measuring-maxillary-posterior-tooth-movement-model-assessment-using

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition

Since the introduction of Invisalign by Align Technology, Inc. in 1999, questions and debates have persisted regarding the precision of Invisalign (clear ...

University of British Columbia

This paper documents the experience of the University of British Columbia's Geriatric Dentistry Program (GDP) with emphasis on the dental treatment needs of patients during its first year of operation. The GDP provided access to dental care for residents of longterm care facilities, education for hospital staff concerning daily mouth care, education of dental students and an opportunity for research. The first year of clinical activity saw a small, yet significant, improvement in oral health for residents using the dental services. We hope that the outcomes of this new dental program for long-term care facilities will encourage dentists to provide care for this vulnerable population.

The development, implementation, utilization and outcomes of a comprehensive dental program for older adults residing in long-term care facilities.

Erythropoietic protoporphyria (EPP) is an inherited blood disorder in which formation of the heme group of hemoglobin is defective. Specifically, a deficiency of the enzyme ferrochelatase leads to the accumulation of protoporphyrin, resulting in often painful photosensitivity of the skin and tissues. The prevalence of EPP is estimated at 1:75,000 to 1:200,000. Photosensitivity is exhibited upon exposure to light with specific wavelengths through the creation of reactive oxygen products (oxidants), activation of the complement system, and mast cell degranulation. The aim of this article is to report the orthodontic treatment of an 11-year-old boy with EPP, a Class III skeletal relationship, and an anterior crossbite. Orthodontic treatment established normal overbite and overjet. Short-term periodontal and dental tissue responses to treatment were noted. Extra care was needed when collecting photographic and radiographic records for this patient and during some treatment procedures to avoid causing a photosensitive reaction of the skin or oral mucosa.

Orthodontic treatment considerations for a patient with erythropoietic protoporphyria.

Variations in treatment times for serial extraction and late premolar extraction patients may be due to differences in the time needed to flatten the occlusal curves. In this study, we compared tooth tipping and occlusal curves in patients treated by serial extractions or late premolar extractions with untreated controls.

Mandibular changes secondary to serial extractions compared with late premolar extractions and controls.

(1) Assess the level of available evidence regarding fistula occurrence in cleft lip and palate patients, (2) identify main research areas in the original studies, (3) evaluate the quality of original studies, and (4) summarize the evidence.

Fistula in Cleft Lip and Palate Patients-A Systematic Scoping Review.

One factor that can affect treatment outcomes is the treatment provider, and this factor has not been extensively studied. This research aimed to evaluate orthodontic treatment quality, length, and efficiency when 2 orthodontists collaborated on treatment, compared with the treatment provided solely by either orthodontist.

Outcomes of orthodontic treatment performed by individual orthodontists vs 2 orthodontists collaborating on treatment.

The purpose of this retrospective study was to evaluate the accuracy of intraoral scan (IOS) images in the maxillary and mandibular arches with orthodontic brackets.

Accuracy of intraoral scan images in full arch with orthodontic brackets: a retrospective in vivo study.

The purpose of this study was to demonstrate a new method for quantifying the difference between predicted and achieved tooth movement with Invisalign using stable three-dimensional (3D) mandibular landmarks and dental superimposition. Cone-beam computed tomography (CBCT) scans before (T1) and after (T2) the first series of aligners, their corresponding digital models (ClinCheck initial of the first series as T1 and ClinCheck initial of the refinement series as T2), and the ClinCheck final model of the first series as the predicted were obtained from 5 patients treated with non-extraction Invisalign therapy. After segmentation of the mandible and its dentition, T1 and T2 CBCTs were superimposed on stable anatomic structures (Pogonion and bilateral mental foramen) along with the pre-registered ClinCheck models. The 3D prediction differences between the predicted and achieved tooth position for 70 teeth with four types (incisor, canine, premolar and molar) were measured using a combination of software. The method employed in this study was tested to be reliable and repeatable with a very high intraclass correlation coefficient (ICC) for both intra- and inter-examiner reliability. Premolar Phi (rotation), Incisor Psi (mesiodistal angulation), and Molar Y (mesiodistal translation) showed a significant prediction difference (P < 0.05), which is also clinically relevant. The method involving CBCT and individual crown superimposition to measure the 3D positional changes in the mandibular dentition is a robust and novel one. While, our finding in terms of the predictability of Invisalign treatment in the mandibular dentition mainly served as a crude, cursory examination, which warrants further and more rigorous investigations. With this novel methodology, it is possible to measure any amount of 3D tooth position difference in the mandibular dentition either between the simulated and the actual or with treatment and/or growth. Deliberate use of overcorrection of which specific type of tooth movement with clear aligner treatment and to what extent, might be possible with future studies.

A new method assessing predicted and achieved mandibular tooth movement in adults treated with clear aligners using CBCT and individual crown superimposition.

Obesity and craniofacial structures are aetiologies of obstructive sleep apnoea (OSA). The effect of obesity onset on the craniofacial development and growth of obese OSA subjects has been suggested, but supporting data were lacking. This study aimed to assess the craniofacial features of adult obese OSA patients in relation to their obesity onset.

Article	Year
The development, implementation, utilization and outcomes of a comprehensive dental program for older adults residing in long-term care facilities. Journal (Canadian Dental Association)\| PubMed ID: 16772065	2006
Orthodontic treatment considerations for a patient with erythropoietic protoporphyria. American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics\| PubMed ID: 24286913	2013
Mandibular changes secondary to serial extractions compared with late premolar extractions and controls. American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics\| PubMed ID: 26432319	2015
Fistula in Cleft Lip and Palate Patients-A Systematic Scoping Review. Annals of plastic surgery\| PubMed ID: 27015328	2017
Outcomes of orthodontic treatment performed by individual orthodontists vs 2 orthodontists collaborating on treatment. American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics\| PubMed ID: 32473765	2020
Accuracy of intraoral scan images in full arch with orthodontic brackets: a retrospective in vivo study. Clinical oral investigations\| PubMed ID: 33475827	2021
A new method assessing predicted and achieved mandibular tooth movement in adults treated with clear aligners using CBCT and individual crown superimposition. Scientific reports\| PubMed ID: 36906671	2023
Craniofacial features of adult obese obstructive sleep apnoea patients in relation to the obesity onset - A pilot study. Orthodontics & craniofacial research\| PubMed ID: 38037851	2023

Edwin H. Yen

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