The Use of Allogeneic Cartilage for Grafting in Functional and Reconstructive Rhinoplasty

Advantages and Disadvantages of Reconstructive and Preservation Rhinoplasty: Surgical Techniques, Outcomes, and Future Directions

Reconstructive rhinoplasty, a specialized surgical procedure, aims to restore both the form and function of the nose, particularly after trauma, congenital defects, or prior surgeries. This review evaluates the advantages and disadvantages of various surgical techniques used in reconstructive and preservation rhinoplasty. The study focuses on the outcomes of commonly employed methods such as cartilage grafting, flap techniques, and alloplastic materials, assessing both functional and aesthetic results. Recent advancements, including 3D imaging, tissue engineering, and artificial intelligence, are discussed as potential future directions that could enhance surgical precision, safety, and patient care. The review systematically examines clinical studies from the past decade, highlighting the evolving landscape of rhinoplasty and its impact on patient outcomes.

Fresh Frozen, In-Alcohol, or Autologous Costal Cartilage? Analysis of Complications in Over 650 Revision Rhinoplasties

BACKGROUND

When there is insufficient autologous septal cartilage for graft sculpting in revision rhinoplasty, valid alternatives need to be found. Both autologous and homologous costal cartilage usage has been described in the literature. As there is no universally accepted consensus on cartilage choice, experience with different types of cartilage assumes significant importance in the rhinoplasty learning process.

OBJECTIVES

This multicenter prospective study outlined an overview of the authors' experience regarding short-term and long-term complications following revision rhinoplasty procedures in which either fresh frozen (FFCC), in-alcohol (IACC), or autologous costal cartilage (ACC) was used.

METHODS

A total of 671 patients undergoing revision rhinoplasty between June 2015 and September 2020 were divided into 3 groups according to the type of cartilage used (Group 1, 212 patients with FFCC; Group 2, 239 patients with IACC; Group 3, 202 patients with ACC). Sociodemographic and clinical characteristics and short- and long-term complications were described and discussed. A statistical analysis investigating a possible significance of the differences in complication rates was conducted.

RESULTS

The data obtained indicated a short-term general complication rate of 5.05%, and a long-term complication rate of 7.04%. A statistically significant difference was identified in cartilage warping rate between the homologous cartilages in comparison to ACC.

CONCLUSIONS

FFCC, IACC, and ACC can be safely used in revision rhinoplasty with no statistically significant differences regarding short- and long-term complication rates. Cartilage warping rate is significantly higher for ACC compared with FFCC and IACC.

LEVEL OF EVIDENCE: 2

Development and Characterization of Heparin-Containing Hydrogel/3D-Printed Scaffold Composites for Craniofacial Reconstruction

Regeneration of cartilage and bone tissues remains challenging in tissue engineering due to their complex structures, and the need for both mechanical support and delivery of biological repair stimuli. Therefore, the goal of this study was to develop a composite scaffold platform for anatomic chondral and osteochondral repair using heparin-based hydrogels to deliver small molecules within 3D-printed porous scaffolds that provide structure, stiffness, and controlled biologic delivery. We designed a mold-injection system to combine hydrolytically degradable hydrogels and 3D-printed scaffolds that could be employed rapidly (< 30 min) in operating room settings (~23 °C). Micro-CT analysis demonstrated the effectiveness of our injection system through homogeneously distributed hydrogel within the pores of the scaffolds. Hydrogels and composite scaffolds exhibited efficient loading (~94%) of a small positively charged heparin-binding molecule (crystal violet) with sustained release over 14 days and showed high viability of encapsulated porcine chondrocytes over 7 days. Compression testing demonstrated nonlinear viscoelastic behavior where tangent stiffness decreased with scaffold porosity (porous scaffold tangent stiffness: 70%: 4.9 MPa, 80%: 1.5 MPa, and 90%: 0.20 MPa) but relaxation was not affected. Lower-porosity scaffolds (70%) showed stiffness similar to lower ranges of trabecular bone (4-8 MPa) while higher-porosity scaffolds (80% and 90%) showed stiffness similar to auricular cartilage (0.16-2 MPa). Ultimately, this rapid composite scaffold fabrication method may be employed in the operating room and utilized to control biologic delivery within load-bearing scaffolds.

3D Bioprinting of Hyaline Cartilage Using Nasal Chondrocytes

Due to the limited self-repair capacity of the hyaline cartilage, the repair of cartilage remains an unsolved clinical problem. Tissue engineering strategy with 3D bioprinting technique has emerged a new insight by providing patient's personalized cartilage grafts using autologous cells for hyaline cartilage repair and regeneration. In this review, we first summarized the intrinsic property of hyaline cartilage in both maxillofacial and orthopedic regions to establish the requirement for 3D bioprinting cartilage tissue. We then reviewed the literature and provided opinion pieces on the selection of bioprinters, bioink materials, and cell sources. This review aims to identify the current challenges for hyaline cartilage bioprinting and the directions for future clinical development in bioprinted hyaline cartilage.

Balancing beauty and science: a review of facial implant materials in craniofacial surgery

Facial reconstruction and augmentation, integral in facial plastic surgery, address defects related to trauma, tumors infections, and congenital skeletal deficiencies. Aesthetic considerations, including age-related facial changes, involve volume loss and diminished projection, often associated with predictable changes in the facial skeleton. Autologous, allogeneic, and alloplastic implants are used to address these concerns. Autologous materials such as bone, cartilage, and fat, while longstanding options, have limitations, including unpredictability and resorption rates. Alloplastic materials, including metals, polymers, and ceramics, offer alternatives. Metals like titanium are biocompatible and used primarily in fracture fixation. Polymers, such as silicone and polyethylene, are widely used, with silicone presenting migration, bony resorption, and visibility issues. Polyethylene, particularly porous polyethylene (MedPor), was reported to have one of the lowest infection rates while it becomes incorporated into the host. Polyether-ether-ketone (PEEK) exhibits mechanical strength and compatibility with imaging modalities, with custom PEEK implants providing stable results. Acrylic materials, like poly-methylmethacrylate (PMMA), offer strength and is thus mostly used in the case of cranioplasty. Bioceramics, notably hydroxyapatite (HaP), offer osteoconductive and inductive properties, and HaP granules demonstrate stable volume retention in facial aesthetic augmentation. Combining HaP with other materials, such as PLA, may enhance mechanical stability. 3D bioprinting with HaP-based bioinks presents a promising avenue for customizable and biocompatible implants. In conclusion, various materials have been used for craniofacial augmentation, but none have definitively demonstrated superiority. Larger randomized controlled trials are essential to evaluate short- and long-term complications comprehensively, potentially revolutionizing facial balancing surgery.

Complications and Treatments of Pseudomonas aeruginosa Infection After Rhinoplasty With Implants: A Clinical Study

BACKGROUND

Pseudomonas aeruginosa is an opportunistic pathogen, and because of its specificity, its treatments appear tricky in postrhinoplasty infections with internal implants. This study summarizes the clinical characteristics and treatment of this type of infections to provide some reference for clinical work.

METHODS

We retrospectively analyzed 10 patients who were diagnosed with a nasal infection of P. aeruginosa after implant nasal augmentation. The results of the bacterial culture and drug sensitivity test of the patients' wound secretions were summarized and analyzed. We summarized the characteristics of the patients' infection and the treatments, and we also summarized the patients' prognosis.

RESULTS

In these 10 cases, their implants included rib cartilage and ear cartilage alone, as well as their own cartilage combined with expanded polytetrafluoroethylene and silicone. All patients developed wound infections within 1 month after rhinoplasty, with bacterial cultures of P. aeruginosa . Prolonged use of sensitive antibiotics, as well as wound dressing changes, failed to keep the infection well under control. Patients whose implant was removed and thoroughly debrided within 1 week of infection did not experience any serious complications. In patients who were infected for >1 week before surgery to remove the implants, complications such as nasal column necrosis and nasal contracture occurred, and later the nasal repair was performed after multiple surgeries.

CONCLUSIONS

For bacterial infections in postrhinoplasty wounds with implants, we recommend early bacterial culture. If the infection is clearly P. aeruginosa , the implant should be removed and thoroughly debrided as soon as possible to avoid serious complications.

LEVEL OF EVIDENCE

Level IV.

Update on Rhinoplasty Research Trends: A Bibliometric Analysis

BACKGROUND

Rhinoplasty is one of the most commonly performed aesthetic surgical procedures. The current study aimed to use bibliometric analysis to qualitatively and quantitatively evaluate rhinoplasty research and determine the research trends and hotspots in this field.

METHODS

Publications on rhinoplasty research were extracted from the web of science core collection database. VOSviewer1.6.18 was used to analyze the co-authorship, co-occurrence, the citations of countries, institutions, authors, and hotspot keywords, and the journals in which the studies were published.

RESULTS

On April 8, 2022, 11,130 records of rhinoplasty research published between 1945 and 2021 were collected. Most of the retrieved studies were original research articles (n = 8309, 74.65%), and 1950 (17.52%) papers were available in an open-access format. The annual publication output increased annually. Research groups in the USA were the main contributors and had a strong academic reputation in this field. University of California System was the institution with the greatest contribution (4.17%, with 464 publications). Plastic and Reconstructive Surgery (1248 publications, 11.21%) published the most research in this field and was also the most frequently co-cited journal (33,894 citations, total link strength [TLS]: 722,672). R. J. Rohrich (140 publications) was the most prolific author and the most frequently co-cited author (2562 citations, TLS: 56,624). The following rhinoplasty research hotspots were identified: cleft rhinoplasty, nasal reconstruction, nasal tip, revision rhinoplasty, septorhinoplasty, nasal prosthesis, hyaluronic acid, and preservation rhinoplasty.

CONCLUSION

Our results provide a general overview of the major directions in rhinoplasty research. Preservation rhinoplasty, rib graft, nonsurgical rhinoplasty, hyaluronic acid, FACE-Q, fillers, and three-dimensional technology may be future research hotspots.

LEVEL OF EVIDENCE V

This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Cleft Rhinoplasty: Does Timing and Utilization of Cartilage Grafts Affect Perioperative Outcomes?

BACKGROUND

The purpose of this study was to evaluate the epidemiology and perioperative complications of different reconstructive strategies to correct cleft nasal deformity, with particular attention paid to type and timing of cartilage grafting.

METHODS

Retrospective cohort study was conducted of cleft rhinoplasty performed between 2012 and 2017 in North America utilizing the American College of Surgeons National Surgical Quality Improvement Program- Pediatric hospital network. Medical/surgical complications, reoperations, and readmissions within 30 days postoperatively were analyzed with appropriate statistics.

RESULTS

During the study interval, 3317 pediatric patients underwent cleft rhinoplasty, with 8.0% involving the use of cartilage grafts. Ear cartilage was significantly more commonly used for intermediate repair, whereas rib cartilage was more commonly used for late repair (P=0.006). Overall, rhinoplasties with ear cartilage grafts had shorter procedure durations than those without cartilage grafts (P=0.005), whereas those with rib cartilage grafts had increased procedure duration (P<0.001). The use of cartilage grafts was not associated with increased complications in either intermediate or late cleft rhinoplasty. Patients with bilateral clefts were more likely to undergo rhinoplasty with cartilage grafts overall (P=0.047) and with cartilage grafts for late reconstruction (P=0.039).

CONCLUSIONS

Ear cartilage is most frequently utilized for intermediate repair, whereas rib cartilage is most frequently utilized for late repair during cleft rhinoplasty. Ear cartilage grafts are associated with significantly decreased procedure duration, whereas rib cartilage grafts are associated with significantly increased procedure duration. Not surprisingly, cleft rhinoplasty is relatively safe, with a 2% overall short-term complication rate.

The Use of Autologous and Cadaveric Grafts in Rhinoplasty: A Survey Study

BACKGROUND

Both autologous and cadaveric grafts are often used during rhinoplasty to create volume and provide support. Despite discussion in the literature comparing the efficacy, cost-effectiveness, and complication rates between grafting options, it remains unclear which is the superior choice when considering availability, donor site morbidity, and cost. There is a little description of the current use of these materials amongst facial plastic surgeons.

METHODS

A 12 question survey was created, and IRB approval was obtained. The survey was distributed to practicing members of the AAFPRS via their membership listserv.

RESULTS

178 respondents completed the survey for an overall response rate of 17.5%. The most common rhinoplasty graft types used by respondents were autologous septal cartilage (96.6%), autologous auricular grafts (93.8%), autologous rib graft (ARG) (75.8%), and cadaveric rib graft (CRG) (56.7%). Patient comorbidities and performing more than 50 rhinoplasties per year were positively correlated with use of CRG grafts and concerns about complications and cost were negatively correlated.

CONCLUSIONS

While autologous septal and auricular cartilage remain the most common graft choices amongst surveyed facial plastic surgeons, a majority utilize cadaveric rib grafts in their practice. Patient comorbidities, surgery volume, concerns about graft complications, and cost were the chief factors associated with use of cadaveric grafts amongst survey respondents.

LEVEL OF EVIDENCE V

This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Cost Utility Analysis of Costal Cartilage Autografts and Human Cadaveric Allografts in Rhinoplasty

BACKGROUND

Human cadaveric allograft (HCA) and costal cartilage autograft (CCA) have been described for reconstruction during rhinoplasty. Neither are ideal due to infection, resorption, and donor site morbidity. The clear superiority of 1 graft over the other has not yet been demonstrated. This study assesses comparative costs associated with current grafting materials to better explore the cost ceiling for a theoretical tissue engineered implant.

MATERIALS AND METHODS

A cost utility analysis was performed. Initial procedure costs include physician fees (CPT 30420), hospital outpatient prospective payments, ambulatory surgical center payments, and fees for the following: rib graft (CPT 20910), hospital observation, and DRG (155) for inpatient admission. Additional costs for revision procedure, included the following fees: physician (CPT 30345), rib graft, hospital outpatient prospective payment, and ambulatory surgical center payments. Total costs under each scenario were calculated with and without the revision procedure. Comparison of total costs for each potential outcome to the estimated health utility value allowed for comparison across rhinoplasty subgroups.

RESULTS

The mean cost of primary outpatient rhinoplasty using HCA and CCA were $8075 and $8342 respectively. Revision outpatient rhinoplasty averaged $7447 and increased to $8228 if costal cartilage harvest was required. Hospital admission increased the cost of primary rhinoplasty with CCA to $8609 for observational admission and to $13653 for 1 day inpatient admission. Revision CCA rhinoplasty with an inpatient admission complicated by pneumothorax increased costs to $21 099.

CONCLUSION

Cost of rhinoplasty without hospitalization was similar between HCA and CCA and this cost represents the lower limit of a practical cost for an engineered graft. Considering complications such as need for revision or for admission after CCA due to surgical morbidity, the upper limit of cost for an engineered implant would approximately double.

Cadaveric Costal Cartilage Grafts in Rhinoplasty and Septorhinoplasty: A Systematic Review and Meta-Analysis of Patient-Reported Functional Outcomes and Complications

ABSTRACT

Irradiated cadaveric costal cartilage (CC) has been utilized as an alternative to autologous cartilage (AC) in functional and aesthetic nasal surgery. The impact of graft choice between AC and CC on functional outcomes in rhinoplasty has yet to be studied. A systematic review was performed in PubMed, Embase, and Cochrane databases according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines to identify comparative studies evaluating the efficacy and safety of CC in nasal surgery. Functional and aesthetic outcomes and complications were reviewed and compared between AC and CC. Meta-analytic comparisons were performed when appropriate using data from comparative studies using a random-effects model. Four studies met inclusion criteria. The indication for surgery was functional in the majority of cases, and 34.6% of cases were revision rhino- or septorhinoplasties. Disparate data across studies prevented meta-analysis on functional outcomes; however, qualitative review of function outcomes demonstrated comparable outcomes between the CC and AC groups. No differences in graft infection, warping, and resorption rates were detected. Analysis of all graft-related complications was higher in the CC group (P = 0.02); however, when AC donor site-related complications were included, no significance between the two groups was observed. In conclusion, limited, high quality data was available for analysis. Of the available studies, this systematic review suggest that the use of AC or CC may lead to comparable results in terms of functional outcomes. More long-term studies directly comparing AC and CC functional outcomes would be welcomed.

Efficacy and Safety of Lyophilized Articular Cartilage Matrix as an Injectable Facial Filler

OBJECTIVE

To evaluate the efficacy and safety of an injectable lyophilized articular cartilage matrix (LACM) which is in the form of cartilage powder that may increase the convenience of use and become unaffected by donor site morbidity as a potential filler.

METHODS

The safety test was conducted using 20 rabbits with an intravascular embolization model. Commonly used commercial hyaluronic acid (HA), acellular dermal matrix (ADM), polymethyl methacrylate (PMMA), and polylactic acid (PLA) products were selected for comparison of efficacy and adverse effect of LACM. The efficacy test was performed using 30 mice subcutaneous buttock-injection model. Gross assessments of the changes in size of injected materials and histological examinations were conducted.

RESULTS

Regarding the safety test, in one rabbit in the HA group, complete blurring occurred in the left eye, and necrosis of the posterior auricular artery was observed in one rabbit in the ADM group. In the ADM, severe ecchymosis around the injection sites was observed, and the bruises lasted longer than in the other groups. The LACM exhibited faster bruise resolution. Comparing the changes in size between weeks 4 and 12 in the mouse model, no significant changes in size were observed in the LACM (p = 0.359), HA (p = 0.421), and ADM (p = 0.097), but a significant change was observed in the PMMA (p = 0.001). In the histological examination, LACM exhibited well-demarcated margins with good biocompatibility.

CONCLUSION

The LACM shows potential as a facial filler according to the in vivo safety and efficacy tests LEVEL OF EVIDENCE V: This journal requires that authors assign a level of evidence to each submission to which Evidence-Based Medicine rankings are applicable. This excludes Review Articles, Book Reviews, and manuscripts that concern Basic Science, Animal Studies, Cadaver Studies, and Experimental Studies. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.

Septorhinoplasty and Septoplasty: Outcomes of a Large Cohort Using Autologous Versus Homologous Cartilage, 1999-2019

This study describes the complication rate and use of autologous and/or homologous cartilage in a large 20-year cohort of septo(rhino)plasty surgeries in a Dutch hospital, in relation to postoperative complications of septo(rhino)plasty surgery described in previous studies. A retrospective medical chart review was conducted. 2606 patients, mean age 34.7 (± 13.2) and 59.9% male, underwent primary or revision septo(rhino)plasty surgery from 01/01/1999 to 01/09/2019. Follow-up was known in 1384 of 2606 patients (53.1%) with a mean duration of 47.5 months. Complication registration was complete for 1774 patients. The overall complication rate was 270 out of 1774 (15.2%). The use of autologous costal cartilage (ACC) was a risk factor for overall complication with an odds ratio (OR) of 11.1 (95% CI 0.03-0.30; P < 0.01) as compared to 5.9 (95% CI 0.06-0.45; P < 0.01) when using homologous costal cartilage (HCC). Infections were more likely when ACC (5/26 [19.2%]) was used than when HCC (1/28 [3.6%]) was used. Notable resorption of cartilage was more likely when HCC (9/28 [32.1%]) was used than when ACC (1/26 [3.8%]) was used. Both the use of autologous costal cartilage grafts (OR 11.1) and homologous costal cartilage grafts (OR 5.9) lead to an increased risk of complications. When choosing cartilage type for reconstruction in septo(rhino)plasty, it should be taken into account that both ACC and HCC are associated with a higher risk of complications. LEVEL OF EVIDENCE IV: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Comparing autologous versus allogenic rib grafting in pediatric cleft rhinoplasty

BACKGROUND

Patients with cleft lip with or without cleft palate suffer from varying degrees of nasal deformity, often requiring nasal reconstruction to provide improved form and function. Rib cartilage is an excellent source of grafting material for nasal reconstruction and is available either as an autologous or allogenic graft. There is a paucity of literature comparing outcomes of autologous and allogenic rib grafts in pediatric cleft rhinoplasty.

METHODS

A retrospective chart review was performed on patients who underwent cleft rhinoplasty with autologous or allogenic rib grafting at a tertiary pediatric hospital between January 1, 2003 and December 31, 2017. Outcome data were gathered over a 6-month postoperative period.

RESULTS

There were 23 cleft rhinoplasties performed with rib graft, 12 with autologous rib and 11 with allogenic rib. Those in the autologous group tended to be older than those in the allogeneic group (15.6 ± 4.4 v 12.4 ± 5.2 years, p = 0.13). The most common types of grafts used were columellar strut (20/23), shield graft (9/23), and unilateral or bilateral batten grafts (7/23). Length of stay was significantly longer for patients who underwent autologous rib grafting compared with those with allogenic rib grafting (25.8 ± 4.7 v 11.9 ± 7.2 h, p < 0.05). Each group reported one complication.

CONCLUSION

Autologous and allogenic rib grafts are safe and effective in pediatric rhinoplasty. The most common grafts used in this sample were columellar strut, batten, and shield grafts. Autologous rib grafts were more likely to be used in older patients and require longer hospital stay compared to allogenic grafts.

Autologous costochondral graft harvest in children

INTRODUCTION

Autologous costochondral grafting is a commonly employed technique in pediatric otolaryngology for reconstructing a cartilaginous or bony structure, such as the trachea, larynx, nose or mandible by harvesting rib cartilage or bone from the same patient. Complications include infection, pneumothorax, hematoma, scarring, and pleural leak, and the literature regarding these complication rates in pediatric patients undergoing this procedure is sparse. The objective of this study was to determine the donor site complication rate associated with rib graft harvest procedures performed by pediatric otolaryngologists in infants and children and to compare this to established complication rates reported in adults.

METHODS

A retrospective cohort study was performed, examing the charts of 33 patients who underwent airway, mandible, nose, or external ear reconstruction by means of autologous rib grafting between 2010 and 2018 at an urban tertiary medical center in Boston, Massachusetts. All patients were under the age of 18 years old and had undergone rib harvest and subsequent airway, mandible, nose, or external ear reconstruction by two pediatric otolaryngologists.

RESULTS

Of these, 20 were female and 13 were male, with a mean age of 2.5 years at date of surgery. No patients were excluded. A total of 41 costochondral graft harvests from a total of 36 incision sites were included. Pooled donor site complication incidences were 1 intraoperative pleural leak (2.8%) and 1 incision site infection (2.8%). Drains were not utilized postoperatively; there were no incidences of postoperative hematoma or seroma. No outside specialty consults were necessary to manage these. There were 2 instances of hypertrophic scarring, both developing in patients who underwent skin excisions for skin graft harvest or scar excision from the same incision used for graft harvest (5.6%).

CONCLUSIONS AND RELEVANCE

Autologous rib grafting amounts to a simple, extrapleural chest wall procedure, which may be safely performed in children by pediatric otolaryngologists with acceptably low complication rates.