Stop guessing. Start designing force systems.
The complete technical reference for TPA, lingual arches, rectangular loops, and root correction springs — 200 pages, 250 diagrams, 40 videos. One-time payment, lifetime access.
The real problem
Most orthodontic complications are not caused by lack of force. They are caused by poorly understood force systems.
When movements become complex — asymmetries, edentulous spaces, loss of anchorage, root control — intuition is no longer enough. Straight-wire logic reaches its limits.
What remains is biomechanics. Not as formulas, but as a clinical language.
What students achieve after learning the segmented techniques
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Transpalatal Arch (TPA)
Expansion/contraction · Molar derotation · Mesialization/distalization · torque control
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Lingual Arches
Uprighting · Protraction · Derotations · asymmetric mechanics
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Rectangular Loops
Precise derotations · Controlled tipping · Segmented intrusion
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Root Springs
Molar uprighting · Modified springs for hybrid mechanics (braces + aligners)
Who this is for
This reference is ideal for orthodontists who:
• Want more control over complex tooth movements
• Feel limited by straight-wire logic alone
• Work with adult patients and challenging mechanics
• Want to understand why appliances work, not just how
The scope
This work integrates the biomechanics of four fundamental segmented appliances:
✓ Transpalatal bars
✓ Lingual arches
✓ Rectangular loops
✓ Root correction springs
Each appliance is analyzed through:
• Equilibrium principles
• Preactivation diagrams
• Trial activation logic
• Force system application
What's Included in the Integrated Learning Edition
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1INTRODUCTION — How to Use This Book
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2PART 1 — ESSENTIAL CONCEPTS
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3PART 2.1 — TPA PREACTIVATIONS
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4PART 2.2 - LINGUAL ARCH PREACTIVATIONS
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5PART 2.3 - RECTANGULAR LOOPS PREACTIVATIONS
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6PART 2.4 - ROOT SPRINGS PREACTIVATIONS
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7BONUS
Why segmented mechanics still matter
Despite advances in materials, digital workflows, and aligner systems, complex cases still demand precise force control.
Segmented appliances are not outdated. They are fundamental.
Their value lies precisely in what modern systems often lack: specificity, predictability, and biomechanical transparency.
This book does not replace your current technique. It adds to your clinical repertoire.
Gustavo H. Gameiro, DDS, MSc, PhD
Orthodontist, professor, and researcher specializing in orthodontic biomechanics and segmented arch mechanics.
Professor Gameiro has dedicated his academic and clinical career to making force-system analysis accessible to practicing orthodontists.
His teaching approach prioritizes conceptual clarity over mechanical complexity—demonstrating that precise control comes from applying knowledge, not from memorizing formulas.
This work represents decades of clinical refinement, teaching experience, and a commitment to presenting biomechanics as it actually functions, not as it's often simplified.