scholarly journals Assessment of Maxillary Third Molar Status Before and After Orthodontic Treatment in Adolescent Patients

2020 ◽  
Vol 70 (12) ◽  
pp. 4381-4386
Keyword(s):  
Orthodontic Treatment ◽  
Third Molar ◽  
Occlusal Plane ◽  
Maxillary Molars ◽  
Maxillary Third Molar ◽  
Before And After ◽  
Maxillary Molar ◽  
Angular Measurements ◽  
Upper Third ◽  
Upper Molar

Third maxillary molar prediction for impaction and eruption should be part of the orthodontic treatment planning. In our study we evaluated the reliability of some linear and angular measurements used for the assessment of maxillary third molar status by comparing them before and after orthodontic treatment. 208 upper third molars were analyzed, 148 at patients who undergone non extraction orthodontic treatment and 60 at patients where first premolar extractions were performed.We analyzed on orthopantomograms taken at the beginning and at the end of the orthodontic the ratio between the dimension of the retromolar space and the mesio distal diameter of the third molar, the angle between the long axis of third molar and the occlusal plane and the angle between the long axis of the second and third maxillary molars. We found significant changes in retromolar space dimension after orthodontic treatment with premolars removal and slight average increase in the non extraction group. We didn’t find significant statistical differences before and after orthodontic treatment neither between the angulations of the maxillary third molar with the occlusal plane, nor with the second upper molar (p>0.05) in both groups. The conclusion is that the type of orthodontic treatment has little or no influence upon third molar angulation and this parameter can be used as a predictive factor for third molar status from the beginning of the orthodontic treatment. Keywords: third maxillary molar; retromolar space; angulation

scholarly journals Efficiency of the skeletonized Pendulum K appliance for non-compliance maxillary molar distalization

2021 ◽  
Author(s):  
Gero Stefan Michael Kinzinger ◽  
Jan Hourfar ◽  
Jörg Alexander Lisson
Keyword(s):  
Side Effects ◽  
Lower Percentage ◽  
Molar Distalization ◽  
Maxillary Molars ◽  
Maxillary Molar ◽  
Force Moment ◽  
Maxillary Premolars ◽  
Anchorage Loss ◽  
Upper Molar

Abstract Purpose Conventional anchorage with exclusively intraorally anchored appliances for non-compliance molar distalization combines a palatal acrylic button with periodontal anchorage. This type of anchorage is critically discussed because of the temporary hygienic impairment of the palate and the uncertain anchoring quality of the button. A purely dentally/periodontally anchored Pendulum K appliance was developed, which is exclusively anchored via four occlusal rests. The aims of this pilot study were to examine the suitability of the skeletonized Pendulum K for distalization of maxillary molars, and to investigate the quality of this alternative anchoring modality. Patients and methods In all, 10 patients received skeletonized Pendulum K appliances attached to all maxillary premolars for bilateral molar distalization. Supporting anchorage through an acrylic button adjacent to the anterior palate was not used. The pendulum springs were initially activated on both sides with a distalization force of 220 cN each and provided with uprighting and toe-in bends. The specific force/moment system was regularly reactivated intraorally by adjustment of the distal screw. Results The study demonstrates the suitability of the skeletonized Pendulum K appliance for the distalization of maxillary molars (3.28 ± 0.73 mm). Side effects on the molars were slight distal tipping (3.50 ± 2.51°/PP, 3.00 ± 1.41°/SN) and mesial inward rotation (average 2.75 ± 7.50° and 4.50 ± 12.77°). Significant anchorage loss occurred in the form of mesialization of the incisors by 1.40 ± 0.82 mm and of the first premolars by 2.28 ± 0.85 mm. Conclusion The skeletonized Pendulum K appliance allows compliance-free upper molar distalization. Exclusively dental/periodontal anchorage resulted in a lower percentage of molar distalization compared to a conventional anchoring preparation of the Pendulum K with a palatal acrylic button. Anchorage loss had a comparatively stronger effect on the anchoring premolars but less on the incisors. Typical side effects on the molars such as distal tipping and mesial inward rotation were remarkably low.

scholarly journals Dentoskeletal Class II Malocclusion: Maxillary Molar Distalization with No-Compliance Fixed Orthodontic Equipment

2020 ◽  
Vol 8 (1) ◽  
pp. 26
Author(s):  
Vincenzo Quinzi ◽  
Enrico Marchetti ◽  
Luigi Guerriero ◽  
Floriana Bosco ◽  
Giuseppe Marzo ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Final Analysis ◽  
Class Ii ◽  
Dental Arch ◽  
Class Ii Malocclusion ◽  
Exclusion Criteria ◽  
Molar Distalization ◽  
Maxillary Molars ◽  
Maxillary Molar ◽  
Orthodontic Devices

Dentoskeletal class II malocclusion due to a protruded upper dental arch is a major reason for an orthodontic treatment. In these cases, the correction of class II can be hindered by molar distalization, obtained with ‘no-compliance therapy’ that involves the use of appliances which minimize the need for such co-operation and attempt to maximize the predictability of results. The aim of this review was to outline the effectiveness of no-compliance fixed orthodontic devices in the molar distalization. After selection according to the inclusion/exclusion criteria, 16 articles from 2000 to 2019 were qualified for the final analysis. The literature shows various no-compliance fixed devices whose effect is to distalize the maxillary molars. The present revision allows to conclude that there is a need to increase the number of studies, especially with regard to the most recently introduced devices in the literature. The analysed studies allow to hypothesize that these appliances act with a minimal variability of molar distalization and disto-inclination among them, although different effects among the appliances can be observed as regards to the anchorage.

scholarly journals Changes of occlusal plane inclination after orthodontic treatment with four premolars extraction in dento-alveolar bimaxillary protrusion cases

2009 ◽  
Vol 21 (2) ◽  
Author(s):  
NR Yuliawati Zenab ◽  
Tono S. Hambali ◽  
Jono Salim ◽  
Endah Mardiati
Keyword(s):  
Orthodontic Treatment ◽  
Occlusal Plane ◽  
Test Analysis ◽  
Sexual Discrimination ◽  
Lateral Cephalograms ◽  
Before And After ◽  
Orthodontic Patients ◽  
Fixed Appliances ◽  
Bimaxillary Protrusion ◽  
Paired T Test

The purpose of this study was to find out whether there were changes in occlusal plane inclination after fixed orthodontic treatment of bimaxillary protrusion cases where extraction of four first premolars was needed using the standard Edgewise appliances. The sample was fourteen orthodontic patients, aged above sixteen years old, no sexual discrimination, treated with fixed appliances at Orthodontic Specialist Clinic Faculty of Dentistry Universitas Padjadjaran. The method was a pre-post design which compared occlusal plane inclination obtained from tracings of lateral cephalograms before and after orthodontic treatment. The results were calculated with the paired t-test analysis. The study revealed that there were no significant changes in occlusal plane inclination after the orthodontic treatment.

scholarly journals Intraoral Maxillary Molar Distalization

2006 ◽  
Vol 76 (6) ◽  
pp. 923-929 ◽  
Author(s):  
Ingela Karlsson ◽  
Lars Bondemark
Keyword(s):  
Sample Size ◽  
Orthodontic Treatment ◽  
Treatment Time ◽  
Sample Size Calculation ◽  
Movement Rate ◽  
Molar Distalization ◽  
Maxillary Molars ◽  
Maxillary Molar ◽  
The Mean ◽  
Anchorage Loss

Abstract Objective: To evaluate the maxillary molar distalization and anchorage loss in two groups, one before (MD 1 group) and one after (MD 2 group) eruption of second maxillary molars. Materials and Methods: After a sample size calculation, 20 patients were recruited for each group from patients who fulfilled the following criteria: no orthodontic treatment before distal molar movement, Class II molar relationship defined by at least end-to-end molar relationship, space deficiency in the maxilla, and use of an intra-arch NiTi coil appliance with a Nance appliance to provide anchorage. Patients in the MD 1 group were without any erupted second molars during the distalization period, whereas in the MD 2 group both the first and second molars were in occlusion at start of treatment. The main outcome measures to be assessed were: treatment time, ie, time in months to achieve a normal molar relation, distal movement of maxillary first molars, and anterior movement of maxillary incisors (anchorage loss). The mean age in the MD 1 group was 11.4 years; in the MD 2 group, 14.6 years. Results: The amount of distal movement of the first molars was significantly greater (P < .01) and the anchorage loss was significantly lower (P < .01) in the group with no second molars erupted. The molar distalization time was also significantly shorter (P < .001) in this group, and thus the movement rate was two times higher. Conclusions: It is more effective to distalize the first maxillary molars before the second molars have erupted.

Third upper molar enlargement in sigmodontine rodents (Cricetidae): morphological disparity and evolutionary convergence

Mammalia ◽  
2020 ◽  
Vol 84 (3) ◽  
pp. 278-282 ◽  
Author(s):  
Christophe Ronez ◽  
Franck Barbière ◽  
Luciano De Santis ◽  
Ulyses F.J. Pardiñas
Keyword(s):  
Third Molar ◽  
Single Plane ◽  
Morphological Disparity ◽  
Second Molar ◽  
Evolutionary Convergence ◽  
Upper Third ◽  
Upper Molar

AbstractWe studied the enlargement of the upper third molar (M3), with respect to the upper second molar in sigmodontine rodents, the largest subfamily of living cricetids. M3 is enlarged in extant and extinct members of at least six tribes (Andinomyini, Euneomyini, Oryzomyini, Phyllotini, Reithrodontini and Sigmodontini), all of them also sharing hypsodonty, planate crowns and overall dental simplification in the context of Sigmodontinae. Enlargement is expressed in four ways, including simplification or modest complication of occlusal design on a single plane. M3 enlargement in sigmodontines is primarily associated with increasing herbivory rather than strictly with phylogeny, and thus presents a classic example of evolutionary convergence.

scholarly journals Modified Caldwell-Luc Technique to retrieval of tooth fragment displaced into the maxillary sinus: A case report

2021 ◽  
Vol 10 (2) ◽  
pp. e26210212353
Author(s):  
José Wittor de Macêdo Santos ◽  
Emily Ricelly da Silva Oliveira ◽  
Humberto Pereira Chaves Neto ◽  
Fernanda Soares Ramos ◽  
Braz da Fonseca Neto ◽  
...  
Keyword(s):  
Maxillary Sinus ◽  
Foreign Bodies ◽  
Early Stage ◽  
Maxillary Sinusitis ◽  
Third Molar ◽  
Third Molar Surgery ◽  
Surgical Removal ◽  
Maxillary Molars ◽  
Upper Third ◽  
Maxillary Sinuses

During the surgical removal of maxillary molars, tooth or fragment displacement into the maxillary sinus may occur. The presence of foreign bodies inside these cavities leads to complications such as mucoceles, cellulitis, oroantral fistulae and maxillary sinusitis, to prevent the arise and worsening of complications, these events must be addressed in an early stage. This article aims to report the removal of a tooth root from the maxillary sinus, through the modified Caldwell-Luc (CLM) approach and describe the current indications for the Caldwell Luc technique. It reports an upper third molar surgery in which a patient had the distal root of the left superior third molar displaced into the maxillary sinus, later showing signs of sinus opacification and loss of patency of the maxillary ostium obstructed by the root. After antibiotic treatment, the root was recovered through the CLM technique by local anesthesia, without complications. Foreign bodies in the maxillary sinuses must be urgently addressed, avoiding the development of infectious conditions, the CLM approach is the choice approach to manage these complications by a simple and safe way.

scholarly journals Correction of Unilateral Condylar Hyperplasia and Posterior Open Bite with Proportional Condylectomy and Fixed Orthodontic Treatment

2019 ◽  
Vol 90 (1) ◽  
pp. 144-158 ◽  
Author(s):  
Sang-Woon Ha ◽  
Jin-Young Choi ◽  
Seung-Hak Baek
Keyword(s):  
Orthodontic Treatment ◽  
Facial Asymmetry ◽  
Open Bite ◽  
Occlusal Plane ◽  
Class Iii ◽  
Anterior Open Bite ◽  
Maxillary Molars ◽  
Condylar Head ◽  
Condylar Hyperplasia ◽  
The Right

ABSTRACT A 29-year-old female patient with unilateral condylar hyperplasia (UCH) of the left side presented with facial asymmetry, maxillary transverse occlusal plane (MXTOP) cant, posterior open bite, and Class III relationship. Treatment consisted of proportional condylectomy of the left condyle for management of UCH, and fixed orthodontic treatment with intrusion of the left maxillary molars to correct the MXTOP cant and remaining chin point deviation (CPD). Proportional condylectomy with a 14-mm resection of the left condylar head improved the CPD from 11.5 mm to 7.8 mm and resolved the posterior open bite on the left side. However, it produced a Class II relationship on the right and left sides, posterior open bite on the right side, and anterior open bite. Fixed orthodontic treatment with 1.8-mm intrusion of the left maxillary molars using miniscrews corrected the MXTOP cant from 3.5 mm to 1.7 mm, reduced the remaining CPD from 7.8 mm to 3.7 mm, produced counterclockwise rotation of the mandible, and resolved the posterior open bite on the right side and the anterior open bite. After 16 months of total treatment, normal overbite/overjet and Class I relationship were obtained. Treatment results were well maintained after 5 years of retention. For the correction of UCH, it is important to determine the amount of condylar head resection and accurately simulate the correction of CPD and MXTOP cant through intrusion of the maxillary molars.

scholarly journals An Integrated Approach, Orthodontic and Prosthetic, in a Case of Maxillary Lateral Incisors Agenesis

Prosthesis ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Portelli ◽  
Militi ◽  
Logiudice ◽  
Nucera
Keyword(s):  
Orthodontic Treatment ◽  
Anterior Part ◽  
Integrated Approach ◽  
Dental Arch ◽  
Missing Teeth ◽  
Deep Bite ◽  
Maxillary Molars ◽  
Maxillary Molar ◽  
The University ◽  
Distal Jet

Background: Among tooth anomalies, missing teeth is one of the most frequent, and it can be related to different therapeutical sets of problems. Often, an integrated approach that interests both orthodontists and prosthodontists is necessary, and in some cases also the periodontists. Methods: In this paper the authors report a clinical case of a 14-year-old patient, affected by maxillary bilateral incisors agenesis, molar bilateral II class and deep bite, treated in the Department of Orthodontics and Pedodontics of the University of Messina. The orthodontic treatment target was the distal movement of the maxillary molar, and the recovery of the space necessary for the prosthetic restoration of the missing lateral incisor. Maxillary molars distal movement was performed with a Distal Jet apparatus, skeletally supported by two miniscrews (Distal-Screw, American Orthodontics, Sheboygan, WI, USA). After molar relationship correction, a multi-bracket bimaxillary orthodontic appliance was bonded using Empower Brackets (American Orthodontics, Sheboygan, WI, USA). At the end of orthodontic treatment a Maryland bridge, bonded on the central incisors and cuspids, was used in order to maintain the space necessary for the insertion of dental implants in the region of 1.2 and 2.2 Results: A class II molar relationship was corrected, with an improvement of the deep bite, and the space necessary for implant insertion was recovered Conclusion: A skeletally supported Distal Jet was efficient for molar distalization, with the advantage of not having any loss of anchorage in the anterior part of the dental arch. This apparatus does not need patient compliance, have favorable aesthetics and also give the possibility to perform asymmetric activations.

scholarly journals Buccolingual Inclination Control of Upper Central Incisors of Aligners: A Comparison with Conventional and Self-Ligating Brackets

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Maria Francesca Sfondrini ◽  
Paola Gandini ◽  
Tommaso Castroflorio ◽  
Francesco Garino ◽  
Luca Mergati ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Orthodontic Treatment ◽  
Radiographic Evaluation ◽  
Before And After ◽  
Conventional Brackets ◽  
Angular Measurements ◽  
Orthodontic Devices

Objective. The upper incisors torque expression is essential for the orthodontic treatment accuracy. Various orthodontic devices are claimed to have different inclination control capacity. The purpose of this retrospective study was to compare the radiographic buccolingual inclination of upper incisors in patients treated with three different orthodontic techniques. Material and Methods. Conventional brackets (Victory, 3M), self-ligating appliances (Damon Q, Ormco), and aligners (Invisalign, Align Technology) were tested. Cephalometric data of 25 patients with similar skeletal and dental pretreatment parameters were collected for each technique. Position changes of upper central incisors were assessed with radiographic evaluation before and after therapy. Three different parameters were considered: 11∧SnaSnp, 11∧Ocl and I+ TVL. All variables were measured before (T0) and after (T1) treatment and their variation over treatment was assessed. Results. When evaluating angular measurements, 11∧SnaSnp and 11∧Ocl angles showed the highest numeric variation with conventional brackets. Lowest values were reported with aligners. However, the differences among various techniques were not significant for both angles (P>0.05). Also I+ TVL linear value variation did not show significant differences among the different groups tested (P>0.05). Conclusion. Conventional multibrackets appliance showed the highest incisal position variations over treatment, but the differences among various groups were not significantly different.

scholarly journals Angulation change of the third molar tooth in orthodontic treatment

2017 ◽  
Vol 2 (1) ◽  
pp. 40
Author(s):  
Ardiansyah S. Pawinru
Keyword(s):  
Orthodontic Treatment ◽  
Third Molar ◽  
Molar Tooth ◽  
Wilcoxon Test ◽  
Good Effect ◽  
The Third ◽  
Mandibular Third Molar ◽  
Retrospective Clinical Study ◽  
Before And After ◽  
Measured Change

Objective : Impaction of the third molar tooth mandibular is often found in patients with orthodontic treatment. In orthodontic treatment, extraction cases of impaction of the third molar tooth are usually performed, but the patients often refuse this extraction. Extraction of premolar has a good effect on the third molar mandibular angulation during treatment.Material and Methods : This study is a retrospective clinical study with descriptive analytic to find out the effect of the first mandibular premolar tooth extraction to angulation change of the third molar mandibular in orthodontic treatment with a standard edgewise method. Angulation change was performed by comparing the third molar mandibular angulation before and after orthodontic treatment with panoramic radiographs. Angulation of the third molar tooth mandibular was calculated from the angle formed between the long axis of the tooth with the reference line infraorbita.Results : The sample comprised 60 of impacted mandibular third molar region of the left and right regions of 30 patients who had been treated declared cured in clinic of orthodontic specialist of Dentistry Faculty Padjadjaran University. The sample was divided into three (3) groups of patients before treatment angulation of the third molar tooth mandibular under 300, 300 to 600 and above 60o, then measured change of angulation and observed whether it increased, fixed or decreased. Results were analyzed by T- test and Wilcoxon test showed that there was a significant change in angulation of the third molar mandibular in orthodontic treatment with the first premolar tooth mandibular extraction.Conclusion : This study is that the first premolar tooth mandibular extraction affects the angulation of the third molar tooth mandibular after orthodontic treatment.

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