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1.
Zhonghua Kou Qiang Yi Xue Za Zhi ; 56(9): 873-879, 2021 Sep 09.
Artigo em Chinês | MEDLINE | ID: mdl-34496535

RESUMO

Objective: To record occlusal contact of primary dentition at maximal intercuspal position in children with individual normal occlusion. Methods: A total of 57 children were recruited from patients of the Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology. Inclusion criteria were that the subjects were 3-5 years old with no visually detectable caries or pupal and periapical diseases, had complete primary dentition, had individual normal occlusion, had normal function of craniofacial system, were medically healthy, could cooperate with sampling and had obtained written informed consent from the parents or guardians. Finally, forty-seven children aged 3 to 5 years old were enrolled, including 24 males and 23 females. The age, height and weight of all subjects were (4.1±0.7) years old (ranging 3.0-5.8 years old), (103.7±7.2) cm (ranging 90-120 cm) and (17.1±2.5) kg (ranging 12.5-22.5 kg), respectively. Occlusal abilities such as occlusal contact area, average bite pressure, maximum bite pressure, maximum bite force and occlusal balance were measured with Dental Prescale Ⅱ system. Results: Maximum bite force and occlusal contact area at intercuspal position in children with primary dentition were (567.40±223.84) N (ranging 226.7-1 154.6 N) and (18.56±6.54) mm2 (ranging 8.4-41.2 mm2), respectively. There was a significantly strong correlation between maximum bite force and occlusal contact area (r=0.954, P<0.01). Height and weight of children were also positively correlated with their maximum bite force (r=0.397, P=0.022 and r=0.453, P=0.008, respectively). Maximum occlusal bite force and contact occlusal area of boys [(651.80±224.34) N and (20.77±6.97) mm2] were significantly higher and larger than those of girls [(479.34±190.45) N and (16.25±5.27) mm2] (P<0.05). Thirty-two of all 47 children had one occlusal contact point with maximum bite pressure, mostly locating within the primary molar region. Bite forces of anterior and posterior teeth of primary dentition were (124.12±56.99) N and (450.11±205.09) N, respectively, about (21.82±11.40)% and (71.80±21.35)% of maximum bite force of the whole primary dentition. All of the occlusal balance points located in posterior teeth regions. Occlusal contacts were observed at both anterior and posterior teeth of primary dentition with individual normal occlusion. Conclusions: There was a great variation of maximum bite forces of primary dentitions at intercuspal position of children with individual normal occlusion. Maximum bite force of primary dentition was significantly correlated with occlusal contact area, height and weight of children. Occlusal contact points with maximum bite pressure and occlusal bite balance points of primary dentitions mostly located in primary molar regions.


Assuntos
Força de Mordida , Oclusão Dentária , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Dente Molar , Dente Decíduo
2.
Zhonghua Kou Qiang Yi Xue Za Zhi ; 56(9): 909-913, 2021 Sep 09.
Artigo em Chinês | MEDLINE | ID: mdl-34496541

RESUMO

Objective: To investigate the changes of occlusal delay time, percentage of occlusal force and patients' subjective satisfaction of masticatory function for single implant crown in one year after the application of space reserved occlusion design. To provide data support and suggestions for clinical occlusion design. Methods: Patients who had received single posterior dental implant restoration in Department of Prosthodontics, Capital Medical University School of Stomatology from January 2019 to December 2019 were selected. At 0.5, 3, 6 and 12 months after restoration, the T-scan Ⅲ occlusal analyzer was used to detect and record the initial occlusal contact time of the natural tooth and implanted single crown, the occlusal force percentage of single implant prosthesis and corresponding tooth on the contralateral side (control teeth) on the contralateral side (control teeth) were also recorded. Subjective satisfaction with the masticatory function of the implants was recorded using visual analogue scale (VAS). The changes of occlusal delay time (the difference of the initial occlusal time between implant restoration and the natural teeth), percentage of occlusal force and patients' subjective feeling with time were analyzed. All data were analyzed by repeated measurement analysis of variance, bilatteral P<0.01 was considered statistically significant. Results: A total of 48 patients aged (36.8±8.4) years (23 males, 25 females, aged 23-50 years) were recruited. The occlusal delay time at 0.5 months was 0.15 (0.08, 0.20) s, at 3 months was 0.11 (0.06, 0.16) s, at 6 months was 0.07 (0.03, 0.13) s and at 12 months was 0.06 (0.03, 0.10) s. The occlusal delay time was shortened at every two time points, and the occlusal force percentage of the implant crown increased significantly. The percentage of occlusal force of implant prosthesis at 0.5 months was (7.7±4.8)%, at 3 months was (10.6±5.9)%, at 6 months was (12.3±6.2)% and at 12 months was (13.2±6.7)%. The most significant change was during the period of 0.5-3 months. At 0.5 months, the occlusal force of implant prosthesis was significantly lower than that of control teeth (14.3±6.5)% (P<0.01). The VAS score at 0.5 months was (7.06±1.64) and was (8.71±0.74) at 12 months. The score was increased and the difference was statistically significant from 3 month to 12 month (P<0.01). Conclusions: The change of occlusal force percentage of single posterior dental implant is most obvious within 3 months after restoration. The occlusal condition should be reexamined and adjust occlusal after 3 months of implant restoration as appropriate.


Assuntos
Implantes Dentários , Prótese Dentária Fixada por Implante , Força de Mordida , Coroas , Oclusão Dentária , Feminino , Humanos , Masculino
3.
Bull Tokyo Dent Coll ; 62(3): 181-192, 2021 Sep 08.
Artigo em Inglês | MEDLINE | ID: mdl-34393142

RESUMO

Aggressive periodontitis mostly affects young people, causing rapid destruction of periodontal tissue and loss of supporting alveolar bone. The destruction of periodontal tissue induces pathological tooth movement, resulting in various types of malocclusion such as crowding or spacing in the dentition. This report describes orthodontic treatment for malocclusion due to generalized aggressive periodontitis. The patient was a 31-year-old woman who presented with the chief complaint of displacement in the anterior teeth. An oral examination revealed pathological tooth mobility throughout the entire oral cavity due to severe loss of periodontal support. Many gaps in the displaced maxillary anterior teeth and crowding in the mandibular anterior teeth were also observed. The goal of subsequent treatment was to achieve ideal overjet and overbite by aligning the teeth and closing the spaces via non-extraction orthodontic treatment with stripping. The periodontal disease was managed by a periodontist who provided guidance on oral hygiene and periodontal disease control throughout the course of orthodontic treatment. Appropriate occlusion and a good oral environment were achieved. The condition of the periodontal tissue stabilized during and after orthodontic treatment, and favourable occlusal stability was observed at the 2-year follow-up examination.


Assuntos
Periodontite Agressiva , Má Oclusão Classe II de Angle , Má Oclusão , Adolescente , Adulto , Periodontite Agressiva/terapia , Oclusão Dentária , Feminino , Humanos , Má Oclusão/terapia , Técnicas de Movimentação Dentária
4.
Stomatologiia (Mosk) ; 100(4): 37-43, 2021.
Artigo em Russo | MEDLINE | ID: mdl-34357726

RESUMO

The article is devoted to the development of methods and software for 3D analysis of the occlusal surface of teeth and occlusal contacts between antagonists. An algorithm for accurately determining the boundaries of the occlusal surface on the tooth surface for subsequent quantitative analysis: the area of the occlusal surface, the relief index, and the height of the cusps is presented. The area of not only direct contacts, but also near-contact zones in any of the selected surface separation ranges is quantified. Examples with geometric primitives and clinical examples explain the features and interpretation of 3D analysis datas obtained using the developed software.


Assuntos
Oclusão Dentária , Software , Humanos
5.
Stomatologiia (Mosk) ; 100(4): 104-108, 2021.
Artigo em Russo | MEDLINE | ID: mdl-34357737

RESUMO

On the example of a clinical case of functional TMJ disorders associated with loss of bite height, an algorithm for virtual determination of the Central relation position of the jaws based on the controlled width of the articular gap and the height of the bite is described. The subsequent 3D design and application of the repositional splint showed the reality of achieving the pre-planned position and the possibility of implementing the proposed approach in clinical practice.


Assuntos
Mandíbula , Côndilo Mandibular , Oclusão Dentária , Humanos , Mandíbula/diagnóstico por imagem , Articulação Temporomandibular/diagnóstico por imagem
6.
J Biol Regul Homeost Agents ; 35(3 Suppl. 1): 155-166, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34289675

RESUMO

It is widely recognized that the physiology of childbirth labor largely depends on the interaction between three factors: a) the force generated by uterine contractions; b) the structure and characteristics of the birth canal and c) the fetus. Harmony between these three variables determines the initiation of maternal dynamic phenomena and the establishment of an optimal maternal-fetal balance in which both warrant for a correct delivery timing. The present study considered the above known factors and assessed if any other factor, still not recognized, could also play a role, and eventually modify the timing of delivery during the expulsive period. In particular, we focused our attention on the role played by the temporomandibular joint and dental occlusion on maternal body balance and on the stability of muscular reflected forces. The importance of assessing the temporomandibular function and the dental occlusion lies in the fact that any alteration in chewing or in temporomandibular joint (TMJ) mobility and occlusion brings to relevant modifications on the vertebral column and pelvic girdle. Our hypothesis is based on the evidence that those women who have any kind of alteration in their dental occlusion, can have an altered capability of pushing during the expulsive period, as the force applied on the pelvic floor is not expressed. Moreover, recent studies have highlighted a relationship between temporomandibular dysfunctions and sleep apnea syndrome and between sleep apnea syndromes and pregnancy. These relationships are explored in this study.


Assuntos
Oclusão Dentária , Contração Uterina , Feminino , Humanos , Gravidez , Articulação Temporomandibular
7.
J Contemp Dent Pract ; 22(3): 268-272, 2021 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-34210927

RESUMO

AIM: To evaluate the active tactile sensitivity in individuals with complete natural dentition, determining the smallest thickness detected by the participants, and clarifying if there is a difference between the thicknesses analyzed. MATERIALS AND METHODS: Active tactile sensitivity was evaluated in 40 research participants. Inclusion criteria included participants with complete natural dentition, without active or history of periodontal disease, absence of temporomandibular disorders, bruxism, and restorations in the evaluated area. Exclusion criteria included age below 18 years. The active tactile perception threshold was evaluated by using carbon sheets of different thicknesses (0, 12, 24, 40, 80, 100, and 200 µm), which were inserted in the participants' premolars, bilaterally. The carbon sheet was inserted so as not to come into contact with the oral soft tissues. Subsequently, the participant occluded and was asked about the perception of the intraocclusal object 20 times in each occlusal contact. The collected data were tabulated considering the amount of positive and negative responses for each carbon thickness. Values of p < 0.05 were considered significant. RESULTS: The results showed that there was linearity in perception, on both sides, besides, the natural dentition was able to perceive difference in thickness from 12 µm. CONCLUSION: We conclude that the 12 µm thickness is noticeable in occlusion and can be differentiated from other thicknesses in natural dentition and that there is no difference between the tactile sensitivity of the right and left sides. CLINICAL SIGNIFICANCE: A better understanding of active oral tactile sensitivity will contribute to numerous clinical applications in dentistry, including occlusal adjustment in dental rehabilitation, dental implants prosthesis design, and survival of prosthetic rehabilitation.


Assuntos
Bruxismo , Boca Edêntula , Adolescente , Oclusão Dentária , Dentição , Humanos , Tato
8.
Zhejiang Da Xue Xue Bao Yi Xue Ban ; 50(2): 195-204, 2021 04 25.
Artigo em Inglês | MEDLINE | ID: mdl-34137226

RESUMO

To evaluate the therapeutic effect of using micro-implant anchorage (MIA) to rotate the functional occlusal plane (FOP) counterclockwise. Forty skeletal class Ⅱ high-angle patients who had completed orthodontic treatment were enrolled, including 20 patients treated with MIA orthodontic system (MIA group) and the other 20 patients treated with traditional sliding straight wire appliance (control group). Cephalometric measurements on the lateral cranial radiographs before and after treatment were performed, all acquired data were statistically analyzed with SPSS 26.0. At the end of treatment, MIA group obtained better effect of FOP and mandibular plane counter-clockwise rotation than the control group. In the MIA group, the average change of FOP-frankfort horizontal plane (FH), FOP-SN and mandibular plane angle (MP-FH) angle was -4.5(-7.3, -3.7)°, (3.3)° and -1.7(-3.0, -0.9)°, respectively. In the control group, the average change of FOP-FH, FOP-SN and MP-FH angle was -0.1(-4.1, 3.0)°, (-0.1±5.1)° and -0.4(-2.4, 0.7)°, respectively. There was significant difference between the change of the two groups (all <0.05). Compared with the traditional sliding straight wire appliance, counterclockwise rotation of FOP can be more effectively reversed by using MIA orthodontic system, and the MP-FH can be reduced as well.


Assuntos
Oclusão Dentária , Má Oclusão Classe II de Angle , Cefalometria , Humanos , Má Oclusão Classe II de Angle/terapia , Mandíbula , Maxila , Resultado do Tratamento
9.
Br Dent J ; 230(12): 790, 2021 06.
Artigo em Inglês | MEDLINE | ID: mdl-34172844
11.
Stomatologiia (Mosk) ; 100(3): 60-64, 2021.
Artigo em Russo | MEDLINE | ID: mdl-34180627

RESUMO

The study is devoted to the error analysis of digital registration of lower and upper jaws laboratory and intraoral scans in position of habitual occlusion. It was found that in both cases, penetrating contacts (supracontacts) are formed, and their depth is in the range (-50) - (0) microns. The number and area of these contacts is higher for lateral teeth. The number and area of supracontacts is higher for laboratory scanning (3.7±1.81 mm2) than for intraoral scanning (0.5±0.42 mm2). Applying virtual contact optimization does not change the localization of contacts, but rather normalizes them in both cases. It is recommended to perform this preliminary correction before the planning stage in 3D dental treatment.


Assuntos
Modelos Dentários , Dente , Oclusão Dentária , Imageamento Tridimensional , Maxila
12.
Rev. cient. odontol ; 9(2): e060, abr.-jun. 2021. ilus, tab
Artigo em Espanhol | LILACS, LIPECS | ID: biblio-1254599

RESUMO

Objetivo: Comparar el ángulo de la guía condílea sagital obtenida del registro radiográfico y clínico en pacientes dentados. Materiales y métodos: La muestra estuvo conformada por un grupo único de estudio de 32 pacientes, en el que se evaluó la radiografía lateral estricta y los registros posicionales: en relación céntrica, registro protrusivo a 5 mm en lateralidad derecha y registro protrusivo a 5 mm en lateralidad izquierda. Con el registro posicional del arco facial se articuló el modelo superior, con el registro posicional en relación céntrica se articuló el modelo inferior, con los registros laterales protrusivos de los lados derecho e izquierdo se obtuvo la medida del ángulo de la guía condílea sagital para la programación del articulador semiajustable. El plan estadístico en la presente investigación utilizó el programa SPSS versión 24, la normalidad fue evaluada usando el test de Shapiro-Wilk, también se realizaron las pruebas de T de Student y correlación de Pearson. Resultados: Se determinó estadísticamente que el género y la edad influyen en la medida del ángulo de la guía condílea sagital. El método radiográfico presentó un ángulo de guía condílea de 35,69 ±5,18 y con el método clínico fue 35,69 ± 5,16 (p > 0,05). La prueba de correlación de Pearson sí mostró una correlación importante entre ambos métodos r = 0,948, p < 0,001. Conclusiones: Existe alta correlación en las medidas obtenidas del ángulo de la guía condílea sagital con los registros radiográficos y clínicos; esta concordancia permitiría reemplazar un método por el otro. (AU)


Objective: To compare the angle of the sagittal condylar guidance obtained from the radiographic and clinical records of dentate patients. Materials and Methods: The sample consisted of 32 patients in whom strict lateral radiography and positional records were performed: in centric relation, protrusive recording 5 mm in right laterality and protrusive recording 5 mm in left laterality. With the positional registration of the facebow, the upper model was articulated, while the lower model was articulated with the positional registration in centric relation, and with the protrusive lateral registrations on the right and left side the condylar guidance was obtained for programming the semi-adjustable articulator. Statistics were performed with the SPSS program version 24 in Spanish. Normality was evaluated using the Shapiro-Wilk test, for data with normal distribution, and the Student's T test and Pearson's correlation were performed in descriptive statistics. Results: The statistical analyses showed that gender and age influence the angle measurement of the sagittal condylar guide. The radiographic method presented a condylar guide angle of 35.69 ± 5.18, being 35.69 ± 5.16 with the clinical method (p> 0.05). Pearson's correlation test showed an important correlation between the two methods (r = 0.948, p <0.001). Conclusions: There is a high correlation in the measurements obtained from the angle of the sagittal condylar guide and the radiographic and clinical records, indicating that both methods are effective. (AU)


Assuntos
Humanos , Masculino , Feminino , Adulto , Adulto Jovem , Radiografia Panorâmica , Cefalometria , Oclusão Dentária , Côndilo Mandibular , Epidemiologia Descritiva , Estudos Transversais , Estudos Retrospectivos , Estudos Observacionais como Assunto
13.
J Oral Rehabil ; 48(8): 891-900, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-33983634

RESUMO

BACKGROUND: Passive mandibular advancement with functional appliances is commonly used to treat juvenile patients with mandibular retrognathism. OBJECTIVE: The aim of this study was to investigate whether active repetitive training of the mandible into an anterior position would result in a shift of the habitual mandibular position (HMP). METHODS: Twenty adult healthy subjects were randomly assigned to one of two groups: a training group receiving six supervised functional training sessions of 10 min each and a control group without training. Bonded lateral biteplates disengaged occlusion among both groups throughout the 15-day experiment. Customised registration-training appliances consisted of a maxillary component with an anterior plane and a mandibular component with an attached metal sphere. Training sessions consisted of repeated mouth-opening/closing cycles (frequency: 30/min) to hit an anteriorly positioned hemispherical target notch with this metal sphere. The HMP was registered at defined times during the experiment. RESULTS: The HMP in the training group showed a statistically significant anterior shift of 1.6 mm (interquartile range [IQR]: 1.2 mm), compared with a significant posterior shift of -0.8 mm (IQR: 2.8 mm) in the control group (p < .05). Although the anterior shift among the training group showed a partial relapse 4 days after the first training block, it then advanced slightly in the 4-day interval after the second training block, which might indicate neuroplasticity of the masticatory motor system. CONCLUSIONS: Motor learning by repetitive training of the mandible into an anterior position might help to improve the results of functional appliance therapy among patients with mandibular retrognathism.


Assuntos
Má Oclusão , Avanço Mandibular , Adulto , Cefalometria , Oclusão Dentária , Humanos , Mandíbula
14.
Am J Orthod Dentofacial Orthop ; 159(5): e389-e397, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-33931225

RESUMO

INTRODUCTION: Determination of improvement in orthodontic treatment may depend on the measurement method used and the purpose. METHODS: Improvement after orthodontic treatment (from T1 to T2 [beginning to end of treatment]) was assessed 3 ways from a set of 98 patient records: (1) calculated by subtracting judges' assessments at T2 from T1 for records presented in random order, (2) judged as a holistic impression viewing T1 and T2 records side by side, and (3) determined from proxies (American Board of Orthodontics Discrepancy Index, the American Board of Orthodontics Objective Grading System, and the Peer Assessment Rating index). RESULTS: High levels of intramethod consistency were observed, with intraclass correlation coefficient clustering around an intraclass correlation coefficient of 0.900, and distributions were normal. Calculated and judged improvements correlated at r = 0.606. Calculated or judged improvements were correlated at a lower level with proxies. Calculated improvement was significantly associated with "challenge" (T1) scores and judged improvement associated with "results" (T2) scores. Common method bias was observed, with higher correlations among similar indexes than among indexes at the same time that used various methods. Relative to differences in Peer Assessment Rating scores, calculated improvement overestimated low scores and underestimated high ones. The same effect, but statistically greater, was observed using direct judgment of improvement. CONCLUSIONS: These findings are consistent with decision science and measurement theory. In some circumstances, such as third-party reimbursement and research, operationally defined measures of occlusion are appropriate. In practice, the determination of occlusion and improvement are best performed by judgment that naturally corrects for biases in proxies and incorporates background information.


Assuntos
Má Oclusão , Ortodontia , Assistência Odontológica , Oclusão Dentária , Humanos , Julgamento , Má Oclusão/terapia , Ortodontia Corretiva , Resultado do Tratamento
15.
Arch Oral Biol ; 127: 105157, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-34015688

RESUMO

OBJECTIVE: To use cone beam computed tomography (CBCT) scans to analyze mandibular symmetry, the occlusal plane and their correlations in patients with high-angle skeletal class III malocclusion and jaw deformity. DESIGN: Reconstructed images simulated of CBCT data of 20 adult patients with high-angle skeletal class III malocclusion and jaw asymmetry (Experimental group) and 20 adult patients of skeletal class I with normal faces (Control group) were measured with a three-dimensional (3D) geometric morphological measurement system. Related landmarks, lines and planes were marked and relevant distances and angles of 3D craniofacial structures were measured. The Student t-test was performed to assess symmetry. With the help of the Pearson correlation and Linear regression, we explored the correlations and other relationships among them. RESULTS: Compared with control group, the symmetrical differences in experimental group were concentrated in condyle, coracoid process, mandibular angle, mandibular first molar area and the chin (P < 0.05). A strong positive correlation was found between the degree of mandibular deviation and the inclination of the occlusal plane in the coronal position (r = 0.860, P < 0.001) and a linear relationship between them was found: Y = 1.300 + 0.419X (the inclination of occlusal plane was Y, and the mandibular deviation was X). CONCLUSIONS: Certain characteristics of mandibular symmetry and the occlusal plane were found in patients with high-angle skeletal class III malocclusion and jaw asymmetry. These findings provide references for doctors to pay attention to the degree and location of mandibular asymmetry and to determine the occlusal plane.


Assuntos
Oclusão Dentária , Má Oclusão , Adulto , Cefalometria , Tomografia Computadorizada de Feixe Cônico , Humanos , Imageamento Tridimensional , Mandíbula/diagnóstico por imagem
16.
J Pak Med Assoc ; 71(3): 863-867, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-34057937

RESUMO

OBJECTIVE: To evaluate the parallelism of natural maxillary occlusal plane with inter-pupillary line and ala-tragus line, and to evaluate the anatomic relationship of natural mandibular occlusal plane with retromolar pad among dentate subjects. METHODS: The cross-sectional study was conducted from September 2017 to February 2018 at Fatima Jinnah Dental College, Karachi, and comprised front and profile photographs of subjects aged 20-28 years while holding the camper's plane against the maxillary occlusal plane. The photographs were imported in a software and an interpupillary line was drawn and the angle with Camper's plane was measured. On both profile pictures, lines were drawn from base of the ala to the superior, middle and inferior points on the tragus. The angle between ala-tragus line and Camper's plane were measured. Intra-orally, height of the mandibular occlusal plane in relation to the retromolar pad was evaluated using a stainless steel scale. Data was analysed using SPSS 23. RESULTS: Of the 109 subjects with a mean age of 23.03±1.36 years, 76(69.72%) were females. Horizontal parallelism of occlusal plane with inter-pupillary line was observed with a mean angle of 1.17±1.27 degrees. The angle between the occlusal plane and the inferior ala-tragus line was 4.25 degrees on the right side, and 4.50 degrees on the left. Intraorally, mandibular occlusal plane coincided with the inferior 48(44%) and the middle third 48(44%) of the retromolar pad. CONCLUSIONS: Inter-pupillary line and retromolar pad area should be used as a guide in the determination of plane of occlusion. The ala-tragus line was not found to be a reliable guide.


Assuntos
Oclusão Dentária , Boca , Adulto , Cefalometria , Estudos Transversais , Feminino , Humanos , Masculino , Mandíbula/diagnóstico por imagem , Adulto Jovem
18.
Shanghai Kou Qiang Yi Xue ; 30(1): 1-6, 2021 Feb.
Artigo em Chinês | MEDLINE | ID: mdl-33907770

RESUMO

Judged from the clinical manifestations, etiological mechanisms and jaw morphological structures, malocclusions with mandibular deviation and facial asymmetry are classified into three main categories, i.e., those with mandibular positioning factors, those with mandibular condyle defects, and those with jaw congenital deformities. In the first category, three subtypes, including mandibular rotation caused by dentitional irregularities, by dental compensation and by habitual posturing, are further defined. In the second category, mandibular deviation caused by condylar asymmetrical resorption or hyperplasia are defined as the two subtypes. The third category is further divided into two subtypes, i.e., jaw and facial asymmetry resulting from maxillary or mandibular structural deformities. The prime goal of orthodontic therapy is to displace and restore the deviated mandible to its right position, followed by correction of occlusal intercuspation. As an important procedure of the whole treatment protocol, It is critical to detect and localize the correct mandibular position by manipulation and then register it by wax pattern and articulator transferring. For the cases with mandibular functional elements and condylar asymmetrical length, the treatment modalities include orthopedic repositioning of the mandible by using occlusal and bite plane, SGTB and SGHB therapies; for cases with growth and developmental anomalies, orthognathic intervention should be an optimal solution.


Assuntos
Assimetria Facial , Má Oclusão , Oclusão Dentária , Humanos , Mandíbula , Côndilo Mandibular/diagnóstico por imagem
19.
Artigo em Russo | MEDLINE | ID: mdl-33899448

RESUMO

Chronic pain syndromes in the neck and shoulder girdle are one of the important clinical problems due to their high prevalence. In addition, it's of great interest to study the mutual influence of the musculoskeletal system pathology, balance organs and dentoalveolar system due to the possible negative impact of these structures on each other which surely affects the treatment timing and its results. OBJECTIVE: To develop a diagnostic algorithm and a comprehensive program for the treatment and rehabilitation of patients with cervicobrachialgia combined with pathological dental occlusion. MATERIAL AND METHODS: The study involved 90 persons of both genders aged 18 to 55 years consisted of 3 clinical study groups (25 patients) and one control group (15 healthy persons). The clinical groups included 75 patients with chronic myofascial pain syndrome in the neck and shoulder girdle resistant to drug therapy, with temporomandibular joint (TMJ) dysfunction and/or pathological dental occlusion (PDO). The groups were formed depending on the chosen treatment methods: manual therapy was used in the 1st group; in the 2nd group - dental treatment aimed at correcting PDO; in the 3rd group the manual therapy was used together with the correction of the jaws' occlusal relationship. RESULTS: In the study course the most effective algorithm for the diagnosis and rehabilitation of patients with cervicobrachialgia caused by pathological dental occlusion was determined. Positive clinical results were noted in patients of all three groups; however, in the 3- group where manual therapy and complex dental treatment were carried out the results are not differing significantly from the controls. The study showed that in patients with myofascial pain syndrome at the cervical and shoulder levels caused by TMJ dysfunction and pathological dental occlusion it's advisable to include manual and osteopathic diagnostics in the algorithm. Manual muscle testing, posture tests in combination with 3D X-ray imaging and computerized functional studying the maxillofacial region should be used to identify etiology-pathogenesis links between these conditions. These methods are also applicable for quality control of treatment. CONCLUSION: Thus, as a study result the diagnostic algorithm was developed; it allows to determine the relationship of pharmacoresistant pain syndrome of the cervicobrachial region with dental pathology at high degree of accuracy; and a comprehensive interdisciplinary approach to the therapy and rehabilitation of this combined pathology was proposed.


Assuntos
Oclusão Dentária , Síndromes da Dor Miofascial , Adolescente , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Postura , Adulto Jovem
20.
Stomatologiia (Mosk) ; 100(2): 60-63, 2021.
Artigo em Russo | MEDLINE | ID: mdl-33874663

RESUMO

OBJECTIVE: To study the effect of morphological parameters of natural teeth and fixed partial dentures supported by dental implants on the time of occlusion. MATERIAL AND METHODS: The study of the morphological parameters of the first right upper and lower molars of natural teeth and fixed partial dentures supported by dental implants in the positions of the first molars of the upper and lower jaws, followed by determination of the relationship between the obtained data and the occlusion time using mathematical and statistical analysis. RESULTS: The study of the morphology of the occlusal surface of natural teeth and fixed partial dentures supported by dental implants did not reveal significant differences in the results of measuring the distances between the cusps of the upper and lower first molars, both natural teeth and fixed partial dentures supported by dental implants. However, the angles of the slopes of the cusps and the angles between cusps in natural teeth are sharper than those of artificial crowns. CONCLUSION: According to the correlation analysis in both groups, the relationship between the occlusion time and the morphological parameters of the lower molars was determined; the relationship between the morphological parameters of the upper molars and the occlusion time was not revealed.


Assuntos
Implantes Dentários , Boca Edêntula , Oclusão Dentária , Prótese Dentária Fixada por Implante , Prótese Parcial Fixa , Humanos
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