Comparing occlusal contact quality after aligner and fixed appliance treatment using computerized occlusal analysis during 6 months of retention

2021 ◽  
Author(s):  
Julia Cohen-Lévy ◽  
Colette Boulos ◽  
Pierre Rompré ◽  
Andrée Montpetit ◽  
Robert Barry Kerstein
Keyword(s):  
Treatment Completion ◽  
Quality Parameter ◽  
Contact Ratio ◽  
Fixed Appliance ◽  
Occlusal Contact ◽  
Occlusion Time ◽  
Orthodontic Patients ◽  
Fixed Appliances ◽  
Analysis System ◽  
The Right

Abstract Objective Less than ideal contacts have been reported following aligner therapy, which is believed will resolve with settling, despite settling improving occlusal balance has not been scientifically confirmed. The aim of this study was to compare the outcome quality of occlusal contacts in patients treated with fixed appliances or clear aligners. Methods 39 orthodontic patients (14 treated with aligners; 25 with fixed appliances) were evaluated with a digital occlusal analysis system (T-scan10 ™), assessing Maximum Intercuspation contact simultaneity, symmetry, and relative force distribution. The Occlusion Time, the Right/Left force percentage (%R/L), the Anterior/Posterior contact ratio (RAP), and the anteroposterior Center of Force (COF) locations were recorded at treatment completion, and 3 and 6 months after. Results No significant differences in measured occlusal contact quality parameter were found between groups at treatment completion or follow-up (OT, %R, RAP nor COF position). The COF moved posteriorly and remained stable after 3 months, near to the first molar, but was located more anterior in females (p= 0.01). 10 patients finished treatment with marked asymmetry, (%R/L > 50±10%), especially in the fixed appliance group (9/25 =3 6%) versus the aligner group (1/14 = 7%). 1/3 of all patients (both groups combined) after 6 months retention had %R/L imbalances > 50±10%. Conclusions Occlusal contacts were comparable at completion of treatment with aligners or brackets and after 3-6 months of retention. Contacts increased in the posterior region with time, but settling did not improve marked asymmetry in all patients.

Changes in the Complexity of Orthodontic Treatment for Patients Referred to a Teaching Hospital

1988 ◽  
Vol 15 (1) ◽  
pp. 27-32 ◽  
Author(s):  
C. D. Stephens ◽  
N. W. Harradine
Keyword(s):  
General Practitioner ◽  
Orthognathic Surgery ◽  
Orthodontic Treatment ◽  
Further Training ◽  
Fixed Appliance ◽  
Dental Hospital ◽  
Orthodontic Patients ◽  
Specialist Treatment ◽  
Fixed Appliances ◽  
Removable Appliance

The records of 200 orthodontic patients accepted for treatment by the Orthodontic Department of the Bristol Dental Hospital in 1977 were compared with 200 taken on in 1985 in order to determine whether there had been any change in the proportion of referred cases requiring more complex procedures. Within each sample, cases were categorized as follows: (a) suitable for removable appliance treatment by an undergraduate or general practitioner; (b) requiring simple one arch fixed appliance treatment such as might he attempted by a general practitioner after a period of further training; (c) needing specialist treatment such as full multibracketed fixed appliances or orthognathic surgery. It was found that there had been no change in the proportions of simple and complex cases referred during the 8-year period although the proportion of patients now receiving complex treatment had increased greatly. Possible explanations and implications are discussed.

scholarly journals Quality of life in an adolescent orthodontic population: Invisalign versus fixed appliances

2021 ◽  
Author(s):  
Richa Sharma ◽  
Robert Drummond ◽  
William Wiltshire ◽  
Robert Schroth ◽  
Milos Lekic ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Short Form ◽  
Health Impact ◽  
Fixed Appliance ◽  
Treatment Groups ◽  
Significant Difference ◽  
Orthodontic Patients ◽  
Fixed Appliances ◽  
Domain Scores

ABSTRACT Objectives To investigate adolescent orthodontic patient experiences and quality of life with fixed appliances compared to Invisalign. Materials and Methods Adolescent patients in active treatment with Invisalign or fixed appliances for a minimum of 6 months were provided with the Child Oral Health Impact Profile-Short Form 19 questionnaire, along with additional items of interest that were assessed separately. Pearson's χ2 test was used to compare responses (P < .05), and unpaired t-tests (P < .05) were used to test for differences in mean satisfaction, quality of life, and domain scores. Results In total, 74 patients (37 in each treatment group) participated. Overall, no significant differences were noted in the mean quality of life, satisfaction, or domain scores between the two groups. A significant difference was noted in the time taken to adjust to appliances, with the Invisalign group demonstrating faster adaptation. Additionally, the fixed appliance group was 3.8 times more likely to report missing school because of their appliance (95% confidence interval [CI]: 1.2, 12.5) and 2.7 times more likely to report having difficulty eating certain foods (95% CI: 1.1, 7.1). When the sample of females between the ages of 14 and 18 was analyzed, the Invisalign group reported feeling attractive more often than the fixed appliance group. Conclusions Both treatment groups were generally very satisfied with their treatment modality. The overall quality of life of adolescent orthodontic patients undergoing treatment with fixed appliances and Invisalign for a minimum of 6 months was similar.

Microbiological Changes and Caries-Preventive Effect of an Innovative Varnish Containing Chlorhexidine in Orthodontic Patients

2018 ◽  
Vol 52 (4) ◽  
pp. 272-278 ◽  
Author(s):  
Lídia Lipták ◽  
Krisztina Szabó ◽  
Gábor Nagy ◽  
Sándor Márton ◽  
Melinda Madléna
Keyword(s):  
Dental Arch ◽  
Risk Category ◽  
Orthodontic Appliances ◽  
White Spot Lesions ◽  
Preventive Effect ◽  
Fixed Appliance ◽  
Fixed Orthodontic Appliances ◽  
Orthodontic Patients ◽  
The Mean ◽  
The Right

The aim of this study was to investigate the effects of Cervitec Plus® on the level of mutans streptococcus (SM) and lactobacillus (LB) colonies and the development of white spot lesions (WSLs) in patients with fixed orthodontic appliances. Informed consent was obtained from 32 volunteers (age 16.5 ± 2.75 years). At baseline, levels of the bacterial colonies were determined in saliva and plaque using a chairside test (CRT Bacteria, Ivoclar-Vivadent, Schaan, Liechtenstein), and the number of WSLs was registered. After placing the fixed appliance, Cervitec Plus® or placebo varnishes (Ivoclar-Vivadent, Schaan, Liechtenstein) were applied monthly around the brackets and tubes, randomly in the right or left (test and placebo) quadrants of the same dental arch. SM and LB colonies in saliva and the SM colonies in plaque were determined on 11–21, 13–23, 15–25, and 16–26 teeth monthly over a 6-month period. At the sixth month, the number of new WSLs was determined. By the end of the study, compared with baseline, the ratio of saliva samples belonging to the low-risk category was significantly higher (p ≤ 0.01) from the 2nd month regarding the SM (76 vs. 52%) and LB (69 vs. 52%); reduction of SM in plaque was significantly greater on the test than placebo sides (6.69 ± 1.71 and 4.45 ± 1.60, respectively; p ≤ 0.01). The mean number of new WSLs was significantly lower in the test (0.06 ± 1.60) than in the placebo quadrants (1.13 ± 1.50, p ≤ 0.01). Conclusion: Monthly use of Cervitec Plus® could result in a significant improvement in oral health of orthodontic patients.

scholarly journals Changes in subgingival microflora after placement and removal of fixed orthodontic appliances

2014 ◽  
Vol 142 (5-6) ◽  
pp. 301-305 ◽  
Author(s):  
Marija Zivkovic-Sandic ◽  
Branka Popovic ◽  
Jelena Carkic ◽  
Nadja Nikolic ◽  
Branislav Glisic
Keyword(s):  
Statistical Significance ◽  
Orthodontic Appliances ◽  
Fixed Orthodontic Appliances ◽  
Orthodontic Patients ◽  
Group A ◽  
Subgingival Microflora ◽  
Fixed Appliances ◽  
Pcr Method ◽  
Group B ◽  
The Right

Introduction. The placement of fixed orthodontic appliances may lead to increased plaque accumulation and changes in subgingival microflora. Objective. The aim of this study was to examine the changes in frequency of subgingival microflora that occur after placement and removal of fixed orthodontic appliance using polymerase chain reaction (PCR). Methods. This study included 33 orthodontic patients, who were divided into two groups. Subgingival plaque samples were collected from the right upper incisor (U1) and right upper first molar (U6). In group A, the samples were taken three times: before placement appliance (T1), after one month (T2), and after 3 months (T3). In group B the samples were also taken three times: before appliance removal (T1), after one month (T2), and after three months (T3). PCR method was used to determine the presence of P. gingivalis, A. actinomycetemcomitans, T. forsythia, and P. intermedia. Results. In group A the frequency of P. gingivalis showed statistically significant decrease at U1 (p=0.049) and U6 (p=0.008), from T1 to T2, and at U1 (p=0.048) from T1 to T3. In group B only the frequency of T. forsythia showed a statistically significant decrease, at U6 (T1 vs. T2, p=0.004; T1 vs. T3, p=0.0003). Regarding other analyzed bacteria, changes in the presence were noticed but no statistical significance was found. Conclusion. Placement of fixed appliances may have an impact on subgingival microflora, but in the first months after the placement and removal of the appliance changes were not significant, probably due to good oral hygiene.

scholarly journals Perawatan Maloklusi Angle Kelas I disertai Impaksi Kaninus Maksila Menggunakan Alat Cekat Begg

2014 ◽  
Vol 21 (2) ◽  
pp. 184
Author(s):  
Darmayanti Dian Suryani ◽  
Sri Suparwitri ◽  
Soekarsono Hardjono
Keyword(s):  
Current Treatment ◽  
Class I ◽  
Dental Arch ◽  
Maxillary Canine ◽  
Orthodontic Bracket ◽  
Fixed Appliance ◽  
Angle Class ◽  
Hereditary Factors ◽  
Fixed Appliances ◽  
The Right

Gigi kaninus sangat penting untuk estetika dan fungsi mastikasi seseorang. Impaksi gigi adalah gagalnya gigi untuk muncul ke dalam lengkung gigi yang dapat disebabkan karena kekurangan ruang, adanya sesuatu yang menghalangi jalur erupsi gigi atau karena faktor keturunan. Prevalensi impaks gigi kaninus maksila adalah 0,9-2,2%, sedangkan impaksi gigi kaninus mandibula lebih jarang terjadi. Alternatif perawatan gigi impaksi kaninus maksila adalah operasi exposure dan diikuti dengan kekuatan ortodontik untuk membantu erupsi dengan alat cekat ortodontik. Tujuan dari perawatan adalah untuk koreksi malrelasi dan malposisi gigi geligi, khususnya koreksi gigi kaninus impaksi menggunakan teknik Begg. Pasien laki-laki, 19 tahun, gigi sangat berjejal, gigi kaninus kanan kiri rahang atas dan gigi kaninus kanan rahang bawah impaksi, kelas I, deep overbite, overjet 3 mm dan overbite 8,8 mm. Perawatan dilakukan dengan menggunakan alat cekat Begg dengan tanpa pencabutan. Operasi exposure dilakukan untuk membuka gigi kaninus kanan kiri atas yang impaksi yang diikuti perekatan braket ortodontik. Kawat busur multiloop, anchorage bend dan elastik intermaksiler klas II digunakan pada tahap leveling dan unraveling. Dalam waktu 14 bulan,overbite terkoreksi, gigi kaninus kanan kiri atas sudah erupsi, overjet 3,00 mm, overbite 3,00 mm. Saat ini perawatan masih berlangsung pada tahap leveling dan unraveling untuk koreksi kaninus yang impaksi. Perawatan maloklusi angle klas I dengan berjejal dan impaksi kaninus maksila dapat dilakukan dengan operasi exposure gigi kaninus impaksi diikuti alat cekat Begg. Orthodontic Treatment of Class I Malocclussion with Canine Impaction Using Begg Fixed Appliance. Canine is very important for aesthetic and masticatory function. Impaction refers to a failure of tooth to presence into the dental arch, usually due to either space deficiencies, the presence of an entity blocking the path of tooth eruption or due to hereditary factors. Prevalence of maxillary canines impaction is 0.9 to 2.2%, while the mandibular canine impaction is less common. Alternative dental care is impacted maxillary canine exposure surgery and followed by orthodontic force for help the eruption with fixed orthodontic appliance. The goal of treatment is to correct malrelation and malposition of teeth. Patient man, 19 years old, very crowded teeth, maxillary right and left canine and mandibular right canine impaction, Angle Class I, deep overbite, 3 mm overjet and overbite 8,8 mm. Treatments performed using Begg fixed appliances without extraction. Exposure surgery is done under the right and left maxillary canine impaction followed orthodontic bracket bonding. Multiloop arch wire, bend and elastic anchorage intermaksiler class II used at the stage of leveling and unraveling. Within 14 months, overbite was corrected, maxillaryr right and left canine eruption, Angle Class I canine relationship, 3.00 mm overjet, 3,00 mm overbite. Current treatment is still ongoing at leveling and unraveling stage. Treatment angle malocclusion class I with maxillary canine impaction can be done by exposure surgery followed by Begg fixed appliances.

Orthodontic Monitoring and Case Finishing With the T-Scan System

2020 ◽  
pp. 1057-1124
Author(s):  
Julia Cohen-Levy, DDS
Keyword(s):  
Orthodontic Treatment ◽  
Tooth Movement ◽  
Treatment Plan ◽  
Force Distribution ◽  
Occlusal Force ◽  
Fixed Appliance ◽  
Occlusal Contact ◽  
Occlusion Time ◽  
Scan Data ◽  
Occlusal Contact Pattern

This chapter reviews T-Scan use in orthodontics from diagnosis to case finishing, and then in retention, while defining normal T-Scan recording parameters for orthodontically-treated subjects versus untreated subjects. T-Scan use in the case-finishing process is also described, which compensates for changes in the occlusion that occur during “post-orthodontic settling,” as teeth move freely within the periodontium to find an equilibrium position when the orthodontic appliances have been removed. T-Scan implementation is necessary because, often, despite there being a post treatment, visually “perfect” angle's Class I relationship established with the orthodontic treatment, ideal occlusal contacts do not result solely from tooth movement. Creating simultaneous and equal force occlusal contacts following fixed appliance removal can be accomplished using T-Scan data to optimize the end-result occlusal contact pattern. The T-Scan software's force distribution and timing indicators (the two- and three-dimensional force views, force percentage per tooth and arch half, the center of force trajectory and icon, the occlusion time [OT], and the disclusion time [DT]), all aid the Orthodontist in obtaining an ideal occlusal force distribution during case-finishing. Fortunately, most orthodontic cases remain asymptomatic during and after tooth movement. However, an occlusal force imbalance or patient discomfort may occur along with the malocclusion that needs orthodontic treatment. Symptomatic cases require special documentation at the baseline, and careful monitoring throughout the entire orthodontic process. The clinical use of T-Scan in these “fragile” cases of patient muscle in-coordination, mandibular deviation, atypical pain, and/or TMJ idiopathic arthritis, are illustrated by several case reports. The presented clinical examples highlight combining T-Scan data recorded during case diagnosis, tooth movement, and in case finishing, with patients that underwent lingual orthodontics and orthognathic surgery, orthodontic treatment using clear aligners, or conventional fixed treatment with a camouflage treatment plan, which require special occlusal finishing (when premolars are extracted in only one arch).

The Relationship between Consistency of Propulsive Cycles and Maximum Angular Velocity during Wheelchair Racing

2008 ◽  
Vol 24 (3) ◽  
pp. 280-287 ◽  
Author(s):  
Yong “Tai” Wang ◽  
Konstantinos Dino Vrongistinos ◽  
Dali Xu
Keyword(s):  
Angular Velocity ◽  
Upper Limb ◽  
Wheelchair Propulsion ◽  
Upper Arm ◽  
Wheelchair Athletes ◽  
Angular Velocities ◽  
Limb Kinematics ◽  
Analysis System ◽  
The Right ◽  
The Relationship

The purposes of this study were to examine the consistency of wheelchair athletes’ upper-limb kinematics in consecutive propulsive cycles and to investigate the relationship between the maximum angular velocities of the upper arm and forearm and the consistency of the upper-limb kinematical pattern. Eleven elite international wheelchair racers propelled their own chairs on a roller while performing maximum speeds during wheelchair propulsion. A Qualisys motion analysis system was used to film the wheelchair propulsive cycles. Six reflective markers placed on the right shoulder, elbow, wrist joints, metacarpal, wheel axis, and wheel were automatically digitized. The deviations in cycle time, upper-arm and forearm angles, and angular velocities among these propulsive cycles were analyzed. The results demonstrated that in the consecutive cycles of wheelchair propulsion the increased maximum angular velocity may lead to increased variability in the upper-limb angular kinematics. It is speculated that this increased variability may be important for the distribution of load on different upper-extremity muscles to avoid the fatigue during wheelchair racing.

scholarly journals Appropriate Oral Hygiene Motivation Method for Patients with Fixed Appliances

2007 ◽  
Vol 77 (6) ◽  
pp. 1085-1089 ◽  
Author(s):  
Zuhal Yetkin Ay ◽  
Mözgür Sayın ◽  
Yener Özat ◽  
Tuba Goster ◽  
A. Onur Atilla ◽  
...  
Keyword(s):  
Oral Hygiene ◽  
The Other ◽  
Plaque Index ◽  
Gingival Index ◽  
Verbal Information ◽  
Bleeding On Probing ◽  
Orthodontic Patients ◽  
Fixed Appliances ◽  
The Difference

Abstract Objective: To determine the most appropriate oral hygiene motivation method (OHMM) for orthodontic patients with fixed appliances. Materials and Methods: A total of 150 orthodontic patients, scheduled for their regular controls, were included in this study. The patients were divided into five groups (n = 30) according to the verbal OHMM and instructed as follows: only verbal information (V), verbal information with demonstration on model (M), verbal information with demonstration on model and self application by the patient (M+A), verbal information using the illustration catalog (I), and verbal information using the illustration catalog and self application by the patient (I+A). All of the applications of the patients were made under the supervision of the clinicians. The periodontal parameters (plaque index [PI], gingival index [GI], and bleeding on probing [BOP]) were recorded at the baseline (before the instructions of the OHMM), 1 week later, and 4 weeks after the OHMM. Results: All periodontal parameters showed significant decreases after 4 weeks in all OHMM groups (P < .05). I+A group has significantly lower PI scores and BOP percentages than the other groups (P < .05) after 4 weeks. The difference between the V group and M+A, I, and I+A groups in the GI scores were significant (P < .05), and the I+A group has presented the lowest GI score. Conclusions: The OHMM applied by the patients under the supervision of the clinician seemed to be more successful in the elimination of plaque and inflammatory symptoms in patients with fixed appliances.

scholarly journals The Relationship between Palatal Displacement of Upper Canines and Incisors Widths in a Syrian Sample of Patients with Uncrowded Arches

2015 ◽  
Vol 16 (11) ◽  
pp. 873-875 ◽  
Author(s):  
Luai Mahaini
Keyword(s):  
Orthodontic Treatment ◽  
Matched Control ◽  
Control Sample ◽  
Tooth Size ◽  
Orthodontic Patients ◽  
Treatment Plans ◽  
The Right ◽  
The Relationship ◽  
Mandibular Incisors ◽  
Dental Casts

ABSTRACT The aim of this study investigates mesiodistal crown size of the maxillary and mandibular incisors of patients with palatally impacted canines (PDC). Pretreatment dental casts of orthodontic patients with PDC of one or both maxillary canines (N: 33) were collected. This PDC sample was matched according to age and sex with pretreatment dental casts from unaffected orthodontic patients. For the PDC and matched control samples, maximum mesiodistal crown diameters were recorded for the four incisors on the right side only. The results showed that, on average, the mesiodistal crown diameters for the maxillary and mandibular incisors measured smaller in the PDC sample than in the control sample. These findings of statistically significant tooth-size reductions associated with PDC occurrence indicate a generalized pattern of reduced tooth size as a characteristic associated with the PDC anomaly. Further, the presence of generalized tooth-size reduction in cases with palatally displaced canines help explain why most orthodontic treatment plans for PDC patients are of the nonextraction type. How to cite this article Mahaini L. The Relationship between Palatal Displacement of Upper Canines and Incisors Widths in a Syrian Sample of Patients with Uncrowded Arches. J Contemp Dent Pract 2015;16(11):873-875

scholarly journals GINGIVAL THICKNESS ASSESSMENT AT MANDIBULAR INCISORS OF ORTHODONTIC PATIENTS WITH ULTRASOUND AND CONE-BEAM CT.  A CROSS-SECTIONAL STUDY

2019 ◽  
Author(s):  
Dimitrios Kloukos ◽  
Lydia Kakali ◽  
George Koukos ◽  
Anton Sculean ◽  
Andreas Stavropoulos ◽  
...  
Keyword(s):  
Cone Beam ◽  
Point Estimate ◽  
Central Incisor ◽  
Cross Sectional ◽  
Gingival Thickness ◽  
Significant Difference ◽  
Orthodontic Patients ◽  
Clinically Significant ◽  
The Right ◽  
Mandibular Incisors

Abstract Background Quantitative and qualitative analysis of several periodontal parameters plays an important role in several dental procedures. Aim of the current study was to assess gingival thickness (GT) at mandibular incisors of orthodontic patients with two methods and determine how these methods are compared to each other when assessing periodontal anatomy through soft tissue thickness.Methods The sample consisted of 40 consecutive adult orthodontic patients. GT was measured at both central mandibular incisors, mid-facially on the buccal aspect, 2mm apically to the free gingival margin with two methods: a) clinically with an Ultrasound device (USD) and b) radiographically with Cone Beam Computed Tomography (CBCT).Results CBCT measurements were consistently higher than USD measurements, with the difference ranging from 0.13 mm to 0.21 mm. No difference was noted between the repeated CBCT measurements at the right central incisor (Bias= 0.05 mm; 95% CI= -0.01, 0.11, p=0.104). Although the respective results for the left incisor indicated, statistically, that the measurements were not exactly replicated, the magnitude of the point estimate was small and not clinically significant (Bias= 0.06 mm; 95% CI= 0.01, 0.11, p=0.014). Small differences between CBCT measurements made by the 2 examiners at the left central incisor (bias= 0.06 mm, 95% CI= 0.01, 0.11, p=0.014) were detected. However, this difference was minor, and again, not clinically significant. The respective analysis on the right incisor showed no significant difference (bias= 0.05 mm, 95% CI= -0.01, 0.11, p=0.246).Conclusions Present data indicate that CBCT measurements were highly reproducible and yielded greater values compared to USD measurements.

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