Evaluation Of Orthodontic Treatment Research Articles

Precision and accuracy of craniofacial growth and orthodontic treatment evaluation by digital image correlation: a prospective cohort study.

A precise and accurate method for structural superimposition is essential for analyzing dentofacial growth and orthodontic or surgical treatment in longitudinal studies. The errors associated with different superimposition methods have not yet been assessed in high-quality studies. This study aimed to assess the precision and accuracy of digital image correlation (DIC) for structural superimposition. Two cephalometric images from 30 consecutive patients were superimposed using three DIC methods, each measured twice by two examiners. Areas including the contours of the sella, the whole cranial base (CB), and Walker's point and lamina cribrosa (WPLC) were compared using a random coefficient model. Inter-rater and intra-rater errors were assessed for each method. WPLC provided the best precision for image rotation and cephalometric landmarks. Systematic bias was observed between the WPLC and CB methods for image rotation and most landmarks. The intra-rater error in image rotation during DIC was strongly correlated with the intra-rater error in the landmarks of the anterior nasal spine, articulare, and pogonion. Structural superimposition using DIC with WPLC is a precise method for analyzing dentofacial growth and orthodontic or surgical treatment. Moreover, the best method is the measurement of longitudinal dental and craniofacial changes on structurally superimposed cephalometric radiographs with WPLC and a reference grid including the true vertical and horizontal lines from Walker's point.

Evaluation of Orthodontic Treatment Needs among Widou Schoolchildren in Ferlo (SENEGAL): A Transversal Study

The aim of this study was to evaluate orthodontic treatment needs among Ferlo scholars. The design of the study was descriptive and transversal. For Inclusion criteria, children must live in Widou or live around Widou’s school at least 6 km, be students at primary school of Widou Thiengoly, have a general health state which permits a clinical oral examination and teacher’s and/or parent’s agreement. The investigation was exhaustive and concerned the only school of the locality. More of 4/5 schoolchildren was 10.25 years ± 2.15 old. The majority (83.74%) of children presented an overjet between 0 and 3.5 mm, 1.63% presented a crossbite and 15.45% had OIM and RC different over to 2 mm. More of 30% of schoolchildren presented an overbite between 1 and 2 mm. More of 1/10 of them had an aesthetic teeth perception classified levels 8.9 and 10 corresponding to an orthodontic treatment needed according to IOTN while 20.33% had a score of 4 and 3.25% recorded score of 5 corresponding to a high treatment needed according to IOTN. The results of this study reveal that people need to be informed better about the therapeutic possibilities that orthodontics offer.

Study on pseudo quantitative evaluation of orthodontic treatment

Study on pseudo quantitative evaluation of orthodontic treatment

Evaluation of orthodontic treatment needs in school going children of south western Maharashtra population using aesthetic component of iotn index

Evaluation of orthodontic treatment needs in school going children of south western Maharashtra population using aesthetic component of iotn index - IJODR- Print ISSN No: - 2581-9356 Online ISSN No:- 2581-9364 Article DOI No:- 10.18231/j.ijodr.2019.007, IP Indian Journal of Orthodontics and Dentofacial Research-IP Indi

Evaluation of Orthodontic Treatment Needs Using the Dental Aesthetic Index in Iranian Students

BackgroundIn the contemporary orthodontics, the number of people who demand orthodontic treatment to improve their psychosocial issues related to facial esthetic is constantly increasing. Even in treatment plans, appearance and esthetic gain more attention.ObjectivesThe purpose of this study was to determine the need for orthodontic treatment on the basis of the dental aesthetic index (DAI) in the Iranian students of Ahvaz city.Material and MethodsThis cross sectional study was performed on 900 students aged between 11 - 14 years (450 boys, 450 girls). Schools were selected based on random cluster sampling from different parts of the city. Students\\ who had or were having orthodontic treatment including those on interceptive orthodontics, were excluded from the study. Two questionnaires were used; the first one included different DAI criteria, and the second one included two questions about orthodontic treatment need and satisfaction of personal dental appearance. The results were analyzed by Chi-Square and T test.ResultsIn 70.9% of the students, DAI score was 13 - 25, 19.2% of the samples had a DAI score of 26 - 30, the DAI score of 7.8% was 31 - 35, and in 2.1% the DAI score was greater than 35. The association between the DAI score and sex was not statistically significant (P = 0.778). In relation to orthodontic treatment need, 44.8% of students answered positively, while in 55.2% the answer was negative. In relation to satisfaction with appearance, 21% of the students were satisfied with their appearance, 59% were relatively satisfied, and 19.9% were not satisfied with their appearance. The association between DAI score and the need for orthodontic treatment and satisfaction of dental appearance was significant (P = 0.000).ConclusionIn comparison to other studies, the students in Iran (Ahvaz) have a better dental appearance and less need for orthodontic treatment. Significantly positive correlations were found between the DAI and satisfaction of dental appearance, orthodontic treatment need and student’s perception.

Facial Photographs and Study Models in Assessment of Orthodontic Treatment Needs: A Comparative Study

Aim: The purpose of the study was to compare and evaluate the examiner differences when assessing orthodontic treatment needs using facial photographs and study models. Materials and methods: Thirty subjects (9 males, 21 females) who displayed a definite, severe or very severe malocclusion as per dental esthetic index scores were considered for the study. The diagnostic study models and facial photographs were assessed for each patient by two consulting orthodontists and one postgraduate orthodontic student. Visual analog scale (VAS) was used to assess. Separate assessment was made from study models and facial photographs by two orthodontists and one postgraduate student. The orthodontic treatment needs were higher from study models compared with facial photographs (p < 0.001) for all the three examiners. Results: A considerable variation in the intraexaminer and interexaminer consistency from the assessment of orthodontic treatment needs from facial photographs was shown. There were higher for orthodontic treatment needs from study models than facial photographs. Reduced intraexaminer and interexaminer variability from assessment of orthodontic treatment needs from facial photographs may suggest a specific method to achieve a more uniform evaluation of orthodontic treatment needs.

Residents’ journal review

Residents’ journal review

Evaluation of orthodontic treatment after 1 year of retention--a randomized controlled trial

The aim of this study was to use a randomized controlled trial methodology to evaluate and compare three different retention methods. The capacity of the retention methods to retain orthodontic treatment results was in this first phase analysed on a short-term basis, i.e. after 1 year of retention. The subjects were recruited from adolescents undergoing fixed appliance treatment at an orthodontic clinic in the National Health Service (NHS) in Sweden between 2001 and 2007. Seventy-five patients (45 girls and 30 boys with a mean age of 14.4 years at the start of retention) were randomized into three retention systems; a vacuum-formed retainer in the maxilla and bonded canine-to-canine retainer in the mandible (group V-CTC), a vacuum-formed retainer in the maxilla combined with stripping of the 10 proximal surfaces of the lower mandibular anterior teeth (group V-S), and a prefabricated positioner covering the teeth in the maxilla and mandible (group P). The main outcome measures were: Little's irregularity index (LII), intercanine and intermolar width, arch length, overjet, and overbite. Registrations were made before orthodontic treatment, when the fixed orthodontic appliance was removed, and after 12 months in retention. Differences in means between groups were tested by one-way analysis of variance. After 1 year of retention, no clinically significant difference in retention capacity was found between the three retention methods. Small but significant differences (P < 0.05) were observed between the V-CTC and V-S groups regarding mandibular canine width, mandibular arch length, and overbite. In group P, two patients failed to co-operate.

Evaluation of orthodontic treatment, retention and relapse in a 5-year follow-up

Tofeldt LN, Johnsson A-C, Kjellberg H. Swedish Dental Journal 2007; 31: 121–127.

Evaluation of orthodontic treatment using the Dental Aesthetic Index

This investigation evaluates dental esthetic differences of orthodontic patients before and after treatment. The orthodontic treatment provided for patients in this investigation involved the use of removable appliances in 85% of the cases, use of fixed appliances in 2% of the cases, and a combination of fixed and removable appliances in 13% of the cases. Records of patients treated at a dental school clinic between 1959 and 1984 were reviewed. Inclusion criteria for this study included complete patient records, and the presence of dental casts for estimation of the Dental Aesthetic Index (DAI). Of the 932 patients, 116 patient records were included. Fifty patients began treatment during the mixed dentition (age < or = 144 months), and 66 were treated during the permanent dentition (age > 144 months). Pretreatment DAI values and component factors were measured and compared with posttreatment values. The DAI scores improved significantly (p < or = 0.0001) in both age groups (paired t test; Bonferroni correction). However, 20% of the patients showed a worsening or no change in the DAI with treatment. In the mixed dentition group, maxillary anterior irregularities, diastema, and overjet showed statistically significant improvement after treatment (p < or = 0.0001). Patients in the permanent dentition showed statistically significant improvement in the crowding of lower incisors, maxillary anterior alignment, and overjet (p < or = 0.0001). Logistic regression analysis defined five statistically significant factors (p < or = 0.05) that could differentiate patients with successful and unsuccessful treatment outcomes.(ABSTRACT TRUNCATED AT 250 WORDS)

Kritische Analyse der Winkel SNA, SNB und ANB bei der Auswertung von kieferorthopädischen Behandlungen

The purpose of this longitudinal cephalometric study was to evaluate the influence of growth changes at nasion (N) on the position of the reference line NSL and consequently on the measurements of the angles SNA, SNB and ANB. Lateral head films from 46 orthodontically treated patients were evaluated over an average period of 3.7 years. The NSL reference line was defined with respect to growth changes at the N-point: A: no consideration of growth; B: consideration of growth in the sagittal plane; C: consideration of growth in the sagittal and vertical planes. The results showed that growth changes at nasion had a decisive influence on the position of the reference line NSL and thus also on the angles SNA, SNB and ANB. In order to avoid misinterpretations in the evaluation of orthodontic treatment results the growth changes at nasion must be taken into consideration.

Description of a new cephalostat and its performance.

Studies of the growth of the facial skeleton and evaluation of orthodontic treatment are some of the most common applications of roentgen cephalometry. Such studies require repeated examination of the patient. This in turn requires good reproduction of the relative positions of the focus of the roentgen tube, the subject and the plane of the film. The roentgen tube and the plane of the film can be fixed to one another. The problem is however, to position the subject in a reproducible relation to the roentgen tube and the plane of the film. MOORREES & KEAN (1958) showed that the head can be positioned unsupported with a remarkably good reproducibility, as judged from two observations at an interval of one week. They roentgenogaphed the subjects sitting at ease looking at themselves in a mirror. However, since BROADBENT'S (1931) and HOFRATH'S (1931) introduction of cephalostats as an aid for obtaining standard lateral head roentgenograms, roentgen cephalometric analyses have been based almost exclusively on roentgenograms obtained with the subject positioned in a cephalostat. Examples of different cephalostat constructions have been published by KROGMAN & SASSOUNI (1957). Most cephalostats are technically complicated, a fact which makes them difficult to handle for auxiliary personnel. The aim of our investigation was to construct a cephalostat which would be simple to operate for assisting personnel. This paper describes a new cephalostat and its performance.