This composite educational graphic illustrates three primary types of dentofacial disharmony (DFD) and malocclusion: Class I Anterior Open Bite (AOB), Class II, and Class III. Each category is represented by a lateral cephalogram (radiograph), a corresponding cephalometric tracing with linear and angular measurements, and a triplet of intraoral clinical photographs (frontal, right, and left views). The Class I AOB section demonstrates a high mandibular plane angle, increased lower facial height, and vertical spacing between the maxillary and mandibular incisors. The Class II presentation shows excessive overjet, proclined maxillary incisors, and a deep bite. The Class III section highlights mandibular prognathism characterized by a negative overjet (underbite) and compensatory incisor inclinations. The cephalometric tracings include key diagnostic values such as SNA, SNB, and ANB angles, Wits appraisal, and Frankfort Horizontal relationships. This visual resource is designed for orthodontic and maxillofacial surgery training to aid in the differential diagnosis of skeletal and dental alignment disorders.

Summary : This figure presents a classification system for medical recommendations, detailing the definitions and suggested wording for each class based on the strength and consensus of supporting evidence. table: # Classes of Recommendations : • Class I: Evidence and/or general agreement that a given treatment or procedure is beneficial, useful, effective. • Class II: Conflicting evidence and/or a divergence of opinion about the usefulness/efficacy of the given treatment or procedure. – Class IIa: Weight of evidence/opinion is in favour of usefulness/efficacy. – Class IIb: Usefulness/efficacy is less well established by evidence/opinion. • Class III: Evidence or general agreement that the given treatment or procedure is not useful/effective, and in some cases may be harmful. # Definitions : • Class I: "Evidence and/or general agreement that a given treatment or procedure is beneficial, useful, effective." • Class II: "Conflicting evidence and/or a divergence of opinion about the usefulness/efficacy of the given treatment or procedure." – Class IIa: "Weight of evidence/opinion is in favour of usefulness/efficacy." – Class IIb: "Usefulness/efficacy is less well established by evidence/opinion." • Class III: "Evidence or general agreement that the given treatment or procedure is not useful/effective, and in some cases may be harmful." # Wording to Use : • Class I: "Is recommended or is indicated" (green background) • Class IIa: "Should be considered" (yellow background) • Class IIb: "May be considered" (orange background) • Class III: "Is not recommended" (red background) # Design Encodings : • Colour coding: Green for Class I, yellow for Class IIa, orange for Class IIb, red for Class III. • Table format with three columns: Class, Definition, Wording to use. • Bold and coloured class names for emphasis. # Analysis : • The figure provides a clear, colour-coded hierarchy of recommendation strength, from strong positive (Class I) to strong negative (Class III). • Wording guidance aligns with the level of evidence and consensus, supporting consistent clinical communication. • The use of colour and structured layout enhances quick reference and usability for clinical decision-making.

Summary : This figure presents the "Classes of recommendations" used in clinical guidelines, categorizing treatments or procedures based on the strength of evidence and consensus, and specifying the recommended wording for each class. table/flowchart hybrid: Classes of Recommendations : • Class I: Evidence and/or general agreement that a treatment or procedure is beneficial, useful, effective. • Class II: Conflicting evidence and/or divergence of opinion about usefulness/efficacy. – Class IIa: Weight of evidence/opinion favors usefulness/efficacy. – Class IIb: Usefulness/efficacy is less well established by evidence/opinion. • Class III: Evidence or general agreement that a treatment or procedure is not useful/effective, and may be harmful. Definitions : • Class I: "Evidence and/or general agreement that a given treatment or procedure is beneficial, useful, effective." • Class II: "Conflicting evidence and/or a divergence of opinion about the usefulness/efficacy of the given treatment or procedure." – Class IIa: "Weight of evidence/opinion is in favour of usefulness/efficacy." – Class IIb: "Usefulness/efficacy is less well established by evidence/opinion." • Class III: "Evidence or general agreement that the given treatment or procedure is not useful/effective, and in some cases may be harmful." Wording to Use : • Class I: "Is recommended or is indicated" (green background) • Class IIa: "Should be considered" (yellow background) • Class IIb: "May be considered" (orange background) • Class III: "Is not recommended" (red background) Design Encodings : • Each class is color-coded: Class I (green), Class IIa (yellow), Class IIb (orange), Class III (red). • Table layout with three main columns: Class, Definition, Wording to use. • Hierarchical indentation for Class IIa and IIb under Class II. Analysis : • The figure provides a clear, color-coded framework for interpreting the strength of clinical recommendations, distinguishing between strong recommendations (Class I), varying degrees of uncertainty (Class IIa and IIb), and recommendations against use (Class III). The wording guidance standardizes how recommendations should be communicated in clinical documents.

Summary : This figure presents the classification system for medical recommendations, detailing the definitions and suggested wording for each class, as per the 2023 ESC guidelines. table: # Classes of Recommendations : • Class I: Evidence and/or general agreement that a given treatment or procedure is beneficial, useful, effective. • Class II: Conflicting evidence and/or a divergence of opinion about the usefulness/efficacy of the given treatment or procedure. • Class IIa: Weight of evidence/opinion is in favour of usefulness/efficacy. • Class IIb: Usefulness/efficacy is less well established by evidence/opinion. • Class III: Evidence or general agreement that the given treatment or procedure is not useful/effective, and in some cases may be harmful. # Definitions : • Class I: Treatment/procedure is beneficial, useful, effective. • Class II: Uncertainty or disagreement about usefulness/efficacy. • IIa: Evidence/opinion favours usefulness/efficacy. • IIb: Usefulness/efficacy less well established. • Class III: Treatment/procedure is not useful/effective, may be harmful. # Wording to Use : • Class I: "Is recommended" or "is indicated" (green background). • Class IIa: "Should be considered" (yellow background). • Class IIb: "May be considered" (orange background). • Class III: "Is not recommended" (red background). # Design Encodings : • Each class is colour-coded: Class I (green), Class IIa (yellow), Class IIb (orange), Class III (red). • Table layout with three columns: Class, Definition, Wording to use. • Class names in red font for emphasis. # Analysis : • The figure provides a clear, colour-coded framework for interpreting the strength and consensus behind medical recommendations. • Class I is the strongest recommendation, Class III is a strong negative recommendation, and Class II is subdivided to reflect varying degrees of uncertainty or support. • The wording guidance ensures consistent communication in clinical guidelines.

Summary : This figure presents the classification system for medical recommendations, detailing the definitions and suggested wording for each class, as per ESC 2023 guidelines. table: Classes of Recommendations : • Class I: Evidence and/or general agreement that a treatment or procedure is beneficial, useful, effective. • Class II: Conflicting evidence and/or divergence of opinion about usefulness/efficacy. – Class IIa: Weight of evidence/opinion is in favour of usefulness/efficacy. – Class IIb: Usefulness/efficacy is less well established by evidence/opinion. • Class III: Evidence or general agreement that the treatment or procedure is not useful/effective, and may be harmful. Definitions : • Class I: "Evidence and/or general agreement that a given treatment or procedure is beneficial, useful, effective." • Class II: "Conflicting evidence and/or a divergence of opinion about the usefulness/efficacy of the given treatment or procedure." – Class IIa: "Weight of evidence/opinion is in favour of usefulness/efficacy." – Class IIb: "Usefulness/efficacy is less well established by evidence/opinion." • Class III: "Evidence or general agreement that the given treatment or procedure is not useful/effective, and in some cases may be harmful." Wording to Use : • Class I: "Is recommended or is indicated" (green background). • Class IIa: "Should be considered" (yellow background). • Class IIb: "May be considered" (orange background). • Class III: "Is not recommended" (red background). Design Encodings : • Colour coding: Green for Class I, yellow for Class IIa, orange for Class IIb, red for Class III. • Table layout with three main columns: Class, Definition, Wording to use. • ESC 2023 copyright noted on the right. Analysis : • The figure provides a clear, colour-coded framework for interpreting the strength and consensus behind medical recommendations. • Class I is the strongest recommendation, Class III is a strong negative recommendation, and Class II is subdivided to reflect varying degrees of uncertainty or consensus. • The wording and colour scheme facilitate rapid identification of recommendation strength for clinical decision-making.

Summary : This figure presents the European Society of Cardiology (ESC) 2023 classification system for clinical recommendations, detailing the definitions and suggested wording for each class based on the strength and quality of evidence regarding a treatment or procedure's usefulness or harm. table: # Classes of Recommendations : • Class I: Evidence and/or general agreement that a treatment/procedure is beneficial, useful, effective. • Class II: Conflicting evidence and/or divergence of opinion about usefulness/efficacy. – Class IIa: Weight of evidence/opinion is in favour of usefulness/efficacy. – Class IIb: Usefulness/efficacy is less well established by evidence/opinion. • Class III: Evidence or general agreement that a treatment/procedure is not useful/effective, and may be harmful. # Definitions : • Class I: "Evidence and/or general agreement that a given treatment or procedure is beneficial, useful, effective." • Class II: "Conflicting evidence and/or a divergence of opinion about the usefulness/efficacy of the given treatment or procedure." – Class IIa: "Weight of evidence/opinion is in favour of usefulness/efficacy." – Class IIb: "Usefulness/efficacy is less well established by evidence/opinion." • Class III: "Evidence or general agreement that the given treatment or procedure is not useful/effective, and in some cases may be harmful." # Wording to Use : • Class I: "Is recommended or is indicated" (green background). • Class IIa: "Should be considered" (yellow background). • Class IIb: "May be considered" (orange background). • Class III: "Is not recommended" (red background). # Design Encodings : • Colour-coded backgrounds for each class: green (Class I), yellow (Class IIa), orange (Class IIb), red (Class III). • Class names in red font for emphasis. • Table divided into columns: Definition and Wording to use. • ESC 2023 copyright noted on the right edge. # Layout : • Table format with rows for each class and columns for definition and recommended wording. • Subdivision of Class II into IIa and IIb for more granular recommendations. # Analysis : • The figure provides a clear, colour-coded framework for interpreting the strength of clinical recommendations, ranging from strong endorsement (Class I) to explicit discouragement (Class III). • The wording guidance standardises how recommendations should be communicated in clinical guidelines, improving clarity and consistency. • The subdivision of Class II into IIa and IIb allows for nuanced recommendations when evidence is less definitive.

This comparative clinical photograph demonstrates the intraoperative visualization of a high-grade glioma (HGG) during neurosurgical resection using two different lighting modalities. Image (c) shows the surgical field under conventional white light, where the brain parenchyma, vascular structures, and the tumor bed are visible with typical anatomical colors; the tumor appears as heterogeneous dark and white tissue within a bloody surgical field. Image (d) displays the same surgical site under filtered light, utilizing fluorescence-guided surgery (FGS) techniques (likely 5-ALA induced protoporphyrin IX fluorescence). In this view, the malignant tumor tissue exhibits a vivid bright green fluorescence, significantly enhancing the contrast against the surrounding non-fluorescent normal brain tissue. Surgical instruments, including a metallic aspirator or probe, are seen positioned within the tumor cavity in both frames, indicating an active resection phase. This comparison illustrates how filtered light improves the identification of tumor margins and residual neoplastic tissue, facilitating a more complete extent of resection (EOR) compared to white light alone.

This clinical intraoperative photograph demonstrates the application of 5-aminolevulinic acid (5-ALA) fluorescence-guided surgery during the resection of a superficial glioblastoma. The image shows an exposed cerebral cortical surface viewed through a specialized operating microscope filter. A distinct region of bright pink fluorescence is visible, indicating the presence of malignant glioma cells where 5-ALA has been metabolized into fluorescent porphyrins. In contrast, the surrounding healthy brain parenchyma appears dark blue, providing high-contrast visual differentiation between neoplastic and normal tissue. Within the surgical field, surface vascular structures are visible as dark, branching lines traversing both the fluorescent and non-fluorescent regions. Surgical gauze and drapes are visible at the periphery of the craniotomy site. This imaging modality is utilized by neurosurgeons to achieve maximal cytoreduction and improve the extent of resection (EOR) by highlighting infiltrative tumor margins that may appear normal under standard white-light illumination.

This clinical photograph displays an intraoperative surgical field of the parotid gland region during a tumor resection, captured using fluorescence-guided surgery with a 560 nm yellow filter. The image demonstrates high-contrast visualization of neoplastic tissue against dark background anatomical structures. A large, lobulated mass in the upper left quadrant exhibits intense green fluorescence, indicating active accumulation of a fluorescent tracer within the tumor. In the center-right of the surgical bed, a small, discrete punctate area of fluorescence is marked with an asterisk (*), identifying a small nest of residual tumor or a satellite nodule that may not be easily visible under standard white light. The surrounding healthy tissues, including the facial nerve branches and background stroma, appear in dark reddish-brown tones with minimal to no fluorescence. This imaging technique is utilized in otorhinolaryngology to improve oncological margins and facilitate the identification of microscopic residual disease in complex anatomical regions like the parotid gland.

An intraoperative clinical photograph showing a neurosurgical field under blue light (400 nm) during a 5-aminolevulinic acid (5-ALA)-guided resection of a glioblastoma. The image demonstrates protoporphyrin IX (PpIX) fluorescence, a key diagnostic and surgical aid for identifying malignant tissue. In the center of the surgical cavity, the tumor bulk exhibits intense, well-defined red fluorescence. Surrounding this core, the tumor margins display a more diffuse, vague pink fluorescence, indicating transitional areas of tumor infiltration. The background healthy brain tissue appears predominantly dark or blue due to the absence of significant PpIX accumulation, providing a high-contrast visual guide for maximal safe resection. This image illustrates the clinical application of fluorescence-guided surgery in neuro-oncology for the intraoperative differentiation between high-grade glioma tissue and normal brain parenchyma.