Waleed Asiri - Academia.edu (original) (raw)

Papers by Waleed Asiri

Saudi journal of oral and dental research, Sep 20, 2023

In managing loose abutment screws, locating precisely the position of the screw access channel is... more In managing loose abutment screws, locating precisely the position of the screw access channel is difficult. This technique describes the use of cone-beam computed tomography (CBCT) and surgical guide planning software to locate the screw access channel with the intention of retrieving a loosened cement-retained implant-supported prosthesis. The method minimizes damage to the abutment crown assembly. Screw loosening is one of the most frequent mechanical complications observed in implantsupported dental prostheses,1, 2, 3 especially with respect to cement-retained implant-supported restorations.4 To retrieve a loosened cement-retained implant prostheses, it may be necessary to create a screw access channel through an existing restoration. Several methods for locating the screw access channel have been described, including using ceramic stains,5 acrylic resin;6 fabricating a vacuumformed template,7 forming a silicone putty matrix,8 using a handpiece sleeve,9 making extraoral and intr...

EFFECT OF EMERGENCE PROFILE OF A SINGLE IMPLANT RESTORATION ON THE HEALTH OF PERI-IMPLANT SOFT TI... more EFFECT OF EMERGENCE PROFILE OF A SINGLE IMPLANT RESTORATION ON THE HEALTH OF PERI-IMPLANT SOFT TISSUE Waleed Asiri, B.D.S Marquette University, 2018 Purpose: The specific aims of this retrospective study were 1) to compare the emergence angle of a SIC of the mandibular first molar to the emergence angle of the natural contralateral tooth, 2) to evaluate the effect of the emergence angle of SIC on the health of the peri-implant soft tissue and 3) to quantify an acceptable emergence angle among SIC. Materials and methods: Ten MUSoD patients were included, each patient was examined clinically for Plaque Index (PI), Probing Depth (PD), and Bleeding On Probing (BOP) on their mandibular first molar implant crown and contralateral natural unrestored mandibular first molar tooth. Followed with an intra-oral scan of the mandibular arch using Lava True Definition scanner. The emergence angles of mandibular first molars obtained with the scan were then compared to the gingival indices (PI, PD,...

The Journal of prosthetic dentistry, Jan 26, 2017

In managing loose abutment screws, locating precisely the position of the screw access channel is... more In managing loose abutment screws, locating precisely the position of the screw access channel is difficult. This technique describes the use of cone-beam computed tomography (CBCT) and surgical guide planning software to locate the screw access channel with the intention of retrieving a loosened cement-retained implant-supported prosthesis. The method minimizes damage to the abutment crown assembly.

The Journal of Advanced Prosthodontics, 2014

PURPOSE. To compare the accuracy of marginal and internal adaptation of zirconia (Zr) copings fab... more PURPOSE. To compare the accuracy of marginal and internal adaptation of zirconia (Zr) copings fabricated on anatomic (A), semi-anatomic (SA) and non-anatomic (NA) occlusal surface preparations. MATERIALS AND METHODS. 45 extracted bicuspid teeth were prepared for receiving zirconia crowns, with different occlusal preparation designs A=15, SA=15 & NA=15. The Zr copings were fabricated by using CAD4DENT, CAD/CAM. The copings were adjusted, cemented and were cross sectioned centrally from buccal cusp tip to lingual cusp tip into mesial and distal halves. The copings were examined under electron microscope at ×200 magnification and the measurements were recorded at 9 predetermined areas in micrometers. RESULTS. Overall mean gap values for the three groups was found to be 155.93±33.98 µm with Anatomical Occlusal preparation design having the least gap value of 139.23±30.85 µm showing the best adaptation among the groups. Post Hoc Tukey's test showed a statistically significant difference (P=.007) between the means of gap for A & NA preparation designs. Measurements recorded at 9 predetermined points showed variations for the three groups. CONCLUSION. Anatomical occlusal preparation designs resulted in better marginal and internal adaptation of Zr copings. There is a considerable variation between the measured marginal and internal gap values for the Zr copings fabricated by the (CAD4DENT-CAD/CAM). This variation may be associated with the lack of standardization of the preparation of teeth, computerized designing of the coping for each tooth, cement used, uniform pressure application during the cementation of the copings, sectioning of the copings and the microscopic measurements.

Saudi journal of oral and dental research, Sep 20, 2023

In managing loose abutment screws, locating precisely the position of the screw access channel is... more In managing loose abutment screws, locating precisely the position of the screw access channel is difficult. This technique describes the use of cone-beam computed tomography (CBCT) and surgical guide planning software to locate the screw access channel with the intention of retrieving a loosened cement-retained implant-supported prosthesis. The method minimizes damage to the abutment crown assembly. Screw loosening is one of the most frequent mechanical complications observed in implantsupported dental prostheses,1, 2, 3 especially with respect to cement-retained implant-supported restorations.4 To retrieve a loosened cement-retained implant prostheses, it may be necessary to create a screw access channel through an existing restoration. Several methods for locating the screw access channel have been described, including using ceramic stains,5 acrylic resin;6 fabricating a vacuumformed template,7 forming a silicone putty matrix,8 using a handpiece sleeve,9 making extraoral and intr...

EFFECT OF EMERGENCE PROFILE OF A SINGLE IMPLANT RESTORATION ON THE HEALTH OF PERI-IMPLANT SOFT TI... more EFFECT OF EMERGENCE PROFILE OF A SINGLE IMPLANT RESTORATION ON THE HEALTH OF PERI-IMPLANT SOFT TISSUE Waleed Asiri, B.D.S Marquette University, 2018 Purpose: The specific aims of this retrospective study were 1) to compare the emergence angle of a SIC of the mandibular first molar to the emergence angle of the natural contralateral tooth, 2) to evaluate the effect of the emergence angle of SIC on the health of the peri-implant soft tissue and 3) to quantify an acceptable emergence angle among SIC. Materials and methods: Ten MUSoD patients were included, each patient was examined clinically for Plaque Index (PI), Probing Depth (PD), and Bleeding On Probing (BOP) on their mandibular first molar implant crown and contralateral natural unrestored mandibular first molar tooth. Followed with an intra-oral scan of the mandibular arch using Lava True Definition scanner. The emergence angles of mandibular first molars obtained with the scan were then compared to the gingival indices (PI, PD,...

The Journal of prosthetic dentistry, Jan 26, 2017

In managing loose abutment screws, locating precisely the position of the screw access channel is... more In managing loose abutment screws, locating precisely the position of the screw access channel is difficult. This technique describes the use of cone-beam computed tomography (CBCT) and surgical guide planning software to locate the screw access channel with the intention of retrieving a loosened cement-retained implant-supported prosthesis. The method minimizes damage to the abutment crown assembly.

The Journal of Advanced Prosthodontics, 2014

PURPOSE. To compare the accuracy of marginal and internal adaptation of zirconia (Zr) copings fab... more PURPOSE. To compare the accuracy of marginal and internal adaptation of zirconia (Zr) copings fabricated on anatomic (A), semi-anatomic (SA) and non-anatomic (NA) occlusal surface preparations. MATERIALS AND METHODS. 45 extracted bicuspid teeth were prepared for receiving zirconia crowns, with different occlusal preparation designs A=15, SA=15 & NA=15. The Zr copings were fabricated by using CAD4DENT, CAD/CAM. The copings were adjusted, cemented and were cross sectioned centrally from buccal cusp tip to lingual cusp tip into mesial and distal halves. The copings were examined under electron microscope at ×200 magnification and the measurements were recorded at 9 predetermined areas in micrometers. RESULTS. Overall mean gap values for the three groups was found to be 155.93±33.98 µm with Anatomical Occlusal preparation design having the least gap value of 139.23±30.85 µm showing the best adaptation among the groups. Post Hoc Tukey's test showed a statistically significant difference (P=.007) between the means of gap for A & NA preparation designs. Measurements recorded at 9 predetermined points showed variations for the three groups. CONCLUSION. Anatomical occlusal preparation designs resulted in better marginal and internal adaptation of Zr copings. There is a considerable variation between the measured marginal and internal gap values for the Zr copings fabricated by the (CAD4DENT-CAD/CAM). This variation may be associated with the lack of standardization of the preparation of teeth, computerized designing of the coping for each tooth, cement used, uniform pressure application during the cementation of the copings, sectioning of the copings and the microscopic measurements.