Faculty Bibliography

BACKGROUND:Mandibular distraction osteogenesis is effective for the correction of severe tongue-based airway obstruction in infants with Pierre Robin sequence. Involved osteotomies may damage developing tooth buds and/or the inferior alveolar nerve. The authors evaluated the theoretical safety of various osteotomy techniques to better define infantile mandibular anatomy using computer-aided modeling. METHODS:Seven mandibular osteotomy techniques (oblique, inverted-L, multiangular, walking stick, high oblique, vertical/high inverted-L, and horizontal) were simulated using computed tomography studies from infants with Pierre Robin sequence and without other associated conditions. Software was used to manually segment the mandibular bone, inferior alveolar nerve, and tooth buds. RESULTS:Sixty-five computed tomography scans were included, yielding 130 hemimandibles. The horizontal osteotomy pattern had significantly lower theoretical risk of tooth bud (p < 0.001) and inferior alveolar nerve involvement (p < 0.001) than all other patterns. Osteotomies with high vertical components (i.e., vertical, walking stick, and multiangular) had lower theoretical tooth bud involvement than the more proximal oblique and inverted-L osteotomies (p < 0.001). Average lingula location was measured at a point 65 percent of the mandibular width from anterior mandibular border and 63 percent of the mandibular height from the inferior mandibular border. CONCLUSIONS:Surgical planning with computed tomography scans can help evaluate an infant's mandibular anatomy to select an osteotomy that reduces morbidity risks. Regardless of technique, tooth buds and the inferior alveolar nerve are often included in osteotomies. The lingula location in this study demonstrates a position more superior and posterior than that previously described. CLINICAL QUESTION/LEVEL OF EVIDENCE/METHODS:Therapeutic, V.

BACKGROUND:Nonsyndromic craniosynostosis is one of the most common anomalies treated by craniofacial surgeons. Despite optimal surgical management, nearly half of affected children have subtle neurocognitive deficits. Whereas timing and type of surgical intervention have been studied, the possibility of genetic influence on neurodevelopment in nonsyndromic craniosynostosis patients remains unexplored. METHODS:The authors performed whole-exome sequencing for 404 case-parent trios with sporadic nonsyndromic craniosynostosis. Statistical analyses were performed to assess the burden of de novo mutations in cases compared to both expectation and 1789 healthy control trios. Individuals with and without each mutation class were analyzed, and the presence or absence of various types of neurodevelopmental delay were recorded alongside demographic information. RESULTS:The authors identified a highly significant burden of damaging de novo mutations in mutation-intolerant [probability of loss of function intolerance (pLI) >0.9] genes in nonsyndromic craniosynostosis probands (p = 5.9 × 10-6). Children with these mutations had a two-fold higher incidence of neurodevelopmental delay (p = 0.001) and a more than 20-fold greater incidence of intellectual disability (p = 7.2 × 10-7), and were 3.6-fold more likely to have delays that persisted past 5 years of age (p = 4.4 × 10-4) in comparison with children with nonsyndromic craniosynostosis without these mutations. Transmitted loss of function mutations in high-pLI genes also conferred a 1.9-fold greater risk of neurodevelopmental delay (p = 4.5 ×10-4). CONCLUSIONS:These findings implicate genetic lesions concurrently impacting neurodevelopment and cranial morphogenesis in the pathoetiology of nonsyndromic craniosynostosis and identify a strong genetic influence on neurodevelopmental outcomes in affected children. These findings may eventually prove useful in determining which children with nonsyndromic craniosynostosis are most likely to benefit from surgical intervention. CLINICAL QUESTION/LEVEL OF EVIDENCE/METHODS:Risk, III.

BACKGROUND:Many patients have goals related to sexual health when seeking gender-affirming vaginoplasty, and previous investigations have only studied the ability to orgasm at cross-sectional timepoints. AIM/OBJECTIVE:Our aim is to quantify the time to orgasm postoperative gender-affirming vaginoplasty and describe potential correlative factors, including preoperative orgasm, to improve preoperative counseling. METHODS:A retrospective chart review was utilized to extract factors thought to influence pre and postoperative orgasm in patients undergoing robotic peritoneal flap vaginoplasty. Mean days to orgasm plus one standard deviation above that mean was used to define the time at which patients would be considered anorgasmic. OUTCOMES/RESULTS:Orgasm was documented as a categorical variable on the basis of surgeon interviews during pre and postoperative appointments while time to orgasm was measured as days from surgery to first date documented as orgasmic in the medical record. RESULTS:A total of 199 patients underwent surgery from September 2017 to August 2020. The median time to orgasm was 180 days. 178 patients had completed 1 year or greater of follow-up, and of these patients, 153 (86%) were orgasmic and 25 patients (14%) were not. Difficulty in preoperative orgasm was correlated only with older age (median age 45.9 years vs 31.7, P = .03). Postoperative orgasm was not significantly correlated with preoperative orgasm. The only factor related to postoperative orgasm was smoking history: 12 of 55 patients (21.8%) who had a positive smoking history and sufficient follow-up reported anorgasmia (P-value .046). Interventions for anorgasmic patients include testosterone replacement, pelvic floor physical therapy, and psychotherapy. CLINICAL IMPLICATIONS/CONCLUSIONS:Preoperative difficulty with orgasm improves with gender-affirming robotic peritoneal flap vaginoplasty, while smoking had a negative impact on postoperative orgasm recovery despite negative cotinine test prior to surgery. STRENGTHS & LIMITATIONS/UNASSIGNED:This investigation is the first effort to determine a timeline for the return of orgasmic function after gender-affirming vaginoplasty. It is limited by retrospective review methodology and lack of long-term follow-up. The association of smoking with postoperative orgasm despite universal nicotine cessation prior to surgery may indicate prolonged smoking cessation improves orgasmic outcomes or that underlying, unmeasured exposures correlated with smoking may be the factor inhibiting recovery of orgasm. CONCLUSION/CONCLUSIONS:The majority of patients were orgasmic at their 6-month follow-up appointments, however, patients continued to become newly orgasmic in appreciable numbers more than 1 year after surgery.

ABSTRACT/UNASSIGNED:Venous congestion accounts for most microvascular free tissue flaps failures. Given the lack of consensus on the use of single versus dual venous outflow, the authors present our institutional experience with 1 versus 2 vein anastomoses in microvascular free flap for head and neck reconstruction. A retrospective chart review was performed on all patients undergoing free flaps for head and neck reconstruction at our institution between 2008 and 2020. The authors included patients who underwent anterolateral thigh, radial forearm free flap, or fibula free flaps. The authors classified patients based on the number of venous anastomoses used and compared complication rates. A total of 279 patients with a mean age of 55.11 years (standard deviation 19.31) were included. One hundred sixty-eight patients (60.2%) underwent fibula free flaps, 59 (21.1%) anterolateral thigh, and 52 (18.6%) radial forearm free flap. The majority of patients were American Society of Anesthesiologists classification III or higher (N = 158, 56.6%) and had history of radiation (N = 156, 55.9%). Most flaps were performed using a single venous anastomosis (83.8%). Univariate analysis of postoperative outcomes demonstrated no significant differences in overall complications (P = 0.788), flap failure (P = 1.0), return to the Operating Room (OR) (P = 1.0), hematoma (P = 0.225), length of hospital stay (P = 0.725), or venous congestion (P = 0.479). In our cohort, the rate of venous congestion was not statistically different between flaps with 1 and 2 venous anastomoses. Decision to perform a second venous anastomoses should be guided by anatomical location, vessel lie, flap size, and intraoperative visual assessment.

Background/UNASSIGNED:Gender-affirming mastectomy has become one of the most frequently performed procedures for transgender and nonbinary patients. Although there are a variety of potential surgical approaches available, the impact of technique on outcomes remains unclear. Here we present our experience performing periareolar and double incision mastectomies, with a focus on comparing patient demographics, preoperative risk factors, and surgical outcomes and complication rates between techniques. Methods/UNASSIGNED:Retrospective review identified patients undergoing gender-affirming mastectomy by the senior author between 2017 and 2020. Patients were stratified according to surgical technique, with demographics and postoperative outcomes compared between groups. Results/UNASSIGNED:= 0.84) based on technique. Conclusions/UNASSIGNED:Our results demonstrate no difference in the rates of postoperative complications or revision procedures based on surgical technique. These results also suggest that with an experienced surgeon and proper patient selection, both techniques of gender-affirming mastectomy can be performed safely and with comparable outcomes.

INTRODUCTION/BACKGROUND:Reducing donor site morbidity after deep inferior epigastric artery perforator (DIEP) flap harvest relies mainly upon maintaining integrity of the anterior rectus sheath fascia. The purpose of this study is to describe our minimally-invasive technique for robotic DIEP flap harvest. METHODS:), respectively. Average follow-up was 6.31 months (range: 5.73-7.27 months). Robotic flap harvest was performed with intramuscular perforator dissection in standard fashion, followed by the transabdominal preperitoneal (TAPP) approach to DIEP pedicle harvest using the da Vinci Xi robot. Data was collected on demographic information, perioperative characteristics. Primary outcomes included successful flap harvest as well as donor site morbidity (e.g., abdominal bulge, hernia, bowel obstruction, etc.). RESULTS:All four patients underwent bilateral abdominally-based free flap reconstruction. Three patients received bilateral robotic DIEP flaps, and one patient underwent unilateral robotic DIEP flap reconstruction. The da Vinci Xi robot was used in all cases. Average flap weight and pedicle length were 522 g (range: 110-809 g) and 11.2 cm (range: 10-12 cm), respectively. There were no flap failures, and no patient experienced abdominal wall donor site morbidity on physical exam. CONCLUSION/CONCLUSIONS:While further studies are needed to validate its use, this report represents the largest series of robotic DIEP flap harvests to date and is a valuable addition to the literature.

Currently, there is an increasing trend in women seeking aesthetic flat closure after mastectomy. To date, there is no plastic surgery literature on specific techniques to achieve an aesthetic flat closure after mastectomy. As plastic surgeons, we need to continue to innovate and to iterate new surgical techniques in our reconstructive armamentarium to address the desires of and to optimize the outcomes for our reconstructive breast surgery patients. Herein, we seek to delineate key considerations and employed techniques for reconstructive plastic surgeons performing aesthetic flat closure after mastectomy. Namely, it is crucial to listen to the patient, and to fully understand the patient's concerns, wishes, and particular aesthetic desired. From a technical perspective, the key surgical pearls include completely obliterating the inframammary fold, ensuring the same size and flap thickness bilaterally, appropriately de-fatting medially on the chest wall to allow for a smooth contour, obviating any presence of dog ears medially or laterally with precise tissue excision, and confirming that the incisions are entirely symmetric bilaterally. Intraoperatively, it is important to sit these patients up to assess soft tissue re-draping, and to confirm that there are no dog ears nor any excess tissue that could compromise the perfectly flat aesthetic chest closure. With the increasing demand for flat closures after mastectomy, plastic surgeons need to be keen on employing modified surgical techniques to best optimize the desired aesthetic flat closure reconstructions for these patients, as these reconstructions are not simply linear closures.

OBJECTIVE:Step 1 will transition to a pass/fail system in 2022. This study aimed to characterize the effects of this change on integrated plastic surgery program directors' selection criteria and assess whether Step 2 Clinical Knowledge (CK) can replace Step 1 as an application selection metric. DESIGN/METHODS:Online survey that was administered to a collaborative group of ten plastic surgery program directors collecting USMLE Step 1, Step 2 CK, In-Service, and written board scores for 3 years of graduated integrated residents. SETTING/METHODS:Ten academic integrated plastic surgery programs. PARTICIPANTS/METHODS:Data from 80 graduated integrated plastic surgery residents. RESULTS:Across 80 included integrated residents, mean (SD) Step 1 score was 247 (13), Step 2 CK was 249 (13), PGY1-6 In-Service percentiles varied from 45 to 53 percentile, and written board pass rate was 98.3%. Both Step 1 and Step 2 CK correlated highly with In-Service percentiles (both p < 0.001), with Step 2 CK scores correlating similarly with In-Service performance compared to Step 1 (rho 0.359 vs. 0.355, respectively). Across applicant characteristics, program directors reported the highest relative increase in Step 2 CK importance after Step 1 transitions to pass/fail. CONCLUSIONS:Step 2 CK correlates similarly with plastic surgery In-Service performance compared to Step 1. While Step scores do not necessarily correlate with residency performance, Step 2 CK may also be used as an application screening metric for programs seeking objective data to differentiate plastic surgery applicants.

OBJECTIVE:The aim of this study was to examine effects of radiation therapy (RT) for head and neck cancer (HNC) on periodontal disease and relationships to caries. STUDY DESIGN/METHODS:A multicenter prospective observational cohort study (OraRad) was conducted in patients undergoing RT for HNC. Assessments were conducted by calibrated examiners at the pre-RT (baseline) visit (n = 533), the 12-month visit (n = 414), and the 24-month visit (n = 365). RESULTS:The average whole mouth mean (standard error (SE)) distance from the cementoenamel junction to the gingival margin (CEJ-GM) decreased significantly from 0.43 (0.04) mm at baseline to 0.24 (0.04) mm at 12 months and 0.11 (0.04) mm at 24 months (P ≤ .001). Whole mouth mean (SE) percentage of sites with CEJ-GM distance of <0 mm increased significantly from 23.3% (1.0%) at baseline to 28.5% (1.0%) at 12 months and 30.5% (1.1%) at 24 months (P ≤ .02). Higher mean radiation dose to the mandible was associated with a greater increase in the percentage of mandibular sites with CEJ-GM distance of <0 mm (P = .003). Both mean CEJ-GM distance and the percentage of sites with a CEJ-GM distance <0 mm were strongly associated with whole mouth mean proportion of decayed, missing, and filled surfaces, as well as proportion of decayed or filled facial/buccal surfaces specifically, (P < .001), with greater gingival recession associated with increased caries. CONCLUSIONS:RT for HNC leads to mandibular gingival recession in a dose-dependent manner. This gingival recession may contribute to increased risk for cervical caries seen in these patients.

Soft polymer nanoparticles designed to disassemble and release an antagonist of the neurokinin 1 receptor (NK₁R) in endosomes provide efficacious yet transient relief from chronic pain. These micellar nanoparticles are unstable and rapidly release cargo, which may limit the duration of analgesia. We examined the efficacy of stable star polymer nanostars containing the NK₁R antagonist aprepitant-amine for the treatment of chronic pain in mice. Nanostars continually released cargo for 24 h, trafficked through the endosomal system, and disrupted NK₁R endosomal signaling. After intrathecal injection, nanostars accumulated in endosomes of spinal neurons. Nanostar-aprepitant reversed mechanical, thermal and cold allodynia and normalized nociceptive behavior more efficaciously than free aprepitant in preclinical models of neuropathic and inflammatory pain. Analgesia was maintained for >10 h. The sustained endosomal delivery of antagonists from slow-release nanostars provides effective and long-lasting reversal of chronic pain.