scholarly journals Necessary diagnostic criteria of dental crowding in children during mixed dentition with different facial skeleton growth patterns

2021 ◽  
Vol 25 (4) ◽  
pp. 616-619
Author(s):  
K. G. Krymovskyi ◽  
O. A. Kaniura ◽  
T. M. Kostiuk
Keyword(s):  
Orthodontic Treatment ◽  
Neutral Type ◽  
Scientific Data ◽  
Growth Patterns ◽  
Mixed Dentition ◽  
Facial Skeleton ◽  
Pharyngeal Airway ◽  
Computed Tomography Images ◽  
Severe Degree ◽  
Dental Crowding

Annotation. Pathology of dental crowding during mixed dentition is one of the most common and difficult in the practice of dentist-orthodontist. Its prevalence, according to modern scientific data reaches 77% and occurs in all pathologies of occlusion (malocclusions). The aim of our study is to establish the relationship between the formation of dental crowding and the growth patterns of facial skeleton during mixed dentition in order to improve the effectiveness of orthodontic treatment. We used 42 pairs of plaster models and 42 slices of cone-beam computed tomography images (CBCT) for patients aged 7 to 11 years. Randomization of patients into study groups was performed according to the facial skeleton growth patterns and the Little index value. The analysis was performed by the method of variation statistics taking into account the mean values (mode, median, arithmetic mean) and mean error (M) with the assessment of reliable values by Student’s t-test, as well as determining the correlation coefficient using the Pearson pairwise method to detect connections between the obtained indicators at the minimum probability threshold p<0.05 using the statistical package EZR v. 1.35. According to the results of the examined patients: 30 people (71.4%) had a severe degree of dental crowding on both maxilla and mandible (LII> 8 mm.), more often it was associated with the neutral type of growth – 82% (with vertical – 60%). Statistically significant correlations were found between severe degree of dental crowding and vertical and neutral facial skeleton growth patterns (p<0.05). The results of the CBCT study showed that narrowing of the upper pharyngeal airway (UP) according to McNamara was more common in patients with neutral (85%) and vertical (80%) growth patterns with skeletal II and I class malocclusions according to Engle, which were 55% and 35%, respectively. The study revealed that the vast majority of children with dental crowding with different facial skeleton growth patterns had clinically significant disorders of the development of both maxillary and mandibular apical bases and airways which required immediate interceptive orthodontic treatment.

scholarly journals Implications of Permanent Teeth Dimensions and Arch Lengths on Dental Crowding during the Mixed Dentition Period

2021 ◽  
Vol 11 (17) ◽  
pp. 8004
Author(s):  
Raisa Daoud ◽  
Maria-Angelica Bencze ◽  
Cristina-Crenguța Albu ◽  
Elina Teodorescu ◽  
Anca-Oana Dragomirescu ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Cross Sectional Study ◽  
Mixed Dentition ◽  
Class I ◽  
Common Reason ◽  
Permanent Teeth ◽  
Sectional Study ◽  
Cross Sectional ◽  
Length Measurements ◽  
Dental Crowding

Dento-alveolar disharmony with crowding is a common reason for orthodontic treatment with not fully understood or unequivocally demonstrated causes. This study investigated the correlations between teeth dimensions, arch lengths, and crowding during the mixed dentition period. A cross-sectional study on 100 dental casts of patients with class I malocclusions was performed. Dental arches were classified as non-crowded, moderately crowded, severely crowded, and spaced. The mesio-distal widths, bucco-lingual sizes, and crown proportions of permanent teeth were assessed. The results indicated that arch length measurements showed smaller values in crowded arches. The mesio-distal dimensions of upper central incisors and lower lateral incisors were larger in patients with crowding. The bucco-lingual dimensions of upper incisors were decreased, the bucco-lingual dimensions of lower central incisors and permanent first molars were increased in crowded arches. Upper incisors and lower lateral incisors presented larger crown proportions in crowding cases. Low negative correlations were found between mesio-distal diameters of maxillary central incisors, lower lateral incisors, lower permanent first molars, and the values of arch space discrepancies. In conclusion, crowding in the mixed dentition could be associated with reduced arch lengths, increase in mesio-distal sizes of incisors and lower permanent first molars, and variations of bucco-lingual dimensions and crown proportions of incisors and lower permanent first molars.

scholarly journals DISTAL OCCLUSION AND DENTAL CROWDING: TREATMENT STRATEGY

2020 ◽  
pp. 103-108
Author(s):  
L.V. Smagliuk ◽  
M.I. Dmytrenko
Keyword(s):  
Risk Factors ◽  
Orthodontic Treatment ◽  
Physiological State ◽  
Mixed Dentition ◽  
Pathological State ◽  
Upper Respiratory Tract ◽  
Periodontal Tissues ◽  
Tract Infections ◽  
Dental Crowding ◽  
Distal Occlusion

Dental anomalies are the leading ones among dental diseases in the period of mixed (79,96%) and permanent (84,33%) dentition. According to the results of our studies, frequency of distal occlusion (up to 40%) and dental crowding (up to 65%) are the largest in structure of orthodontic pathology. The aim of the study is to analyze and summarize knowledge about ways of enhancement of treatment and prophylaxis efficiency in patients with distal occlusion and dental crowding. Genetic predisposition, early childhood diseases (including upper respiratory tract infections), children's bad habits, pathological state of teeth (adentia, impaction, micro-, macrodentia), micro-, macrognathia, functional disorders of maxillofacial area contribute a high percentage in structure of "risk factors" which lead to formation of distal occlusion with dental crowding. For each particular patient distal occlusion, complicated by dental crowding, is formed under the influence of combination of several "risk factors", where the first place belongs to disturbances of dental area: breathing, closing of lips, swallowing, chewing, speech. Today it is well known that the first step in correction of distal occlusion of dentitions is to evaluate the patient's potential growth. Treatment in the period of mixed dentition is important with relation to protection of palate from trauma by mandibular incisors with a large sagittal gap, prophylaxis of dysfunction of temporomandibular joint, psychological rehabilitation of children during speech formation, as well as to improve the prognosis of treatment in older age. The best period of treatment is a peak of growth and development. Growth is the most important factor in planning treatment of distal occlusion, since dramatic changes in correction are related to growth rather than teeth movement. Orthodontists forbear from recommendations for teeth extraction in growing patients, as they believe that it leads to worsening of face profile and does not allow to achieve optimal relationships of jaw and occlusion. In adult patients, complete conservative correction of distal occlusion is possible only in the absence of skeletal disorders. Combined method, namely combination of orthodontic treatment and orthognathic surgery, is an alternative for adults treatment. Adequate individual approach to orthodontic treatment in patients with distal occlusion complicated by dental crowding is based on a comprehensive clinical examination, scientific analysis and results interpretation of additional examination methods. Full functional occlusion is possible if all elements of dentition: occlusion, periodontal tissues, temporomandibular joints, muscles and nervous system, are considered. Stable results and positive prognosis are provided by normalization of physiological state of masticatory and mimic muscles.

scholarly journals Changes in the Upper and Lower Pharyngeal Airway Spaces Associated with Rapid Maxillary Expansion

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Fitin Aloufi ◽  
Charles B. Preston ◽  
Khalid H. Zawawi
Keyword(s):  
Orthodontic Treatment ◽  
Upper Airway ◽  
Rapid Maxillary Expansion ◽  
Lower Airway ◽  
Control Group ◽  
Maxillary Expansion ◽  
Pharyngeal Airway ◽  
Significant Difference ◽  
And Gender ◽  
Maxillary Constriction

Objectives. The primary objectives of this retrospective study were first to compare the upper and lower pharyngeal airway spaces between orthodontic patients with and without maxillary constriction and second to evaluate the effect of rapid maxillary expansion (RME) on these airway spaces. A secondary objective was to compare the mode of breathing between groups. Materials and Methods. The experimental (RME) group consisted of 30 patients (mean age, years, 16 boys and 14 girls) with maxillary constriction who were treated with hyrax-type RME. The control group comprised the records of age- and gender matched patients (mean age, years, 16 boys and 14 girls) with no maxillary constriction but requiring nonextraction comprehensive orthodontic treatment. Cephalometric measurements in the sagittal dimension of upper and lower airway spaces for the initial and final records were recorded. Mode of breathing and length of treatment were also compared. Results. The sagittal dimension of the upper airway increased significantly in the RME group ( mm) compared to the control group ( mm), . However, there was no significant difference in the lower pharyngeal airway measurement between the RME group () and the control group (), . There was no significant difference with respect to mode of breathing between the two groups (). Conclusion. Rapid maxillary expansion (RME) during orthodontic treatment may have a positive effect on the upper pharyngeal airway, with no significant change on the lower pharyngeal airway.

Suffocated Maxillary Central Incisors (Surgical and Orthodontic Management): A Report of Two Cases

2021 ◽  
Vol 11 (1) ◽  
pp. 55-60
Author(s):  
Barun Kumar Sah ◽  
Jamal Giri ◽  
Bandana Koirala ◽  
Mamta Dali ◽  
Sneha Shrestha
Keyword(s):  
Orthodontic Treatment ◽  
Treatment Options ◽  
Self Esteem ◽  
Permanent Tooth ◽  
Mixed Dentition ◽  
Dental Practice ◽  
Central Incisor ◽  
Supernumerary Teeth ◽  
Multiple Treatment ◽  
Maxillary Incisors

Clinically, supernumerary teeth are able to cause different local disorders and the most common one is impaction of maxillary incisors. Impacted maxillary incisors substantially affect esthetics, function, and self‑esteem of patients. Impaction of maxillary permanent incisor is a rare clinical entity in dental practice. Although impaction of a permanent tooth is rarely diagnosed during the mixed dentition period, an impacted central incisor is usually diagnosed accurately when there is delay in the eruption of tooth. Multiple treatment options are available for impacted incisors. Surgical-orthodontic treatment is one of the alternative option for the correction. Early diagnosis and management of supernumer¬ary teeth is important to prevent the need for more complex surgical and orthodontic treatment. Here, we present a report of two cases of impacted maxillary incisors and its management

scholarly journals Early management of class II division 2 malocclusion. Literature review

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
Carolina Rodríguez-Manjarrés ◽  
Margarita-Rosa Padilla-Tello
Keyword(s):  
Treatment Options ◽  
Relevant Information ◽  
Class Ii ◽  
Mixed Dentition ◽  
Mandibular Advancement ◽  
Maxillary Expansion ◽  
Early Management ◽  
Mandibular Retrognathism ◽  
Dental Crowding ◽  
Division 2

This paper presents the most relevant information about the class II division 2 malocclusion (II / 2) described in the literature and different treatment options based on orthopedics. Class II malocclusion is characterized by mandibular retrognathism and / or prognathic maxillary which could affect the molar relationship and considering the dental component is subdivided into Type 1, characterized by vestibular inclination of all upper incisors and Type 2 with upper central incisors retroclined and vestibularized lateral incisors. It presents multifactorial etiology. As reported by the literature, the incidence of malocclusion Class II / 2 ranges from 3-12%. It is characterized by different vertical, transverse, facial, skeletal and dental features that differentiate it from other malocclusions, and thus make decisions on time. Therefore, early treatment of this type of malocclusion, can reduce the possibility of surgery, minimizec the severity of the alteration in stomatological system functions and improve the overall appearance of the patient. The goals of treatment are directed transversely performing maxillary expansion to allow correction in alteration of the axial inclination of the upper incisors and solve dental crowding, leading to a malocclusion class II / 1, for further mandibular advancement. Keywords: Malocclusion, Class II Division 2, mixed dentition, functional orthopedics of the jaws.

The Impacts and Outcomes of Presurgical Nasoalveolar Molding (PNAM) in Newborn Sequential Therapeutic Implementation

2021 ◽  
Author(s):  
Vonda Trivosa
Keyword(s):  
Incidence Rate ◽  
Rural Areas ◽  
Orthodontic Treatment ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Mixed Dentition ◽  
Deciduous Dentition ◽  
Parents And Children ◽  
Nasoalveolar Molding

Cleft lip and palate is a common congenital malformation in the oral and maxillofacial regions. According to epidemiological investigation, the incidence rate is about 1.625%, and the incidence rate is high in poor areas and rural areas. Cleft lip and palate mainly involve the upper lip, hard palate, soft palate and nose, which can damage the appearance of children, affect pronunciation, swallowing and chewing, and also bring different degrees of psychological damage to children in the growth stage. Therefore, we should actively carry out sequential treatment and participate in the treatment work through multi-disciplines. Based on restoring the oral and maxillofacial function and health of children, we should also pay attention to their aesthetic needs, enhance the treatment confidence of parents and children, and lay the foundation for the follow-up repair treatment. Most patients with cleft lip and palate are complicated with malocclusion. Orthodontic treatment is an important part of the treatment of cleft lip and palate. The orthodontic treatment of cleft lip and palate can be divided into five periods: newborn period, deciduous dentition period, mixed dentition period, permanent dentition period and combined orthodontic and orthognathic treatment period. Presurgicalnasoalveolar molding (PNAM) was used to reduce the severity of facial deformity in children with cleft lip and palate. This article discusses the therapeutic effect of newborn PNAM according to clinical cases. Objective to study the opportunity and current situation of PNAM in the treatment of children with cleft lip and palate, and to provide a favorable reference for clinical orthodontists, emphasizing the close communication between various disciplines.

scholarly journals Tissue-scale, personalized modeling and simulation of prostate cancer growth

2016 ◽  
Vol 113 (48) ◽  
pp. E7663-E7671 ◽  
Author(s):  
Guillermo Lorenzo ◽  
Michael A. Scott ◽  
Kevin Tew ◽  
Thomas J. R. Hughes ◽  
Yongjie Jessica Zhang ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Tumor Growth ◽  
Modeling And Simulation ◽  
Specific Antigen ◽  
Growth Patterns ◽  
Diffusion Reaction ◽  
Patient Specific ◽  
Cancer Growth ◽  
Major Health Problem ◽  
Computed Tomography Images

Recently, mathematical modeling and simulation of diseases and their treatments have enabled the prediction of clinical outcomes and the design of optimal therapies on a personalized (i.e., patient-specific) basis. This new trend in medical research has been termed “predictive medicine.” Prostate cancer (PCa) is a major health problem and an ideal candidate to explore tissue-scale, personalized modeling of cancer growth for two main reasons: First, it is a small organ, and, second, tumor growth can be estimated by measuring serum prostate-specific antigen (PSA, a PCa biomarker in blood), which may enable in vivo validation. In this paper, we present a simple continuous model that reproduces the growth patterns of PCa. We use the phase-field method to account for the transformation of healthy cells to cancer cells and use diffusion−reaction equations to compute nutrient consumption and PSA production. To accurately and efficiently compute tumor growth, our simulations leverage isogeometric analysis (IGA). Our model is shown to reproduce a known shape instability from a spheroidal pattern to fingered growth. Results of our computations indicate that such shift is a tumor response to escape starvation, hypoxia, and, eventually, necrosis. Thus, branching enables the tumor to minimize the distance from inner cells to external nutrients, contributing to cancer survival and further development. We have also used our model to perform tissue-scale, personalized simulation of a PCa patient, based on prostatic anatomy extracted from computed tomography images. This simulation shows tumor progression similar to that seen in clinical practice.

A Survey of Orthodontic Treatment in Team Care for Patients With Syndromic Craniosynostosis in Japan

2018 ◽  
Vol 55 (4) ◽  
pp. 479-486 ◽  
Author(s):  
Takafumi Susami ◽  
Toshihiko Fukawa ◽  
Haruyo Miyazaki ◽  
Teruo Sakamoto ◽  
Tadashi Morishita ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Tooth Extraction ◽  
Mixed Dentition ◽  
Actual Condition ◽  
Maxillary Expansion ◽  
Team Care ◽  
Syndromic Craniosynostosis ◽  
Maxillary Molars ◽  
Risk Of Injury ◽  
Surgery First

Objective: To understand the actual condition of orthodontic treatment in team care for patients with syndromic craniosynostosis (SCS) in Japan. Design: A nationwide collaborative survey. Setting: Twenty-four orthodontic clinics in Japan. Patients: A total of 246 patients with SCS. Main Outcome Measure: Treatment history was examined based on orthodontic records using common survey sheets. Results: Most patients first visited the orthodontic clinic in the deciduous or mixed dentition phase. Midface advancement was performed without visiting the orthodontic clinic in about a quarter of the patients, and more than a half of the patients underwent “surgery-first” midface advancement. First-phase orthodontic treatment was carried out in about a half of the patients, and maxillary expansion and protraction were performed. Tooth extraction was required in about two-thirds of patients, and the extraction of maxillary teeth was required in most patients. Tooth abnormalities were found in 37.8% of patients, and abnormalities of maxillary molars were frequently (58.3%) found in patients who had undergone midface surgery below the age of 6 years. Conclusions: Many patients underwent “surgery-first” midface advancement, and visiting the orthodontic clinic at least before advancement was considered desirable. First-phase orthodontic treatment should be performed considering the burden of care. Midface advancement below the age of 6 years had a high risk of injury to the maxillary molars. This survey is considered useful for improving orthodontic treatment in team care of patients with SCS.

scholarly journals Interceptive Orthodontics with Resin Turbos for Pseudo-Class III Malocclusions

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Neal D. Kravitz
Keyword(s):  
Orthodontic Treatment ◽  
Gingival Recession ◽  
Mixed Dentition ◽  
Gingival Tissue ◽  
Common Finding ◽  
Orthodontic Appliances ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Practical Implications ◽  
Mandibular Incisors

Background and Overview. Lingual eruption of the permanent maxillary central incisors in the early mixed dentition can result in a traumatic anterior crossbite, causing mobility and gingival recession to the opposing mandibular incisors.Case Description. This case report presents a common finding of a 7-year-old boy with a dental crossbite and pseudo-Class III malocclusion caused by lingual eruption of the maxillary central incisors. An interceptive phase of orthodontic treatment was provided by bonding a beveled resin turbo on the mandibular incisors. The crossbite was corrected in 3 months without any orthodontic appliances. In the absence of the traumatic occlusion, the mandibular incisors stabilized and the gingival tissue was expected to regenerate.Conclusions and Practical Implications. Dentists and orthodontists can place beveled resin turbos on the mandibular incisors to jump an anterior dental crossbite conservatively, without the use of orthodontic brackets and wires.

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