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1.
Dental Press J Orthod ; 25(2): 44-51, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-32490926

RESUMO

OBJECTIVE: To evaluate facial profile changes promoted by polymethyl methacrylate (PMMA) cement graft to reduce excessive gingival display due to hyperactivity of the elevator muscles of the upper lip during smiling. METHODS: Eleven patients (all females, age range: 20 to 43 years) presenting gingival smile that were treated with PMMA cement grafts in a private clinic were selected for this retrospective study. Three angular and ten linear cephalometric facial profile measurements were performed preoperatively (baseline, T1) and at least 6 months postoperatively (T2). Differences between T1 and T2 were verified by Wilcoxon test, and the correlation between the thickness of the graft and facial profile changes was statistically evaluated by Spearman's Coefficient test. The significance level was set at p< 0.05. RESULTS: The nasolabial angle (p= 0.03) and the labial component of the nasolabial angle showed statistically significant differences (p= 0.04), with higher values in T2. No correlations were found between the graft thickness and the statistically significant facial profile changes (p> 0.05). CONCLUSIONS: The PMMA bone cement graft projected the upper lip forward, thereby increasing the nasolabial angle without affecting the nasal component. No correlations between the graft thickness and the facial profile changes were detected.


Assuntos
Cimentos para Ossos , Sorriso , Adulto , Cefalometria , Feminino , Gengiva , Humanos , Lábio , Estudos Retrospectivos , Adulto Jovem
2.
J Orofac Orthop ; 81(4): 239-248, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32393993

RESUMO

BACKGROUND: This study collected 68 smiling photos of cases taken to American Board of Orthodontics clinical exam and were considered as successfully treated. MATERIALS AND METHODS: A panel of 52 raters from different specialties and laypeople were asked to rate the smile attractiveness on a scale from 1-10 and to also choose what components made the smile less attractive. Simple descriptive statistics were used to determine the mean, standard deviations, and quartiles of the smile attractiveness. Multilinear regression (MLR) analysis was used to examine the relationship of smile attractiveness when the variables of age, professional experience, and gender of the raters were considered. Receiver operating characteristic (ROC) was created to correlate the association between smile attractiveness and the perfect smile. RESULTS: The mean rating of each picture ranged from 3.42 ± 1.83 (least attractive smile) to 8.46 ± 1.59 (most attractive smile). The overall mean for smile attractiveness was 6.23 ± 1.09; additionally, it was found that problematic teeth, gum, and lips reduce the smile attractiveness score by 1.7, 1.7, and 1.2, respectively. CONCLUSION: The study showed that only 2 out of 68 American Board of Orthodontics treatment finishes had an attractive and perfect smile.


Assuntos
Ortodontia , Sorriso , Estética Dentária , Gengiva , Humanos , Lábio , Estados Unidos
3.
Int J Esthet Dent ; 15(2): 140-156, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32467944

RESUMO

A digital smile diagnosis based on Digital Smile Design (DSD) concepts reinforces the predictability and precision of orthodontic and multidisciplinary cases as it allows more accurate planning from an esthetic point of view. The intention of this clinical case series was to verify the relationship between the ideal and adapted smile in three orthodontic multidisciplinary cases treated using the Invisalign system in order to have a better understanding of the correlation between the several smile components. The ideal smile construction requires face, lips, gingival tissue, and tooth analysis and evaluation, as well as the appreciation of how all these aspects occur together. When the ideal smile line is not achievable in difficult clinical situations, the treatment goal would be an adaptation to the same line that supports a more predictable movement range. These DSD and orthodontic concepts should be primarily applied, since all intermediate involvement, as well as the final outcomes, are essentially planned from the beginning in clear aligner treatments. The presented case series allowed the authors to understand the importance of these digital diagnostic tools in dealing with certain particularities in orthodontic clear aligner treatments, both at the beginning and during the refinement/finishing stages.


Assuntos
Estética Dentária , Aparelhos Ortodônticos Removíveis , Gengiva , Humanos , Lábio , Sorriso
4.
Int J Esthet Dent ; 15(2): 158-172, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32467945

RESUMO

BACKGROUND: The lightness of teeth and the distances of the upper and lower lip from the maxillary cervical and incisal lines are factors that correlate with smile attractiveness. PURPOSE: This study investigates the degree of association of the above factors with smile attractiveness and evaluates the possible effect of evaluators' gender, age, occupation, and education level on the perception of smile attractiveness. MATERIALS AND METHODS: An almost perfect smile of an adult Caucasian female was altered to create various smile images with differences in lightness of teeth and upper and lower lip positions. The images were randomly assembled in three slides of four, seven, and five images each and presented to 130 participants to evaluate the most attractive smile (MAS) and the least attractive smile (LAS). Data collected were analyzed for differences between gender, age, occupation, and education level as regards the evaluation of the MAS and LAS using the chi-square test with a significance level of α = 0.05. RESULTS: Statistical analysis showed that the smile images in L1 and L2 were equally considered to be the most attractive smiles. The chi-square test indicated no differences between all groups (P > 0.05). Percentages for the most attractive smiles for the lower lip positions were almost equal for most positions of the upper lip, with differences only between age groups (P > 0.05). The least attractive smiles were those with the upper lip position at 3 mm above the cervical line, with differences only between occupation groups (P < 0.001). CONCLUSION: The results of this study indicate that lightness of teeth positively affects smile attractiveness. Lower lip positions with a distance of 0 to 1 mm from the maxillary incisal line are considered more attractive. Upper lip distances were strongly associated with smile attractiveness. Gender, occupation, and education level did not differently affect the perception of attractiveness due to lower lip positions, but age did.


Assuntos
Estética Dentária , Dente , Adulto , Feminino , Humanos , Lábio , Maxila , Sorriso
5.
Artigo em Inglês | MEDLINE | ID: mdl-32233199

RESUMO

Excessive gingival display (EGD) is a common esthetic concern. Lip repositioning surgery (LRS) was introduced as one of the treatment options to manage EGD. LRS can be used for skeletally and/or muscularly induced EGD. The present case series applied LRS using an Er,Cr:YSGG laser to treat 24 patients with minor vertical maxillary overgrowth or a hypermobile lip. At 6 months, the gingival display had decreased by 3.79 ± 1.59 mm (mean ± standard deviation), and the visible lip body when smiling had increased by 1.23 ± 0.74 mm. A questionnaire revealed that the level of satisfaction with the smile increased among the patients and that they had a positive attitude toward Er,Cr:YSGG laser-assisted LRS.


Assuntos
Gengivectomia , Lasers de Estado Sólido , Estética Dentária , Humanos , Lábio , Sorriso
6.
Artigo em Inglês | MEDLINE | ID: mdl-32233201

RESUMO

Exposure of maxillary gingiva more than 3 mm while smiling is referred to as "excessive gingival display" or "gummy smile." Various treatment options for excessive gingival display are published in the literature, including lip repositioning, crown lengthening, botulinum toxin-A injections, and orthognathic surgeries. This case report aims to present a novel approach to the lip-repositioning procedure for treatment of excessive gingival display. The patient, who visited the department to demand a more esthetic smile, was diagnosed with excessive gingival display caused by hyperactivity of upper lip muscles. Lip repositioning procedure was considered. While evaluating the patient's smile, the amount of gingival display for each tooth region varied. A novel tooth-based modification was planned for the patient for a more precise result. No complication was noted during 10- and 30-day follow-ups. The amount of gingival display while smiling was less than 3 mm for each tooth region. The tooth-based lip-repositioning technique may provide an opportunity to more precisely treat patients with gummy smile.


Assuntos
Gengiva , Lábio , Estética Dentária , Gengivectomia , Humanos , Sorriso
7.
J Oral Rehabil ; 47(7): 862-871, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32275327

RESUMO

BACKGROUND: Quantitative clinical assessment tests for oral function have become popular in patient assessment; however, their comparability remains unclear. OBJECTIVE: To assess the reliability and comparability of pairs of different instruments for measuring maximum tongue pressure (MTP), chewing function (CF) and maximum lip force (MLF), and to analyse the influence of subjects' characteristics on the applied instruments. METHODS: Each pair of instruments, as well as a single device measuring the maximum voluntary bite force (MBF), was assessed across 26 healthy volunteers. The respective pairs of devices were compared using Bland-Altman plots and linear regression analysis. Furthermore, the influence of age, occlusal support zones, number of functional occlusal units, MBF, MTP and MLF were investigated as predictors on CF using a generalised estimating equation model. RESULTS: Neither the two assessments of CF, nor of MLF were correlated to each other, but there was a significant correlation between the assessments of MTP. Hue-Check Gum was able to demonstrate a significantly higher CF in younger compared to older individuals (P = .004) and individuals with high numbers compared to low numbers of occlusal units (P < .001). Those differences could not be demonstrated with the Vivident chewing gum. CONCLUSION: The absolute values of MTP assessed by the two applied devices cannot directly be compared, although normalised values may be directly comparable. Moreover, our observations suggest that the Hue-Check Gum was able to discriminate the effects of age and the number of occlusal units on CF. Our observations suggest that the two gums cannot be used interchangeably.


Assuntos
Lábio , Língua , Força de Mordida , Goma de Mascar , Humanos , Mastigação , Pressão , Reprodutibilidade dos Testes
9.
Beijing Da Xue Xue Bao Yi Xue Ban ; 52(2): 368-372, 2020 Apr 18.
Artigo em Chinês | MEDLINE | ID: mdl-32306024

RESUMO

OBJECTIVE: To measure the dimensional data of complete dentures and to design a novel tray for recording maxillomandibular relationship of edentulous patients. METHODS: For the measurement, 100 pairs of complete dentures from the clinic were surveyed for the following parameters: a1, the distance between the middle fossa of the upper left and right first molars; a2, the anterior-posterior distance between the middle fossa of the upper first molars and the incisal edge; a3, the width of the upper denture; a4, the anterior-posterior length of the upper denture; a51, the height from the mesio-lingual cusp of the right upper first molar to the saddle surface; a52, the height from the central fossa of the right lower first molar to the saddle surface; a6, the height from the notch of the upper lip frenulum to the upper central incisor edge; a7, the least thickness of the labial saddle base in the upper central incisor region. Based on the data, the trays with different sizes were designed and fabricated, and the key parameters were: b1, the distance between the foramina of screw posts, b2, the anterior-posterior distance between the foramina of the screw posts and the incisal edge; b3, the width of the tray; b4, the anterior-posterior length of the tray; b51, the height of the posterior platform with the screw nut; b52, the height of the screw post; b6, the height of the anterior tray handle; b7, the thickness of the anterior tray handle. RESULTS: The minimum, average and maximum data for each parameter were (in millimeter): a1: 37.1, 44.5, and 59.6; a2: 22.6, 29.0, and 38.1; a3: 48.5, 58.2, and 76.6; a4: 37.4, 50.8, and 61.0; a51: 5.6, 9.5, and 14.7; a52: 3.8, 9.9, and 18.8; a6: 8.9, 16.6, and 24.7; a7: 1.2, 2.8, and 5.9. Based on the data, the trays in small, medium and large sizes were designed and fabricated. In clinical application, the putty silicone rubber impression material was used to reline the tray, meanwhile the posterior platform and anterior tray handle were set as the occlusal plane, then the screw posts were added and adjusted till the proper vertical dimension, after that, the putty silicone rubber impression material was added around the screw posts to record the horizontal maxillomandibular relationship, finally, the anterior surface of the tray handle was used to record the midline of the face and lower edge of the upper lip at rest and with smile. CONCLUSION: The dimensional data offered reference for the analysis of restoration space in edentulous patients. The tray designed and fabricated in this study may serve as a new tool for recording the maxillomandibular relationship.


Assuntos
Prótese Total , Boca Edêntula , Técnica de Moldagem Odontológica , Humanos , Incisivo , Lábio , Dimensão Vertical
10.
Indian J Dent Res ; 31(1): 149-152, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32246699

RESUMO

Degloving injuries of the oral cavity are characterised by separation of periosteum and soft tissue of the anterior floor of the mouth from the inner cortex of the anterior segment. The higher incidence of the degloving injuries of mandible are seen in children and young adults due to higher involvement in contact sports. In elders, degloving injury of mandible are rare as compared to that of the limbs which are common. Here, we describe the case report of an elderly female with an apparent soft tissue abrasion with encrustation along the left side of the lower lip due to fall. Thorough intra oral examination revealed the presence of degloving injury along the lower anterior region of mandible which was debrided and sutured. Without a high level of suspicion, such lesions existing in the gingivobuccal sulcus may be missed, leading to increased risk of secondary infection and obligate healing in turn leading to increased morbidity.


Assuntos
Desenluvamentos Cutâneos , Lesões dos Tecidos Moles , Idoso , Criança , Feminino , Humanos , Lábio , Mandíbula , Cicatrização , Adulto Jovem
11.
Am J Orthod Dentofacial Orthop ; 157(3): 340-347, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32115112

RESUMO

INTRODUCTION: This study aimed to evaluate the effect of the relationship between maxillary incisors and lower lip in conjunction with the maxillary gingival display on perception of smile attractiveness. METHODS: The frontal intraoral photograph of ideally aligned teeth was modified using image processing software. Twenty different smiles were obtained with a combination of 10 different maxillary incisor edge-lower lip distances and 10 different maxillary gingival display amounts. Attractiveness of these 20 smiles was evaluated by orthodontists (n = 101), dentists (n = 107), and laypersons (n = 105). Two-way ANOVA was used to compare alterations on smile esthetics, and repeated measures ANOVA was used to evaluate the interaction between the variables. Bonferroni-adjusted pairwise comparisons were applied for determining the differences between the rater groups. RESULTS: Maxillary incisor edge-lower lip distance (P < 0.01), maxillary gingival display amount (P < 0.001), and rater group (P < 0.01) had statistically significant influences on perception of smile attractiveness. Orthodontists prefer to see a minimal amount of mandibular incisor exposure and almost full crowns of maxillary central incisors. Dentists and laypersons are more tolerant of mandibular incisor exposure and maxillary central incisor coverage by the upper lip. None of the rater groups preferred the coverage of maxillary incisor edges or maxillary gingival display. CONCLUSIONS: Elimination of maxillary gingival display helps to improve smile attractiveness, whereas the coverage of maxillary incisor edges has a negative influence.


Assuntos
Estética Dentária , Incisivo , Lábio , Sorriso , Gengiva , Humanos
12.
PLoS One ; 15(3): e0230182, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32163487

RESUMO

BACKGROUND: How dental education influences students' dental and dentofacial esthetic perception has been studied for some time, given the importance of esthetics in dentistry. However, no study before has studied this question in a large sample of students from all grades of dental school. This study sought to fill that gap. The aim was to assess if students' dentofacial esthetic autoperception and heteroperception are associated with their actual stage of studies (grade) and if autoperception has any effect on heteroperception. METHODS: Between October 2018 and August 2019, a questionnaire was distributed to 919 dental students of all 5 grades of dental school at all four dental schools in Hungary. The questionnaire consisted of the following parts (see also the supplementary material): 1. Demographic data (3 items), Self-Esthetics I (11 multiple- choice items regarding the respondents' perception of their own dentofacial esthetics), Self-Esthetics II (6 Likert-type items regarding the respondents' perception of their own dentofacial esthetics), and Image rating (10 items, 5 images each, of which the respondents have to choose the one they find the most attractive). Both the self-esthetics and the photo rating items were aimed at the assessment of mini- and microesthetic features. RESULTS: The response rate was 93.7% (861 students). The self-perception of the respondents was highly favorable, regardless of grade or gender. Grade and heteroperception were significantly associated regarding maxillary midline shift (p < 0.01) and the relative visibility of the arches behind the lips (p < 0.01). Detailed analysis showed a characteristic pattern of preference changes across grades for both esthetic aspects. The third year of studies appeared to be a dividing line in both cases, after which a real preference order was established. Association between autoperception and heteroperception could not be verified for statistical reasons. CONCLUSION: Our findings corroborate the results of most previous studies regarding the effect of dental education on the dentofacial esthetic perception of students. We have shown that the effect can be demonstrated on the grade level, which we attribute to the specific curricular contents. We found no gender effect, which, in the light of the literature, suggests that the gender effect in dentofacial esthetic perception is highly culture dependent. The results allow no conclusion regarding the relation between autoperception and heteroperception.


Assuntos
Educação em Odontologia/normas , Estudantes de Odontologia/psicologia , Estudos Transversais , Feminino , Humanos , Hungria , Lábio/fisiologia , Masculino , Maxila/fisiologia , Faculdades de Odontologia/estatística & dados numéricos , Autoimagem , Sorriso/psicologia , Inquéritos e Questionários
14.
Dent Clin North Am ; 64(2): 341-349, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-32111273

RESUMO

Excessive gingival display or "gummy smile" is a growing concern to dental patients and often considered detrimental to an esthetic smile. Gingival display of more than 4 mm of gingiva is considered by many to be unattractive. The cause of the gummy smile can be multifactorial and must be accurately diagnosed to render appropriate treatment. Factors that contribute to the gummy smile include altered passive eruption, lip length, lip hypermobility, incisal wear/crown length, and vertical maxillary excess and gingival hyperplasia. The purpose of this article is to review the etiology, diagnosis, and surgical approaches in treating the gummy smile.


Assuntos
Estética Dentária , Lábio , Gengiva , Gengivectomia , Humanos , Sorriso
15.
BMC Infect Dis ; 20(1): 119, 2020 Feb 10.
Artigo em Inglês | MEDLINE | ID: mdl-32041552

RESUMO

BACKGROUND: Paracoccidioidomycosis is a neglected tropical disease, endemic in several countries of South America including Colombia. We report a case of a patient with Chronic Multifocal Paracoccidioidomycosis with long-standing symptoms and a delayed diagnosis caused by several barriers to achieve it. We did a review of the papers published in Colombia about this disease, focusing in clinical data and eco-epidemiology with the finding of a lack of new information on this topic since the 2000 in our region. CASE PRESENTATION: We present a 54-year-old man, farmer in his youth, with a chronic ulcerated lesion in the lower lip similar to a lip carcinoma, a deforming lesion in the nose, and respiratory symptoms with emphysematous lung. Lip biopsy with silver methenamine stain revealed small and large budding yeasts that resembles a "mariner's wheel" confirming Chronic Multifocal Paracoccidioidomycosis. He was treated successfully but subsequently lost to follow up. CONCLUSIONS: It is very important to focus attention, reinforce the search and create networks for the study of neglected tropical diseases. The presented case illustrates a usual clinical presentation, but with a delayed diagnosis due to the difficulties that still occur in some regions like ours for the early recognition of a case of chronic multifocal paracoccidioidomycosis.


Assuntos
Doenças Negligenciadas/diagnóstico , Paracoccidioidomicose/diagnóstico , Biópsia , Colômbia/epidemiologia , Diagnóstico Tardio , Humanos , Lábio/microbiologia , Lábio/patologia , Masculino , Pessoa de Meia-Idade , Doenças Negligenciadas/tratamento farmacológico , Doenças Negligenciadas/microbiologia , Doenças Negligenciadas/parasitologia , Paracoccidioidomicose/tratamento farmacológico , Paracoccidioidomicose/microbiologia , Paracoccidioidomicose/patologia
16.
Plast Reconstr Surg ; 145(3): 524e-529e, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-32097304

RESUMO

BACKGROUND: The depressor septi nasi is a facial muscle with many different descriptions of its anatomy. Therefore, the aim of this study was to clarify the relationship of the depressor septi nasi, incisivus labii superioris, and surrounding structures. METHODS: Twenty sides from 10 fresh-frozen cadaveric heads were used in this study. The depressor septi nasi and incisivus labii superioris were dissected intraorally and extraorally, and the relationship with surrounding structures was observed. RESULTS: Eighteen of 20 sides had a depressor septi nasi. When present, the depressor septi nasi originated from the orbicularis oris above the central incisor and the medial portion of the inferior part of the incisivus labii superioris and inserted into the base of the medial crus of the major alar cartilage and nasal septum. These three muscles were three-dimensionally fused at the insertion point of the depressor septi nasi. There was no specimen where the depressor septi nasi originated directly from the maxilla. The depressor septi nasi runs obliquely from the nasal septum and the base of the medial crus of the major alar cartilage to the orbicularis oris and inferior part of the incisivus labii superioris. CONCLUSION: A better understanding of the depressor septi nasi, incisivus labii superioris, and surrounding structures might be important during various surgical techniques, especially rhinoplasty.


Assuntos
Músculos Faciais/anatomia & histologia , Lábio/anatomia & histologia , Septo Nasal/anatomia & histologia , Rinoplastia/métodos , Idoso , Idoso de 80 Anos ou mais , Cadáver , Músculos Faciais/cirurgia , Feminino , Humanos , Incisivo/anatomia & histologia , Lábio/cirurgia , Masculino , Pessoa de Meia-Idade , Septo Nasal/cirurgia
17.
Plast Reconstr Surg ; 145(3): 606e-607e, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-32097328

RESUMO

Reconstruction of substantial-sized upper lip defects may require an Abbe flap reconstruction to avoid excessive tightness and deformity. The design of the Abbe or lip switch flap harvested from the lower lip is important for a satisfactory aesthetic and functional result. Harvest of the flap is performed to enable a definitive inset into the defect. The video that accompanies this article depicts rotation of an Abbe flap into a philtral defect created by basal cell carcinoma excision.


Assuntos
Carcinoma Basocelular/cirurgia , Neoplasias Labiais/cirurgia , Lábio/cirurgia , Cirurgia de Mohs/efeitos adversos , Procedimentos Cirúrgicos Reconstrutivos/métodos , Carcinoma Basocelular/patologia , Feminino , Humanos , Lábio/patologia , Neoplasias Labiais/patologia , Pessoa de Meia-Idade , Retalhos Cirúrgicos/transplante , Resultado do Tratamento
18.
Med Oral Patol Oral Cir Bucal ; 25(3): e370-e374, 2020 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-32040463

RESUMO

BACKGROUND: The objective of this study was to describe the upper and lower lip lesion occurrence in an oral diagnostic service. MATERIAL AND METHODS: Retrospective descriptive sectional study was performed. Clinical records were obtained from the archives of an Oral Diagnostic Service referral center between 2006 and 2016. Data such as gender, age, anatomical location, and diagnosis were collected and categorized. The collected data were submitted to a descriptive analysis and Pearson's chi-square test (p ≤ 0.05). RESULTS: A total of 587 patient records of lip lesions were analyzed. Most lesions were diagnosed in female (52.1%) and adults (56.9%) patients in the lower lip (76.2%). Among all lip lesions, the reactive/inflammatory lesions (n = 238; 40.5%) and oral potentially malignant disorders (n = 164; 28%) were the most frequent group lesions. Mucocele (n = 147; 25%), actinic cheilitis (n = 136; 23.1%) and vascular lesions (n = 51; 8.7%) were the most frequent lesion in the sample. Actinic cheilitis was significant in relation to gender (p < 0.001), all three most frequent lesions were significant in concerning to age group and anatomical site. CONCLUSIONS: Mucocele was the most common lower lip lesion in all age groups, followed by actinic cheilitis and vascular lesions, which mainly affected adults and the elderly.


Assuntos
Queilite , Neoplasias Labiais , Doenças da Boca , Adulto , Idoso , Serviços de Diagnóstico , Feminino , Humanos , Lábio , Estudos Retrospectivos
19.
Beijing Da Xue Xue Bao Yi Xue Ban ; 52(1): 107-112, 2020 Feb 18.
Artigo em Chinês | MEDLINE | ID: mdl-32071472

RESUMO

OBJECTIVE: To study the visual sensitivity threshold of physician's naked eye to the difference of nasolabial angle in edentulous jaw patients, and to provide a reference value for the study of aesthetic evaluation of soft tissue profile for the difference of nasolabial angle that can be recognized by human eyes. METHODS: Three-dimensional facial images of three edentulous patients with different diagnostic dentures introoral were obtained. Lateral screenshots of each patient's three-dimensional facial image with the same scale were obtained by using reverse engineering software (Geomagic studio 2014).The screenshot of the patient's three-dimensional facial image with suitable lip support (The suitable lip support was confirmed by both patients and prosthodontists who had clinical experience for more than 20 years) was taken as the reference picture, and the remaining pictures were grouped with it respectively. All the pictures were observed in random order by the subjects. Fifteen dentists were asked to judge the difference of nasolabial angle between the two pictures of each group on the computer screen. The difference of nasolabial angle between the two pictures in each group was measured and calculated. The ROC curve was drawn, and the best cut-off value was calculated as the visual sensitivity threshold. RESULTS: The data of the 15 subjects were used to draw ROC curves separately. The maximum and minimum best cut-off values were 5.55 degrees and 3.12 degrees respectively. The ROC curve of the whole 15 subjects was drawn after data aggregation, and the best cut-off value was 5.36 degrees (AUC=0.84>0.5, P=0.000<0.05). When the difference of nasolabial angle was above 5.36 degrees, the subjects could recognize it effectively. CONCLUSION: There is a visual limit in the observation of the nasolabial angle with the naked eye. In this study, a visual sensitivity threshold of 5.36 degrees for the difference of the nasolabial angle was obtained. The difference of nasolabial angle below this value can be regarded as no clinical significance. This result provides a reference value for human eyes to recognize the difference of nasolabial angle in soft tissue profile aesthetic evaluation. It can be applied to the aesthetic evaluation of soft tissue profile and can be used as the error level of related research with nasolabial angle as an index for accuracy evaluation.


Assuntos
Arcada Edêntula , Nariz , Estética , Face , Humanos , Lábio , Acuidade Visual
20.
Mymensingh Med J ; 29(1): 149-155, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31915351

RESUMO

Reconstruction of total lip is a challenging task for a plastic surgeon. It becomes more complicated when there is loss of additional tissues like angle of mouth, buccal mucosa or floor of the mouth. Radial forearm flap with palmaris longus tendon provides an easier but reliable technique for three dimensional lip reconstructions with good functional and aesthetic outcome. In this short observational series we included 5 patients of total lip reconstruction and conducted at Sylhet MAG Osmani Medical College Hospital and Private Clinic of Sylhet, Bangladesh from January 2014 to December 2017. Among these one was a case of basal cell carcinoma of upper lip and rest was squamous cell carcinoma of lower lip. The mean age was 71 years. All the flaps survived and patients had normal speech and oral continence. Composite radial forearm flap with palmaris longus tendon is a good, reliable option for total lip reconstruction.


Assuntos
Retalhos de Tecido Biológico , Lábio/cirurgia , Procedimentos Cirúrgicos Reconstrutivos/métodos , Idoso , Bangladesh , Antebraço , Humanos , Neoplasias Labiais/cirurgia , Pessoa de Meia-Idade , Neoplasias Bucais/cirurgia , Tendões , Resultado do Tratamento
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