Análise da posição rotacional do primeiro molar permanente superior na má oclusão de Classe II Divisão 1

Junqueira, Marisa Helena Zingaretti; Valle-Corotti, Karyna Martins do; Garib, Daniela Gamba; Vieira, Ricardo Brandão; Ferreira, Flávio Vellini

doi:10.1590/s2176-94512011000100014

Cited by 4 publications

(7 citation statements)

References 9 publications

(20 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mean angle of Friel was 58.25°, which is similar to the values reported by Giuntini et al [19] and Junqueira et al [16] (55.8° and 57.45°, resp.). Kanomi et al [20] found a higher value for this indicator (63.5°), probably because their population comprised several malocclusion types and not Class II division 1 malocclusion alone.…”

Section: Discussionsupporting

confidence: 90%

“…It is noteworthy that the mean values of indicators 1 and 2 are very similar to those obtained in other studies [5, 16] of Class II malocclusion using a similar methodology. The small differences observed may result from other factors in addition to the malocclusion type that also causes rotation of the first molars, such as the upper arch morphology, changes in the shape and size of the maxillary first molars, canines, and premolars, malpositioning of the canines and premolars, the presence or absence of interproximal caries, and early loss of the deciduous molars.…”

Section: Discussionsupporting

confidence: 87%

“…When the individual indicators were evaluated, the mean angle of Henry was 14.51°, which is very similar to the 14.98° found by Junqueira et al [16] and close to the 15.3° found by Giuntini et al [19], but less than the 17.38° found by Henry [5]. The mean angle of Friel was 58.25°, which is similar to the values reported by Giuntini et al [19] and Junqueira et al [16] (55.8° and 57.45°, resp.).…”

Section: Discussionsupporting

confidence: 85%

“…The more distal this line, the greater the mesiopalatal rotation, while a more mesial line indicates greater distopalatal rotation. The mean value in this study indicates mesiopalatal rotation of the molar and was higher than the 11.38 mm value reported by Junqueira et al [16] in Class II malocclusions. For this indicator, no correlation was observed between the severity of Class II malocclusion and the magnitude of molar rotation; however, values varied from 2.3 to 27.63 mm, indicating a high standard deviation in this measure.…”

Section: Discussioncontrasting

confidence: 72%

“…Although many studies have examined the prevalence of rotation in molar malocclusion Class II patients [5, 6, 13–16], few studies have examined the correlation between the severity of the anteroposterior molar relationship and the magnitude of rotation, which indicated the need for the present study. In this context, this study aimed to evaluate the correlation between the magnitude of rotation of the maxillary first molars and the severity of Class II malocclusion.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Correlation between the Rotation of the First Molars and theSeverity of Class II Division 1 Malocclusion

Lima

Pinzan-Vercelino

Dias

et al. 2015

The Scientific World Journal

View full text Add to dashboard Cite

This study aimed to evaluate the potential correlation between the severity of Class II division 1 malocclusion and the magnitude of mesiopalatal rotation of the maxillary first molars. Scanned images of 104 cast models were grouped according to the severity of Class II malocclusion as follows: Group 1, 1/4 Class II malocclusion; Group 2, 1/2 Class II malocclusion; Group 3, 3/4 Class II malocclusion; and Group 4, complete Class II malocclusion. The rotation was measured using parameters described by Henry, Friel, and Ricketts, referred to as indicators 1, 2, and 3, respectively. The correlation was evaluated using the Spearman's correlation coefficient. The rotational indicators were compared using one-way analysis of variance. For all statistical analyses used p < 0.05, a positive correlation was observed between the severity of Class II malocclusion and the mesiopalatal rotation of the maxillary first molar. This correlation was statistically significant for indicator 1 between Groups 1 and 3 and for indicator 2 between Groups 1 and 4, which include cases of extreme malocclusion. In conclusion, there is a positive correlation between the severity of Class II division 1 malocclusion and the magnitude of mesiopalatal rotation in the maxillary first molars.

show abstract

Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 87%

Section: Discussionsupporting

confidence: 85%

Section: Discussioncontrasting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Correlation between the Rotation of the First Molars and theSeverity of Class II Division 1 Malocclusion

Lima

Pinzan-Vercelino

Dias

et al. 2015

The Scientific World Journal

View full text Add to dashboard Cite

show abstract

The importance of upper first permanent molars position for the orthognatic occlusion

Ivanova

Arnautska

Valcheva

et al. 2018

Scripta Scientifica Medicinae Dentalis

View full text Add to dashboard Cite

Development of the dental arches and occlusion in permanent dentition can be divided into several stages and has to be observed regularly. The first permanent molar eruption is related to the onset of significant changes in the developing occlusion. Although this tooth is seen as the "key to occlusion" its value as an anchorage is debatable. The aim of the article is to study the correct position of the upper first molars in the two planes of spacethe sagittal and transverse planes. In this article the position of the first upper molar is examined with the aid of diagnostic records, such as study cast, orthopantomogram (OPG), and lateral cephalometrics. A literature review includes Bulgarian and foreigner authors. Angle, who in 1899 referred to the maxillary first permanent molars as the "key to occlusion", was the first to mention their importance within the dentition. According to Angle, the line passing through the middle of the mesiobuccal cusp of the upper first molar coincides with the line passing through the buccal groove of the lower first molar. After Angle, other authors have discussed the position of upper molars from different point of view, such as their relation or position in the maxilla, anteroposterior axial inclination and rotation. As indicated by Lamons and Holmes molar rotations commonly exist in Class II malocclusions. The molars are usually rotated around an axis lingual to their central fossae. In an ideal occlusion the buccal surfaces of the upper first molars are usually parallel to each other On the OPG Kurol and Bjerklin measured the axial mesial inclination of upper first molar. The tipping of the molars is measured by the angle formed between the tangent line to the mesial surfaces of the root and crown and the line through the lower margins of the left and right orbits. According to Sassouni, the mesial contour of upper first molar should to lie on the 4th arc-the temporal arc. If the molar is anterior to this arc, a treatment with distalization could be initiated. The temporal arcnasion distance measured on the radius is equal to the distance from point ANS to the upper first molar. The position of the upper first molar varies with the position of the upper central incisors. The basic hypothesis is that if the upper first molar has a fixed position in the face, any increase in the total upper dental arch length will be transferred to the incisor area. Any change in the anteroposterior position of the upper first molar could influence the position of the mandibular-leading to Class II malocclusion. Ricketts pointed out that the average distance from the pterygoid vertical (PTV) to the distal surface of upper first molar is the sum of the age of the patient The Importance of Upper First Permanent Molars Position for the Orthognatic Occlusion

show abstract

Analysis of Maxillary First Molar Derotation with Invisalign Clear Aligners in Permanent Dentition

Lione

Paoloni

Razza

et al. 2022

Life

View full text Add to dashboard Cite

The objective of this study was to examine the distal rotation of mesial rotated maxillary first permanent molars in a sample of Class II dental malocclusion adult patients treated with Invisalign Clear Aligners (CA). Forty patients (20 males, 20 females, 22.4 ± 3.9 years) were included in the study sample (Department of Orthodontics of University of Rome “Tor Vergata”). Inclusion criteria were: Caucasian ancestry, complete permanent dentition with fully erupted upper second molars, Class II molar relationship, absence of tooth or craniofacial anomalies or caries and periodontal diseases. Pre-treatment (T1), post-treatment (T2) digital casts, and final ClinCheck simulation models (T2CC) were analysed. To measure the rotation of maxillary first molars, Henry’s angle (H°) was evaluated. Maxillary first molars with an H° > 11° were considered mesio-rotated (in total 59 teeth). The treatment CA protocol included disto-rotation without distalization movements. At T1, T2 and T2CC five measurements on the collected dental casts were analysed: Henry’s angle (H°); mesial buccal expansion (ME); distal buccal expansion (DE); mesial buccal sagittal (MS); and distal buccal sagittal (DS). A comparison between the results of T2–T1 and T2CC–T2 was performed using a paired t-test. The differences between T2–T1 highlighted a significant distal rotation of the maxillary first molars (−7.4°) and an expansion movement of 2.20 mm for ME and 1.50 mm for DE. In the post-treatment, the mesial buccal cusps shifted of 1.0 mm, while the distal buccal cusps showed a distal movement of 0.9 mm. Analysing the H° comparison between T2CC-T2, the difference was −1.1°. The T2CC-T2 comparison in the sagittal plane showed a difference of 0.9 mm for the MS and 0.7 mm for the DS. The accuracy was 82% for molar derotation movement. In conclusion, CA provides the upper arch expansion associated with the upper first molars’ distal rotation. These movements provide 2 mm of improvement in arch perimeter and molar intercuspation.

show abstract

Análise da posição rotacional do primeiro molar permanente superior na má oclusão de Classe II Divisão 1

Cited by 4 publications

References 9 publications

Correlation between the Rotation of the First Molars and theSeverity of Class II Division 1 Malocclusion

Correlation between the Rotation of the First Molars and theSeverity of Class II Division 1 Malocclusion

The importance of upper first permanent molars position for the orthognatic occlusion

Analysis of Maxillary First Molar Derotation with Invisalign Clear Aligners in Permanent Dentition

Contact Info

Product

Resources

About