Nasal Septal Perforation Reconstruction with Polydioxanone Plate: A Systematic Review.

Nasal septal perforation is an uncommon pathology that is difficult to surgically repair and may significantly impact patients' quality of life. Existing treatments have high complication and failure rates. The use of polydioxanone (PDS) plates to repair septal perforations is an innovative approach that has demonstrated superior outcomes to the conventional techniques. This study aimed to review the literature on PDS plates for nasal septal perforation reconstruction. PubMed, OVID Medline, and OVID Embase databases were searched for relevant articles in June 2021. Search terms included nasal septal perforation, polydioxanone, septal perforation, septal repair, nasal septum, and PDS plate. The Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines were adhered to for this systematic review. Database searches yielded 80 articles. Seven articles were included representing 74 patients. All studies reported the use of PDS plates in addition to other materials. They all reported closure rates of at least 80%. The majority of studies reported no postoperative complications. Nasal septal perforation reconstruction with PDS plates is a promising approach that has demonstrated positive outcomes. Further larger studies are required to evaluate the long-term efficacy of using PDS plates on patients with septal perforations.

Perspectives of Facial Plastic Surgeons on Opioid Dependence in Rhinoplasty Patients.

Understanding the perspectives and opinions of facial plastic surgeons on opioid dependence is critical in a national epidemic of opioid overuse. Findings may encourage surgeon education so that facial plastic surgeons may be able to judiciously prescribe opioids, improving patient outcomes and reducing healthcare opioid-related spending. The objective of this study is to understand facial plastic surgeons' perspectives on opioid dependence in rhinoplasty patients. A key secondary objective was to quantify facial plastic surgeons' opioid prescribing patterns. This was a prospective survey study. A nine-question survey was sent to all members of the American Academy of Facial Plastic and Reconstructive Surgery in July of 2018, and analysis of the data was completed in August of 2018. The primary study outcome measurement was surgeon perspectives on opioid dependence. This was measured by an online survey. A total of 164 facial plastic surgeons responded to the survey (response rate: 6.6%). The majority were experienced surgeons in practice for more than 10 years (61.96%) who perform less than five rhinoplasties per week (84.15%). Of the facial plastic surgeons, 89.51% prescribe some variation of opioids following rhinoplasty. Most surgeons believe that opioid dependence is not a problem in rhinoplasty patients (86.96%), but that it is a problem among surgical patients in general (61.11%). The majority (52.45%) of surgeons prescribe between 11 and 25 tablets of opioids following rhinoplasty, with 25.17% of surgeons prescribing > 25 tablets of opioids. Facial plastic surgeons do not believe opioid dependence to be a problem among rhinoplasty patients. Resultantly, many facial plastic surgeons can prescribe more than 25 tables of opioids following rhinoplasty. The findings suggest that facial plastic surgeons may require further education and complete more research regarding opioid dependence among the rhinoplasty population. Additionally, the findings are important for health policy in that they encourage the creation of rhinoplasty specific opioid prescription guidelines.

Combination of polyetherketoneketone scaffold and human mesenchymal stem cells from temporomandibular joint synovial fluid enhances bone regeneration.

Therapies using human mesenchymal stem cells (MSCs) combined with three-dimensional (3D) printed scaffolds are a promising strategy for bone grafting. But the harvest of MSCs still remains invasive for patients. Human synovial fluid MSCs (hSF-MSCs), which can be obtained by a minimally invasive needle-aspiration procedure, have been used for cartilage repair. However, little is known of hSF-MSCs in bone regeneration. Polyetherketoneketone (PEKK) is an attractive bone scaffold due to its mechanical properties comparable to bone. In this study, 3D-printed PEKK scaffolds were fabricated using laser sintering technique. hSF-MSCs were characterized and cultured on PEKK to evaluate their cell attachment, proliferation, and osteogenic potential. Rabbit calvarial critical-sized bone defects were created to test the bone regenerative effect of PEKK with hSF-MSCs. In vitro results showed that hSF-MSCs attached, proliferated, and were osteogenic on PEKK. In vivo results indicated that PEKK seeded with hSF-MSCs regenerated twice the amount of newly formed bone when compared to PEKK seeded with osteogenically-induced hSF-MSCs or PEKK scaffolds alone. These results suggested that there was no need to induce hSF-MSCs into osteoblasts prior to their transplantations in vivo. In conclusion, the combined use of PEKK and hSF-MSCs was effective in regenerating critical-sized bone defects.

Three-dimensionally printed polyetherketoneketone scaffolds with mesenchymal stem cells for the reconstruction of critical-sized mandibular defects.

OBJECTIVE: Additive manufacturing offers a tailored approach to tissue engineering by providing anatomically precise scaffolds onto which stem cells and growth factors can be supplied. Polyetherketoneketone (PEKK), an ideal candidate biomaterial, is limited by a poor implant-bone interface but can be functionalized with adipose-derived stem cells (ADSC) to promote integration. This in vivo study examined the interaction of a three-dimensional printed PEKK/ADSC implant within the critical-sized mandibular defect in a rabbit model. STUDY DESIGN/METHODS: Trapezoidal porous scaffolds with dimensions of 1.5 × 1.0 × 0.5 cm were printed using selective laser sintering. ADSCs were seeded on the scaffolds that were then implanted in marginal defects created in New Zealand rabbits. Rabbits were euthanized at 10- and 20-week intervals. Microcomputed tomography was used to characterize bone ingrowth and was correlated with histological analysis. Stress testing was performed on the scaffolds before and after implantation. RESULTS: All scaffolds were well integrated into adjacent bone. Bone-to-tissue volume increased from 30.34% ( ± 12.46) to 61.27% ( ± 8.24), and trabecular thickness increased from 0.178 mm ( ± 0.069) to 0.331 mm ( ± 0.0306) in the 10- and 20-week groups, respectively, compared to no bone regrowth on the control side (P < 0.05). Histology confirmed integration at the bone-implant interface. Biomechanical testing revealed a compressive resistance 15 times that of bone alone (P < 0.05) CONCLUSION: 3D-printed PEKK scaffolds combined with ADSCs present a promising solution to improve the bone-implant interface and increase the resistance to forces of mastication after mandibular reconstruction. LEVEL OF EVIDENCE: NA. Laryngoscope, 127:E392-E398, 2017.