Remakes are more than an inconvenience — they cost chair time, frustrate patients, and strain the dentist–lab relationship. The good news is that most remakes stem from a handful of predictable issues, and with a few consistent habits in the operatory, you can prevent the majority of them.

Below is a detailed, actionable guide you can use chairside to reduce remakes for crowns, veneers, and bridges — and to help your lab deliver the best possible results on the first try.

1. Prep Design: The Foundation

Crowns

  • Avoid Undercuts: Use magnification to verify a smooth, continuous draw. Even a small undercut can distort digital scans or cause die-lock in traditional impressions.
  • Ideal Reduction:
  • Posterior: 1.5–2.0 mm occlusal reduction.
  • Anterior: 1.0–1.5 mm incisal reduction.
  • Axial Walls: 1.0–1.2 mm.
  • Finish Lines: A heavy chamfer or rounded shoulder is the most predictable for modern ceramics. Avoid feather-edge margins—they’re difficult to read and prone to chipping.

Veneers

  • Uniform Reduction: Use depth‑cutting burs to ensure a consistent 0.5–0.7 mm reduction.
  • Clear Margins: A butt-joint incisal margin or light chamfer provides a clean boundary.
  • Enamel Preservation: Avoid over-tapering; maximizing enamel bonding surface is key to longevity.

Bridges

  • Parallelism: Ensure abutments have compatible paths of insertion.
  • Ferrule: Aim for at least 2 mm of ferrule height for long-term stability.

2. Soft Tissue Management


Clear margins equal fewer remakes.

  • The Double-Cord Technique: Use a #00 or #0 cord first, followed by a #1 or #2. Remove the top cord immediately before scanning or impressioning.
  • Hemostasis: Aluminum chloride gels (25%) control bleeding without distorting tissue.
  • The "Ooze" Rule: Never take an impression while tissue is still oozing. Even slight moisture can distort a margin.

3. Impressions & Scans


Digital Scanning

  • Dry Field is Everything: Saliva pooling around margins is the #1 cause of unreadable scans.
  • Scan Strategy: Follow a consistent path—occlusal → lingual → buccal—to avoid stitching errors.
  • Check the Preview: Zoom in on margins before dismissing the patient. If you can’t see it clearly, the lab can’t either.

Traditional Impressions

  • Tray Rigidity: Use a rigid tray; stock trays flex, and flexion creates distortion.
  • Inspection: Look for voids, bubbles, or tears at the margin before sending the case.

4. Bite Records: Small Step, Huge Impact


Inaccurate occlusion is a primary remake trigger.

  • Material: Use a rigid bite material; soft materials compress and distort.
  • Trimming: Capture only the occlusal surfaces. Bulky bites prevent the case from seating fully on the model.
  • Full-Arch Bites: Always provide a full-arch bite for multiple units, bridges, or patients with unstable occlusion.

5. Shade Communication


  • Lighting: Use natural or color-corrected lighting to reduce metamerism.
  • Photography: Include a shade tab in the same plane as the tooth.
  • The Details: Note surface texture (glossy vs. matte), translucency zones, and characterizations like white spots or halos.

6. Communication: The Key Variable

Include these details with every case to ensure we are aligned with your vision:

  • Material preference (Zirconia, Lithium Disilicate, etc.)
  • Desired occlusal scheme
  • Specific "Stump Shade" for all-ceramic cases


Final Thoughts:



Remakes aren't inevitable. With consistent prep design, clear margins, and strong communication, we can improve patient satisfaction and clinical efficiency together.

Disclaimer: The information provided in this article is for educational purposes only and is not intended to replace independent clinical judgment. Clinicians should evaluate each case individually and follow manufacturer instructions, current evidence-based guidelines, and their own professional expertise. Chase Dental Lab assumes no responsibility for patient outcomes resulting from the application of the information presented here.