Acquired anterior open bite in adults

2020 ◽  
Author(s):  
Μερόπη Αρμάου
Keyword(s):  
Open Bite ◽  
Control Group ◽  
P Value ◽  
Anterior Open Bite

Εισαγωγή: Η Επίκτητη Πρόσθια Ανοιχτή Δήξη (ΕΠΑΔ) σε ενήλικες είναι μια συγκλεισιακή διαταραχή που χαρακτηρίζεται από σταδιακή απώλεια μασητικών επαφών, αρνητική κατακόρυφη πρόταξη, μειωμένη μασητική απόδοση και αισθητικές διαταραχές. Οδοντικές επαφές παρατηρούνται μόνο στους τελευταίους γομφίους. Ιδιαίτερο ενδιαφέρον προκαλεί το γεγονός πως εκμαγεία που προέρχονται από οδοντικούς φραγμούς ασθενών με ΕΠΑΔ, μπορούν να έρθουν σε μέγιστη συγγόμφωση αν αρθρωθούν με το χέρι. Η ΕΠΑΔ σε ενήλικες διαφοροποιείται από αυτή των ανηλίκων από την απουσία των αυξητικών λοβών στις κοπτικές ακμές των προσθίων δοντιών. Πρόσφατη αλλαγή στη σχέση άνω και κάτω οδοντικού τόξου και παρουσία σημείων αποτριβής στις κοπτικές ακμές των προσθίων δοντιών, σε ασθενείς με πρόσθια ανοιχτή δήξη αποδεικνύουν προϋπάρχουσα φυσιολογική σύγκλειση. Η αιτιολογία της ΕΠΑΔ δεν είναι τεκμηριωμένη, ενώ δύσκολα μπορεί να διερευνηθεί. Δεδομένου ότι η σχέση μεταξύ άνω και κάτω οδοντικού φραγμού ορίζεται από την κροταφογναθική διάρθρωση (ΚΓΔ) και το νευρομυϊκό σύστημα, οι έρευνες μπορούν να επικεντρωθούν σε δύο βασικούς ανατομικούς παράγοντες: τη συμμετρική αλλοίωση της ΚΓΔ ή τη δυσαρμονία του κρανιοπροσωπικού συμπλέγματος και της μυϊκής δραστηριότητας. Σκοπός: Δεν υπάρχει στοχευμένη έρευνα επί της αιτιολογίας ανάπτυξης της ΕΠΑΔ, επομένως είναι αδύνατη η πρόβλεψή της στο γενικό πληθυσμό. Οποιαδήποτε απόπειρα διερεύνησης πιθανών αιτιολογικών παραγόντων μπορεί να πραγματοποιηθεί μόνο αναδρομικά. Σκοπός της παρούσας ερευνητικής εργασίας ήταν η διερεύνηση της πιθανής συσχέτισης της ΕΠΑΔ σε ενήλικες με τη δομική ακεραιότητα της ΚΓΔ, τη θέση του κονδύλου εντός της κροταφικής γλήνης καθώς και τη συμμετρική διακονδυλική θέση εντός της γλήνης. Υπόθεση: Υπάρχει συσχέτιση μεταξύ αλλαγής των δομικών στοιχείων της ΚΓΔ και εμφάνισης ΕΠΑΔ. Άτομα με ΕΠΑΔ αναμένεται να παρουσιάζουν οστικές αλλοιώσεις της κεφαλής του κονδύλου και της κροταφικής γλήνης, συμμετρικά. Υπάρχει συσχέτιση μεταξύ ΕΠΑΔ και θέσης του κονδύλου εντός της κροταφικής γλήνης. Άτομα με ΕΠΑΔ δεν αναμένεται να εμφανίζουν ιδανική σχέση κονδύλου με τα τοιχώματα της κροταφικής γλήνης, συγκριτικά με μετρήσεις που προκύπτουν από ακέραιες ανατομικά και υγιείς παθολογικά αρθρώσεις από τη μελέτη των Ikeda and Kawamura (2009). Οι μετρήσεις αυτές χρησιμοποιήθηκαν ως Control Group. Άτομα με ΕΠΑΔ αναμένεται να εμφανίζουν συμμετρική διακονδυλική θέση εντός της γλήνης. Μέθοδος: Πενηντα-επτά άτομα με ΕΠΑΔ συγκεντρώθηκαν από τα ηλεκτρονικά αρχεία ιδιωτικής οδοντιατρικής κλινικής. Επιλέχθηκαν μόνο ασθενείς ηλικίας 20 ετών και άνω, ώστε να διασφαλιστεί η πλήρης ανατομική διαμόρφωση της ΚΓΔ. Για 28 μόνο άτομα, από το σύνολο των ασθενών με ΕΠΑΔ, υπήρχε πρόσβαση σε ψηφιακά αρχεία υπολογιστικής τομογραφίας κωνικής δέσμης ΚΓΔ. Η ηλικία των ασθενών κυμαινόταν από 20 έως 61 έτη με μέση τιμή τα 35,93 έτη. Δύο ασθενείς ήταν άνδρες με μέση ηλικία τα 36,5 έτη και 26 ήταν γυναίκες με μέση ηλικία τα 36,5 έτη. Ένας έμπειρος προσθετολόγος μελέτησε τις υπολογιστικές τομογραφίες των ΚΓΔ, ξεχωριστά για κάθε πλευρά ασθενούς και κλήθηκε να αξιολογήσει τα παρακάτω απεικονιστικά χαρακτηριστικά: Ποιοτικά χαρακτηριστικά: αλλαγές στον όγκο του κονδύλου και οστικές αλλαγές στην κροταφική γλήνη. Κλίμακα τριών διαβαθμίσεων (0, 1 και 2) χρησιμοποιήθηκε για τον προσδιορισμό του βαθμού αλλοίωσης της κεφαλής του κονδύλου και της κροταφικής γλήνης σε τρία διαφορετικά παράλληλα οβελιαία επίπεδα με ενδιάμεση απόσταση μεταξύ αυτών τα 4 χιλ. Ποσοτικά χαρακτηριστικά: Η ανάλυση του διάρθριου χώρου πραγματοποιήθηκε σε τρεις θέσεις του κονδύλου (πρόσθια (Α), άνω (S) και οπίσθια (P)) σε τρία παράλληλα οβελιαία επίπεδα, με ενδιάμεση απόσταση 4 χιλ. μεταξύ αυτών. Επιπλέον των αρχικών μετρήσεων υπολογίστηκε η διαφορά A-P, οι λόγοι A/P, S/A, S/P και η λογαριθμική αναλογία του διαθέσιμου αρθρικού χώρου (εξίσωση Pullinger) για κάθε κόνδυλο και για κάθε οβελιαία παράλληλο. Αποτελέσματα: Ποιοτικά χαρακτηριστικά: Η πλειοψηφία των ατόμων εμφανίζει δομικά ακέραιες αρθρώσεις ή ήπιες οστικές αλλοιώσεις. Σύμφωνα με τη στατιστική επεξεργασία, παρατηρείται συμμετρία ως προς τις οστικές αλλοιώσεις μεταξύ δεξιάς και αριστερής ΚΓΔ στο ίδιο άτομο. Ποσοτικά χαρακτηριστικά: Η απόσταση κονδύλου με το πρόσθιο αρθρικό τοίχωμα σε ασθενείς με ΕΠΑΔ εμφανίζεται αυξημένη σε βαθμό στατιστικά σημαντικό (P value: 0.001), τόσο για τη δεξιά όσο και για την αριστερή ΚΓΔ. Το ίδιο ισχύει και για την απόσταση του κονδύλου με την οροφή της κροταφικής γλήνης (P value: 0.035) στην αριστερή ΚΓΔ (τα αποτελέσματα αυτά βασίζονται στις μετρήσεις της κεντρικής οβελιαίας τομής του κονδύλου μόνο). Από τις συγκρίσεις των μετρήσεων μεταξύ δεξιάς και αριστερής ΚΓΔ, διαπιστώνεται συμμετρική θέση των κονδύλων εντός της γλήνης. Η μόνη στατιστικά σημαντική ασυμμετρία διαπιστώθηκε στη σχέση των έσω πόλων των κονδύλων με το άνω αρθρικό τοίχωμα. Συμπεράσματα: Η απόσταση κονδύλου με πρόσθιο αρθρικό τοίχωμα σε ασθενείς με ΕΠΑΔ εμφανίζεται μειωμένη σε βαθμό στατιστικά σημαντικό, τόσο για τη δεξιά όσο και για την αριστερή ΚΓΔ, καθώς και για την απόσταση του κονδύλου με την οροφή της κροταφικής γλήνης στην αριστερή μόνο ΚΓΔ. Παρά την αυξημένη απόσταση με το πρόσθιο τοίχωμα, οι ασθενείς με ΕΠΑΔ διατηρούν φυσιολογική απόσταση με το οπίσθιο τοίχωμα σύμφωνα με τις τιμές αναφοράς των Ikeda και Kawamura (2009), επομένως θα μπορούσε να υποτεθεί πως δεν υπάρχει οπίσθια παρεκτόπιση του κονδύλου, αλλά περιστροφική κίνηση η οποία οδηγεί σε αυξημένη πρόσθια απόσταση εξ αιτίας της ανατομίας της κεφαλής του κονδύλου. Η πλειοψηφία των ατόμων με ΕΠΑΔ εμφάνισε δομικά ακέραιες αρθρώσεις ή ήπιες οστικές αλλοιώσεις, καταλήγοντας πως οι δομικές αλλαγές της ΚΓΔ αποτελούν ικανή αλλά όχι και αναγκαία συνθήκη για την ενεργοποίηση και εξέλιξη της πρόσθιας ανοιχτής δήξης. Επιπλέον παρατηρείται συμμετρία ως προς τις οστικές αλλοιώσεις μεταξύ δεξιάς και αριστερής ΚΓΔ στο ίδιο άτομο. Από τις συγκρίσεις των μετρήσεων μεταξύ δεξιάς και αριστερής ΚΓΔ, διαπιστώνεται συμμετρική θέση των κονδύλων εντός της γλήνης, ενώ η μόνη στατιστικά σημαντική ασυμμετρία διαπιστώνεται στη σχέση των έσω πόλων των κονδύλων με το άνω αρθρικό τοίχωμα. Η ασυμμετρία αυτή θα μπορούσε να οφείλεται στο γεγονός ότι τα ανατομικά σημεία αναφοράς για την αξιολόγηση της μορφολογίας των κονδύλων πέραν των 3,5 χιλ από το μετωπιαίο κέντρο του, παύουν να είναι ευκρινή.

scholarly journals Gingival health status in patients with and without anterior open bite: A case-control study

2020 ◽  
Vol 11 (SPL3) ◽  
pp. 717-723
Author(s):  
Kuzhalvaimozhi P ◽  
Vignesh Ravindran ◽  
Subhashini V C
Keyword(s):  
Health Status ◽  
Open Bite ◽  
Plaque Index ◽  
Control Group ◽  
P Value ◽  
Case Group ◽  
Anterior Open Bite ◽  
Posterior Teeth ◽  
Gingival Health ◽  
The Difference

Open bite is the absence of vertical overlap of lower incisors by upper incisors when posterior teeth are in occlusion. An anterior open bite can cause periodontal damage which leads to gingivitis and periodontitis. To assess the gingival health status in patients with anterior open bite and also compares with patients without an anterior open bite. Retrospective data collected from 89,000 case records from June 2019 to March 2020. The present study consisted of 76 patients divided into two groups: patients with anterior open bite and patients without an anterior open bite. In both groups, the following parameters were recorded - Oral Hygiene Index - Simplified (OHI-S) and Plaque Index (Silness and Loe). OHI-S index and plaque index was similar in patients with and without an anterior open bite. Mean Plaque Index for case group (patients with anterior open bite) is 0.76, and Mean Plaque Index for control group (patients without the anterior open bite) is 0.78. Mean OHI-S Index for case group (patients with anterior open bite) is 0.51, and Mean OHI-S Index for the control group (patients without the anterior open bite) is 0.53. The difference was not statistically significant (P-value > 0.05). In this study, gingival health status in patients with and without an anterior open bite is low.

scholarly journals Treatment and Posttreatment Effects of Quad-Helix/Crib Therapy of Dentoskeletal Open Bite

2007 ◽  
Vol 77 (4) ◽  
pp. 640-645 ◽  
Author(s):  
Paola Cozza ◽  
Manuela Mucedero ◽  
Tiziano Baccetti ◽  
Lorenzo Franchi
Keyword(s):  
Nonparametric Test ◽  
Treated Group ◽  
Open Bite ◽  
Control Group ◽  
Anterior Open Bite ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Thumb Sucking ◽  
Clinically Significant ◽  
Quad Helix

Abstract Objective: To investigate the effects of the quad-helix/crib (Q-H/C) appliance in subjects with thumb-sucking habits and dentoskeletal open bite at 2 years after the end of active treatment. Materials and Methods: The records of 21 subjects treated with the Q-H/C appliance were compared with a control group of 21 untreated subjects with similar vertical relationships. Lateral cephalograms were obtained before treatment (T1; mean age 8.4 ± 1.4 years) and at about 2 years after treatment (T2; mean age 11.7 ± 1.9 years) and analyzed. Mean treatment duration was 1.5 years ± 7 months. The T2–T1 changes in the two groups were compared with a nonparametric test for independent samples. Results: The mean increase in overbite during Q-H/C therapy (4.1 mm) represented an overcorrection of the amount of anterior open bite at T2. Both the maxillary and mandibular incisors showed significantly greater extrusion in the Q-H/C group than in the control group. The treated group showed a greater downward rotation (1.8°) of the palatal plane than did the control group. This change was associated with a clinically significant reduction in the palatal plane/mandibular plane angle (−2.5°) in the Q-H/C group. The upper lip showed significant retraction relative to the E-plane in the treated group (3.6 mm) compared with the controls. Conclusions: The Q-H/C appliance was effective in correcting dental open bite in 85% of the growing subjects with thumb-sucking habits and dentoskeletal open bites. Correction of anterior open bite was associated with a clinically significant improvement in maxillomandibular vertical skeletal relationships.

scholarly journals Three-dimensional ultrasound evaluation of tongue posture and its impact on articulation disorders in preschool children with anterior open bite

2018 ◽  
Vol 52 (3) ◽  
pp. 250-256
Author(s):  
Sanda Lah Kravanja ◽  
Irena Hocevar-Boltezar ◽  
Maja Marolt Music ◽  
Ana Jarc ◽  
Ivan Verdenik ◽  
...  
Keyword(s):  
Preschool Children ◽  
Clinical Assessment ◽  
Three Dimensional ◽  
Open Bite ◽  
Control Group ◽  
Odds Ratios ◽  
Functional Diagnostics ◽  
Anterior Open Bite ◽  
Significant Difference ◽  
Articulation Disorders

Abstract Background Tongue posture plays an important role in the etiology of anterior open bite (AOB) and articulation disorders, and is crucial for AOB treatment planning and posttreatment stability. Clinical assessment of tongue posture in children is unreliable due to anatomical limitations. The aim of the study was to present functional diagnostics using three-dimensional ultrasound (3DUS) assessment of resting tongue posture in comparison to clinical assessment, and the associations between the improper tongue posture, otorhinolaryngological characteristics, and articulation disorders in preschool children with AOB. Patients and methods A cross-sectional study included 446 children, aged 3–7 years, 236 boys and 210 girls, examined by an orthodontist to detect the prevalence of AOB. The AOB was present in 32 children. The control group consisted of 43 children randomly selected from the participants with normocclusion. An orthodontist, an ear, nose and throat (ENT) specialist and a speech therapist assessed orofacial and ENT conditions, oral habits, and articulation disorders in the AOB group and control group. Tongue posture was also assessed by an experienced radiologist, using 3DUS. The 3DUS assessment of tongue posture was compared to the clinical assessment of orthodontist and ENT specialist. Results The prevalence of AOB was 7.2%. The AOB group and the control group significantly differed regarding improper tongue posture (p < 0.001), and articulation disorders (p < 0.001). In children without articulation disorders from both groups, the improper tongue posture occured less frequently than in children with articulation disorders (p < 0.001). After age adjustment, a statistical regression model showed that the children with the improper tongue posture had higher odds ratios for the presence of AOB (OR 14.63; p < 0.001) than the others. When articulation disorders were included in the model, these odds ratios for the AOB became insignificant (p = 0.177). There was a strong association between the improper tongue posture and articulation disorders (p = 0.002). The 3DUS detected the highest number of children with improper resting tongue posture, though there was no significant difference between the 3DUS and clinical assessments done by orthodontist and ENT specialist. Conclusions The 3DUS has proved to be an objective, non-invasive, radiation free method for the assessment of tongue posture and could become an important tool in functional diagnostics and early rehabilitation in preschool children with speech irregularities and irregular tongue posture and malocclusion in order to enable optimal conditions for articulation development.

Occlusal traits and longitudinal dental changes in children and adolescents with congenital or childhood onset myotonic dystrophy

2020 ◽  
Author(s):  
Clara Fontinha ◽  
Monica Engvall ◽  
Lotta Sjögreen ◽  
Åsa Mårtensson ◽  
Anne-Berit Ekström ◽  
...  
Keyword(s):  
Children And Adolescents ◽  
Myotonic Dystrophy ◽  
Open Bite ◽  
Control Group ◽  
Class Iii ◽  
Healthy Individuals ◽  
Anterior Open Bite ◽  
Posterior Crossbite ◽  
Changes Over Time ◽  
Over Time

Summary Background/objectives This research aimed to study the malocclusions of children and adolescents with myotonic dystrophy type 1 (DM1), in respect to healthy individuals, and trace the occlusal changes that occurred in these individuals during growth. Materials/methods Thirty-six dental casts, from children and adolescents with DM1 living in western and southern Sweden, were compared with a control group of 50 healthy individuals. To identify potential changes in occlusal traits, 26 casts were assessed and followed-up over a median time of 9 years. Independent samples t-tests were used to compare the two groups and their changes over time. Paired samples t-tests tested changes over time within each group (P &lt; 0.05). Results DM1 patients had a higher prevalence of anterior open bite, posterior crossbite, and Class III malocclusions. When compared to controls, patients presented smaller upper and lower intermolar as well as intercanine widths. In both groups, the individuals revealed longitudinal changes with a decrease in both upper and lower arch lengths and an increase on the palatal vault height. During the follow-up period, the prevalence of malocclusions remained almost the same, only significantly differing regarding the changes that occurred between groups referred to the upper intermolar width, which decreased among DM1 patients. Conclusions/implications In comparison to healthy controls, children and adolescents with DM1 have shown already at an early age a higher prevalence of both anterior open bite and posterior crossbite. These occlusal traits did not change with time apart from the upper narrow intermolar width, which further decreased with time.

scholarly journals Dental and facial characteristics of patients with juvenile idiopathic arthritis

2004 ◽  
Vol 59 (3) ◽  
pp. 93-98 ◽  
Author(s):  
Cynthia Savioli ◽  
Clovis A.A. Silva ◽  
H. Ching Lin ◽  
Lucia M.M.A. Campos ◽  
Eliane F.B.G. Prado ◽  
...  
Keyword(s):  
Juvenile Idiopathic Arthritis ◽  
Oral Health ◽  
Temporomandibular Joint ◽  
Open Bite ◽  
Control Group ◽  
Healthy Children ◽  
Anterior Open Bite ◽  
Temporomandibular Joint Dysfunction ◽  
Facial Profile ◽  
Gingival Bleeding

OBJECTIVE: It has been shown that the temporomandibular joint is frequently affected by juvenile idiopathic arthritis, and this degenerative disease, which may occur during facial growth, results in severe mandibular dysfunction. However, there are no studies that correlate oral health (tooth decay and gingival diseases) and temporomandibular joint dysfunction in patients with juvenile idiopathic arthritis. The aim of this study is to evaluate the oral and facial characteristics of the patients with juvenile idiopathic arthritis treated in a large teaching hospital. METHOD: Thirty-six patients with juvenile idiopathic arthritis (26 female and 10 male) underwent a systematic clinical evaluation of their dental, oral, and facial structures (DMFT index, plaque and gingival bleeding index, dental relationship, facial profile, and Helkimo's index). The control group was composed of 13 healthy children. RESULTS: The mean age of the patients with juvenile idiopathic arthritis was 10.8 years; convex facial profile was present in 12 juvenile idiopathic arthritis patients, and class II molar relation was present in 12 (P = .032). The indexes of plaque and gingival bleeding were significant in juvenile idiopathic arthritis patients with a higher number of superior limbs joints involved (P = .055). Anterior open bite (5) and temporomandibular joint noise (8) were present in the juvenile idiopathic arthritis group. Of the group in this sample, 94% (P = .017) had temporomandibular joint dysfunction, 80% had decreased mandibular opening (P = 0.0002), and mandibular mobility was severely impaired in 33% (P = .015). CONCLUSION: This study confirms that patients with juvenile idiopathic arthritis a) have a high incidence of mandibular dysfunction that can be attributed to the direct effect of the disease in the temporomandibular joint and b) have a higher incidence of gingival disease that can be considered a secondary effect of juvenile idiopathic arthritis on oral health.

scholarly journals Anterior Open Bite and Speech Disorders in Children with Down Syndrome

2008 ◽  
Vol 78 (2) ◽  
pp. 221-227 ◽  
Author(s):  
Rubén López-Pérez ◽  
S. Aida Borges-Yáñez ◽  
Patricia López-Morales
Keyword(s):  
Down Syndrome ◽  
Speech Disorders ◽  
Open Bite ◽  
Control Group ◽  
Anterior Open Bite ◽  
Chi Square ◽  
Children With Down Syndrome ◽  
Mexican Children ◽  
Significant Difference ◽  
Chi Square Test

Abstract Objective: To estimate the prevalence and to determine if there is an association between anterior open bite and the presence of speech disorders in a group of Mexican children with Down syndrome (DS). Materials and Methods: The subjects were a group of Mexican children with Down syndrome (DG) and a control group (CG) of Mexican pediatric patients without disabilities matched by age. The children in both groups came from families having children with anterior open bite and children without it. A parental questionnaire, dental study casts, and a speech test were used to measure the studied variables. Data were analyzed using the chi-square test (χ2 test), and one-way analyses of variance (ANOVA), followed by the Tukey post hoc test. Results: Prevalence of anterior open bite was 31.6% in the DG and 22.8% in the CG. The total speech errors by omissions, substitutions, distortions, and additions indicated that there were significant differences between both groups (F = 31.68, P &lt; .001). In general, no significant difference in speech disorders was observed between the DG and the CG regardless of the presence of anterior open bite. Conclusions: No association existed between speech disorders and anterior open bite in the samples studied.

scholarly journals Dental and skeletal components of Class II open bite treatment with a modified Thurow appliance

2014 ◽  
Vol 19 (1) ◽  
pp. 19-25 ◽  
Author(s):  
Helder Baldi Jacob ◽  
Ary dos Santos-Pinto ◽  
Peter H. Buschang
Keyword(s):  
Class Ii ◽  
Open Bite ◽  
Control Group ◽  
State University ◽  
Plane Angle ◽  
Anterior Open Bite ◽  
Skeletal Changes ◽  
Mandibular Plane ◽  
School Of Dentistry ◽  
Experimental Group

INTRODUCTION: Due to the lack of studies that distinguish between dentoalveolar and basal changes caused by the Thurow appliance, this clinical study, carried out by the School of Dentistry - State University of São Paulo/Araraquara, aimed at assessing the dental and skeletal changes induced by modified Thurow appliance. METHODS: The sample included an experimental group comprising 13 subjects aged between 7 and 10 years old, with Class II malocclusion and anterior open bite, and a control group comprising 22 subjects similar in age, sex and mandibular plane angle. Maxillary/mandibular, horizontal/vertical, dental/skeletal movements (ANS, PNS, U1, U6, Co, Go, Pog, L1, L6) were assessed, based on 14 landmarks, 8 angles (S-N-ANS, SNA, PPA, S-N-Pog, SNB, MPA, PP/MPA, ANB) and 3 linear measures (N-Me, ANS-Me, S-Go). RESULTS: Treatment caused significantly greater angle decrease between the palatal and the mandibular plane of the experimental group, primarily due to an increase in the palatal plane angle. ANB, SNA and S-N-ANS angles significantly decreased more in patients from the experimental group. PNS was superiorly remodeled. Lower face height (ANS-Me) decreased in the experimental group and increased in the control group. CONCLUSIONS: The modified Thurow appliance controlled vertical and horizontal displacements of the maxilla, rotated the maxilla and improved open bite malocclusion, decreasing lower facial height.

scholarly journals Dentoskeletal effects produced by removable palatal crib, bonded spurs, and chincup therapy in growing children with anterior open bite

2016 ◽  
Vol 86 (6) ◽  
pp. 969-975 ◽  
Author(s):  
Natalia Martins Insabralde ◽  
Renato Rodrigues de Almeida ◽  
José Fernando Castanha Henriques ◽  
Thais Maria Freire Fernandes ◽  
Carlos Flores-Mir ◽  
...  
Keyword(s):  
Analysis Of Variance ◽  
Open Bite ◽  
Treatment Modalities ◽  
Control Group ◽  
Anterior Open Bite ◽  
Lateral Cephalograms ◽  
Treatment Changes ◽  
Cephalometric Study ◽  
Post Hoc ◽  
Vertical Development

ABSTRACT Objective: To evaluate the dentoskeletal effects of different anterior open bite treatment modalities in children. Materials and Methods: This cephalometric study assessed changes resulting from different treatment approaches on 77 growing children with anterior open bite. A control group (n = 30) was used for comparison. Lateral cephalograms were available before treatment and after 12 months. The sample was divided into four groups: removable palatal crib associated with a chincup (G1), bonded spurs associated with a chincup (G2), chincup (G3), and nontreated control (G4). Statistical comparisons among the four groups were performed on T1 and the treatment changes using analysis of variance with Tukey's post hoc tests. Results: No statistically significant changes in skeletal variables were found among the groups, except for lower anterior face height (LAFH) increase in G1. Overall, effects in all of the treated groups were exclusively dentoalveolar. A larger overbite (OB) increase was observed in G1 and G2 when compared with G3 and G4. The maxillary incisors in G1 showed increased palatal tipping, retrusion, and more vertical dentoalveolar development as well as increased lingual tipping among mandibular incisors. There was less vertical development of maxillary and mandibular molars in G3. Conclusions: A removable palatal crib provided an improvement in OB (97.5%), followed by the bonded spurs (84.5%). Conversely, the chincup-only group did not have positive OB effects.

scholarly journals Skeletal morphologic features of Anterior Open Bite Malocclusionamongst black patients visiting the Medunsa oral health centre

2020 ◽  
Vol 75 (8) ◽  
pp. 425-431
Author(s):  
Ntokozo P Sithole ◽  
Mohamed I Khan ◽  
Mosimane PS Sethusa
Keyword(s):  
Black People ◽  
Pearson Correlation ◽  
Health Centre ◽  
Open Bite ◽  
Wilcoxon Test ◽  
Class I ◽  
Control Group ◽  
Class Iii ◽  
Anterior Open Bite ◽  
Anterior Teeth

INTRODUCTION: Anterior open bite (AOB) malocclusion presents as lack of vertical overlap of anterior teeth. It is viewed to be unaesthetic and may affect speech and mastication It develops due to the interaction of hereditary and environmental etiological factors and these usually affect the vertical growth of the face. This study describes the vertical changes of South African black people presenting with AOB. AIMS AND OBJECTIVES: The aim was to determine skeletal morphological features of patients with AOB malocclusion. DESIGN: The design was a retrospective, cross-sectional study. MATERIALS: Archived pre-treatment lateral cephalographs of 181 patients who consulted between 2007 and 2014 were divided into four groups: control group of 62 patients with skeletal Class I pattern without AOB; test groups of patients with AOB (119) divided into 35 Class I, 43 Class II, and 41 Class III malocclusions. Records of each group were divided according to gender. Descriptive statistics, the Pearson correlation coefficient, t-test and. Wilcoxon test were employed to analyze the data, and p values of <0.05 were considered statistically significant. RESULTS AND CONCLUSIONS: Patients with AOB had a larger vertical facial pattern in all classes of malocclusion. Males presented with larger Sn-GoGn angles than females. The PFH/AFH ratio was lower across all classes of malocclusion compared to the control group.

scholarly journals Influence of non-nutritive sucking habits on anterior open bite

2020 ◽  
Vol 19 ◽  
pp. e207468
Author(s):  
Ana de Lourdes Sá de Lira ◽  
Alice Rodrigues Santos
Keyword(s):  
Bottle Feeding ◽  
Open Bite ◽  
Control Group ◽  
Deciduous Dentition ◽  
Anterior Open Bite ◽  
Cross Sectional ◽  
Nonnutritive Sucking ◽  
Anterior Teeth ◽  
Nutritive Sucking ◽  
Significant Difference

Aim: To evaluate the clinical behavior of sucking habits in children between 2 to 6 years old in a private (A1) and a public school (A2) in the state of Piauí. Methods: It was cross-sectional and quantitative study in 340 participants, 169 in A1 and 171 in A2. The researchers asked the children evaluated to keep their teeth occluded while analyzing whether there was no contact between the anterior teeth and no lip sealing, characterizing the anterior openbite for G1 or if there was contact between the incisors, with lip sealing, characterizing the control group (G2). Results: There was no statistically significant difference between groups regarding bottle feeding at main meals (χ2 = 3.03; p = 0.08). However, regarding the use of a pacifier, there was a statistically significant association (χ2 = 17.99; p <0.01) between pacifier use and the presence of anterior openbite. Such association was also observed between digital sucking habit and malocclusion (χ2 = 8.99; p = 0.01). Only the parents of the children with anterior openbite noticed the disharmony in the occlusion. It can be deduced that there was an awareness of parents /guardians about the disharmony generated by non-nutritive sucking habits. Conclusion: Nonnutritive sucking habits influenced the appearance of the anterior open bite in children with deciduous dentition. Nonnutritive sucking habits, such as digital sucking and pacifiers, are significantly associated with the presence of anterior open bite. Breastfeeding is important in preventing this malocclusion.

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