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The uncertainty of true labels in medical images hinders diagnosis owing to the variability across professionals when applying deep learning models. We used deep learning to obtain an optimal convolutional neural network (CNN) by adequately annotating data for oral exfoliative cytology considering labels from multiple oral pathologists. Six whole-slide images were processed using QuPath for segmenting them into tiles. The images were labeled by three oral pathologists, resulting in 14,535 images with the corresponding pathologists' annotations. Data from three pathologists who provided the same diagnosis were labeled as ground truth (GT) and used for testing. We investigated six models trained using the annotations of (1) pathologist A, (2) pathologist B, (3) pathologist C, (4) GT, (5) majority voting, and (6) a probabilistic model. We divided the test by cross-validation per slide dataset and examined the classification performance of the CNN with a ResNet50 baseline. Statistical evaluation was performed repeatedly and independently using every slide 10 times as test data. For the area under the curve, three cases showed the highest values (0.861, 0.955, and 0.991) for the probabilistic model. Regarding accuracy, two cases showed the highest values (0.988 and 0.967). For the models using the pathologists and GT annotations, many slides showed very low accuracy and large variations across tests. Hence, the classifier trained with probabilistic labels provided the optimal CNN for oral exfoliative cytology considering diagnoses from multiple pathologists. These results may lead to trusted medical artificial intelligence solutions that reflect diverse diagnoses of various professionals.
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Aprendizaje Profundo , Redes Neurales de la Computación , Humanos , Citodiagnóstico/métodos , Procesamiento de Imagen Asistido por Computador/métodos , Neoplasias de la Boca/diagnóstico , Neoplasias de la Boca/patología , PatólogosRESUMEN
BACKGROUND: This retrospective clinical study investigated risk factors for infection following bilateral sagittal split ramus osteotomy (BSSO) as orthognathic surgery, including the patients' general condition, local factors, and surgical factors. PATIENTS AND METHODS: The cases of 160 mandibular sites of 80 Japanese patients (26 males, 54 females; mean ± SD age: 25.3 ± 7.7 years, range 16-55 yrs) with a jaw deformity who underwent BSSO orthognathic surgery at our Department of Oral and Maxillofacial Surgery between Jan. 2017 and Dec. 2022 were analyzed. Potential risk factors were classified as clinical predictive variables. Descriptive and univariate statistics were computed. A multivariate analysis was performed with logistic regression. RESULTS: Fifteen mandibular sites (9.4 %) were complicated with postoperative infection. The multivariate analysis revealed significant differences in facial asymmetry (OR 24.0, p = 0.0002) and the amount of mandibular movement (OR 0.664, p = 0.011) between the sites with and without infection. CONCLUSIONS: Among clinical variables, facial asymmetry was the strongest risk factor for post-BSSO infection, followed by the amount of mandibular movement.
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Asimetría Facial , Osteotomía Sagital de Rama Mandibular , Masculino , Femenino , Humanos , Adolescente , Adulto Joven , Adulto , Persona de Mediana Edad , Osteotomía Sagital de Rama Mandibular/efectos adversos , Estudios Retrospectivos , Asimetría Facial/epidemiología , Asimetría Facial/cirugía , Asimetría Facial/etiología , Mandíbula/cirugía , Complicaciones Posoperatorias/etiología , Factores de RiesgoRESUMEN
Wisdom tooth extraction is one of the most commonly performed procedures by oral maxillofacial surgeons. Delayed-onset infection (DOI) is a rare complication of wisdom tooth extraction, and it occurs ~1-4 weeks after the extraction. In the present study, risk factors for DOI were investigated by retrospectively analyzing the cases of 1400 mandibular wisdom tooth extractions performed at Kagawa University Hospital from April 2015 to June 2022. Inclusion criteria were patients aged >15 years with a wisdom tooth extraction per our procedure. The exclusion criteria were patients with insufficient medical records, a >30-mm lesion around the wisdom tooth shown via X-ray, colonectomy, radiotherapy treatment of the mandible, the lack of panoramic images, and lesions other than a follicular cyst. The DOI incidence was 1.1% (16 cases), and univariate analyses revealed that the development of DOI was significantly associated with the Winter classification (p = 0.003), position (p = 0.003), hypertension (p = 0.011), and hemostatic agent use (p = 0.004). A multivariate logistic regression analysis demonstrated that position (OR = B for A, 7.75; p = 0.0163), hypertension (OR = 7.60, p = 0.013), and hemostatic agent use (OR = 6.87, p = 0.0022) were significantly associated with DOI development. Hypertension, hemostatic use, and position were found to be key factors for DOI; long-term observation may thus be necessary for patients with these risk factors.
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OBJECTIVES: This study aimed to clarify the relationship between the oral assessment guide (OAG), a simple method for assessing oral function and poor nutrition in gastric cancer patients and investigate the reduction of oral mucositis through appropriate oral function management. SUBJECTS AND METHODS: Gastric cancer patients who underwent chemotherapy at the Nagoya Ekisaikai Hospital between January 2015 and December 2020 were evaluated. The prognostic nutritional index (PNI), as the objective variable, was used to assess nutritional status. The explanatory variables were sex, age, smoking status, body mass index (BMI), number of remaining teeth, cancer stage, albumin level, C-reactive protein level, white blood cell count and the OAG score. RESULTS: PNI was significantly associated with age, number of remaining teeth, cancer stage and the OAG score (p < 0.05) among the 217 patients. There were significant differences in age, BMI, cancer stage and the OAG score among the patients. An abnormal BMI and an advanced cancer stage were more common in older patients, and abnormal OAG scores were associated with a lower PNI. CONCLUSIONS: For gastric cancer patients undergoing postoperative chemotherapy, worse oral functional status is associated with worse PNI and nutritional status.
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Estado Nutricional , Neoplasias Gástricas , Humanos , Anciano , Neoplasias Gástricas/complicaciones , Neoplasias Gástricas/tratamiento farmacológico , Neoplasias Gástricas/cirugía , Pronóstico , Estudios Retrospectivos , Evaluación NutricionalRESUMEN
OBJECTIVES: Nutritional status is a useful prognostic factor in gastric cancer patients. Since oral hypofunction may cause undernutrition, we cross-sectionally investigated whether the Geriatric Nutritional Risk Index (GNRI) is affected by the number of remaining teeth, occlusal support status and denture use. MATERIALS AND METHODS: The participants were 114 patients diagnosed with gastric cancer between April 2017 and March 2020. The stage of gastric cancer, body mass index, albumin level, total lymphocyte count, C-reactive protein level and GNRI were evaluated. The number of remaining teeth was also evaluated, and the occlusion state was determined based on the Eichner classification. The patients were divided into three main groups representing different occlusal states based on the Eichner index and were also categorised based on denture use. RESULTS: The mean age ± standard deviation of the patients was 75.2 ± 5.5 years. The Eichner classification had a significant positive correlation with GNRI. Low GNRI was associated with a poor occlusal state in group C, while a higher GNRI was associated with a stable occlusal state in group A. However, the denture-related groups showed no significant differences in GNRI. CONCLUSION: The GNRI was associated with the occlusal support level but not with denture use.
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Desnutrición , Neoplasias Gástricas , Humanos , Anciano , Evaluación Nutricional , Neoplasias Gástricas/complicaciones , Estado Nutricional , Desnutrición/etiología , Índice de Masa Corporal , Pronóstico , Factores de Riesgo , Estudios RetrospectivosRESUMEN
BACKGROUND: Functional impairment after third molar extraction may decrease the food intake. Elucidation of associated factors will contribute to a more appropriate postoperative nutritional management, and was the aim of the present study. METHODS: Adults aged < 60 years who were admitted for an extraction of one or more mandibular third molars were included. Those with diabetes mellitus, anemia, metabolic diseases, mental retardation, altered dietary intake, and postoperative paralysis of the lower lip and tongue were excluded. Patient-specific risk factors were compared in relation to a decrease in the food intake on postoperative day 1. Multivariate analysis took into account the patients' background factors. RESULTS: A total of 254 patients were included (median age: 26.8 ± 9.3 years, 142 women); 508 third molars were extracted. Postoperative dietary intake reduction was more common (p < 0.05) after an exclusively mandibular extraction (16.0%) than after an extraction including the maxilla (29.4%). The reduction was also more common (p < 0.05) for an extraction difficulty of Pell-Gregory class III (39.5%) than for extraction difficulties of Pell-Gregory classes I (22.6%) and II (21.3%). The reduction was also more common (p < 0.05) in patients who experienced postoperative pain (66.7%) than in those who did not (23.3%). Significant differences were observed in sex (women: 34.5%, men: 11.6%) and age (young patients [< 26 years]: 31.1%, adult patients [≥ 26 years]: 17.2%); however, no significant difference was found in terms of experiencing trismus (p < 0.11). Simple regression analysis showed significant differences between patients who did and did not have a reduced postoperative food intake depending on the sex, age, extraction site, degree of extraction difficulty, trismus, and postoperative pain. Reduced dietary intake was significantly associated with sex (odds ratio [OR]: 0.30; 95% confidence interval [CI]: 0.14-0.38), age (OR: 1.6; 95% CI: 1.0-2.5), extraction site (OR: 0.51; 95% CI: 0.31-0.83), difficulty of extraction (OR: 0.66; 95% CI: 0.50-0.88), and postoperative pain (OR: 0.12; 95% CI: 0.04-0.37). CONCLUSIONS: A younger age, female sex, extraction including the maxilla with deep implantation, and complaints of pain on postoperative day 1 were factors associated with a decreased food intake after third molar extraction.
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Tercer Molar , Diente Impactado , Adolescente , Adulto , Estudios Transversales , Ingestión de Alimentos , Edema/etiología , Femenino , Humanos , Masculino , Tercer Molar/cirugía , Dolor Postoperatorio , Diente Impactado/cirugía , Trismo/etiología , Adulto JovenRESUMEN
ABSTRACT: The incidence of accidental ingestion and aspiration of foreign body (FB) is likely to occur. Many FBs are discharged spontaneously, but many dental FBs are often sharp and may remain in the pharynx, esophagus, and stomach, causing serious complications such as hemorrhage, asphyxia, perforation of the digestive tract, mediastinal emphysema, peritonitis, and ileus. We aimed to examine which type of dental foreign bodies can be removed by endoscope.In this study, we enrolled 32 patients who were evaluated at the Emergency and Critical Center between January 2014 and December 2019 and who accidentally ingested or aspirated dental FBs. Medical records were reviewed to determine the patients' sex, age, medical history, time from accidental ingestion of a FB to consultation, cause, location, occurrence status, nature of the FB, location of retained FB, treatment, complications, and outcome.We enrolled 32 patients (14 men, 18 women), with a mean age of 74.5â±â12.8 years. Accidental ingestion at treatment was common. The most frequent site where the FB was retained was upper gastrointestinal tract (26 cases, 81.3%). In this study, endoscopic removal was indicated for dentures under the size of 43.3âmm, for dental FB (except dentures) more than 13.6âmm. In dentures, between the number of missing teeth, clasp, type, and endoscopic removal was not statistically significant.Dentures under the size of 43.3âmm was likely to be removed by endoscope. Dental FB (except dentures) more than the size of 13.6âmm was likely to be removed by endoscope. There were no indications for endoscopic removal except for size.
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Endoscopía , Cuerpos Extraños/cirugía , Accidentes , Anciano , Anciano de 80 o más Años , Estudios Transversales , Operatoria Dental , Esófago , Femenino , Humanos , Japón/epidemiología , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Resultado del TratamientoRESUMEN
ABSTRACT: In oral cancer surgery, the decision to perform a tracheotomy is often determined by the surgeon. In this study, we investigated the competency of clinical scoring systems in identifying patients who require tracheotomy and examined the degree of agreement between the surgeon's decision and the indications of various scoring systems. We identified 110 patients who were surgically treated for oral cancer. Of these, 67 patients (44 men and 23 women) who underwent resection and reconstruction were retrospectively analyzed. To derive the score, we evaluated the endpoint of the airway management score using clinical records and images. We divided the patients into two groups based on the Cameron and Gupta scores (tracheotomy and no-tracheotomy groups) and evaluated the degree of agreement with the surgeon's decision by calculating the κ coefficient. The κ coefficients of the Gupta and Cameron scores were 0.61 (95% confidence interval [CI]: 0.40-0.82) and 0.60 (95% CI: 0.38-0.82), respectively. The clinical evaluation of the κ coefficient indicated that the Cameron and Gupta scores agreed fairly with the surgeon's decision. In this study, the Cameron and Gupta scores fairly agreed with the decision of experienced surgeons and were confirmed as acceptable guides for making clinical judgments.
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Neoplasias de la Boca/cirugía , Índice de Severidad de la Enfermedad , Traqueotomía , Adulto , Anciano , Anciano de 80 o más Años , Toma de Decisiones Clínicas , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios RetrospectivosRESUMEN
BACKGROUND: A better understanding of the risk factors for postoperative nausea and vomiting (PONV) could improve patient outcomes. This study aimed to analyze the risk factors for PONV and its onset after third molar impaction surgery, and to demonstrate the importance of controlling anesthesia-related factors regardless of patient-specific factors. METHODS: We included patients who reported nausea and vomiting within 12 h of extubation. Patients with incomplete data, those who could not communicate, and those with gastrointestinal disorders were excluded. We evaluated patient-specific risk factors, and the use of volatile anesthetics and intraoperative fentanyl anesthetic-related factors. Multiple logistic regression analysis was performed taking patient background factors into account. RESULTS: In total, 182 patients who underwent disimpaction of the third molar under general anesthesia between January 2017 and December 2018 at Nagoya Ekisaikai Hospital, were included. Approximately 12.6% (n = 23) patients experienced PONV, with no significant difference in terms of sex, smoking status, age, and body mass index compared to patients without PONV. Multiple logistic regression analysis revealed no interaction between fentanyl and volatile anesthetics. The major risk factor for PONV was the use of volatile anesthetics. Patients in whom anesthesia was maintained by volatile anesthetics were 13.35 times more likely to have PONV than those in whom total intravenous anesthesia was induced (P < 0.001). CONCLUSION: Maintenance of anesthesia with volatile anesthetics is a risk factor for PONV.
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Tercer Molar , Náusea y Vómito Posoperatorios , Anestesia General/efectos adversos , Estudios Transversales , Humanos , Tercer Molar/cirugía , Náusea y Vómito Posoperatorios/epidemiología , Náusea y Vómito Posoperatorios/etiología , Factores de RiesgoRESUMEN
BACKGROUND: The systemic inflammatory response and nutritional status of patients with malignant tumors are related to postoperative results. We examined the usefulness of the prognostic nutritional index (PNI) as a prognostic tool in patients with oral squamous cell carcinoma who underwent radical surgery. METHODS: From 2008 to 2019, 102 patients (73 males, 29 females; age, 65.6 ± 9.8 years) who visited our hospital and underwent surgical therapy were included in this study. The endpoint was the total survival period, and the evaluation markers included the lymphocyte count and albumin level in peripheral blood obtained 4 weeks preoperatively, age, sex, alcohol consumption, smoking history, site of the tumor, pathological stage, and surgery status. The PNI was calculated using serum albumin levels and the peripheral blood lymphocyte count. The relationship between the PNI and patient characteristics were analyzed using Fisher's exact test. The Kaplan-Meier method was used to evaluate the survival rate. The survival periods were compared using the log-rank method. We evaluated the prognostic factors for overall survival (OS) and disease-free survival (DFS) in a logistic regression model. RESULTS: The tumor sites included the maxilla (n = 12), buccal mucosa (n = 11), mandible (n = 17), floor of the mouth (n = 9), and tongue (n = 53). The number of patients with stage I, II, III, and IV oral cancers was 28 (27.5%), 34 (27.5%), 26 (33.3%), and 14 (13.7%), respectively. During the observation period, 21 patients died of head and neck cancer. The optimal cut-off PNI value was 42.9, according to the receiver operating characteristic analysis. The proportion of patients with a short OS was lower in those with PNI higher than 42.9, and the 5-year OS in patients with PNI higher and lower than the cut-off value was 62.3% and 86.0%, respectively (P = 0.0105). CONCLUSIONS: The OS of patients with PNI < 42.9 was lower than that of patients with PNI ≥ 42.9. The PNI, which is a preoperative head-to-foot inflammatory marker, can help in estimating the prognosis of oral cancer.
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Carcinoma de Células Escamosas , Neoplasias de la Boca , Anciano , Carcinoma de Células Escamosas/cirugía , Femenino , Humanos , Masculino , Persona de Mediana Edad , Neoplasias de la Boca/cirugía , Evaluación Nutricional , Estado Nutricional , Pronóstico , Estudios Retrospectivos , Carcinoma de Células Escamosas de Cabeza y CuelloRESUMEN
OBJECTIVE: Systemic inflammatory responses in cancer patients are important factors for nutrition and prognosis. This study evaluates the association between tooth loss, occlusal status, and prognostic nutritional index (PNI). METHODS: A total of 93 patients with gastric cancer were included. These parameters were investigated the following: stage, body mass index (BMI), total lymphocyte count, C-reactive protein (CRP), PNI, and albumin (ALB). Patients were divided into three groups by Eichner classification (group A had contact in four support zones; group B had in one to three zones or in anterior region; and group C had no contact). PNI assumed 40 or less undernutrition. Multiple regression analysis was performed (PNI, dependent variable; Eichner index, main independent variable), using four independent variables (sex, age, BMI, and CRP) as adjustment factors. RESULTS: The mean ± SD PNI in groups A, B, and C was 43.0 ± 4.7, 41.7 ± 5.2, and 36.7 ± 7.7, respectively. A significant positive correlation was found between the number of teeth, both ALB, and PNI. ALB and PNI differed significantly between groups A and C (ALB, p = .0003; PNI, p = .005). CONCLUSION: We recommend a preoperative dental evaluation for assessing the nutritional status of patients with gastric cancer.