Hanau Articulator and the Mechanics of the Gnathic System

const pptxgen = require("pptxgenjs");
const { execSync } = require("child_process");

// ── Color Palette ──────────────────────────────────────────────────────────
const NAVY    = "0D1B3E";   // dominant dark bg
const TEAL    = "0A8F8F";   // accent / highlights
const GOLD    = "D4A82A";   // secondary accent
const WHITE   = "FFFFFF";
const LGRAY   = "EAF0F6";   // light card bg
const MIDGRAY = "8CA0B8";   // subdued text
const ORANGE  = "E8622A";   // call-out accent

const pres = new pptxgen();
pres.layout  = "LAYOUT_WIDE";   // 13.3" × 7.5"
pres.author  = "Orris AI";
pres.title   = "Posselt's Envelope of Motion";
pres.subject = "Prosthodontics / Dental Occlusion";

// ── Fetch remote images as base64 ─────────────────────────────────────────
const IMG_ENVELOPE  = "https://cdn.orris.care/image-gen/af009503bd7241a897b42af7054e868a.png";
const IMG_CLINICAL  = "https://cdn.orris.care/image-gen/7a25d2fe62b74b6ea9f134ed406c7ccc.png";
const IMG_POSITIONS = "https://cdn.orris.care/image-gen/5afb03ba83a14f2590d661f0a3864b2c.png";

console.log("Fetching images…");
const imgs = JSON.parse(
  execSync(
    `node /home/daytona/skills/shared/scripts/fetch_images.js "${IMG_ENVELOPE}" "${IMG_CLINICAL}" "${IMG_POSITIONS}"`
  ).toString()
);
const [imgEnvelope, imgClinical, imgPositions] = imgs;
console.log("Images fetched:", imgs.map(i => i.error || "OK"));

// ══════════════════════════════════════════════════════════════════════════
// Helper: dark full-bleed background
function darkBg(slide) {
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    x: 0, y: 0, w: 13.3, h: 7.5,
    fill: { color: NAVY }, line: { color: NAVY }
  });
}

// Helper: accent top bar
function topBar(slide, color = TEAL) {
  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0, y: 0, w: 13.3, h: 0.08,
    fill: { color }, line: { color }
  });
}

// Helper: section label chip
function chip(slide, text, x, y, bg = TEAL) {
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    x, y, w: 2.2, h: 0.32,
    fill: { color: bg }, line: { color: bg }, rectRadius: 0.06
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  slide.addText(text.toUpperCase(), {
    x, y, w: 2.2, h: 0.32,
    fontSize: 9, bold: true, color: WHITE,
    align: "center", valign: "middle", margin: 0
  });
}

// Helper: slide heading on white/light slide
function lightHeading(slide, title, subtitle = "") {
  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0, y: 0, w: 13.3, h: 1.05,
    fill: { color: NAVY }, line: { color: NAVY }
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  topBar(slide, GOLD);
  slide.addText(title, {
    x: 0.5, y: 0.12, w: 12.3, h: 0.6,
    fontSize: 26, bold: true, color: WHITE, fontFace: "Calibri",
    align: "left", valign: "middle", margin: 0
  });
  if (subtitle) {
    slide.addText(subtitle, {
      x: 0.5, y: 0.7, w: 12.3, h: 0.3,
      fontSize: 13, color: GOLD, fontFace: "Calibri", italic: true,
      align: "left", valign: "middle", margin: 0
    });
  }
}

// ══════════════════════════════════════════════════════════════════════════
// SLIDE 1 — Title Slide
// ══════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  darkBg(s);
  topBar(s, GOLD);

  // Left vertical accent bar
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    x: 0, y: 0.08, w: 0.06, h: 7.42,
    fill: { color: TEAL }, line: { color: TEAL }
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  // Decorative large circle (background element)
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    x: 7.8, y: -1.2, w: 7, h: 7,
    fill: { color: "0F2555", transparency: 30 }, line: { color: "0F2555", transparency: 30 }
  });
  s.addShape(pres.shapes.OVAL, {
    x: 8.5, y: -0.5, w: 5.5, h: 5.5,
    fill: { color: "0A3070", transparency: 20 }, line: { color: "0A3070", transparency: 20 }
  });

  // Topic chip
  chip(s, "Prosthodontics", 0.6, 1.4, TEAL);

  // Main title
  s.addText("Posselt's Envelope", {
    x: 0.6, y: 1.9, w: 9, h: 1.0,
    fontSize: 48, bold: true, color: WHITE, fontFace: "Calibri",
    align: "left", valign: "middle", margin: 0
  });
  s.addText("of Motion", {
    x: 0.6, y: 2.85, w: 9, h: 0.85,
    fontSize: 48, bold: true, color: GOLD, fontFace: "Calibri",
    align: "left", valign: "middle", margin: 0
  });

  // Subtitle
  s.addText("Three-Dimensional Limits of Mandibular Movement\nand Clinical Implications in Prosthodontics", {
    x: 0.6, y: 3.75, w: 8.5, h: 0.85,
    fontSize: 16, color: MIDGRAY, fontFace: "Calibri", italic: true,
    align: "left", valign: "top", margin: 0
  });

  // Bottom metadata
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    x: 0, y: 6.85, w: 13.3, h: 0.65,
    fill: { color: "091630" }, line: { color: "091630" }
  });
  s.addText("Ulf Posselt  |  1952  |  Department of Prosthodontics  |  Dental Occlusion & Gnathology", {
    x: 0.6, y: 6.88, w: 12, h: 0.55,
    fontSize: 11, color: MIDGRAY, fontFace: "Calibri",
    align: "left", valign: "middle", margin: 0
  });
}

// ══════════════════════════════════════════════════════════════════════════
// SLIDE 2 — What is Posselt's Envelope?
// ══════════════════════════════════════════════════════════════════════════
{
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  s.addShape(pres.shapes.RECTANGLE, {
    x: 0, y: 0, w: 13.3, h: 7.5,
    fill: { color: LGRAY }, line: { color: LGRAY }
  });
  lightHeading(s, "What is Posselt's Envelope of Motion?", "Definition & Historical Context");

  // Left text panel
  const boxW = 5.8;
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x: 0.4, y: 1.2, w: boxW, h: 5.9,
    fill: { color: WHITE }, line: { color: "D0DCE8" }, rectRadius: 0.12,
    shadow: { type: "outer", color: "000000", blur: 8, offset: 2, angle: 135, opacity: 0.1 }
  });

  s.addText([
    { text: "Definition", options: { bold: true, color: NAVY, fontSize: 15, breakLine: true } },
    { text: "\n", options: { fontSize: 6, breakLine: true } },
    { text: "The three-dimensional space within which ALL mandibular movements occur. It represents the outer boundary — or \"border movements\" — of the jaw.", options: { color: "333333", fontSize: 12.5, breakLine: true } },
    { text: "\n", options: { fontSize: 8, breakLine: true } },
    { text: "Historical Background", options: { bold: true, color: NAVY, fontSize: 15, breakLine: true } },
    { text: "\n", options: { fontSize: 6, breakLine: true } },
    { text: "Described by Swedish prosthodontist Ulf Posselt in 1952, based on stereoscopic recordings of incisor point movements.", options: { color: "333333", fontSize: 12.5, breakLine: true } },
    { text: "\n", options: { fontSize: 8, breakLine: true } },
    { text: "Key Principle", options: { bold: true, color: NAVY, fontSize: 15, breakLine: true } },
    { text: "\n", options: { fontSize: 6, breakLine: true } },
    { text: "All voluntary jaw movements lie INSIDE the envelope. The borders are determined by the TMJ ligaments, articular surfaces, and teeth — not by muscles alone.", options: { color: "333333", fontSize: 12.5, breakLine: true } },
    { text: "\n", options: { fontSize: 8, breakLine: true } },
    { text: "Clinical Relevance", options: { bold: true, color: NAVY, fontSize: 15, breakLine: true } },
    { text: "\n", options: { fontSize: 6, breakLine: true } },
    { text: "Any restoration or prosthesis must be designed to function harmoniously within this envelope — violations cause occlusal interference, TMD, or prosthetic failure.", options: { color: "333333", fontSize: 12.5, breakLine: true } },
  ], { x: 0.7, y: 1.3, w: 5.2, h: 5.7, valign: "top", margin: 8 });

  // Right: quote card + stats
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x: 6.8, y: 1.2, w: 6.1, h: 2.2,
    fill: { color: NAVY }, line: { color: NAVY }, rectRadius: 0.12
  });
  s.addText([
    { text: "\"", options: { fontSize: 40, color: GOLD, bold: true } },
    { text: "The movement of the mandible is limited in every direction by a three-dimensional envelope that can be reproducibly recorded.\"\n", options: { fontSize: 13.5, color: WHITE, italic: true } },
    { text: "— Ulf Posselt, 1952", options: { fontSize: 11, color: GOLD } }
  ], { x: 7.0, y: 1.3, w: 5.7, h: 2.0, valign: "top", margin: 6 });

  // Three stat cards
  const stats = [
    { val: "1952", label: "Year Described" },
    { val: "~50mm", label: "Max Opening" },
    { val: "3D", label: "Spatial Model" },
  ];
  stats.forEach((st, i) => {
    const sx = 6.8 + i * 2.05;
    s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
      x: sx, y: 3.7, w: 1.9, h: 1.55,
      fill: { color: WHITE }, line: { color: TEAL, pt: 2 }, rectRadius: 0.1
    });
    s.addText(st.val, {
      x: sx, y: 3.75, w: 1.9, h: 0.85,
      fontSize: 28, bold: true, color: TEAL, align: "center", valign: "middle", margin: 0
    });
    s.addText(st.label, {
      x: sx, y: 4.55, w: 1.9, h: 0.55,
      fontSize: 10.5, color: NAVY, align: "center", valign: "top", margin: 2
    });
  });

  // Two points at bottom right
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x: 6.8, y: 5.55, w: 6.1, h: 1.52,
    fill: { color: "EEF4FB" }, line: { color: "D0DCE8" }, rectRadius: 0.1
  });
  s.addText([
    { text: "▸ ", options: { color: TEAL, bold: true } },
    { text: "Tooth contacts occur only along the superior border — NOT within the envelope body.\n", options: { color: "333333", fontSize: 12 } },
    { text: "▸ ", options: { color: TEAL, bold: true } },
    { text: "Functional chewing movements use only a small fraction of the total envelope.", options: { color: "333333", fontSize: 12 } }
  ], { x: 7.0, y: 5.65, w: 5.7, h: 1.3, valign: "top", margin: 4 });
}

// ══════════════════════════════════════════════════════════════════════════
// SLIDE 3 — The Envelope Diagram (Sagittal + Frontal)
// ══════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  s.addShape(pres.shapes.RECTANGLE, {
    x: 0, y: 0, w: 13.3, h: 7.5,
    fill: { color: LGRAY }, line: { color: LGRAY }
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  lightHeading(s, "The Envelope — Sagittal & Frontal Views", "Border movements in two planes");

  if (imgEnvelope && !imgEnvelope.error) {
    s.addImage({ data: imgEnvelope.base64, x: 0.3, y: 1.1, w: 12.7, h: 6.1 });
  } else {
    s.addText("Envelope diagram unavailable", { x: 1, y: 3, w: 11, h: 1, fontSize: 16, color: "999999", align: "center" });
  }
}

// ══════════════════════════════════════════════════════════════════════════
// SLIDE 4 — Key Border Positions
// ══════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  s.addShape(pres.shapes.RECTANGLE, {
    x: 0, y: 0, w: 13.3, h: 7.5,
    fill: { color: LGRAY }, line: { color: LGRAY }
  });
  lightHeading(s, "Key Border Positions Within the Envelope", "Six critical mandibular reference points");

  if (imgPositions && !imgPositions.error) {
    s.addImage({ data: imgPositions.base64, x: 0.3, y: 1.05, w: 12.7, h: 6.2 });
  } else {
    s.addText("Positions diagram unavailable", { x: 1, y: 3, w: 11, h: 1, fontSize: 16, color: "999999", align: "center" });
  }
}

// ══════════════════════════════════════════════════════════════════════════
// SLIDE 5 — Border Movements Explained
// ══════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  s.addShape(pres.shapes.RECTANGLE, {
    x: 0, y: 0, w: 13.3, h: 7.5,
    fill: { color: LGRAY }, line: { color: LGRAY }
  });
  lightHeading(s, "Border Movements in Detail", "Sagittal plane — four borders of the envelope");

  const borders = [
    {
      title: "1.  Posterior Superior Border",
      color: TEAL,
      body: "The Terminal Hinge Arc: pure rotation of condyles in centric relation. From CR closure through ~25mm of mouth opening. Reproducible — used as the reference in prosthodontics. Represents \"retruded contact position\" at tooth contact.",
    },
    {
      title: "2.  Superior Occlusal Border",
      color: GOLD,
      body: "From RCP (retruded contact) sliding forward to centric occlusion (CO/MIP), then forward to maximum protrusion (~8-10mm). Tooth contacts define this border. The CR-CO slide is 0-1mm anteriorly — called \"long centric\" or freedom in centric.",
    },
    {
      title: "3.  Anterior-Inferior Border",
      color: ORANGE,
      body: "Maximum protrusion combined with increasing mouth opening. The mandible is at its most forward position throughout this movement. The path curves downward and backward to maximum opening.",
    },
    {
      title: "4.  Posterior-Inferior Border",
      color: "7B5EA7",
      body: "Maximum opening (~50mm) back to the most retruded open position. Represents the inferior and posterior limit of movement. Condyles are translated maximally forward at peak opening, then retruded back toward CR.",
    },
  ];

  borders.forEach((b, i) => {
    const col = i < 2 ? 0 : 1;
    const row = i % 2;
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    const y = 1.25 + row * 2.85;
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      x, y, w: 6.1, h: 2.65,
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      shadow: { type: "outer", color: "000000", blur: 6, offset: 2, angle: 135, opacity: 0.08 }
    });
    // Color accent left bar
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      x, y: y + 0.1, w: 0.07, h: 2.45,
      fill: { color: b.color }, line: { color: b.color }
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    s.addText(b.title, {
      x: x + 0.2, y: y + 0.12, w: 5.7, h: 0.45,
      fontSize: 13.5, bold: true, color: NAVY, fontFace: "Calibri",
      align: "left", valign: "middle", margin: 0
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      x: x + 0.2, y: y + 0.6, w: 5.7, h: 1.9,
      fontSize: 12, color: "333333", fontFace: "Calibri",
      align: "left", valign: "top", margin: 4
    });
  });
}

// ══════════════════════════════════════════════════════════════════════════
// SLIDE 6 — CR vs CO: The Critical Discrepancy
// ══════════════════════════════════════════════════════════════════════════
{
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  darkBg(s);
  topBar(s, GOLD);

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    x: 0.6, y: 0.18, w: 12, h: 0.65,
    fontSize: 26, bold: true, color: WHITE, fontFace: "Calibri", margin: 0
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  s.addText("Understanding the CR-CO slide and its clinical importance", {
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    fontSize: 13, color: GOLD, italic: true, fontFace: "Calibri", margin: 0
  });

  // Two main boxes
  const items = [
    {
      label: "CENTRIC RELATION (CR)",
      color: TEAL,
      pts: [
        "Most superior, anterior position of both condyles in glenoid fossa",
        "Ligament-determined — independent of tooth contacts",
        "Reproducible — used as reference for complete dentures and occlusal rehab",
        "Also called: Retruded contact position (RCP) at initial tooth contact",
        "Recorded by: bimanual manipulation, chin-point guidance, leaf gauge",
      ]
    },
    {
      label: "CENTRIC OCCLUSION (CO) / MIP",
      color: GOLD,
      pts: [
        "Position of maximum tooth intercuspation — muscle-determined",
        "Normal: 0-1mm ANTERIOR and slightly superior to CR",
        "Does NOT coincide with CR in ~90% of natural dentitions",
        "Goal of occlusal rehabilitation: bring CR = CO (or allow freedom in centric)",
        "Large CR-CO discrepancy = potential TMD risk; requires treatment planning",
      ]
    }
  ];

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      x, y: 1.25, w: 6.1, h: 0.5,
      fill: { color: item.color }, line: { color: item.color }
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    s.addText(item.label, {
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      fontSize: 13, bold: true, color: WHITE, fontFace: "Calibri", margin: 0,
      align: "left", valign: "middle"
    });
    const bullets = item.pts.map((p, j) => ({
      text: p,
      options: { bullet: { type: "bullet" }, color: j === 0 ? WHITE : "B0C8E0", fontSize: 12.5, breakLine: j < item.pts.length - 1 }
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    s.addText(bullets, {
      x: x + 0.2, y: 1.85, w: 5.7, h: 4.1,
      fontFace: "Calibri", valign: "top", margin: 4
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  // Bottom banner
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    x: 0.4, y: 6.25, w: 12.5, h: 0.95,
    fill: { color: GOLD, transparency: 10 }, line: { color: GOLD }, rectRadius: 0.08
  });
  s.addText([
    { text: "Clinical Rule: ", options: { bold: true, color: NAVY, fontSize: 13.5 } },
    { text: "In complete denture construction, ALWAYS use CR as the reference — CO cannot be reproduced without natural teeth. In fixed prosthodontics, identify CR-CO discrepancy BEFORE initiating treatment.", options: { color: NAVY, fontSize: 13 } }
  ], { x: 0.65, y: 6.3, w: 12, h: 0.82, valign: "middle", margin: 4 });
}

// ══════════════════════════════════════════════════════════════════════════
// SLIDE 7 — Lateral Envelope & Bennett Movement
// ══════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  s.addShape(pres.shapes.RECTANGLE, {
    x: 0, y: 0, w: 13.3, h: 7.5,
    fill: { color: LGRAY }, line: { color: LGRAY }
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  lightHeading(s, "Lateral Envelope & Bennett Movement", "Frontal plane and working/non-working condyle paths");

  // Left: Bennett explanation
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x: 0.4, y: 1.2, w: 5.6, h: 5.9,
    fill: { color: WHITE }, line: { color: "D0DCE8" }, rectRadius: 0.12,
    shadow: { type: "outer", color: "000000", blur: 8, offset: 2, angle: 135, opacity: 0.08 }
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  s.addText([
    { text: "Bennett Movement\n", options: { bold: true, color: NAVY, fontSize: 15, breakLine: true } },
    { text: "Named after Norman G. Bennett (1906). The bodily lateral shift of the mandible during lateral excursion.\n\n", options: { color: "444444", fontSize: 12.5 } },
    { text: "Components:\n", options: { bold: true, color: TEAL, fontSize: 13 } },
    { text: "• Immediate Side Shift (ISS): 0-3mm initial lateral translation of entire mandible at onset of excursion\n", options: { color: "444444", fontSize: 12 } },
    { text: "• Progressive Side Shift: gradual lateral displacement continuing throughout excursion\n\n", options: { color: "444444", fontSize: 12 } },
    { text: "Working Side Condyle:\n", options: { bold: true, color: TEAL, fontSize: 13 } },
    { text: "Rotates and moves laterally outward (Bennett movement). Stays relatively close to the original position.\n\n", options: { color: "444444", fontSize: 12 } },
    { text: "Non-Working (Orbiting) Condyle:\n", options: { bold: true, color: TEAL, fontSize: 13 } },
    { text: "Translates anteriorly, inferiorly, and medially along the articular eminence. Guided by the condylar inclination (SCI ~33°).\n\n", options: { color: "444444", fontSize: 12 } },
    { text: "Bennett Angle: ~15° (range 0-30°)\nMaximum lateral excursion: 10-12mm", options: { color: NAVY, fontSize: 12, bold: true } }
  ], { x: 0.65, y: 1.3, w: 5.1, h: 5.7, valign: "top", margin: 6 });

  // Right: four colored info cards
  const cards = [
    { title: "Frontal Envelope Shape", color: TEAL, body: "Diamond/rhombus shape when viewed frontally. CO at top, maximum opening at bottom, lateral excursions at sides. Each lateral excursion is ~10-12mm." },
    { title: "Lateral Border Determinants", color: GOLD, body: "Working side: ligaments of TMJ limit lateral movement. Non-working side: slope of articular eminence and medial wall of condylar fossa guide orbiting condyle." },
    { title: "Functional vs Border", color: ORANGE, body: "Chewing strokes use only 1-3mm of lateral excursion. The full 10-12mm border is the physiological limit — rarely accessed in normal function." },
    { title: "Articulator Programming", color: "7B5EA7", body: "Bennett angle set on Hanau H2 via lateral interocclusal records. Controls non-working condyle path. Affects cusp-fossa contacts in lateral excursions." },
  ];
  cards.forEach((c, i) => {
    const row = Math.floor(i / 2);
    const col = i % 2;
    const x = 6.45 + col * 3.35;
    const y = 1.2 + row * 3.0;
    s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
      x, y, w: 3.1, h: 2.7,
      fill: { color: WHITE }, line: { color: c.color, pt: 2 }, rectRadius: 0.1
    });
    s.addShape(pres.shapes.RECTANGLE, {
      x, y, w: 3.1, h: 0.4,
      fill: { color: c.color }, line: { color: c.color }
    });
    s.addText(c.title, {
      x: x + 0.1, y: y + 0.02, w: 2.9, h: 0.36,
      fontSize: 11.5, bold: true, color: WHITE, margin: 0, align: "left", valign: "middle"
    });
    s.addText(c.body, {
      x: x + 0.12, y: y + 0.45, w: 2.86, h: 2.15,
      fontSize: 11.5, color: "333333", valign: "top", margin: 4
    });
  });
}

// ══════════════════════════════════════════════════════════════════════════
// SLIDE 8 — Clinical Implications Overview
// ══════════════════════════════════════════════════════════════════════════
{
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    x: 0, y: 0, w: 13.3, h: 7.5,
    fill: { color: LGRAY }, line: { color: LGRAY }
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  lightHeading(s, "Clinical Implications — Overview", "Six domains where the envelope governs treatment decisions");

  if (imgClinical && !imgClinical.error) {
    s.addImage({ data: imgClinical.base64, x: 0.3, y: 1.05, w: 12.7, h: 6.2 });
  } else {
    s.addText("Clinical implications diagram unavailable", { x: 1, y: 3, w: 11, h: 1, fontSize: 16, color: "999999", align: "center" });
  }
}

// ══════════════════════════════════════════════════════════════════════════
// SLIDE 9 — Complete Dentures
// ══════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  darkBg(s);
  topBar(s, TEAL);

  chip(s, "Clinical Application", 0.6, 0.2, TEAL);

  s.addText("Complete Dentures & the Envelope", {
    x: 0.6, y: 0.65, w: 12, h: 0.65,
    fontSize: 28, bold: true, color: WHITE, fontFace: "Calibri", margin: 0
  });

  const points = [
    { icon: "01", head: "CR as the Only Reference", body: "With no natural teeth, CO cannot be registered. Centric relation — the superior border of the posterior envelope — is the ONLY reproducible position available. All denture occlusion is built around CR." },
    { icon: "02", head: "Bilateral Balanced Occlusion", body: "Dentures must contact on both sides in all excursions (protrusive + lateral) to prevent tipping. Guided by Hanau's Quint: condylar guidance, incisal guidance, occlusal plane, compensating curve, and cusp height." },
    { icon: "03", head: "Protrusive Registration", body: "Patient protrudes 5-6mm within the anterior border of the envelope. The resulting wax record programs the condylar inclination (SCI) on the articulator — average ~33°." },
    { icon: "04", head: "Lateral Registration", body: "Patient moves jaw laterally to record the Bennett angle. Programs the non-working (orbiting) condyle path on the articulator (~15° average)." },
    { icon: "05", head: "Freedom in Centric", body: "A 1mm antero-posterior range of tooth contact (\"long centric\") is built into dentures. This accommodates the natural CR-CO slide and reduces stress on residual ridges." },
    { icon: "06", head: "Occlusal Plane Orientation", body: "The occlusal plane (part of the superior envelope border) must be set parallel to the ala-tragus line. Incorrect positioning shifts the entire occlusal relationship outside functional norms." },
  ];

  points.forEach((p, i) => {
    const col = i % 2;
    const row = Math.floor(i / 2);
    const x = 0.4 + col * 6.5;
    const y = 1.5 + row * 1.85;
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      x, y, w: 6.1, h: 1.7,
      fill: { color: "0F2555" }, line: { color: "1A3A6E" }, rectRadius: 0.1
    });
    s.addShape(pres.shapes.OVAL, {
      x: x + 0.15, y: y + 0.35, w: 0.55, h: 0.55,
      fill: { color: TEAL }, line: { color: TEAL }
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    s.addText(p.icon, {
      x: x + 0.15, y: y + 0.35, w: 0.55, h: 0.55,
      fontSize: 10, bold: true, color: WHITE, align: "center", valign: "middle", margin: 0
    });
    s.addText(p.head, {
      x: x + 0.82, y: y + 0.08, w: 5.1, h: 0.38,
      fontSize: 13, bold: true, color: GOLD, fontFace: "Calibri", margin: 0, valign: "middle"
    });
    s.addText(p.body, {
      x: x + 0.82, y: y + 0.48, w: 5.1, h: 1.1,
      fontSize: 11.5, color: "B0C8E0", fontFace: "Calibri", valign: "top", margin: 2
    });
  });
}

// ══════════════════════════════════════════════════════════════════════════
// SLIDE 10 — TMD Diagnosis Using the Envelope
// ══════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  s.addShape(pres.shapes.RECTANGLE, {
    x: 0, y: 0, w: 13.3, h: 7.5,
    fill: { color: LGRAY }, line: { color: LGRAY }
  });
  lightHeading(s, "TMD Diagnosis — Envelope as a Diagnostic Tool", "How alterations in the envelope reveal pathology");

  const findings = [
    { sign: "Reduced Maximum Opening (<35mm)", dx: "Capsular fibrosis, disc displacement without reduction, muscle splinting (trismus), ankylosis", color: ORANGE },
    { sign: "Deviation on Opening", dx: "Unilateral disc displacement with reduction — the mandible deviates TOWARD the affected side, then corrects (S-curve deviation)", color: TEAL },
    { sign: "Deflection on Opening", dx: "Unilateral restriction without correction — mandible deflects toward affected side throughout opening. Indicates muscle restriction or bony limitation.", color: GOLD },
    { sign: "Reduced Lateral Excursion", dx: "Contralateral lateral pterygoid dysfunction or bony/disc pathology limits orbiting condyle translation. <7mm on one side is significant.", color: "7B5EA7" },
    { sign: "Reduced Protrusion (<6mm)", dx: "Bilateral disc displacement, retrodiscal inflammation, or muscle hypertonicity limiting bilateral condylar translation.", color: ORANGE },
    { sign: "CR-CO Discrepancy >2mm", dx: "May indicate masticatory muscle dysfunction, condylar resorption, or occlusal prematurities driving the mandible away from true CR.", color: TEAL },
  ];

  findings.forEach((f, i) => {
    const col = i % 2;
    const row = Math.floor(i / 2);
    const x = 0.4 + col * 6.5;
    const y = 1.22 + row * 1.98;
    s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
      x, y, w: 6.1, h: 1.82,
      fill: { color: WHITE }, line: { color: f.color, pt: 1.5 }, rectRadius: 0.1,
      shadow: { type: "outer", color: "000000", blur: 5, offset: 2, angle: 135, opacity: 0.07 }
    });
    s.addShape(pres.shapes.RECTANGLE, {
      x, y, w: 6.1, h: 0.38,
      fill: { color: f.color }, line: { color: f.color }
    });
    s.addText(f.sign, {
      x: x + 0.12, y: y + 0.01, w: 5.86, h: 0.36,
      fontSize: 12.5, bold: true, color: WHITE, margin: 0, valign: "middle"
    });
    s.addText([
      { text: "Suggests: ", options: { bold: true, color: NAVY, fontSize: 12 } },
      { text: f.dx, options: { color: "333333", fontSize: 12 } }
    ], { x: x + 0.15, y: y + 0.43, w: 5.8, h: 1.32, valign: "top", margin: 3 });
  });
}

// ══════════════════════════════════════════════════════════════════════════
// SLIDE 11 — Fixed Prosthodontics & Implants
// ══════════════════════════════════════════════════════════════════════════
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  const s = pres.addSlide();
  darkBg(s);
  topBar(s, ORANGE);

  s.addText("Fixed Prosthodontics & Implant Considerations", {
    x: 0.6, y: 0.15, w: 12, h: 0.65,
    fontSize: 26, bold: true, color: WHITE, fontFace: "Calibri", margin: 0
  });
  s.addText("The envelope governs every restoration placed in the mouth", {
    x: 0.6, y: 0.78, w: 12, h: 0.28,
    fontSize: 13, color: GOLD, italic: true, margin: 0
  });

  // Fixed prosthodontics left
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x: 0.4, y: 1.15, w: 6.1, h: 6.05,
    fill: { color: "0F2555" }, line: { color: ORANGE, pt: 2 }, rectRadius: 0.12
  });
  s.addShape(pres.shapes.RECTANGLE, {
    x: 0.4, y: 1.15, w: 6.1, h: 0.45,
    fill: { color: ORANGE }, line: { color: ORANGE }
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  s.addText("Fixed Prosthodontics", {
    x: 0.55, y: 1.17, w: 5.8, h: 0.4,
    fontSize: 14, bold: true, color: WHITE, margin: 0, valign: "middle"
  });

  const fpPoints = [
    { h: "Identify CR-CO Before Treatment", b: "Map the discrepancy first. Restorations built to MIP without checking CR may trap the condyle in a displaced position." },
    { h: "Freedom in Centric", b: "Build 1mm of anteroposterior latitude into posterior tooth contacts. Prevents posterior interference during functional CR-to-CO slide." },
    { h: "Anterior Guidance Must Match", b: "Incisal guidance angle (part of the envelope's superior border) must be reproduced accurately or steeper/shallower restorations will alter posterior disocclusion." },
    { h: "Protrusive Envelope Clearance", b: "Crown heights must not exceed the protrusive border of the envelope. Overcontoured lingual surfaces will create premature protrusive contacts." },
    { h: "Group Function vs Canine Protection", b: "Both occlusal schemes must keep all excursive contacts within the lateral border. Lateral interferences outside the functional zone cause fremitus and tooth mobility." },
  ];
  fpPoints.forEach((pt, i) => {
    s.addText([
      { text: pt.h + "\n", options: { bold: true, color: GOLD, fontSize: 12.5, breakLine: true } },
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    ], { x: 0.6, y: 1.68 + i * 1.02, w: 5.7, h: 0.95, valign: "top", margin: 3 });
    if (i < fpPoints.length - 1) {
      s.addShape(pres.shapes.LINE, {
        x: 0.6, y: 1.68 + (i + 1) * 1.02 - 0.04, w: 5.7, h: 0,
        line: { color: "1A3A6E", pt: 0.75 }
      });
    }
  });

  // Implants right
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x: 6.8, y: 1.15, w: 6.1, h: 6.05,
    fill: { color: "0F2555" }, line: { color: TEAL, pt: 2 }, rectRadius: 0.12
  });
  s.addShape(pres.shapes.RECTANGLE, {
    x: 6.8, y: 1.15, w: 6.1, h: 0.45,
    fill: { color: TEAL }, line: { color: TEAL }
  });
  s.addText("Implant-Supported Prosthetics", {
    x: 6.95, y: 1.17, w: 5.8, h: 0.4,
    fontSize: 14, bold: true, color: WHITE, margin: 0, valign: "middle"
  });

  const impPoints = [
    { h: "No Periodontal Ligament = No Proprioception", b: "Implants lack PDL mechanoreceptors. The neuromuscular envelope modifiers are absent — functional movements may exceed predicted limits, causing overload." },
    { h: "Wider Centric Stop Required", b: "Broader flat occlusal contacts (\"wide centric\") compensate for lack of proprioceptive feedback. Helps distribute forces within the envelope boundary." },
    { h: "Shallow Cusp Angles (0-10°)", b: "Reduce lateral force vectors during excursive movements that may exceed the implant fixture's tolerance. Keeps forces within the functional zone." },
    { h: "Avoid Cantilevers in Lateral Envelope", b: "Cantilever extensions are particularly vulnerable to off-axis forces generated at the lateral borders. Strict occlusal control is mandatory." },
    { h: "Implant Parafunction & Envelope", b: "Bruxism extends movements to the full envelope borders — not just the functional zone. Night guards are critical to protect implant components from border-movement overload." },
  ];
  impPoints.forEach((pt, i) => {
    s.addText([
      { text: pt.h + "\n", options: { bold: true, color: GOLD, fontSize: 12.5, breakLine: true } },
      { text: pt.b, options: { color: "B0C8E0", fontSize: 11.5 } }
    ], { x: 7.0, y: 1.68 + i * 1.02, w: 5.7, h: 0.95, valign: "top", margin: 3 });
    if (i < impPoints.length - 1) {
      s.addShape(pres.shapes.LINE, {
        x: 7.0, y: 1.68 + (i + 1) * 1.02 - 0.04, w: 5.7, h: 0,
        line: { color: "1A3A6E", pt: 0.75 }
      });
    }
  });
}

// ══════════════════════════════════════════════════════════════════════════
// SLIDE 12 — Orthodontics & Envelope Changes
// ══════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  s.addShape(pres.shapes.RECTANGLE, {
    x: 0, y: 0, w: 13.3, h: 7.5,
    fill: { color: LGRAY }, line: { color: LGRAY }
  });
  lightHeading(s, "Orthodontics — How Treatment Changes the Envelope", "Tooth movement reshapes the superior border of the envelope");

  const rows = [
    ["Condition / Treatment", "Effect on Envelope", "Clinical Action"],
    ["Deep overbite correction", "Increases vertical dimension → expands inferior border of sagittal envelope", "Re-record CR after leveling and aligning"],
    ["Extraction treatment", "May alter incisal guidance angle (anterior envelope border) if incisors are retracted", "Monitor overjet/overbite changes during retraction"],
    ["Class II correction (mandibular advancement)", "Repositions CO relative to envelope — condyle may be displaced anteriorly", "Verify CR position with records before finalizing occlusion"],
    ["Class III treatment / orthognathic surgery", "Surgically repositions the mandible — entire envelope shifts spatially", "New facebow transfer and articulator mounting post-surgery"],
    ["Retention phase", "Teeth settle into new positions — CO stabilizes within the envelope", "Check for CR-CO discrepancy at debond and 6-month review"],
    ["Bruxism during orthodontics", "Forces reach envelope borders during sleep — increases risk of root resorption", "Night guard use; monitor root lengths on radiographs"],
  ];

  // Table
  const colWidths = [3.0, 4.6, 4.6];
  const startX = 0.4;
  const startY = 1.18;
  const rowH = 0.82;

  rows.forEach((row, ri) => {
    row.forEach((cell, ci) => {
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      const cy = startY + ri * rowH;
      const isHeader = ri === 0;
      s.addShape(pres.shapes.RECTANGLE, {
        x: cx, y: cy, w: colWidths[ci], h: rowH,
        fill: { color: isHeader ? NAVY : (ri % 2 === 0 ? WHITE : "EEF4FB") },
        line: { color: "D0DCE8", pt: 0.75 }
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      s.addText(cell, {
        x: cx + 0.08, y: cy + 0.04, w: colWidths[ci] - 0.16, h: rowH - 0.08,
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        bold: isHeader,
        color: isHeader ? WHITE : (ci === 0 ? NAVY : "333333"),
        fontFace: "Calibri",
        valign: "middle",
        margin: 3
      });
    });
  });
}

// ══════════════════════════════════════════════════════════════════════════
// SLIDE 13 — Summary & Key Takeaways
// ══════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  darkBg(s);
  topBar(s, GOLD);

  // Left accent bar
  s.addShape(pres.shapes.RECTANGLE, {
    x: 0, y: 0.08, w: 0.06, h: 7.42,
    fill: { color: GOLD }, line: { color: GOLD }
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  s.addText("Summary & Key Takeaways", {
    x: 0.6, y: 0.15, w: 9, h: 0.65,
    fontSize: 28, bold: true, color: WHITE, fontFace: "Calibri", margin: 0
  });

  chip(s, "Posselt's Envelope", 0.6, 0.88, TEAL);

  const takeaways = [
    { num: "1", text: "The envelope defines the MAXIMUM 3D space available for jaw movement — all restorations, prostheses, and orthodontic outcomes must respect its borders." },
    { num: "2", text: "Centric Relation (CR) is the key reference on the posterior-superior border — reproducible, ligament-determined, and the foundation of full occlusal rehabilitation." },
    { num: "3", text: "The CR-CO discrepancy (0-1mm) is physiologically normal. Discrepancies >1mm require evaluation and may signal TMD or occlusal disease." },
    { num: "4", text: "The functional chewing zone occupies only a small fraction of the total envelope — meaning patients are most comfortable when restorations keep them in this zone." },
    { num: "5", text: "Alterations in envelope shape (reduced opening, deviation, restricted lateral excursion) are diagnostic signs of TMJ, muscle, or occlusal pathology." },
    { num: "6", text: "The Hanau H2 articulator mechanically reproduces the superior border and condylar paths of the envelope through five interrelated adjustable parameters (Hanau's Quint)." },
  ];

  takeaways.forEach((t, i) => {
    const col = i % 2;
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    s.addText(t.text, {
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}

// ══════════════════════════════════════════════════════════════════════════
// SLIDE 14 — Thank You / References
// ══════════════════════════════════════════════════════════════════════════
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  darkBg(s);
  topBar(s, TEAL);

  s.addShape(pres.shapes.OVAL, {
    x: 8.5, y: 1.0, w: 5.5, h: 5.5,
    fill: { color: "0F2555", transparency: 20 }, line: { color: "0F2555", transparency: 20 }
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  s.addText("Thank You", {
    x: 0.8, y: 1.4, w: 8, h: 1.1,
    fontSize: 52, bold: true, color: WHITE, fontFace: "Calibri", margin: 0
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  s.addText("Posselt's Envelope of Motion\nand Clinical Implications in Prosthodontics", {
    x: 0.8, y: 2.55, w: 8, h: 0.9,
    fontSize: 16, color: GOLD, italic: true, fontFace: "Calibri", margin: 0
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  s.addShape(pres.shapes.LINE, {
    x: 0.8, y: 3.6, w: 5, h: 0,
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  s.addText("Key References", {
    x: 0.8, y: 3.8, w: 8, h: 0.4,
    fontSize: 15, bold: true, color: TEAL, margin: 0
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  const refs = [
    "Posselt U. (1952). Studies in the mobility of the human mandible. Acta Odontologica Scandinavica.",
    "Bennett NG. (1906). A contribution to the study of the movements of the mandible. Proc R Soc Med.",
    "Hanau RL. (1926). Articulation defined, analyzed and formulated. J Am Dent Assoc.",
    "Okeson JP. (2019). Management of Temporomandibular Disorders and Occlusion. 8th ed. Elsevier.",
    "Zarb GA, Bolender CL. (2004). Prosthodontic Treatment for Edentulous Patients. 12th ed. Mosby.",
    "Ash MM, Ramfjord SP. (1995). Occlusion. 4th ed. Saunders.",
  ];
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    s.addText([
      { text: "• ", options: { color: GOLD, bold: true } },
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}

// ══════════════════════════════════════════════════════════════════════════
// WRITE OUTPUT
// ══════════════════════════════════════════════════════════════════════════
const outPath = "/home/daytona/workspace/posselt-presentation/Posselts_Envelope_of_Motion.pptx";
pres.writeFile({ fileName: outPath })
  .then(() => console.log("DONE:", outPath))
  .catch(e => { console.error("ERROR:", e); process.exit(1); });

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