Change in Root Angulation of Maxillary Molars and Incisors After Orthodontic Treatment PDF Download
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Author: Brett C. Alvey
Publisher:
ISBN:
Category : Molar
Languages : en
Pages : 25
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Book Description
Introduction: Proper root parallelism is an important goal of orthodontic treatment that allows for the best possible functional and esthetic result. Maxillary lateral incisors and second molars are two common teeth for which practitioners fail to achieve acceptable root parallelism. The aim of this study was to investigate angulation changes that non-parallel roots of maxillary lateral incisors and second molars undergo after orthodontic treatment. Methods: Records of 68 patients with angled roots of interest were analyzed immediately following orthodontic treatment, T1 (average age 16.1 ± 3.7 years) and at long-term follow-up, T [subscript] Latest (15.4 ± 4.5 years). Panoramic radiographs were used to measure the mesiodistal angulations of roots at both time points. Dental casts, lateral cephalometric radiographs, and patient demographic information were used to analyze factors that could be associated with interradicular angulation changes occurring between T1 and T [subscript] Latest. Results: On average, lateral incisors uprighted 4.79 ± 3.23 degrees, and second molars uprighted 5.52 ± 5.33 degrees. Gender (male) and age at T1 were significantly associated with incisor uprighting. Interradicular angulation at T1 and increased facial height were significantly associated with uprighting of both incisor and molar roots. Conclusions: On average, non-parallel roots of maxillary lateral incisors and second molars tend to upright after orthodontic treatment. Poor interradicular angulation at T1 and factors involving vertical facial growth leading to tooth eruption are associated with greater change. Despite angulation improvements on average, some patients did not experience favorable mesiodistal root angulation changes. Therefore, it is recommended that clinicians attempt to parallel roots during orthodontic treatment.
Author: Brett C. Alvey
Publisher:
ISBN:
Category : Molar
Languages : en
Pages : 25
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Book Description
Introduction: Proper root parallelism is an important goal of orthodontic treatment that allows for the best possible functional and esthetic result. Maxillary lateral incisors and second molars are two common teeth for which practitioners fail to achieve acceptable root parallelism. The aim of this study was to investigate angulation changes that non-parallel roots of maxillary lateral incisors and second molars undergo after orthodontic treatment. Methods: Records of 68 patients with angled roots of interest were analyzed immediately following orthodontic treatment, T1 (average age 16.1 ± 3.7 years) and at long-term follow-up, T [subscript] Latest (15.4 ± 4.5 years). Panoramic radiographs were used to measure the mesiodistal angulations of roots at both time points. Dental casts, lateral cephalometric radiographs, and patient demographic information were used to analyze factors that could be associated with interradicular angulation changes occurring between T1 and T [subscript] Latest. Results: On average, lateral incisors uprighted 4.79 ± 3.23 degrees, and second molars uprighted 5.52 ± 5.33 degrees. Gender (male) and age at T1 were significantly associated with incisor uprighting. Interradicular angulation at T1 and increased facial height were significantly associated with uprighting of both incisor and molar roots. Conclusions: On average, non-parallel roots of maxillary lateral incisors and second molars tend to upright after orthodontic treatment. Poor interradicular angulation at T1 and factors involving vertical facial growth leading to tooth eruption are associated with greater change. Despite angulation improvements on average, some patients did not experience favorable mesiodistal root angulation changes. Therefore, it is recommended that clinicians attempt to parallel roots during orthodontic treatment.
Author: Long Dao Tieu
Publisher:
ISBN:
Category : Bone resorption
Languages : en
Pages : 110
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Book Description
When camouflaging Class II malocclusions, there are often changes to both the maxillary and mandibular incisor angulations that can lead to artificial elongation and/or foreshortening of the dental image. OIEARR is a common result of orthodontic treatment and given the inherent limitations of 2D radiography, it would be beneficial to better understand how changes of tooth angulation can alter the perceived root lengths. With this knowledge, clinicians may be better equipped at recognizing cases of true root resorption as opposed to cases where the appearance of root resorption on the radiograph is due to an imaging foreshortening. This information can help clinicians identify teeth that need further imaging (periapical) to confirm/assess severity of root resorption and will also allow clinicians to make modifications to their treatment in an attempt to minimize the progression of root resorption. Research Question 1. Critically evaluate incisor OIEARR in patients undergoing non-surgical treatment of Class II Division I malocclusion by systematic review of the published data. a.Current evidence suggests comprehensive orthodontic treatment to correct Class II malocclusion results in increased prevalence of OIEARR, however given the fact that there was no RCT and only limited prospective data included in this SR, the findings should be considered with caution. i.Prevalence ranged between 65.6%-98.1% ii.OIEARR -Per patient -- 65.6%-98.1% iii.OIEARR - Per tooth -- 72.9%-94.2% iv.Majority of teeth experienced mild-moderate resorption with severe resorption being reported to be between 6.25-17.2% v.No Sex difference was reported vi.No evidence that either the Mx CI or LI more susceptible to RR vii.Weak to moderate positive correlation between Tx duration and RR viii.Weak to moderate positive correlation between AP apical displacement and RR 2. What is the prevalence of OIEARR over the course of treatment in a selected sample of patients treated with either the X-bow for Forsus? a.Prevalence per tooth 65.3% b.Prevalence per patient 98.6% 3.What is the severity of OIEARR over the course of treatment in a selected sample of patients treated with either X-bow for Forsus? a.Per tooth -- None (34.7%); Mild (45.2%); Moderate (9.3%); Severe (11%) b.Per patient -- None (1.4%), Mild (32.9%); Moderate (30%); Severe (35.7%) 4.Are the incisor length measurements determined from panoramic radiographs accurate and reliable when maxillary and mandibular incisor angulations are modified in a custom made typodont? a.Under experimental conditions, Md incisors appear to respond as expected when compared to theoretical model (assumption -- teeth within focal trough) i.10 degrees -- 1.4% shorter ii.20 degrees -- 6.3% shorter iii. 30 degrees -- 13.4% shorter iv.40 degrees -- 23.7% shorter v.50 degrees -- 34.6% shorter b.Mx Incisors are more difficult to say. At some angulations yes (80, 90), at others (50,60, 70, 100, 110) the answer isn't clear c.Severe Resorption in clinical study was found in 11% of treated incisors and of the 25 patients with at least one tooth with severe RR, 20 of the cases were found on the Md arch 5. When several cephalometric variables are considered simulataneously over time, does sex and or treatment type affect the final outcome in a selected sample of patients treated with either X-bow or Forsus? a.No evidence of a Sex (p=0.840) difference in the overall pattern of cephalometric variables. b.No Evidence of a treatment type (p=0.395) difference in the overall pattern of cephalometric variables. c.Convincing evidence of a Time (p=0.006) difference in the overall pattern of cephalometric variables. d.Convincing evidence (p=0.019) that over the course of treatment OB was reduced by 1.79mm [1.66,1.92]. e.Convincing evidence (p=0.015) that over the course of treatment Y-Axis increased 1.3° [1.24,1.33]. 6.Additional Findings a.Shorter treatment length (p=0.037) with X-bow (24.18 months) compared to Forsus (30.17 months) b.Both compliance free Class II correction protocols (X-bow and Forsus) for the treatment of mild to moderate class II malocclusion appear to generate similar degrees of lower incisor proclination with similar variability. It appears than that foreshortening of the image on a panoramic radiograph due to proclination of lower incisors accounts for a small part, and the larger reason maybe due to the difficulties of accurately measuring the teeth due to distortion caused by the narrow focal trough size or superimposition.
Author: Young-Jin Kim
Publisher:
ISBN:
Category : Ethnic groups
Languages : en
Pages : 78
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Author: Martyn T. Cobourne
Publisher: Springer Nature
ISBN: 303157530X
Category :
Languages : en
Pages : 182
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Author: Peter W. Ngan
Publisher: Bentham Science Publishers
ISBN: 1608054918
Category : Medical
Languages : en
Pages : 474
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Book Description
"Orthodontic Treatment of Class III Malocclusion is a clinical textbook which highlights both research findings as well as clinical treatment of patients with Class III malocclusions. The volume equips readers with a critical review of present information about 1) the craniofacial biology behind various treatment strategies, 2) Diagnosis and treatment planning in both growing and non-growing Class III patients and 3) Contemporary orthodontic appliances using implants and miniscrews. The book is divided into sections proving evidence-based research on the following aspects of Class III malocclusions: the genetic and epigenetic factors contemporary diagnosis and treatment planning for patients early treatment of Class III problems treatment of Class III problems in the adolescents surgical treatment of adult Class III patients treatment of Class III problems in patients with craniofacial anomalies Orthodontic Treatment of Class III Malocclusion will empower clinicians with a sound knowledge about rationale for using certain treatment modalities and will help both general practitioners and specialists such as pediatric dentists and orthodontists to use this information for their daily practice."
Author: Edward Hartley Angle
Publisher:
ISBN:
Category : History
Languages : en
Pages : 124
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Book Description
The Angle System of Regulation and Retention of the Teeth, And Treatment of Fractures of the Maxillae by Edward Hartley Angle, first published in 1899, is a rare manuscript, the original residing in one of the great libraries of the world. This book is a reproduction of that original, which has been scanned and cleaned by state-of-the-art publishing tools for better readability and enhanced appreciation. Restoration Editors' mission is to bring long out of print manuscripts back to life. Some smudges, annotations or unclear text may still exist, due to permanent damage to the original work. We believe the literary significance of the text justifies offering this reproduction, allowing a new generation to appreciate it.
Author: Edward Hartley Angle
Publisher:
ISBN:
Category : Dentistry, Operative
Languages : en
Pages : 338
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Author: Monica Velez
Publisher:
ISBN:
Category :
Languages : en
Pages : 296
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Author: Glenn T. Sameshima
Publisher: Springer Nature
ISBN: 3030587061
Category : Medical
Languages : en
Pages : 142
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Book Description
This book is exceptional in being dedicated solely to root resorption caused by orthodontic tooth movement. While the core content is based on scientific evidence, the book is intended as a practical aid for the clinician who performs orthodontics. After explanation of the different types of root resorption, a series of clinically oriented chapters focus particularly on external apical root resorption. Readers will find clear guidance on etiology, risk factors, diagnosis, imaging, patient management and education, and treatment options. The long-term prognosis of teeth with resorbed roots is thoroughly discussed, and advice is provided on the measures that should be adopted if severe root resorption is encountered during or at the end of treatment. Valuable information is also presented on the practice management side of the problem, covering informed consent, record keeping, and documentation of risk. The closing chapter examines likely future directions in root resorption management. The principal author has lectured and published on the subject for more than 25 years and is internationally recognized as a leading authority. This is the FIRST book solely dedicated to orthodontic root resorption!
Author: Hernando De Castro
Publisher:
ISBN:
Category : Orthodontics
Languages : en
Pages : 150
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