Early Detection of Oral Potentially Malignant Disorders: A Review on Prospective Screening Methods with Regard to Global Challenges.

Oral cancer is a cancer type that is widely prevalent in low-and middle-income countries with a high mortality rate, and poor quality of life for patients after treatment. Early treatment of cancer increases patient survival, improves quality of life and results in less morbidity and a better prognosis. To reach this goal, early detection of malignancies using technologies that can be used in remote and low resource areas is desirable. Such technologies should be affordable, accurate, and easy to use and interpret. This review surveys different technologies that have the potentials of implementation in primary health and general dental practice, considering global perspectives and with a focus on the population in India, where oral cancer is highly prevalent. The technologies reviewed include both sample-based methods, such as saliva and blood analysis and brush biopsy, and more direct screening of the oral cavity including fluorescence, Raman techniques, and optical coherence tomography. Digitalisation, followed by automated artificial intelligence based analysis, are key elements in facilitating wide access to these technologies, to non-specialist personnel and in rural areas, increasing quality and objectivity of the analysis while simultaneously reducing the labour and need for highly trained specialists.

A paradigm shift in the prevention and diagnosis of oral squamous cell carcinoma.

BACKGROUND: Oral squamous cell carcinoma (OSCC) is a widespread disease with only 50%-60% 5-year survival. Individuals with potentially malignant precursor lesions are at high risk. METHODS: Survival could be increased by effective, affordable, and simple screening methods, along with a shift from incisional tissue biopsies to non-invasive brush biopsies for cytology diagnosis, which are easy to perform in primary care. Along with the explainable, fast, and objective artificial intelligence characterisation of cells through deep learning, an easy-to-use, rapid, and cost-effective methodology for finding high-risk lesions is achievable. The collection of cytology samples offers the further opportunity of explorative genomic analysis. RESULTS: Our prospective multicentre study of patients with leukoplakia yields a vast number of oral keratinocytes. In addition to cytopathological analysis, whole-slide imaging and the training of deep neural networks, samples are analysed according to a single-cell RNA sequencing protocol, enabling mapping of the entire keratinocyte transcriptome. Mapping the changes in the genetic profile, based on mRNA expression, facilitates the identification of biomarkers that predict cancer transformation. CONCLUSION: This position paper highlights non-invasive methods for identifying patients with oral mucosal lesions at risk of malignant transformation. Reliable non-invasive methods for screening at-risk individuals bring the early diagnosis of OSCC within reach. The use of biomarkers to decide on a targeted therapy is most likely to improve the outcome. With the large-scale collection of samples following patients over time, combined with genomic analysis and modern machine-learning-based approaches for finding patterns in data, this path holds great promise.

Analytical Study of Stress Distributions around Screws in Flat Mandibular Bone under In-Plane Loading.

A known complication for mechanically loaded bone implants is the instability due to screw loosening, resulting in infection and the non-union of fractures. To investigate and eventually prevent such bone degradation, it is useful to know the stress state in the bone around the screw. Considering only in-plane loadings and simplifying the mandibular bone into an orthotropic laminated plate, the analysis was reduced to a two-dimensional pin-loaded plate problem. An analytic model, based on the complex stress analysis, was introduced to the bone biomechanics field to obtain the stress distributions around the screw hole in the bone. The dimensionless normalized stresses were found to be relatively insensitive to the locations of the screw hole over the mandible. Parametric analyses were carried out regarding the friction coefficient and load direction. It was found that the load direction had a negligible influence. On the contrary, the friction coefficient had a significant effect on the stress distributions. Whether the screw was well bonded or not thus played an important role. The proposed analytic model could potentially be used to study bone failure together with stress-based failure criteria.

Dental hygienists and dentists as providers of brush biopsies for oral mucosa screening.

BACKGROUND: Oral cancer is a severe and potentially fatal disease usually starting in the squamous epithelium lining the oral cavity. Together with oropharyngeal carcinoma, it is the fifth to sixth most common malignancy worldwide. To limit the increase in the global oral cancer incidence over the past two decades, the World Health Assembly adopted a resolution urging member states to integrate preventive measures such as engagement and training of dental personnel in screening, early diagnosis, and treatment into their national cancer control programs. AIM: The aim of this study was to investigate if dental hygienists (DHs) and dentists (Ds) in general dental practice care can be entrusted to perform brush sampling of oral potentially malignant disorders (OPMDs), and to evaluate their level of comfort in performing brush biopsies. METHODS: Participants were five DHs and five Ds who received one day of theoretical and clinical training in oral pathology to identify OPMDs (leukoplakia [LP], erythroplakia [EP], and oral lichen planus [OLP]), and perform brush sampling for PAP cytology and high-risk human papillomavirus (hrHPV) analysis. RESULTS: Out of 222 collected samples, 215 were adequate for morphological assessment and hrHPV analysis. All the participants agreed that sample collection can be incorporated in DHs and Ds routine clinical duties, and most of them reported that sample collection and processing was easy/quite easy. CONCLUSION: Dentists and DHs are capable of collecting satisfactory material for cytology and hrHPV analysis. All the participating DHs and Ds were of the opinion that brush sampling could be handled routinely by DHs and Ds in GDP.

Minding the gap and the value of metrics: Count of working pharmacists in the United States.

BACKGROUND: The Bureau of Labor Statistics (BLS) uses a single Standard Occupational Classification (SOC) code (29-1051) that reflects a traditional definition of pharmacist job functions. Pharmacists working in nontraditional roles would be categorized under other SOC codes and not included in the BLS pharmacist count. Knowing the magnitude of how many working pharmacists may not be included in the BLS pharmacist count would help determine whether the gap is a minor margin of error or a significant problem affecting pharmacist workforce projections. OBJECTIVES: The primary objective of this paper was to estimate the gap between the number of possibly working pharmacists and the BLS pharmacist count in 2019. A secondary objective was to examine BLS pharmacist counts in nontraditional roles and compare with published industry data. METHODS: The annual number of individuals receiving their first professional pharmacy degree from 1965 to 2019 (55 graduation cohorts) was adjusted using the expected survival rate to 2019 by age and gender and workforce participation rate in 2019 for pharmacists for each cohort and then summed across cohorts. Data sources included Accreditation Council for Pharmacy Education, U.S. Vital Statistics reports, and American Consumer Survey. One-way and scenario-based sensitivity analyses were conducted to vary professional occupation mortality advantage and pharmacist workforce participation rate assumptions. RESULTS: Based on the number of individuals receiving their first professional pharmacy degree between 1965 and 2019 (442,409), there were 356,998 possibly working pharmacists in 2019. This value indicates 45,798 more pharmacists (15%) may have been working in 2019 than the 311,200 employee pharmacists reported by BLS for 2019. A gap of 8000 to 46,000 more working pharmacists (3%-15%) versus BLS persisted after sensitivity analyses. CONCLUSION: The magnitude of possibly working pharmacists not included in BLS counts warrants further consideration of current pharmacist job projections, methods, and metrics to improve future projections and monitoring of the pharmacist labor force.

Longitudinal Effects on Metabolic Biomarkers in Veterans 12 Months Following Discharge from Pharmacist-Provided Diabetes Care: A Retrospective Cohort Study.

Clinical pharmacist interventions have resulted in optimized diabetes control in complex patients; however, there are no studies examining the durability of achieved outcomes after patients discontinued being seen by the pharmacist. A pharmacist-led comprehensive medication management (CMM) Diabetes Intensive Medication Management (DIMM) "tune up" clinic provided the opportunity to evaluate long-term glycemic control outcomes following clinical discharge. This study used a retrospective cohort study design with a matched primary care provider (PCP) comparison group. Outcomes were compared between the groups at several post-discharge intervals (6, 9, and 12 months) using independent t tests and chi-square tests, where appropriate. DIMM-managed patients achieved an average HbA1c reduction of 3% upon discharge, and maintained an average HbA1c concentration that was significantly lower than PCP-managed patients at 6 months (p < 0.001) and 9 months (p = 0.009) post-discharge. Although DIMM-managed patients had lower HbA1c than PCP-managed patients at 12 months post-discharge, the difference was not significant (p = 0.105). Similar findings were noted for average FPG and LDL across the study time points. No differences in average HDL levels were reported across the time points. A significantly larger proportion of DIMM-managed patients maintained HbA1c < 8% compared to PCP-managed patients at 6 months (67.5% versus 47.2%, p = 0.001) and 9 months (62.6% versus 40.6%, p = 0.040) post-discharge; DIMM-managed patients had a larger, but non-significant, proportion of goal retention compared to PCP-managed patients at 12 months (56.9% versus 47.2%, p = 0.126) post-discharge. Similarly, a significantly larger proportion of DIMM-managed patients sustained HbA1c < 9% compared to PCP-managed patients at 6 months (87.8% versus 66.7%, p < 0.001) and 9 months (82.1% versus 68.3%, p = 0.012) post-discharge; however, there was no significant difference at 12 months. The attenuation of the DIMM-managed metabolic biomarkers suggests that an additional follow-up visit or touchpoint may be helpful. The personalized care of the DIMM "tune up" approach was successful in achieving sustained glycemic control for up to 9 months. Outcomes can help inform future long-term result durability evaluations.

Supporting COVID-19 Vaccine Rollout before Charter Class Arrives: The University of California, Irvine Experience.

Despite numerous challenges in relation to being a recently established school, the University of California, Irvine (UCI) School of Pharmacy and Pharmaceutical Sciences (SPPS), similar to many schools of pharmacy in the United States, was highly committed to supporting the rollout of COVID-19 vaccines. UCI SPPS and our affiliated UCI Medical Center (UCIMC) Pharmacy Department partnered to spearhead the pharmacy element of a large-scale COVID-19 vaccination clinic on campus for both employees and the community. Three key initiatives were established in order to overcome the obstacles we faced in the large-scale roll out of COVID-19 vaccines: (1) forging new collaborations within the pharmacy team, (2) leveraging interprofessional education and practice, and (3) raising awareness of the pharmacists' role. Our response to the COVID-19 vaccines at UCI was a tangible, visible model that demonstrated that, while we continue to embrace our role in team-based, patient-centered care, it is also important for us to step up and lead the profession. Additionally, this vaccine rollout experience is a teachable moment for our communities and our health professional partners as we continue to march forward as one voice to serve the American public.

Improved Patient-Reported Medication Adherence, Patient Satisfaction, and Glycemic Control in a Collaborative Care Pharmacist-Led Diabetes "Tune-Up" Clinic.

Diabetes complications remain a leading cause of death, which may be due to poor glycemic control resulting from medication nonadherence. The relationship between adherence status and HbA1c (glycemic control) has not been well-studied for clinical pharmacist interventions. This study evaluated medication adherence, patient satisfaction, and HbA1c, in a collaborative pharmacist-endocrinologist diabetes clinic over 6 months. Of 127 referred, 83 patients met the inclusion criteria. Mean medication adherence scores, considered "good" at baseline, 1.4 ± 1.2, improved by 0.05 points (p = 0.018), and there was a 26% increase in patients with good adherence. A significant improvement of 0.40 percentage points (95% CI: -0.47, -0.34) was observed in mean HbA1c across the three time points (p < 0.001). Mean total satisfaction scores were high and increased, with mean 91.3 ± 12.2 at baseline, 94.7 ± 9.6 at 3 months, and 95.7 ± 10.8 at 6 months (p = 0.009). A multimodal personalized treatment approach from a pharmacist provider significantly and positively impacted glycemic control regardless of self-reported medication adherence, and patient satisfaction remained high despite changing to a clinical pharmacist provider and increased care intensity.

Transferring Key Success Factors from Ambulatory Care into the Community Pharmacy in the United States.

In the United States, pharmacists' scope of practice continues to expand, with increasing opportunities for pharmacists in all practice settings to enhance health in society. In ambulatory care, pharmacists remain integral members on the healthcare team and have demonstrated positive impacts on patient care. Sharing similar characteristics as pharmacists in the community setting, a deeper look into common elements of a successful ambulatory care practice that can be applied in the community pharmacy setting is warranted. Key success factors identified from ambulatory care include (1) maximizing a pharmacist's unique knowledge base and skill set, (2) forming collaborations with physicians and other providers, (3) demonstrating outcomes and value, and (4) maintaining sustainability. Opportunities exist for pharmacists in the community setting to utilize these success factors when developing, implementing, and/or expanding direct patient care services that improve accessibility to quality care and population health.

Patient-reported pain after surgical removal of leukoplakia - an observational 1-year follow-up study.

OBJECTIVE: Oral leukoplakia (OL) presents as a white lesion of the oral mucosa and is not typically associated with the sensation of pain. OL should be surgically removed when possible because it is considered a potentially malignant oral disorder (PMOD). This study assessed the pain sensations experienced by patients in association with the occurrence and surgical treatment of OL. METHODS: Inclusion criteria were: a clinical diagnosis of OL; biopsy excision; and observation for at least 12 months in the ORA-LEU-CAN study. At the first visit, all the patients were asked about the occurrence of symptoms within the lesion. Ninety-four subjects were assessed over a period of 1 year. All patients underwent complete removal of OL. The patient cohort was divided into three sub-groups: (i) no pain before excision and at the 1-year follow-up; (ii) pain before excision; and (iii) pain at the 1-year follow-up. RESULTS: Overall, pain was reported by 21.3% of the patients at the study start whereas 13.8% of the patients reported pain 1 year after surgical treatment. Patient-reported pain from the lesion at study inclusion was significantly associated with lesions found on the lateral side of the tongue (p=.002). Pain reported by patients one year after surgery was significantly related to female gender (p=.038) and the presence of epithelial cell dysplasia (p=.022). CONCLUSION: We conclude that surgical removal of OL results in a low risk of long-term post-surgical pain. However, OL located on the lateral side of the tongue and in OL with dysplasia are more likely to be associated with pain.

Brush Samples of Oral Lesions to FTA Elute Card for High-risk Human Papilloma Virus Diagnosis.

AIM: To investigate the level of agreement between three non-invasive methods for hrHPV diagnosis in oral and oropharyngeal squamous cell carcinoma (OSCC, OPSCC) and in oral mucosal lesions. MATERIALS AND METHODS: For hrHPV DNA FTA Elute card™ and Anyplex II HPV28™ were used and for hrHPV mRNA PreTect SEE™ in tumour patients (n=60), non-tumour lesions (n=51), immunosuppression or previous hrHPV-infection (n=32). RESULTS: The level of agreement between the DNA-methods was 82.2% (k=0.54, p=0.001). Pair-wise comparison for the FTA Elute card were close to the reference (AUC=0.83, 95% CI=0.73-0.90). hrHPV mRNA was diagnosed in 50% of the tumours, with an agreement level of 58.3%, compared to Anyplex II (k=0.17, p=0.04). The hrHPV positivity in oral lesions was 3.9% for immunosuppression and for previous HPV infection 9.4%. CONCLUSION: The FTA card is reliable for hrHPV DNA diagnosis while mRNA gives an insight into viral activity and correlates with severity of the lesion.

High-risk human papillomavirus in patients with oral leukoplakia and oral squamous cell carcinoma-A multi-centre study in Sweden, Brazil and Romania.

OBJECTIVES: Although causal associations between oral leukoplakia (OL), oral squamous cell carcinoma (OSCC) and high-risk human papillomavirus (HR-HPV) have been speculated upon in several reports, conclusive evidence has not been presented. This study investigates whether the number of cases of HR-HPV in OL has increased over time and whether the prevalence of HR-HPV-positive OL differs in various parts of the world. PATIENTS AND METHODS: A total of 432 patients with OL from Sweden, Brazil and Romania were analysed. Patients were divided into historical (1992-2002) and contemporary (2011-2017) cohorts from the respective countries. Seventeen patients with OL developed oral squamous cell carcinoma (OSCC). A real-time PCR assay, targeting HPV sub-types 6,11,16,18,31,33,35,39,45,52,56,58 and 59, was performed to detect HR-HPV in patients with OL. RESULTS: In the Swedish and Romanian cohorts, none of the investigated HPV sub-types were detected. In the Brazilian cohorts, five patients with OL (3%) were positive for HR-HPV, including four patients from the contemporary cohort (HPV 16, 31, 33) and one from the historical cohort (HPV 11). All the cases of OL that transformed into OSCC were HR-HPV-negative, as were the corresponding tumours. CONCLUSIONS: In summary, the prevalence of HR-HPV in OL is low in all the tested countries, and the incidence has not changed over time. HR-HPV in OL does not seem to be a driver of oncogenesis.

Impact of a contactless prescription pickup kiosk on prescription abandonment, patient experience, and pharmacist consultations.

OBJECTIVE: Investigate the impact of increased access to new and refilled prescriptions by means of an automated pickup kiosk (Asteres ScriptCenter) on prescription abandonment rates, patient experience, and pharmacist consultations. DESIGN: Nonrandomized, observational study using retrospective, deidentified data from the filling pharmacy, the kiosk, and a pharmacist-completed counseling documentation log over a 35-month study period. SETTING AND PARTICIPANTS: Hospital employees opting to use a kiosk located in the lobby with 24 hours a day, 7 days a week access for pickups and a telephone pharmacist consultation service compared with employees using the regular counter at the filling pharmacy. OUTCOME MEASURES: Return to stock (RTS) rate to assess prescription abandonment, time to prescription pickup, consultation duration, kiosk user assessment, and pharmacist assessment of counseling ability. RESULTS: Approximately 9% of employees (440) enrolled to use the kiosk, with 5062 kiosk pickups recorded for new prescriptions (29%), refill prescriptions (33%), and over-the-counters (38%). The mean kiosk RTS (4.3% ± 3.2) was lower than that at the regular counter (5.6% ± 0.8), P = 0.04, whereas the mean time to pickup was approximately 1 day greater at the kiosk than the regular counter (2.8 ± 0.4 vs. 1.8 ± 0.2, P < 0.001). The average kiosk consultation was approximately 1 minute shorter (2.0 ± 1.4) than that of the regular counter (3.4 ± 1.9, P < 0.001), and fewer patients using the kiosk (15.7%) had additional questions at the end of a consultation session than patients at the regular counter (38.8%, P < 0.001). Most of the kiosk users agreed that their prescription questions were answered and that kiosk convenience was an important reason for using the filling pharmacy. Almost all (>90%) pharmacists indicated that they were able to effectively counsel patients at the kiosk and the regular counter. CONCLUSION: The kiosk, used by self-selected health care workers located in a hospital workplace setting with 24 hours a day, 7 days a week access, was a convenient, contactless pickup extension of the filling pharmacy with a lower prescription abandonment rate and similar pickup and consultation characteristics as at the regular pharmacy counter.

Aerosol Retention Characteristics of Barrier Devices.

BACKGROUND: Disease severity in coronavirus disease 2019 (COVID-19) may be associated with inoculation dose. This has triggered interest in intubation barrier devices to block droplet exposure; however, aerosol protection with these devices is not known. This study hypothesized that barrier devices reduce aerosol outside of the barrier. METHODS: Aerosol containment in closed, semiclosed, semiopen, and open barrier devices was investigated: (1) "glove box" sealed with gloves and caudal drape, (2) "drape tent" with a drape placed over a frame, (3) "slit box" with armholes and caudal end covered by vinyl slit diaphragms, (4) original "aerosol box," (5) collapsible "interlocking box," (6) "simple drape" over the patient, and (7) "no barrier." Containment was investigated by (1) vapor instillation at manikin's right arm with video-assisted visual evaluation and (2) submicrometer ammonium sulfate aerosol particles ejected through the manikin's mouth with ventilation and coughs. Samples were taken from standardized locations inside and around the barriers using a particle counter and a mass spectrometer. Aerosol evacuation from the devices was measured using standard hospital suction, a surgical smoke evacuator, and a Shop-Vac. RESULTS: Vapor experiments demonstrated leakage via arm holes and edges. Only closed and semiclosed devices and the aerosol box reduced aerosol particle counts (median [25th, 75th percentile]) at the operator's mouth compared to no barrier (combined median 29 [-11, 56], n = 5 vs. 157 [151, 166], n = 5). The other barrier devices provided less reduction in particle counts (133 [128, 137], n = 5). Aerosol evacuation to baseline required 15 min with standard suction and the Shop-Vac and 5 min with a smoke evacuator. CONCLUSIONS: Barrier devices may reduce exposure to droplets and aerosol. With meticulous tucking, the glove box and drape tent can retain aerosol during airway management. Devices that are not fully enclosed may direct aerosol toward the laryngoscopist. Aerosol evacuation reduces aerosol content inside fully enclosed devices. Barrier devices must be used in conjunction with body-worn personal protective equipment.

National survey of physicians' perspectives on pharmacogenetic testing in solid organ transplantation.

INTRODUCTION: Our objective was to evaluate physicians' perspectives on the clinical utility of pharmacogenetic (PGx) testing in kidney, liver, heart, and lung transplantation (KLHL-Tx). METHODS: A 36-question web-based survey was developed and administered to medical and surgical directors of US KLHL-Tx centers. RESULTS: There were 82 respondents (10% response rate). The majority were men (78%), non-Hispanic whites (70%), medical directors (72%), and kidney transplant physicians (35%). Although 78% of respondents reported having some PGx education, most reported lack of confidence in their PGx knowledge and ability to apply a PGx test. Participants reported mixed views about the clinical utility of PGx testing-most agreed with the efficacy of PGx testing, but not the benefits relative to the risks or standard of care. While 55% reported that testing was available at their institution, only 38% ordered a PGx test in the past year, most commonly thiopurine-S-methyltransferase. Physician-reported barriers to PGx implementation included uncertainty about the clinical value of PGx testing and patient financial burden. CONCLUSION: Together, our findings suggest prospective PGx research and pilot implementation programs are needed to elucidate the clinical utility and value of PGx in KLHL-Tx. These initiatives should include educational efforts to inform the use of PGx testing.

Patterns of Stress, Coping and Health-Related Quality of Life in Doctor of Pharmacy Students.

Objective. To examine perceived stress, coping strategies, and health-related quality of life in Doctor of Pharmacy students across the first three years (pre-clinical portion) of the curriculum. Methods. Three instruments, the Perceived Stress Scale, Brief COPE, and Short Form-36, were administered to students three times a year over a five-year period. Median annual scores were compared using Skillings-Mack tests and correlations were assessed using Spearman correlation. Results. One hundred forty-five students (approximately 46% of the school's enrollment) participated. A significant increase in scores on the PSS, increase in students' maladaptive coping behaviors, and worsening mental health-related quality of life were detected in students across the first three years of the pre-clinical curriculum. The PSS scores of first- and second-year pharmacy students had a moderate to large positive correlation with maladaptive coping behaviors (rho = 0.43 and 0.58, respectively) and PSS scores exhibited a large negative correlation with maladaptive coping behaviors in all three years of the pre-clinical curriculum (rho ranged from -0.69 to -0.78). Conclusion. Increasing levels of stress, increasing use of maladaptive coping strategies, and declining mental health-related quality of life among pharmacy students across the first three years of the four-year curriculum were very similar to findings in the cohort of pharmacy students observed in the preceding five years.

Improved Glycemic Control Outcomes Regardless of Mental Health Disorders in a Pharmacist-Endocrinologist Diabetes Intense Medical Management (DIMM) "Tune Up" Clinic.

Background: Previous studies show patients with type 2 diabetes (T2D) and a mental health (MH) disorder exhibit poorer glycemic control compared with those without. Objective: Compare mean change in glycosylated hemoglobin (A1C) after 6 months in the Diabetes Intense Medical Management (DIMM) "Tune Up" Clinic in patients with and without MH disorders. Methods: Retrospective cohort study in T2D patients, with A1C at baseline and 6 months, divided into subgroups of those with ≥1 MH diagnoses and without MH. Primary outcome was mean change in A1C from baseline to 6 months. Secondary outcomes were mean change in other metabolic parameters and proportion achieving A1C and related goals. Results: Of 155 patients meeting inclusion criteria, 66 (42.6%) had at least 1 MH disorder (MH group) and 89 (57.4%) did not (non-MH group). Mean A1C, fasting blood glucose (FBG), and triglycerides (TG) change (improvement) did not differ significantly between MH and non-MH groups at 6 months (eg, A1C reduction: -2.1% [SD = 2.0] vs -2.3% [SD = 2.1]; P = 0.61, respectively). Percentage at A1C goal did not differ significantly between groups, though a higher percentage of the non-MH group achieved FBG and TG goals than the MH group. Conclusion and Relevance: In 6 months, both groups in the DIMM clinic achieved a statistically significant mean A1C reduction (over 2%) with no statistical or clinical difference in the magnitude of change between groups. Patients with T2D benefitted from the DIMM model and personalized visits with a pharmacist regardless of having a MH disorder.

Fibula Graft Cutting Devices: Are 3D-Printed Cutting Guides More Precise than a Universal, Reusable Osteotomy Jig?

Individual cutting guides for the reconstruction of lower jaw defects with fibular grafts are often used. However, the application of these osteotomy tools is costly and time intensive. The aim of this study was to compare the precision of osteotomies using a 3D-printed guide with those using a universal, reusable, and more cost-efficient Multi-Use Cutting Jig (MUC-Jig). In this non-blinded experimental study, 10 cranio-maxillofacial surgeons performed four graft removals each in a randomized order using the same osteotomy angle, both proximally (sagittal cut) and distally (coronal cut), of a graft (45°, 30°, 15°, or 0°), first with the MUC-Jig then with the 3D-printed cutting guide. The 40 fibula transplants (Tx) of each method (n = 80) were then analyzed concerning their Tx length and osteotomy angles and compared to the original planning data. Furthermore, the surgeons' subjective perception and the duration of the two procedures were analyzed. The mean relative length and mean relative angle deviation between the MUC-Jig (-0.08 ± 1.12 mm; -0.69° ± 3.15°) and the template (0.22 ± 0.90 mm; 0.36° ± 2.56°) group differed significantly (p = 0.002; p = < 0.001), but the absolute deviations did not (p = 0.206; p = 0.980). Consequently, clinically comparable osteotomy results can be achieved with both methods, but from an economic point of view the MUC-Jig is a more cost-efficient solution.

A simple, effective, universal, and reusable osteotomy tool for jaw reconstructions with microvascular fibula transplants.

BACKGROUND: Precise, expensive individual saw guides are used with increasing frequency for the reconstruction of mandibular defects with fibular grafts. In this report, an alternative is presented - the Multiuse Cutting Jig (MUC-Jig, proprietary development). It is reusable, suitable for all patients, requires simple planning based on conventional CT imaging, and is more economical. METHODS: To investigate its precision, we conducted a nonblinded experimental study, with ten participating craniomaxillofacial surgeons. Osteotomies of four different fibula segments were carried out at the same angulation, with groups defined according to the proximal and distal fixed angulation: 45°, 30°, 15°, or 0°. The sagittal cut was performed proximally, with the coronal cut performed distally. The resulting 40 segments (n = 40) were analyzed with their Tx length (primary endpoint) and osteotomy angles, and compared to the original planning. RESULTS: The mean (SD) relative deviation of all grafts from the original planning was -0.08 mm (1.12) in length and -0.71° (3.15) for the angle. Only 45° (-2.04 ±â€¯3.71°) and 30° (-1.07 ±â€¯2.52°) cuts differed significantly (p < 0.05) from smaller angle grafts. The mean (SD) absolute deviation was 0.81 mm (0.27) in length and 2.13° (0.93) in graft angles. For individual transplants, 45° cuts (1.28 ±â€¯1.03 mm) differed significantly (p < 0.005) from others. We observed no differences in relative length or absolute angle deviation. CONCLUSIONS: The MUC-Jig is precise and cost-effective for osteotomies with medium angles and smooth reconstructions of template-guided procedures.