scholarly journals TREATMENT MANAGEMENT OF PATIENTS WITH MANDIBULAR MICROGNATHIA AND RETROGNATHISM IN INCOMPLETED FACIAL SKELETON GROWTH PERIOD

2019 ◽  
Vol 15 (3) ◽  
pp. 103-109
Author(s):  
Ольга Меграбян ◽  
Olga Megrabyan ◽  
Павел Ишмурзин ◽  
Pavel Ishmurzin
Keyword(s):  
Orthodontic Treatment ◽  
Treatment Effectiveness ◽  
Growth Period ◽  
Symptomatic Treatment ◽  
Maturation Stage ◽  
Facial Skeleton ◽  
Study Results ◽  
Lateral Cephalograms ◽  
Cervical Vertebral Maturation ◽  
Distal Occlusion

Importance. The choice of management and orthodontic appliance construction is fundamental in planning and treatment of patients with mandibular micrognathia and/ or retrognathism. The aim ― is evaluation of treatment effectiveness of patients with mandibular micrognathia and/ or retrognathism in incompleted facial skeleton growth period. Methodoloty. Base of the research was Children dentistry and orthodontics department of E.A. Vagner Perm State Medical University. The object of the research is 98 patients aged from 5,5 to 16 (42 girls and 56 boys) with distal occlusion and mandibular micrognathia and/ or retrognathism. Data for study were lateral cephalograms, profile images, clinical study results before and after orthodontic treatment. Results. It was determined that the largest increase in mandible size and its position normalization is observed in the treatment of patients with CS2, CS3 cervical vertebral maturation stages. In patients with CS5 cervical vertebral maturation stage and overjet more than 6 mm we use a symptomatic treatment principle for distal occlusion correction. Results application area ― orthodontists practice. Conclusions. This data may be used in prognosis of orthodontic treatment outcome and retentional period in patients with distal occlusion.

Modern trends in the choice of tactic and method for the treatment of growing patients with distal occlusion (literature review)

2020 ◽  
Vol 20 (2) ◽  
pp. 156-159
Author(s):  
F. S. Ayupova ◽  
R. A. Khotko
Keyword(s):  
Orthodontic Treatment ◽  
Sagittal Plane ◽  
Cervical Vertebrae ◽  
Individual Characteristics ◽  
Facial Skeleton ◽  
Potential Growth ◽  
Determining Factors ◽  
Distal Occlusion ◽  
Methods Of Treatment

Relevance. According to the latest data the distal occlusion of the dentition is considered first in the structure of dental anomalies on the sagittal plane reaching 40-45% of the total number of deformations of the dental system.Purpose. Study of information about management and methods of treatment and intended indications for their use in patients with distal occlusion in different periods of bite formation.Materials and methods. We studied the publications of recent years by both Russian and foreign authors which were devoted to the choice of management and methods of treatment of growing patients with distal occlusion.Results. The variability in the manifestations of distal occlusion indicates the urgency of improving the management and methods of orthodontic treatment in patients with this pathology. In this case the determining factors are the severity of the pathology and the age of the patient. It is considered that the potential growth of the dento-maxillofacial area of the patient should be determined according to its individual characteristics. They are based on the stage of formation of the cervical vertebrae. It is noted that treatment during the second dentition has significant effects which are associated with the possibility of modifying the growth of the dental complex. This allows you to achieve a stable result in the long term.Conclusions. Different opinions of specialists determine the relevance of further study of methods of orthodontic treatment and analysis of the efficiency of their application, the necessity to improve the tactics of comprehensive rehabilitation of patients with distal occlusion during the formation of the bite taking into account the direction of the type of growth of the facial skeleton in growing patients.

scholarly journals Morphological changes of the anterior alveolar bone due to retraction of anterior teeth: a retrospective study

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Qiannan Sun ◽  
Wenhsuan Lu ◽  
Yunfan Zhang ◽  
Liying Peng ◽  
Si Chen ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Alveolar Bone ◽  
Morphological Changes ◽  
Strong Positive Correlation ◽  
Anterior Teeth ◽  
Bone Width ◽  
Lateral Cephalograms ◽  
Labial Side ◽  
Incisor Retraction ◽  
Maxilla And Mandible

Abstract Backgroud To analyze the morphological changes of the anterior alveolar bone after the retraction of incisors in premolar extraction cases and the relationship between incisor retraction and remodeling of the alveolar base represented by points A and B displacements. Methods Pre- (T0) and post-treatment (T1) lateral cephalograms of 308 subjects in the maxilla and 154 subjects in the mandible who underwent the orthodontic treatment with extraction of 2 premolars in upper or lower arches were included. Alveolar bone width and height in both the maxillary and mandible incisor area were measured at T0 and T1 respectively. By superimposing the T0 and T1 cephalometric tracings, changes of points A and B, and the movement of the incisors were also measured. Then the correlation between incisor movement and the displacements of points A and B was analyzed. Results The alveolar bone width (ABW) showed a significant decrease in both maxilla and mandible (P < 0.001) except the labial side of the mandible (P > 0.05). The alveolar bone height (ABH) showed a significant increase in the labial side of maxilla and a significant decrease in the lingual side of maxilla and mandible. A strong positive correlation was verified between incisor movement and position changes of points A and B in both horizontal and vertical directions. Conclusions Anterior alveolar bone width and height generally decreased after orthodontic treatment. Incisor retraction led to significant position changes of points A and B. The decrease of anterior alveolar bone due to significant incisor retraction should be taken into account in treatment planning.

scholarly journals Predisposing factors to severe external root resorption associated to orthodontic treatment

2013 ◽  
Vol 18 (1) ◽  
pp. 110-120 ◽  
Author(s):  
Gracemia Vasconcelos Picanço ◽  
Karina Maria Salvatore de Freitas ◽  
Rodrigo Hermont Cançado ◽  
Fabricio Pinelli Valarelli ◽  
Paulo Roberto Barroso Picanço ◽  
...  
Keyword(s):  
Root Length ◽  
Orthodontic Treatment ◽  
Alveolar Bone ◽  
Root Resorption ◽  
Treatment Time ◽  
Predisposing Factors ◽  
Crown Root ◽  
External Root Resorption ◽  
Lateral Cephalograms ◽  
Maxillary Incisors

OBJECTIVE: The aim of this study was to evaluate predisposing factors among patients who developed moderate or severe external root resorption (Malmgren's grades 3 and 4), on the maxillary incisors, during fixed orthodontic treatment in the permanent dentition. METHODS: Ninety-nine patients who underwent orthodontic treatment with fixed edgewise appliances were selected. Patients were divided into two groups: G1 - 50 patients with no root resorption or presenting only apical irregularities (Malmgren's grades 0 and 1) at the end of the treatment, with mean initial age of 16.79 years and mean treatment time of 3.21 years; G2 - 49 patients presenting moderate or severe root resorption (Malmgren's grades 3 and 4) at the end of treatment on the maxillary incisors, with mean initial age of 19.92 years and mean treatment time of 3.98 years. Periapical radiographs and lateral cephalograms were evaluated. Factors that could influence the occurrence of severe root resorption were also recorded. Statistical analysis included chi-square tests, Fisher's exact test and independent t tests. RESULTS: The results demonstrated significant difference between the groups for the variables: Extractions, initial degree of root resorption, root length and crown/root ratio at the beginning, and cortical thickness of the alveolar bone. CONCLUSION: It can be concluded that: Presence of root resorption before the beginning of treatment, extractions, reduced root length, decreased crown/root ratio and thin alveolar bone represent risk factors for severe root resorption in maxillary incisors during orthodontic treatment.

Augmenting Communicative Interaction Between Handicapped and Nonhandicapped Preschool Children

1987 ◽  
Vol 52 (3) ◽  
pp. 200-211 ◽  
Author(s):  
Howard Goldstein ◽  
Dianne Raeke Ferrell
Keyword(s):  
Treatment Effectiveness ◽  
Free Play ◽  
Strategy Use ◽  
Multiple Baseline ◽  
Communicative Interaction ◽  
Handicapped Children ◽  
Baseline Design ◽  
Study Results ◽  
Peer Intervention ◽  
Initial Intervention

A peer-mediated intervention designed to promote communicative interaction by 3 handicapped children with behavioral, social, and communicative deficits in an integrated preschool was evaluated. All 6 normally developing preschoolers in the class were taught facilitative strategies. A multiple baseline design across subjects was used in combination with withdrawal designs for 2 of the subjects. Significant increases in communicative interaction occurred when the peers were prompted to use the strategies with the 3 handicapped classmates. In particular, increases in the handicapped children's response rates were demonstrated during free play observations. In addition, fewer initiations by the handicapped children during the peer intervention was shown to be attributable to reductions in teacher prompting. Generalization to other settings was demonstrated by 1 subject. Although most strategy use by peers was prompted during the initial intervention phases, prompting dropped gradually while peer strategy use was maintained by the end of the study. Results of this study have implications for refining our ability to tailor interventions individually to improve treatment effectiveness based upon the characteristics of handicapped children.

scholarly journals Sensitivity and Specificity of Mandibular Third Molar Calcification at Chronological Age and Hand Wrist Maturation Stage to Discriminate Between Female and Male at Pubertal Growth Period

2021 ◽  
Vol 15 (1) ◽  
pp. 551-557
Author(s):  
Endah Mardiati ◽  
Ira Komara ◽  
Himawan Halim ◽  
Dikdik Kurnia ◽  
Ani Melani Maskoen
Keyword(s):  
Sensitivity And Specificity ◽  
Third Molar ◽  
Growth Period ◽  
Chronological Age ◽  
Maturation Stage ◽  
Cross Sectional ◽  
Pubertal Growth ◽  
Mandibular Third Molar ◽  
Significant Difference ◽  
Stage D

Background: The mandibular third molar is the last tooth that is not completely developed by the time pubertal growth has been finished. Maturation of the mandibular third molar is one of the physiological maturation indicators that can be used to determine the stage of pubertal growth. Objective: The aim of the study was to determine the sensitivity and specificity of mandibular third molar calcification at chronological age and hand wrist maturation stage to discriminate between female and male at pubertal growth period. Methods: It is a retrospective study with a cross-sectional approach using panoramic and hand-wrist digital radiographs of 279 females and 144 males, age 8-17 years, with a total of 423 panoramic radiographs and 423 hand-wrist radiographs. Statistical analysis was performed using Excel Mega Stat. ANOVA to analyze the differences between mandibular third molar calcification at chronological age and hand-wrist maturation stage, and t-test was used to analyze the differences between females and males. Spearman rank correlation was used for the analysis of the correlation between mandibular third molar calcification with chronological age and hand-wrist maturation stage; sensitivity and specificity were used to discriminate the pubertal growth period between mandibular third molar calcification and hand-wrist maturation stage. Results: There were significant differences found in mandibular third molar crown maturation stage B and C, but no significant difference was observed between mandibular third molar stage A, D, E, F, G and H, between females and males. The highest percentage of mandibular third molar crown formation in females was observed at stage D (6.68%) at MP3u, and in males, it was observed at stage D (8.83%) at SMI-4. The highest percentage of root formation in females was stage E (8.24%) at the SMI-10 stage, and males stage F (4.86%) at MP3u. The correlation was observed between mandibular third molar calcification with hand-wrist, females 0.22 and males 0.43, and chronological age 0.60 for females and 0.69 for males. The highest sensitivity of mandibular third molar calcification of 97.0% was observed in female at SMI-4 of hand-wrist maturation with specificity of 100%, while in male, a sensitivity of 94.5% was observed at SMI-2 stage with a specificity of 99.99%. Conclusion: There were significant differences found in mandibular third molar calcification between females and males except for stage B and stage C; weak correlation was observed between mandibular third molar calcification and hand-wrist, and moderate correlation was observed with chronological age. The sensitivity and specificity in females and males indicate that mandibular third molar calcification is only useful for diagnosing the pre-pubertal growth phase.

scholarly journals Maxillomandibular Plane Angle Bisector (MM) Adjunctive to Occlusal Plane to evaluate Anteroposterior Measurement of Dental Base

2012 ◽  
Vol 13 (4) ◽  
pp. 539-544
Author(s):  
Chanamallappa R Ganiger ◽  
KU Cariappa ◽  
AR Yusuf Ahammed
Keyword(s):  
Clinical Significance ◽  
Orthodontic Treatment ◽  
Clinical Usefulness ◽  
Occlusal Plane ◽  
Reference Plane ◽  
Plane Angle ◽  
B Values ◽  
Angle Bisector ◽  
Lateral Cephalograms ◽  
Relationship Of

ABSTRACT Aim This study was undertaken to analyze the clinical usefulness of the maxillomandibular bisector, its reproducibility, its validity and its relationship to the functional occlusal plane, the bisecting occlusal plane and the nature of its cant. Materials and methods Thirty pretreatment lateral cephalograms, each of adolescents (above 18 years of age) and children (10- 12 years), seeking orthodontic treatment were randomly selected and the Wits technique of anteroposterior measurement was used to compare A-B values measured to the new plane with those measured to the functional occlusal plane (FOP) and to the traditional or bisecting occlusal plane (BOP). Results Present study showed that MM bisector plane is more reproducible and valid reference plane, than the FOP and BOP. Conclusion A new plane, geometrically derived from the dental base planes, has been tested as an occlusal plane substitute for the measurement of anteroposterior jaw relationships. It lies close to but at an angle and inferior to the traditional occlusal planes and is highly reproducible at all times. Clinical significance Maxillomandibular planes angle bisector may be a useful adjunct for the cephalometric assessment of sagittal relationship of the patient. How to cite this article Ganiger CR, Nayak USK, Cariappa KU, Ahammed ARY. Maxillomandibular Plane Angle Bisector (MM) Adjunctive to Occlusal Plane to evaluate Anteroposterior Measurement of Dental Base. J Contemp Dent Pract 2012; 13(4):539-544.

Dental and skeletal effects after total arch distalization using modified C-palatal plate on hypo- and hyperdivergent Class II malocclusions in adolescents

2020 ◽  
Author(s):  
Chang Yoon Jung ◽  
Jae Hyun Park ◽  
Ja Hyeong Ku ◽  
Nam-Ki Lee ◽  
Yoonji Kim ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Class Ii ◽  
Study Group ◽  
Class Ii Malocclusion ◽  
Plane Angle ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Palatal Plate ◽  
Skeletal Effects ◽  
Facial Types

ABSTRACT Objectives To compare the dental and skeletal treatment effects after total arch distalization using modified C-palatal plates (MCPPs) on adolescent patients with hypo- and hyperdivergent Class II malocclusion. Materials and Methods The study group included 40 patients with Class II malocclusion (18 boys and 22 girls, mean age = 12.2 ± 1.4 years) treated with MCPPs. Fixed orthodontic treatment started with the distalizing process in both groups. Participants were divided into hypo- or hyperdivergent groups based on their pretreatment Frankfort mandibular plane angle (FMA) ≤22° or ≥28°, respectively. Pre- and posttreatment lateral cephalograms were digitized, and 23 variables were measured and compared for both groups using paired and independent t-tests. Results The hyper- and hypodivergent groups showed 2.7 mm and 4.3 mm of first molar crown distalizing movement, respectively (P &lt; .001). The hypodivergent group had a slight 2.2° crown distal tipping of first molars compared with 0.3° in the hyperdivergent group. After distalization, the FMA increased 3.1° and 0.3°, in the hypodivergent and hyperdivergent groups, respectively (P &lt; .001). SNA decreased in the hypodivergent group, while other skeletal variables presented no statistically significant differences in the changes between the groups. Conclusions The hypodivergent group showed more distal and tipping movement of the maxillary first molar and increased FMA than the hyperdivergent group. Therefore, clinicians must consider vertical facial types when distalizing molars using MCPPs in Class II nonextraction treatment.

scholarly journals Apical root resorption during orthodontic treatment with aligners? A retrospective radiometric study

2013 ◽  
Vol 9 (1) ◽  
Author(s):  
Elena Krieger ◽  
Thomas Drechsler ◽  
Irene Schmidtmann ◽  
Collin Jacobs ◽  
Simeon Haag ◽  
...  
Keyword(s):  
Root Length ◽  
Orthodontic Treatment ◽  
Influence Factor ◽  
Root Resorption ◽  
Post Treatment ◽  
Anterior Crowding ◽  
Anterior Teeth ◽  
Lateral Cephalograms ◽  
Length Changes ◽  
Pre Treatment

Abstract Introduction Objective of this study was to investigate the incidence and severity of apical root resorptions (ARR) during orthodontic treatment with aligners. Materials and methods The sample comprised 100 patients (17–75 years of age) with a class I occlusion and anterior crowding before treatment, treated exclusively with aligners (Invisalign®, Align Technologies, Santa Clara, CA, USA). The following teeth were assessed: upper and lower anterior teeth and first molars. Root and crown lengths of a total of 1600 teeth were measured twice in pre- and post-treatment panoramic radiographs. Afterwards, relative changes of the root length during treatment were calculated by a root-crown-ratio taking pre- and post-treatment root and crown lengths into consideration. A reduction of this ratio was considered as a shortening of the initial root length. Additionally, tooth movements of the front teeth were assessed by lateral cephalograms and the 3-dimensonal set up of each patient. Results All patients had a reduction of the pre-treatment root length with a minimum of two teeth. On average 7.36 teeth per patient were affected. 54% of 1600 measured teeth showed no measurable root reduction. A reduction of >0%-10% of the pre-treatment root length was found in 27.75%, a distinct reduction of >10%-20% in 11.94%. 6.31% of all teeth were affected with a considerable reduction of >20%. We found no statistically significant correlation between relative root length changes and the individual tooth, gender, age or sagittal and vertical orthodontic tooth movement; except for extrusion of upper front teeth, which was considered as not clinical relevant due to the small amount of mean 4% ARR. Conclusions The present study is the first analyzing ARR in patients with a fully implemented orthodontic treatment with aligners (i.e. resolving anterior crowding). The variety was high and no clinical relevant influence factor could be detected. A minimum of two teeth with a root length reduction was found in every patient. On average, 7.36 teeth per patient were affected.

Physical and Mechanical Properties and Biological Resistance of the Calcareous Composites on Activated Mixing Water

2020 ◽  
Vol 1011 ◽  
pp. 151-157
Author(s):  
Sergey Khutorskoy ◽  
Denis Emelyanov ◽  
Alexander Matvievsky ◽  
Vasiliy Smirnov
Keyword(s):  
Mechanical Properties ◽  
Treatment Effectiveness ◽  
Physical And Mechanical Properties ◽  
Study Results ◽  
Slaked Lime ◽  
Water Activation ◽  
Biological Environment ◽  
Activation Conditions ◽  
Positive Effect ◽  
Mixing Water

The study results of the calcareous composites made with the use of activated mixing water are presented. Quicklime and slaked lime are used as lime binders. The mixing water was activated by the electric current and magnetic field in various modes. The effect of water activation on the physical and mechanical properties of slaked and quicklime composites and the resistance to the effects of the biological environment are studied. The water for mixing electromagnetic treatment effectiveness analysis is presented. The increase in the density of materials based on lime, trapped in activated water using ultrasound tests is proven. It was found that the mixing water activation affects the structure formation of composites and, under certain activation conditions, leads to an increase in such physical and mechanical parameters as strength and hardness. The positive effect of the mixing water activation on the lime-based materials’ resistance to microbial growth has been established, and the decrease in the growth of composites based on quicklime and slaked lime has been proved.

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