Donald J Ferguson

European University College, Dubai, UAE · Orthodontics

Objective: The objective of this article was to evaluate the effect of alpha binaural beat music on pain level after initial placement of a maxillary fixed appliance, compared to music without binaural beats (placebo) and no music (control). Methods: 60 patients undergoing maxillary fixed orthodontic appliance and initial archwire placement were...

Purpose The purpose of this study was to compare the efficacy of tooth movement between two clear aligner systems by comparing the predicted treatment outcomes versus actual outcomes achieved using a 3D best-fit algorithm. Materials & Methods Clear aligner therapy (CAT) was used to treat 62 patients; n=38 Invisalign® and n=24 Flash®. The Invisalig...

Purpose: The aim of this study was to investigate arch parameters and dentoalveolar changes from pretreatment to posttreatment by comparing the Miniscrew Assisted Rapid Palatal Expansion (MARPE), Periodontally Accelerated Osteogenic Orthodontics (PAOO), and Damon self-ligating bracket therapies. Materials and methods: Seventy-nine patients under...

Guidelines for tooth movement limits are meant to help clinicians in treatment planning decisions, especially for “severe” or “borderline” adult malocclusions. The purpose of this article was to review well accepted scope of care beliefs and compare with suggested scope treatment offered by Periodontally Accelerated Osteogenic Orthodontics (PAOO)....

An artificial intelligence expert system called the Computational Formulation of Orthodontic referral Decisions (CFOD) was created in order to provide decision-making for orthodontic diagnosis and referral in the Emirates public oral healthcare system. Purpose: The study purposes were to validate and implement the CFOD system, and to quantify GP an...

Introduction The effects of Invisalign clear aligner treatment with and without Dental Monitoring (DM) were compared for treatment duration, number of appointments, refinements and refinement aligners, and accuracy of Invisalign in achieving predicted tooth positions (aligner tracking). The null hypothesis was that there are no differences between...

Background Patient quality of life (QoL) during orthodontic treatment is an important consideration that requires greater academic investigation as greater focus is placed on enhancing patient experience. Quality of life (QoL) was assessed in three orthodontic appliance groups, i.e., vestibular, lingual, and aligners during the initial stages of tr...

Objectives To compare the efficacy of orthodontic tooth movement with three aligner wear protocols: 7 day, 10 day, and 14 day. Materials and Methods Eighty patients were randomly allocated into three groups: group A (7-day changes), group B (10-day changes), and group C (14-day changes). The posttreatment scans were compared with the final virtual...

ABSTRACT OBJECTIVES: The objective of the study was to evaluate the validity of five soft-tissue profile planes to actual horizontal lower lip changes following treatment of severe bimaxillary protrusion patients with vertical maxillary excess using extra-alveolar miniscrews. The null hypothesis was no differences in the incremental changes of hori...

Introduction The purpose of this research was to provide an update on the accuracy of tooth movement with Invisalign (Align Technology, Santa Clara, Calif). Methods This prospective clinical study included 38 patients treated with Invisalign Full or Invisalign Teen. All teeth, from the central incisor to the second molar, were measured on digital...

Objectives The purpose of the study was to epidemiologically assess the prevalence of malocclusion and orthodontic treatment need in school-aged adolescents in Dubai using the Index of Complexity, Outcome, and Need (ICON). Null hypothesis tested was no significant differences in ICON scores among Dubai students as a function of gender or geographic...

Objectives The objective of the study is to compare maxillary central incisor gingival papilla and zenith heights photogrammetically in orthodontically treatment patients with and without periodontally accelerated osteogenic orthodontics (PAOOs). Materials and Methods Samples of 29 participants were matched for pre-treatment age and five gingival...

Introduction: To evaluate and compare the vertical changes in patients treated orthodontically with or without different patterns of premolars extraction. Materials & Method: The lateral cephalograms of 112 orthodontically treated patients were categorized into four groups of 28 each based upon extraction strategy. Cephalometric analysis comprised...

This case report describes a patient with severe (11-mm) mandibular anterior crowding who received periodontally accelerated osteogenic orthodontics (PAOO) nonextraction treatment, showing 5-year follow-up. A 15-year-old female presented with severe dental crowding, Angle Class I skeletal and molar relationships and a Class II canine relationship,...

This article presents the orthodontic treatment of a 15 year old male patient with an Angle class I malocclusion with a class II skeletal base, lower incisor proclination along with a hyperdivergent facial pattern. Such situations that involve camouflage treatment, usually results in further lower incisor proclination which can be reduced to an ext...

Objectives: To compare forced-eruption times for palatally impacted canines treated with and without the ostectomy-decortication technique and to assess the influence of palatally impacted canine pretreatment position and angle on forced-eruption time. Materials and methods: The sample was composed of 118 patient-subjects with 151 palatally impa...

Objective: To investigate the relationships between the stages of calcification of mandibular right and left second molars using Demirjian method and skeletal maturity stages using cervical vertebrae maturity index (CVMI) among Omani subjects. To establish a valid clinical tool for indication of pubertal growth period in Omani children and adolesce...

Background and Purpose: Accelerated tooth movement is facilitated by intentional injury of the periodontium followed by alveolar bone turnover, and bone biomarkers can be used to monitor bone turnover activity. The purpose of this literature review was to evaluate various surgical acceleration techniques using catabolic bone biomarkers to discrimin...

Purpose: To test for difference in accuracy of 3D facial integument measurements of three indirect facial measurement techniques compared to measuring integument facial features directly. Materials & Methods: Four measurement methods were used to measure 25 patients (15 females and 10 males): 1) direct anthropometric facial (direct), 2) volume wrap...

Purpose: To compare the treatment efficacy and efficiency of the two CAD/CAM customized bracket systems Incognito (lingual) and Insignia (labial) for differences in: 1) ABO Cast and Radiograph Evaluation system scores, 2) efficiency as assessed by three clinical measures of efficiency, and 3) final treatment outcome and the virtual set up. Material...

Tele-orthodontics is a broad term that encompasses remote provision of orthodontic care, advice, or treatment via information technology. The Purposes of the article were two-fold: (1) to review the rather new concept, applications and scope of teleorthodontics, and (2) to present preliminary results of a study with and without Dental Monitoring™ (...

Introduction Temporary anchorage devices (TADs) have been shown to be effective in the treatment of VME and/or bimaxillary protrusion but literature focus has been on maxillary miniscrews and not on the efficacy of mandibular TADs. In the present study, orthodontic extraction therapy was combined with maxillary extra alveolar TADs in the treatment...

Purpose Irregularity accounts for interproximal contact point displacements and can be measured using a variety of techniques. The aim of this study was to evaluate the validity and reliability of three methods in relation to the “gold standard” of manual caliper measurements of plaster study casts. Materials and Methods Six mandibular study casts...

The current concept of “pressure-tension” tooth movement is based upon reductionist explanations of parsed physiological processes that do not provide a cohesive understanding of clinically relevant tooth movement. The biology underlying accelerated orthodontic techniques have refocused attention on disruptions of tensional integrity of microenviro...

Purpose The purpose of this study was to assess the accuracy of three-dimensional (3D) cone beam computed tomography (CBCT) study casts by comparing with direct measurements taken from plaster study casts. Materials and Methods The dental arches of 30 patient subjects were imaged with a Kodak 9300 3D CBCT devise; Anatomodels were created and in vi...

Purpose This study aimed to reexamine the relationship between mandibular incisor inclination, prominence and vertical changes in position, and keratinized gingival tissue (KT) height changes labial to the mandibular incisors after orthodontic treatment with and without augmented corticotomy (Cort). Materials and Methods Two orthodontically treate...

Periodontally accelerated osteogenic orthodontics (PAOO) is an accelerated tooth movement technique resulting in enhanced stability of treatment outcomes. Mandibular irregularity index was recently demonstrated to be significantly more stable at 10-years post treatment, and the purpose of this review article was to summarize current literature resu...

Objective: The objective of this study is to determine the frequency of impacted maxillary canines using seven subtype classification system. For this purpose, impacted maxillary canines have been divided into seven various subtypes. Materials and Methods: This is a descriptive, cross‑sectional, and retrospective study conducted using radiographic...

Objective: The objective of this study is to determine the frequency of impacted maxillary canines using seven subtype classification system. For this purpose, impacted maxillary canines have been divided into seven various subtypes. Materials and Methods: This is a descriptive, cross‑sectional, and retrospective study conducted using radiographic...

AutoSlides presentation introducing Seminars in Orthodontics article ”Instability of the mandibular dental arch? Look again!”. http://audioslides.elsevier.com/getvideo.aspx?doi=10.1053/j.sodo.2016.12.006

Changes in mandibular dental arch parameters have been thoroughly investigated as a function of time after removal of orthodontic appliances and instability tenets have emerged. To date, only permanent fixed retention as a posttreatment strategy has been demonstrated effective against changes in mandibular anterior alignment. No active orthodontic...

Tooth movement, as it is generally visualized by orthodontist clinicians, is modeled as a biological event mediated by the cells of the periodontal ligament (PDL) whereby alveolar bone resorption is witnessed on the “pressure” side and bone apposition on the “tension” side. This “pressure-tension” image is burned so deeply into the orthodontic psyc...

Background Literature evidence suggests that root resorption, an adverse side effect of orthodontic therapy, may be decreased under conditions of alveolar osteopenia, a condition characterized by diminished bone density and created secondary to alveolar corticotomy (Cort) surgery. Purpose To compare root resorption of the maxillary central incisor...

Purpose The quality of orthopantogram (OPG) images is primarily a function of patient positioning during image capture. The purpose of the investigation was to evaluate the quality of digital panoral radiographic images obtained by using the same imaging device in a large dental treatment center on the basis of the radiography technician operator s...

Omani subjects (n=149) ages 8 to 17 years were evaluated for relationship between stages of mandibular second molar calcification (DI) and skeletal maturity stages of cervical vertebrae maturity index (CVMI). DI stages are a reliable indicator of skeletal maturity and can be used as a clinical tool in predicting the skeletal maturity stages in Oman...

Omani subjects (n=149) ages 8 to 17 years were evaluated for relationship between stages of mandibular second molar calcification (DI) and skeletal maturity stages of cervical vertebrae maturity index (CVMI). DI stages are a reliable indicator of skeletal maturity and can be used as a clinical tool in predicting the skeletal maturity stages in Oman...

Omani subjects (n=149) ages 8 to 17 years were evaluated for relationship between stages of mandibular second molar calcification (DI) and skeletal maturity stages of cervical vertebrae maturity index (CVMI). DI stages are a reliable indicator of skeletal maturity and can be used as a clinical tool in predicting the skeletal maturity stages in Oman...

Omani subjects (n=149) ages 8 to 17 years were evaluated for relationship between stages of mandibular second molar calcification (DI) and skeletal maturity stages of cervical vertebrae maturity index (CVMI). DI stages are a reliable indicator of skeletal maturity and can be used as a clinical tool in predicting the skeletal maturity stages in Oman...

Omani subjects (n=149) ages 8 to 17 years were evaluated for relationship between stages of mandibular second molar calcification (DI) and skeletal maturity stages of cervical vertebrae maturity index (CVMI). DI stages are a reliable indicator of skeletal maturity and can be used as a clinical tool in predicting the skeletal maturity stages in Oman...

Background: The posttreatment and retention outcomes following nonextraction orthodontic therapy, with and without corticotomy, were assessed using the American Board of Orthodontists objective grading system (OGS). Purpose: The purpose was to determine if the course of retention was any different following alveolar decortication and augmentation b...

To compare the keratinized gingival tissue (KT) height labial to the mandibular incisors after orthodontic treatment with and without alveolar corticotomy and bone grafting. Two orthodontically treated groups of 35 patients each, with (Cort) and without (Conv) alveolar decortication and augmentation bone grafting, were matched in this case controll...

Purpose: The study purpose was to assess the accuracy of measurements made using digital models obtained from 3Shape scanners using three different techniques: 1) Intraoral scanning of the patient's mouth 2) Extra oral scanning of a plaster model 3) Model scanning with a D700 device by comparing to measurements made manually on the plaster study ca...

Objective: To evaluate mandibular irregularity index stability following orthodontic treatment facilitated by alveolar corticotomy and augmentation bone grafting (Cort+). Materials and methods: The irregularity index of 121 orthodontically treated and 15 untreated patient study casts was analyzed at 5 years and 10 years. Results: Cort+ resulte...

One of the biological constraints in orthodontics is the amount of time it takes to resolve malocclusion. A reduction in active treatment time would logically mean that teeth would need to move faster. Long et al. evaluates the effectiveness of five interventions on accelerating orthodontic tooth movement, including low-level laser therapy, alveola...

Aim: The purpose of the study was to compare and contrast the orthodontic treatment needs of Dubai school-age school age children as a function of gender and ethnicity. Methods: A total of 20,880 subjects were screened in 66 public and private school located in Dubai, United Arab Emirates. The study sample was grouped according to seven geographic...

Aims: To compare and contrast oral health related data related to Simplified Oral hygiene index (OHI-S) in Dubai school-aged students as a function of the population demographics gender and ethnicity. Methods: A total of 20,880 subjects were screened in 66 public and private school located in Dubai, United Arab Emirates. The study sample was gro...

Background: A review of literature indicates the Arab cephalometric pattern compared to the Caucasian cephalometric pattern is skeletally bimaxillary retrusive, dentally bimaxillary protrusive, and more divergent palatal and mandibular planes. Objective: The aim of this study was to clarify the cephalometric features of Emirates adults with Clas...

Periodontal accelerated osteogenic orthodontics (PAOO) is a clinical procedure that combines selective alveolar corticotomy, particulate bone grafting, and the application of orthodontic forces.1 This procedure is theoretically based on the bone healing pattern known as the regional acceleratory phenomenon (RAP).2 PAOO results in an increase in alv...

Corticotomy-assisted and osteotomy-assisted tooth movement involves surgical incisions through the alveolar bone. To ascertain whether teeth move by distraction osteogenesis or by regional accelerated phenomenon (RAP), we randomly assigned 30 Sprague-Dawley rats to one of 5 experimental groups: corticotomy alone, corticotomy-assisted tooth movement...

Following selective alveolar decortication as defined by the surgical scarring of the alveolar cortex, severe malocclusions can be orthodontically treated in six months. When combined with bone grafting, this technique also significantly expands the scope of treatment in resolving extreme dental arch crowding or borderline skeletal problems with st...

Modifying the balance between resorption and apposition through selectively injuring the cortical plate of the alveolus has been an approach to speed tooth movement and is referred to as periodontally accelerated osteogenic orthodontics. The aim of this study was to investigate the alveolar response to corticotomy as a function of time and proximit...

Periodontally Accelerated Osteogenic Orthodontics(PAOO) Miniscrew Implants for Orthodontic Anchorage

When combined with orthodontics, selective periodontal decortication has been shown to be clinically effective in eliminating severe malocclusions three to four times more rapidly than conventional orthodontic treatment. Our technique combines surgical scarring of the cortical bone on both labial and lingual sides of the teeth to be moved, with an...

When combined with orthodontics, selective periodontal decortication has been shown to be clinically effective in eliminating severe malocclusions three to four times more rapidly than conventional orthodontic treatment. Our technique combines surgical scarring of the cortical bone on both labial and lingual sides of the teeth to be moved, with an...