Purpose. To compare the biocompatibility and antimicrobial effectiveness of the new Fast-Set MTA ... more Purpose. To compare the biocompatibility and antimicrobial effectiveness of the new Fast-Set MTA (FS-MTA) with ProRoot MTA (RS-MTA). Methods. The agar overlay method with neutral red dye was used. L929 mouse fibroblast cells were cultured. The liquid and oil extracts and solid test material were placed on the agar overlay, four samples for each material. Phenol was used as the positive control and cottonseed oil and MEM extracts were used as negative controls. Cytotoxicity was examined by measuring the zones of decolorization and evaluating cell lysis under an inverted microscope using the established criteria after 24 and 48 hours. The antimicrobial test was performed using the Kirby-Bauer disk-diffusion method against S. mutans, E. faecalis, F. nucleatum, P. gingivalis, and P. intermedia. The size of the zone of inhibition was measured in millimeters. Results. There was no zone of decolorization seen under or around the test materials for FS-MTA and RS-MTA at 24 and 48 hours. The ...
He is a 1982 graduate of the University of Athens in Greece and received his endodontic specialty... more He is a 1982 graduate of the University of Athens in Greece and received his endodontic specialty education in the Department of Endodontics at the same university in 1987. As an active member of several organizations, Dr. Abu-Tahun has served in many capacities such as Founding Member and President of both the Jordanian Endodontic Society and the PanArab Endodontic Society. He is currently the Chairman of the Higher Education Committee for the Jordan Medical Council and President Elect of the Asian Pacific Confederation.
He is a 1982 graduate of the University of Athens in Greece and received his endodontic specialty... more He is a 1982 graduate of the University of Athens in Greece and received his endodontic specialty education in the Department of Endodontics at the same university in 1987. As an active member of several organizations, Dr. Abu-Tahun has served in many capacities such as Founding Member and President of both the Jordanian Endodontic Society and the PanArab Endodontic Society. He is currently the Chairman of the Higher Education Committee for the Jordan Medical Council and President Elect of the Asian Pacific Confederation.
Purpose: The purpose of this study was to evaluate the cardiopulmonary effects of 2 sedation regi... more Purpose: The purpose of this study was to evaluate the cardiopulmonary effects of 2 sedation regimens during treatment: (1) oral meperidine and hydroxyzine with nitrous oxide (N 2 O); and (2) oral diazepam and hydroxyzine, submucosal meperidine, and N 2 O. Nitrous oxide was tapered to oxygen (O 2 ) only 10 minutes following submucosal meperi- dine administration. Methods: Sixty-two
Currently more than half of Electronic Health Record (EHR) projects fail. Most of these failures ... more Currently more than half of Electronic Health Record (EHR) projects fail. Most of these failures are not due to flawed technology, but rather due to the lack of systematic considerations of human issues. Among the barriers for EHR adoption, function mismatching among users, activities, and systems is a major area that has not been systematically addressed from a human-centered perspective. A theoretical framework called Functional Framework was developed for identifying and reducing functional discrepancies among users, activities, and systems. The Functional Framework is composed of three models – the User Model, the Designer Model, and the Activity Model. The User Model was developed by conducting a survey (N = 32) that identified the functions needed and desired from the user’s perspective. The Designer Model was developed by conducting a systemic review of an Electronic Dental Record (EDR) and its functions. The Activity Model was developed using an ethnographic method called sh...
This study is a systemic review of coronally positioned flap, coronally positioned flap+chemical ... more This study is a systemic review of coronally positioned flap, coronally positioned flap+chemical root surface conditioning, or coronally positioned flap+enamel matrix derivative (EMD) for the treatment of Miller class I and II gingival recession. All studies available through the Medline database by the end of October 2005 were used. Each study provided mean clinical attachment level, keratinized tissue, probing pocket depth, gingival recession depth and root coverage percentage before and after treatment with coronally positioned flap alone, coronally positioned flap+chemical root surface conditioning, or coronally positioned flap+EMD. Effectiveness was evaluated by comparing the weighted mean average in gingival recession depth, probing pocket depth, clinical attachment level, keratinized tissue and root coverage percentage achieved with the three treatments. Seven studies for the coronally positioned flap+EMD group, four studies for the coronally positioned flap+chemical root surface conditioning group, and seven studies for the coronally positioned flap group were retrieved for this weighted mean analysis. The results of clinical attachment level, gingival recession depth, and root coverage percentage in the coronally positioned flap+EMD group were statistically significantly better than the changes in the coronally positioned flap and coronally positioned flap+chemical root surface conditioning group at 6 and 12 mo (p<0.001). There was no significant difference at the 6-mo comparison among clinical attachment level, keratinized tissue, probing pocket depth, and gingival recession depth, except in the root coverage percentage for coronally positioned flap and coronally positioned flap+chemical root surface conditioning groups. The results suggest that root coverage by the coronally positioned flap and coronally positioned flap+chemical root surface conditioning procedures were unpredictable but became more predictable when the coronally positioned flap procedure was improved by the modification of adding EMD.
The purpose of this study was to measure the fluoride concentrations in ready-to-eat infant food,... more The purpose of this study was to measure the fluoride concentrations in ready-to-eat infant food, and to determine if significant differences exist among flavors and brands. One hundred fifty samples of 5 infant food flavors from an organic infant food manufacturer and the largest infant food manufacturer were compared using the Taves microdiffusion method. Total fluoride ingestion per serving was calculated based on average amounts consumed and container size of individual products. Fluoride concentrations ranged from 0.01 to 0.60 ppm (mean = 0.170 +/- 0.125 [SD] ppm) for all samples, with both the highest and lowest fluoride concentrations found in processed banana infant food (Gerber, mean = 0320 +/- 0.167 ppm; Earth's Best, mean = 0.030 +/- 0.013 ppm). Significant differences were noted when comparing the 2 infant food manufacturers for all flavors. The fluoride concentrations in ready-to-eat infant food varied among the 5 flavors tested. All infant foods tested were found to provide less fluoride than the Institute of Medicine tolerable upper daily intake. No trends in fluoride concentrations for different flavors or brands were noted. Fluoride in infant foods should be considered when determining total fluoride intake.
Graphic User Interface (GUI) is commonly considered to be superior to Text-based User Interface (... more Graphic User Interface (GUI) is commonly considered to be superior to Text-based User Interface (TUI). This study compares GUI and TUI in an electronic dental record system. Several usability analysis techniques compared the relative effectiveness of a GUI and a TUI. Expert users and novice users were evaluated in time required and steps needed to complete the task. A within-subject design was used to evaluate if the experience with either interface will affect task performance. The results show that the GUI interface was not better than the TUI for expert users. GUI interface was better for novice users. For novice users there was a learning transfer effect from TUI to GUI. This means a user interface is user-friendly or not depending on the mapping between the user interface and tasks. GUI by itself may or may not be better than TUI. Keywords Graphic User Interface (GUI), Text-based User Interface (TUI), electronic dental record.
This study assessed the association of caries, plaque accumulation, gingival health, and antiretr... more This study assessed the association of caries, plaque accumulation, gingival health, and antiretroviral therapy (AT) with oral lesion prevalence in human immunodeficiency virus (HIV)-infected Romanian children. A convenience sample of HIV-infected children who received dental care in 2 hospitals were evaluated for oral lesions, caries (dfs+DFS/total teeth present), plaque (PI, Silness and Löe), and gingival indices (GI, Löe and Silness). Oral lesions were grouped as: (1) extraoral herpetic infections; (2) parotid gland swelling; (3) oral ulcerative lesions; and (4) fungal infections. A standardized operator performed the examinations and photographed the oral lesions for confirmation. Age, gender, and use of AT were documented. Data were analyzed by logistic and multiple regression, Pearson correlation and t test (P<.05). One hundred four children (mean age=11.7 years) were evaluated. Fungal infections were associated with increased caries rate (P=.002; OR=2.5) and increased GI (...
This study compared the effectiveness of topical benzocaine 20% versus a combination of lidocaine... more This study compared the effectiveness of topical benzocaine 20% versus a combination of lidocaine, tetracaine, and phenylephrine in providing sufficient analgesia for the placement of orthodontic temporary anchorage devices (TADs). The 2 topical anesthetics were tested against each other bilaterally using a randomized, double-blind, crossover design. The agents were left in place for the amount of time prescribed by the manufacturer. The TAD was then placed, and each subject rated the degree of pain on a Heft-Parker visual analogue scale. A pulse oximeter was used to record the preoperative and postoperative pulse rates. Statistically significant differences in perceived pain (P < .05) and success rate (P < .01) between drugs were seen, but no significant difference in pulse rate change between the topical anesthetics was observed (P > .05). It was concluded that when the efficacy of topical benzocaine and of a combination product was compared as the sole anesthetic to faci...
Graphic User Interface (GUI) is commonly considered to be superior to Text-based User Interface (... more Graphic User Interface (GUI) is commonly considered to be superior to Text-based User Interface (TUI). This study compares GUI and TUI in an electronic dental record system. Several usability analysis techniques compared the relative effectiveness of a GUI and a TUI. Expert users and novice users were evaluated in time required and steps needed to complete the task. A within-subject design was used to evaluate if the experience with either interface will affect task performance. The results show that the GUI interface was not better than the TUI for expert users. GUI interface was better for novice users. For novice users there was a learning transfer effect from TUI to GUI. This means a user interface is user-friendly or not depending on the mapping between the user interface and tasks. GUI by itself may or may not be better than TUI.
A work domain ontology (WDO) was developed by constructing and integrating three models inverted ... more A work domain ontology (WDO) was developed by constructing and integrating three models inverted exclamation markXuser, system, and activity models. The user model was built on results of a user need survey. The activity model was built by shadowing the workflow. The system model was developed by analyzing an Electronic Dental Records (EDR) system. The WDO reflects the objects, activities, constraints and should serve as the reference and baseline for the design and evaluation of EDR systems.
The purpose of this study was to evaluate the color of primary teeth. A Vita Easyshade intraoral ... more The purpose of this study was to evaluate the color of primary teeth. A Vita Easyshade intraoral spectrophotometer was used to determine the color of primary teeth: (1) maxillary central incisors, canines, and first molars; and (2) mandibular central incisors, canines, and first molars. A total of 604 teeth were measured. Color difference was compared to DeltaE*=2.7 (mean=50:50 replacement point). Coverage error (DeltaE*cov) was calculated. Mean L*a*b*C*ho values for primary teeth were 82.5, 0.2, 18.3, 18.4, and 89.4 respectively. The most frequently chosen shades were A1 (46%), A2 (25%), and B2 (11%). Canines had the highest lightness. Maxillary canines had the lowest a* values, whereas mandibular primary incisors had the highest a* values. Molars were the most chromatic (having the highest b* values), followed by canines and primary incisors in decreasing order. Coverage error (DeltaEcov*) of Vitapan Classical was 4.2 (+/-1.9 SD). Among primary teeth, the widest ranges, in order, ...
This project was comparing the accuracy of capturing the oral pathology diagnoses among different... more This project was comparing the accuracy of capturing the oral pathology diagnoses among different coding systems. 55 diagnoses were selected for comparison among 5 coding systems. The results of accuracy in capturing oral diagnoses are: AFIP (96.4%), followed by Read 99 (85.5%), SNOMED 98 (74.5%), ICD-9 (43.6%), and CDT-3 (14.5%). It shows that the currently used coding systems, ICD-9 and CDT-3, were inadequate, whereas the AFIP coding system captured the majority of oral diagnoses. In conclusion, the most commonly used medical and dental coding systems lack terms for the diagnosis of oral and dental conditions.
Purpose. To compare the biocompatibility and antimicrobial effectiveness of the new Fast-Set MTA ... more Purpose. To compare the biocompatibility and antimicrobial effectiveness of the new Fast-Set MTA (FS-MTA) with ProRoot MTA (RS-MTA). Methods. The agar overlay method with neutral red dye was used. L929 mouse fibroblast cells were cultured. The liquid and oil extracts and solid test material were placed on the agar overlay, four samples for each material. Phenol was used as the positive control and cottonseed oil and MEM extracts were used as negative controls. Cytotoxicity was examined by measuring the zones of decolorization and evaluating cell lysis under an inverted microscope using the established criteria after 24 and 48 hours. The antimicrobial test was performed using the Kirby-Bauer disk-diffusion method against S. mutans, E. faecalis, F. nucleatum, P. gingivalis, and P. intermedia. The size of the zone of inhibition was measured in millimeters. Results. There was no zone of decolorization seen under or around the test materials for FS-MTA and RS-MTA at 24 and 48 hours. The ...
He is a 1982 graduate of the University of Athens in Greece and received his endodontic specialty... more He is a 1982 graduate of the University of Athens in Greece and received his endodontic specialty education in the Department of Endodontics at the same university in 1987. As an active member of several organizations, Dr. Abu-Tahun has served in many capacities such as Founding Member and President of both the Jordanian Endodontic Society and the PanArab Endodontic Society. He is currently the Chairman of the Higher Education Committee for the Jordan Medical Council and President Elect of the Asian Pacific Confederation.
He is a 1982 graduate of the University of Athens in Greece and received his endodontic specialty... more He is a 1982 graduate of the University of Athens in Greece and received his endodontic specialty education in the Department of Endodontics at the same university in 1987. As an active member of several organizations, Dr. Abu-Tahun has served in many capacities such as Founding Member and President of both the Jordanian Endodontic Society and the PanArab Endodontic Society. He is currently the Chairman of the Higher Education Committee for the Jordan Medical Council and President Elect of the Asian Pacific Confederation.
Purpose: The purpose of this study was to evaluate the cardiopulmonary effects of 2 sedation regi... more Purpose: The purpose of this study was to evaluate the cardiopulmonary effects of 2 sedation regimens during treatment: (1) oral meperidine and hydroxyzine with nitrous oxide (N 2 O); and (2) oral diazepam and hydroxyzine, submucosal meperidine, and N 2 O. Nitrous oxide was tapered to oxygen (O 2 ) only 10 minutes following submucosal meperi- dine administration. Methods: Sixty-two
Currently more than half of Electronic Health Record (EHR) projects fail. Most of these failures ... more Currently more than half of Electronic Health Record (EHR) projects fail. Most of these failures are not due to flawed technology, but rather due to the lack of systematic considerations of human issues. Among the barriers for EHR adoption, function mismatching among users, activities, and systems is a major area that has not been systematically addressed from a human-centered perspective. A theoretical framework called Functional Framework was developed for identifying and reducing functional discrepancies among users, activities, and systems. The Functional Framework is composed of three models – the User Model, the Designer Model, and the Activity Model. The User Model was developed by conducting a survey (N = 32) that identified the functions needed and desired from the user’s perspective. The Designer Model was developed by conducting a systemic review of an Electronic Dental Record (EDR) and its functions. The Activity Model was developed using an ethnographic method called sh...
This study is a systemic review of coronally positioned flap, coronally positioned flap+chemical ... more This study is a systemic review of coronally positioned flap, coronally positioned flap+chemical root surface conditioning, or coronally positioned flap+enamel matrix derivative (EMD) for the treatment of Miller class I and II gingival recession. All studies available through the Medline database by the end of October 2005 were used. Each study provided mean clinical attachment level, keratinized tissue, probing pocket depth, gingival recession depth and root coverage percentage before and after treatment with coronally positioned flap alone, coronally positioned flap+chemical root surface conditioning, or coronally positioned flap+EMD. Effectiveness was evaluated by comparing the weighted mean average in gingival recession depth, probing pocket depth, clinical attachment level, keratinized tissue and root coverage percentage achieved with the three treatments. Seven studies for the coronally positioned flap+EMD group, four studies for the coronally positioned flap+chemical root surface conditioning group, and seven studies for the coronally positioned flap group were retrieved for this weighted mean analysis. The results of clinical attachment level, gingival recession depth, and root coverage percentage in the coronally positioned flap+EMD group were statistically significantly better than the changes in the coronally positioned flap and coronally positioned flap+chemical root surface conditioning group at 6 and 12 mo (p&amp;amp;lt;0.001). There was no significant difference at the 6-mo comparison among clinical attachment level, keratinized tissue, probing pocket depth, and gingival recession depth, except in the root coverage percentage for coronally positioned flap and coronally positioned flap+chemical root surface conditioning groups. The results suggest that root coverage by the coronally positioned flap and coronally positioned flap+chemical root surface conditioning procedures were unpredictable but became more predictable when the coronally positioned flap procedure was improved by the modification of adding EMD.
The purpose of this study was to measure the fluoride concentrations in ready-to-eat infant food,... more The purpose of this study was to measure the fluoride concentrations in ready-to-eat infant food, and to determine if significant differences exist among flavors and brands. One hundred fifty samples of 5 infant food flavors from an organic infant food manufacturer and the largest infant food manufacturer were compared using the Taves microdiffusion method. Total fluoride ingestion per serving was calculated based on average amounts consumed and container size of individual products. Fluoride concentrations ranged from 0.01 to 0.60 ppm (mean = 0.170 +/- 0.125 [SD] ppm) for all samples, with both the highest and lowest fluoride concentrations found in processed banana infant food (Gerber, mean = 0320 +/- 0.167 ppm; Earth&amp;amp;amp;amp;amp;amp;#39;s Best, mean = 0.030 +/- 0.013 ppm). Significant differences were noted when comparing the 2 infant food manufacturers for all flavors. The fluoride concentrations in ready-to-eat infant food varied among the 5 flavors tested. All infant foods tested were found to provide less fluoride than the Institute of Medicine tolerable upper daily intake. No trends in fluoride concentrations for different flavors or brands were noted. Fluoride in infant foods should be considered when determining total fluoride intake.
Graphic User Interface (GUI) is commonly considered to be superior to Text-based User Interface (... more Graphic User Interface (GUI) is commonly considered to be superior to Text-based User Interface (TUI). This study compares GUI and TUI in an electronic dental record system. Several usability analysis techniques compared the relative effectiveness of a GUI and a TUI. Expert users and novice users were evaluated in time required and steps needed to complete the task. A within-subject design was used to evaluate if the experience with either interface will affect task performance. The results show that the GUI interface was not better than the TUI for expert users. GUI interface was better for novice users. For novice users there was a learning transfer effect from TUI to GUI. This means a user interface is user-friendly or not depending on the mapping between the user interface and tasks. GUI by itself may or may not be better than TUI. Keywords Graphic User Interface (GUI), Text-based User Interface (TUI), electronic dental record.
This study assessed the association of caries, plaque accumulation, gingival health, and antiretr... more This study assessed the association of caries, plaque accumulation, gingival health, and antiretroviral therapy (AT) with oral lesion prevalence in human immunodeficiency virus (HIV)-infected Romanian children. A convenience sample of HIV-infected children who received dental care in 2 hospitals were evaluated for oral lesions, caries (dfs+DFS/total teeth present), plaque (PI, Silness and Löe), and gingival indices (GI, Löe and Silness). Oral lesions were grouped as: (1) extraoral herpetic infections; (2) parotid gland swelling; (3) oral ulcerative lesions; and (4) fungal infections. A standardized operator performed the examinations and photographed the oral lesions for confirmation. Age, gender, and use of AT were documented. Data were analyzed by logistic and multiple regression, Pearson correlation and t test (P<.05). One hundred four children (mean age=11.7 years) were evaluated. Fungal infections were associated with increased caries rate (P=.002; OR=2.5) and increased GI (...
This study compared the effectiveness of topical benzocaine 20% versus a combination of lidocaine... more This study compared the effectiveness of topical benzocaine 20% versus a combination of lidocaine, tetracaine, and phenylephrine in providing sufficient analgesia for the placement of orthodontic temporary anchorage devices (TADs). The 2 topical anesthetics were tested against each other bilaterally using a randomized, double-blind, crossover design. The agents were left in place for the amount of time prescribed by the manufacturer. The TAD was then placed, and each subject rated the degree of pain on a Heft-Parker visual analogue scale. A pulse oximeter was used to record the preoperative and postoperative pulse rates. Statistically significant differences in perceived pain (P < .05) and success rate (P < .01) between drugs were seen, but no significant difference in pulse rate change between the topical anesthetics was observed (P > .05). It was concluded that when the efficacy of topical benzocaine and of a combination product was compared as the sole anesthetic to faci...
Graphic User Interface (GUI) is commonly considered to be superior to Text-based User Interface (... more Graphic User Interface (GUI) is commonly considered to be superior to Text-based User Interface (TUI). This study compares GUI and TUI in an electronic dental record system. Several usability analysis techniques compared the relative effectiveness of a GUI and a TUI. Expert users and novice users were evaluated in time required and steps needed to complete the task. A within-subject design was used to evaluate if the experience with either interface will affect task performance. The results show that the GUI interface was not better than the TUI for expert users. GUI interface was better for novice users. For novice users there was a learning transfer effect from TUI to GUI. This means a user interface is user-friendly or not depending on the mapping between the user interface and tasks. GUI by itself may or may not be better than TUI.
A work domain ontology (WDO) was developed by constructing and integrating three models inverted ... more A work domain ontology (WDO) was developed by constructing and integrating three models inverted exclamation markXuser, system, and activity models. The user model was built on results of a user need survey. The activity model was built by shadowing the workflow. The system model was developed by analyzing an Electronic Dental Records (EDR) system. The WDO reflects the objects, activities, constraints and should serve as the reference and baseline for the design and evaluation of EDR systems.
The purpose of this study was to evaluate the color of primary teeth. A Vita Easyshade intraoral ... more The purpose of this study was to evaluate the color of primary teeth. A Vita Easyshade intraoral spectrophotometer was used to determine the color of primary teeth: (1) maxillary central incisors, canines, and first molars; and (2) mandibular central incisors, canines, and first molars. A total of 604 teeth were measured. Color difference was compared to DeltaE*=2.7 (mean=50:50 replacement point). Coverage error (DeltaE*cov) was calculated. Mean L*a*b*C*ho values for primary teeth were 82.5, 0.2, 18.3, 18.4, and 89.4 respectively. The most frequently chosen shades were A1 (46%), A2 (25%), and B2 (11%). Canines had the highest lightness. Maxillary canines had the lowest a* values, whereas mandibular primary incisors had the highest a* values. Molars were the most chromatic (having the highest b* values), followed by canines and primary incisors in decreasing order. Coverage error (DeltaEcov*) of Vitapan Classical was 4.2 (+/-1.9 SD). Among primary teeth, the widest ranges, in order, ...
This project was comparing the accuracy of capturing the oral pathology diagnoses among different... more This project was comparing the accuracy of capturing the oral pathology diagnoses among different coding systems. 55 diagnoses were selected for comparison among 5 coding systems. The results of accuracy in capturing oral diagnoses are: AFIP (96.4%), followed by Read 99 (85.5%), SNOMED 98 (74.5%), ICD-9 (43.6%), and CDT-3 (14.5%). It shows that the currently used coding systems, ICD-9 and CDT-3, were inadequate, whereas the AFIP coding system captured the majority of oral diagnoses. In conclusion, the most commonly used medical and dental coding systems lack terms for the diagnosis of oral and dental conditions.
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Papers by Jung-Wei Chen