Surgeries, Volume 6, Issue 2 (June 2025) – 11 articles

Background/Objectives: The structural integrity and strength of the transgingival soft tissue seal around dental implant surfaces remain critical challenges. Therefore, animal models should include all three implant/tissue interfaces: bone, connective tissue, and epithelium. Thus, we sought to explore the rabbit mandibular diastema as a site for candidate intra-oral implant placement. Methods: Ninety-six custom mini-implants (with one of four different surfaces: machined, acid-etched, and with or without a nanotube coating) made from titanium 6/4 alloy were placed in the mandibular diastemas of twenty-four 16-week-old New Zealand white rabbits, with the implant collar above the alveolar crest. After 7, 21, and 42 days, the bony and connective tissue/implant interfaces were examined by light and scanning electron microscopy (SEM). Results: Of ninety-six implants, eight implants were found exposed to the oral cavity, with no evidence of soft tissue inflammation, suggesting that transmucosal implant placement would have been feasible. No significant differences were observed in collagen fiber orientation and fibrous tissue thickness by polarized light microscopy. However, SEM images showed that at all three time points, topographically complex nanotube surfaces had a profound effect on soft tissue peri-implant deposition, although functionally oriented collagen fibers were not identified attached to the implant surface. These surfaces also showed reparative peri-implant bone in the collar region. An intramembranous form of de novo bone formation was observed, together with tartrate-resistant acid-phosphatase-positive osteoclasts and multinucleate giant cells in the peri-implant endosseous compartment. Conclusions: Our results demonstrate that the rabbit mandibular diastema provides an intra-oral method of implant placement without the necessity of an extra-oral approach, tooth extractions, or bone augmentation procedures. Furthermore, given that three implant tissue interfaces can potentially be studied (bone, connective tissue, and epithelium) this model provides advantages over more traditional implant placement sites in the appendicular skeleton. Full article

The evolution of technology and computer graphics algorithms has had a significant impact on the healthcare sector. It is possible to find proposals using virtual reality or augmented reality devices focused on multiple areas, such as education and skills acquisition, the visualisation of results, and disease detection or surgical planning. The use of these new technologies allows the generation of flexible spaces in which the spatial visualisation of clinical data, such as medical images, is enhanced. This also promotes collaboration between different members of the healthcare community. This study aims to review and synthesise current research and the status of applications using systems within Milgram’s continuum of virtuality as tools to facilitate educational or surgical processes in the healthcare sector. We highlight recent approaches to tackling the various key challenges, as well as the limitations of these approaches, and point toward areas of future development. Full article

Background: Neocondylar formation is an uncommon finding that can result after the reconstruction of a vascularized free flap. Three case reports were presented in the current article. (1) A 64-year-old male presented with clear cell Odontogenic Carcinoma to the left mandible. (2) A 14-year-old male presented with an ameloblastoma to the right mandibular associated with tooth 48. (3) A 13-year-old female presented with an ameloblastoma to the right mandible. Methods and Results: All three cases required a surgical resection of the mandible involving the temporomandibular joint. Reconstruction was performed using a vascularized free flap, and Neocondylar formation was observed during the healing process in all three cases. Neocondylar formation after a vascularized free flap reconstruction can improve anatomical functions such as mastication and decrease post-operative complications. Knowledge of this finding can improve future surgical treatment planning and outcome. Conclusion: This report contributes to the existing literature by offering new insights into neo-condylar formation following mandibular reconstruction with vascularized free fibular flap, particularly in complex resective surgeries, and highlights its potential clinical implications. Full article

Background/Objectives: This study identifies and characterizes temporal bone fractures over a five-year period at a level one trauma center, focusing on the injury mechanism, otic capsule involvement, facial nerve involvement, fracture orientation, and the impact of the COVID-19 pandemic on skull base trauma. Methods: This retrospective cross-sectional study from a single level one trauma center reviewed skull base fractures from March 2018 to July 2023, identified with ICD-10 codes. Temporal bone fractures were categorized as otic capsule-sparing or -involving and by orientation (transverse, longitudinal, or oblique). Data were grouped into before, during, and after the COVID-19 lockdown period to address the impact of the COVID-19 pandemic. Data were also grouped into facial nerve injury and no facial nerve injury. Fisher’s exact test (5% significance) and descriptive statistics were used to compare groups. Results: A total of 364 fractures were identified. Facial nerve injuries (6.1%) were more likely in otic-capsule-involving (p < 0.001) and transverse or oblique fractures (p < 0.001). During the COVID-19 lockdown, hospital stays (p = 0.011) and ICU days (p = 0.035) were shorter. Among 22 facial nerve injury cases, half received high-dose steroids, but 6 died before evaluation. Six had complete paralysis; all received steroids, and three had surgical decompression. Only two had documented recovery. Of the 10 patients with partial paralysis, 5 received steroids, but only 2 showed improvement. All patients with incomplete eye closure received protective measures. Conclusions: Temporal bone fractures involving the otic capsule or transverse/oblique patterns are more likely to result in facial nerve injury. There are treatment discrepancies, which highlight a lack of a standard approach to treating those with facial nerve injury. An analysis of the impact of the COVID-19 pandemic revealed shorter hospital and intensive care stays during this time. Full article

Background: Some rib fractures do not heal appropriately and can cause significant pain and morbidity. Little is known about the locations likely to experience dysfunctional healing. We sought to determine the location of symptomatic non-union/malunion (NU/MU) rib fractures presenting to our Chest Wall Injury and Reconstruction Center. Methods: A single-center retrospective cohort study was conducted on all patients with NU/MU fractures presenting for evaluation at our CWIRC from 1 January 2019 to 30 July 2023. Their rib injury locations were mapped using computed tomography scans of the chest and a physical exam was used to characterize the location of their symptomatic NU/MU fractures. The location of the NU/MU injury was identified as either the anterior (A), anterior–lateral (AL), lateral (L), posterior–lateral (PL), or posterior (P) region of the chest wall. The results are presented as a mean +/− standard deviation for normally distributed data and median (minimum—maximum) for non-normally distributed data. Results: A total of 28 cases were evaluated. The average age at time of presentation was 48+/−14 years and 71% of patients were male. A total of 72 NU/MU fractures (median/pt 2(1–11)) were evaluated. Sixty-one percent of the injuries were on the right side. In most patients (25/28, 89%), the injuries were all in the same anatomic location in the rib cage. Three patients had NU/MU injuries in multiple anatomic locations. All multilevel injuries were sequential, without any normally healed ribs between NU/MU injuries. The most common locations were the L and PL regions (A–3, AL–8, L–19, PL–42, P–0). The most commonly symptomatic ribs were in ribs 6–10. Conclusions: Symptomatic NU/MU healing often occurs in the L and PL locations along the bony chest wall. Symptomatic NU/MU injuries also occur in the cartilaginous extensions of the bony ribs and along the costal margin. Symptomatic NU/MU healing is uncommon in the A and AL upper rib cage, as well as in P injuries. Full article

Introduction: Obesity affects over 650 million individuals worldwide and poses a significant public health challenge. Bariatric surgery is the most effective treatment for severe obesity, resulting in substantial weight loss and improvements in obesity-related conditions. However, the weight loss achieved through bariatric surgery is often associated with a notable decline in skeletal muscle. This association suggests an elevated risk of sarcopenia among patients following surgery. The purpose of this study was to assess the effects of obesity and bariatric surgery on indicators and diagnoses related to sarcopenia before and after surgery. Methods: A total of 17 bariatric surgery patients participated in this prospective study. The parameters for diagnosing sarcopenia were established for each participant, based on the EWGSOP2 and EASO/ESPEN consensuses. All evaluations were conducted at five time points throughout this study: before surgery and at 1, 6, 12, and 18 months post-surgery. Results: In this study, 88.2% of the subjects were female, with an average BMI of 42.9 kg/m² and a mean weight of 105.9 kg. After surgery, the average weight consistently decreased, with all differences from baseline being statistically significant (p < 0.001). Utilizing the SARC-F questionnaire for screening, the risk of sarcopenia increased post-surgery, then decreased at 12 months, ultimately reaching zero at 18 months. Muscle strength significantly decreased (p = 0.002) during the one-month post-surgery assessment, with slight variations thereafter, none of which were statistically significant. Muscle mass was normal prior to surgery but showed a significant decline post-surgery (p < 0.001). When applying the ESPEN/EASO consensus cut-off criteria for sarcopenic obesity, 35.3% of patients met the criteria preoperatively. After surgery, this figure rose to 70.6% in the first month but then decreased to 41.2% at 6 months. Conclusions: The findings reveal a distinct detrimental impact of bariatric surgery on muscle strength and mass, which are crucial indicators of sarcopenia. Additionally, this impact appears to arise very early after surgery, suggesting that the optimal timeframe for efforts to mitigate this effect may be during the prehabilitation period followed by the post-surgery timeframe. Full article

Background/Objectives: The insertion of engineered scaffolds and tissues requires precise surgical implantation with minimal interfacial scarring. Nanometric scale material polishing technologies developed for manufacturing microelectronic circuits make it possible to polish and sharpen surgical instruments at near-atomic-scale precision. We tested the hypothesis that the use of precision-sharpened scalpel blades would result in less tissue inflammation and incisional scarring. Methods: Parallel contralateral para-spinal longitudinal 4 cm long skin incisions in guinea pigs were performed, one side with a standard scalpel blade (SB) and the other with a polished nanometric scale, engineered experimental scalpel blade (EB). The side used for the polished blade was alternated and blinded from the histochemistry analysis team. The wound was excised at five time points (1, 3, 7, 16, and 60 days) with five animals per group. Histological and histochemical differences were compared. Results: The EB resulted in less bleeding, better wound adherence, relatively less macrophage density, scar volume, and granulation tissue, and significantly reduced levels of M1, M2, and TGF-β expression. Conclusions: Nanometric-scale-polished surgical scalpel blades produce significantly less tissue inflammation, scarring, and fibrosis. Full article

Background: Emphysema is a chronic lung disease characterized by alveolar wall destruction, leading to impaired gas exchange. Giant bullous emphysema (GBE) is a severe form of emphysema, often requiring surgical intervention. Video-assisted thoracoscopic surgery (VATS) is a minimally invasive approach for various thoracic pathologies, including lung volume reduction surgery (LVRS) and bullectomy for emphysematous bullae. Uniportal VATS (U–VATS), a further refinement, offers benefits such as reduced postoperative pain and faster recovery. Methods: This retrospective study analyzed data from two high-volume European Thoracic Surgery centers between August 2016 to January 2024. A total of 29 patients underwent U–VATS bullectomy for GBE. Results: Nineteen patients were males (65.5%) with a mean age of 44.7 ± 8.8 years. Ten (34.5%) were active smokers. Eighteen patients (62.1%) presented with a single giant bulla, while the remaining cases were in the context of pulmonary emphysema. Four patients (13.8%) presented with pneumothorax, with one requiring preoperative chest drainage. Twenty-eight patients (96.6%) underwent only U–VATS bullectomy, with additional chemical pleurodesis in eleven cases (37.9%). One patient (3.4%) underwent a left upper lobectomy for a giant bulla and NSCLC. In cases of severe lung emphysema and fragile pulmonary tissue, the stapler line was buttressed with Gore^® Seamguard^®. No conversions to thoracotomy, postoperative air-leaks, or major complications were recorded. At a mean follow-up time of 22.0 ± 14.0 months, no pneumothorax recurrence was documented. At about six months after surgery, pulmonary function significantly improved. Conclusions: U–VATS bullectomy appears to be a safe and feasible technique for the treatment of bullae in GBE, offering promising postoperative outcomes. Full article

Odontogenic myxoma (OM) is a rare, benign intraosseous tumor that arises from the dental follicle, dental papilla, or periodontal ligament. It typically affects the mandible, maxilla, and sinuses, more frequently in women than men. The histopathology of OM is characterized by a myxoid stroma with varying degrees of collagenization and spindle cells. Treatment is surgical, but there are no standardized guidelines. Available options include enucleation and curettage, with conservative approaches offering better aesthetics and functionality but a higher recurrence risk. This case report aims to discuss a rare presentation of OM in the anterior part of the mandible of a 22-year-old female patient with Hashimoto’s thyroiditis and idiopathic thrombocytopenic purpura. The patient presented with painless swelling and tooth mobility in the symphysis region. Radiographic evaluation revealed a unilocular lesion extending from the left second incisor to the right first incisor, with no root resorption. Histopathological analysis confirmed the OM diagnosis. Due to the patient’s young age and the size of the lesion, a conservative treatment approach was chosen, with the potential for future implant-prosthodontics rehabilitation. The case underscores the importance of thorough clinical, radiological, and histopathological assessment to ensure accurate diagnosis and management of OM. Long-term follow-up is essential due to the increased risk of recurrence in younger patients. Full article

Objective: To evaluate the impact of a prosthetic and native aorta proximal landing zone (PLZ) for hybrid thoracic aorta repair with a stent graft deployed in the Zone 0 ascending aorta. Methods: Retrospective analysis of 100 patients who underwent Zone 0 hybrid thoracic aorta repair between 2005 and 2022, at a single institution. Fifty-eight (58%) had a Dacron PLZ (ascending aorta replacement with debranching), and forty-two (42%) had a native ascending aorta PLZ (off-pump aortic arch debranching). All the surviving patients had at least one radiological follow-up. Results: Patients with a native aorta PLZ were older (p = 0.01) and had higher rates of pulmonary disease (p = 0.01) and chronic kidney disease (p = 0.01) and a higher Logistic EUROscore (p = 0.02). In-hospital mortality was similar between the two groups (2.3% vs. 1.7%; p = 0.68). Retrograde aortic dissection was observed in four (9.2%) of the native PLZ group. The mean follow-up was 37 ± 22 months in the Dacron PLZ group and 42 ± 20 months in the native PLZ group (p = 0.05). At 1,3, and 5 years, freedom from Type Ia endoleak was significantly higher in patients with a Dacron PLZ: 100% vs. 96 ± 0.3%, 100% vs. 85 ± 1%, and 100% vs. 66 ± 1.3% (p = 0.03). Despite this, the 1-, 3-, and 5-year survival was similar between groups: 100% vs. 96 ± 0.4%, 90 ± 1% vs. 89 ± 0.6%, and 66 ± 1% vs. 64 ± 2%. (p = 0.96). Conclusions: Endograft deployment in a prosthetic ascending aorta is a safe and durable option for aortic repair. A Dacron PLZ is associated with a lower rate of Type Ia endoleak and can prevent retrograde aortic dissection when compared with native aorta. Full article

The first metatarsal has the greatest inclination of all metatarsals and carries about 40% of body weight during the static stance. The rearfoot and the first ray (FR) are two distinct structures, but they are strongly related to the latest studies in the literature; however, their mutual involvement in the foot biomechanics appears not to be fully explored. Understanding their interdependence is essential to approaching the patient in his totality. This overview aims to analyze the current evidence from the latest studies that examine the correlation between FR insufficiency (FRI) and hindfoot valgus (HV), focusing on their biomechanical interaction, clinical implications, and treatment approaches. All analyzed studies showed that plantarflexion of the first metatarsophalangeal (MTP1) joint in correct alignment increased by 26% compared to a deviated articulation. In FRI, the “windlass” mechanism appears compromised, and FR lacks the necessary stability and plantarflexion; consequently, the medial arch collapses, and the foot moves into excessive pronation. On the other hand, in HV condition, the pulley system is significantly diminished, and peroneus longus contraction cannot stabilize the FR with resultant FRI and dorsal migration. A significant correlation was found between hindfoot alignment and first metatarsal rotation (86% of patients) and between HV and hallux valgus. Foot orthoses, physical therapy, and exercise programs, especially in the initial stages of symptomatic HV, provide satisfactory results in 67% to 90% of cases, improving foot alignment and pain relief in FRI patients. In more severe cases, surgical intervention to realign the hindfoot is indicated with a very low complication rate (1–4%), which can vary from 24% to 55% in stage 4 flatfoot. No study in the literature has been found to address both pathologies simultaneously from a treatment point of view, and, although not all HV patients are affected by FRI, most patients seem to benefit from surgical stabilization of the FR in 80% of individuals with symptomatic HV. However, despite a predominance of FRI among HV individuals, not all clinical studies have confirmed this correlation. Full article