To establish whether CT dose variation occurs in breast cancer localization procedures between ra... more To establish whether CT dose variation occurs in breast cancer localization procedures between radiation therapy (RT) centres in Ireland and to propose diagnostic reference levels (DRLs) for this procedure. Methods: All RT centres in Ireland were invited to participate in a dose audit survey, providing data on the CT dose index volume (CTDI vol), dose-length product (DLP), current-time product (mAs), tube potential, scan length, slice thickness, scanning margins, use of automated exposure control (AEC) and scanner technology for 10 patients with breast cancer who were average sized. DRLs were derived for each dose descriptor by calculation of the rounded 75th percentile of the distribution of mean doses. Results: Data were returned for 60 patients from 6 RT centres (50% response rate). Significant variation in mean CTDI vol and mean DLP was observed between centres (p , 0.0001). Mean scan lengths and mean mAs differed significantly between centres (p , 0.0001). Tube potential was 120 kV for all sequences across centres. AEC was employed in all but one centre. Proposed DRLs for breast localization are 26 mGy and 732 mGy cm for CTDI vol and DLP, respectively. Conclusion: CT dose variation occurs between centres, establishing a need for optimization. DRLs for breast cancer localization have been proposed with the potential for reduction in CT dose. Advances in knowledge: This article provides the first reported DRL for breast cancer CT localization procedure in RT and can be used as a benchmark for comparison for other RT centres.
Ziel der vorliegenden Arbeit war, Genauigkeit und Nutzen der digitalen Volumentomografie (DVT) in... more Ziel der vorliegenden Arbeit war, Genauigkeit und Nutzen der digitalen Volumentomografie (DVT) in der parodontalen Diagnostik und Therapieplanung anhand der aktuell verfügbaren Evidenz zu untersuchen. Dazu wurde eine systematische Übersichtsarbeit aus dem Jahr 2016 aktualisiert. Eingeschlossen wurden Humanstudien mit ≥ 10 Patienten, in denen Furkationsdefekte, vertikale und/oder horizontale Knochendefekte in der DVT mit klinischen, intraoperativen und/ oder zweidimensionalen radiologischen Messungen verglichen wurden. Insgesamt wurden 11 Fallserien zu Furkationsdefekten sowie 8 Fallserien zu vertikalen und/oder horizontalen Knochendefekten identifiziert. In 6 von 11 Studien bestanden Abweichungen zwischen den klinischen bzw. zweidimensionalen radiologischen Messungen von interfurkalen, vertikalen und horizontalen Knochendefekten und den Befunden in der DVT. Die intraoperativen Messungen zeigten eine hohe Übereinstimmung mit denen in der DVT bei Furkationsdefekten (80–84 %, 4 von 4 S...
Objetivos: en la bibliografia existen controversias en cuanto a la mejora de la precision diagnos... more Objetivos: en la bibliografia existen controversias en cuanto a la mejora de la precision diagnostica y la optimizacion de la planificacion del tratamiento en periodoncia mediante imagenes tridimensionales por tomografia computarizada de haz conico (TCHC). El objetivo fue identificar las mejores evidencias externas disponibles para las indicaciones de la TCHC en el diagnostico y la planificacion del tratamiento periodontal en situaciones clinicas especificas. Fuente de los datos: se ha realizado una busqueda bibliografica sistematica de los articulos publicados hasta el 2 de marzo de 2015 utilizando las bases de datos electronicas y una busqueda manual. Dos revisores realizaron la seleccion de los estudios, la recogida de los datos y la evaluacion de la validez. Se aplicaron los criterios PICO y PRISMA. A partir de la busqueda combinada, finalmente se incluyeron siete estudios. Conclusiones: las series casuisticas fueron publicadas en los anos 2009 a 2014. Cinco de las publicaciones...
Management of Dental Emergencies in Children and Adolescents, 2019
Imaging Procedures in Dentomaxillofacial Radiology Dentists are using imaging procedures of den- ... more Imaging Procedures in Dentomaxillofacial Radiology Dentists are using imaging procedures of den- tomaxillofacial radiology for diagnostic imag- ing, some of which have been developed specifically for dentistry. These are all intraoral radiographs (periapical radiographs of various sizes, bitewings and occlusal views) and all extraoral radiographs (panoramic radiographs, cranial and partial cranial views, especially cephalometric radiographs, hand radiographs, conventional tomography (used very rarely today) and cone‐beam computed tomography (CBCT)). Other imaging techniques used in medicine are also used in dentistry, such as computed tomography (in particular Dantascan; Schwarz et al., 1987a,b), magnetic resonance imaging and ultrasound. It takes a lot of training to choose from these numerous imaging procedures those that are right for the indication of the individual patient. Imaging Procedures in Children and Adolescents In dental medicine, similar emergency situa- tions can gen...
Ziel der vorliegenden Arbeit war, Genauigkeit und Nutzen der digitalen Volumentomografie (DVT) in... more Ziel der vorliegenden Arbeit war, Genauigkeit und Nutzen der digitalen Volumentomografie (DVT) in der parodontalen Diagnostik und Therapieplanung anhand der aktuell verfügbaren Evidenz zu untersuchen. Dazu wurde eine systematische Übersichtsarbeit aus dem Jahr 2016 aktualisiert. Eingeschlossen wurden Humanstudien mit ≥ 10 Patienten, in denen Furkationsdefekte, vertikale und/oder horizontale Knochendefekte in der DVT mit klinischen, intraoperativen und/ oder zweidimensionalen radiologischen Messungen verglichen wurden. Insgesamt wurden 11 Fallserien zu Furkationsdefekten sowie 8 Fallserien zu vertikalen und/oder horizontalen Knochendefekten identifiziert. In 6 von 11 Studien bestanden Abweichungen zwischen den klinischen bzw. zweidimensionalen radiologischen Messungen von interfurkalen, vertikalen und horizontalen Knochendefekten und den Befunden in der DVT. Die intraoperativen Messungen zeigten eine hohe Übereinstimmung mit denen in der DVT bei Furkationsdefekten (80–84 %, 4 von 4 S...
t P bstract his study compared periapical (PA) radiography and one-beam tomography (CBT) for preo... more t P bstract his study compared periapical (PA) radiography and one-beam tomography (CBT) for preoperative diagnois in posterior maxillary teeth of consecutive patients eferred for possible apical surgery. Images were conurrently analyzed by an oral radiologist and an enddontist to reach consensus in interpretation of the adiographic findings. The final material included 37 remolars and 37 molars with a total of 156 roots. CBT howed significantly more lesions (34%, p 0.001) han PA radiography. Detecting lesions with PA radigraphy alone was most difficult in second molars or in oots in close proximity to the maxillary sinus floor. dditional findings were seen significantly more freuently in CBT compared with PA radiography including xpansion of lesions into the maxillary sinus (p .001), sinus membrane thickening (p 0.001), and issed canals (p 0.05). The present study highlights he advantages of using CBT for preoperative treatment lanning in maxillary posterior teeth with apical athol...
Objetivos: en la bibliografia existen controversias en cuanto a la mejora de la precision diagnos... more Objetivos: en la bibliografia existen controversias en cuanto a la mejora de la precision diagnostica y la optimizacion de la planificacion del tratamiento en periodoncia mediante imagenes tridimensionales por tomografia computarizada de haz conico (TCHC). El objetivo fue identificar las mejores evidencias externas disponibles para las indicaciones de la TCHC en el diagnostico y la planificacion del tratamiento periodontal en situaciones clinicas especificas. Fuente de los datos: se ha realizado una busqueda bibliografica sistematica de los articulos publicados hasta el 2 de marzo de 2015 utilizando las bases de datos electronicas y una busqueda manual. Dos revisores realizaron la seleccion de los estudios, la recogida de los datos y la evaluacion de la validez. Se aplicaron los criterios PICO y PRISMA. A partir de la busqueda combinada, finalmente se incluyeron siete estudios. Conclusiones: las series casuisticas fueron publicadas en los anos 2009 a 2014. Cinco de las publicaciones...
Aussagen uber das Ausmas des von diagnostischer Rontgenstrahlung ausgehenden Schadigungsrisikos f... more Aussagen uber das Ausmas des von diagnostischer Rontgenstrahlung ausgehenden Schadigungsrisikos fur Organismen resp. Teile von Organismen zu machen ist alles andere als banal. Klar ist aber: Die DVT unterscheidet sich auch im Bereich der applizierten Strahlendosis wesentlich von anderen radiologischen Techniken. Auf der einen Seite liegt ihre Dosis in aller Regel hoher als bei „einfacheren“ Methoden wie intraoralen Rontgenaufnahmen und Panoramaschichtaufnahmen, aber niedriger als bei der Computertomographie. Auf der anderen Seite sind Abweichungen von dieser Regel durch die vielfaltigen Einstellungsmoglichkeiten bei der DVT moglich und nicht einmal selten. Kleinvolumige, niedrig aufgeloste DVT-Aufnahmen eines Oberkieferseitenzahnbereiches im Low-dose-Modus sind fur Implantatabklarungen klinische Routine. Sie verursachen dann eine Patientendosis, die deutlich geringer ist als beispielsweise bei einer halbseitigen Panoramaschichtaufnahme oder sogar einem konventionellen Bitewing.
Management of Dental Emergencies in Children and Adolescents, 2019
Imaging Procedures in Dentomaxillofacial Radiology Dentists are using imaging procedures of den- ... more Imaging Procedures in Dentomaxillofacial Radiology Dentists are using imaging procedures of den- tomaxillofacial radiology for diagnostic imag- ing, some of which have been developed specifically for dentistry. These are all intraoral radiographs (periapical radiographs of various sizes, bitewings and occlusal views) and all extraoral radiographs (panoramic radiographs, cranial and partial cranial views, especially cephalometric radiographs, hand radiographs, conventional tomography (used very rarely today) and cone‐beam computed tomography (CBCT)). Other imaging techniques used in medicine are also used in dentistry, such as computed tomography (in particular Dantascan; Schwarz et al., 1987a,b), magnetic resonance imaging and ultrasound. It takes a lot of training to choose from these numerous imaging procedures those that are right for the indication of the individual patient. Imaging Procedures in Children and Adolescents In dental medicine, similar emergency situa- tions can gen...
t P bstract his study compared periapical (PA) radiography and one-beam tomography (CBT) for preo... more t P bstract his study compared periapical (PA) radiography and one-beam tomography (CBT) for preoperative diagnois in posterior maxillary teeth of consecutive patients eferred for possible apical surgery. Images were conurrently analyzed by an oral radiologist and an enddontist to reach consensus in interpretation of the adiographic findings. The final material included 37 remolars and 37 molars with a total of 156 roots. CBT howed significantly more lesions (34%, p 0.001) han PA radiography. Detecting lesions with PA radigraphy alone was most difficult in second molars or in oots in close proximity to the maxillary sinus floor. dditional findings were seen significantly more freuently in CBT compared with PA radiography including xpansion of lesions into the maxillary sinus (p .001), sinus membrane thickening (p 0.001), and issed canals (p 0.05). The present study highlights he advantages of using CBT for preoperative treatment lanning in maxillary posterior teeth with apical athol...
Objectives To update the findings of a systematic review from the year 2016 on the evidence for t... more Objectives To update the findings of a systematic review from the year 2016 on the evidence for the accuracy and potential benefits of cone beam computed tomography (CBCT) in periodontal diagnostics. Material and methods A systematic literature search was performed and the criteria for PICO, PRISMA and risk of bias assessment were applied. Only clinical trials (> 10 patients) conducted in humans on periodontal bone loss, i.e. vertical and/or horizontal or furcation involvement, in CBCT compared with clinical and/or conventional radiographic measures were included. Results From 1152 articles identified, 11 case series on furcations and eight on vertical and/or horizontal bone loss were included. The studies showed moderate risk of bias and heterogeneous study designs. The agreement between non-surgical clinical or two-dimensional radiographic assessments of horizontal, vertical or interfurcal bone loss and CBCT measurements was analysed in 11 studies and was low in six studies with comparable study designs. A high accuracy (80–84%) of CBCT measurements compared with intra-surgical findings of furcation involvement was observed in four studies. Comparing CBCT with intra-surgical measurements of vertical or horizontal bone loss, an accuracy between 58 and 93% was found in four out of six studies. Three studies were analysed and indicated benefits of CBCT in decision making and/or a reduction of treatment costs and time in teeth of interest. Conclusions The findings provide additional evidence for the accuracy of CBCT in assessing periodontal bone loss. Clinical relevance CBCT is an accurate diagnostic tool in periodontology, which needs to be carefully considered in certain situations.
Aussagen uber das Ausmas des von diagnostischer Rontgenstrahlung ausgehenden Schadigungsrisikos f... more Aussagen uber das Ausmas des von diagnostischer Rontgenstrahlung ausgehenden Schadigungsrisikos fur Organismen resp. Teile von Organismen zu machen ist alles andere als banal. Klar ist aber: Die DVT unterscheidet sich auch im Bereich der applizierten Strahlendosis wesentlich von anderen radiologischen Techniken. Auf der einen Seite liegt ihre Dosis in aller Regel hoher als bei „einfacheren“ Methoden wie intraoralen Rontgenaufnahmen und Panoramaschichtaufnahmen, aber niedriger als bei der Computertomographie. Auf der anderen Seite sind Abweichungen von dieser Regel durch die vielfaltigen Einstellungsmoglichkeiten bei der DVT moglich und nicht einmal selten. Kleinvolumige, niedrig aufgeloste DVT-Aufnahmen eines Oberkieferseitenzahnbereiches im Low-dose-Modus sind fur Implantatabklarungen klinische Routine. Sie verursachen dann eine Patientendosis, die deutlich geringer ist als beispielsweise bei einer halbseitigen Panoramaschichtaufnahme oder sogar einem konventionellen Bitewing.
The objective of the study was to compare estimates of pediatric cumulative exposure and lifetime... more The objective of the study was to compare estimates of pediatric cumulative exposure and lifetime attributable risk (LAR) of radiation-induced cancer from dental radiology between cleft palate (CP) subjects and age- and gender-matched controls (non-CP), with and without orthodontic treatment. The radiation exposure frequency of CP subjects and non-CP controls with and without orthodontic treatment was compared for two-dimensional radiography (intra-oral, panoramic and cephalometric radiography), computed tomography (CT), and cone-beam CT (CBCT) using cumulative radiation dose as an estimate. From this dose estimate, the age- and gender-dependent risk for radiation-induced stochastic effects was calculated for each patient group. CP patients received more radiographic examinations than non-CP controls, with the exception of intra-oral radiographs. The cumulative dose to CP patients was considerably higher (1963 μSv at the age of 20 years) than non-CP patients with (597 μSv) and witho...
To establish whether CT dose variation occurs in breast cancer localization procedures between ra... more To establish whether CT dose variation occurs in breast cancer localization procedures between radiation therapy (RT) centres in Ireland and to propose diagnostic reference levels (DRLs) for this procedure. Methods: All RT centres in Ireland were invited to participate in a dose audit survey, providing data on the CT dose index volume (CTDI vol), dose-length product (DLP), current-time product (mAs), tube potential, scan length, slice thickness, scanning margins, use of automated exposure control (AEC) and scanner technology for 10 patients with breast cancer who were average sized. DRLs were derived for each dose descriptor by calculation of the rounded 75th percentile of the distribution of mean doses. Results: Data were returned for 60 patients from 6 RT centres (50% response rate). Significant variation in mean CTDI vol and mean DLP was observed between centres (p , 0.0001). Mean scan lengths and mean mAs differed significantly between centres (p , 0.0001). Tube potential was 120 kV for all sequences across centres. AEC was employed in all but one centre. Proposed DRLs for breast localization are 26 mGy and 732 mGy cm for CTDI vol and DLP, respectively. Conclusion: CT dose variation occurs between centres, establishing a need for optimization. DRLs for breast cancer localization have been proposed with the potential for reduction in CT dose. Advances in knowledge: This article provides the first reported DRL for breast cancer CT localization procedure in RT and can be used as a benchmark for comparison for other RT centres.
Ziel der vorliegenden Arbeit war, Genauigkeit und Nutzen der digitalen Volumentomografie (DVT) in... more Ziel der vorliegenden Arbeit war, Genauigkeit und Nutzen der digitalen Volumentomografie (DVT) in der parodontalen Diagnostik und Therapieplanung anhand der aktuell verfügbaren Evidenz zu untersuchen. Dazu wurde eine systematische Übersichtsarbeit aus dem Jahr 2016 aktualisiert. Eingeschlossen wurden Humanstudien mit ≥ 10 Patienten, in denen Furkationsdefekte, vertikale und/oder horizontale Knochendefekte in der DVT mit klinischen, intraoperativen und/ oder zweidimensionalen radiologischen Messungen verglichen wurden. Insgesamt wurden 11 Fallserien zu Furkationsdefekten sowie 8 Fallserien zu vertikalen und/oder horizontalen Knochendefekten identifiziert. In 6 von 11 Studien bestanden Abweichungen zwischen den klinischen bzw. zweidimensionalen radiologischen Messungen von interfurkalen, vertikalen und horizontalen Knochendefekten und den Befunden in der DVT. Die intraoperativen Messungen zeigten eine hohe Übereinstimmung mit denen in der DVT bei Furkationsdefekten (80–84 %, 4 von 4 S...
Objetivos: en la bibliografia existen controversias en cuanto a la mejora de la precision diagnos... more Objetivos: en la bibliografia existen controversias en cuanto a la mejora de la precision diagnostica y la optimizacion de la planificacion del tratamiento en periodoncia mediante imagenes tridimensionales por tomografia computarizada de haz conico (TCHC). El objetivo fue identificar las mejores evidencias externas disponibles para las indicaciones de la TCHC en el diagnostico y la planificacion del tratamiento periodontal en situaciones clinicas especificas. Fuente de los datos: se ha realizado una busqueda bibliografica sistematica de los articulos publicados hasta el 2 de marzo de 2015 utilizando las bases de datos electronicas y una busqueda manual. Dos revisores realizaron la seleccion de los estudios, la recogida de los datos y la evaluacion de la validez. Se aplicaron los criterios PICO y PRISMA. A partir de la busqueda combinada, finalmente se incluyeron siete estudios. Conclusiones: las series casuisticas fueron publicadas en los anos 2009 a 2014. Cinco de las publicaciones...
Management of Dental Emergencies in Children and Adolescents, 2019
Imaging Procedures in Dentomaxillofacial Radiology Dentists are using imaging procedures of den- ... more Imaging Procedures in Dentomaxillofacial Radiology Dentists are using imaging procedures of den- tomaxillofacial radiology for diagnostic imag- ing, some of which have been developed specifically for dentistry. These are all intraoral radiographs (periapical radiographs of various sizes, bitewings and occlusal views) and all extraoral radiographs (panoramic radiographs, cranial and partial cranial views, especially cephalometric radiographs, hand radiographs, conventional tomography (used very rarely today) and cone‐beam computed tomography (CBCT)). Other imaging techniques used in medicine are also used in dentistry, such as computed tomography (in particular Dantascan; Schwarz et al., 1987a,b), magnetic resonance imaging and ultrasound. It takes a lot of training to choose from these numerous imaging procedures those that are right for the indication of the individual patient. Imaging Procedures in Children and Adolescents In dental medicine, similar emergency situa- tions can gen...
Ziel der vorliegenden Arbeit war, Genauigkeit und Nutzen der digitalen Volumentomografie (DVT) in... more Ziel der vorliegenden Arbeit war, Genauigkeit und Nutzen der digitalen Volumentomografie (DVT) in der parodontalen Diagnostik und Therapieplanung anhand der aktuell verfügbaren Evidenz zu untersuchen. Dazu wurde eine systematische Übersichtsarbeit aus dem Jahr 2016 aktualisiert. Eingeschlossen wurden Humanstudien mit ≥ 10 Patienten, in denen Furkationsdefekte, vertikale und/oder horizontale Knochendefekte in der DVT mit klinischen, intraoperativen und/ oder zweidimensionalen radiologischen Messungen verglichen wurden. Insgesamt wurden 11 Fallserien zu Furkationsdefekten sowie 8 Fallserien zu vertikalen und/oder horizontalen Knochendefekten identifiziert. In 6 von 11 Studien bestanden Abweichungen zwischen den klinischen bzw. zweidimensionalen radiologischen Messungen von interfurkalen, vertikalen und horizontalen Knochendefekten und den Befunden in der DVT. Die intraoperativen Messungen zeigten eine hohe Übereinstimmung mit denen in der DVT bei Furkationsdefekten (80–84 %, 4 von 4 S...
t P bstract his study compared periapical (PA) radiography and one-beam tomography (CBT) for preo... more t P bstract his study compared periapical (PA) radiography and one-beam tomography (CBT) for preoperative diagnois in posterior maxillary teeth of consecutive patients eferred for possible apical surgery. Images were conurrently analyzed by an oral radiologist and an enddontist to reach consensus in interpretation of the adiographic findings. The final material included 37 remolars and 37 molars with a total of 156 roots. CBT howed significantly more lesions (34%, p 0.001) han PA radiography. Detecting lesions with PA radigraphy alone was most difficult in second molars or in oots in close proximity to the maxillary sinus floor. dditional findings were seen significantly more freuently in CBT compared with PA radiography including xpansion of lesions into the maxillary sinus (p .001), sinus membrane thickening (p 0.001), and issed canals (p 0.05). The present study highlights he advantages of using CBT for preoperative treatment lanning in maxillary posterior teeth with apical athol...
Objetivos: en la bibliografia existen controversias en cuanto a la mejora de la precision diagnos... more Objetivos: en la bibliografia existen controversias en cuanto a la mejora de la precision diagnostica y la optimizacion de la planificacion del tratamiento en periodoncia mediante imagenes tridimensionales por tomografia computarizada de haz conico (TCHC). El objetivo fue identificar las mejores evidencias externas disponibles para las indicaciones de la TCHC en el diagnostico y la planificacion del tratamiento periodontal en situaciones clinicas especificas. Fuente de los datos: se ha realizado una busqueda bibliografica sistematica de los articulos publicados hasta el 2 de marzo de 2015 utilizando las bases de datos electronicas y una busqueda manual. Dos revisores realizaron la seleccion de los estudios, la recogida de los datos y la evaluacion de la validez. Se aplicaron los criterios PICO y PRISMA. A partir de la busqueda combinada, finalmente se incluyeron siete estudios. Conclusiones: las series casuisticas fueron publicadas en los anos 2009 a 2014. Cinco de las publicaciones...
Aussagen uber das Ausmas des von diagnostischer Rontgenstrahlung ausgehenden Schadigungsrisikos f... more Aussagen uber das Ausmas des von diagnostischer Rontgenstrahlung ausgehenden Schadigungsrisikos fur Organismen resp. Teile von Organismen zu machen ist alles andere als banal. Klar ist aber: Die DVT unterscheidet sich auch im Bereich der applizierten Strahlendosis wesentlich von anderen radiologischen Techniken. Auf der einen Seite liegt ihre Dosis in aller Regel hoher als bei „einfacheren“ Methoden wie intraoralen Rontgenaufnahmen und Panoramaschichtaufnahmen, aber niedriger als bei der Computertomographie. Auf der anderen Seite sind Abweichungen von dieser Regel durch die vielfaltigen Einstellungsmoglichkeiten bei der DVT moglich und nicht einmal selten. Kleinvolumige, niedrig aufgeloste DVT-Aufnahmen eines Oberkieferseitenzahnbereiches im Low-dose-Modus sind fur Implantatabklarungen klinische Routine. Sie verursachen dann eine Patientendosis, die deutlich geringer ist als beispielsweise bei einer halbseitigen Panoramaschichtaufnahme oder sogar einem konventionellen Bitewing.
Management of Dental Emergencies in Children and Adolescents, 2019
Imaging Procedures in Dentomaxillofacial Radiology Dentists are using imaging procedures of den- ... more Imaging Procedures in Dentomaxillofacial Radiology Dentists are using imaging procedures of den- tomaxillofacial radiology for diagnostic imag- ing, some of which have been developed specifically for dentistry. These are all intraoral radiographs (periapical radiographs of various sizes, bitewings and occlusal views) and all extraoral radiographs (panoramic radiographs, cranial and partial cranial views, especially cephalometric radiographs, hand radiographs, conventional tomography (used very rarely today) and cone‐beam computed tomography (CBCT)). Other imaging techniques used in medicine are also used in dentistry, such as computed tomography (in particular Dantascan; Schwarz et al., 1987a,b), magnetic resonance imaging and ultrasound. It takes a lot of training to choose from these numerous imaging procedures those that are right for the indication of the individual patient. Imaging Procedures in Children and Adolescents In dental medicine, similar emergency situa- tions can gen...
t P bstract his study compared periapical (PA) radiography and one-beam tomography (CBT) for preo... more t P bstract his study compared periapical (PA) radiography and one-beam tomography (CBT) for preoperative diagnois in posterior maxillary teeth of consecutive patients eferred for possible apical surgery. Images were conurrently analyzed by an oral radiologist and an enddontist to reach consensus in interpretation of the adiographic findings. The final material included 37 remolars and 37 molars with a total of 156 roots. CBT howed significantly more lesions (34%, p 0.001) han PA radiography. Detecting lesions with PA radigraphy alone was most difficult in second molars or in oots in close proximity to the maxillary sinus floor. dditional findings were seen significantly more freuently in CBT compared with PA radiography including xpansion of lesions into the maxillary sinus (p .001), sinus membrane thickening (p 0.001), and issed canals (p 0.05). The present study highlights he advantages of using CBT for preoperative treatment lanning in maxillary posterior teeth with apical athol...
Objectives To update the findings of a systematic review from the year 2016 on the evidence for t... more Objectives To update the findings of a systematic review from the year 2016 on the evidence for the accuracy and potential benefits of cone beam computed tomography (CBCT) in periodontal diagnostics. Material and methods A systematic literature search was performed and the criteria for PICO, PRISMA and risk of bias assessment were applied. Only clinical trials (> 10 patients) conducted in humans on periodontal bone loss, i.e. vertical and/or horizontal or furcation involvement, in CBCT compared with clinical and/or conventional radiographic measures were included. Results From 1152 articles identified, 11 case series on furcations and eight on vertical and/or horizontal bone loss were included. The studies showed moderate risk of bias and heterogeneous study designs. The agreement between non-surgical clinical or two-dimensional radiographic assessments of horizontal, vertical or interfurcal bone loss and CBCT measurements was analysed in 11 studies and was low in six studies with comparable study designs. A high accuracy (80–84%) of CBCT measurements compared with intra-surgical findings of furcation involvement was observed in four studies. Comparing CBCT with intra-surgical measurements of vertical or horizontal bone loss, an accuracy between 58 and 93% was found in four out of six studies. Three studies were analysed and indicated benefits of CBCT in decision making and/or a reduction of treatment costs and time in teeth of interest. Conclusions The findings provide additional evidence for the accuracy of CBCT in assessing periodontal bone loss. Clinical relevance CBCT is an accurate diagnostic tool in periodontology, which needs to be carefully considered in certain situations.
Aussagen uber das Ausmas des von diagnostischer Rontgenstrahlung ausgehenden Schadigungsrisikos f... more Aussagen uber das Ausmas des von diagnostischer Rontgenstrahlung ausgehenden Schadigungsrisikos fur Organismen resp. Teile von Organismen zu machen ist alles andere als banal. Klar ist aber: Die DVT unterscheidet sich auch im Bereich der applizierten Strahlendosis wesentlich von anderen radiologischen Techniken. Auf der einen Seite liegt ihre Dosis in aller Regel hoher als bei „einfacheren“ Methoden wie intraoralen Rontgenaufnahmen und Panoramaschichtaufnahmen, aber niedriger als bei der Computertomographie. Auf der anderen Seite sind Abweichungen von dieser Regel durch die vielfaltigen Einstellungsmoglichkeiten bei der DVT moglich und nicht einmal selten. Kleinvolumige, niedrig aufgeloste DVT-Aufnahmen eines Oberkieferseitenzahnbereiches im Low-dose-Modus sind fur Implantatabklarungen klinische Routine. Sie verursachen dann eine Patientendosis, die deutlich geringer ist als beispielsweise bei einer halbseitigen Panoramaschichtaufnahme oder sogar einem konventionellen Bitewing.
The objective of the study was to compare estimates of pediatric cumulative exposure and lifetime... more The objective of the study was to compare estimates of pediatric cumulative exposure and lifetime attributable risk (LAR) of radiation-induced cancer from dental radiology between cleft palate (CP) subjects and age- and gender-matched controls (non-CP), with and without orthodontic treatment. The radiation exposure frequency of CP subjects and non-CP controls with and without orthodontic treatment was compared for two-dimensional radiography (intra-oral, panoramic and cephalometric radiography), computed tomography (CT), and cone-beam CT (CBCT) using cumulative radiation dose as an estimate. From this dose estimate, the age- and gender-dependent risk for radiation-induced stochastic effects was calculated for each patient group. CP patients received more radiographic examinations than non-CP controls, with the exception of intra-oral radiographs. The cumulative dose to CP patients was considerably higher (1963 μSv at the age of 20 years) than non-CP patients with (597 μSv) and witho...
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