Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 29.375
Filtrar
1.
Am J Orthod Dentofacial Orthop ; 159(5): 627-634, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-33931222

RESUMO

INTRODUCTION: This study aimed to evaluate and compare the bridging and dimensions of the sella turcica and calcification of the ponticulus posticus in subjects with different dental anomalies. METHODS: Pretreatment records of orthodontic patients with palatally impacted canines (n = 95), mandibular second premolar agenesis (n = 45), maxillary lateral incisor agenesis (n = 75), tooth transpositions (TT, n = 25), peg-shaped maxillary lateral incisors (n = 30), and third molar agenesis (TMA, n = 145) were analyzed and compared with the control group (CG) consisting of 145 subjects with skeletal Class I malocclusion and no dental anomalies. The length, diameter, and depth of the sella turcica were calculated for each patient. The degree of sella turcica bridging was scored as type I, II, and III, whereas the extent of ponticulus posticus was classified as Class I, II, and III. RESULTS: Only decreases in the length and diameter of the sella turcica in subjects with TT were found to be statistically significant. Although type II bridging frequency was found to be significantly lower in subjects with mandibular second premolar agenesis, maxillary lateral incisor agenesis, TT, and TMA, type III bridging frequency was found to be significantly higher only in subjects with TMA. The decrease in Class I calcification frequencies and the increase in Class II calcification frequencies were found to be significant in subjects with palatally impacted canines, TT, and TMA compared with the CG. In addition, the presence of Class III calcification was found to be significantly more frequent in subjects with TMA than in the CG. CONCLUSIONS: Although type II and type III bridging frequencies were found to be higher than in previous studies because of the higher type II bridging frequency in the CG, type II bridging frequency was found to be insignificant. Furthermore, an increased frequency of ponticulus posticus calcification was observed in subjects with palatally impacted canines, TT, and TMA.


Assuntos
Atlas Cervical , Dente Impactado , Dente Pré-Molar , Cefalometria , Humanos , Sela Túrcica/diagnóstico por imagem , Dente Impactado/diagnóstico por imagem
2.
Prog Orthod ; 22(1): 12, 2021 May 03.
Artigo em Inglês | MEDLINE | ID: mdl-33937947

RESUMO

BACKGROUND: The purpose of this study was to compare the stress distribution and displacement patterns of the one versus two maxillary molars distalization with iPanda and to evaluate the biomechanical effect of distalization on the iPanda using the finite element method. METHODS: The finite element models of a maxillary arch with complete dentition, periodontal ligament, palatal and alveolar bone, and an iPanda connected to a pair of midpalatal miniscrews were created. Two models were created to simulate maxillary molar distalization. In the first model, the iPanda was connected to the second molar to simulate a single molar distalization. In the second model, the iPanda was connected to the first molar to simulate "en-masse" first and second molar distalization. A varying force from 50 to 200 g was applied. The stress distribution and displacement patterns were analyzed. RESULTS: For one molar, the stress was concentrated at the furcation and along the distal surface in all roots with a large amount of distalization and distobuccal crown tipping. For two molars, the stress in the first molar was 10 times higher than in the second molar with a great tendency for buccal tipping and a minimal amount of distalization. Moreover, the stress concentration on the distal miniscrew was six times higher than in the mesial miniscrew with an extrusive and intrusive vector, respectively. CONCLUSIONS: Individual molar distalization provides the most effective stress distribution and displacement patterns with reduced force levels. In contrast, the en-masse distalization of two molars results in increased force levels with undesirable effects in the transverse and vertical direction.


Assuntos
Má Oclusão de Angle Classe II , Desenho de Aparelho Ortodôntico , Cefalometria , Análise de Elementos Finitos , Humanos , Maxila , Dente Molar , Técnicas de Movimentação Dentária
6.
Shanghai Kou Qiang Yi Xue ; 30(1): 81-84, 2021 Feb.
Artigo em Chinês | MEDLINE | ID: mdl-33907785

RESUMO

PURPOSE: To investigate the effect of early correction with Twin-block appliance on soft and hard tissues of patients with Class Ⅱ skeletal malocclusion. METHODS: Sixty patients with Angle Class Ⅱ skeletal malocclusion were prospectively selected. The patients were divided into 2 groups, 30 cases in each group, by random number table method. Patients in the experimental group were treated with a Twin-block appliance combined with straight wire appliance, while patients in the control group were treated with a straight wire appliance. The soft and hard tissue indexes(SNA, SNB, ANB, U1-NA angle, U1-NA distance, L1-NB distance, L1-NB angle, U1-L1) before, and 12 months after treatment were measured. Soft tissue measurement indicators included UL-U1, LL-L1, over jet, overbite, E-upper-lip from the upper lip to the E-line, and the lower lip to the E-line, changes in the vertical distance (E-lower-lip), the dip angle of the sulcus, and the thickness of the soft tissue. SPSS 25.0 software package was used for statistical analysis of the data. RESULTS: U1-NA, U1-NA, L1-NB, L1-NB, overjet, overbite, E-upper-lip, and E-lower-lip were significantly less than the control group at 12 months and 36 months after treatment in the experimental group(P<0.05). U1-L1, nasolabial angle, sulcus angle, and soft tissue thickness of the experimental group were significantly greater than those of the control group(P<0.05). CONCLUSIONS: Twin-block appliance combined with straight wire appliance can significantly improve the relationship between the jaw and the soft and hard tissues of patients with Class Ⅱ skeletal malocclusion, and the long-term effect is good.


Assuntos
Má Oclusão de Angle Classe II , Má Oclusão , Sobremordida , Cefalometria , Humanos , Má Oclusão de Angle Classe II/terapia , Mandíbula
7.
Orthod Fr ; 92(1): 17-28, 2021 Mar 01.
Artigo em Francês | MEDLINE | ID: mdl-33871368

RESUMO

The aesthetic and functional success of mandibular advancement surgery often depends on the quality of the orthodontic preparation that preceded it. In order to be optimal, this preparation must try to reproduce a class II malocclusion equivalent to the sagittal skeletal discrepancy, to allow a surgical procedure of sufficient amplitude. The aim of this article is to present, thanks to a clinical case, a new mandibular posterior anchorage device, called Abalakov, used in the context of these preparations. The modalities of placement and use of this simple osteosynthesis wire, placed in the anterior part of the ramus, are exposed step by step, until the final result is obtained. The advantages and effectiveness of the technique are then discussed and compared with other treatment alternatives. It can be concluded that this new device is a simple, comfortable, inexpensive and above all reproducible and highly effective means of distalization of the mandibular arch, with clear uprighting of the incisors.


Assuntos
Má Oclusão de Angle Classe II , Procedimentos de Ancoragem Ortodôntica , Cefalometria , Estética Dentária , Humanos , Incisivo , Má Oclusão de Angle Classe II/terapia , Mandíbula
8.
Stomatologiia (Mosk) ; 100(2): 64-72, 2021.
Artigo em Russo | MEDLINE | ID: mdl-33874664

RESUMO

The aim of this study is to develop algorithms for the treatment of patients with class II malocclusion and incisor protrusion using the combination of bracket system, functional fixed telescopic appliance (FFTA) and skeletal anchorage, which allows to achieve effective dentoalveolar compensation of skeletal forms of class II malocclusion. MATERIALS AND METHODS: Orthodontic treatment of 60 patients with class II malocclusion at the age of 18 to 44 years, using the bracket system, FFTA and orthodontic miniscrews was performed. In order to assess the results of treatment, cone-beam computed tomography were obtained at the beginning and at the end of treatment. RESULTS: As a result of the treatment normalization of lower jaw position, dental position and occlusion were achieved, the lower incisors protrusion was eliminated and the facial profile was improved, reliably confirmed by lateral cephalograms. CONCLUSION: The proposed treatment algorithm proved to be effective for stable correction of skeletal class II malocclusion in patients rejecting orthognathic surgery.


Assuntos
Má Oclusão de Angle Classe II , Cirurgia Ortognática , Adolescente , Adulto , Algoritmos , Cefalometria , Humanos , Má Oclusão de Angle Classe II/diagnóstico por imagem , Má Oclusão de Angle Classe II/cirurgia , Mandíbula/diagnóstico por imagem , Mandíbula/cirurgia , Adulto Jovem
9.
Stomatologiia (Mosk) ; 100(2): 90-96, 2021.
Artigo em Russo | MEDLINE | ID: mdl-33874668

RESUMO

Correction of disorders during transformation into one of the most difficult tasks, both in orthodontics and in maxillofacial (orthognathic) surgery. This article presents two clinical cases of median osteotomy/ostectomy. The stages of operations are described. Surgical technique of transversal correction by osteotomy/ ostectomy is presented. Operation is combined with bilateral retromolar osteotomy. Three dimensional fragments moving helps to change lower jaw shape. Indications for this surgical manipulation: one or two side cross-bite, discrepancies between size of teeth and length of alveolar bone (lower macrognathia, microdentia, extra-teeth, huge diastema), asymmetry of mandible.


Assuntos
Má Oclusão , Procedimentos Cirúrgicos Reconstrutivos , Cefalometria , Humanos , Má Oclusão/cirurgia , Mandíbula/cirurgia , Osteotomia
10.
J Indian Soc Pedod Prev Dent ; 39(1): 104-105, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33885397

RESUMO

Anchorage control during the correction of severely crowded dentitions has always been a source of concern during orthodontic therapy. The Nance palatal arch (NPA) has, in the past, been widely used for reinforcing anchorage in such cases. Modifications of the NPA have been reported for use as a fixed functional appliance or for molar distalization. Herein, a simple, effective modification of the conventional NPA is introduced incorporating two power arms, which can be used for unravelling of anterior crowding at the same time effectively augmenting molar anchorage.


Assuntos
Má Oclusão de Angle Classe II , Desenho de Aparelho Ortodôntico , Cefalometria , Humanos , Dente Molar , Técnicas de Movimentação Dentária
11.
Am J Orthod Dentofacial Orthop ; 159(4): 512-521, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33795092

RESUMO

INTRODUCTION: This study aimed to evaluate the efficiency of a newly constructed computer-based decision support system (DSS) on the basis of artificial intelligence technology and designed to plan treatment for patients with a deep overbite. METHODS: With the help of information technology, a DSS was developed specifically for treatment planning of deepbite malocclusion. The program inputs were the components and the contributing factors used commonly by the orthodontic clinicians in deepbite diagnosis. The program outputs were the treatment planning options for deepbite treatment. A total of 357 decisions made by the algorithm were evaluated for accuracy by comparing them to the actual treatment changes of 51 patients with a well-treated deepbite. RESULTS: The decisions made by the algorithm were precise, with 94.4% having a very good agreement with actual treatment changes determined using Cohen's kappa coefficient. CONCLUSIONS: The constructed DSS was shown to be an efficient tool for planning treatment of deep overbite malocclusion in the permanent dentition; thus, the artificial intelligence could be used to formulate a customized plan for orthodontic clinicians.


Assuntos
Inteligência Artificial , Má Oclusão , Algoritmos , Cefalometria , Dentição Permanente , Humanos , Má Oclusão/terapia , Mandíbula
13.
Artigo em Inglês | MEDLINE | ID: mdl-33806739

RESUMO

Orthodontic treatment acts through the application of forces and/or by stimulating and redirecting the functional forces within the craniofacial complex. Considering the interrelationship between craniomandibular and craniocervical systems, this intervention may alter craniocervical posture. Thus, our aim is to (a) compare craniocervical posture, hyoid bone position, and craniofacial morphology before, after, and also in the contention phase at least one year after the orthodontic treatment, in patients with temporomandibular disorders and (b) to verify whether the presence of condylar displacement, the skeletal class, or the facial biotype interferes with the abovementioned outcomes. To do so an observational, analytical, longitudinal, and retrospective design study was carried out. A non-probabilistic convenience sampling method was applied. The sample consisted of clinical records of patients diagnosed with temporomandibular disorders in order to compare pre-orthodontic treatment with post-orthodontic treatment (n = 42) and contention phase data (n = 26). A cephalometric analysis of several variables was performed. The p-value was set as 0.05. When the pre- and post-orthodontic treatment data were analyzed, there were statistically significant changes in variables concerning craniocervical posture (CV angle, C0-C1, and AA-PNS) and also concerning hyoid bone position (C3-Rgn). When pre- and post-orthodontic treatment and contention phase data were analyzed the variables concerning craniocervical posture (C0-C1, CVT/Ver, NSL/OPT, NSL/CVT, NSL/Ver; OPT/CVT, OPT/Ver) and facial biotype had statistically significant changes. This allowed us to conclude that in the sample studied, there were significant differences regarding hyoid bone position (pre- versus post-orthodontic treatment) and craniocervical posture (pre- versus post-orthodontic versus contention), with the craniocervical posture being prone to return to basal values. The presence of condylar displacement was found to significantly increase the H-H1 distance in the three moments of evaluation. Facial biotype was found to significantly increase the NSL/Ver angle on hypodivergent compared to hyperdivergent in the contention phase.


Assuntos
Transtornos da Articulação Temporomandibular , Cefalometria , Cabeça/anatomia & histologia , Humanos , Osso Hioide , Postura , Estudos Retrospectivos , Transtornos da Articulação Temporomandibular/terapia
14.
Artigo em Inglês | MEDLINE | ID: mdl-33809695

RESUMO

Nose shape, size, and inclination influence facial appearance, but few studies concern the relationship between the nasal profile and craniofacial structures. The objective of this study was to analyze association of nasal cephalometric variables with skeletal structures, age, and sex. Cephalometric and nasal analysis was performed in 386 Polish orthodontic patients (aged 9-25 years). Student t-test and Mann-Whitney test were used to compare quantitative variables and Pearson's or Spearman's correlation coefficients-to find correlations. Soft tissue facial convexity angle correlates to Holdaway ratio, ANB (A-Nasion-B), and Wits appraisal. Nasal dorsum axis, nose length, nose depth (1) and nose depth (2), nose hump, lower dorsum convexity, and columella convexity increase with age. Nasal base angle, nasolabial angle, nasomental angle, soft tissue facial convexity and nasal bone angle decrease with age. Nasal base angle and nasomental angle are smaller in females. Thus, a relationship exists between nasal morphology and sagittal jaw configuration. Nasal parameters significantly change with age. Sexual dimorphism characterizes nasal bone angle and nasomental angle.


Assuntos
Face , Nariz , Adolescente , Adulto , Cefalometria , Criança , Face/anatomia & histologia , Face/diagnóstico por imagem , Feminino , Humanos , Nariz/anatomia & histologia , Nariz/diagnóstico por imagem , Radiografia , Caracteres Sexuais , Adulto Jovem
15.
Head Face Med ; 17(1): 13, 2021 Apr 14.
Artigo em Inglês | MEDLINE | ID: mdl-33853633

RESUMO

BACKGROUND: Orthognathic surgery can be carried out using isolated mandibular or maxillary movement and bimaxillary procedures. In cases of moderate skeletal malocclusion, camouflage treatment by premolar extraction is another treatment option. All these surgical procedures can have a different impact on the soft tissue profile. METHODS: The changes in the soft tissue profile of 187 patients (Class II: 53, Class III: 134) were investigated. The treatment approaches were differentiated as follows: Class II: mandible advancement (MnA), bimaxillary surgery (MxS/MnA), upper extraction (UpEX), or Class III: maxillary advancement (MxA), mandible setback (MnS), bimaxillary surgery (MxA/MnS), and lower extraction (LowEX) as well as the extent of skeletal deviation (moderate Wits appraisal: - 7 mm to 7 mm, pronounced: Wits <- 7 mm, > 7 mm, respectively). This resulted in five groups for Class II treatment and seven groups for Class III treatment. RESULTS: In the Class II patients, a statistically significant difference (p ≤ 0.05) between UpEX and moderate MnA was found for facial profile (N'-Prn-Pog'), soft tissue profile (N'-Sn-Pog'), and mentolabial angle (Pog'-B'-Li). In the Class III patients, a statistically significant differences (p ≤ 0.05) occurred between LowEX and moderate MxA for facial profile (N'-Prn-Pog'), soft tissue profile (N'-Sn-Pog'), upper and lower lip distacne to esthetic line (Ls/Li-E-line), and lower lip length (Sto-Gn'). Only isolated significant differences (p < 0.05) were recognized between the moderate surgical Class II and III treatments as well between the pronounced Class III surgeries. No statistical differences were noticed between moderate and pronounced orthognathic surgery. CONCLUSIONS: When surgery is required, the influence of orthognathic surgical techniques on the profile seems to be less significant. However, it must be carefully considered if orthognathic or camouflage treatment should be done in moderate malocclusions as a moderate mandibular advancement in Class II therapy will straighten the soft tissue profile much more by increasing the facial and soft tissue profile angle and reducing the mentolabial angle than camouflage treatment. In contrast, moderate maxillary advancement in Class III therapy led to a significantly more convex facial and soft tissue profile by decreasing distances of the lips to the E-Line as well as the lower lip length.


Assuntos
Má Oclusão de Angle Classe III , Procedimentos Cirúrgicos Ortognáticos , Cefalometria , Estética Dentária , Humanos , Má Oclusão de Angle Classe III/diagnóstico por imagem , Má Oclusão de Angle Classe III/cirurgia , Mandíbula , Resultado do Tratamento
16.
Orthod Fr ; 92(1): 129-140, 2021 Mar 01.
Artigo em Francês | MEDLINE | ID: mdl-33787498

RESUMO

The objective of this case series was to show how only one miniscrew can be used to treat simultaneously or successively canine impaction and different malocclusions. Three patients aged of 13 years old who had malocclusions, such as Class II, overbite and canine impaction, were each one treated with the same miniscrew throughout the treatment period. Palatal miniscrews were placed mesially to the first molar and used as a direct or indirect anchorage depending on the moment of the treatment. In each case, satisfactory treatment was obtained with correction of overbite, class II malocclusion and canine impaction. The first steps of treatment were aesthetic for the patient and did not require patient cooperation.


Assuntos
Má Oclusão de Angle Classe II , Procedimentos de Ancoragem Ortodôntica , Adolescente , Idoso , Parafusos Ósseos , Cefalometria , Estética Dentária , Humanos , Má Oclusão de Angle Classe II/terapia , Técnicas de Movimentação Dentária
17.
Br J Oral Maxillofac Surg ; 59(4): 413-418, 2021 05.
Artigo em Inglês | MEDLINE | ID: mdl-33714624

RESUMO

The purpose of this study was to validate the applicability of using maxillary voxel-based dentoalveolar registration (VDAR) at long-term follow up in orthognathic surgical patients. A retrospective sample of 25 patients (skeletal class II or III) who underwent bimaxillary orthognathic surgery was recruited and divided into two groups. Group A included 15 patients (seven females, eight males, mean (SD) age 25.8 (14.4) years) with unrestored dentition and group B involved 10 patients (five females, five males, mean (SD) age: 26.2 (11.9) years) with dental restorative treatment. Postoperative cone-beam computed tomography (CBCT) scans were acquired at four time-points, one to six weeks (T1), six months (T2), one year (T3) and two years (T4). Voxel- based registration was applied using the cranial base and then complete dental segment with part of the alveolar bone at T1-T2, T1-T3 and T1-T4 time-intervals. The translational and rotational accuracy and reproducibility of the registered maxillary segment was evaluated at these three intervals by analysing the transformation matrix using singular value decomposition. All translational and rotational measurements showed excellent reliability in both groups without any significant difference. The combined translational and rotational difference was found to be within the clinically acceptable range of 2mm and 4°. The VDAR was found to be accurate and reliable to be utilised for a long-term skeletal follow-up in orthognathic surgical patients.


Assuntos
Cirurgia Ortognática , Procedimentos Cirúrgicos Ortognáticos , Adulto , Cefalometria , Tomografia Computadorizada de Feixe Cônico , Feminino , Seguimentos , Humanos , Masculino , Maxila/diagnóstico por imagem , Maxila/cirurgia , Projetos Piloto , Reprodutibilidade dos Testes , Estudos Retrospectivos
18.
J Orofac Orthop ; 82(3): 187-197, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-33725143

RESUMO

PURPOSE: The aim of this study was to comparatively evaluate hand-wrist bones, cervical vertebrae and tooth development stages according to skeletal classification. METHODS: The orthodontic initial records of 297 patients were used and separated into three groups according to the skeletal malocclusion. Three groups including 99 people each were sampled representing malocclusions with Angle classes I, II and III, respectively. The panoramic, cephalometric and hand-wrist radiographs of all patients included in this study were used to compare dental and skeletal maturation indicators. Calcification of teeth was rated according to the system of Demirjian. To evaluate the stage of skeletal maturation hand-wrist radiographs were analyzed according to the Grave and Brown method. Also, Hassel and the Farman method was used to classifying vertebral developmental stages. Spearman rank correlation tests, as well as Fisher exact χ2 tests with r×c tables, were used for the comparison of categorical variables. RESULTS: Hand-wrist, vertebral and dental development stages showed a statistically significant relationship (p < 0.01) for both genders and in all malocclusions. The association between the different maturation indicators used in this study and the type of malocclusion was also statistically significant for both genders. It was observed that the peak period of skeletal maturation according to the hand-wrist radiograph findings correlated with the cervical vertebrae stage C3 in girls (63.2%) and C2-C3 in boys (43.5-43.5%). The weakest correlation was seen between the dental development stages and the skeletal developmental stages in the class II group (r = 0.443-0.220 [girls]; r = 0.604-0.410 [boys]). CONCLUSION: The use of the dental development stage as a reliable indicator of maturation was limited. According to the Demirjian method, the calcification stage of the second molar might indicate that the individual is in the pubertal peak period.


Assuntos
Má Oclusão , Dente , Determinação da Idade pelo Esqueleto , Calcificação Fisiológica , Cefalometria , Vértebras Cervicais/diagnóstico por imagem , Feminino , Humanos , Masculino , Má Oclusão/diagnóstico por imagem , Dente/diagnóstico por imagem , Punho/diagnóstico por imagem
19.
BMC Oral Health ; 21(1): 108, 2021 03 10.
Artigo em Inglês | MEDLINE | ID: mdl-33691678

RESUMO

BACKGROUND: Mouth breathing is closely related to the facial skeletal development and malocclusion. The purpose of this systematic review and meta-analysis was to assess the effect of mouth breathing on facial skeletal development and malocclusion in children. METHODS: An electronic search in PubMed, the Cochrane Library, Medline, Web of Science, EMBASE and Sigle through February 23rd, 2020, was conducted. Inclusion criteria were children under 18 years of age with maxillofacial deformities due to mouth breathing. The risk of bias in nonrandomized studies of interventions (ROBINS-I) tool for controlled clinical trials. The Grading of Recommendation, Assessment, Development and Evaluation (GRADE) approach was used for the quality assessment. The included indicators were SNA, SNB, ANB, SN-OP, SN-PP, PP-MP, SNGoGn, MP-H, 1-NA, 1. NA, 1. NB, 1-NB, Overjet, Overbite, SPAS, PAS, and C3-H. Data concerning the mean difference in mesial molar movement and extent of canine retraction were extracted for statistical analysis. The mean differences and 95% confidence intervals were analyzed for continuous data. Review Manager 5.3, was used to synthesize various parameters associated with the impact of mouth breathing on facial skeletal development and malocclusion. RESULTS: Following full-text evaluations for eligibility, 10 studies were included in the final quantitative synthesis. In Sagittal direction, SNA (MD: - 1.63, P < 0.0001), SNB (MD: - 1.96, P < 0.0001) in mouth-breathing children was lower than that in nasal-breathing children. ANB (MD: 0.90, P < 0.0001), 1. NA (MD: 1.96, P = 0.009), 1-NA (MD: 0.66, P = 0.004), and 1-NB (MD: 1.03, P < 0.0001) showed higher values in children with mouth breathing. In vertical direction, SN-PP (MD: 0.68, P = 0.0050), SN-OP (MD: 3.05, P < 0.0001), PP-MP (MD: 4.92, P < 0.0001) and SNGoGn (MD: 4.10, P < 0.0001) were higher in mouth-breathing individuals. In airway, SPAS (MD: - 3.48, P = 0.0009), PAS (MD: - 2.11, P < 0.0001), and C3-H (MD: - 1.34, P < 0.0001) were lower in mouth breathing group. CONCLUSIONS: The results showed that the mandible and maxilla rotated backward and downward, and the occlusal plane was steep. In addition, mouth breathing presented a tendency of labial inclination of the upper anterior teeth. Airway stenosis was common in mouth-breathing children. Trial registration crd-register@york.ac.uk, registration number CRD42019129198.


Assuntos
Má Oclusão de Angle Classe II , Sobremordida , Adolescente , Cefalometria , Criança , Face , Humanos , Mandíbula , Respiração Bucal
20.
BMC Oral Health ; 21(1): 111, 2021 03 10.
Artigo em Inglês | MEDLINE | ID: mdl-33691679

RESUMO

BACKGROUND: Larsen syndrome (LS) is a rare disorder of osteochondrodysplasia. In addition to large-joint dislocations, craniofacial anomalies are typical characteristics. In this report, we performed orthodontic analyses, including skeletal and occlusal evaluations, to examine whether the craniofacial skeletal morphology leads to the craniofacial anomalies in LS. CASE PRESENTATION: A 5 year old Japanese girl who was clinically diagnosed with LS was referred to the orthodontic clinic in the Fukuoka Dental College Medical and Dental Hospital because of a malocclusion. Clinical findings at birth were knee-joint dislocations, equinovarus foot deformities, and cleft soft palate. The patient showed craniofacial anomalies with hypertelorism, prominent forehead, depressed nasal bridge, and flattened midface. To evaluate the craniofacial skeletal morphology, cephalometric analysis was performed. In the frontal cephalometric analysis, the larger widths between bilateral points of the orbitale were related to hypertelorism. The lateral cephalometric analysis revealed the midface hypoplasia and the retrognathic mandible. These findings were responsible for the flattened appearance of the patient's face, even if the anteroposterior position of the nasion was normal. Her forehead looked prominent in relation to the face probably because of the retrognathic maxilla and mandible. Both the study model and the frontal cephalometric analysis indicated constriction of the upper and lower dental arches. The posterior crossbite facilitated by the premature contacts had developed in association with the constriction of the upper dental arch. CONCLUSIONS: This patient had some craniofacial anomalies with characteristic appearances in LS. It was evident that the underlying skeletal morphology led to the craniofacial dysmorphism.


Assuntos
Fissura Palatina , Osteocondrodisplasias , Cefalometria , Pré-Escolar , Feminino , Humanos , Mandíbula , Maxila , Osteocondrodisplasias/diagnóstico por imagem
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...