Objective: The purpose of this study was to assess patient satisfaction, gross fracture and margi... more Objective: The purpose of this study was to assess patient satisfaction, gross fracture and marginal adaptation of e.max press endocrowns versus e.max press crowns retained with Fiber reinforced composite post (FRCP) and core in upper anterior teeth. Material and methods: The present study included 24 patients seeking root canal treatment in anterior upper arch. The patients received root canal treatment (RCT) then they were randomly assigned into two groups (n=12). The first group received preparation for the IPS e.max crowns retained with FRCP and core and the second group received preparation for the IPS e.max endocrowns. Press technique was used for the fabrication of both restorations using IPS e.max press ingots. Marginal integrity and gross fracture were evaluated using USPHS criteria and a questionnaire was conducted to evaluate patient satisfaction. Data were analyzed using IBM SPSS Statistics for Windows, Version 23.0. Armonk, NY: IBM Corp. Results: There was no statistica...
Objective: This study was performed to evaluate the use of PEEK abutments versus zirconium abutme... more Objective: This study was performed to evaluate the use of PEEK abutments versus zirconium abutments with lithium disilicate superstructure on the esthetic acceptance and peri-implant clinical parameters. Zirconium abutments were found to have high surface roughness even after polishing. This causes a remarkable collapse of the soft tissue papilla that is a primary factor in the Pink Esthetic Score(PES), resulting in failed esthetic restoration in the anterior esthetic zone. Material and Methods: Twenty patients who needed a single implant restoration in the esthetic zone were included in this study. Eighteen patients completed screening, baseline, three-month, six-month, and twelve-month follow-up visits. At the screening visit, the patients were randomly allocated into two groups: Zirconia abutments (A) Group, and PEEK abutments (B) Group, both of which were restored with IPS e.max CAD superstructure. Patients Satisfaction was assessed by visual analogue scale (VAS). Pink estheti...
Open Access Macedonian Journal of Medical Sciences, 2020
BACKGROUND: Health-care safety focuses on improving patient’s and worker’s safety in a safe worki... more BACKGROUND: Health-care safety focuses on improving patient’s and worker’s safety in a safe working clinics’ environment and prevent infection transmission including droplet infections as seasonal influenza and novel coronavirus (COVID-19). Dental health-care personnel (DHCP) are the target of safety measures and are themselves responsible for elimination of preventable harm. Dental schools are expected to demonstrate the model for quality safe care. AIM: This study aims to achieve high-quality safe dental care at dental clinics, Faculty of Dentistry, Cairo University. METHODS: A cross-sectional survey study was conducted at two Dental Outpatient Clinics, Cairo University. Disk review of policies, observation checklists for practices and awareness questionnaires of DHCP were used. RESULTS: DHCP showed good awareness for most of infection control (IC) and X-ray safety items. However, there are no policies or procedures to control droplet infections in the clinics. The clinics were cl...
Objective: the purpose of this study was to evaluate and compare, gross fracture, patient satisfa... more Objective: the purpose of this study was to evaluate and compare, gross fracture, patient satisfaction, and marginal adaptation of anterior endocrowns restoring endodontically treated anterior teeth fabricated from IPS e.max press and CERASMART hybrid ceramics. Material and methods: A total of 24 patients were selected to receive an esthetic endocrowns for upper teeth in the esthetic zone (central incisor, lateral and canine).The 24 patients were divided into 2 groups (n=12 each), where Group (1): Control group: Teeth receiving IPS e.max press anterior endocrowns and Group (2): Intervention group: Tooth receiving CERASMART anterior endocrowns . After cementation all patients were recalled after 3, 6, 9, and 12 months. During each recall examination, USPHS criteria were adopted for clinical evaluation to score margin integrity and gross fracture. In addition, questionnaires were used to evaluate patients’ satisfaction and potential postoperative discomfort. Chi-square or Fisher’s Exa...
Statement of the Problem: The emergence of different types of scanners and competition in the mar... more Statement of the Problem: The emergence of different types of scanners and competition in the market raise a question on the
influence of these different scanners on the margin accuracy and internal fit of the CAD/CAM generated all-ceramic crowns.
Keywords: Margin Accuracy; Internal Fit; CAD/CAM; Implant-Abutment; Omnicam; Cone Beam
Material and Methods: The prefabricated titanium implant abutments used in this study were selected representing upper first
premolar. Three implant abutments were divided into 3 groups as follows: Group 1: consisted of 5 scans with the Cerec Bluecam.
Group 2: consisted of 5 scans with the Cerec Omnicam. Group 3: consisted of 5 scans with the Cerec Ineos camera. The vertical marginal
gap distance between the crown and the implant abutment was measured using stereomicroscope connected to computer and
digital camera. Measurements were made at thirty points for each surface of the crown. A rubber base replica of the space between
the crown and the implant abutments was made for each tested specimen to assess its internal fit using the stereomicroscope. The
recorded data were collected, tabulated and statistically analyzed.
Result: It was found that the mean and standard deviation values of marginal accuracy data were 130 ± 3 μm, 320 ± 3 μm and 100 ±
2 μm with Blue cam, Ineos and Omnicam, respectively. The mean and standard deviation values of internal fit data were 420 ± 21 μm,
260 ± 16 μm and 290 ± 15 μm with 3D Blue Cam, Ineos and Omnicam respectively. Result of obtained from Cone beam C.T. revealed
that the mean and standard deviation values of internal fit data were 450 ± 26 μm, 400 ± 23 μm and 360 ± 22 μm with 3D Blue Cam,
Ineos and Omnicam respectively (P-value < 0.05).
Conclusion: Within the limitations of this study, the following conclusions could be drawn: Digitizing techniques (Bluecam, Omnicam
and Ineos) had a great influence on the marginal adaptation and internal fit of all-ceramic crowns placed on implant-abutment.
Bluecam are the most appropriate digitizing technique in obtaining the best marginal adaptation compared to Ineos. Marginal accuracy
and internal fit values recorded in the tested groups lied within the range of clinical “acceptance (100 - 200) μm. Omnicam
scanner is not an appropriate digitizing technique in obtaining the best internal fit compared to bluecam and Ineos.
Background: Optical impairments of teeth in the esthetic zone constitute a problem for many denti... more Background: Optical impairments of teeth in the esthetic zone constitute a problem for many dentists and patients as several studies concluded that patients were dissatisfied of their dental appearance because of their restorations' color. The purpose of this study was to assess patient satisfaction combined with shade matching of VITA SUPRINITY versus lithium disilicate (IPS e-max CAD) all-ceramic crowns in esthetic zone. Methods: 26 patients with teeth problems indicated for full coverage restoration on one tooth in the esthetic zone (from upper central incisor to 1st premolar) were randomized into 2 equal groups (n=13) for which different CAD-CAM ceramic materials were used; (VITA SUPRINITY) a zirconia reinforced lithium silicate ceramic and (IPS e.max CAD) lithium disilicate glass ceramic. The crowns were fabricated to match the shade of the contra-lateral/ adjacent tooth and assessed using the modified USPHS criteria. Also patient satisfaction was assessed. The data obtaine...
Objective: To evaluate fracture resistance and survival rate of IPS Empress CAD versus Polished C... more Objective: To evaluate fracture resistance and survival rate of IPS Empress CAD versus Polished Celtra Duo ceramic laminate veneers. Material and Methods: Thirty-six ceramic laminate veneers were fabricated for maxillary anterior teeth. The patients were divided into two groups according to the material Group 1(control group) fabricated from IPS Empress CAD laminate veneers and group 2(intervention group) fabricated from Polished Celtra Duo laminate veneers. Standardized the same preparation with butt joint design and chamfer finish line located supra gingival were performed for all the teeth. The fabrication of the veneers was performed using Cad\Cam (Ceramill motion) machine, with software (Exocad). The veneers surfaces were treated and silanated according to the manufacture instruction of each ceramic and enamel surfaces were etched where total etch adhesive protocol was obeyed using BISCO. Follow up sessions were done every two months up to one year for each patient using dental...
Tensile Bond Strength of (PEEK) vs Lithium Disilicate Endocrown. (An Invitro study) Ahmed Riyad1,... more Tensile Bond Strength of (PEEK) vs Lithium Disilicate Endocrown. (An Invitro study) Ahmed Riyad1, Jylan Fouad El-Guindy 2 , Lamiaa Sayed Kheiralla 3 . Abstract Aim To assess the difference in tensile bond strength between (PEEK) and lithium disilicate endocrowns cemented to natural extracted teeth after thermocycling . Methodology 22 recently extracted human maxillary first molar teeth from diabetic patients ranging from 20 to 50 years old were collected from the Oral and Maxillofacial Surgical Department of Faculty of Dentistry, Cairo University. All teeth were subjected to standard endodontic treatment and mounted into resin pattern. Cavity preparation with butt joint design was made with copious water cooling using CNC special milling machine . The specimens were divided into 2 equal groups (n=11). 11 endocrowns were allocated to be constructed from lithium disilicate and others were allocated to be constructed from PEEK. All endocrowns were cemented on their corresponding teeth ...
Background: Cerasmart hybrid material offers specific advantages such as less fragility and more ... more Background: Cerasmart hybrid material offers specific advantages such as less fragility and more flexibility than glass ceramics. This material also has the option of readily modifying or repairing the surface and favorable stress-absorbing characteristics. In our study, Cerasmart hybrid and lithium disilicate ceramic laminate veneers with two different preparation designs were compared with regards to their fracture resistance. Methods: A total of 52 of comparable human central maxillary incisors were used. Group A (n=26) was made up of Cerasmart hybrid ceramic laminate veneers were fabricated from Cerasmart blocks, while Group B (n=26) was made up of lithium disilicate ceramic laminate veneers were made of IPS e.max pressable ingots. Each group was subdivided in two equal subgroups according to preparation designs. Subgroup I comprised Featheredge preparation design and subgroup II: Wraparound preparation design. All samples were subjected to thermocycling between 5°C and 55°C in ...
Objective: The purpose of this study was to assess patient satisfaction, gross fracture and margi... more Objective: The purpose of this study was to assess patient satisfaction, gross fracture and marginal adaptation of e.max press endocrowns versus e.max press crowns retained with Fiber reinforced composite post (FRCP) and core in upper anterior teeth. Material and methods: The present study included 24 patients seeking root canal treatment in anterior upper arch. The patients received root canal treatment (RCT) then they were randomly assigned into two groups (n=12). The first group received preparation for the IPS e.max crowns retained with FRCP and core and the second group received preparation for the IPS e.max endocrowns. Press technique was used for the fabrication of both restorations using IPS e.max press ingots. Marginal integrity and gross fracture were evaluated using USPHS criteria and a questionnaire was conducted to evaluate patient satisfaction. Data were analyzed using IBM SPSS Statistics for Windows, Version 23.0. Armonk, NY: IBM Corp. Results: There was no statistica...
Objective: This study was performed to evaluate the use of PEEK abutments versus zirconium abutme... more Objective: This study was performed to evaluate the use of PEEK abutments versus zirconium abutments with lithium disilicate superstructure on the esthetic acceptance and peri-implant clinical parameters. Zirconium abutments were found to have high surface roughness even after polishing. This causes a remarkable collapse of the soft tissue papilla that is a primary factor in the Pink Esthetic Score(PES), resulting in failed esthetic restoration in the anterior esthetic zone. Material and Methods: Twenty patients who needed a single implant restoration in the esthetic zone were included in this study. Eighteen patients completed screening, baseline, three-month, six-month, and twelve-month follow-up visits. At the screening visit, the patients were randomly allocated into two groups: Zirconia abutments (A) Group, and PEEK abutments (B) Group, both of which were restored with IPS e.max CAD superstructure. Patients Satisfaction was assessed by visual analogue scale (VAS). Pink estheti...
Open Access Macedonian Journal of Medical Sciences, 2020
BACKGROUND: Health-care safety focuses on improving patient’s and worker’s safety in a safe worki... more BACKGROUND: Health-care safety focuses on improving patient’s and worker’s safety in a safe working clinics’ environment and prevent infection transmission including droplet infections as seasonal influenza and novel coronavirus (COVID-19). Dental health-care personnel (DHCP) are the target of safety measures and are themselves responsible for elimination of preventable harm. Dental schools are expected to demonstrate the model for quality safe care. AIM: This study aims to achieve high-quality safe dental care at dental clinics, Faculty of Dentistry, Cairo University. METHODS: A cross-sectional survey study was conducted at two Dental Outpatient Clinics, Cairo University. Disk review of policies, observation checklists for practices and awareness questionnaires of DHCP were used. RESULTS: DHCP showed good awareness for most of infection control (IC) and X-ray safety items. However, there are no policies or procedures to control droplet infections in the clinics. The clinics were cl...
Objective: the purpose of this study was to evaluate and compare, gross fracture, patient satisfa... more Objective: the purpose of this study was to evaluate and compare, gross fracture, patient satisfaction, and marginal adaptation of anterior endocrowns restoring endodontically treated anterior teeth fabricated from IPS e.max press and CERASMART hybrid ceramics. Material and methods: A total of 24 patients were selected to receive an esthetic endocrowns for upper teeth in the esthetic zone (central incisor, lateral and canine).The 24 patients were divided into 2 groups (n=12 each), where Group (1): Control group: Teeth receiving IPS e.max press anterior endocrowns and Group (2): Intervention group: Tooth receiving CERASMART anterior endocrowns . After cementation all patients were recalled after 3, 6, 9, and 12 months. During each recall examination, USPHS criteria were adopted for clinical evaluation to score margin integrity and gross fracture. In addition, questionnaires were used to evaluate patients’ satisfaction and potential postoperative discomfort. Chi-square or Fisher’s Exa...
Statement of the Problem: The emergence of different types of scanners and competition in the mar... more Statement of the Problem: The emergence of different types of scanners and competition in the market raise a question on the
influence of these different scanners on the margin accuracy and internal fit of the CAD/CAM generated all-ceramic crowns.
Keywords: Margin Accuracy; Internal Fit; CAD/CAM; Implant-Abutment; Omnicam; Cone Beam
Material and Methods: The prefabricated titanium implant abutments used in this study were selected representing upper first
premolar. Three implant abutments were divided into 3 groups as follows: Group 1: consisted of 5 scans with the Cerec Bluecam.
Group 2: consisted of 5 scans with the Cerec Omnicam. Group 3: consisted of 5 scans with the Cerec Ineos camera. The vertical marginal
gap distance between the crown and the implant abutment was measured using stereomicroscope connected to computer and
digital camera. Measurements were made at thirty points for each surface of the crown. A rubber base replica of the space between
the crown and the implant abutments was made for each tested specimen to assess its internal fit using the stereomicroscope. The
recorded data were collected, tabulated and statistically analyzed.
Result: It was found that the mean and standard deviation values of marginal accuracy data were 130 ± 3 μm, 320 ± 3 μm and 100 ±
2 μm with Blue cam, Ineos and Omnicam, respectively. The mean and standard deviation values of internal fit data were 420 ± 21 μm,
260 ± 16 μm and 290 ± 15 μm with 3D Blue Cam, Ineos and Omnicam respectively. Result of obtained from Cone beam C.T. revealed
that the mean and standard deviation values of internal fit data were 450 ± 26 μm, 400 ± 23 μm and 360 ± 22 μm with 3D Blue Cam,
Ineos and Omnicam respectively (P-value < 0.05).
Conclusion: Within the limitations of this study, the following conclusions could be drawn: Digitizing techniques (Bluecam, Omnicam
and Ineos) had a great influence on the marginal adaptation and internal fit of all-ceramic crowns placed on implant-abutment.
Bluecam are the most appropriate digitizing technique in obtaining the best marginal adaptation compared to Ineos. Marginal accuracy
and internal fit values recorded in the tested groups lied within the range of clinical “acceptance (100 - 200) μm. Omnicam
scanner is not an appropriate digitizing technique in obtaining the best internal fit compared to bluecam and Ineos.
Background: Optical impairments of teeth in the esthetic zone constitute a problem for many denti... more Background: Optical impairments of teeth in the esthetic zone constitute a problem for many dentists and patients as several studies concluded that patients were dissatisfied of their dental appearance because of their restorations' color. The purpose of this study was to assess patient satisfaction combined with shade matching of VITA SUPRINITY versus lithium disilicate (IPS e-max CAD) all-ceramic crowns in esthetic zone. Methods: 26 patients with teeth problems indicated for full coverage restoration on one tooth in the esthetic zone (from upper central incisor to 1st premolar) were randomized into 2 equal groups (n=13) for which different CAD-CAM ceramic materials were used; (VITA SUPRINITY) a zirconia reinforced lithium silicate ceramic and (IPS e.max CAD) lithium disilicate glass ceramic. The crowns were fabricated to match the shade of the contra-lateral/ adjacent tooth and assessed using the modified USPHS criteria. Also patient satisfaction was assessed. The data obtaine...
Objective: To evaluate fracture resistance and survival rate of IPS Empress CAD versus Polished C... more Objective: To evaluate fracture resistance and survival rate of IPS Empress CAD versus Polished Celtra Duo ceramic laminate veneers. Material and Methods: Thirty-six ceramic laminate veneers were fabricated for maxillary anterior teeth. The patients were divided into two groups according to the material Group 1(control group) fabricated from IPS Empress CAD laminate veneers and group 2(intervention group) fabricated from Polished Celtra Duo laminate veneers. Standardized the same preparation with butt joint design and chamfer finish line located supra gingival were performed for all the teeth. The fabrication of the veneers was performed using Cad\Cam (Ceramill motion) machine, with software (Exocad). The veneers surfaces were treated and silanated according to the manufacture instruction of each ceramic and enamel surfaces were etched where total etch adhesive protocol was obeyed using BISCO. Follow up sessions were done every two months up to one year for each patient using dental...
Tensile Bond Strength of (PEEK) vs Lithium Disilicate Endocrown. (An Invitro study) Ahmed Riyad1,... more Tensile Bond Strength of (PEEK) vs Lithium Disilicate Endocrown. (An Invitro study) Ahmed Riyad1, Jylan Fouad El-Guindy 2 , Lamiaa Sayed Kheiralla 3 . Abstract Aim To assess the difference in tensile bond strength between (PEEK) and lithium disilicate endocrowns cemented to natural extracted teeth after thermocycling . Methodology 22 recently extracted human maxillary first molar teeth from diabetic patients ranging from 20 to 50 years old were collected from the Oral and Maxillofacial Surgical Department of Faculty of Dentistry, Cairo University. All teeth were subjected to standard endodontic treatment and mounted into resin pattern. Cavity preparation with butt joint design was made with copious water cooling using CNC special milling machine . The specimens were divided into 2 equal groups (n=11). 11 endocrowns were allocated to be constructed from lithium disilicate and others were allocated to be constructed from PEEK. All endocrowns were cemented on their corresponding teeth ...
Background: Cerasmart hybrid material offers specific advantages such as less fragility and more ... more Background: Cerasmart hybrid material offers specific advantages such as less fragility and more flexibility than glass ceramics. This material also has the option of readily modifying or repairing the surface and favorable stress-absorbing characteristics. In our study, Cerasmart hybrid and lithium disilicate ceramic laminate veneers with two different preparation designs were compared with regards to their fracture resistance. Methods: A total of 52 of comparable human central maxillary incisors were used. Group A (n=26) was made up of Cerasmart hybrid ceramic laminate veneers were fabricated from Cerasmart blocks, while Group B (n=26) was made up of lithium disilicate ceramic laminate veneers were made of IPS e.max pressable ingots. Each group was subdivided in two equal subgroups according to preparation designs. Subgroup I comprised Featheredge preparation design and subgroup II: Wraparound preparation design. All samples were subjected to thermocycling between 5°C and 55°C in ...
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influence of these different scanners on the margin accuracy and internal fit of the CAD/CAM generated all-ceramic crowns.
Keywords: Margin Accuracy; Internal Fit; CAD/CAM; Implant-Abutment; Omnicam; Cone Beam
Material and Methods: The prefabricated titanium implant abutments used in this study were selected representing upper first
premolar. Three implant abutments were divided into 3 groups as follows: Group 1: consisted of 5 scans with the Cerec Bluecam.
Group 2: consisted of 5 scans with the Cerec Omnicam. Group 3: consisted of 5 scans with the Cerec Ineos camera. The vertical marginal
gap distance between the crown and the implant abutment was measured using stereomicroscope connected to computer and
digital camera. Measurements were made at thirty points for each surface of the crown. A rubber base replica of the space between
the crown and the implant abutments was made for each tested specimen to assess its internal fit using the stereomicroscope. The
recorded data were collected, tabulated and statistically analyzed.
Result: It was found that the mean and standard deviation values of marginal accuracy data were 130 ± 3 μm, 320 ± 3 μm and 100 ±
2 μm with Blue cam, Ineos and Omnicam, respectively. The mean and standard deviation values of internal fit data were 420 ± 21 μm,
260 ± 16 μm and 290 ± 15 μm with 3D Blue Cam, Ineos and Omnicam respectively. Result of obtained from Cone beam C.T. revealed
that the mean and standard deviation values of internal fit data were 450 ± 26 μm, 400 ± 23 μm and 360 ± 22 μm with 3D Blue Cam,
Ineos and Omnicam respectively (P-value < 0.05).
Conclusion: Within the limitations of this study, the following conclusions could be drawn: Digitizing techniques (Bluecam, Omnicam
and Ineos) had a great influence on the marginal adaptation and internal fit of all-ceramic crowns placed on implant-abutment.
Bluecam are the most appropriate digitizing technique in obtaining the best marginal adaptation compared to Ineos. Marginal accuracy
and internal fit values recorded in the tested groups lied within the range of clinical “acceptance (100 - 200) μm. Omnicam
scanner is not an appropriate digitizing technique in obtaining the best internal fit compared to bluecam and Ineos.
influence of these different scanners on the margin accuracy and internal fit of the CAD/CAM generated all-ceramic crowns.
Keywords: Margin Accuracy; Internal Fit; CAD/CAM; Implant-Abutment; Omnicam; Cone Beam
Material and Methods: The prefabricated titanium implant abutments used in this study were selected representing upper first
premolar. Three implant abutments were divided into 3 groups as follows: Group 1: consisted of 5 scans with the Cerec Bluecam.
Group 2: consisted of 5 scans with the Cerec Omnicam. Group 3: consisted of 5 scans with the Cerec Ineos camera. The vertical marginal
gap distance between the crown and the implant abutment was measured using stereomicroscope connected to computer and
digital camera. Measurements were made at thirty points for each surface of the crown. A rubber base replica of the space between
the crown and the implant abutments was made for each tested specimen to assess its internal fit using the stereomicroscope. The
recorded data were collected, tabulated and statistically analyzed.
Result: It was found that the mean and standard deviation values of marginal accuracy data were 130 ± 3 μm, 320 ± 3 μm and 100 ±
2 μm with Blue cam, Ineos and Omnicam, respectively. The mean and standard deviation values of internal fit data were 420 ± 21 μm,
260 ± 16 μm and 290 ± 15 μm with 3D Blue Cam, Ineos and Omnicam respectively. Result of obtained from Cone beam C.T. revealed
that the mean and standard deviation values of internal fit data were 450 ± 26 μm, 400 ± 23 μm and 360 ± 22 μm with 3D Blue Cam,
Ineos and Omnicam respectively (P-value < 0.05).
Conclusion: Within the limitations of this study, the following conclusions could be drawn: Digitizing techniques (Bluecam, Omnicam
and Ineos) had a great influence on the marginal adaptation and internal fit of all-ceramic crowns placed on implant-abutment.
Bluecam are the most appropriate digitizing technique in obtaining the best marginal adaptation compared to Ineos. Marginal accuracy
and internal fit values recorded in the tested groups lied within the range of clinical “acceptance (100 - 200) μm. Omnicam
scanner is not an appropriate digitizing technique in obtaining the best internal fit compared to bluecam and Ineos.