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1.
Orthod Fr ; 91(4): 347-360, 2020 Dec 01.
Artigo em Francês | MEDLINE | ID: mdl-33319769

RESUMO

According to several theories, the oro-facial sphere would be interconnected with the rest of the body justifying the requests for care to improve a body zone at a distance. The aim of this literature review was to look for potential distant links of dysmorphoses of the three dimensions of space according to the etiopathogenic theories and the data of science. We carried out a keyword search leading to 58 references. In the transverse dimension, the transverse maxillary hypoplasia and dissymmetry of the molar class of the transverse dimension would not induce a change in the distribution of the weight of the body on a stabilometric platform. In the vertical dimension, hyperdivergent patients have a decreased bite force, cephalic extension with respect to the spine, an extension of the base of the skull, and decreased cervical lordosis. In the anteroposterior dimension, skeletal classes II would be associated with increased cervical lordosis and posterior cephalic extension according to the « true vertical ¼ (inversely for classes III). The prevalence of dental classes II would be increased in scoliosis subjects. Studies with a low level of evidence (grade III, IV or even V) should be interpreted with caution because the simultaneous presence of concomitant anomalies does not allow us to conclude that there is a cause-and-effect relationship.


Assuntos
Lordose , Escoliose , Cefalometria , Humanos , Maxila , Postura , Dimensão Vertical
2.
J Craniomaxillofac Surg ; 48(12): 1100-1105, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33191113

RESUMO

The aim of this study was to evaluate the postsurgical mandibular changes after surgery based on vertical dimension increase in skeletal Class III deformities. Patients who underwent mandibular setback surgery for skeletal Class III malocclusion correction with surgery-first orthognathic treatment were enrolled in the study. Lateral cephalograms were obtained at initial visit, immediately after surgery, 6 months after surgery, and at post-treatment. Postsurgical change of the mandible based on the vertical dimension increase was estimated using a diagrammatic method before surgery and this amount was compared with the actual amount of mandibular forward movement at 6 months after the surgery, using a paired t-test and Bland-Altman plot. Thirty patients (16 men and 14 women; mean age, 22.6 years) with skeletal Class III deformities had undergone mandibular setback surgery with the surgery-first orthognathic treatment. Immediately after surgery, the mandible setback was 9.4 ± 3.7 mm at pogonion. Six months after surgery, the mandible moved forward at an average of 2.3 ± 1.5 mm which corresponded to the estimated value of 2.2 ± 0.9 mm. The estimated amount of postsurgical movement did not show a statistically significant difference from the actual value on paired t-test (p = 0.349). The Bland-Altman analysis showed that the difference between the two values was within the limits of agreement. The postsurgical changes based on vertical dimension increase in surgery-first orthognathic treatment might be predicted by using a diagrammatic method.


Assuntos
Má Oclusão de Angle Classe III , Maxila , Adulto , Cefalometria , Feminino , Seguimentos , Humanos , Masculino , Má Oclusão de Angle Classe III/cirurgia , Mandíbula/cirurgia , Estudos Retrospectivos , Dimensão Vertical , Adulto Jovem
5.
Chin J Dent Res ; 23(3): 215-220, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32974622

RESUMO

The main goal of this report was to solve a clinical case of a 73-year-old man with diabetes, partial edentulism and a pathological occlusion with biocorrosion using conservative and adhesive techniques. A complete rehabilitative treatment was performed, increasing the vertical dimension of occlusion using indirect restorations with composite resins on teeth and resin crowns on implants and returning function using mutually protected occlusion. A 6-month posttreatment clinical and radiographic follow-up was performed.


Assuntos
Falha de Restauração Dentária , Estética Dentária , Idoso , Resinas Compostas , Coroas , Planejamento de Prótese Dentária , Humanos , Masculino , Dimensão Vertical
6.
Cient. dent. (Ed. impr.) ; 17(2): 139-146, mayo-ago. 2020. tab
Artigo em Espanhol | IBECS | ID: ibc-195102

RESUMO

Hablamos de sonrisa gingival cuando se altera la armonía establecida entre los dientes, labios y encía, exponiendo más allá de 2 mm de encía coronal a los incisivos maxilares, una circunstancia que, en ocasiones, genera un problema estético para algunos pacientes. La etiopatogenia de dicha condición se resume en tres facetas: dentoperiodontal (erupción pasiva alterada y erupción activa alterada), ósea (esquelética y/o dentoalveolar) y muscular (labio superior corto e hipermovilidad labial).Una condición multifactorial como la sonrisa gingival precisa un abordaje multidisciplinar: cirugía plástica periodontal, ortodoncia, cirugía ortognática, reposición labial, infiltración de toxina botulínica y tratamiento estético complementario


The excessive gingival display when a patient smiles (from 2 mm or more) is known as gummy smile. When the harmony established between the teeth, lips and gum is altered, exhibiting short clinical crown of the maxillary anterior teeth, in occasions generates an aesthetic problem for some patients.There are different etiologies of gummy smile, it concludes in three facets: dentoperiodontal (Altered Passive Eruption and Altered Active Eruption), bone defect (excessive vertical bone growth, dentoalveolar extrution) and muscular (short upper lip and upper lip hyperactivity), and the combination of some of these factors.A multifactorial condition requires a multidisciplinary boarding: plastic periodontal surgery, orthodontic, orthognathic surgery, lip reduction, infiltration of Botulinum toxin and complementary aesthetic treatment


Assuntos
Humanos , Técnicas Cosméticas , Sorriso/fisiologia , Músculos Faciais/anatomia & histologia , Músculos Faciais/fisiologia , Dimensão Vertical , Crescimento Excessivo da Gengiva/cirurgia , Ortodontia/métodos , Ortodontia Corretiva/métodos , Periodontia , Cirurgia Ortognática
8.
Int J Prosthodont ; 33(4): 380-385, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32639697

RESUMO

PURPOSE: To test the accuracies of different methods of digital vertical dimension augmentation (VDA) by comparison with a clinical situation. MATERIALS AND METHODS: Bite registrations with approximately 5 mm of VDA were made in the incisor regions of 10 subjects (mean VDA 4.5 mm). The conventional maxillary and mandibular stone casts in maximum intercuspation (MICP) and VDA bite registrations were digitized for all subjects using a laboratory scanner (control group). Lateral portraits were taken of all subjects to locate the position of the condylar axis. Four different digital VDA methods were compared to the control group: 100% rotation of the mandible referring to the lateral picture (100RL); 85% rotation and 15% translation referring to the lateral picture (85R15TL); 100% rotation in normal mounting mode of the Trios virtual articulator (100R); and jaw-motion analysis (JMA) equipment. The amount of VDA for each experimental group was compared to the control group. The augmented distances between the central incisors and the second molars were measured using 3D analyzing software. The ratio of the augmented distances between the posterior and anterior regions (P/A ratio) was calculated. One-way analysis of variance and multiple comparisons via least significant difference test were carried out to determine statistical significance. RESULTS: The P/A ratio of each group was as follows: Control = 0.61; 100RL = 0.55; 85R15TL = 0.61; 100R = 0.53; JMA = 0.52. Significant differences were observed for control vs JMA and for 85R15TL vs JMA (P < .05). The addition of translational movement was the primary factor for increasing the accuracy of digital VDA, with the lateral picture being a secondary factor. CONCLUSION: VDA using a virtual articulator with 100% rotation induces an error when compared to the clinical situation. When a clinician performs digital VDA, the setting of 85% rotation and 15% translation produces results closer to the real clinical condition.


Assuntos
Articuladores Dentários , Modelos Dentários , Registro da Relação Maxilomandibular , Mandíbula , Projetos Piloto , Dimensão Vertical
9.
Gen Dent ; 68(4): 69-76, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32597782

RESUMO

The objective of this pilot study was to evaluate the effect of a multidimensional approach to occlusal registration, including vertical dimension as assessed using pharyngometry, on the success of oral appliance therapy. Successful medical improvements resulting from therapy were determined by secondary polysomnographic studies. Thirty patients were enrolled in this pilot study. Their initial apnea-hypopnea index (AHI) scores ranged from 6.0 (mild obstructive sleep apnea) to 81.6 (severe obstructive sleep apnea). Occlusal registrations were taken using pharyngometer readings to establish vertical and anteroposterior (AP) positions for each patient and compared to the AP-only position in the same patient, determined using a George Gauge at 70% protrusion. All follow-up sleep tests occurred 31-45 days after the delivery of oral appliances set at the multidimensional vertical and AP positions determined by pharyngometry. No appliance titration was required. In the 26 patients who completed the study, the mean AHI before therapy was 20.7, and the mean AHI after therapy was 7.8, a 62.3% decrease. Within the limitations of this study, the pharyngometer-established occlusal position was effective in lowering AHI without the need for appliance titration procedures, which are typically required when the 70% protrusive George Gauge occlusal registration method is used. Additionally, the position determined with the 70% George Gauge was, on average, 5.0 mm more protrusive than the pharyngometer registration.


Assuntos
Medicina , Sono , Humanos , Projetos Piloto , Polissonografia , Resultado do Tratamento , Dimensão Vertical
10.
Am J Orthod Dentofacial Orthop ; 157(6): 773-782, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32487307

RESUMO

INTRODUCTION: Patients seeking orthodontic treatment often have esthetic concerns (ie, they want a better smile). Patients with increased vertical facial dimensions have different smile traits than other patients. This study aimed to compare the smile characteristics of subjects with different vertical facial dimensions and to use stereophotogrammetry to evaluate the changes in facial animation upon smiling. METHODS: One hundred twenty adolescents and young adults (aged 15-25 years) who were referred for orthodontic treatment were divided into 2 groups according to their vertical facial height: increased (n = 30) and normal (n = 30). Three-dimensional stereophotogrammetric images were obtained from the patients during rest and smile. The images were superimposed, and the displacements of specific landmarks were recorded. Linear, angular, and proportional measurements were recorded on the smile and rest images. RESULTS: When smiling, horizontal movement of commissures was less (right, P = 0.038; left, P = 0.009), upper lip elevation was higher (P = 0.014), and the upper lip was shorter (P = 0.014) in the vertical group than in the normal group. In the vertical group, the interlabial gap was increased both at rest and when smiling (P <0.001). Statistically significant differences were found in smile index (P = 0.001), nasolabial fold displacement (P = 0.018), and lip angles (both P = 0.001) between groups. CONCLUSIONS: Group and sex differences were observed when smiling. Careful consideration of these differences will help clinicians in proper diagnosis and treatment planning.


Assuntos
Estética Dentária , Sorriso , Adolescente , Adulto , Face , Feminino , Humanos , Lábio , Masculino , Fotogrametria , Dimensão Vertical , Adulto Jovem
11.
Compend Contin Educ Dent ; 41(5): 284-289, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32369386

RESUMO

As conservative dentistry has progressed in recent years, new developments in bonding protocols have enabled clinicians to predictably utilize restorative material on any surface of the tooth to achieve treatment goals. One such advancement is the bonding of composite and indirect restorations to the occlusal surfaces of posterior teeth to modify the occlusal vertical dimension (OVD). In this case presentation involving a patient with a constricted chewing pattern (CCP) who did not want orthodontic therapy, conservative treatment focused on increasing the patient's OVD using a combination of direct and indirect restorations in an attempt to alleviate the CCP. This minimally invasive additive approach addressed the esthetics in the case while limiting functional and biomechanical risks.


Assuntos
Desgaste dos Dentes , Dente , Restauração Dentária Permanente , Estética Dentária , Humanos , Dimensão Vertical
12.
Indian J Dent Res ; 31(2): 263-276, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32436908

RESUMO

Aim: (1) To apply the quadrilateral analysis to adult male and female Chennai population with normal occlusion, (2) To compare the results to Chennai adult male and female with anterior openbite, (3) To evaluate the correlation of the quadrilateral variables and (4) To establish additional parameters to determine an openbite tendency. Materials and Methods: The study was carried out from the values taken from 120 pretreatment lateral cephalograms of the selected Chennai population and divided into two groups. Group A consists of 60 lateral cephalograms of 30 male and 30 female patients with balanced anteroposterior and vertical facial proportion and normal overjet and overbite relationship. Group B consists of 60 lateral cephalograms of 30 male and 30 female patients with anterior openbite and comparision done with 2 groups. Results in normal subjects the lower facial heights are equal. In anterior openbite subjects. The facial heights. The sagittal angle. The maxillary and mandibular sagittal ratios. Lower facial height and sagittal ratio is larger than normal. Results: statistical analysis performed with Version 23(SPSS) and Student's t test were done to describe the mean and standard deviation. To assess the relationship pearson correlation was used.The probability value of 0.05 is consdered as significant. Conclusion: The malformation of the craniofacial structure in anterior openbite subjects resides in the maxillomandibular complex. The overbite depth indicator, the sagittal angle, the maxillary, and mandibular sagittal ratio can be additional parameters in determining an openbite tendency.


Assuntos
Má Oclusão , Mordida Aberta , Adulto , Cefalometria , Feminino , Humanos , Índia , Masculino , Mandíbula , Dimensão Vertical
13.
Int J Oral Maxillofac Implants ; 35(3): 461-478, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32406642

RESUMO

PURPOSE: The aim of this study was to investigate the effect of implant and surgical characteristics on the mucosal vertical dimension components. Mucosal vertical dimension consists of the sulcular epithelium and the supracrestal tissue attachment, which can be clinically measured from the gingival margin to the bone-to-implant contact. Connective tissue attachment is measured from the apical border of attached epithelium to the first bone-to-implant contact, while epithelial vertical dimension is measured from the mucosal margin to the apical border of attached epithelium. MATERIALS AND METHODS: An electronic and manual search for relevant articles published from January 1980 to May 2019 was performed. Animal studies of ≥ 10 implants followed by histometric analysis were included. Quality assessment was performed using the ARRIVE guidelines, and risk of bias assessment was performed using SYRCLE guidelines. Subgroup meta-analysis was performed to analyze the influence of different surgical approaches and implant design. RESULTS: A total of 38 articles were included. The mean value and corresponding standard error of mucosal vertical dimension, supracrestal tissue attachment, connective tissue attachment, and epithelial vertical dimension were 3.39 ± 0.07 mm, 2.9 ± 0.12 mm, 1.35 ± 0.04 mm, and 2.0 ± 0.06 mm, respectively. Supracrestal and subcrestal bone-level implants had significantly higher mucosal vertical dimension than equicrestal bone-level implants. Platform-switching implants demonstrated significantly lower mucosal vertical dimension compared with non-platform-switching implants. CONCLUSION: Within its limitations, this review showed that equicrestal implants had a smaller mucosal vertical dimension than subcrestal and supracrestal implants, and platform-switching implants possessed a smaller mucosal vertical dimension.


Assuntos
Perda do Osso Alveolar , Implantes Dentários , Animais , Tecido Conjuntivo , Implantação Dentária Endo-Óssea , Planejamento de Prótese Dentária , Dimensão Vertical
14.
J Clin Pediatr Dent ; 44(2): 130-134, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32271658

RESUMO

Objectives: To evaluate the time taken and the mechanism through which the occlusion settles following the placement of a preformed metal crown (PMC) using the Hall technique. The secondary objective was to assess any temporo mandibular joint dysfunction (TMD) resulting from the Hall technique through a questionnaire. Study Design: 44 children fulfilling the inclusion criteria were evaluated for changes in overbite and occlusal vertical dimension (OVD) following the placement of preformed metal crowns (PMCs) using the Hall technique. The overbite and OVD measurements were taken before treatment, immediately post treatment, then at one, two, three and four weeks post treatment. After four weeks, a questionnaire recorded the occurrence of any signs or symptoms of TMD. Results: At the fourth week, the overbite measurement did not show a statistically significant difference (p value= 0.58) compared to baseline values indicating that the occlusion settled by the fourth week. By the third week the OVD values obtained did not show a significant difference compared to the baseline (p value= 0.42) indicating that the OVD had been restored. The questionnaire provided at the end of four weeks showed negative response for signs and symptoms of TMD in all the children. Conclusion: Any changes in occlusion following the placement of a Hall crown settles in four weeks. The OVD settles three weeks post placement implying that extrusion of teeth do not play a role in settling of the occlusion. The children do not develop any signs or symptoms of TMD post a Hall crown.


Assuntos
Cárie Dentária , Dente Decíduo , Criança , Coroas , Humanos , Metais , Dente Molar , Dimensão Vertical
15.
Oper Dent ; 45(5): 457b-466, 2020 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-32243251

RESUMO

CLINICAL RELEVANCE: This article presents the dental restoration of a young female patient complaining of erosive dental wear using a three-step restorative technique, an alternative approach with some novel adjustments. SUMMARY: For successful tooth wear treatment, determining the etiological systemic and local factors is the main priority before deciding on effective and long-term preventive and/or therapeutic restorative approaches. In addition to professional intervention, achieving optimal outcomes requires patients to control their diet and/or gastric issues, thus minimizing the wear process. However, continuous wear constitutes the most challenging scenario, mainly when it affects young patients' dentitions. This article describes the dental restoration of posterior teeth with reestablishment of occlusal vertical dimension before treating the anterior teeth, while educating the patient and providing medical monitoring. The three-step restorative technique seems to be properly applicable in cases of significant dental compromise due mainly to erosive wear and is based on direct procedures, which can assure a reliable and feasible approach.


Assuntos
Desgaste dos Dentes , Restauração Dentária Permanente , Dieta , Feminino , Humanos , Desgaste dos Dentes/terapia , Dimensão Vertical
16.
Int J Paediatr Dent ; 30(6): 805-815, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32248585

RESUMO

BACKGROUND: The stainless steel crowns (SSCs) placed using the Hall technique disrupt the occlusion, but stabilization appears to occur within a short period post-placement. Negligible understanding and comprehension is presently handy about the changes in overbite and bite force after placement of stainless steel crown using the Hall technique in children. AIM/HYPOTHESIS: To evaluate the digital occlusal analysis of vertical dimension and maximum intercuspal position to understand the changes in overbite and bite force after placement of stainless steel crown using the Hall technique. DESIGN: Twenty children who needed treatment for the carious tooth with decay extending to enamel and dentin and multisurface caries were managed using the Hall technique. Following that, overbite measurement for vertical dimension was carried out clinically using digital vernier calipers. Later, the T-Scan III was used for measuring occlusal load at the maximum intercuspal position. The bite force and occlusal premature contacts were digitally analysed and recorded pre-operatively, immediately after placement of SSC and after 1 month follow-up period. RESULTS: A significant result in the vertical dimension, bite force on crowned tooth, and significant reduction in the prematurities were seen from baseline to one-month follow-up. CONCLUSION: There was an occlusal re-equilibration attained after 1 month.


Assuntos
Aço Inoxidável , Dente Decíduo , Criança , Coroas , Humanos , Dente Molar , Dimensão Vertical
17.
Am J Orthod Dentofacial Orthop ; 157(4): 561-570, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32241363

RESUMO

This case report illustrates the successful nonsurgical treatment of an adult with a skeletal Class III malocclusion exacerbated by a functional anterior shift that resulted in a severe overclosure of the mandible and a reverse smile line. To maximize the soft tissue and smile esthetics while idealizing the occlusion, active clockwise rotation of the mandible was induced along with mandibular molar uprighting and sequential leveling. In the maxilla, full arch distalization was achieved after second molar extraction. The treatment provided a satisfying esthetic and functional outcome and has remained stable.


Assuntos
Má Oclusão de Angle Classe III , Técnicas de Movimentação Dentária , Adulto , Cefalometria , Estética Dentária , Humanos , Mandíbula , Maxila , Dimensão Vertical
18.
Beijing Da Xue Xue Bao Yi Xue Ban ; 52(2): 368-372, 2020 Apr 18.
Artigo em Chinês | MEDLINE | ID: mdl-32306024

RESUMO

OBJECTIVE: To measure the dimensional data of complete dentures and to design a novel tray for recording maxillomandibular relationship of edentulous patients. METHODS: For the measurement, 100 pairs of complete dentures from the clinic were surveyed for the following parameters: a1, the distance between the middle fossa of the upper left and right first molars; a2, the anterior-posterior distance between the middle fossa of the upper first molars and the incisal edge; a3, the width of the upper denture; a4, the anterior-posterior length of the upper denture; a51, the height from the mesio-lingual cusp of the right upper first molar to the saddle surface; a52, the height from the central fossa of the right lower first molar to the saddle surface; a6, the height from the notch of the upper lip frenulum to the upper central incisor edge; a7, the least thickness of the labial saddle base in the upper central incisor region. Based on the data, the trays with different sizes were designed and fabricated, and the key parameters were: b1, the distance between the foramina of screw posts, b2, the anterior-posterior distance between the foramina of the screw posts and the incisal edge; b3, the width of the tray; b4, the anterior-posterior length of the tray; b51, the height of the posterior platform with the screw nut; b52, the height of the screw post; b6, the height of the anterior tray handle; b7, the thickness of the anterior tray handle. RESULTS: The minimum, average and maximum data for each parameter were (in millimeter): a1: 37.1, 44.5, and 59.6; a2: 22.6, 29.0, and 38.1; a3: 48.5, 58.2, and 76.6; a4: 37.4, 50.8, and 61.0; a51: 5.6, 9.5, and 14.7; a52: 3.8, 9.9, and 18.8; a6: 8.9, 16.6, and 24.7; a7: 1.2, 2.8, and 5.9. Based on the data, the trays in small, medium and large sizes were designed and fabricated. In clinical application, the putty silicone rubber impression material was used to reline the tray, meanwhile the posterior platform and anterior tray handle were set as the occlusal plane, then the screw posts were added and adjusted till the proper vertical dimension, after that, the putty silicone rubber impression material was added around the screw posts to record the horizontal maxillomandibular relationship, finally, the anterior surface of the tray handle was used to record the midline of the face and lower edge of the upper lip at rest and with smile. CONCLUSION: The dimensional data offered reference for the analysis of restoration space in edentulous patients. The tray designed and fabricated in this study may serve as a new tool for recording the maxillomandibular relationship.


Assuntos
Prótese Total , Boca Edêntula , Técnica de Moldagem Odontológica , Humanos , Incisivo , Lábio , Dimensão Vertical
19.
Odontology ; 108(4): 669-675, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32236830

RESUMO

The aim of this study is to evaluate through computed tomography differences in cortical plate thickness of condyle in patients with a different facial vertical skeletal pattern. The final sample of this retrospective study included CBCT exams of 60 adult subjects (mean age 33.2 ± 5.6), selected from the digital archive of a private practice. The subjects were assigned to 3 different groups according to the values of the Frankfurt-mandibular plane angle: hyper-, normo-, and hypodivergent groups. The volume rendering of the mandible was obtained and three condylar points were marked on it: median pole, lateral pole and the most cranial point. For each considered reference point, the minimum distance between external and internal cortical surface was measured, obtaining three different outcomes: condylar cortical bone thickness of median pole (CCBToMP), lateral pole (CCBToLP) and cranial pole (CCBToCP). The measurements were executed by means of Mimics software by the same expert operator in specific scan views. The cortical bone thickness of hyperdivergent patients was found to be statistically thicker than normodivergent patients and hypodivergent patients. Cortical bone thickness of normodivergent patients was found thicker than hypodivergent patients. All the differences were statistically significant (p < 0.05). The Pearson correlation coefficient showed a statistically significant correlation (p < 0.001) between the Frankfurt-mandibular plane angle and the evaluated cortical bone thickness outcomes. Facial biotype characteristics that define vertical facial skeletal pattern affect the cortical bone thickness of mandibular condyle.


Assuntos
Tomografia Computadorizada de Feixe Cônico , Mandíbula , Adulto , Cefalometria , Osso Cortical , Humanos , Estudos Retrospectivos , Dimensão Vertical
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