29/2022] [Indexed: 01/14/2023]
Abstract
BACKGROUND/AIM In case of crown fractures after traumatic dental injuries, the affected teeth can be restored either with reattachment of the fractured fragment or with a direct composite restoration. So far, longevity data for reattachments and direct composite restorations with regard to different failure types (pulp necrosis and infection, restoration loss) are scarce. Therefore, the aim of this retrospective study was to evaluate the restorative and biological survival of reattached fragments and composite restorations after crown fractures in permanent teeth. MATERIAL AND METHODS Dental records of patients treated between 2000 and 2018 were retrospectively analysed regarding the restoration (reattachment or direct composite restorations) of teeth with crown fractures. Survival (no further intervention) and restorative and/or biological failure of all restored teeth were recorded. Statistical analysis was performed using Kaplan-Meier statistics, and the mean annual failure rates for two and 5 years were calculated. Furthermore, the effect of potential risk factors on survival was assessed. Log-rank tests and univariate Cox regression models (likelihood ratio tests) were used to assess the univariate effect of all variables of interest. Variables with a p-value ≤.10 were included in a multivariate Cox regression model with shared frailty (p < .05). RESULTS Overall, 164 patients with 235 teeth (uncomplicated crown fracture: N = 201, complicated crown fracture: N = 34) were included (1.6 ± 2.5 years observation time). Of these, 59 teeth were restored with reattachment of the fragment and 176 with a composite restoration. Overall, composite restorations had a significantly higher survival rate than reattachments (p = .002). The cumulative survival after 2 years was 42.9% and 65.0% for teeth treated with a reattachment (mAFR = 34.5%) and a composite restoration (mAFR = 19.3%), respectively. When differentiating between failure types, restoration failure and pulp necrosis were significantly more frequently detected in reattached crown fractures compared to composite restorations (restorative failure: p = .001; biological failure: p = .036). In the multivariate Cox regression model, the variable jaw and luxation significantly influenced the survival when the tooth was restored with a composite restoration. The survival was not influenced by the fracture type. CONCLUSIONS Restorative and biological failures were more frequently detected when the tooth was restored with a reattached fragment compared to a direct composite restoration. Both, restoration failure and pulp necrosis with infection should be considered as frequent complications after restoration of crown-fractured teeth which emphasizes the necessity of regular and short follow-up intervals throughout the first 2 years.
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Affiliation(s)
- Franziska Haupt
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Centre Göttingen, Göttingen, Germany
| | - Christopher Meyerdiercks
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Centre Göttingen, Göttingen, Germany
| | - Philipp Kanzow
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Centre Göttingen, Göttingen, Germany
| | - Annette Wiegand
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Centre Göttingen, Göttingen, Germany
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Haupt F, Dullin C, Krebs M, Hettwer-Steeger I, Kanzow P, Rödig T. Micro-CT evaluation of frozen and embalmed human cadavers on the effect of root canal preparation on microcrack formation in old dentin. PLoS One 2023; 18:e0281124. [PMID: 36716302 PMCID: PMC9886256 DOI: 10.1371/journal.pone.0281124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Accepted: 01/13/2023] [Indexed: 02/01/2023] Open
Abstract
The aim of this study was to evaluate the existence of preoperative dentinal defects among differently preserved dentoalveolar bone-blocks (frozen vs. embalmed) and to investigate the effect of varying apical forces (low: <4 N, high: 4-8 N) during root canal preparation on microcrack formation using micro-computed tomography (micro-CT). Thirteen embalmed and seven frozen bone-blocks containing 1-3 single rooted teeth were collected. The teeth were evenly divided into three groups (n = 10): FLow (frozen, <4 N), ELow (embalmed, <4 N), EHigh (embalmed, 4-8 N). After working length determination all specimens were scanned preoperatively. Root canal preparation was performed using nickel-titanium instruments sizes 25/.06 and 40/.06 (F6 SkyTaper; Komet, Lemgo, Germany). A postoperative scan was performed and image stacks were co-registered. All cross-sectional images were screened to identify the presence of dentinal defects. The results were expressed as the percentage of teeth/slices presenting dentinal defects. The statistical analyses were performed with Kruskal-Wallis-Test and Mann-Whitney-U-Test (α = 5%). Embalmed specimens presented a significantly higher percentage of slices with preoperative microcracks (p<0.05) than frozen specimens. No significant difference between groups was observed regarding the induction of microcracks (p>0.05). Root canal preparation does not induce microcracks in dentoalveolar bone-blocks from donors of old age, irrespective of the preservation method and the apically directed forces.
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Affiliation(s)
- Franziska Haupt
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
- * E-mail:
| | - Christian Dullin
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
| | - Marcel Krebs
- Department of Pathology, University Medical Center Göttingen, Göttingen, Germany
| | | | - Philipp Kanzow
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
| | - Tina Rödig
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
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Haupt F, Riggers I, Konietschke F, Rödig T. Effectiveness of different fiber post removal techniques and their influence on dentinal microcrack formation. Clin Oral Investig 2021; 26:3679-3685. [PMID: 34893941 PMCID: PMC8979865 DOI: 10.1007/s00784-021-04338-0] [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: 09/11/2021] [Accepted: 12/06/2021] [Indexed: 10/31/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the effectiveness of different fiber post removal techniques and to correlate dentinal loss with microcrack formation. MATERIALS AND METHODS Forty-five extracted single-rooted teeth were root canal treated and fiber posts were adhesively luted. Specimens were divided into three groups (n = 15) according to the removal technique: long-shaft round bur (EndoTracer #08, Komet, Lemgo, Germany), SonicFlex Endo (KaVo, Biberach, Germany), DT Post Removal Kit (VDW, Munich, Germany). Roots were scanned before post cementation and after post removal using micro-computed tomography. Dentin loss, residual luting material, working time, and the induction of microcracks were assessed. Statistical analysis was performed by using multiple contrast tests (max-t tests, α = 0.05). Correlations between parameters dentin loss/new microcracks and dentin loss/residual material were calculated using Kendall's tau. RESULTS Post removal with SonicFlex Endo resulted in the highest amount of removed dentin with significant differences to the round bur and the DT Post Removal Kit. No technique was found to completely remove the post and luting material. All techniques induced microcracks with the DT Post Removal Kit presenting the highest number of new defects. No correlation between dentin loss and new microcracks was observed. Deviations from the original root canal occurred in all groups, but no perforation was observed. CONCLUSIONS All techniques resulted in dentin loss, residual luting material, and the formation of microcracks. However, no correlation between dentin loss and the induction of microcracks was observed. CLINICAL RELEVANCE As all techniques resulted in microcrack formation and dentin loss, this study emphasizes the risk of iatrogenic damage due to post removal procedures.
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Affiliation(s)
- Franziska Haupt
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075, Göttingen, Germany.
| | - Insa Riggers
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075, Göttingen, Germany
| | - Frank Konietschke
- Charité - University Medical Center Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health, Institute of Biometry and Clinical Epidemiology, Berlin, Germany.,Berlin Institute of Health (BIH), Berlin, Germany
| | - Tina Rödig
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075, Göttingen, Germany
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11
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Haupt F, Pult JRW, Hülsmann M. Micro–computed Tomographic Evaluation of the Shaping Ability of 3 Reciprocating Single-File Nickel-Titanium Systems on Single- and Double-Curved Root Canals. J Endod 2020; 46:1130-1135. [DOI: 10.1016/j.joen.2020.05.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/06/2020] [Accepted: 05/14/2020] [Indexed: 11/27/2022]
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12
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Haupt F, Meinel M, Gunawardana A, Hülsmann M. Effectiveness of different activated irrigation techniques on debris and smear layer removal from curved root canals: a SEM evaluation. AUST ENDOD J 2019; 46:40-46. [PMID: 30907051 DOI: 10.1111/aej.12342] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [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: 03/02/2019] [Indexed: 02/01/2023]
Abstract
This study evaluates the effectiveness of different activated irrigation techniques on removal of debris and smear layer from curved root canals. Ninety mandibular molars with a root canal curvature between 20 and 40 degrees were assigned to 4 groups (n = 20): syringe irrigation (SI), passive ultrasonic activation (PUI), sonic activation with EDDY (ED) or EndoActivator (EA) and a control group. Mesiobuccal root canals were prepared to size 40, 0.04 and irrigated with NaOCl (3%) according to the respective technique. Roots were split longitudinally and subjected to scanning electron microscopic analysis. Presence of debris and smear layer was evaluated using 5-grade scoring systems with 200× and 1000× magnification, respectively. Data were analysed with nonparametric analysis for ordinal longitudinal data (α = 5%). Activation of the irrigant significantly improved smear layer removal (P < 0.05). Regarding debris, only activation with EA and ED was significantly more effective than SI (P < 0.05). No activation technique was able to eliminate debris and smear layer completely from curved root canals.
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Affiliation(s)
- Franziska Haupt
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
| | - Michael Meinel
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
| | - Asanka Gunawardana
- Department of Mathematical Sciences, University of Texas at Dallas, Richardson, TX, USA
| | - Michael Hülsmann
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
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13
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Rödig T, Krämer J, Müller C, Wiegand A, Haupt F, Rizk M. Incidence of microcracks after preparation of straight and curved root canals with three different NiTi instrumentation techniques assessed by micro-CT. AUST ENDOD J 2019; 45:394-399. [PMID: 30907062 DOI: 10.1111/aej.12339] [Citation(s) in RCA: 9] [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] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/02/2019] [Indexed: 01/31/2023]
Abstract
This study evaluated the effect of three different NiTi instrumentation techniques on the incidence of microcracks after the preparation of straight and curved root canals using micro-CT. Roots from mandibular premolars and maxillary molars (n = 66) with the same mean canal curvatures were assigned to three groups of straight and three groups of curved roots (n = 11). After preoperative micro-CT scans, root canals were prepared with Reciproc, OneShape and ProTaper Next to size 25. Specimens were scanned again, and pre- and post-operative cross-sectional images (n = 75 263) were screened to identify the presence of dentinal microcracks. Overall, microcracks were detected in 2.97% (n = 2236) of the cross-sectional images. No new dentinal microcracks were observed after root canal instrumentation of straight and curved canals with the tested NiTi systems. Instrumentation with Reciproc, OneShape and ProTaper Next did not induce the formation of dentinal microcracks irrespective of canal curvature.
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Affiliation(s)
- Tina Rödig
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
| | - Juliane Krämer
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
| | - Christine Müller
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
| | - Annette Wiegand
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
| | - Franziska Haupt
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
| | - Marta Rizk
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
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14
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Ungethüm K, Jolink M, Hippich M, Lachmann L, Haupt F, Winkler C, Hummel S, Pitchika A, Kordonouri O, Ziegler AG, Beyerlein A. Physical activity is associated with lower insulin and C-peptide during glucose challenge in children and adolescents with family background of diabetes. Diabet Med 2019; 36:366-375. [PMID: 30242901 DOI: 10.1111/dme.13819] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/19/2018] [Indexed: 01/03/2023]
Abstract
AIMS Children and adolescents with a family history of diabetes are at increased risk of overweight, but little is known about the potentially beneficial effects of physical activity on these children. The objective of this study was to investigate the association between moderate to vigorous physical activity (MVPA) and metabolic and inflammatory risks in children and adolescents with a family background of Type 1 diabetes or gestational diabetes. METHODS Valid MVPA measurements, made with accelerometers, were available from 234 participants (median age, 10.2 years) who had a first-degree relative with either Type 1 or gestational diabetes. Anthropometric and metabolic measurements were made and cytokines measured, and were correlated with MVPA measurements, with stepwise adjustment for confounding factors, in a cross-sectional analysis. RESULTS MVPA was negatively associated with insulin and C-peptide during challenge with an oral glucose tolerance test. MVPA was also significantly positively associated with the insulin sensitivity index, whereas no consistently significant associations were found between MVPA and BMI, blood pressure or cytokine levels. DISCUSSION Our findings indicate that physical activity may have beneficial effects on insulin and C-peptide metabolism in children and adolescents with a family background of diabetes, but show no evidence of a protective association with other health-related outcomes.
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Affiliation(s)
- K Ungethüm
- Institute of Diabetes Research, Helmholtz Zentrum München, Neuherberg and Forschergruppe Diabetes der Technischen Universität München, Munich
| | - M Jolink
- Institute of Diabetes Research, Helmholtz Zentrum München, Neuherberg and Forschergruppe Diabetes der Technischen Universität München, Munich
| | - M Hippich
- Institute of Diabetes Research, Helmholtz Zentrum München, Neuherberg and Forschergruppe Diabetes der Technischen Universität München, Munich
| | - L Lachmann
- Institute of Diabetes Research, Helmholtz Zentrum München, Neuherberg and Forschergruppe Diabetes der Technischen Universität München, Munich
| | - F Haupt
- Institute of Diabetes Research, Helmholtz Zentrum München, Neuherberg and Forschergruppe Diabetes der Technischen Universität München, Munich
| | - C Winkler
- Institute of Diabetes Research, Helmholtz Zentrum München, Neuherberg and Forschergruppe Diabetes der Technischen Universität München, Munich
- Forschergruppe Diabetes e.V. am Helmholtz Zentrum München, Neuherberg
| | - S Hummel
- Institute of Diabetes Research, Helmholtz Zentrum München, Neuherberg and Forschergruppe Diabetes der Technischen Universität München, Munich
- Forschergruppe Diabetes e.V. am Helmholtz Zentrum München, Neuherberg
| | - A Pitchika
- Institute of Diabetes Research, Helmholtz Zentrum München, Neuherberg and Forschergruppe Diabetes der Technischen Universität München, Munich
| | - O Kordonouri
- Kinder- und Jugendkrankenhaus AUF DER BULT, Hannover, Germany
| | - A-G Ziegler
- Institute of Diabetes Research, Helmholtz Zentrum München, Neuherberg and Forschergruppe Diabetes der Technischen Universität München, Munich
- Forschergruppe Diabetes e.V. am Helmholtz Zentrum München, Neuherberg
| | - A Beyerlein
- Institute of Diabetes Research, Helmholtz Zentrum München, Neuherberg and Forschergruppe Diabetes der Technischen Universität München, Munich
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15
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Haupt F, Seidel M, Rizk M, Sydow HG, Wiegand A, Rödig T. Diameter and Taper Variability of Single-file Instrumentation Systems and Their Corresponding Gutta-percha Cones. J Endod 2018; 44:1436-1441. [PMID: 30078573 DOI: 10.1016/j.joen.2018.06.005] [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] [Received: 02/28/2018] [Revised: 06/05/2018] [Accepted: 06/07/2018] [Indexed: 10/28/2022]
Abstract
INTRODUCTION Manufacturers offer single-file instrumentation systems with matching gutta-percha (GP) cones to simplify root canal preparation and obturation. The purpose of this study was to determine whether file diameters and tapers match with corresponding cone diameters and tapers (precision) as well as industry standards (accuracy). METHODS Twenty files and corresponding GP cones from each size of F360 (#25, #35, #45, #55 with .04 taper) and Reciproc (#25, #40, #50 with variable tapers) instruments were examined by using optical microscopy (×32) to determine their diameter and taper. Precision was evaluated by using one-way analysis of variance (α = 0.05) with Scheffé post hoc tests and t tests with Bonferroni correction. Accuracy was calculated by subtracting the nominal values from the measured values of all files and GP cones, and mean diameter and taper differences were compared by using one-way analysis of variance (α = 0.05) and Scheffé post hoc test for pairwise comparison. RESULTS For F360, the majority of file and cone diameters were within the tolerance levels, but most of the file diameters were significantly larger than GP cone diameters (P < .05), but the majority of all measured values were within the tolerance levels. For Reciproc, file and cone diameters at D1 and D3 mostly approached the nominal values. At the coronal end, file diameters #25 and #50 were significantly smaller than cone diameters (P < .05). For both instrumentation systems, almost all file and cone tapers matched with the preset tolerance ranges. For Reciproc, significant differences between file and GP cone demonstrated either smaller cone or smaller file diameters and tapers, depending on the size. Most of the measured values were within the acceptable range, but diameters at the coronal end exhibited the highest percent difference from the nominal values. CONCLUSIONS Despite the call for standardization, variability in diameter and taper dimensions between single-file instrumentation systems and their corresponding GP cones can be expected.
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Affiliation(s)
- Franziska Haupt
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center, Göttingen, Germany.
| | - Miriam Seidel
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center, Göttingen, Germany
| | - Marta Rizk
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center, Göttingen, Germany
| | - Hans-Georg Sydow
- Institute of Anatomy and Embryology, University Medical Center, Göttingen, Germany
| | - Annette Wiegand
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center, Göttingen, Germany
| | - Tina Rödig
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center, Göttingen, Germany
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16
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Böttcher I, Marquardt E, dem Berge T, Galuschka L, Müller I, Semler K, Roloff F, Christoph J, Stiller D, Aschenbach P, Haupt F, Aschemeier B, Lange K, Ziegler AG, Danne T, Kordonouri O. 1 Jahr Fr1dolin-Studie in Niedersachsen- Ergebnisse der ersten 5000 Teilnehmer. DIABETOL STOFFWECHS 2018. [DOI: 10.1055/s-0038-1641779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- I Böttcher
- Kinder- und Jugendkrankenhaus AUF DER BULT, Diabeteszentrum für Kinder und Jugendliche, Hannover, Germany
| | - E Marquardt
- Kinder- und Jugendkrankenhaus AUF DER BULT, Diabeteszentrum für Kinder und Jugendliche, Hannover, Germany
| | - T dem Berge
- Kinder- und Jugendkrankenhaus AUF DER BULT, Diabeteszentrum für Kinder und Jugendliche, Hannover, Germany
| | - L Galuschka
- Kinder- und Jugendkrankenhaus AUF DER BULT, Diabeteszentrum für Kinder und Jugendliche, Hannover, Germany
| | - I Müller
- Medizinische Hochschule Hannover, Medizinische Psychologie, Hannover, Germany
| | - K Semler
- Kinder- und Jugendkrankenhaus AUF DER BULT, Diabeteszentrum für Kinder und Jugendliche, Hannover, Germany
| | - F Roloff
- Kinder- und Jugendkrankenhaus AUF DER BULT, Diabeteszentrum für Kinder und Jugendliche, Hannover, Germany
| | - J Christoph
- Kinder- und Jugendkrankenhaus AUF DER BULT, Diabeteszentrum für Kinder und Jugendliche, Hannover, Germany
| | - D Stiller
- Kinder- und Jugendkrankenhaus AUF DER BULT, Diabeteszentrum für Kinder und Jugendliche, Hannover, Germany
| | - P Aschenbach
- Helmholtz Zentrum München, Institut für Diabetesforschung, München, Germany
| | - F Haupt
- Helmholtz Zentrum München, Institut für Diabetesforschung, München, Germany
| | - B Aschemeier
- Kinder- und Jugendkrankenhaus AUF DER BULT, Diabeteszentrum für Kinder und Jugendliche, Hannover, Germany
| | - K Lange
- Medizinische Hochschule Hannover, Medizinische Psychologie, Hannover, Germany
| | - AG Ziegler
- Helmholtz Zentrum München, Institut für Diabetesforschung, München, Germany
| | - T Danne
- Kinder- und Jugendkrankenhaus AUF DER BULT, Diabeteszentrum für Kinder und Jugendliche, Hannover, Germany
| | - O Kordonouri
- Kinder- und Jugendkrankenhaus AUF DER BULT, Diabeteszentrum für Kinder und Jugendliche, Hannover, Germany
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17
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Lange K, Achenbach P, Assfalg R, Bassy M, Bechthold-Dalla Pozza S, Böcker D, Braig S, Dietz B, Dunstheimer D, Eber S, Ermer U, Gavazzeni A, Gerstl EM, Götz M, Haupt F, Haus G, Heinrich M, Heublein A, Huhn F, Jolink M, Kick K, Knopff A, Koch C, Koch R, Kuhnle-Krahl U, Kriesen Y, Landendörfer W, Lang M, Laub O, Leipold G, Leppik KH, Müller H, Nellen-Hellmuth N, Ockert C, Raminger C, Renner C, Schulzik L, Sindichakis M, Tretter S, Warncke K, Winkler C, Zeller S, Ziegler AG, Müller I. Screening auf positive diabetes-spezifische Antikörper bei Kindern in Bayern (Fr1da-Projekt): psychische Folgen der Diagnose „früher Typ-1-Diabetes“ für Eltern. DIABETOL STOFFWECHS 2018. [DOI: 10.1055/s-0038-1641792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- K Lange
- Medizinische Hochschule Hannover, Medizinische Psychologie, Hannover, Germany
| | - P Achenbach
- Institut für Diabetesforschung, Helmholtz Zentrum München, München, Germany
| | - R Assfalg
- Institut für Diabetesforschung, Helmholtz Zentrum München, München, Germany
| | - M Bassy
- Medizinische Hochschule Hannover, Medizinische Psychologie, Hannover, Germany
| | | | - D Böcker
- Klinikum Nürnberg, Nürnberg, Germany
| | - S Braig
- Klinikum Bayreuth, Bayreuth, Germany
| | - B Dietz
- Berufsverband der Kinder- und Jugendärzte e.V. Bayern, München, Germany
| | | | - S Eber
- Berufsverband der Kinder- und Jugendärzte e.V. Bayern, München, Germany
| | - U Ermer
- Kliniken St. Elisabeth, Neuburg/Donau, Germany
| | - A Gavazzeni
- Kinderarztpraxis Bogenhausen, München, Germany
| | - EM Gerstl
- Klinikum Dritter Orden, Passau, Germany
| | - M Götz
- Berufsverband der Kinder- und Jugendärzte e.V. Bayern, Elisabethszell, Germany
| | - F Haupt
- Institut für Diabetesforschung, Helmholtz Zentrum München, München, Germany
| | - G Haus
- PaedNetz Bayern e.V., München, Germany
| | - M Heinrich
- Institut für Diabetesforschung, Helmholtz Zentrum München, München, Germany
| | - A Heublein
- Institut für Diabetesforschung, Helmholtz Zentrum München, München, Germany
| | - F Huhn
- Medizinische Hochschule Hannover, Medizinische Psychologie, Hannover, Germany
| | - M Jolink
- Institut für Diabetesforschung, Helmholtz Zentrum München, München, Germany
| | - K Kick
- Institut für Diabetesforschung, Helmholtz Zentrum München, München, Germany
| | - A Knopff
- Institut für Diabetesforschung, Helmholtz Zentrum München, München, Germany
| | - C Koch
- Institut für Diabetesforschung, Helmholtz Zentrum München, München, Germany
| | - R Koch
- Leopoldina Hospital, Schweinfurt, Germany
| | | | - Y Kriesen
- Institut für Diabetesforschung, Helmholtz Zentrum München, München, Germany
| | - W Landendörfer
- Berufsverband der Kinder- und Jugendärzte e.V. Bayern, Nürnberg, Germany
| | - M Lang
- Berufsverband der Kinder- und Jugendärzte e.V. Bayern, Augsburg, Germany
| | - O Laub
- Berufsverband der Kinder- und Jugendärzte e.V. Bayern, Rosenheim, Germany
| | - G Leipold
- Berufsverband der Kinder- und Jugendärzte e.V. Bayern, Regensburg, Germany
| | - KH Leppik
- Berufsverband der Kinder- und Jugendärzte e.V. Bayern, Erlangen, Germany
| | - H Müller
- Klinikum Kempten, Kempten, Germany
| | | | - C Ockert
- RoMed Klinikum, Rosenheim, Germany
| | - C Raminger
- Institut für Diabetesforschung, Helmholtz Zentrum München, München, Germany
| | - C Renner
- Praxis Kinder- und Jugendmedizin, Deggendorf, Germany
| | - L Schulzik
- Institut für Diabetesforschung, Helmholtz Zentrum München, München, Germany
| | | | | | - K Warncke
- Abteilung Pädiatrie, Klinikum rechts der Isar, München, Germany
| | - C Winkler
- Institut für Diabetesforschung, Helmholtz Zentrum München, München, Germany
| | - S Zeller
- Berufsverband der Kinder- und Jugendärzte e.V. Bayern, Kempten, Germany
| | - AG Ziegler
- Institut für Diabetesforschung, Helmholtz Zentrum München, München, Germany
| | - I Müller
- Medizinische Hochschule Hannover, Medizinische Psychologie, Hannover, Germany
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18
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Haupt F, Hülsmann M. Consistency of electronic measurements of endodontic working length when using multiple devices from the same manufacturer-an in vitro study. Clin Oral Investig 2018. [PMID: 29516188 DOI: 10.1007/s00784-018-2404-3] [Citation(s) in RCA: 2] [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] [Indexed: 10/17/2022]
Abstract
OBJECTIVES To assess the consistency of electronic determination of endodontic working length obtained from four identical electronic root canal length measurement devices (ERCLMD) from five different types of ERCLMD each under various in vitro conditions. MATERIALS AND METHODS Eight extracted teeth, seven single-rooted teeth, and one molar were accessed. Root length was measured and instruments were inserted and fixed with the tip placed beyond and short of the apical constriction, in roots with an artificial perforation or an open apex. Devices tested were Root ZX (Morita, Kyoto, Japan), Dentaport ZX (Morita), Apex ID (SybronEndo, Glendora, USA), ProPex II (Dentsply Maillefer, Victoria, Australia), and Raypex 6 (VDW-Antaeos, Munich, Germany). Teeth were irrigated with different solutions (NaOCl, EDTA, CHX). ERCLMDs were connected and measurements were recorded. Consistency was classified by the scores 0-4. Comparisons were carried out using the Kruskal-Wallis test (α = 0.05). For multiple testing, the level of significance was adjusted and analysis was performed using the Mann-Whitney U test. RESULTS Among the five types of ERCLMD, Apex ID and Raypex 6 showed the highest consistency. There was no statistically significant difference between the settings and conditions. Raypex 6 showed the highest consistency for measurements in case of a perforation. CONCLUSION Different devices from one type of ERCLMD show a high consistency. Nevertheless, general statements on the accuracy of one type of ERCLMD taken from studies investigating only one device per type should be drawn with caution. CLINICAL RELEVANCE The study refers to the reliability and repeatability of determination of endodontic working length by using ERCLMDs.
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Affiliation(s)
- Franziska Haupt
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075, Göttingen, Germany.
| | - M Hülsmann
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075, Göttingen, Germany
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Haupt F, Pfitzner J, Hülsmann M. A comparativein vitrostudy of different techniques for removal of fibre posts from root canals. AUST ENDOD J 2017; 44:245-250. [DOI: 10.1111/aej.12230] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2017] [Indexed: 11/30/2022]
Affiliation(s)
- Franziska Haupt
- Department of Preventive Dentistry, Periodontology and Cariology; University Medical Center Göttingen; Göttingen Germany
| | - Jana Pfitzner
- Department of Preventive Dentistry, Periodontology and Cariology; University Medical Center Göttingen; Göttingen Germany
| | - Michael Hülsmann
- Department of Preventive Dentistry, Periodontology and Cariology; University Medical Center Göttingen; Göttingen Germany
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20
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Rödig T, Müller C, Hoch M, Haupt F, Schulz X, Wiegand A, Rizk M. Moisture content of root canal dentine affects detection of microcracks using micro-computed tomography. Int Endod J 2017; 51:357-363. [DOI: 10.1111/iej.12850] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 08/24/2017] [Indexed: 01/02/2023]
Affiliation(s)
- T. Rödig
- Department of Preventive Dentistry; Periodontology and Cariology; University Medical Center Göttingen; Göttingen Germany
| | - C. Müller
- Department of Preventive Dentistry; Periodontology and Cariology; University Medical Center Göttingen; Göttingen Germany
| | - M. Hoch
- Department of Preventive Dentistry; Periodontology and Cariology; University Medical Center Göttingen; Göttingen Germany
| | - F. Haupt
- Department of Preventive Dentistry; Periodontology and Cariology; University Medical Center Göttingen; Göttingen Germany
| | - X. Schulz
- Department of Medical Statistics; University Medical Center Göttingen; Göttingen Germany
| | - A. Wiegand
- Department of Preventive Dentistry; Periodontology and Cariology; University Medical Center Göttingen; Göttingen Germany
| | - M. Rizk
- Department of Preventive Dentistry; Periodontology and Cariology; University Medical Center Göttingen; Göttingen Germany
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21
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Kick K, Assfalg R, Bechtold-Dalla Pozza S, Böcker D, Braig S, Dunstheimer D, Engelsberger I, Ermer U, Gavazzeni A, Gerstl EM, Haupt F, Knopff A, Koch R, Kuhnle-Krahl U, Lang M, Laub O, Maison N, Müller H, Nellen-Hellmuth N, Ockert C, Renner C, Schmidt SC, Sindichakis M, Tretter S, Winkler C, Warncke K, Achenbach P, Ziegler AG. Fr1da study at half time: screening for early stage type 1 diabetes in more than 50000 children aged from 2 to 5 years. DIABETOL STOFFWECHS 2017. [DOI: 10.1055/s-0037-1601588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- K Kick
- Institute of Diabetes Research, Helmholtz-Zentrum München and Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - R Assfalg
- Institute of Diabetes Research, Helmholtz-Zentrum München and Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | | | - D Böcker
- Klinikum Nürnberg, Nürnberg, Germany
| | - S Braig
- Klinikum Bayreuth, Bayreuth, Germany
| | | | - I Engelsberger
- Department of Pediatrics, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - U Ermer
- Kliniken St. Elisabeth, Neuburg/Donau, Germany
| | - A Gavazzeni
- Kinderarzt Praxis Bogenhausen, München, Germany
| | - EM Gerstl
- Klinikum Dritter Orden, Passau, Germany
| | - F Haupt
- Institute of Diabetes Research, Helmholtz-Zentrum München and Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - A Knopff
- Institute of Diabetes Research, Helmholtz-Zentrum München and Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - R Koch
- Leopoldina Hospital, Schweinfurt, Germany
| | | | - M Lang
- Berufsverband der Kinder- und Jugendärzte e.V., Landesverband Bayern, Augsburg, Germany
| | - O Laub
- PaedNetz Bayern e.V., Rosenheim, Germany
| | - N Maison
- Institute of Diabetes Research, Helmholtz-Zentrum München and Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - H Müller
- Klinikum Kempten, Kempten, Germany
| | | | - C Ockert
- RoMed Klinikum Rosenheim, Rosenheim, Germany
| | - C Renner
- Praxis für Kinder- und Jugendmedizin, Deggendorf, Germany
| | | | | | | | - C Winkler
- Institute of Diabetes Research, Helmholtz-Zentrum München and Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - K Warncke
- Institute of Diabetes Research, Helmholtz-Zentrum München and Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - P Achenbach
- Institute of Diabetes Research, Helmholtz-Zentrum München and Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - AG Ziegler
- Institute of Diabetes Research, Helmholtz-Zentrum München and Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München, München, Germany
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22
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Jolink M, Huang D, Haupt F, Winkler C, Smith M, Ziegler AG, Beyerlein A. Untersuchung der körperlichen Aktivität bei Kindern mit erhöhtem genetischen Risiko für Typ 1 Diabetes. DIABETOL STOFFWECHS 2017. [DOI: 10.1055/s-0037-1601590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- M Jolink
- Helmholtz Zentrum München, Institut für Diabetesforschung, München, Germany
| | - D Huang
- Helmholtz Zentrum München, Institut für Diabetesforschung, München, Germany
| | - F Haupt
- Helmholtz Zentrum München, Institut für Diabetesforschung, München, Germany
| | - C Winkler
- Helmholtz Zentrum München, Institut für Diabetesforschung, München, Germany
| | - M Smith
- Helmholtz Zentrum München, Institut für Epidemiologie 1, München, Germany
| | - AG Ziegler
- Helmholtz Zentrum München, Institut für Diabetesforschung, München, Germany
| | - A Beyerlein
- Helmholtz Zentrum München, Institut für Diabetesforschung, München, Germany
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23
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Winkler C, Laimighofer M, Haupt F, D'Orlando O, Jergens S, Scholz M, Krumsiek J, Achenbach P, Ziegler AG. Die Messung von Serumzytokinkonzentrationen verbessert die Stratifizierung der Progressionsrate zum klinisch manifesten Typ 1 Diabetes bei Inselautoantikörper-positiven Kindern. DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1584095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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24
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Heinrich M, Haupt F, Winkler C, Jergens S, Endesfelder D, Becker P, Antl N, Warncke K, Achenbach P, Ziegler AG. Heterogeneity of young patients with new-onset diabetes mellitus. DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1584097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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25
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Achenbach P, Winkler C, Haupt F, Beyerlein A, Ziegler AG. [Predisposition, early stages and phenotypes of type 1 diabetes]. Dtsch Med Wochenschr 2014; 139:1100-4. [PMID: 24823976 DOI: 10.1055/s-0034-1370059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- P Achenbach
- Institut für Diabetesforschung, Helmholtz Zentrum München, Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München
| | - C Winkler
- Institut für Diabetesforschung, Helmholtz Zentrum München, Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München
| | - F Haupt
- Institut für Diabetesforschung, Helmholtz Zentrum München, Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München
| | - A Beyerlein
- Institut für Diabetesforschung, Helmholtz Zentrum München, Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München
| | - A-G Ziegler
- Institut für Diabetesforschung, Helmholtz Zentrum München, Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München
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26
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D'Orlando O, Puff R, Henniger A, Krause S, Haupt F, Kühn D, Winkler C, Bonifacio E, Ziegler AG. Immune status is associated with the mode of delivery in infants at increased risk for Type 1 Diabetes. DIABETOL STOFFWECHS 2014. [DOI: 10.1055/s-0034-1374887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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27
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Weber K, Raab J, Haupt F, Aschermeier B, Wosch A, Ried C, Kordonouri O, Ziegler AG, Winkler C. Nährstoffzufuhr und Lebensmittelverzehr von 8 - 12-jährigen Teilnehmern der TEENDIAB-Studie: Haben Kinder mit erhöhtem Risiko für Typ 1 Diabetes ein verändertes Ernährungsverhalten? DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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28
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Raab J, Haupt F, Kordonouri O, Scholz M, Wosch A, Ried C, Aschemeier B, Danne T, Ziegler AG, Winkler C. Kontinuierlicher Anstieg der Insulinresistenz vor und nach dem Beginn der Pubertät - Ergebnisse bei Kindern mit einem erhöhten Typ 1 Diabetes Risiko. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Böhling J, Dang K, Winkler C, Schneider S, Haupt F, Ziegler AG, Lange K. Psychische Belastungen von Teilnehmern an der TEENDIAB-Studie und ihrer Eltern im Verlauf des ersten Studienjahres: Gesundheitsbezogene Lebensqualität, diabetesspezifische und allgemeine Ängste. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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30
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Bratke K, Haupt F, Kuepper M, Bade B, Faehndrich S, Luttmann W, Virchow JC. Decrease of cytotoxic T cells in allergic asthma correlates with total serum immunglobulin E. Allergy 2006; 61:1351-7. [PMID: 17002713 DOI: 10.1111/j.1398-9995.2006.01192.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [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: 12/16/2022]
Abstract
BACKGROUND Allergic asthma has been linked to an increase in T-helper type 2-like cytokines and T cells, but there is growing evidence for a role of lymphocyte-mediated cytotoxic mechanisms in the pathogenesis of asthma. Therefore, we investigated the cytotoxic potential of different lymphocyte subpopulations in patients with allergic asthma. METHODS Granzyme A, B, K, and perforin expression in peripheral blood lymphocytes was analyzed using flow cytometry. Soluble granzymes were measured in serum using specific enzyme-linked immunosorbent assays. RESULTS Asthmatics had significantly decreased percentages of granzyme and perforin-positive CD4 T cells compared with non-atopic controls. In patients with asthma, the granzyme B and perforin-positive subset of CD8(+) T cells and natural killer T cells, which represent more differentiated cell populations, were significantly reduced, while this was not observed in the less differentiated granzyme K(+) subsets. In addition, the serum concentrations of granzyme B were significantly reduced in patients with asthma, while granzyme K concentrations were not different. Interestingly, there was a negative correlation between granzyme A, B and perforin expression in T cell subsets as well as serum granzyme B concentrations and total serum immunglobulin E. In CD3-negative natural killer cells, no differences in granzyme or perforin expression between patients with asthma and controls were detected. CONCLUSION In allergic asthma, cytotoxic T lymphocyte subsets of a more differentiated phenotype are significantly decreased and this is correlated to serum immunglobulin E levels.
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Affiliation(s)
- K Bratke
- Department of Pneumology, University of Rostock, Rostock, Germany
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