scholarly journals Comparison of objective wear time between monoblock and twin-block appliances measured by microsensor

2021 ◽  
Author(s):  
Cansın Kutay ◽  
Hülya Kılıçoğlu ◽  
Gülşilay Sayar
Keyword(s):  
Study Groups ◽  
Prospective Clinical Study ◽  
Twin Block ◽  
Skeletal Class ◽  
Wear Time ◽  
Skeletal Class Ii ◽  
Significant Difference ◽  
The Mean ◽  
Group 2 ◽  
Mandibular Retrognathia

ABSTRACT Objectives To assess the objective compliance levels in skeletal Class II patients with mandibular retrognathia wearing monoblock and twin-block appliances. Materials and Methods A prospective clinical study was conducted with 30 patients between 10 and 15 years old who were equally divided into two study groups. Group 1 was treated with monoblock, and group 2 was treated with twin-block appliances. The patients were instructed to wear their appliance for 15 hours per day. Wear times were monitored by a microsensor. (TheraMon; MCTechnology, Hargelsberg, Austria) for an average of six appointments. Patients were also instructed to record their wear times on a chart, and this record was admitted as subjective wear time. Statistical analysis was performed with the data derived from both the patients' charts and the monitoring records. Results The mean wear time by the patients was 10.67 ± 3.93 hours, which was less than the 15 hours prescribed by the orthodontist, with no difference between the two appliances (P > .05). The regular use rate, which included the days with a wear time of 8 hours or more per day, was 75%. Compliance levels decreased by 35% throughout the six control appointments. Patients declared that their wear time was more than their objective wear time by an average of 3.76 hours. Conclusions Despite their different designs, there was no significant difference between the monoblock and twin-block appliances in terms of compliance.

scholarly journals Cephalometric Evaluation of Nasopharyngeal Airway and Hyoid Bone Position in Subgroups of Class II Malocclusions

2020 ◽  
pp. 290-302
Author(s):  
Muhammed Hilmi Buyukcavus ◽  
Gönül Kocakara
Keyword(s):  
Hyoid Bone ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Retrospective Clinical Study ◽  
Significant Difference ◽  
Nasopharyngeal Airway ◽  
Mandibular Retrognathia ◽  
Airway Dimensions

The aim of the study is to evaluate pharyngeal airway dimensions and hyoid bone position according to different Class II malocclusion types in Turkish population. Materials and Methods: The retrospective clinical study consisted of patients divided into 3 subgroups with skeletal Class II malocclusion. A total of 221 individuals (131 females and 90 males) were included in the study. Individuals with skeletal Class II malocclusion were divided into three subgroups as maxillary prognathia, mandibular retrognathia and combined. In the cephalometric analysis; 8 nasopharyngeal, 7 oropharyngeal, 2 hypopharyngeal, 9 hyoid measurements and 4 area measurements were used. The distribution of sex and growth-development stages of the patients were compared with the Pearson chi-square test. One-way ANOVA was used to evaluate patients. Tukey Post-Hoc tests were used for bilateral comparisons for significant parameters. SPSS package program was used for data analysis. Results were considered statistically significant at p<0.05 significance level. Results: According to findings, there was no significant difference between the groups in nasopharyngeal airway and area measurements (p>0.05). When the position of the hyoid bone was evaluated, a statistically significant difference was found between the three groups in the measurements of Hy-Pg (mm) (p<0.05). Conclusion: Linear and areal nasopharyngeal airway dimensions are similar in subgroups of Class II malocclusions, while the distance of the hyoid bone from the pogonion is less in the mandibular retrognathia group.

scholarly journals Assessment and Comparison of Oropharyngeal Airway Dimensions in Skeletal Class II Cases Treated With Forsus FRD and Twin Block Appliances

2017 ◽  
Vol 07 (02) ◽  
pp. 008-018
Author(s):  
Kaushik Shetty ◽  
Saidath K. ◽  
Akhil Shetty ◽  
M. S. Ravi ◽  
Keerthan Shashidhar ◽  
...  
Keyword(s):  
Class Ii ◽  
T Test ◽  
Post Treatment ◽  
Twin Block ◽  
Skeletal Class ◽  
Oropharyngeal Airway ◽  
Skeletal Class Ii ◽  
Lateral Cephalograms ◽  
Pre Treatment ◽  
Group 2

Abstract Aims: To assess the changes in the oropharyngeal airway (OAW) dimensions in individuals with retrognathic mandible treated with Forsus FRD and Twin Block appliance to correct the skeletal Class II mal relationship. Methodology: 40 individuals, with Class II skeletal pattern were selected as per inclusion criteria. Pre-treatment lateral cephalograms and hand wrist radiographs were obtained and analyzed. Group 1 with 20 individuals were treated with Forsus FRD and Group 2 with 20 individuals were treated with conventional Twin Block Appliance. Post treatment records were taken after the Class I molar relationship had been obtained. Pre and post treatment cephalograms were compared and analyzed. The data obtained was statistically evaluated using paired t test and unpaired t test. Results: On comparison of pre-treatment and post-treatment cephalograms, increase in Oropharyngeal Airway (OAW) measurements, such as Superior posterior airway space (SPAS), Middle airway space (MAS) and Inferior airway space (IAS) was very highly significant. Conclusion: Our results suggest the existence of a relationship between functional-orthopaedic treatment and increases in OAW dimensions in skeletal Class II growing subjects.

Comparative Analysis of Dentoskeletal Changes of the Twin Block Appliance and the AdvanSync2 Appliance in Treatment of Skeletal Class-II Malocclusion in Pakistani Population: A Randomized Clinical Trial

2021 ◽  
Author(s):  
Fareena Ghaffar ◽  
Abdullah Jan ◽  
Obaid Akhtar ◽  
Alaina T. Mughal ◽  
Rooma Shahid ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Randomized Clinical Trial ◽  
Class Ii ◽  
Growth Spurt ◽  
Class Ii Malocclusion ◽  
Twin Block ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Significant Difference ◽  
Functional Appliances

Abstract Objective This study aimed to compare dentoskeletal changes in skeletal class-II malocclusion with removable twin block appliance and fixed AdvanSync2 appliance. Materials and Methods A prospective randomized clinical trial was conducted over a span of 1 year at AFID at Rawalpindi. Thirty patients with skeletal class-II malocclusion, 16 males (53.3%) and 14 females (46.6%), were randomly selected and divided in two equal groups (15 each) to be treated with either fixed functional appliances (FFAs) or with removable functional appliances (RFAs). Out of 30 patients, 15 between cervical vertebral maturation (CVM) stages of 2 and 3 were treated with RFA (twin block appliances) and remaining 15 between CVM stages of 4 and 5 were treated with FFA (AdvanSync2 appliances). Pretreatment (T1) and posttreatment (T2), angular variable, and linear variable were measured to compare the dentoskeletal effects between the two groups. Statitical Analysis Paired sample t-test was used to assess significant difference between variables at T1 (Pre-treatment) and T2 (Post-treatment) stage for both RFA and FFA group. Comparison among the RFA and FFA group was made using non-parametric Mann-Whitney U Test. IBM SPSS version 25.0 was used for evaluation. Results No significant difference was found in angular variables between the RFA and FFA groups (p > 0.05) with the exception of linear variables. Sella-posterior nasal spine (S-PNS) length significantly increased and Jarabak's ratio significantly decreased for FFA group (p = 0.010 and 0.045, respectively), when compared with RFA group. Conclusion Both the appliances, twin block (RFA) and AdvanSync2 (FFA), are effective for correction of skeletal class-II malocclusion. Both the appliances produced similar effects in the sagittal plane but for better vertical control twin block should be the appliance of choice. AdvanSync2 appliance could be preferred over twin block appliance when dentoalveolar and slight retrusive effect on the maxilla is desired especially for individuals in postpubertal growth spurt.

scholarly journals Dentoskeletal Changes in Class II Subjects following Treatment with Twin Block and Herbst Appliance

2018 ◽  
Vol 8 (1) ◽  
pp. 18-21
Author(s):  
Khurram Shahzad ◽  
Javeeria Asif Cheema ◽  
Muhammad Azeem ◽  
Waheed Ul Hamid
Keyword(s):  
Child Health ◽  
Class Ii ◽  
P Value ◽  
Herbst Appliance ◽  
Twin Block ◽  
End Of Treatment ◽  
Significant Difference ◽  
The Mean ◽  
Group 2 ◽  
Group 1

Objective: To compare the mean changes in dentoskeletal parameters in Class II patients treated by Twin Block versus Herbst appliance.Materials & Method: The study was conducted at the Orthodontic Department of Children’s Hospital and Institute of Child Health and de’Montmorency College of Dentistry, Lahore. The study involved 50 patients those were randomized in equal numbers according to lottery method to either Group-1 (Twin block) or Group-2 (Herbst). Mean changes in SNA, SNB and IMPA at the end of treatment was calculated by subtracting Pretreatment measurements (T1) from post treatment measurements (T2). Student t–test was used to compare the mean changes in dentoskeletal parameters in both groups.Result: The comparison showed that the mean difference recorded in SNA values was -1.06±0.62 in Group-1 and -1.28±0.61 in Group-2 (p-Value 0.07), SNB was 2.14±0.70 in Group-1 and 1.22±0.55 in Group-2, (p-Value 0.001) while IMPA was 1.58±0.64 in Group-1 and 4.8±1.31 in Group-2 (p-Value 0.001).Conclusion: There was a significant difference between mean changes in dentoskeletal parameters in Class II patients treated by twin block when compared to Herbst appliance. 

scholarly journals Comparison between Prophylactic versus Therapeutic Doses of Low-Molecular-Weight Heparin in Severely Ill Coronavirus Disease 2019 Patients in Relation to Disease Progression and Outcome

2020 ◽  
Vol 3 (4) ◽  
pp. 162-169
Author(s):  
Ahmed Elmelhat ◽  
Essam Elbourai ◽  
Hany Dewedar ◽  
Taghrid Elgergawi ◽  
Maryam Alkhanbouli ◽  
...  
Keyword(s):  
Therapeutic Dose ◽  
Inflammatory Markers ◽  
Study Groups ◽  
Prophylactic Dose ◽  
Enoxaparin Group ◽  
Significant Difference ◽  
The Mean ◽  
Group 2 ◽  
Therapeutic Doses ◽  
Group 1

<b><i>Introduction:</i></b> The predominant coagulation abnormalities in patients with coronavirus disease 2019 (COVID-19) suggest a hypercoagulable state and are consistent with uncontrolled clinical observations of an increased risk of venous thromboembolism. <b><i>Aim and Objectives:</i></b> To compare the effect of prophylactic versus therapeutic doses of enoxaparin in the treatment of severe cases of COVID-19 infection. <b><i>Materials and Methods:</i></b> This was a retrospective observational study conducted at Latifa hospital, Dubai. Fifty-nine patients enrolled from March to June 2020 and divided into 2 groups: patients who received the prophylactic dose of enoxaparin (group 1) and patients who received the therapeutic dose of enoxaparin (group 2). <b><i>Results:</i></b> The mean age of all cases was 47.2 ± 10.4 years, while the mean weight was 76.4 ± 13.4 kg. Males represented 79.7% of cases. Blood group “O” was the most frequent blood group (40.9%). None of the cases were smokers or using alcohol. Bronchial asthma, lung diseases, diabetes mellitus, hypertension, CKD, cardiac disease, thyroid disease, and immunodeficiency were present in 1.7, 1.7, 39, 27.1, 5.1, 1.7, 5.1, and 1.7% respectively. There was no significant difference between both study groups regarding personal and medical characteristics, except for hypertension where 35.9% of group 2 (therapeutic) cases were hypertensive compared to 10% of group 1 cases (prophylactic). There was a significant difference between both study groups regarding inflammatory markers improvement duration, duration of MV and O<sub>2</sub> support duration, with longer duration among (therapeutic) group 2 cases compared to group 1 cases (prophylactic). There was a highly significant difference between both study groups regarding ICU admission, as 64% of group 1 cases were admitted compared to 25% of group 1 cases. Similarly, 38.5% of group 2 cases needed MV compared to only 10% of group 1 cases, which was statistically significant. There was no significant difference between both groups regarding bleeding tendency and mortality (<i>p</i> value 0.54). <b><i>Conclusion:</i></b> Our results showed that use of prophylactic dose of enoxaparin might have some benefits compared to the therapeutic dose in terms of less duration of ICU and hospital stay, duration of oxygen support, need and duration of MV, and normalization of inflammatory markers. However, there was no significant difference between the 2 regimens regarding the mortality.

scholarly journals Comparison of the Accuracy of Fixture-Level Implant Impression Making with Different Splinting Techniques

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Mehrdad Nateghi ◽  
Ramin Negahdari ◽  
Sahar Molaei ◽  
Ali Barzegar ◽  
Sepideh Bohlouli
Keyword(s):  
Setting Time ◽  
Acrylic Resin ◽  
Study Groups ◽  
Significant Difference ◽  
Group 3 ◽  
The Mean ◽  
Group 2 ◽  
Main Model ◽  
Group 1

Objectives. The impression-taking technique is one of the most critical factors that not only prevents the shrinkage caused by polymerization but also enhances the accuracy of implant impressions. Also, choosing the right time of taking impressions after splinting implants is one of the important criteria that affects the impression-taking technique. Accordingly, the present study aimed to evaluate the accuracy of different splint methods for implant impressions made at different times. Methods. In this in vitro study, a two-piece metallic index was prepared, and the patient’s jaw was simulated by placing self-cured acrylic resin in the lower part of the index. Then, two holes were made in the acrylic resin at a specific distance from each other, and the analogs were placed in these holes. Splinting of impression copings was carried out with autopolymerized acrylic resin (GC Pattern resin LS, GC America Inc., USA), and an open tray impression approach was performed. Thirty-six casts in three groups (n = 12) were fabricated from the acrylic model. After scanning the casts, the impression accuracy was compared between the three study groups by measuring the distance between the outer portions of the scan bodies screw-retained on implant analogs inside the cast using the Exocad software (2015.07 version). Group 1: splinting impression copings with autopolymerized acrylic resin and impression making immediately after the setting time (4 minutes); group 2: splinting and impression procedure after 17 minutes with splint sectioning and reconnection; group 3: splinting and impression procedure after 24 hours with splint sectioning and reconnection. The data were analyzed using SPSS 17 using the Kruskal–Wallis test. Results. The mean distance measured in group 1 was 19.14 ± 0.029 mm, which was significantly lower than the main model. The distances were 19.15 ± 0.039 and 19.159 ± 0.33 mm in groups 2 and 3, respectively. These two groups were not significantly different from the main model. Moreover, the mean distance measured in the three impression techniques was similar. Conclusions. There was no significant difference in the measurements between group 2, group 3, and the main model. Therefore, dentists can make an impression after 17 minutes to reduce chair time.

scholarly journals Perbedaan ukuran sinus maksilaris pada maloklusi kelas I, II, dan III skeletal ditinjau dari radiografi sefalometriThe difference in the maxillary sinus size of skeletal class I, II, and III malocclusions in terms of cephalometric radiographs

2021 ◽  
Vol 33 (1) ◽  
pp. 53
Author(s):  
Brandon Thamran ◽  
Mimi Marina Lubis
Keyword(s):  
Maxillary Sinus ◽  
Class Ii ◽  
Class I ◽  
Class Iii ◽  
Skeletal Class ◽  
Skeletal Malocclusion ◽  
Skeletal Class Ii ◽  
Significant Difference ◽  
Males And Females ◽  
The Mean

Pendahuluan: Ukuran sinus maksilaris dapat dipengaruhi maloklusi skeletal, oleh karena itu pengetahuan dalam perkembangan dan ukuran sinus maksilaris penting dalam diagnosa dan menentukan rencana perawatan kasus maloklusi. Tujuan penelitian untuk menganalisis perbedaan rerata ukuran sinus maksilaris pada maloklusi kelas I, II, dan III skeletal pada laki-laki dan perempuan. Metode: Jenis penelitian Penelitian deskriptif analitik dilakukan pada 96 pasien RSGM USU usia 18-35 tahun dengan Teknik purposive sampling, terdiri dari 27 relasi rahang Kelas I, 31 Kelas II dan 22 Kelas III. Subjek  diperoleh melalui pengukuran metode Steiner. Hasil tracing dipindahkan melalui scanner dan  pengukuran luas Sinus Maksilaris dengan program AutoCAD. Hasil: Rerata sinus maksilaris Kelas I skeletal adalah 1492,18268,44 mm2  untuk laki-laki dan 1614,80259,13 mm2 untuk perempuan p=0,275, maka tidak ada perbedaan signifikan antara rerata sinus maksilaris Kelas I skeletal pada laki-laki dan perempuan, Kelas II skeletal adalah 1879,75 mm2 untuk laki-laki dan 1544,41239,47 mm2 untuk perempuan diperoleh p=0,016, maka terdapat perbedaan signifikan antara rerata  sinus maksilaris Kelas II skeletal pada laki-laki dan perempuan, dan Kelas III skeletal adalah 1619,36 mm2 untuk laki-laki dan 1489,92 mm2 untuk perempuan diperoleh p=0,239, maka tidak ada perbedaan signifikan antara rerata  sinus maksilaris  Kelas III skeletal pada laki-laki dan perempuan. Rerata ukuran antar kelompok didapatkan 1572,93 263,72 mm2  untuk Kelas I skeletal, 1609,32 mm2 untuk Kelas II skeletal, dan 1531,11 mm2 untuk Kelas III skeletal dengan p=0,600, Hasil ini menunjukkan tidak ada perbedaan rerata  sinus maksilaris pada maloklusi Kelas I, Kelas II dan Kelas III skeletal. Simpulan: Tidak ada perbedaan pada rerata ukuran sinus maksilaris pada maloklusi Kelas I, Kelas II dan Kelas III skeletal.Kata kunci: Ukuran sinus maksilaris, maloklusi skeletal, analisa Steiner, radiogram sefalometri. ABSTRACTIntroduction: Maxillary sinus size can be affected by skeletal malocclusion. Therefore knowledge of maxillary sinus development and size is essential in diagnosing and determining the treatment plan for malocclusion cases. This study was aimed to analyse the mean difference in maxillary sinus size in skeletal class I, II, and III malocclusions in males and females. Methods: This type of study was a descriptive-analytic study conducted on 96 patients at Universitas Sumatera Utara Dental Hospital aged 18-35 years with a purposive sampling technique, consisting of 27 Class I, 31 Class II and 22 Class III jaw relations. Subjects were obtained by measuring the Steiner method. The tracing results were transferred through a scanner and measuring the maxillary sinus area using the AutoCAD program. Results: The mean skeletal Class I maxillary sinus was 1492.18268.44 mm2 for men and 1614,80259.13 mm2 for women p = 0.275, so there was no significant difference between the mean skeletal Class I maxillary sinus in males and females. Class II skeletal is 1879.75 mm2 for men and 1544.41239.47 mm2 for women obtained p = 0.016. Hence, there is a significant difference between the mean skeletal Class II maxillary sinus in males and females, and skeletal Class III is 1619.36 mm2 for men and 1489.92 mm2 for women obtained p = 0.239, so there was no significant difference between the mean skeletal Class III maxillary sinus in males and females. The mean size between groups was 1572.93 263.72 mm2 for skeletal Class I, 1609.32 mm2 for skeletal Class II, and 1531.11 mm2 for skeletal Class III with p = 0.600. skeletal Class I, Class II and Class III malocclusions. Conclusion: There was no difference in mean maxillary sinus size in skeletal Class I, Class II and Class III malocclusions.Keywords: Maxillary sinus size, skeletal malocclusion, Steiner analysis, cephalometric radiograph.

scholarly journals Steering the Mandible in the Right Direction : Forsus Case Series

2021 ◽  
pp. 030157422110054
Author(s):  
Prachi Gohil ◽  
Sonali Mahadevi ◽  
Bhavya Trivedi ◽  
Neha Assudani ◽  
Arth Patel ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Case Series ◽  
Treatment Compliance ◽  
Class Ii ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Technological Advances ◽  
Functional Appliances ◽  
The Right ◽  
Mandibular Retrognathia

We are in the process of discovery of new vistas for technological advances in terms of various appliances with a vision of making orthodontic treatment compliance free as well as successful. Due to improved technology, the enigma of treating the Class II syndrome is palliated. “Out of the box” thinking has become a norm to treat certain situations that were not corrected in noncompliant patients. Fixed functional appliances are valuable tools introduced to assist the correction of skeletal Class II malocclusion with mandibular retrognathia at the deceleration stage of growth for achieving stable results. In this direction a case series is reported of patients having the above conditions and undergoing orthodontic treatment using a Forsus FFA. Joining hands with technology is a win-win situation for both the patient and the orthodontist.

scholarly journals Repair Integrity and Functional Outcomes Between Knot-Tying and Knotless Suture-Bridge Arthroscopic Rotator Cuff Repair: A Prospective Randomized Clinical Trial

2021 ◽  
Vol 9 (4) ◽  
pp. 232596712110024
Author(s):  
Koray Şahin ◽  
Fatih Şentürk ◽  
Mehmet Ersin ◽  
Ufuk Arzu ◽  
Mechmet Chodza ◽  
...  
Keyword(s):  
Rotator Cuff ◽  
Constant Score ◽  
Knot Tying ◽  
Suture Bridge ◽  
Significant Difference ◽  
The Mean ◽  
Group 2 ◽  
Cuff Repair ◽  
Group 1

Background: Knot-tying suture-bridge (SB) rotator cuff repair may compromise the vascularity of the repaired tendon, causing tendon strangulation and medial repair failure. The knotless SB repair technique has been proposed to overcome this possibility and decrease retear rates. Purpose: To compare clinical and structural outcomes and retear patterns between the knot-tying and knotless SB techniques. We hypothesized that the knotless technique would result in lower retear rates owing to the preservation of intratendinous vascularity. Study Design: Randomized controlled trial; Level of evidence, 1. Methods: A total of 104 patients with full-thickness rotator cuff tears were randomly and prospectively allocated to undergo knot-tying (group 1) or knotless (group 2) SB repair. Clinical outcome measures included range of motion, the visual analog scale (VAS) for pain, and the Constant score for function. Repair integrity was evaluated on magnetic resonance imaging scans using the Sugaya classification. Retears were also classified according to their pattern as type 1 (lateral) or type 2 (medial). Results: Overall, 88 patients (group 1: n = 42 [mean ± SD age, 54.3 ± 9.8 years]; group 2: n = 46 [mean ± SD age, 55.8 ± 8.2 years]) were included in the final analysis. The mean ± SD follow-up period was 25.4 ± 8.3 and 23.3 ± 7.2 months for groups 1 and 2, respectively. From preoperatively to postoperatively, the mean VAS pain score improved significantly in both groups (group 1: from 7.4 ± 1.7 to 1.0 ± 1.7; group 2: from 7.1 ± 1.9 to 1.3 ± 2.0; P < .0001 for both), as did the mean ± SD Constant score (group 1: from 51.7 ± 13.4 to 86.0 ± 11.5; group 2: from 49.4 ± 18.4 to 87.2 ± 14.8; P < .0001 for both). There was no significant difference between the groups for the postoperative VAS or Constant score. The retear rate was not significantly different between the groups (19.0% [8/42] in group 1 and 28.3% [13/46] in group 2; P > .05). There was a significant difference in the type 2 failure rate (75.0% [6/8] in group 1 and 23.1% [3/13] in group 2; P = .03). Conclusion: Both techniques showed excellent improvement and comparable clinical outcomes, and there was no significant difference in retear rates. Consistent with previously published data, the type 2 failure rate was significantly higher with the knot-tying technique. Registration: NCT03982108 ( ClinicalTrials.gov identifier).

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