The core of intraoral scanning is capturing a precise, complete, and interference-free digital impression. Responsibility on the clinical side centers on the quality of the original data. The following situations are typically attributed to the scanning side:
01. Obvious defects in the scan data
Missing critical areas: Incomplete capture of interproximal contacts, subgingival margins, or occlusal anatomy makes it impossible for the technician to determine margins or occlusion.
Insufficient accuracy: Patient movement, unstable head position, or overly fast scanner movement produces jagged edges, overlapping artifacts, or dimensional errors.
Interference factors not eliminated: Residual saliva, blood, or improper soft-tissue retraction creates noise or artifacts that distort the true tooth morphology.
02. Inadequate preparation before scanning
Tooth preparation that does not meet restorative requirements (unclear margins, insufficient shoulder width). Even a complete scan cannot produce a well-fitting restoration.
Missing key clinical information: Desired occlusal height, contact tightness, or gingival margin position leaves the technician without necessary guidance.
03. Procedural errors during scanning
Incorrect bite registration: Missing or inaccurate occlusion records, residual interferences, or misalignment of upper and lower arches.
In implant cases: Failure to accurately capture abutment orientation, angulation, or spatial relationships with natural teeth.
2. Responsibility in the Design Stage (Laboratory Side)
Technicians are responsible for creating designs that follow restorative principles based on qualified scan data and clinical requirements. The following situations usually fall under design-side responsibility:
01. Designs that violate restorative principles
Occlusal errors: High spots causing premature contact, insufficient contact, or improper interproximal contact points leading to food impaction.
Margin design problems: Overextended margins that impinge on gingiva, short margins that fail to cover the preparation, or poorly adapted margins creating excessive gaps.
Morphological issues: Excessive or insufficient axial contours affecting food shedding and periodontal health, or incorrect bracket positioning in orthodontic cases.
02. Failure to verify scan data reasonableness
Minor flaws (noise, slightly blurred margins) are ignored instead of requesting a rescan; the technician proceeds with forced design.
Obvious problems such as inadequate preparation space are not questioned, and the design is completed on flawed data.
03. Operational mistakes in the design process
Overuse of "smooth" or "fill" functions that destroy natural anatomy, or incorrect redrawing of margin lines.
Ignoring specific clinical instructions (e.g., "establish good occlusion with the opposing tooth" or "slightly lighter interproximal contacts").
3. Shared Responsibility or No-Fault Situations
Equipment calibration failure causing systemic accuracy deviation that neither side can control through technique.
Unexpected material shrinkage during manufacturing despite correct scan and design.
"Borderline" data: Scan is usable but imperfect; technician designs without feedback while clinician assumes "it should be good enough."
Ambiguous communication: Design request states "natural and harmonious morphology" without reference photos or clear parameters.
Unspoken assumptions: Clinician assumes the technician will automatically adjust occlusion; technician assumes the scanned bite is final.
4. Practical Measures to Reduce IOS Remakes
01. Analyze the root cause every time Compare original scan files with design files systematically. First verify whether the scan meets the standards of completeness, accuracy, and freedom from interference, then evaluate whether the design follows clinical requirements and restorative principles. Treat each remake as a process-improvement opportunity.
02. Build deeper collaboration
Clinicians should receive standardized digital scanning training and understand laboratory design logic.
Technicians should periodically observe clinical procedures to better grasp real-world constraints.
Hold regular case discussion meetings to share solutions for common restorative challenges and accumulate shared experience.
03. Benchmark against industry standards Compare remake causes against digital restorative guidelines and established clinical protocols. Continuous comparison and refinement reduce remake frequency and raise overall efficiency.
Successful digital restorations require excellent clinical technique, high-quality digital data acquisition, and efficient clinician–technician communication. Defining responsibility is not about assigning blame - it is about clarifying standards, improving collaboration, and delivering the best possible outcomes for patients.
High-quality scan data is the foundation of fewer remakes. Aident Technology's AI-30 Intraoral Scanner delivers true 10 μm accuracy, powder-free true-color scanning, ultra-lightweight ergonomics (156 g), anti-fog heating, and full open-system compatibility. Reliable data from the start helps both clinicians and technicians reduce remakes and focus on excellence.
Explore our Intraoral Scanners and complete Digital Dentistry Solutions.
Request a quote today and experience scanners engineered for clinical precision and workflow reliability.
