The effects of lip bumper therapy in the mixed dentition (original) (raw)
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Long-term development of malocclusion traits in orthodontically treated and untreated subjects
American Journal of Orthodontics and Dentofacial Orthopedics, 2010
Introduction: The purposes of this study were to analyze long-term changes in malocclusion traits and to compare the development in orthodontically treated and untreated subjects. Methods: The sample comprised 308 adolescents in the intermediate, late mixed, or early permanent dentition who were examined clinically at the ages of 8 to 17 years and again 25 years later. The treated subgroup of 58 subjects had received orthodontic treatment with fixed or removable appliances or both. All subjects had a full complement of teeth, except a subgroup of 19 who had premolar extractions as a part of their orthodontic treatment plan. Results: The prevalence of maxillary overjet was significantly reduced in the untreated group and the treated subgroups. The prevalence of distal molar occlusion was significantly reduced in the subgroup treated without extractions. Comparison of treated and untreated groups in terms of changes over time showed that development was significantly more favorable in all treatment categories regarding maxillary overjet, and in the nonextraction category regarding distal molar occlusion. Subjects treated without extractions had less favorable development than did untreated subjects regarding molar crossbite. Conclusions: The long-term benefit of orthodontic treatment, with or without extractions, was confirmed regarding maxillary overjet, and the lasting effect of nonextraction treatment was confirmed regarding the distal molar relationship. The pattern of changes in treated and untreated subjects indicated that long-term development and individual variation can to some extent conceal the effects of a brief orthodontic intervention. (Am J Orthod Dentofacial Orthop 2010;138:277-84)
The Journal of the American Dental Association, 2017
alocclusion is a public health problem. Various population-based studies have demonstrated a high prevalence of the condition. 1-3 Dental malocclusion is receiving increasing attention, not only from specialists but also from members of the general population who are seeking treatment for the condition. Although crowding of the dentition is common and constitutes the main reason for seeking orthodontic treatment, 4 there is no consensus on the appropriate methods for correcting this anomaly. 5 There is evidence of lip retraction in patients who underwent premolar extractions for orthodontic purposes. 6-8 That biological response of lip retraction after extraction has been used as a strong argument against extraction by orthodontic specialists who claim that premolar extractions have a negative esthetic impact. The purpose of our study was to systematically review the literature to evaluate changes in facial esthetics and profile resulting from orthodontic treatment with and without extraction of 4 premolars, differences in the duration of the treatments, and determine any cephalometric parameters that can assist decision making in borderline cases. METHODS
Lip Morphological Changes and Differences before and after Orthodontic Treatment
Bangladesh Journal of Orthodontics and Dentofacial Orthopedics, 2013
Objectives: The objective of this study is to test the hypothesis that there is a difference in the morphology of the lips of Class II div 1 and Class III malocclusion, before and after orthodontic treatment. Methods: The sample subjects included 20 adult female patients with Angle Class II div 1 malocclusion and 30 adult female patients with dento-skeletal Class III malocclusion. Frontal photographs were taken both before and after orthodontic and/or orthognathic treatment. Thirty-five landmarks were placed on each tracing made from the photograph. Thereafter, landmarks were digitized into an x and y coordinates system with the subnasal point as the origin. The Class II pretreatment and posttreatment groups of rest and smile conditions were compared with the Class III group respectively, using t-tests. Results: In the Class II pretreatment group, upper and lower lips positioned downward than that in the Class III group. When smiling, there was no statistically significant differenc...
A Retrospective Study on Patients Treated With Standard Orthodontics
European Journal of Inflammation
In standard orthodontic treatment (SOT), despite several innovations incorporated to the original “edgewise” system, principles and applications remain essentially the same of those introduced by Angle in 1928, when a rectangular wire was associated to a bracket with a rectangular slot, enabling three-dimensional movements. However, besides visibility of the appliance during orthodontic treatment, the labio-lingual inclination of maxillary and mandibular incisors and canines is considered by patients and orthodontists to be an important determinant in providing aesthetic outcome after orthodontic treatment. Furthermore, the correct inclination of the anterior teeth is essential in providing good occlusion in anterior and posterior regions, and is basically dependent on the correct expression of torque. Here a case series of patients treated with SOT is performed to verify the efficiency, effectiveness, and stability of treatment. Twenty-two patients (11 females and 11 males, median ...
Lip Changes Following Non-Extraction Orthodontic Treatment
Modern Research in Dentistry, 2019
Introduction: The purpose of this study was to predict the lip changes in Class I adolescents and adults following non-extraction orthodontics treatment. Methods: This longitudinal retrospective study evaluated the pre-and post-treatment lateral cephalograms of 40 adults and 72 adolescents with Angle Class I molar relationships and crowding in both arches. The horizontal and vertical changes of 15 landmarks, along with lip thickness and taper, were evaluated. The sample was randomly divided into two group; 76% of the subjects were used to develop the multivariate regression formulas; the remaining 24% served as a validation sample. Result: Adolescent lips moved inferiorly and anteriorly during treatment; adult lips showed lesser inferior movement, little or no anterior movement and decreases in thickness. Males demonstrated significantly greater inferior and, mostly, greater anterior changes of lip position. The multivariate regressions explained 48-59% and 41-69% of the vertical and horizontal variation of the lip changes, respectively. When the prediction equations were applied to the validation sample, with correlations ranged from 0.60-0.84, indicating external validity. Conclusion: The lip changes of Class I adolescents and adults treated with non-extraction orthodontic treatment can be predicted with fair to moderate accuracy. Adults' lips became compressed and thinner, while the upper lip thickness of adolescents did not change or become slightly thicker.
Outcomes of an inappropriate orthodontic treatment plan - a case series study
Progress in Orthodontics, 2000
This investigation was conducted to evaluate the periodontal, cephalometric, and esthetic sequelae in a small sample of clear-cut four first premolar extraction cases that were treated by a nonextraction modality. These patients were compared to an equal number of correctly treated four first premolar extraction cases and another group of nonextraction cases. Periodontal pocket depths and width of keratinized gingiva were measured clinically. Pre-treatment and post-treatment cephalometric measurements were also collected. Patients were asked to rate their own perception of the extent of esthetic change in their pre-and post-treatment facial profiles on a visual analog scale. A similar visual analog scale was used by laypersons to evaluate the esthetics of post-treatment facial profile photographs. Results showed that the patients in the 'wrong treatment' group had significantly less keratinized gingiva associated with both upper and lower anterior teeth as well as the upper and lower left first molars. Cephalometric measurements showed an excessive increase in the protrusion of teeth in patients who received the wrong treatment as compared to both control groups. Patients who were treated with first premolar extractions reported significant favorable profile changes. Laypersons could not detect any differences amongst the three groups in post-treatment profile esthetics. This study could not demonstrate a benefit to the patient from an ill-applied, fashionable nonextraction therapy.
Lip Morphological Changes in Orthodontic Treatment
The Angle Orthodontist, 2009
Objective: To evaluate the morphological changes in the lips and to determine the degree of improvement in the smile after orthodontic treatment for Class II division 1 malocclusion. Materials and Methods: The sample subjects were divided into two groups: a group that consisted of 20 adult female patients with Angle Class II division 1 malocclusion and a control group that consisted of 28 adult female volunteers with normal occlusion. Frontal photographs were taken before and after orthodontic treatment, and 35 landmarks were placed on each tracing made from the photograph. Thereafter, landmarks were digitized into an x- and y-coordinate system with the subnasal point as the origin. The comparisons between pretreatment and posttreatment at rest and on smiling, and the comparisons between Class II division 1 and control group were made using Student's t-test. Results: Both the upper and lower lips in the smile of patients in the Class II division 1 pretreatment group were positio...
Dentoskeletal Changes Following Orthodontic Treatment Original Research
2012
Introduction: The purpose of this study was to evaluate vertical facial and dental changes after orthodontic treatment with extraction of first four premolars, and to find whether long facial height could influence the treatment result. Methods: Fifty-six orthodontic patients with the minimum age of 15, whose treatment plan involved extracting four first premolars, participated in the study. The patients included 30 females and 27 males. Cephalometric measurements before and after treatment were compared using a paired T-test. Independent T-test was employed to compare post treatment changes for each parameter between normal and long face groups. The same analysis performed between male and female subjects. Results: Treatment changes revealed a significant increase in the vertical distance from the upper molar to palatal plane, the lower molar to mandibular plane and Menton to palatal plane in all groups. There was significantly more increase in most post-treatment linear measuremen...