Orthodontics and Orthodontology Commons^™

Oropharyngeal Airway Changes Following Orthodontic Treatment Of Anterior Open Bite In Growing Vs Non-Growing Patients, Mona Awadi, Heeyeon Suh, Joorok Park, Heesoo Oh

Orthodontics and Endodontics Theses

Introduction: Orthodontic treatment of anterior open bite can result in a counter-clockwise rotation of the mandible and a more ideal forward position of the tongue. Usually this movement is thought to increase the oropharyngeal airway. The primary aim of the present study was to evaluate changes in vertical dimension and airway in AOB patients following orthodontic treatment. Methods: 52 subjects were included in this retrospective study of anterior open bite malocclusion treated in the graduate orthodontics clinic at the University of the Pacific, Arthur A. Dugoni School of Dentistry between 2006 – 2019. Cephalometric and airway measurements were done by …

Association Of Type And Severity Of Nonsyndromic Orofacial Clefts With Combined Genotypes Of Rfc1 80 Ga, Mthfr 677 Ct, Irf6 (Rs642961) And Irf6 (Rs2235371) Gene Polymorphisms In An Indian Population, Chantal Hakim Dds, Msd, Marie M. Tolarová Md, Phd, Drsc, Miroslav Tolar Md, Phd

Orthodontics and Endodontics Theses

Association of type and severity of nonsyndromic OROFACIAL CLEFTS with combined genotypes of RFC1 80 GA, MTHFR 677 CT, IRF6 rs642961 and rs2235371 gene polymorphisms in an Indian population Abstract By Chantal Hakim University of the Pacific. Arthur Dugoni School of Dentistry 2020 Introduction. Genetic etiology of nonsyndromic orofacial clefts comprises many genes acting together. However, little is known about their interactions. The purpose of our study was to analyze associations of phenotypic subtypes of nonsyndromic orofacial clefts with combinations of four genotypes involving candidate gene polymorphisms. Materials and Methods. We analyzed a large dataset of cases and controls collected …

Comparison Of Skeletal And Dental Differences Between Class I And Class Ii Sides And Their Relationship With Asymmetric Molar Relationships In Class Ii Subdivision Malocclusions – A Cbct Study, Ivan Lo, Heeyeon Suh, Joorok Park, Heesoo Oh

Orthodontics and Endodontics Theses

Introduction: The purpose of this study is to compare dental and skeletal differences between Class I and Class II sides and their contributions to the degree of asymmetric molar relationship in Class II subdivision malocclusions using CBCT.

Methods: One hundred and eight patients presenting with Angle Class II subdivision malocclusions (mean age =21.05 years) were assessed with 3-dimensional cone-beam computed tomography scans. Paired t-tests were used to compare linear skeletal, angular and dental measurement differences between Class I and Class II sides. Correlations of linear skeletal, angular and dental measurement differences between Class I and Class II sides were made …

Invisalign First: A Qualitative Study On The Perceived Benefits And Drawbacks Of Invisalign First As A Treatment Modality For Mixed Dentition Patients, Erin Walker, James Chen

Orthodontics and Endodontics Theses

Given the recent implementation of Invisalign First for early interceptive orthodontic treatment, a limited number of orthodontists have had experience with this treatment modality and there currently are no published studies on the topic. The present study aims to use a qualitative survey to identify common themes in providers’ perceptions of Invisalign First as a new treatment option for early interceptive orthodontics. Twenty-three orthodontists in the private practice sector voluntarily participated in an open-ended survey via email. The results of the survey indicate the following common themes in regards to benefits of Invisalign First: fewer emergencies, patient comfort, patient experience, …

Prediction Of Class Iii Treatment Need And Success, Andrew Levin, James Chen

Orthodontics and Endodontics Theses

Objective: The purpose of the present study is to develop prognostic models for surgical need and treatment success for class III malocclusions. Material and Methods: This is a retrospective cohort study that evaluated treatment outcomes of consecutively treated patients at UCSF from Jan 1st 2007-Jan 1st 2012 and UoP from May 1st, 2014 – May 1st 2019. Receiver operator curves were used to develop prognostic models for surgical need and treatment success for class III malocclusions. Predictor variables were selected a priori (Class III-WITS, U1-PP, IMPA). The prognostic models were validated first using a UCSF validation cohort to show consistency …

Patient And Parent Perceptions On Outcomes In Early Orthodontic Treatment, Joseph Phillips, James Chen

Orthodontics and Endodontics Theses

Introduction: Orthodontics has clinical benefits, however, the psychosocial outcomes are not well understood. These soft benefits are often classified as aesthetic, functional, and psychosocial, however, there is limited work understanding these outcomes as reported directly from the patient. By better understanding the patient’s perspectives, we can continually refine our clinical model to be patient-centric and more appropriately manage the patient’s expectations and experiences. Materials and Methods: This is a cross-sectional qualitative study of 20 parents of 24 children ages 8-11 years. Participants were remotely interviewed using a semi-structured chronologically based line of questioning to elucidate their perceived outcomes of early …

Prevalence Of Short Root Anomaly In Patients Seeking Orthodontic Treatment, Tim Howarth, James Chen, Heesoo Oh

Orthodontics and Endodontics Theses

Introduction: The purpose of this study was to investigate variance in prevalence and severity of short root anomaly (SRA) in patients seeking orthodontic treatment, stratified by ethnicity and sex. Materials and Methods: In this retrospective cross-sectional study, we evaluated 896 patients who had initial cone-beam computed tomographies (CBCTs) taken from July 1, 2014 to May 30, 2019. Panoramic radiographs and images from the CBCTs of each patient were extracted and placed in a database. The crown-to-root ratio of maxillary central incisors, lateral incisors, canines, and all pre-molars were evaluated to determine the presence, severity and associations of SRA. A Chi-square …

Soft Tissue Effects From Maxillomandibular Advancement With Counterclockwise Rotation, Timothy Yu, Audrey Yoon, Stanley Yung Chuan Liu, Heeyeon Suh, Joorok Park, Heesoo Oh

Orthodontics and Endodontics Theses

Introduction: The purpose of the study was to evaluate the effects of maxillomandibular advancement (MMA) surgery with counterclockwise rotation on soft tissue oral and nasal structures. Materials and Methods: This retrospective study included 34 subjects diagnosed with OSA who underwent MMA at the Stanford Sleep Clinic. Initial (T1) and Final (T2) CBCTs were evaluated and compared for 10 hard tissue and 15 soft tissue measurements. Additionally, the external nasal valve surface area was measured and compared between the two time points. A 3D superimposition was performed and used to evaluate the relative hard and soft tissue movements. Results: There was …

Efficiency And Effectiveness Of Arch Expansion With Corticotomy-Assisted Clear Aligner Therapy, Thomas Roblee, Robert R. Boyd, James Chen, Heesoo Oh

Orthodontics and Endodontics Theses

Introduction: Surgically Facilitated Orthodontic Therapy (SFOT) has been utilized for years to overcome the limitations encountered with traditional orthodontic treatment of dentoalveolar and alveoloskeletal malocclusions. The procedure, which consists of full flap corticotomies and bone grafting, has many proposed benefits including increased speed and range of tooth movement. The purpose of this study is to evaluate arch expansion in patients treated with SFOT and clear aligners. Materials and Methods: A retrospective cohort study design was used to evaluate 51 consecutive adult patients that were treatment planned for significant arch expansion with corticotomies, bone grafting, and clear aligners. 17 of the …