Faculty Bibliography

LEARNING OBJECTIVES/OBJECTIVE:After studying this article, the participant should be able to (1) gather appropriate history and perform relevant physical exam maneuvers for head and neck complaints, (2) relate presenting complaints to differential diagnoses, (3) describe the appropriate workup for various head and neck complaints and presentations, and (4) perform clinical staging of head and neck tumors according to current guidelines. SUMMARY/CONCLUSIONS:Pediatric head and neck cancers are rare and complex, but plastic surgeons may play a crucial role in the multidisciplinary and multifaceted workup of a suspected malignancy. These cancers present unique diagnostic and therapeutic challenges given the unique anatomy, physiology, and developmental considerations in children compared to their adult counterparts. A comprehensive workup for pediatric head and neck malignancies is essential, starting with taking a thorough history and physical exam, followed by a well-considered and wide differential diagnosis. Appropriate imaging modalities and biopsy techniques are pivotal in obtaining an accurate diagnosis. Tumor and site-specific staging seek to provide essential information for guiding treatment planning. Plastic surgeons, therefore, must be informed and well versed in their evaluation and workup to best optimize patient outcomes.

OBJECTIVES/OBJECTIVE:To evaluate the reliability and failure modes of 3D-printed crowns fabricated from different resin composites compared to a milled resin composite block, all indicated as definitive restorations. METHODS:Four 3D-printing resins were evaluated: 1) CeramicCrown (CC; SprintRay), 2)VarseoSmile-Crown (VSC, Bego), 3) Crowntec (CRO, Saremco), and 4) Ceramage 3D-Printed (C3D, Shofu), along a milled resin-composite block: Shofu Block HC Super-Hard (SSH, Shofu). Eighteen implant-supported maxillary first-molar crowns were manufactured per group and tested under step-stress accelerated life testing. Weibull statistics were applied, and reliability was calculated for 100,000 cycles at different loads. Fractographic analysis was performed under scanning electron microscopy. RESULTS:All 3D-printed samples failed during fatigue testing, whereas SSH samples survived both the initial protocol and the extended cycling, in which the load profiles were modified to increase the number of cycles (up to 2400,000). Failures were related to material strength (C3D, CC, VSC) or fatigue damage accumulation (CRO). At a mission of 100,000 cycles at 300 N, all 3D printed groups presented high reliability (>99 %). Under higher loads (800-1000 N), CRO and VSC had lower reliability compared to C3D and CC. Characteristic fracture load was highest for C3D and CC, intermediate for CRO, and lowest for VSC. CRO showed the lowest Weibull modulus. Fractographic analysis indicated fracture initiation at the occlusal surface in printed crowns, propagating toward the margins and abutment. SSH crowns exhibited wear marks with no crack formation. SIGNIFICANCE/CONCLUSIONS:While the milled composite demonstrated superior fatigue resistance, 3D-printed definitive crowns exhibited material-dependent fatigue behavior. Among printed groups, CC and C3D presented higher characteristic fracture load and reliability under higher loads compared to CRO and VSC.

INTRODUCTION/BACKGROUND:Press-fit acetabular components achieve long-term fixation through osseointegration, yet the extent of bone ingrowth necessary for durable stability in well-functioning implants remains unclear. Postmortem retrievals provide a unique opportunity to directly assess the bone-cup interface in clinically successful total hip arthroplasties (THAs). This study evaluated osseointegration and biomechanical fixation strength in deceased-donor acetabular components to better define the characteristics of stable long-term fixation. METHODS:Cadaver pelvis specimens containing uncemented THAs from a single institution were evaluated. There were 29 acetabular components that underwent axial pull-out testing using a universal testing machine. A total of seven of these were additionally processed for histologic evaluation, including dehydration, acrylic embedding, thin-sectioning, staining, and digital imaging. Osseointegration was quantified by bone-area fraction occupancy (%BAFO), representing the proportion of bone occupying the porous thread spaces of the cup. RESULTS:All 29 specimens failed through fracture of the ilium rather than at the bone-cup interface, indicating that the mechanical integrity of the osseointegrated construct exceeded that of the surrounding bone under axial tension. Among the seven histologically analyzed components, %BAFO ranged from 4.2 to 27.0% (mean 15.1%), despite all implants being clinically stable at the time of death. There were no significant linear correlations observed between %BAFO and time implanted, fracture load, or body mass index. A significant quadratic relationship between %BAFO and age was identified, peaking near 81 years. CONCLUSIONS:Cementless acetabular components exhibited strong fixation despite modest osseointegration, with failure occurring through host bone on axial testing. Durable biological fixation appears achievable with limited, but mechanically favorable bone ingrowth.

INTRODUCTION/BACKGROUND:Nasoalveolar molding (NAM) is a presurgical technique used to improve nasolabial cleft severity prior to repair. This study ascertains the rates of revision surgery in a large cohort of patients with a cleft who underwent NAM and were followed to facial maturity. METHODS:A single-institution retrospective review of all patients with a cleft who underwent NAM from 1995 to 2005 was performed. Operative reports were queried to record intervnetions to the lip and nose performed through facial maturity. Patients with incomplete medical records prior to reaching skeletal maturity were excluded. Pearson correlation coefficient and two-paired student t-tests were employed for data analysis. RESULTS:A total of 81 patients were studied, 46 male and 35 female, with 52(64%) unilateral and 29(36%) bilateral clefts. Average age at last follow-up was 18.8 years. Revision to the lip was carried out in 36(44%) of patients, and only 3(3.7%) prior to reaching facial maturity. Re-repair was performed in 10(12%) patients. No significant difference of lip revisions rates were seen among patients with a bilateral and unilateral cleft (48% v. 37.9%, p=0.38).Immature cleft rhinoplasty was performed in 3(4%) patients, and more commonly among patients with a unilateral (23%) than bilateral cleft (10%), p=0.18. Mature rhinoplasty was performed in 46(57%) patients, similarly between unilateral (58%) and bilateral clefts (55%). Nasal revision following mature rhinoplasty was performed in 8(10%) patients. CONCLUSIONS:Nasoalveolar molding is an effective adjunct to surgical management in reducing the burden of operative revisions as patients reach facial maturity, namely for bilateral clefts.

Soft tissue reconstruction often requires biomaterials that provide temporary mechanical support while permitting vascular integration and tissue remodeling. In reconstructive breast surgery, these demands converge within a uniquely challenging environment characterized by large surface areas, variable perfusion, frequent exposure to radiation, and reliance on prosthetic implants. Consequently, breast reconstruction serves as a clinically relevant model for evaluating the performance and limitations of soft tissue scaffolds. Acellular dermal matrices (ADMs) were introduced to provide biologically derived reinforcement capable of host integration and neovascularization. Although ADM has transformed implant-based reconstruction, clinical experience has revealed important limitations, including variability in mechanical properties, inconsistent vascularization, susceptibility to fibrosis, and suboptimal performance in compromised tissue beds. These challenges have driven increasing interest in synthetic polymer scaffolds engineered for reproducible mechanics, controlled degradation, and scalable manufacturing. This narrative review examines the evolution from ADM to synthetic and hybrid scaffold systems in breast reconstruction. We discuss how scaffold architecture, thickness, porosity, and degradation kinetics influence angiogenesis, immune response, and mechanical load transfer during healing. Hybrid strategies that incorporate selective bioactivity within synthetic frameworks are also explored, highlighting their translational promise and current limitations. These principles are particularly relevant in implant-based breast reconstruction, where scaffold performance directly influences complication rates, implant stability, and long-term outcomes. Collectively, breast reconstruction serves as a rigorous translational model demonstrating that optimal soft tissue scaffolds must balance vascular permissiveness, mechanical reliability, and predictable resorption to optimize reconstructive success and guide future biomaterial innovation.

BACKGROUND:Achieving adequate analgesia in patients undergoing vaginoplasty facilitates early ambulation, reduces postoperative morbidity and increases patient satisfaction. This study evaluated the use of intraoperative nerve blocks (transverse abdominis plane [TAP] block and perineal block) in reducing postoperative pain and decreasing opioid use in robotic-assisted peritoneal flap vaginoplasty. METHODS:A prospective cohort study of 150 consecutive adult patients undergoing robotic peritoneal flap vaginoplasty performed by the senior authors was conducted at a single institution from December 2023 to October 2024. 75 consecutive patients who did not receive a block and 75 consecutive patients who did receive blocks were included based upon power analysis calculations with assumptions yielding 99% power. Demographic data as well as multimodal analgesic use was compared between groups with respect to use during the preoperative, intraoperative, and post anesthesia phases of care, as well as on each day of inpatient admission. RESULTS:Groups did not differ significantly in baseline characteristics. Block-treated patients demonstrated a significantly reduced total opioid requirement throughout their hospital stay, inclusive of intraoperative and perioperative dosing, as measured in total morphine milligram equivalents (MME) (median 675 versus 26 MME; p < 0.001). Block-treated patients required almost no oxycodone or hydromorphone after surgery with a median oxycodone dose of 0 mg compared with 33 mg in controls (p < 0.001); their total median hydromorphone dose was 0.4 mg versus 1.2 mg (p < 0.001). CONCLUSIONS:The block intervention achieved a dramatic reduction in total postoperative opioid use (oral and intravenous) throughout the hospital stay.

Current evidence suggests that achieving the desired level of osseointegration necessitates a hierarchical approach to implant design. This is particularly relevant for osseointegration around implant systems such as those presenting vertical decompression chambers and acid-etched surfaces which could further be augmented by non-thermal plasma (NTP) treatment. Three implant systems were compared in this study: (i) ND (GM Helix Acqua Implant; Neodent^®, Curitiba, PR, Brazil-hybrid, acid-etched thread design treated with isotonic sodium chloride solution), (ii) Sin (Epikut Plus; S.I.N. Implant System, São Paulo, Brazil-V-shaped, acid-etched thread design treated with nano-hydroxyapatite), and (iii) Mp (Maestro; Implacil De Bortoli, São Paulo, Brazil-buttress, acid-etched thread design with decompressing vertical chambers). The ND and Sin implants were used directly as supplied by the manufacturer. For the Mp implants, the manufacturer-supplied surface was subjected to supplemental acid etching with 37% hydrochloric acid followed by Argon-based NTP treatment administered with a pulsed plasma generator prior to implantation into the iliac crest of n = 12 adult female sheep. Histomorphometric analysis was conducted at 3- and 12-week post-implantation (n = 6 sheep per time point) to assess bone-to-implant contact (BIC) and bone area fraction occupancy (BAFO). After 3 weeks in vivo, the healing chambers of all implant groups consisted predominantly of newly forming woven bone. By 12 weeks, bone maturation was observed, with the presence of remodeling sites and some areas of well-organized lamellar structures occupying the healing chambers. At both 3 and 12 weeks, the Mp implants demonstrated significantly higher BAFO values relative to ND (p = 0.015 and p = 0.008, respectively). The combination of vertical healing chambers, acid etching, and NTP treatment promoted early vascular infiltration and sustained bone deposition.