Lip Changes Research Articles

Reference points to evaluate changes in the upper lip after labial incisor movement between tipping and translation in crowding patients: A retrospective study

ObjectiveThis study aimed to compare the changes of reference points on the labial surface of upper incisors (U1) to upper lip (UL) after U1 labial movement between a translation group (TSL) and tipping group (TIP). Correlations between changes in U1 and UL were determined. MethodsLateral cephalometric radiographs were selected and divided into TSL and TIP groups by pre- and post-treatment superimpositions. Skeletal, dental, and soft tissue of pre- and post-treatment treatment and variables were evaluated. Independent t-test and Wilcoxson test were applied for the statistical analysis between TSL and TIP. Spearman’s correlation coefficients and multiple linear regression analysis were used to verify the association between lip profile changes and other variables in TSL and TIP group separately. ResultsAfter U1 labial movement, the incisal edge (LaU1e), middle (LaU1m), and cervical (LaU1c) points of TSL moved evenly labially, whereas the TIP group had incisal edge that moved greater labially than the middle and cervical points. UL moved more labially in TSL (0.87–1.05 mm) than the TIP (0.31–0.41 mm). UL changes to the E-line in TSL showed significant positive correlations to all three LaU1(e, m, c)-SnTV changes. In the TIP group, only a positive correlation presented for the LaU1m-SnTV and LaU1c-SnTV changes. Nevertheless, Multiple linear regression analysis indicated the unfeasibility of predicting the upper lip changing ConclusionLaU1e in TSL and TIP moved almost equally labially but less labially in TIP at the middle and cervical points. The UL moved more labially in TSL than TIP. Rather than using the incisal edge to estimate upper lip changes, it would be better to use the middle and cervical points of U1, which coincide with Labrale superioris (Ls).

Changes in the curvature of upper and lower lips following the first premolar extraction in Class I bimaxillary protrusion - A cephalometric study

Bimaxillary dentoalveolar protrusion is a condition characterized by protrusion of the maxillary and mandibular incisors with increased procumbency of the lips. The treatment of choice for these patients is fixed orthodontic treatment after extraction of four first premolars. This treatment would result in the retraction of anterior teeth with a resultant decrease in soft tissue convexity. Objective of the study is to find out how the curvature of upper and lower lip change following fixed appliance therapy in patients with class I Bimaxillary protrusion following extraction of first premolars. A total of 32 subjects, 13 males and 19 females in the age group of 13-21 years diagnosed with BMP were included in the study. Pre-treatment and post-treatment cephalograms were obtained from subjects satisfying the inclusion and exclusion criteria. Cephalometric landmarks, lines used in the study were marked and analysed. The soft tissue parameters were measured and compared using paired t test and Pearson’s correlation coefficient. The overall effect of orthodontic correction of bimaxillary protrusion from subjects were analysed by evaluating the soft tissue changes between pre-treatment and post treatment cephalometric radiographs. There is a statistically significant difference with decrease in ULST, B`-PM line, B`-LiPog`, A`-PM line, LLIT, LLVT, Pog-Pog` and no statistically significant difference in A`-NtLs and ULVT. The results showed a reduction in lip procumbency. Among the soft tissue parameter studied, there is a statistically significant decrease observed for ULST, B`-PM line, B`-LiPog`, A`-PM line, LLIT, LLVT and Pog-Pog`.

Assessing the Efficacy of Submental Liposuction Association in Orthognathic Surgery: A Systematic Review.

Despite the vast literature on submental liposuction, there are few studies describing its simultaneous association in orthognathic surgery. This systematic review aimed to evaluate the available evidence on the effectiveness of the combination between the 2 techniques. This study followed the Preferred Reporting Items for Systematic reviews and Meta-Analyses checklist and used a comprehensive literature search across 7 databases. All studies discussing submental liposuction in orthognathic surgery were eligible for inclusion, regardless of language. The Joanna Briggs Institute assessment tools were used to assess risk of bias. After a 2-step selection process, a total of 10 studies were included, including 2 cohort studies, 1 case-control study, 1 case series, and 6 case reports. Sixty-seven patients from 5 countries were evaluated. Ages ranged from 15.1 to 50 years. The prevalence according to the facial pattern was similar, with a higher incidence in women. The major indications for surgery were related to the presence of skeletal deformities and aesthetic changes in the cervical region. The forms of evaluation used to indicate surgery were photographs (n = 29; 43.28%), visual scale by 2 surgeons (n = 20; 29.85%), clinical examination (n = 23; 34.32%), and cephalometric analysis (n = 17; 25.37%). The postoperative follow-up time ranged from 6 months to 7.9 years. Despite the different forms of evaluation, all articles mentioned benefits with the association of submental liposuction in orthognathic surgery. The most cited complications were sensory changes in the lower lip (n = 4; 5.97), facial nerve injury (n = 2; 2.98%), infection (n = 2; 2.98%), maintenance of submental lipomatosis (n = 2; 2.98%), and skin irregularities (n = 2; 2.98%). This systematic review showed that submental liposuction associated with orthognathic surgery improves cervical aesthetics and that it is safe, with a low rate of complications. However, the number of studies on this topic is limited, and the studies are not standardized. There is lack of information especially regarding the evaluation methods used. Metric techniques such as ultrasound and tissue caliper adipometry could be possibilities for future studies.

Impact of Tongue-in-Groove Technique on Smile and Lip Position: A Comparative Analysis with and without Septal Extension Graft.

This study was conducted to compare the outcomes of the tongue-in-groove (TIG) technique with and without septal extension graft (SEG) on smile and lip position in rhinoplasty. Fifty-eight rhinoplasty patients, treated at a tertiary referral center between 2020 and 2022, underwent preoperative and 12-month postoperative evaluations, using the Standardized Cosmesis and Health Nasal Outcomes Survey (SCHNOS) and the visual analog scale (VAS). The preoperative and 12-month postoperative photographs were analyzed using Adobe Photoshop to assess changes in lip and smile positions. The study included 38 patients in the TIG with SEG group and 20 patients in the TIG without SEG group. The participants, with an average age of 32.12 ± 7.97 years, comprised 81% females. In terms of surgical outcomes, postoperative evaluations revealed significant improvements in the VAS aesthetic score, SCHNOS-O score, and SCHNOS-C score compared with preoperative scores (p < 0.001) for both groups. Notably, both groups demonstrated significant improvements in the upper lip length, nasolabial angle (NLA), columellar inclination (CI) angle, and smile NLA. Patients in the SEG group exhibited markedly superior SCHNOS-O results, as well as distinctions in smile NLA and smile CI, compared with the group without SEG. The impact of rhinoplasty techniques on lip and smile remains complex requiring further evaluation. Both of the TIG techniques, with and without SEG, resulted in positive outcomes in terms of improving lip and smile positions, with the use of SEG demonstrating greater stability during a smile.

Can the Upper Vermilion and the Nasolabial Fold Be Changed With Orthognathic Surgery?

BackgroundRetrusive profiles show an appearance of aging with an under-projected vermilion and pronounced nasolabial folds due to deficient bone support. PurposeA study was made of the association between orthognathic surgery and changes in the nasolabial and vermilion areas in patients with retrusive profiles. Study design, setting, sampleA retrospective cohort study evaluated patients subjected to bimaxillary surgery according to the Barcelona Line (BL) protocol during 2021 at Teknon Medical Center (Barcelona, Spain). Subjects with craniofacial syndromes, facial aesthetic procedures, and dental rehabilitations involving lip changes, were excluded. Predictor variableThe predictor variable was the timing of cephalometric measures, reported as T0 (preoperatively), T1 (one month after surgery), and T2 (after one year of follow-up). Main outcome variableThe outcome variable corresponded to the soft tissue changes of the nasolabial and vermilion area, reported as the nasolabial fold length and angle, nasolabial angle, upper lip concavity, vermilion length, and upper lip sagittal distance from BL. CovariatesThe covariates comprised patient demographic data, the surgical-orthodontic protocol, and the magnitude and direction of the skeletal movements. AnalysesDescriptive and inferential analyses were performed based on analysis of variance (ANOVA), the Bonferroni test, Pearson’s linear coefficient, the nonparametric Mann-Whitney U-test, Kruskal-Wallis test, and multiple linear regression models. Statistical significance was considered for p < 0.05. ResultsThe sample comprised 27 subjects with a mean age of 32.5 ± 11.2 years. A mean decrease in nasolabial angle of 5.5 ± 6º was recorded (p < 0.001), with a shortening of the nasolabial fold length of 4.4 ± 7.6 mm (p=0.019). An increase in upper lip concavity angle of 14.4 ± 12º was recorded (p < 0.001), along with a vermilion lengthening of 1.6 ± 1.3 mm (p < 0.001) and an increase in upper lip sagittal distance to BL of 5.7 ± 7.3 mm (p=0.001), indicating a more projected and everted upper vermilion. Conclusions and relevanceWhen adequate dentoskeletal support is provided by specific positional changes of the jaws planned through orthognathic surgery, the length of the nasolabial fold decreases, and the upper vermilion lengthens and becomes slightly everted.

Quantifying Sagittal Lip Changes in Patients with Bilateral Cleft Lip Post Abbe Flap Reconstruction.

To objectively quantify results of sagittal lip changes following Abbe flap reconstruction in patients with bilateral cleft lip. Retrospective, observational study. Single institution, 8-year retrospective review. In total, 17 patients with bilateral cleft lip that underwent Abbe flap reconstruction were included in this study. Patients had lateral photographs taken prior to Abbe flap reconstruction and at least 8 months post-Abbe flap. Vegter's index, Sushner's S2 line and Burstone's B line reference lines were used for evaluation of sagittal lip changes. Wilcoxon signed rank tests were used in analysis. The mean pre-Abbe flap upper to lower lip ratio, defined as Vegter's Lip Index, was 0.906 compared to a mean of 0.946 following Abbe flap reconstruction. The mean upper to lower lip ratio for Sushner's S2 and Burstone's B line exhibited an increase in upper lip sagittal projection from -0.164 to 1.459 and 0.259 to 0.957, respectively (P < 0.001). This study quantifies sagittal changes to upper and lower lip position after Abbe flap reconstruction. These findings may aid in operative planning and patient/caregiver expectations during counseling.

Treatment outcomes of digital nasoalveolar moulding in infants with cleft lip and palate: A systematic review with meta-analysis.

The aim of this systematic review was to compare the treatment outcomes of digital nasoalveolar moulding (dNAM) technique with conventional nasoalveolar moulding (cNAM) or non-presurgical intervention protocol in infants with unilateral (UCLP) or bilateral (BCLP) cleft lip and palate. A bibliometric search by MEDLINE (via Ovid), Embase, Cochrane Library, grey literature and manual method was conducted without language restriction until November 2023. Literature screening and data extraction were undertaken in Covidence. The risk of bias was evaluated using the Newcastle-Ottawa Scale and RoB-2. Pooled effect sizes were determined through random-effects statistical model using R-Software, and the certainty of evidence was assessed using the GRADE approach. Among 775 retrieved articles, nine studies were included for qualitative synthesis (6-UCLP, 3-BCLP), with only three eligible UCLP studies for meta-analysis. In the UCLP group, very low certainty of evidence indicated no difference in alveolar cleft width (SMD, 0.13 mm; 95% CI, -0.31 to 0.57; I2, 0%), soft tissue (lip) cleft gap, nasal width, nasal height, and columellar deviation angle changes between dNAM and cNAM. In the BCLP group, qualitative synthesis suggested similar changes in alveolar, lip, and nasal dimensions with dNAM and cNAM. In both cleft groups (UCLP, BCLP), reduced alveolar cleft width was observed in the dNAM group compared to the non-presurgical intervention protocol, along with fewer clinical visits and reduced chairside time for dNAM compared to cNAM. It can be concluded that the treatment outcomes with dNAM were comparable to cNAM in reducing malformation severity and were advantageous in terms of chairside time and clinical visit frequency. However, the overall quality of evidence is very low and standardization is needed for the virtual workflow regarding the alveolar movements and growth factor algorithms. Registration: PROSPERO-database (CRD42020186452).

Pre- and post- treatment changes in lip position: A retrospective cephalometric study on bimaxillary protrusion cases

Pre and Post treatment changes in lip position To determine the changes in lip position in pre and post treatment lateral Cephalogram in bimaxillary protrusion cases. Retrospective Cephalometric study on bimaxillary protrusion cases. The study comprised of 45 subjects (6 Male and 39 Females) aged between 18 to 26 years having Bimaxillary protrusion malocclusion and treated with all four first premolar extraction. The pre-treatment and post treatment lateral cephalograms were traced and landmarks were identified Statistical analysis used: Statistical Package for the Social Sciences (SPSS Version 23; Chicago Inc., IL, USA), Kolmogorov –Smirnov and Shapiro Wilk tests, One-way analysis of variance (ANOVA), Tukey's post hoc analysis. A positive correlation was found in changes in pre- and post-treatment changes in upper lip curvature, H-Line Angle, Upper sulcus depth, Upper lip strain, changes in the upper lip and the soft tissue from the nose tip, length of upper and lower lip, Nasolabial angle, Upper lip protrusion, Lower lip protrusion. However changes in Facial angle, Steiner’s S line, Upper and lower lip thickness were not statistically significant. Treatment of Bimaxillary protrusion cases with extraction of all four first premolars resulted in a significant improvement in facial profile, esthetics and enhanced the soft tissue harmony.

Effects of Maxillary Movements on Lips Following Orthognathic Surgery: A Retrospective Non-Randomized Clinical Trial.

Introduction Lips play a fundamental role in facial attractiveness and in decisions pertaining to orthognathic surgery. Objective To assess the upper lip changes following Le Fort I osteotomy for maxillary advancement and/or impaction. Methods In the present retrospective non-randomized clinical trial, we evaluated 3 groups of patients who underwent Le Fort I osteotomy of the maxilla. Group 1 (n = 35) underwent maxillary advancement, group 2 (n = 14), maxillary impaction, and group 3 (n = 11) was submitted to both maxillary advancement and impaction. The lip thickness of all patients was measured preoperatively, and the participants in each group were categorized into two subgroups: thin (< 12 mm) and thick (> 12 mm) lip. The primary (before orthognathic surgery) and final (after orthodontic bracket removal) lateral cephalograms of the patients were analyzed using the Dolphin software. Comparisons were made using the paired t -test and linear regression in the IBM SPSS Statistics for Windows software. Results The length of the upper lip increased by 1 mm ( p = 0.012) on average following maxillary advancement, and it decreased by 0.43 mm ( p = 0.24) on average following maxillary impaction. In the maxillary advancement group, the change in angulation of the incisors predicted the incisal display ( p = 0.03). In the maxillary impaction group, skeletal changes in the vertical dimension predicted changes in upper lip length ( p = 0.033). Conclusions Le Fort I osteotomy for maxillary advancement significantly increases the length of the upper lip. The assessment of lip thickness prior to surgery can help predict the postoperative results. Changing the angulation of the incisors can predict the incisal display. In maxillary impaction, skeletal changes in the vertical dimension can predict the changes in the length of the upper lip.

Facial profile evaluation and prediction of skeletal class II patients during camouflage extraction treatment: a pilot study

BackgroundThe evaluation of the facial profile of skeletal Class II patients with camouflage treatment is of great importance for patients and orthodontists. The aim of this study is to explore the key factors in evaluating the facial profile esthetics and to predict the posttreatment facial profile esthetics of skeletal Class II extraction patients.Methods124 skeletal Class II extraction patients were included. The pretreatment and posttreatment cephalograms were analyzed by a trained expert orthodontist. The facial profile esthetics of pretreatment and posttreatment lateral photographs were evaluated by 10 expert orthodontists using the visual analog scale (VAS). The correlation between subjective facial profile esthetics and objective cephalometric measurements was assessed. Three machine-learning methods were used to predict posttreatment facial profile esthetics.ResultsThe distances from lower and upper lip to the E plane and U1-APo showed the stronger correlation with profile esthetics. The changes in lower lip to the E plane and U1-APo during extraction exhibited the stronger correlation with changes in VAS score (r = − 0.551 and r = − 0.469). The random forest prediction model had the lowest mean absolute error and root mean square error, demonstrating a better prediction accuracy and fitting effect. In this model, pretreatment upper lip to E plane, pretreatment Pog-NB and the change of U1-GAll were the most important variables in predicting the posttreatment score of facial profile esthetics.ConclusionsThe maxillary incisor protrusion and lower lip protrusion are key objective indicators for evaluating and predicting facial profile esthetics of skeletal Class II extraction patients. An artificial intelligence prediction model could be a new method for predicting the posttreatment esthetics of facial profiles.

A Review of Lip Print as A Tool in Forensic Dentistry

Background: Forensic dentistry requires interdisciplinary knowledge since the data obtained from the oral cavity can contribute to identify an individual or provide the information needed in a legal process. Identification is a major problem facing forensic practitioners, DNA and fingerprints are highly useful but sometimes are not easily collected from the crime scene. Lip print could be useful in this field the lip prints are unique and distinguishable for every individual like fingerprints. The external surface of lips has many elevations and depressions forming a characteristic pattern called lip prints, examination of which is known as Cheiloscopy. However, there are many well-known implanted methods of human identification. Historical Background: The biological phenomenon of systems of grooves on the red part of human lips was first noted by anthropologists, Fischer was the first to describe it in 1902. The use of lip prints in personal identification was first recommended in France by Edmond Locard. Conclusion: This literature search covering a part of identifying a person using lip print, lip prints may also be used in detection work, being the source of criminalistic information. A lip print at the scene of a crime can be a basis for conclusions as to the character of the event, the number of the people involved, sexes, cosmetics used, habits, occupational traits, and the pathological changes of lips themselves.

Using a structured light scanner to evaluate 3-dimensional soft-tissue changes after extracting 4 premolars in young adult female patients

Facial esthetics have always received much attention in orthodontic treatment, especially in young adult female patients. Three-dimensional (3D) soft-tissue changes after orthodontic extraction have not been fully explained. This study evaluated the 3D morphologic changes after orthodontic extraction in young female patients using a structured light scanner. Forty-five adult female patients aged 20-25 years were enrolled in our study. The treatment group consisted of patients who received orthodontic treatment with 4 premolar extractions, and the control group was composed of young female volunteers who had not undergone any orthodontic treatment. To monitor the soft-tissue changes, 9 morphologic regions and 12 landmarks were identified for the 3D deviation analyses. The spatial deviations of landmarks and regions in the x, y, and z directions were constructed for quantitative analysis. Color map images were constructed to visualize soft-tissue displacement as a qualitative evaluation. The paired sample test was used to compare differences at the beginning of the experiment (T0) and after 24 months (T1) in both groups. An independent t test with Bonferroni correction was performed to compare differences between the treatment and control groups. A linear regression test was performed between incisor retraction and changes in the perioral tissues. Subtracting the effect of aging from the lip changes in the control group, the treatment group showed a statistically significant difference in the displacement of labrale superius (-1.37 mm), labrale inferius (-1.89 mm), the upper lip region (-0.98 mm), and the lower lip region (-1.36 mm) along the z-axis. No significant differences were found between the treatment and control groups in the temporal, parotideomasseteric, and buccal regions. Pearson correlation tests indicated a positive correlation between incisor tip retraction and changes in soft tissues (two-dimensional cephalometric analysis, 3D landmark measurements, and 3D regional measurements). The correlation coefficient ranged between 0.45 and 0.55. Three-dimensional soft-tissue changes were mainly concentrated in the upper and lower lip regions in adult female patients after the 4 premolars were extracted. For female patients aged 20-25 years with 4 extracted premolars, soft-tissue changes in the temporal, parotideomasseteric, and buccal regions were not clinically significant.

LipFormer: Learning to Lipread Unseen Speakers Based on Visual-Landmark Transformers

Lipreading refers to understanding and further translating the speech of a video speaker into textual outputs. State-of-the-art lipreading methods excel in interpreting overlap speakers, i.e., speakers appear in both training and inference. However, generalizing those methods to <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">unseen</i> speakers incurs catastrophic performance degradation due to the limited number of speakers in training bank as well as the dominant visual variations caused by the shape/color of lips presented by different speakers. Therefore, merely depending on the visible changes of lips tends to overfit the model. To improve to generalise, in this paper we propose to use multi-modal features, i.e., visual and landmark, to describe the lip motion while being irrespective to speaker characteristics. The proposed sentence-level framework, dubbed <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LipFormer</i> , is based on visual-landmark transformer architecture wherein a lip motion stream, a facial landmark stream, and a cross-modal fusion are interconnected. More specifically, the two-stream embeddings produced by self-attention are prompted into a cross-attention module to achieve the alignment across visual and landmark variations. The resulting fused features are decoded into linguistic texts by a cascaded sequence-to-sequence translation. Extensive experiments demonstrate that our method can generalise well to unseen speakers in multiple datasets.

Evaluation of tongue pressure and lip closing force in bimaxillary orthognathic surgery: A retrospective study

The purpose of this study was to quantitatively compare changes in tongue pressure and lip closing force among skeletal Class II and Class III patients, who had undergone orthognathic surgery, and a control group.Maximum tongue pressure and lip closing forces were measured preoperatively and at 6 and 12 months postoperatively. Time-course changes were analyzed and compared among the groups.The control group involved 40 skeletal Class I occlusion volunteers (20 male and 20 female), the Class II group involved 20 female patients, and the skeletal Class III group involved 40 patients, who were subdivided by sex into two groups comprising 20 males and 20 females, respectively. Time-course changes in tongue pressure were not significantly different between and within groups. However, postoperative lip closing forces became gradually higher in the Class III group female and male subjects compared with the control group, although this was not observed in the Class II group. There were significant correlations between tongue pressure and lip closing force before and after surgery (p = 0.001), and these correlations increased over time.Although there was no significant increase in maximum tongue pressure after orthognathic surgery, there was an associated increase in perioral muscle strength. This suggests that an increase in perioral muscle strength may contribute more to the stability of postoperative jaw morphology.

Changes in Soft Tissue Variable of Lips Following Retraction of Anterioir Teeth- A Cephalometric Study.

The purpose of this study was to assess the short-term perioral soft tissue variations of the lips before and after treatment cases in 15 patients with bi-maxillary protrusion using treated lateral cephalograms who had already achieved active growth. Fifteen pre-treatment and post-treatment lateral cephalometric radiographs of 18-25-year-old individuals with bimaxillary protrusion treated with all four 1st premolar extractions were accessed from the records. From the reference planes and landmarks, 13 horizontal, 10 vertical, and 2 angular measurements were noted. Statistical comparisons between pre-treatment and post-treatment measurements were measured by a paired t-test to assess the importance of the mean variations at the predetermined significance level. Pearson's correlation coefficient (R) was utilized to assess the strength and significance of the linear relationship between the mean differences for paired (dependent and independent) variables. Pearson's correlation exhibited a noteworthy positive association between the horizontal changes in upper lip position and the horizontal changes of the upper incisor tip point (H-tU1) (R = 0.748), the upper incisor cervical point (H-cU1) (R = 0.707), the lower incisor tip point (H-tL1) (R = 0.839), and the lower incisor cervical point (H-cL1) (R = 0.767). This indicated that upper lip changes are the aftermath of the retraction of the upper and lower incisors in class I bi-maxillary protrusion malocclusion. Thick upper lips showed more retraction of the upper lip in correlation with retraction of the incisors as compared with thin lips. The lower incisor cervical point displayed the strongest association with lower lip retraction.

Change in Lower Lip Position After Le Fort I Advancement in Patients with Bilateral vs. Unilateral Cleft Lip and Palate.

To compare lower lip changes after Le Fort I advancement surgery in patients with a cleft. Single institution, retrospective review. Academic tertiary referral hospital. Skeletally mature patients with a cleft who underwent one-piece Le Fort I advancement surgery who had a lateral cephalogram or cone-beam computed tomography (CBCT) scan preoperatively and at least 6 months postoperatively. Patients who underwent concomitant mandibular surgery or genioplasty were excluded. 64 patients were included: 45 male and 19 female, 25 with BCLP and 39 with UCLP. The mean age at surgery was 18.4 years. Single jaw one-piece Le Fort I advancement surgery. Standard lateral cephalometric landmarks of the bony skeleton and soft tissue were compared before and after Le Fort I advancement. Pearson correlation coefficients (r) were calculated to measure the correlation between lower lip position and other soft and hard tissue changes. After comparable maxillary advancements [BCLP: 7.2 mm (95% CI: 6.2-8.3 mm), UCLP: 6.4 mm (95% CI: 5.7-7.0 mm)] the horizontal upper-to-lower lip discrepancy significantly improved in both groups. The lower lip became thinner and more posteriorly positioned. Changes in lower lip position correlated strongly with mandibular bony landmarks and moderately with upper lip position, but poorly with maxillary landmarks. Le Fort I advancement results in posterior displacement of the lower lip and better lip competence, thereby improving facial harmony. This lower lip change is not predictable by degree of maxillary advancement, and does not differ in patients with BCLP vs. UCLP.

Labial and Palatal Pressure Changes in Extraction Cases Before and After Maxillary Incisor Retraction: A Quasi-Experimental Study.

To evaluate the changes in lip and tongue pressure before and after incisor retraction in patients undergoing orthodontic treatment with premolar extraction and incisor retraction. A Quasi-experimental study Place and Duration of the Study: Orthodontic Department at Dow University of Health Sciences, Pakistan, from January 2018 to November 2019. The study included 64 patients who were divided into two groups, (32 patients of class I and 32 patients of class II malocclusion). The lip and tongue pressures were recorded before and after incisor retraction with the help of Flexiforce sensor. The collected data were statistically analysed using the SPSS V-24 software. Shapiro-Wilk test was used to test the normality of data. The mean difference between lip and tongue pressure before and after incisor retraction was analyzed by Wilcoxon Signed Ranks Test. The difference in soft tissue pressures between class I and class II treatment groups was carried out using the Mann Whitney test. The mean pressure on the labial surface of incisors was significantly reduced after premolar extraction and incisor retraction (p ≤0.001). On the other hand tongue pressure on the palatal side of incisors was enhanced after incisor retraction (p=0.008) Comparing the differences between Angle's class I and class II malocclusion in mean pressure changes before and after incisor retraction revealed that the difference was not statistically significant on labial (p=0.58) or palatal side (p=0.28) of maxillary incisors. Reduced lip pressure and increased tongue pressure were observed after incisor retraction, whereas no significant change was seen in between the class I and class II cases. This signifies that orthodontic extraction affects the pressure changes on incisors and teeth do not remain in balance equilibrium at rest. Lip pressure, Tongue pressure, Orthodontic treatment, Flexiforce resistive sensor, Extraction, neutral zone.

Louis Armstrong’s Lip Problems: Satchmo’s Syndrome Reviewed

This study is a biographical review and an analysis of the existing photographs of Armstrong's lip with the aim of better understanding the origin and progression of his disorder. A review was made of the most important biographies, newspapers, and magazines referring to Louis Armstrong and medical reports about Satchmo's syndrome. Major archives related to Louis Armstrong were searched for documents, photographs, articles, videos, letters, and other items, using the terms "lip," "embouchure," "mouth," and "problem." Information was sought on Armstrong's playing technique, playing schedule, lip changes, lip problems, and other related health issues. It was found that Louis Armstrong suffered dermatological lip problems due to his intense playing schedule and the way he played from the very beginning of his career. This first created swelling and superficial erosions that later became cracks and fissures. These lesions finally produced ulcers which evolved into scar tissue after healing. This made the mucosa thicker and stiffer, making it more difficult for the lip to vibrate and forcing him to increase the tension and pressure in the area in order to play the trumpet. This created a vicious cycle with the scar tissue leading to further problems. These injuries even bled several times while he was playing and, on some occasions, left his mouth and clothes bloodied in the middle of concerts. His biography does not make any reference to difficulties or symptoms that could indicate that he had orbicularis oris muscle rupture, except for the fact that he had trouble playing, a symptom common to any injury to the lips in a wind instrument player. Analysis of the existing data indicates that Louis Armstrong's lip problems were most likely due to mucosa fibromatous hyperplasia resulting from chronic microtrauma rather than a rupture of the orbicularis oris muscle. Therefore, we propose that this disorder should no longer be referred to as Satchmo's syndrome.

Soft-Tissue Changes in Unilateral Cleft Lip and Palate Patients after Non-surgical Maxillary Advancement with Face Mask Therapy - A Prospective Cohort Study.

The aim of this study was to evaluate soft-tissue changes in Egyptian cleft lip/palate (CLP) patients after conservative non-surgical maxillary advancement using face mask therapy. This prospective cohort study included 20 Egyptian patients with unilateral CLP, six females and 14 males, ranging in age from 10 to 15 years and suffering from moderate maxillary deficiency. These patients had been chosen randomly from the Oro-dental Genetics Clinic at the National Research Centre, Egypt. For lateral cephalometry tracing and superimposition of pre-operative and post-treatment data, this study used Dolphin 11.0 software. Subnasal (Sn), pronasal (Pn), soft tissue pogonion (Pg), labial superior (Ls), stomion superioris (Ss), labiale inferior (Li), stomion inferioris (Si) and soft tissue Menton (Me) were the soft tissue points used in this analysis. All of the cases were successful and demonstrated a positive response to the orthodontic traction. All post-operative linear measurements of the measured soft-tissue points showed statistically significant advancement (P = 0.05) except for pronasal linear measurements, which did not show a significant difference post-treatment (P = 0.84). With the use of the face mask procedure, both upper and lower lip soft-tissue points improved significantly, but nasal points remained unchanged, requiring more management.

Clinical details in the diagnosis of Kawasaki disease

Kawasaki disease (KD) is one of the leading causes of acquired heart diseases in children aged under 5 years. The clinical manifestations of KD include fever, changes in the extremities, rash or redness at the site of bacille Calmette-Guérin vaccination, bilateral bulbar conjunctival hyperemia, changes in lips and mouth, nonsuppurative cervical lymphadenopathy, and other systemic manifestations. There are difficulties in the diagnosis of KD due to its asynchronous clinical manifestations. With reference to the latest case reports and research advances in KD, this article summarizes the clinical details in the diagnosis of KD, so as to improve the level of clinical diagnosis of KD.