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 Cephalometric evaluation of adult anterior open bite non-extraction treatment with Invisalign

2017 ◽  
Vol 22 (5) ◽  
pp. 30-38 ◽  
Author(s):  
Shuka Moshiri ◽  
Eustáquio A. Araújo ◽  
Julie F. McCray ◽  
Guilherme Thiesen ◽  
Ki Beom Kim
Keyword(s):  
Open Bite ◽  
Therapeutic Modality ◽  
Occlusal Plane ◽  
Anterior Open Bite ◽  
Lower Incisor ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Treatment Changes ◽  
Extraction Treatment ◽  
Lower Molar

ABSTRACT Objective: The purpose of this study was to evaluate, by means of cephalometric appraisal, the vertical effects of non-extraction treatment of adult anterior open bite with clear aligners (Invisalign system, Align Technology, Santa Clara, CA, USA). Methods: Lateral cephalograms of 30 adult patients with anterior open bite treated using Invisalign (22 females, 8 males; mean age at start of treatment: 28 years and 10 months; mean anterior open bite at start of treatment: 1.8 mm) were analyzed. Pre- and post-treatment cephalograms were traced to compare the following vertical measurements: SN to maxillary occlusal plane (SN-MxOP), SN to mandibular occlusal plane (SN-MnOP), mandibular plane to mandibular occlusal plane (MP-MnOP), SN to mandibular plane (SN-MP), SN to palatal plane (SN-PP), SN to gonion-gnathion plane (SN-GoGn), upper 1 tip to palatal plane (U1-PP), lower 1 tip to mandibular plane (L1-MP), mesiobuccal cusp of upper 6 to palatal plane (U6-PP), mesiobuccal cusp of lower 6 to mandibular plane (L6-MP), lower anterior facial height (LAFH), and overbite (OB). Paired t-tests and descriptive statistics were utilized to analyze the data and assess any significant changes resulting from treatment. Results: Statistically significant differences were found in overall treatment changes for SN-MxOP, SN-MnOP, MP-MnOP, SN-MP, SN-GoGn, L1-MP, L6-MP, LAFH, and OB. Conclusions: The Invisalign system is a viable therapeutic modality for non-extraction treatment of adult anterior mild open bites. Bite closure was mainly achieved by a combination of counterclockwise rotation of the mandibular plane, lower molar intrusion and lower incisor extrusion.

scholarly journals Microscrew Anchorage in Skeletal Anterior Open-bite Treatment

2007 ◽  
Vol 77 (1) ◽  
pp. 47-56 ◽  
Author(s):  
Chunlei Xun ◽  
Xianglong Zeng ◽  
Xing Wang
Keyword(s):  
Alveolar Bone ◽  
Open Bite ◽  
Anterior Open Bite ◽  
Posterior Teeth ◽  
Miniscrew Implants ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Patient Cooperation ◽  
Skeletal Pattern ◽  
Skeletal Open Bite

Abstract Objective: To evaluate the effectiveness of miniscrew anchorage for intrusion of the posterior dentoalveolar region to correct skeletal open bite. Materials and Methods: The study was comprised of 12 patients (aged 14.3 to 27.2 years; mean 18.7 years) with anterior open bites. All the patients presented a Class II skeletal pattern and excessive posterior growth. Self-drilling miniscrew implants were inserted into the posterior midpalatal area and the buccal alveolar bone between the lower molars. A transpalatal and a lingual arch were used to maintain the molars on each side in order to avoid overrotation during intrusion. A force of 150 g was applied to the microscrews on each side to intrude the posterior teeth. Lateral cephalograms of all 12 patients were taken preintrusion and immediately after completion of the intrusion. The cephalometric films were measured and compared. Results: The results showed that the anterior open bites in 12 patients were all corrected in a mean of 6.8 months. Overbite increased by a mean of 4.2 mm (P < .001), from −2.2 mm in preintrusion to 2.0 mm in postintrusion. The maxillary and mandibular first molars were intruded for an average of 1.8 mm (P < .001) and 1.2 mm (P < .001), respectively. The mandibular plane angle was reduced by 2.3° (P < .001), which led to a counterclockwise rotation of the mandible with a significant decrease in the anterior facial heights (mean of 1.8 mm; P < .001). Conclusion: Miniscrew anchorage has the advantages of being a simpler procedure, being minimally invasive, and requiring minimal patient cooperation.

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 Nonsurgical treatment of skeletal anterior open bite in adult patients: Posterior build-ups

2016 ◽  
Vol 87 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Arturo Vela-Hernández ◽  
Rocio López-García ◽  
Verónica García-Sanz ◽  
Vanessa Paredes-Gallardo ◽  
Felicidad Lasagabaster-Latorre
Keyword(s):  
Open Bite ◽  
Anterior Open Bite ◽  
Retention Period ◽  
Term Stability ◽  
Long Term Stability ◽  
Skeletal Changes ◽  
Molar Intrusion ◽  
Mandibular Plane ◽  
Lateral Cephalograms

ABSTRACT Objective: To (1) evaluate the efficacy of build-ups in the correction of anterior open bite in adults, (2) evaluate their efficacy in producing molar intrusion, (3) analyze skeletal and dental changes, and (4) assess the long-term stability. Materials and Methods: The sample consisted of 93 lateral cephalograms from 31 patients with skeletal and dental anterior open bite. The patients had received orthodontic treatment consisting of bonded resin blocks on the maxillary molars combined with Tip-Edge Plus bracket appliances. Cephalometric measurements were performed on radiographs taken before treatment (T1), after treatment (T2), and after a retention period (T3), which were analyzed and compared. Results: Significant dental and skeletal changes were observed after treatment. Molar intrusion averaging 1 mm; 1.44 and 1.57 mm extrusion of mandibular and maxillary incisors, respectively; and a mean of 3.98 mm overbite increase were observed. The mandibular plane angle showed a mean closure of 1.19°, and there was a mean decrease in anterior facial height of 0.7 mm. A mild relapse tendency was observed, but long-term stability was acceptable. Conclusions: Build-ups are an effective treatment alternative for anterior open bite in adults. Outcomes remain significantly stable during the retention period.

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 Evaluation of the stability of open bite treatment using a removable appliance with palatal crib combined with high-pull chincup

2012 ◽  
Vol 17 (6) ◽  
pp. 52-60 ◽  
Author(s):  
Fernando Pedrin Carvalho Ferreira ◽  
Renato Rodrigues de Almeida ◽  
Fernando César Torres ◽  
Renata Rodrigues de Almeida-Pedrin ◽  
Marcio Rodrigues de Almeida ◽  
...  
Keyword(s):  
Statistical Tests ◽  
Open Bite ◽  
Control Group ◽  
Anterior Open Bite ◽  
Skeletal Changes ◽  
Lateral Cephalograms ◽  
The Stability ◽  
Removable Appliance ◽  
Experimental Group

OBJECTIVE: The aim of this prospective study was to cephalometrically analyze the stability of dentoalveolar and skeletal changes produced by a removable appliance with palatal crib associated to high-pull chincup in individuals with anterior open bite treated for 12 months, and compare them to individuals with similar malocclusion and age, not submitted to orthodontic treatment, also followed for the same period. METHODS: Nineteen children with a mean age of 9.78 years old treated for 12 months with a removable appliance with palatal crib associated with chincup therapy were evaluated after 15 months (post-treatment period) and compared with a control group of 19 subjects with mean age of 9.10 years with the same malocclusion that was followed-up for the same period. Seventy-six lateral cephalograms were evaluated at T1 (after correction) and T2 (follow-up) and cephalometric variables were analyzed by statistical tests. RESULTS: The results did not show significant skeletal, soft tissue or maxillary dentoalveolar changes. Overall, treatment effects on the experimental group were maintained at T2 evaluation with an increase of 0.56 mm in overbite. Overjet and maxillary incisors/molars position (vertical and sagittal) remained essentially unchanged during the study period. Only mandibular incisors showed significant changes (labial inclination and protrusion) compared to control group. CONCLUSIONS: Thus, it can be concluded that the early open bite treatment with a removable appliance and palatal crib associated with high-pull chincup therapy provided stability of 95%.

scholarly journals Changes in mandibular shape after early treatment in subjects with open bite: a geometric morphometric analysis

2020 ◽  
Vol 42 (6) ◽  
pp. 643-649
Author(s):  
Roberta Lione ◽  
Dimitri Fusaroli ◽  
Manuela Mucedero ◽  
Valeria Paoloni ◽  
Chiara Pavoni ◽  
...  
Keyword(s):  
Open Bite ◽  
Procrustes Analysis ◽  
Control Group ◽  
Maxillary Expansion ◽  
Mandibular Ramus ◽  
Anterior Open Bite ◽  
Bite Block ◽  
Geometric Morphometric ◽  
Counterclockwise Rotation ◽  
Lateral Cephalograms

Summary Objectives To evaluate the mandibular modifications in anterior open bite (OB) growing subjects treated with Rapid Maxillary Expansion and bite block (RME/BB) or Quad Helix with crib (QH/C) when compared with a Control Group (CG) by using Geometric Morphometric Method (GMM) and conventional cephalometric. Materials The OB group comprised 34 subjects (26 girls, 8 boys) with dentoskeletal OB and a mean age of 8.0 ± 1.0 years. OB group was divided in two subgroups: RME/BB group comprised 17 subjects (13 girls, 4 boys), while QH/C group included 17 subjects (13 girls, 4 boys). The two subgroups were compared with a CG of 17 subjects (13 girls, 4 boys) matched for sex, age, vertical pattern, and observation periods. Two consecutives lateral cephalograms were available: the first one was taken before treatment (T1), and the second one was acquired at a follow-up observation at least 4 years after the completion of treatment (T2). Landmarks and semilandmarks were digitized on lateral cephalograms and GMM was applied. Procrustes analysis and principal component analysis were performed. Analysis of variance (ANOVA) with Tukey post hoc tests was used to compare the T2–T1 cephalometric changes between the RME/BB, QH/C, and CG. Results In the long term, RME/BB showed a significantly greater decrease of the Condylar axis to mandibular plane angle when compared to CG and QH/C. GMM showed an increased in height of the mandibular ramus in RME/BB group with tendency to counterclockwise rotation of the mandible when compared with QH/C and CG groups. Conclusions RME/BB subjects showed significant changes in the shape of the mandibular ramus with a counterclockwise rotation tendency when compared with QH/C and CG subjects.

Aversive Taste Treatment of Finger and Thumb Sucking

PEDIATRICS ◽  
1986 ◽  
Vol 78 (1) ◽  
pp. 174-176
Author(s):  
PATRICK C. FRIMAN ◽  
VINCENT J. BARONE ◽  
EDWARD R. CHRISTOPHERSEN
Keyword(s):  
Early Childhood ◽  
Behavior Disorders ◽  
Self Esteem ◽  
Open Bite ◽  
Class Ii Malocclusion ◽  
Anterior Open Bite ◽  
Child Behavior Problem ◽  
Aversive Taste ◽  
Thumb Sucking ◽  
Infancy And Early Childhood

Thumb sucking is common and adaptive in infancy and early childhood. But when sucking occurs beyond 4 years of age, a common result can be an anterior, open bite that requires expensive orthodontic correction.1 Prolonged sucking may also be a factor in class II malocclusion, narrowing of the dental arches, mucosal trauma, and digital malformation.1-4 In addition to the physical sequelae of sucking, the habit, because it is not socially approved, can generate persistent negative feedback which can adversely affect a child's self-esteem.5 Thumb sucking is a frequently reported child behavior problem that, in some children, can be associated with broader behavior disorders that require treatment.

scholarly journals Anterior open bite: cephalometric evaluation of the dental pattern

2006 ◽  
Vol 17 (1) ◽  
pp. 68-70 ◽  
Author(s):  
Adriana Sasso Stuani ◽  
Andréa Sasso Stuani ◽  
Maria Bernadete Sasso Stuani ◽  
Maria da Conceição Pereira Saraiva ◽  
Mírian Aiko Nakane Matsumoto
Keyword(s):  
Open Bite ◽  
Occlusal Plane ◽  
Anterior Open Bite ◽  
Panoramic Radiographs ◽  
Lateral Cephalograms ◽  
Significant Difference ◽  
Dental Origin ◽  
Dental Pattern ◽  
Mandibular Incisors

The purpose of this study was to compare the dental pattern of patients with anterior open bite malocclusion to that of individuals with normal overbite by utilization of lateral cephalograms, panoramic radiographs and study casts. The findings showed that there was no significant difference in the inclination of the occlusal plane (SN.PlO) and position of the maxillary and mandibular incisors (1-NA, 1-NB) between both groups of individuals; but the angles of inclination of the maxillary and mandibular incisors (1.1, 1.NA and 1.NB) differed statistically between patients with anterior open bite of the individuals that presented normal overbite, which suggests that the anterior open bite may be of dental origin.

scholarly journals Aspirin-Persantin Prophylaxis in Elective total hip Replacement

1977 ◽  
Author(s):  
A.J. Silvergleid ◽  
R. Bernstein ◽  
D.S. Burton ◽  
J.B. Tanner ◽  
J.F. Silverman ◽  
...  
Keyword(s):  
Total Hip Replacement ◽  
Hip Replacement ◽  
Treated Group ◽  
Control Group ◽  
Double Blind ◽  
Total Hip ◽  
Blind Area ◽  
Effective Prophylaxis ◽  
Clinically Significant ◽  
To Receive

A prospective, double-blind clinical study was performed to evaluate the combination of dipyridamole(Persantin)225 mg/day and acetyl salicyclic acid (ASA) 1 g/day prophylaxis of post-operative venous thromboembolism in elective total hip replacement. Patients were stratified according to age, and randomly assigned to receive drug or placebo. All patients were followed with 125I-labelledfibrinogen scanning for one week post-operatively, or until fully mobile. Venography was performed in 67/129 patients; in 27 patients the venogram was obtained to confirm a positive fibrinogen scan, in 40 patients an elective venogram was obtained on the 7th post-operative day to evaluate the operated thigh (a blind area for scanning). Thrombosis (by scan or venogram) was found in 16/66(24%) in the control group, and in 21/63(33%) in the treated group. Overall incidence was 37/129 (29%). Correlation of scan with venography was 90%. There were no clinically significant pulmonary emboli in either group. We conclude that the combination of ASA and dipridamole as given in this study is not effective prophylaxis in elective total hip replacement.

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