Journal of Craniofacial Surgery最新文献

Objective: Finite element analysis (FEA) of the biomechanical properties of the modified extraoral distractor device used in the mandibular distraction of craniofacial microsomia patients.

Materials and methods: Finite element analysis (FEA) models of 5 patients under 2 working conditions, the instance when the distractor is activated and when the distractor participates in mastication, were included in the current study. To conduct the FEA, load boundary conditions (35.6 N on the distractor for the first working condition and 50 N on the unoperated side, 100 N and 200 N on both sides for the second working condition) were applied. Besides, constraint boundary conditions and contact conditions were also applied.

Results: With 5 or 3 bioabsorbable screws fixing the upper fixing plate, the maximal displacement of the mandible was <3 mm and the maximal stress distributed on distractor and bioabsorbable screws was less than the yield strength of corresponding materials under the 2 working conditions when setting 50 N on the unoperated side and 100 N on both sides for the second working condition. However, when setting 200 N on both sides for the second working condition, the maximal displacement of the mandible slightly increased, and stress distributed on distractor and bioabsorbable screws exceeded the yield strength of corresponding materials in some patients.

Conclusion: In most cases, both 5 and 3 poly-L-lactic acidscrews could firmly fix the distractor on the mandible without plastic deformation, although the situation would be different when the mastication force was too powerful.

Purpose: To identify the key craniofacial anatomic characteristics associated with the prevalence of severe obstructive sleep apnea (OSA) in patient cohorts stratified by age and body mass index (BMI).

Methods: This prospective study was conducted at the Beijing Anzhen Hospital Center for Sleep Medicine and Science between December 2023 and March 2024. Patients suspected of having OSA underwent overnight polysomnography, along with computed tomography scans of the head and neck, to evaluate the skeletal and soft tissue characteristics. Multivariable analysis was conducted to explore the independent risk factors associated with the prevalence of severe OSA (apnea hypopnea index ≥30 events/h) after adjusting for age, sex, BMI, and neck circumference.

Results: Among the 118 participants, 75 (63.6%) were diagnosed with severe OSA. Skeletal variables, such as vertical airway length, and soft tissue-related variables, like soft palate length, were independently correlated with the prevalence of severe OSA. Furthermore, subgroup analysis revealed that all skeletal variables and a few soft tissue parameters were associated with severe OSA in patients aged older than 40 years, whereas only a specific soft tissue variable was independently associated with the occurrence of severe OSA in those aged younger than or equal to 40 years. In addition, certain soft tissue-related variables were notably associated with severe OSA in obese patients (BMI >28 kg/m2), whereas only specific skeletal variables were acted independent risk factors for severe OSA in non-obese patients (BMI ≤28 kg/m2).

Conclusion: Craniofacial skeletal and soft tissue features play essential roles in the prevalence of severe OSA, with variations observed based on age and BMI.

Background: To analyze the serial changes in cranial asymmetry (CA) during helmet therapy for deformational plagiocephaly (DP).

Methods: The subjects were 159 patients with DP who visited National Center for Child Health and Development between October 2011 and March 2014 and completed helmet therapy. The authors retrospectively collected information from medical records and analyzed the rate of improvement of deformation.

Results: The average age at the start of the helmet was 24.1 weeks old [standard deviation (SD): 5.0], and the average treatment period was 21.2 weeks (SD: 5.3). The average CA before the start of helmet therapy was 16.3 mm (SD: 4.2), and it improved to 7.7 mm (SD: 3.5) after therapy. The analysis in the present article was limited to 16 weeks after initiation of helmet therapy when 1/4 of patients completed the therapy. In general, improvement of CA occurred inverse proportionally to the enlargement of head circumference. In subgroup analysis, for those who started earlier than 24 weeks of age or those with the severity of Argenta 1 or 2, improvement occurred rapidly and reached nearly a plateau at 12 weeks of treatment. For those started later or those with more severe deformity, improvement occurred slower and it continued even after 12 weeks of treatment.

Conclusion: The rate of improvement was rapid at the early stage of treatment for those started earlier or with milder severity. This rapid improvement was obtained when the cranial enlargement was rapid. By understanding the course of improvement, evaluation of treatment responsiveness and ideal timing to finish therapy is possible.

This narrative review explores the various injection techniques utilized in facial filler procedures, emphasizing their applications, benefits, and potential complications. The increasing demand for total facial contouring and rejuvenation has led to a rise in the use of volumizing fillers and the integration of these procedures with other treatments such as toxins, threads, lasers, radiofrequency, and ultrasound. Achieving satisfactory results necessitates a comprehensive understanding of facial anatomy and the effects of aging on skin tissue. Key injection techniques discussed include retrograde and anterograde injections, linear and serial threading, serial puncture, fanning, cross-hatching, bolus, towering, sandwich, tenting, and specialized methods like fern leaf and duck walk injections. Each technique offers unique advantages, such as the retrograde technique's ability to minimize vascular complications and the dual plane technique's effectiveness in achieving optimal volumization and contouring by layering different types of fillers at varying depths. The dual-plane injection technique, in particular, is highlighted for its ability to provide natural and lasting results by combining firm fillers in deep layers with softer fillers superficially, minimizing surface irregularities and filler migration. The review also underscores the importance of preprocedure planning, including the marking of injection points to ensure precision, especially in patients with facial asymmetry. This comprehensive review aims to equip practitioners with the knowledge to select and master appropriate injection techniques, tailored to the specific needs of different facial areas, thereby enhancing treatment outcomes and patient satisfaction while minimizing risks.

The management of oral malignancy necessitates a comprehensive approach focusing on disease eradication and patient quality of life. Surgery remains pivotal, although extensive resection can lead to aesthetic and functional challenges. Reconstruction, often with osteocutaneous radial forearm free flaps (OCRFFF), is crucial for restoring form and function. Prophylactic plating aims to prevent donor site complications, although plate selection is critical. Despite OCRFFF's efficacy in anterior mandible reconstruction, concerns persist regarding donor site morbidity and adequacy for subsequent dental implantation. Collaborative efforts and advancements are essential to optimize outcomes and address limitations in oral cancer management.

Objective: Cervical burn scar contractures can be repaired using many modalities, including skin grafts, pedicled and free flaps. Although preexpanded cervical flaps can provide a like-with-like reconstruction, a simple advancement transfer of the flaps often fails to achieve ideal outcomes. The authors aimed to introduce a method using the preexpanded cervical flaps transferred in a scarf-wrapping manner to repair neck defects.

Methods: The surgery was divided into 2 stages. In the first stage of the surgery, an expander was implanted above the platysma muscle on each side of the neck. After adequate inflation of the expanders, second-stage operations commenced. Following the expander removal, one flap was rotated upward to repair the neck defect, whereas the other flap was rotated downward to repair the neck defect and close the donor site of the first flap. Data on patient demographics, clinical characteristics, and outcomes were also collected.

Results: Between July 2004 and May 2024, 24 patients underwent neck reconstructions using this method. Four patients had grade I cervical contractures, and 20 had grade II. The mean size of the defects was 15.62×5.75 cm (range: 6×6-18×10 cm). The average dimension of the neck flap was 15.02×7.65 cm (range: 9×6-20×10 cm). All the flaps survived with no perfusion-related complications. The average improvement in the cervico-mental angle was 29.25 degrees (range: 10-45 degrees). Postsurgery follow-up ranged from 4 to 155 months (mean: 22 mo). All patients and their families were satisfied with the outcomes.

Conclusions: Preexpanded cervical flaps transferred in a scarf-wrapping manner can be used to reconstruct grade I and II cervical scar contractures and provide a like-with-like reconstruction of the neck.

Objectives: In this study, we retrospectively examined the bleeding that occurred in the 5-year patient series.

Materials and methods: One thousand seven hundred seventy-five patients who underwent septorhinoplasty surgery between 2019 and 2023 were included in the study, and 28 of these patients who presented with bleeding complications were examined. All patients underwent open-technique septorhinoplasty surgery with or without concha intervention and were discharged the next day after overnight hospitalization.

Results: Of the 1775 patients included in the study, 1415 (79.7%) were female and 360 (20.3%) were male. Bleeding was observed in a total of 28 cases (1.6%). There was no difference regarding age or sex in patients with bleeding. It was also observed that concha intervention did not make a difference in terms of bleeding. The bleeding period ranged from 1 to 9 days, with an average period of 5.53 ± 2.36 days and a median bleeding period of 6 days. All bleeding patients were followed up with supportive treatment and were discharged after a 24-hour bleeding-free period. There was no need for interventions in the operating room or blood transfusions in for any patient.

Conclusion: Patients who present with bleeding after rhinoplasty can be observed, and their bleeding can be controlled without further intervention with supportive treatment and sufficient time.

Background: Postoperative infection is one of the main complications that affect the surgical effect of auricular reconstruction with tissue expansion. Understanding the susceptible time and distribution of pathogens is especially important for the treatment.

Method: The data of patients with infection after auricular reconstruction with tissue expansion from September 1, 2018 to August 30, 2024 were collected retrospectively. The microbe species identification results, diagnosis time of infection, surgical methods, and kinds of pathogenic bacteria were analyzed. Statistical methods were used to analyze and calculate the difference in infection time and the distribution of pathogenic bacteria.

Result: From September 1, 2018 to August 30, 2024, 237 cases of infection after auricle reconstruction with tissue expansion were diagnosed, and 252 strains of 18 kinds of pathogenic bacteria were detected. Among them, S. aureus (85 strains, 33.73%) and S. epidermidis (40 strains, 15.87%) were the 2 main pathogens. Postoperative infection mainly occurred in the first stage (72 cases, 30.38%) and the second stage (98 cases, 41.35%). The MRSA infection rate in the second stage (24.46%) was significantly higher than that in the other stages. The infection rate was significantly higher in winter (from November to January) (P<0.05). There was no significant difference among other seasons (P>0.05).

Conclusion: The main pathogen of infection after ear reconstruction with tissue expansion is Staphylococcus aureus, and winter is the peak period of infection. There are some differences in infection rate and distribution of pathogenic bacteria in different stages of surgery.

Introduction: Alcohol intoxication significantly increases an individual's risk for a variety of injuries including craniofacial injuries, although this research is limited to adults. Further research is needed on pediatric craniofacial injuries related to alcohol use in children, a group inherently different in anatomy and developmental considerations from adults. This study aims to identify alcohol-related craniofacial injury patterns, injury mechanisms, and patient disposition in the pediatric population presenting to the emergency department.

Methods: A cross-sectional analysis of alcohol-related injuries in the pediatric population (0-18 years of age) was performed using the National Electronic Injury Surveillance System (NEISS) database from 2019 to 2023. Patient demographics, specific primary and secondary injury diagnoses, injury mechanism, location, and discharge disposition were collected. Descriptive statistics and χ2 tests were used to understand injury patterns.

Results: A total of 266 patients with alcohol-related craniofacial injuries were identified, with an age range of 12 to 18 years. The most common craniofacial injuries were brain injury, facial laceration, and concussions. Additional injuries occurred in most patients and were often either poisoning or an additional craniofacial injury. Injury mechanisms included falls, motorized and non-motorized recreational vehicles, motor vehicle collisions, and others. Although most patients were discharged from the emergency department, some required transfer or admission, particularly those with brain injuries or fractures.

Conclusion: This study evaluates pediatric craniofacial injuries involving alcohol. Falls emerged as the most common injury mechanism, and most injuries occurred in older adolescents. This population had high rates of brain injury and concomitant injuries, highlighting the significant morbidity present.

Lip augmentation has become one of the most popular esthetic procedures globally, driven by societal standards that equate full lips with youth and sensuality. While young individuals often seek volume enhancement for lip beautification, older adults pursue lip rejuvenation to counter aging effects, such as volume loss, fine lines, and reduced definition. A range of techniques has been developed to meet these esthetic goals, but achieving natural and safe results remains a challenge. This study evaluates the single-point technique (SPT), a novel approach for lip augmentation that utilizes a single injection point to reshape and enhance the lips while prioritizing vascular safety. Single-point technique applies linear retrograde injections to project, define, and evert the lips with minimal trauma. Two cases of M-shaped lips demonstrate the effectiveness of SPT in achieving balanced, esthetically pleasing results with lasting effects beyond 6 months. Through a detailed review of lip anatomy, filler selection, and injection techniques, this paper presents SPT as a refined approach for practitioners seeking optimal, natural lip enhancement outcomes.