scholarly journals Vertical skeletal changes after extraction and non-extraction treatment in matched class I patients identified by a discriminant analysis: cephalometric appraisal and Procrustes superimposition

2017 ◽  
Vol 18 (1) ◽  
Author(s):  
Philipp Beit ◽  
Dimitrios Konstantonis ◽  
Alexandros Papagiannis ◽  
Theodore Eliades
Keyword(s):  
Discriminant Analysis ◽  
Class I ◽  
Skeletal Changes ◽  
Extraction Treatment ◽  
Procrustes Superimposition

scholarly journals Long-term skeletal effects of high-pull headgear followed by fixed appliances for the treatment of Class II malocclusions

2018 ◽  
Vol 88 (5) ◽  
pp. 530-537
Author(s):  
E. Erin Bilbo ◽  
Steven D. Marshall ◽  
Karin A. Southard ◽  
Verrasathpurush Allareddy ◽  
Nathan Holton ◽  
...  
Keyword(s):  
Class Ii ◽  
Class I ◽  
Control Group ◽  
Orthodontic Appliances ◽  
Skeletal Changes ◽  
Fixed Orthodontic Appliances ◽  
Horizontal Growth ◽  
Skeletal Effects ◽  
Fixed Appliances

ABSTRACT Objectives: The long-term skeletal effects of Class II treatment in growing individuals using high-pull facebow headgear and fixed edgewise appliances have not been reported. The purpose of this study was to evaluate the long-term skeletal effects of treatment using high-pull headgear followed by fixed orthodontic appliances compared to an untreated control group. Materials and Methods: Changes in anteroposterior and vertical cephalometric measurements of 42 Class II subjects (n = 21, mean age = 10.7 years) before treatment, after headgear correction to Class I molar relationship, after treatment with fixed appliances, and after long-term retention (mean 4.1 years), were compared to similar changes in a matched control group (n = 21, mean age = 10.9 years) by multivariable linear regression models. Results: Compared to control, the study group displayed significant long-term horizontal restriction of A-point (SNA = −1.925°, P < .0001; FH-NA = −3.042°, P < .0001; linear measurement A-point to Vertical Reference = −3.859 mm, P < .0001) and reduction of the ANB angle (−1.767°, P < .0001), with no effect on mandibular horizontal growth or maxillary and mandibular vertical skeletal changes. A-point horizontal restriction and forward mandibular horizontal growth accompanied the study group correction to Class I molar, and these changes were stable long term. Conclusions: One phase treatment for Class II malocclusion with high-pull headgear followed by fixed orthodontic appliances resulted in correction to Class I molar through restriction of horizontal maxillary growth with continued horizontal mandibular growth and vertical skeletal changes unaffected. The anteroposterior molar correction and skeletal effects of this treatment were stable long term.

scholarly journals Mandibular Incisor Extraction Treatment of a Class I Malocclusion with Bolton Discrepancy: A Case Report

2007 ◽  
Vol 01 (01) ◽  
pp. 054-059 ◽  
Author(s):  
Mehmet Bayram ◽  
Mete Özer
Keyword(s):  
Case Report ◽  
Class I ◽  
Tooth Size ◽  
Posterior Teeth ◽  
Mandibular Incisor ◽  
Mandibular Tooth ◽  
Anterior Teeth ◽  
Dental Crowding ◽  
Enamel Reduction ◽  
Extraction Treatment

ABSTRACTMany approaches for crowded mandibular anterior teeth are currently employed: distal movement of posterior teeth, lateral movement of canines, labial movement of incisors, interproximal enamel reduction, removal of premolars, removal of one or two incisors, and various combinations of the above. Selecting the best treatment is often difficult, and all guidelines do not apply to every case. Treatment by extraction of one single mandibular incisor is not popular in the orthodontic profession despite the apparent advantages of the extraction in the region of crowding. A case report is presented one mandibular incisor extraction treatment of a 16 year-old female with a Class I malocclusion that shows a significant mandibular arch length deficiency and mandibular tooth-size excess. In this case, the degree of mandibular anterior dental crowding, existing mandibular tooth-size excess, and the dental midline discrepancy were indicated the extraction of one mandibular incisor. (Eur J Dent 2007;1:54-59)

scholarly journals Evaluation of aesthetic anteroposterior position of maxillary incisors in patients with extraction treatment using facial reference lines

2019 ◽  
Vol 47 (7) ◽  
pp. 2951-2960 ◽  
Author(s):  
Danqing He ◽  
Yan Gu ◽  
Yannan Sun
Keyword(s):  
Soft Tissue ◽  
Relative Position ◽  
Vertical Line ◽  
Class I ◽  
Maxillary Incisor ◽  
Anatomical Landmarks ◽  
Regression Analyses ◽  
The Mean ◽  
Maxillary Incisors ◽  
Extraction Treatment

Objective To examine whether facial reference lines could be used to evaluate the anteroposterior position of the maxillary incisors in patients that had undergone extraction treatment. Methods The study enrolled Angle Class I patients who had favourable facial profiles after extraction treatment. Superimposition of post-treatment lateral photographs and cephalograms were constructed and anatomical landmarks on the forehead were identified. Reference lines of the forehead’s anterior limit line (FALL) and the vertical line through the soft-tissue glabella (G line) were constructed. The distance between the maxillary incisors and the FALL and G line were measured. Regression analyses were performed between the maxillary incisor position and forehead inclination. Results Forty-one patients (31 females and 10 males) were included in the study. The mean ± SD distances of the facial-axis point of the maxillary incisors (FA)–FALL and FA–G line were 1.8 ± 1.9 mm and –2.4 ± 1.8 mm, respectively. The distance of the maxillary incisors to FALL and the relative position of the maxillary incisors were both significantly correlated with forehead inclination. Conclusions The mean position of the maxillary incisors in patients with extraction was approximately in the middle of the G line and the FALL. Correct maxillary incisor position was correlated with forehead inclination.

scholarly journals Arch Widths after Extraction and Nonextraction Treatment in Class I Patients

2013 ◽  
Vol 14 (2) ◽  
pp. 312-315 ◽  
Author(s):  
Vikranth Shetty ◽  
Sangeeta A Golwalkar
Keyword(s):  
Retrospective Study ◽  
Clinical Significance ◽  
Post Treatment ◽  
Class I ◽  
Posterior Arch ◽  
Arch Width ◽  
End Of Treatment ◽  
Smile Esthetics ◽  
Digital Caliper ◽  
Extraction Treatment

ABSTRACT Aim To compare pretreatment and post-treatment dental arches in relation to intercanine and intermolar width changes in extraction and nonextraction treatment in class I patients. Materials and methods In this retrospective study pretreatment and post-treatment dental casts of 60 patients (30 extractions of first premolars and 30 nonextractions) were selected. Anterior and posterior arch widths in the canine and molar regions from the most labial aspect of buccal surfaces, the canines and the molars were measured with the help of digital caliper on the study models and compared statistically to determine whether the dental arches were narrower after extraction treatment. Results At the start of the treatment there were no statistically significant differences in maxillary and mandibular intercanine widths in both groups. At the end of treatment in both the groups anterior and posterior arch width changes were not significant except for the intercanine dimension which was 0.82 mm larger (p < 0.05) in the extraction group. Conclusion The extraction treatment does not result in narrower dental arches than nonextraction treatment in intercanine and intermolar region. Clinical significance It is documented that the arch widths determine smile esthetics and treatment stability. According to the findings of the present study the arch widths in extraction treatments are not narrower than nonextraction so there will not be any compromising effects on esthetics and treatment stability. How to cite this article Golwalkar SA, Shetty V. Arch Widths after Extraction and Nonextraction Treatment in Class I Patients. J Contemp Dent Pract 2013;14(2):312-315.

scholarly journals Effects of Invisalign (G5) with virtual bite ramps for skeletal deep overbite malocclusion correction in adults

2021 ◽  
Author(s):  
Douglas Henick ◽  
Willy Dayan ◽  
Robert Dunford ◽  
Stephen Warunek ◽  
Thikriat Al-Jewair
Keyword(s):  
Comprehensive Treatment ◽  
Deep Bite ◽  
Fixed Appliance ◽  
Skeletal Changes ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Sex Type ◽  
The Mean ◽  
Overbite Depth Indicator ◽  
Extraction Treatment

ABSTRACT Objectives To investigate the skeletal and dentoalveolar effects of Invisalign's G5 protocol with virtual bite ramps in the treatment of adults with skeletal deep bites. Materials and Methods This retrospective study was conducted on consecutively treated adults presenting with skeletal deep bites as defined by the Overbite Depth Indicator (ODI). Subjects were divided into 2 groups: Invisalign group (n = 24) treated with the Invisalign G5 protocol and a full fixed appliance (FFA) group (n = 24) treated with edgewise FFAs and matched to the Invisalign group by ODI, sex, type of malocclusion, and non-extraction treatment. Pretreatment (T1) and post–comprehensive treatment (T2) lateral cephalograms were obtained and analyzed. Results Both the Invisalign and FFA groups showed significant changes from T1 to T2 in ODI and other skeletal and dentoalveolar measurements. The mean change in ODI was −1.5° (P &lt; .001) for the Invisalign group and −2.0° (P &lt; .001) for the FFA group. The mean decrease in overbite was 1.3 mm (P &lt; .001) and 2.0 mm (P &lt; .001) for the Invisalign and FFA groups, respectively. The mean increase in mandibular plane angle (Sn-GoGn) was 0.65° (P = .003) for the Invisalign group and 1.15° (P &lt; .001) for the FFA group. When the groups were compared with each other, both ODI (P = .03) and overbite (P = .003) were significantly different in addition to other measurements. Conclusions Although FFA treatment had more apparent skeletal changes for deep bite adult patients when compared with Invisalign, both systems were effective in opening deep bites at dentoalveolar and skeletal levels.

scholarly journals A comparison of second premolar extraction and mini-implant total arch distalization with interproximal stripping

2012 ◽  
Vol 83 (4) ◽  
pp. 680-685 ◽  
Author(s):  
Min-Ho Jung
Keyword(s):  
Single Phase ◽  
Class I ◽  
Treatment Result ◽  
Lower Incisor ◽  
Premolar Extraction ◽  
Mini Implants ◽  
Lateral Cephalograms ◽  
Significant Difference ◽  
Incisor Retraction ◽  
Extraction Treatment

ABSTRACT Objective: The effect of total arch distalization using orthodontic mini-implants (OMIs) combined with interproximal stripping (IPS) and second premolar extraction was investigated in Class I malocclusion patients. Materials and Methods: A total of 66 consecutively treated Class I malocclusion (Class I molar relationship; 0 mm &lt; overbite and overjet &lt; 4.5 mm) patients ranging in age from 17 to 44 years who received single-phase treatment were included in this study. Pre- and posttreatment lateral cephalograms and dental casts were measured and compared statistically. Results: In the distalization with IPS group, 3.6 mm and 3.8 mm of crowding in the upper and lower arches, respectively, were resolved, and 3.8 mm and 3.2 mm of upper and lower incisor retraction, respectively, were achieved simultaneously by the treatment. As a result of the second premolar extraction treatment, 3.9 mm and 3.6 mm of crowding in the upper and lower arches, respectively, were resolved, and 3.3 mm and 3.2 mm of incisor retraction, respectively, were achieved during treatment. There was no statistically significant difference in the amount of crowding and incisor retraction between the two groups. Conclusions: Total arch distalization using an OMI with IPS did not yield a significantly different treatment result compared to second premolar extraction treatment.

scholarly journals Perawatan Maloklusi Pseudo Kelas III dengan Alat Ortodontik Cekat Teknik Begg

2016 ◽  
Vol 19 (1) ◽  
pp. 163
Author(s):  
Robertus Meidiyanto ◽  
Wayan Ardhana
Keyword(s):  
Class I ◽  
Intermediate Form ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Fixed Appliance ◽  
Skeletal Class ◽  
Gonial Angle ◽  
Skeletal Changes ◽  
Sample Measurement ◽  
Relationship Of

Latar Belakang: Maloklusi Pseudo kelas III ditandai dengan hubungan yang tidak harmonis antara relasi anteroposterior rahang dan posisi mandibula terhadap maksila. Ketidakharmonisan tersebut dapat disebabkan karena mandibula yang normal dengan maksila retrusif. Maloklusi pseudo kelas III mempunyai perhitungan yang menunjukkan bentuk antara klas I dan skeletal klas III. Perbedaanya hanya pada sudut gonial dimana pada skeletal klas III sudutnya lebih tumpul, sedangkan pada sampel pseudo klas III, sudut gonial lebih mirip dengan klas I. Perawatan ortodontik dengan alat cekat teknik Begg dapat juga untuk merawat maloklusi Angle kelas III, termasuk maloklusi skeletal yang menyertainya. Tujuan: memaparkan perubahan dental dan skeletal setelah perawatan dengan alat cekat teknik Begg. Kasus: perempuan 20 tahun mengeluhkan gigi-gigi rahang atas ada yang tumbuh di belakang dan rahang bawah nyakil sehingga menganggu penampilan dan mengurangi rasa percaya diri. Diagnosis: Maloklusi Angle Klas III subdivisi serta hubungan skeletal klas III dengan maksila retrusif dan mandibula protusif disertai Crossbite: 12, 11, 21, 22 terhadap 34, 32,31, 41, 42, 43. Perawatan: menggunakan alat cekat teknik Begg tanpa pencabutan. Kesimpulan: Hasil menunjukkan crowded terkoreksi, overjet dan overbite terkoreksi, relasi molar menjadi klas I. Background: Pseudo class III malocclusion characterized by disharmony between anteroposterior relationship of jaw and mandibulae position toward maxilla. This disharmony cause by normally shaped mandibles and underveloped maxillae. Pseudo clas III malocclusion is an intermediate form between class I and skeletal clas III malocclusion. The only exception was the gonial angle, which was generally more obtuse in the skeletal class III sample. Measurement of gonial angle in the pseudo class III sample was found to be rather similar to class I sample. Fixed Begg orthodontic appliance can be used to treat Angle’s class III malocclusion accompany with skeletal problem. Purpose: to describe dental and skeletal changes after begg fixed orthodontic. Case: 20 year old woman complained of crowded maxilla front teeth and mandible protrusion. Diagnosis: malocclusion Angle class III subdivision, skeletal class III with maxilla retruded and mandibular pronation along with anterior crossbite: 12, 11, 21, 22, to 34, 32, 31, 41, 42, 43. Treatment: using the Begg fixed appliance techniques without extraction. Conclusion: The result showed that crowded, overjet and overbite corrected, and molar relation become class I.

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