Mazyar Moshiri - Academia.edu (original) (raw)

Papers by Mazyar Moshiri

Research paper thumbnail of Introduction to LightForce

Research paper thumbnail of Long-Term Outcome of Cleft Lip Nasal Reconstruction in Childhood

Plastic and Reconstructive Surgery, Apr 1, 2000

Research paper thumbnail of Product review and demonstration of the Invisalign clear aligner system

AJO-DO Clinical Companion

Research paper thumbnail of Considerations for treatment of patients undergoing orthognathic surgery using clear aligners

AJO-DO Clinical Companion, 2022

Research paper thumbnail of Long-Term Outcome of Cleft Lip Nasal Reconstruction in Childhood

Plastic and Reconstructive Surgery, 2000

Research paper thumbnail of Clear aligner technique

American Journal of Orthodontics and Dentofacial Orthopedics, 2018

Research paper thumbnail of Does age influence deep overbite correction with Invisalign? A prospective study evaluating mandibular incisor intrusion in adolescents vs adults

The Angle Orthodontist

Objective To compare the accuracy of mandibular incisor intrusion with Invisalign (Align Technolo... more Objective To compare the accuracy of mandibular incisor intrusion with Invisalign (Align Technology, Santa Clara, Calif) in adolescents to that in adults. Materials and Methods This prospective clinical study included 58 patients treated with either Invisalign Teen or Invisalign Full. Mandibular central and lateral incisors were measured on digital models created from intraoral scans. Predicted values were determined by superimposing the initial and final ClinCheck models, and achieved values were determined by superimposing the initial ClinCheck models and the digital models from the final scans. Individual teeth were superimposed with a best-fit analysis and measured using Compare software (version 8.1; GeoDigm, Falcon Heights, Minn). Results The mean accuracies of mandibular incisor intrusion were 63.5% in adolescents and 45.3% in adults, and this difference was statistically significant. The amounts of achieved intrusion were 1.7 mm in adolescents and 0.9 mm in adults, and this ...

Research paper thumbnail of Clear aligners, dentofacial orthopedics, physics and supercorrection prescription biomechanics. A meeting of the minds

Seminars in Orthodontics, 2021

Research paper thumbnail of Consequences of Poor ora l hyg iene During Clear ali gner Therapy

Research paper thumbnail of Invisalign eighth-generation features for deep-bite correction and posterior arch expansion

Seminars in Orthodontics, 2021

Research paper thumbnail of Mechanical considerations for deep-bite correction with aligners

Seminars in Orthodontics, 2020

Correction of deep-bite malocclusions with aligners is challenging for orthodontists. This review... more Correction of deep-bite malocclusions with aligners is challenging for orthodontists. This review is intended to help orthodontists improve their clinical success in treating deep-bite malocclusions with aligners. Virtual case setup, attachment design, elastics, and bite ramp utilization are discussed in order to better equip orthodontists with a new "best practices" paradigm.

Research paper thumbnail of Comparative linear accuracy and reliability of cone beam CT derived 2-dimensional and 3-dimensional images constructed using an orthodontic volumetric rendering program

The purpose of this project was to compare the accuracy and reliability of linear measurements ma... more The purpose of this project was to compare the accuracy and reliability of linear measurements made on 2D projections and 3D reconstructions using Dolphin 3D software (Chatsworth, CA) as compared to direct measurements made on human skulls. The linear dimensions between 6 bilateral and 8 mid-sagittal anatomical landmarks on 23 dentate dry human skulls were measured three times by multiple observers using a digital caliper to provide twenty orthodontic linear measurements .. The skulls were stabilized and imaged via PSP digital cephalometry as well as CBCT. The PSP cephalograms were imported into Dolphin (Chatsworth, CA, USA) and the 3D volumetric data set was imported into Dolphin 3D (Version 2.3, Chatsworth, CA, USA). Using Dolphin 3D, planar cephalograms as well as 3D volumetric surface reconstructions were (3D CBCT) generated. The linear measurements between landmarks of each three modalities were then computed by a single observer three times. For 2D measurements, a one way ANOV A for each measurement dimension was calculated as well as a post hoc Scheffe multiple comparison test with the anatomic distance as the control group. 3D measurements were compared to anatomic truth using Student's t test (P:50.05). The intraclass correlation coefficient (ICC) and absolute linear and percentage error were determined as indices of intraobserver reliability. v Our results show that for 20 mid sagittal measurements that Simulated LC images are accurate and similar to those from PSP images (except for Ba-Na), and for bilateral measurements simulated LC measurements were similar to PSP but less accurate, underestimating dimensions by between 4.7% to 17%. For 3D volumetric renderings, 2/3 rd of CBCT measurements are statistically different from actual measurements, however this possibly

Research paper thumbnail of Consequences of poor oral hygiene during aligner therapy

Journal of clinical orthodontics : JCO, 2013

Research paper thumbnail of Dentomaxillofacial cone-beam CT for orthodontic assessment

International Congress Series, 2005

Cone-beam computed tomography (CBCT) systems dedicated to craniofacial imaging are now available ... more Cone-beam computed tomography (CBCT) systems dedicated to craniofacial imaging are now available from several different manufacturers. Potentially, CBCT will permit the use of 3D cephalometrics for orthodontic assessment. A simple method is demonstrated to simulate conventional 2D cephalograms from CBCT image files. Such cephalogram simulations can be used to facilitate transfer of growth projections from existing datasets as a starting point for use of the new 3D paradigm.

Research paper thumbnail of Linear Accuracy and Reliability of Cone Beam CT Derived 3-Dimensional Images Constructed Using an Orthodontic Volumetric Rendering Program

The Angle Orthodontist, 2008

Objective: To compare accuracy of linear measurements made on cone beam computed tomographic (CBC... more Objective: To compare accuracy of linear measurements made on cone beam computed tomographic (CBCT) derived 3-dimensional (3D) surface rendered volumetric images to direct measurements made on human skulls. Materials and Methods: Twenty orthodontic linear measurements between anatomical landmarks on 23 human skulls were measured by observers using a digital caliper. The skulls were imaged with CBCT and Dolphin 3D (version 2.3) software used to generate 3D volumetric reconstructions (3DCBCT). The linear measurements between landmarks were computed by a single observer three times and compared to anatomic dimensions using Student's t-test (P ≤ .05). The intraclass correlation coefficient (ICC) and absolute linear and percentage error were calculated. Results: The ICC for 3DCBCT (0.975 ± 0.016) was significantly less than for skull (0.996 ± 0.007) measurements. Mean percentage measurement error for 3DCBCT (2.31% ± 2.11%) was significantly higher than replicate skull measurements (0...

Research paper thumbnail of Accuracy of linear measurements from imaging plate and lateral cephalometric images derived from cone-beam computed tomography

American Journal of Orthodontics and Dentofacial Orthopedics, 2007

As orthodontic practice moves toward 3-dimensional cephalometric analyses, a solution is required... more As orthodontic practice moves toward 3-dimensional cephalometric analyses, a solution is required to ensure sustained availability of well-established projected treatment outcomes based on 2-dimensional analyses. This ex-vivo study was conducted to compare the accuracy of linear measurements made on photostimulable phosphor cephalograms with 3 methods for simulating lateral cephalograms with cone-beam computed tomography (CBCT). Methods: The linear distances between anatomical landmarks on dentate dry human skulls were measured by observers using digital calipers for S-N, BaN , M-N, ANS-N, ANS-PNS, Pog-Go, Go-M, PoOr , and Go-Co. The skulls were imaged with CBCT with a single 360°rotation, producing 306 basis images and achieving 0.4 mm isotrophic voxel resolution on volumetric reconstruction for making ray-sum reconstructed cephalograms. Two other cephalogram approaches were used with the CBCT system-a single transmission image generated as a scout image designed to check patient positioning before CBCT, and a single-frame lateral basis image. Conventional digital lateral cephalograms (LCs) were acquired with the photostimulable phosphor system. Images were imported into a cephalometric analysis program (Dolphin Imaging Cephalometric and Tracing Software, Chatsworth, Calif) to compute the included linear measurements. Analyses were repeated 3 times and statistically compared with measured anatomic truth with ANOVA (P Յ.05). The intraclass correlation coefficient was determined as an index of intra-and interobserver reliability. Results: The intraclass correlation coefficient for the LCs was significantly less than for the measured anatomic truth and for all CBCT-derived images. CBCT images either produced with individual frames or reconstructed from the volumetric data set were accurate for all measurements except Pog-Go and Go-M. CBCT scout images had the second highest accuracy for all measurements except Pog-Go, Go-M, and Go-Co. Conventional LCs had the least accuracy; they were accurate only for PoOr and ANS-N. Conclusions: CBCT-derived 2-dimensional LCs proved to be more accurate than LCs for most linear measurements calculated in the sagittal plane. No advantage was found over single-frame basis images in using ray-sum generated cephalograms from the CBCT volumetric data set.

Research paper thumbnail of Introduction to LightForce

Research paper thumbnail of Long-Term Outcome of Cleft Lip Nasal Reconstruction in Childhood

Plastic and Reconstructive Surgery, Apr 1, 2000

Research paper thumbnail of Product review and demonstration of the Invisalign clear aligner system

AJO-DO Clinical Companion

Research paper thumbnail of Considerations for treatment of patients undergoing orthognathic surgery using clear aligners

AJO-DO Clinical Companion, 2022

Research paper thumbnail of Long-Term Outcome of Cleft Lip Nasal Reconstruction in Childhood

Plastic and Reconstructive Surgery, 2000

Research paper thumbnail of Clear aligner technique

American Journal of Orthodontics and Dentofacial Orthopedics, 2018

Research paper thumbnail of Does age influence deep overbite correction with Invisalign? A prospective study evaluating mandibular incisor intrusion in adolescents vs adults

The Angle Orthodontist

Objective To compare the accuracy of mandibular incisor intrusion with Invisalign (Align Technolo... more Objective To compare the accuracy of mandibular incisor intrusion with Invisalign (Align Technology, Santa Clara, Calif) in adolescents to that in adults. Materials and Methods This prospective clinical study included 58 patients treated with either Invisalign Teen or Invisalign Full. Mandibular central and lateral incisors were measured on digital models created from intraoral scans. Predicted values were determined by superimposing the initial and final ClinCheck models, and achieved values were determined by superimposing the initial ClinCheck models and the digital models from the final scans. Individual teeth were superimposed with a best-fit analysis and measured using Compare software (version 8.1; GeoDigm, Falcon Heights, Minn). Results The mean accuracies of mandibular incisor intrusion were 63.5% in adolescents and 45.3% in adults, and this difference was statistically significant. The amounts of achieved intrusion were 1.7 mm in adolescents and 0.9 mm in adults, and this ...

Research paper thumbnail of Clear aligners, dentofacial orthopedics, physics and supercorrection prescription biomechanics. A meeting of the minds

Seminars in Orthodontics, 2021

Research paper thumbnail of Consequences of Poor ora l hyg iene During Clear ali gner Therapy

Research paper thumbnail of Invisalign eighth-generation features for deep-bite correction and posterior arch expansion

Seminars in Orthodontics, 2021

Research paper thumbnail of Mechanical considerations for deep-bite correction with aligners

Seminars in Orthodontics, 2020

Correction of deep-bite malocclusions with aligners is challenging for orthodontists. This review... more Correction of deep-bite malocclusions with aligners is challenging for orthodontists. This review is intended to help orthodontists improve their clinical success in treating deep-bite malocclusions with aligners. Virtual case setup, attachment design, elastics, and bite ramp utilization are discussed in order to better equip orthodontists with a new "best practices" paradigm.

Research paper thumbnail of Comparative linear accuracy and reliability of cone beam CT derived 2-dimensional and 3-dimensional images constructed using an orthodontic volumetric rendering program

The purpose of this project was to compare the accuracy and reliability of linear measurements ma... more The purpose of this project was to compare the accuracy and reliability of linear measurements made on 2D projections and 3D reconstructions using Dolphin 3D software (Chatsworth, CA) as compared to direct measurements made on human skulls. The linear dimensions between 6 bilateral and 8 mid-sagittal anatomical landmarks on 23 dentate dry human skulls were measured three times by multiple observers using a digital caliper to provide twenty orthodontic linear measurements .. The skulls were stabilized and imaged via PSP digital cephalometry as well as CBCT. The PSP cephalograms were imported into Dolphin (Chatsworth, CA, USA) and the 3D volumetric data set was imported into Dolphin 3D (Version 2.3, Chatsworth, CA, USA). Using Dolphin 3D, planar cephalograms as well as 3D volumetric surface reconstructions were (3D CBCT) generated. The linear measurements between landmarks of each three modalities were then computed by a single observer three times. For 2D measurements, a one way ANOV A for each measurement dimension was calculated as well as a post hoc Scheffe multiple comparison test with the anatomic distance as the control group. 3D measurements were compared to anatomic truth using Student's t test (P:50.05). The intraclass correlation coefficient (ICC) and absolute linear and percentage error were determined as indices of intraobserver reliability. v Our results show that for 20 mid sagittal measurements that Simulated LC images are accurate and similar to those from PSP images (except for Ba-Na), and for bilateral measurements simulated LC measurements were similar to PSP but less accurate, underestimating dimensions by between 4.7% to 17%. For 3D volumetric renderings, 2/3 rd of CBCT measurements are statistically different from actual measurements, however this possibly

Research paper thumbnail of Consequences of poor oral hygiene during aligner therapy

Journal of clinical orthodontics : JCO, 2013

Research paper thumbnail of Dentomaxillofacial cone-beam CT for orthodontic assessment

International Congress Series, 2005

Cone-beam computed tomography (CBCT) systems dedicated to craniofacial imaging are now available ... more Cone-beam computed tomography (CBCT) systems dedicated to craniofacial imaging are now available from several different manufacturers. Potentially, CBCT will permit the use of 3D cephalometrics for orthodontic assessment. A simple method is demonstrated to simulate conventional 2D cephalograms from CBCT image files. Such cephalogram simulations can be used to facilitate transfer of growth projections from existing datasets as a starting point for use of the new 3D paradigm.

Research paper thumbnail of Linear Accuracy and Reliability of Cone Beam CT Derived 3-Dimensional Images Constructed Using an Orthodontic Volumetric Rendering Program

The Angle Orthodontist, 2008

Objective: To compare accuracy of linear measurements made on cone beam computed tomographic (CBC... more Objective: To compare accuracy of linear measurements made on cone beam computed tomographic (CBCT) derived 3-dimensional (3D) surface rendered volumetric images to direct measurements made on human skulls. Materials and Methods: Twenty orthodontic linear measurements between anatomical landmarks on 23 human skulls were measured by observers using a digital caliper. The skulls were imaged with CBCT and Dolphin 3D (version 2.3) software used to generate 3D volumetric reconstructions (3DCBCT). The linear measurements between landmarks were computed by a single observer three times and compared to anatomic dimensions using Student's t-test (P ≤ .05). The intraclass correlation coefficient (ICC) and absolute linear and percentage error were calculated. Results: The ICC for 3DCBCT (0.975 ± 0.016) was significantly less than for skull (0.996 ± 0.007) measurements. Mean percentage measurement error for 3DCBCT (2.31% ± 2.11%) was significantly higher than replicate skull measurements (0...

Research paper thumbnail of Accuracy of linear measurements from imaging plate and lateral cephalometric images derived from cone-beam computed tomography

American Journal of Orthodontics and Dentofacial Orthopedics, 2007

As orthodontic practice moves toward 3-dimensional cephalometric analyses, a solution is required... more As orthodontic practice moves toward 3-dimensional cephalometric analyses, a solution is required to ensure sustained availability of well-established projected treatment outcomes based on 2-dimensional analyses. This ex-vivo study was conducted to compare the accuracy of linear measurements made on photostimulable phosphor cephalograms with 3 methods for simulating lateral cephalograms with cone-beam computed tomography (CBCT). Methods: The linear distances between anatomical landmarks on dentate dry human skulls were measured by observers using digital calipers for S-N, BaN , M-N, ANS-N, ANS-PNS, Pog-Go, Go-M, PoOr , and Go-Co. The skulls were imaged with CBCT with a single 360°rotation, producing 306 basis images and achieving 0.4 mm isotrophic voxel resolution on volumetric reconstruction for making ray-sum reconstructed cephalograms. Two other cephalogram approaches were used with the CBCT system-a single transmission image generated as a scout image designed to check patient positioning before CBCT, and a single-frame lateral basis image. Conventional digital lateral cephalograms (LCs) were acquired with the photostimulable phosphor system. Images were imported into a cephalometric analysis program (Dolphin Imaging Cephalometric and Tracing Software, Chatsworth, Calif) to compute the included linear measurements. Analyses were repeated 3 times and statistically compared with measured anatomic truth with ANOVA (P Յ.05). The intraclass correlation coefficient was determined as an index of intra-and interobserver reliability. Results: The intraclass correlation coefficient for the LCs was significantly less than for the measured anatomic truth and for all CBCT-derived images. CBCT images either produced with individual frames or reconstructed from the volumetric data set were accurate for all measurements except Pog-Go and Go-M. CBCT scout images had the second highest accuracy for all measurements except Pog-Go, Go-M, and Go-Co. Conventional LCs had the least accuracy; they were accurate only for PoOr and ANS-N. Conclusions: CBCT-derived 2-dimensional LCs proved to be more accurate than LCs for most linear measurements calculated in the sagittal plane. No advantage was found over single-frame basis images in using ray-sum generated cephalograms from the CBCT volumetric data set.