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A modified technique for expanded polytetrafluoroethylene shaping in chin augmentation: parallel groove carving technique.

OBJECTIVE: In the current study, we restricted our focus on a modified approach to address the poor curved attachment of expanded polytetrafluoroethylenein chin augmentation. METHOD: The implant is shaped generally in accordance with the chin, followed by 5-to-8 longitudinally parallel "V"-grooves carved in the median of posterior site where the implant directly attaches to the mandible. Thus, it enhances bend ductility of the prosthesis and renders better attachment from the curved surface of prosthesis to the mandibular embedded region. RESULTS: This procedure was performed in 15 patients.…

Combined treatment with botulinum toxin and hyaluronic acid to correct unsightly lateral-chin depression.

With aging, anatomical changes are observed in the face. In the lower third, these changes are expressed as ptosis of the angle of the mouth, lip enhancement groove mentalis; decrease in concavity between the jaw and neck and very noticeable platysmal banding. The repeated contraction of muscles of the lateral-chin together with the band platysmal side form what are called a marionette groove. Treating the whole lateral-chin area can result in a more harmonious aspect of the face when compared with treatment of a marionette groove in isolation. In this paper we describe combined treatment of t…

Sexual dimorphism in skeletal browridge and chin morphologies determined using a new quantitative method.

Qualitative methods of describing sexual dimorphism in discrete cranial traits have been criticized for their subjectivity and statistical limitations. However, researchers have yet to be able to accurately capture the morphology of these individual traits using traditional metric techniques. This article presents a method to quantify morphological variation in the skeletal browridge and chin using 3D surface laser scans. Browridge and chin regions are isolated from the skull using objectively defined landmarks and planes. Region areas and volumes are used to quantify absolute and relative siz…

Immediate osseous genioplasty with Kirschner wire fixation for revision of infected alloplastic chin implant.

Genioplasty is a useful tool for correction of congenital abnormalities, as well as for aesthetic improvements of the lower face. Both allop … ate. We present here the unique case of a 65-year-old woman who presented with an infected silicone chin implant 25 years after her initial surgery. In this case, we chose to perform an immediate osseous genioplasty at the time of implant removal to avoid the problems that can arise from unpredictable soft tissue healing, as well as an untoward aesthet …

Numb chin syndrome as a manifestation of possible breast cancer metastasis around dental implants.

Numb chin syndrome, sometimes called numb lip syndrome, is an uncommon but well-recognized symptom in medical oncology. It may be a metastatic neurologic manifestation of malignancy, often with no clinically visible pathologic finding. The authors report a numb chin syndrome as a manifestation possible breast cancer metastasis around dental implants in a 69-year-old woman. The patient was presented with complaint of numbness in the lower jaw. Medical anamnesis revealed a metastatic breast carcinoma (CA). Radiographic imaging with conventional panoramic radiography and cone beam computed tomogr…

Head injury in facial impact--a finite element analysis of helmet chin bar performance.

The chin bar of a motorcycle helmet protects the rider from facial and head injuries. To evaluate the protective performance of chin bars against head injuries from facial impacts, an explicit finite element method was used to simulate the Snell Memorial Foundation test and a proposed drop test. The maximum acceleration and Head Injury Criterion (HIC) were employed to assess the impact-absorbing capability of the chin bar. The results showed that the proposed approach should be more practical than the Snell test, and provided more information for improving the chin bar design to protect agains…

Osseous remodeling after inferior border osteotomy for chin augmentation: an indication for early surgery.

PURPOSE: This study investigated the relationship of age at surgery and type of fixation to the pattern and extent of bone remodeling associated with inferior border osteotomy for chin augmentation. PATIENTS AND METHODS: Four groups of patients with similar chin advancement were established by age at the time of surgery: younger than 15, 15 to 19, 20 to 24, and older than 39 years. Cephalometric radiographs for immediate preoperative, immediate postoperative, and at least 9 months postoperative times were traced, digitized, and superimposed. RESULTS: The pattern of osseous remodeling was sim…

Vascular Occlusion Following Low-volume Chin Filler: Successful Management With High-dose Pulsed Hyaluronidase.

Vascular occlusion is an uncommon but serious complication of hyaluronic acid filler injections. If not recognized and managed early, it can lead to ischemia and even skin necrosis. Timely diagnosis and intervention are therefore crucial to minimize tissue damage and avoid long-term consequences. With the rising popularity of chin augmentation procedures, awareness of these rare complications is increasingly important for aesthetic practitioners. This report describes the case of a 54-year-old woman who presented with increasing pain, skin discoloration, and livedo reticularis approximately 24…

Surgical vs Non-surgical Chin Augmentation: A Systematic Review of Techniques Satisfaction, and Complications.

BACKGROUND: Chin augmentation is increasingly performed using both surgical (osseous genioplasty and alloplastic implants) and non-surgical (injectable fillers) techniques to improve facial harmony and profile. However, the long-term effectiveness, complication profiles, and patient satisfaction across these approaches remain incompletely characterized. METHODS: We conducted a systematic review registered in PROSPERO (CRD420251135340) and reported according to PRISMA guidelines. MEDLINE, PubMed, Web of Science, and Cochrane Library were searched from January 1975 to December 31, 2024, for Eng…

Борьба с травматической деформацией подбородка на чехле в недавно диагностированном миеломе: пример.

Обычно фонопатенты с множественной миеломой (ММ) управляются многодисциплинарными командами по онкологии в соответствии с неврологической, онкологической, механической и систематической системой принятия решений. Хирургия указывается на механическую нестабильность и/или неврологические недостатки. В неврологических и механически стабильных пациентах химиотерапия и радиотерапия часто являются основным лечением. 66-year-old Пациент мужского пола получил кифотическое повреждение подбородка на чехле из-за недиагностированной спинной мышцы ММ. Он испытывал постепенную боль в шее и трудности в повсе

Совпадение в аннотации оригинала
BackgroundPatients with multiple myeloma (MM) are commonly managed by multidisciplinary oncology teams in concordance with the neurological, … e are often the mainstay treatment.ObservationsA 66-year-old male patient presented with a kyphotic chin-on-chest deformity due to undiagnosed spinal MM. He experienced progressive neck pain and difficulty with activities of daily living (ADLs). Imaging revealed systematic bony element destruction and burst deformities at T1-2 with cervicothoracic cent …

Metastatic gallbladder cancer presenting as numb chin syndrome: A case report and literature review.

Gallbladder cancer (GBC) is an uncommon malignancy that is highly aggressive in the advanced stages. However, it rarely metastasizes to the mandible. Numb chin syndrome (NCS) is a rare neurological manifestation associated with various underlying causes, including occult primary cancers and distant metastases. It is often considered to be a significant indicator of malignancy, and thorough investigation is essential in the presence of unclear etiology. The current study reported on the case of a 69-year-old Japanese woman who presented with numbness and mild pain in the lower lip and chin area…

The prediction of sagittal chin point relapse following two-jaw surgery using machine learning.

The study aimed to identify critical factors associated with the surgical stability of pogonion (Pog) by applying machine learning (ML) to predict relapse following two-jaw orthognathic surgery (2 J-OGJ). The sample set comprised 227 patients (110 males and 117 females, 207 training and 20 test sets). Using lateral cephalograms taken at the initial evaluation (T0), pretreatment (T1), after (T2) 2 J-OGS, and post treatment (T3), 55 linear and angular skeletal and dental surgical movements (T2-T1) were measured. Six ML modes were utilized, including classification and regression trees (CART), co…

Prevalence and molecular analysis of glucose-6-phosphate dehydrogenase deficiency in Chin State, Myanmar.

Glucose-6-phosphate dehydrogenase (G6PD) deficiency is caused by X-linked recessive disorderliness. It induces severe anemia when a patient with G6PD deficiency is exposed to oxidative stress that occurs with administration of an antimalarial drug, primaquine. The distribution of G6PD deficiency remains unknown while primaquine has been used for malaria treatment in Myanmar. This study aimed to investigate the prevalence of G6PD deficiency and its variants in Chin State, Myanmar. Among 322 participants, 18 (11 males and 7 females) demonstrated a G6PD deficiency. Orissa variant was dominant in …

Orthodontic incisor retraction caused changes in the soft tissue chin area: a retrospective study.

BACKGROUND: To investigate the area and morphological changes around the soft tissue chin after orthodontic incisor retraction. METHODS: Fifty-nine female adults with bimaxillary protrusion requiring extraction of four premolars were included in the study. Cephalograms were taken before (T0) and after (T1) orthodontic treatment. The soft tissue changes, including the area, thickness and morphology were measured. Paired-t tests were performed for statistical comparisons. Pearson correlation analyses and backward multivariate regression analyses were used to identify the relationship between th…

Total lower lip and chin reconstruction with radial forearm free flap: A novel approach.

BACKGROUND: The management of large chin and lower lip defects is challenging due to this facial subunit's tremendous functional and aesthetic importance. Specific methods for total lower lip and mentum reconstruction are not well chronicled. Aesthetic and functional goals of this reconstruction include restoration of oral competence by maintaining lower lip height, vermilion reestablishment, color-matched skin introduction to the chin, sensation restoration, and ideally restoration of dynamic activity to the lower lip. METHODS: Literature review performed. RESULTS: Presentation of novel, tw…

Effect of three different chin-down maneuvers on swallowing pressure in healthy young adults.

OBJECTIVES/HYPOTHESIS: To determine the effects of three different chin-down maneuvers on swallowing pressure (SP) in healthy young adults using high-resolution manometry (HRM). STUDY DESIGN: Repeated measures with subjects serving as their own controls. METHODS: Twenty-six healthy subjects (average age 26.4 [range 21-35] years) swallowed 5 mL of cold water to examine the maximum swallowing pressure (MSP) at the velopharynx, meso-hypopharynx, and upper esophageal sphincter (UES), and to determine the duration of lowered SP at the UES using HRM. The subjects swallowed in the neutral position …

Comparisons of soft tissue chin thickness in adult patients with various mandibular divergence patterns.

OBJECTIVE: To evaluate the association between soft tissue at the chin (STC) thickness and mandibular divergence. MATERIALS AND METHODS: Nongrowing patients seeking orthodontic treatment (n  =  190; 113 women and 77 men), who had an average age of 26.94 years (range  =  18.10-53.50 years), were stratified in four subgroups based on cephalometric mandibular plane inclination to anterior cranial base (MP/SN): low  =  MP/SN ≤ 27° (n  =  48); medium-low  =  27° < MP/SN ≤ 32° (n  =  60); medium-high  =  32° < MP/SN < 37° (n  =  37); and high  =  MP/SN ≥ 37° (n  =  45). The STC thicknesses were mea…