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Journal of the Formosan Medical... Apr 2024Newly developed temporary anchorage devices (TADs) serve a strong orthodontic anchorage to intrude molars for correction of anterior open bite (AOB). We measured...
BACKGROUND/PURPOSE
Newly developed temporary anchorage devices (TADs) serve a strong orthodontic anchorage to intrude molars for correction of anterior open bite (AOB). We measured cephalometric changes in skeletal open bite patients which developed subsequently to temporomandibular joint disorders with bilateral point contacts at terminal molars.
METHODS
We retrospectively recruited 32 patients who had been treated their TMD before orthodontic correction (overbite: -3.14 ± 1.86 mm). Partial orthodontic appliances were used to intrude posterior teeth using TADs until positive OB obtained (T1). Full fixed appliances were then used to achieve proper overjet and overbite (T2). We collected lateral cephalograms before (T0), during (T1) and after (T2) treatment, and at follow-ups (T3). Using ANOVA, we analyzed the differences among these time points to determine treatment changes and stability of orthodontic results.
RESULTS
In this group predominantly comprising young adult women, orthodontic treatment with TADs significantly reduced upper posterior dental heights (T2-T0:-1.84 ± 0.66 mm) and facilitated the retraction and uprighting upper incisors (T2-T0: -9.92 ± 1.72°), to achieve appropriate OJ (T2-T0: -3.21 ± 0.49 mm) and OB (T2-T0: 4.10 ± 0.28 mm) with p < 0.05. Except upper posterior dental height, most of cephalometric changes including OJ, OB, and upper incisal axis remained significant at follow-ups with retention time of 3.7 ± 2.6 years. Only three out of 30 patients experienced small amount of open bite at T3.
CONCLUSION
Orthodontic correction of OJ remained relatively stable among 90 % of patients with TMJ degeneration by intrusion via TADs. This modern but conservative orthodontic approach can improve occlusal functions in skeletal open bites.
Topics: Young Adult; Humans; Female; Open Bite; Overbite; Retrospective Studies; Mandible; Malocclusion, Angle Class II; Temporomandibular Joint
PubMed: 37865535
DOI: 10.1016/j.jfma.2023.10.006 -
Dental Press Journal of Orthodontics 2014Non-nutritive sucking habits can cause occlusal alterations, including anterior open bite. However, not all patients develop this malocclusion. Therefore, the emergence...
INTRODUCTION
Non-nutritive sucking habits can cause occlusal alterations, including anterior open bite. However, not all patients develop this malocclusion. Therefore, the emergence of AOB does not depend on deleterious habits, only.
OBJECTIVE
Investigate a potential association between non-nutritive sucking habits (NNSHs), anterior open bite (AOB) and facial morphology (FM).
METHODS
176 children in the primary dentition stage were selected. Intra and extraoral clinical examinations were performed and the children's legal guardians were asked to respond to a questionnaire comprising issues related to NNSHs.
RESULTS
A statistically significant relationship was found between NNSHs and AOB. However, no association was found between these factors and children's facial morphology (FM).
CONCLUSIONS
Non-nutritive sucking habits during the primary dentition stage play a key role in determining anterior open bite malocclusion regardless of patient's morphological facial pattern.
Topics: Cephalometry; Child; Child, Preschool; Chin; Cross-Sectional Studies; Face; Female; Humans; Male; Nose; Open Bite; Sucking Behavior; Tooth, Deciduous; Vertical Dimension; Zygoma
PubMed: 25162574
DOI: 10.1590/2176-9451.19.3.108-113.oar -
Minerva Stomatologica Dec 2017In the present paper, the authors analyze the effect of the "Swallowing Occlusal Contact Intercept Appliance" (SOCIA) in treatment of children with hyperdivergent Class... (Clinical Trial)
Clinical Trial
BACKGROUND
In the present paper, the authors analyze the effect of the "Swallowing Occlusal Contact Intercept Appliance" (SOCIA) in treatment of children with hyperdivergent Class II malocclusion. This functional appliance has no intra-oral anchorage, but induces a continuous periodontal, muscular, and articular stimulation.
METHODS
Twenty-six patients with hyperdivergent growth and class II malocclusion were selected and treated with SOCIA appliance. Cephalometric analysis was performed before treatment (T1) and immediately after the treatment (T2).
RESULTS
After 24 months treatment authors observed a modification of maxillary growth with a reduction of the divergence with an increase of the posterior facial height, a modification of condylar inclination and forward position of the a hyoid. No modifications was observed about the ANB angle. After treatment the open bite was resolved with a reduction of the inclination of the upper incisors.
CONCLUSIONS
SOCIA is a reliable functional appliance in growing age patients with a hyperdivergent pattern growth, anterior open bite and class II molar malocclusion.
Topics: Cephalometry; Child; Equipment Design; Female; Humans; Incisor; Male; Malocclusion, Angle Class II; Mandibular Condyle; Masticatory Muscles; Maxilla; Molar; Open Bite; Orthodontic Appliances, Functional; Radiography, Panoramic
PubMed: 28975770
DOI: 10.23736/S0026-4970.17.03989-9 -
The Journal of Clinical Pediatric... Jan 2023The treatment of adolescent skeletal open-bite malocclusion with severe molar-incisor hypomineralization (MIH) remains challenging. Though conducive to open-bite... (Review)
Review
The treatment of adolescent skeletal open-bite malocclusion with severe molar-incisor hypomineralization (MIH) remains challenging. Though conducive to open-bite treatment and endodontic management, early molar extraction may trigger a series of negative impacts on occlusion and stomatognathic development. In addition, molars' crown restoration was shown to worsen open-bite malocclusion considering the intrinsic vertical increment of hyperdivergent growth. This case report describes the successful multidisciplinary therapy combined with orthopedic and orthodontic treatment of a 10.2-year-old girl with mixed dentition, a protruding profile and skeletal open-bite malocclusion with severe MIH and crowding. During the mixed and early permanent dentition, function regulator-4 (FR-4), resin-bonding transpalatal arch (TPA) and modified spring-loaded bite blocks were implemented to correct abnormal swallowing and control the facial vertical growth. Radiographic results, including the counterclockwise rotation of the occlusion plane, decreasing mandibular angle and increasing posterior-anterior face height ratio accompanied by obvious mandibular vertical growth, indicated that the performed orthopedic treatments efficiently controlled hyperdivergent open-bite growth during puberty. After the maxillary and mandibular second molars were occluded, all first permanent molars were extracted, and fixed appliances combined with implant anchorage were used to correct malocclusion and convex profile. Ultimately, a stable Class I functional occlusion and satisfying facial improvement were achieved and maintained following a 2-year follow-up.
Topics: Female; Humans; Adolescent; Child; Molar Hypomineralization; Cephalometry; Mandible; Open Bite; Molar; Tooth Movement Techniques; Orthodontic Anchorage Procedures; Malocclusion, Angle Class II
PubMed: 36627225
DOI: 10.22514/jocpd.2022.017 -
Saudi Medical Journal Apr 2016The treatment of deep anterior crossbite is technically challenging due to the difficulty of placing traditional brackets with fixed appliances. This case report...
The treatment of deep anterior crossbite is technically challenging due to the difficulty of placing traditional brackets with fixed appliances. This case report represents a none traditional treatment modality to treat deep anterior crossbite in an adult pseudo class III malocclusion complicated by severely retruded, supraerupted upper and lower incisors. Treatment was carried out in 2 phases. Phase I treatment was performed by removable appliance "modified Hawley appliance with inverted labial bow," some modifications were carried out to it to suit the presented case. Positive overbite and overjet was accomplished in one month, in this phase with minimal forces exerted on the lower incisors. Whereas, phase II treatment was performed with fixed appliances (braces) to align teeth and have proper over bite and overjet and to close posterior open bite, this phase was accomplished within 11 month.
Topics: Adolescent; Female; Humans; Malocclusion, Angle Class III; Orthodontic Appliance Design; Orthodontic Appliances, Removable
PubMed: 27052290
DOI: 10.15537/smj.2016.4.13685 -
Dentistry Journal May 2024The masticatory function of patients with skeletal anterior open bite (OPEN) is reported to be impaired compared with that of patients with normal occlusion (NORM). In...
The masticatory function of patients with skeletal anterior open bite (OPEN) is reported to be impaired compared with that of patients with normal occlusion (NORM). In this study, we compared brain blood flow (BBF) in patients with OPEN and NORM and investigated the factors related to BBF during mastication in patients with OPEN. The study included 17 individuals with NORM and 33 patients with OPEN. The following data were collected: number of occlusal contacts, jaw movement variables during mastication, and BBF measured with functional near-infrared spectroscopy during chewing. The number of occlusal contacts, maximum closing and opening speeds, closing angle, and vertical amplitude were smaller in the OPEN than in the NORM group. Interestingly, BBF increased less in the OPEN group. Correlation analysis revealed that several parameters, including number of occlusal contacts and closing angle, were correlated with changes in BBF during mastication. These results suggest that not only occlusion but also jaw movement variables and factors related to masticatory muscles contribute to the chewing-related increase in BBF. In conclusion, BBF increases less during mastication in patients with OPEN than in those with NORM. In addition, the higher increase in BBF is correlated with jaw movement. Together, we discovered that OPEN exhibits significant adverse effects not only on masticatory function but also on brain function.
PubMed: 38920862
DOI: 10.3390/dj12060161 -
Cephalometric appraisal of tongue and related soft tissues in normal and open bite subjects at rest.Journal of Clinical and Diagnostic... Jan 2015To compare the tongue position of normal and open bite subjects at rest and to study if there is any difference in the hyoid bone and posterior pharyngeal wall positions...
AIM
To compare the tongue position of normal and open bite subjects at rest and to study if there is any difference in the hyoid bone and posterior pharyngeal wall positions in normal and open bite subjects.
MATERIALS AND METHODS
Sample size consisted of 48 individuals with 24 subjects having normal occlusion and 24 subjects having open bite malocclusion within the age range of 16 to 25 y. Standardized Lateral cephalograms were taken for all the subjects. The subjects were asked to protrude their tongue as much as possible. The dorsum of the tongue was then coated with a palatable suspension of Barium Sulphate (MICROBAR). The subjects were asked to swallow on command, after 10 sec of the swallow, lateral cephalograms were taken.
STATISTICAL ANALYSIS
t-test
RESULTS
The antero-posterior relationship of maxilla and mandible to the cranial base is normal in both the groups. The open bite subjects had a larger over jet and as compared to the normal subjects, and had steeper mandibular planes.It was also seen that as the total tongue occupancy area increased so did the partial tongue occupancy area.
CONCLUSION
A significant positive correlation was found between the horizontal position of the tongue tip and the lower incisor position in the normal group, also for the ratio of total tongue area to total oral area & the ratio of upper tongue area to the anterior oral area in the normal and openbite groups. There was no difference in the position of the tongue, hyoid bone and posterior wall in the normal and openbite groups. The mandibular plane angle and palatal plane - mandibular plane angles were found to be larger in the openbite subjects as compared to normal subjects. Supra-eruption of the maxillary molars was seen in the openbite group leading to a downward and backward rotation of the mandible. The maxillary and mandibular incisors were more proclinated in the normal as well as openbite groups.
PubMed: 25738079
DOI: 10.7860/JCDR/2015/7647.5456 -
The Angle Orthodontist Jan 2022Amelogenesis imperfecta is a rare hereditary disorder that affects dental enamel and is often associated with an anterior open bite. Orthodontic treatment of a...
Amelogenesis imperfecta is a rare hereditary disorder that affects dental enamel and is often associated with an anterior open bite. Orthodontic treatment of a 16-year-old female patient with hypocalcified amelogenesis imperfecta and a 9-mm anterior open bite was presented. Radiographic examination revealed a steep mandibular plane angle, an increased lower face height, a Class II skeletal pattern, and a convex profile. Additionally, the patient had stainless steel crowns on all upper and lower posterior teeth and composite veneers on the upper anterior teeth. The patient was treated nonsurgically using a multiloop edgewise archwire (MEAW). MEAW mechanics allowed for successful correction of the anterior open bite, with significant reduction in the mandibular plane angle and improvement in the patient's profile. No fixed retainers were used, and the results remained stable 78 months after removal of orthodontic appliances. MEAW mechanics should be considered for patients with large anterior open bites, although this technique requires excellent patient compliance.
Topics: Adolescent; Amelogenesis Imperfecta; Cephalometry; Female; Humans; Open Bite; Orthodontic Wires; Tooth Movement Techniques
PubMed: 34533566
DOI: 10.2319/032221-228.1 -
Dental Press Journal of Orthodontics Aug 2019The objective of this research was to demonstrate the efficiency of the overbite depth indicator (ODI) and the anteroposterior dysplasia indicator (APDI) from Kim's...
OBJECTIVE
The objective of this research was to demonstrate the efficiency of the overbite depth indicator (ODI) and the anteroposterior dysplasia indicator (APDI) from Kim's cephalometric analysis, regarding the determination of the vertical and sagittal patterns of Latin American individuals.
METHODS
Two hundred lateral cephalometric radiographs were selected and divided into four study groups, with 50 radiographs each, for carrying out a cross-sectional study. The control group included radiographs of balanced individuals, and the other three groups had lateral cephalometric radiographs of subjects with Class I, II and III malocclusions and with skeletal open bite. After the pilot test was performed to calibrate the investigator, the ODI and APDI were measured. Descriptive statistics were performed and the one-way ANOVA with post-hoc Tukey HSD, or Kruskal-Wallis and Mann-Whitney U-test were used. Also a multiple linear regression was employed.
RESULTS
Statistically significant differences were found for the ODI of all groups (p< 0.001), except between Class I group (65.87 ± 4.26) and Class II open bite group (67.19 ± 3.58), both with similar values to each other. For APDI, statistically significant differences were also found for all groups (p< 0.001). However, no statistically significant differences were found between the balanced group (83.18 ± 1.71) and Class I group with skeletal open bite (81.78 ± 2.69).
CONCLUSIONS
ODI and APDI are reliable indicators to evaluate the sagittal and vertical patterns of an individual, demonstrating their efficiency when a Latin American population was evaluated.
Topics: Cephalometry; Cross-Sectional Studies; Humans; Latin America; Malocclusion, Angle Class II; Mandible; Open Bite; Overbite
PubMed: 31390449
DOI: 10.1590/2177-6709.24.3.046-054.oar -
Journal of Maxillofacial and Oral... Dec 2020We aimed to investigate postoperative stability after orthognathic surgery in patients with skeletal class III malocclusion with severe open bite by comparison between...
INTRODUCTION
We aimed to investigate postoperative stability after orthognathic surgery in patients with skeletal class III malocclusion with severe open bite by comparison between bilateral sagittal splitting osteotomy (BSSRO) and BSSRO with Le Fort 1 osteotomy.
MATERIALS AND METHODS
Seventeen patients with skeletal class III malocclusion with severe open bite who were needed more than 6 degree counterclockwise rotation of distal segment by only BSSRO in preoperative cephalometric prediction. The subjects were divided into group A, where 9 patients were treated by BSSRO, and group B, where 8 patients were treated by BSSRO with Le Fort 1 osteotomy. Patient's characteristics of age, gender, preoperative over jet (OJ) and over bite (OB) were not found to be significantly different between the two groups. Counterclockwise rotation of distal segment in preoperative cephalometric prediction by only BSSRO was not found to be significantly different between group A of 7.6 (6-10.6) degree and group B of 9 (6-13) degree. The amount of rotation was reduced to 5.4 (3-10) degree by bimaxillary surgery using BSSRO and Le Fort 1 osteotomy in group B. OJ and OB were measured as occlusal stability factor. Distance between ANS-to-PNS plane and the edge of upper incisor (NF-U1Ed), and distance between Menton and edge of lower incisor (Me-L1Ed) were measured as skeletal stability factor using cephalometric analysis. These lengths were measured at pre-surgery (T0), 2 weeks after surgery (T1) and 1 year after surgery (T2), and these differences between the two groups were statistically analyzed.
RESULTS
OJ and OB kept a good relation at any experimental periods. The change of Me-L1Ed was significantly larger in group A (1.21 mm at T0-T1, 1.02 mm at T0-T2) than in group B (0.14 mm at T0-T1, 0.16 mm at T0-T2). The change of NF-U1Ed was not significantly different between group A (1.07 mm at T0-T1, 0.57 mm at T0-T2) and group B (0.51 mm at T0-T1, - 0.05 mm at T0-T2).
CONCLUSION
In case with more than 6 degree counterclockwise rotation of distal segment, skeletal stability was better after bimaxillary surgery than only BSSRO; however, OJ and OB kept a good relation.
PubMed: 33071508
DOI: 10.1007/s12663-019-01300-2