Comparison of two implant-supported molar distalization systems

ABSTRACT Objective: To examine skeletal, dental, and soft tissue effects of the Miniscrew Implant Supported Distalization System (MISDS) and the Bone-Anchored Pendulum Appliance (BAPA). Materials and Methods: Among 28 patients displaying Angle Class II malocclusion, 14 patients with a mean age of 14.8 ± 3.6 years treated with MISDS were included in the first group, and 14 patients with a mean age of 14.5 ± 1.5 years treated with BAPA were included in the second group. The pretreatment and posttreatment lateral cephalograms were analyzed. Statistical evaluation was carried out using the paired Shapiro-Wilk test, the paired-sample t-test, and the unpaired t-test. Results: Upper posterior teeth were distalized successfully in both groups. Nearly bodily distalization was seen in the MISDS group, whereas significant distal tipping of the upper first molars was observed in the BAPA group (P < .001). There were no statistically significant changes in the sagittal position of the maxilla and mandible and in the position of the upper incisors as a result of treatment in either group. Conclusions: Both methods provided absolute anchorage for distalization of posterior teeth; however, almost translatory distal movement was encountered in the MISDS group, and substantial distal tipping of the maxillary molars accompanied distalization in the BAPA group.

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Evaluation of the effects of the hybrid Pendulum in comparison with the conventional Pendulum appliance

The Angle Orthodontist ◽

10.2319/051719-340.1 ◽

2019 ◽

Vol 90 (2) ◽

pp. 194-201

Author(s):

Erdal Bozkaya ◽

Tuba Tortop ◽

Sema Yüksel ◽

Emine Kaygısız

Keyword(s):

Wilcoxon Test ◽

Treatment Results ◽

Molar Distalization ◽

Angle Class Ii ◽

Maxillary Molars ◽

Lateral Cephalograms ◽

Maxillary Molar ◽

Pendulum Appliance ◽

The Mean ◽

Anchorage Loss

ABSTRACT Objective: To evaluate the anchorage control and distalization of maxillary molars with the hybrid Pendulum appliance and to compare the results with a conventional Pendulum appliance. Materials and Methods: This study was carried out on the pre-(T0) and post-(T1) treatment lateral cephalograms and dental casts of 43 patients with Angle Class II molar relationships who were treated with conventional or hybrid Pendulum appliances. The hybrid Pendulum (HP) group consisted of 22 patients (14 females; eight males; mean age 14.3 ± 2.43 years) and treatment results were compared with a conventional Pendulum appliance (CP) group, which consisted of 21 patients (15 females; six males; mean age 14.6 ± 3.39 years). Intragroup comparisons were made with Wilcoxon test and intergroup comparisons were made with Mann-Whitney U-test (P < .05). Results: The mean distalization duration was 0.70 ± 0.25 years in the HP group and 0.83 ± 0.4 years in the CP group. Maxillary first molars showed significant distal movement and tipping of 4.25 mm and 9.09° in the HP group, and 3.21 mm and 9.86° in the CP group. Loss of anchorage at the first premolars was significantly smaller in the HP appliance group compared to CP group. The second premolars distalized spontaneously in the HP group while they mesialized significantly in the CP group. Proclination and protrusion of maxillary incisors were greater with the CP appliance compared to the HP appliance. Conclusions: Maxillary molar distalization was achieved with both appliances. Mesialization of the anchorage unit was controlled successfully with the hybrid Pendulum; however, the conventional Pendulum appliance caused anchorage loss.

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Adequacy of molar distalization after second and third molar eruption- a case report

International Journal of Dental Research ◽

10.14419/ijdr.v6i2.9676 ◽

2018 ◽

Vol 6 (2) ◽

pp. 50

Author(s):

Sarath Babu Balina ◽

Durga Harsha G V ◽

Padmapriya C V ◽

Varma DPK ◽

Goutham C V

Keyword(s):

Third Molar ◽

Class Ii ◽

Class Ii Malocclusion ◽

Average Growth ◽

Mini Implants ◽

Maxillary Molars ◽

Extraction Therapy ◽

Patient Reported ◽

Maxilla And Mandible ◽

Third Molar Eruption

Adult patients with class II malocclusion can be treated routinely by extraction therapy. In the recent decades there was increasing popularity towards non-extraction treatment. Distalization of maxillary molars is one of the prime treatment modality to correct mild to moderate class II malocclusion cases with esthetically acceptable profile. A 16 years old female patient reported with irregularly placed upper front teeth and was diagnosed as Angle’s Class II malocclusion with orthognathic maxilla and mandible, average growth pattern. Treatment was planned to distalize the entire maxillary arch using mini implants as skeletal anchorage. 4.0 mm of maxillary molars were distalized, class I molar and canine relation were achieved bilaterally within span of 10 months without altering the patient’s existing profile.

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Comparative Distalization Effects Of Conventional Pendulum Appliance And Bone Anchored Pendulum Appliance

Journal of Health and Allied Sciences NU ◽

10.1055/s-0040-1708737 ◽

2018 ◽

Vol 08 (01) ◽

pp. 03-010

Author(s):

Crystal Runa Soans ◽

Ashutosh Shetty ◽

Murali P.S ◽

Azhar Mohammed ◽

U.S Krishna Nayak ◽

...

Keyword(s):

Soft Tissue ◽

Orthodontic Anchorage ◽

Molar Distalization ◽

Maxillary Molars ◽

Lateral Cephalograms ◽

Treatment Stage ◽

Pendulum Appliance ◽

Pre Treatment ◽

Anchorage Loss ◽

Dental Cast

Abstract Introduction: The introduction of intraosseous screws as temporary orthodontic anchorage devices has proved successful in achieving sufficient molar distalization without major anchorage loss in Class II malocclusions. Bone-anchored pendulum appliance is used to obtain an effective and compliance-free molar distalization without anchorage loss. Aims And Objectives: This prospective study was designed to evaluate and compare the skeletal and dentoalveolar effects produced by 2 types of pendulum appliance with different anchorage modalities - the Bone anchored pendulum appliance (BAPA) and Conventional pendulum appliance (CPA) in subjects with Angle's ClassII malocclusion. Materials and Methods: BAPA group consisted of 5 patients with mean age, 16.4±1.5 years. The CPA group consisted of 5 patients with mean age, 16.6±1.1 years. Lateral cephalograms & dental casts were obtained at pre-treatment stage & after achieving Class I molar relation. Dentoalveolar, skeletal, soft tissue measurements and dental cast measurement were recorded & compared between the groups. Results and Conclusions: Successful distalization was achieved in both groups in a mean period of 6.2 months for BAPA and 5.2 months for CPA. It was concluded that, both theBAPA and CPA were effective for the distalization of maxillary molars. Though the distal molar movements obtained were similar between the BAPA and the CPA groups, anchorage loss was observed with the CPA in the form of premolar mesialization & incisor proclination, whereas absence of anchorage loss, significant spontaneous distal premolar movement, and distal incisor movement was observed with the BAPA, making it a viable choice compared to the CPA.

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Predictability of ANB, Beta, and YEN Angles as Anteroposterior Dysplasia Indicators in Gulbarga Population

The Journal of Indian Orthodontic Society ◽

10.1177/0301574220912598 ◽

2020 ◽

Vol 54 (4) ◽

pp. 321-324

Author(s):

Chandrika G. Katti ◽

Archana Mohan ◽

Abhi A

Keyword(s):

Variable Parameter ◽

Class Ii ◽

Class Ii Malocclusion ◽

Angular Parameter ◽

Skeletal Class ◽

Skeletal Class Ii ◽

Pearson Coefficient ◽

Lateral Cephalograms ◽

Skeletal Pattern ◽

Maxilla And Mandible

In orthodontics, various methods of assessing sagittal jaw base relationship are formulated. Earlier, skeletal pattern was analyzed only clinically; however, after the introduction of cephalometrics by Broadbent and Hofrath in 1931, ANB and Beta angles are being used to describe skeletal discrepancies between the maxilla and mandible. YEN angle has also been used as a sagittal dysplasia indicator after its introduction in 2009. The aim of our study is to assess the predictability of ANB, Beta, and YEN angles as anteroposterior dysplasia indicators in skeletal class II malocclusion in Gulbarga population. This study is an attempt to check the variation as well as correlation existing between these 3 parameters, so that a more presumable and least variable parameter can be obtained. Total of 70 lateral cephalograms of skeletal class II patients were selected based on Down’s facial angle and tracing was carried out manually to measure ANB, Beta, and YEN angles. Statistical analysis was carried out to assess the coefficient of variation and the Pearson coefficient. Our study concluded that YEN angle is highly predictable and a homogenously distributed angular parameter used to assess sagittal discrepancy in class II patients compared to ANB and Beta angles.

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Study of occlusion in patients with Angle Class I and Class II malocclusions

Romanian Journal of Stomatology ◽

10.37897/rjs.2015.2.9 ◽

2015 ◽

Vol 61 (2) ◽

pp. 161-166

Author(s):

Sergiu-Alexandru Rădulescu ◽

◽

Andreea Paula Rădulescu ◽

Florina Trîmbiţaş ◽

Ecaterina Ionescu ◽

...

Keyword(s):

Statistical Analysis ◽

Class Ii ◽

Class I ◽

Class Ii Malocclusion ◽

Practical Application ◽

Posterior Teeth ◽

Angle Class Ii ◽

Angle Class ◽

Average Total Number

Objective. In this study we tried to notice the differences in the number and type of occlusal contacts present in patients with Angle Class I and Class-II malocclusions. Materials and methods. For this study were examined 30 patients with Angle Class I and Class-II malocclusions. Identification of the number and type of occlusal contacts was made both clinically and with the help of study casts mounted in an semiadjustable articulator. Results and discussion. In the Angle Class I malocclusion average total number of occlusal contacts was 36.93 and in Angle Class-II malocclusion was 31.46 contacts. Most occlusal contacts identified were side cusp – side fossa type. Following statistical analysis we did not fi nd significant differences between the two classes of malocclusions, in terms of total number of occlusal contacts. Conclusions. The total number of occlusal contacts does not differ depending on the malocclusion class, but there are differences between the number of contacts occurring within certain groups of posterior teeth. In order to have findings with practical application it is necessary to carry out more studies on the type and number of occlusal contacts that may occur in individuals with malocclusions.

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Mastication

Anatomy for Dental Students ◽

10.1093/oso/9780199234462.003.0035 ◽

2013 ◽

Author(s):

Martin E. Atkinson

Keyword(s):

Occlusal Plane ◽

Dental Arch ◽

Posterior Teeth ◽

Maxillary Molars ◽

Anterior Teeth ◽

Occlusal Surfaces ◽

Mandibular Teeth ◽

Maxilla And Mandible ◽

Dynamic Relationships ◽

Muscles Of Mastication

Now you have an understanding of the anatomy of the maxilla and mandible, the TMJs, and jaw musculature, we can examine how these structures work together to produce the complex actions involved in the biting and chewing of food. Technically, incision is biting a piece from a larger chunk of food and mastication is the grinding down of that piece into smaller components and mixing them with saliva. Mastication is often used to cover both actions. Box 26.1 briefly compares the anatomy of the human dentition to that of other mammals. As well as knowledge of the TMJ, muscles of mastication, and other muscles used in jaw movements, it is necessary to appreciate some aspects of the static and dynamic relationships of the teeth to understand chewing movements. The first thing to notice is the bigger width of the upper dental arch compared to the lower arch, a condition known as anisognathy. In Figure 26.1A , you can see that the maxillary molars overhang the mandibular teeth by half a cusp width so the buccal cusps of the lower molars and premolars occlude between the buccal and palatal cusps of the maxillary teeth. Observe also that the long axis of the maxillary molars and premolars incline buccally while the corresponding axis of the mandibular teeth incline lingually; the occlusal plane of the posterior teeth is thus curved transversely as illustrated in Figure 26.1A . It would be possible to chew food simply by moving the teeth up and down without any side-to-side movement, but this would be inefficient and not make full use of the cusps on the occlusal surfaces of posterior teeth. However, we can only chew on one side at a time because of the anisognathy of the upper and lower teeth. Due to anisognathic jaw positions, the maxillary anterior teeth are also going to protrude in front of the mandibular anterior teeth. Figure 26.1B illustrates the normal relationships of the anterior teeth. The maxillary incisors overhang the mandibular incisors by about 2–3 mm in the horizontal plane; this is called the overjet. The upper incisors usually have a vertical overhang, the overbite, of about the same amount. As mentioned in Chapter 24 , the mouth at rest is closed by tonic contraction of the muscles of mastication and facial expression.

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Soft Tissue Profile after Distal Molar Movement with a Pendulum K-Loop Appliance Versus Cervical Headgear

The Angle Orthodontist ◽

10.2319/011107-10.1 ◽

2008 ◽

Vol 78 (2) ◽

pp. 317-323 ◽

Cited By ~ 6

Author(s):

Omur Polat-Ozsoy ◽

Aylin Gokcelik ◽

Ahu Güngör-Acar ◽

Beyza Hancioglu Kircelli

Keyword(s):

Soft Tissue ◽

Loop Group ◽

T Test ◽

Upper Lip ◽

Skeletal Class ◽

Soft Tissue Profile ◽

Lateral Cephalograms ◽

Significant Difference ◽

Treatment Changes ◽

Pendulum Appliance

Abstract Objective: To evaluate the soft tissue changes associated with the pendulum appliance that was supported with a K-loop buccally and to compare these treatment changes with a cervical headgear group. Materials and Methods: The records of 30 patients having skeletal Class I, dental Class II malocclusions were divided to two groups. Group 1 consisted of 7 girls, 8 boys (mean age, 15.0 ± 3.4 years), and Group 2 consisted of 10 girls, 5 boys (mean age 14.2 ± 2.9 years). The first group was treated with a pendulum appliance that was supported with a K-loop buccally, and the second group was treated with cervical headgear. Lateral cephalograms were taken at the beginning of treatment and at the end of distal molar movement. Treatment changes within the groups were analyzed using the paired t-test, and between group changes were analyzed with the independent t-test. Results: The results showed that the pendulum/K-loop appliance had no significant effect on skeletal and dental variables and soft tissue A point, upper lip thickness, and sagittal upper lip position relative to the E plane. A significant difference for the change in Vp-Ls distance was found in patients in the pendulum/K-loop group (P < .05). Patients in the cervical headgear group showed significant retrusion in skeletal, dental, and soft tissue measurements (P < .05). Conclusions: The pendulum/K-loop appliance produces distal molar movement without causing any significant changes in the sagittal or vertical positions of either the jaw or the soft tissue profile.

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Angle Class II, subdivision, with agenesis of mandibular second molars and extrusion of maxillary second molars

Dental Press Journal of Orthodontics ◽

10.1590/2176-9451.20.2.110-118.bbo ◽

2015 ◽

Vol 20 (2) ◽

pp. 110-118

Author(s):

Rubens Rodrigues Tavares

Keyword(s):

Multidisciplinary Approach ◽

Case Reports ◽

Class Ii ◽

Class Ii Malocclusion ◽

Angle Class Ii ◽

Maxillary Molars ◽

Angle Class ◽

Dentofacial Orthopedics ◽

Partial Fulfillment ◽

Subsequent Rehabilitation

This clinical case reports the treatment of an Angle Class II malocclusion in a young woman with a balanced face affected by agenesis of second and third mandibular molars and subsequent extrusion of second maxillary molars. The atypical and peculiar occlusal anomaly led to individualized treatment proposed in order to normalize dental malpositions, with subsequent rehabilitation of edentulous areas by means of a multidisciplinary approach. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO) in partial fulfillment of the requirements for obtaining the title of certified by the BBO.

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Maxillary premolars extraction or molar distalization with or without TADs: cephalometric evaluation of soft tissue changes in Class II treatment

South European Journal of Orthodontics and Dentofacial Research ◽

10.5937/sejodr7-23776 ◽

2020 ◽

Vol 7 (1) ◽

pp. 4-11

Author(s):

Lorenz Moser ◽

Enrica Di Lorenzo ◽

Marco Serafin ◽

Giuliano Maino ◽

Ute Schneider-Moser ◽

...

Keyword(s):

Soft Tissue ◽

Class Ii ◽

Growth Spurt ◽

Class Ii Malocclusion ◽

Premolar Extraction ◽

Class Ii Treatment ◽

Lateral Cephalograms ◽

Tissue Changes ◽

Pendulum Appliance ◽

Soft Tissue Changes

Introduction: Problem solving in Class II malocclusion treatment performed with premolars extractions or distalizing techniques in relation to the profile modification. Aim: To cephalometrically compare soft tissue changes produced either by maxillary premolar extraction, tooth-borne Pendulum appliance or bone-borne MGBM appliance. Materials and Methods: Both pre- (T1) and post-treatment (T2) lateral cephalograms of 89 skeletal Class II patients (36 M, 53 F), treated during pubertal growth spurt, were retrospectively selected. Three groups were formed based on the therapy performed: 30 patients had been treated with maxillary first premolars extraction (U4), 31 patients with a conventional tooth-borne distalizing with Pendulum appliance (PA), and 28 patients with a skeletally anchored distalizing appliance (MGBM). Soft tissue was analyzed comparing upper (UL) and lower (LL) lip’s points with regard to True Vertical Line (TVL) and Esthetic plane (E-plane). Skeletal and dental values have been recorded in order to cephalometrically compare ΔT2-T1 changes among groups and to correlate dental and skeletal changes to profile modifications. One-way ANOVA was employed to compare groups at T1. Paired sample t-tests were employed to assess significant intra- and intergroup differences between T2 and T1. Significance level was set at 0.05 Results: UL and LL showed a slight but not significant retrusion relative to TVL in all three groups. UL and LL distances to E-plane were not statistically significant among U4, PA, and MGBM groups. Independently of the treatment, UL was tangent to TVL in all groups. No statistically significant differences have been shown in skeletal records. Significant differences were recorded in Overjet among U4 than PA and MGBM groups. Conclusions: Class II malocclusion treatment with maxillary first premolar extraction, conventional or skeletal distalization did not significantly affect the profile producing similar changes in the soft tissue.

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