Document Version Information

Dental Restorative STL Model Inspection Standard Operation Manual

Document Version Information

• Document Version: 1.0
• Release Date: 2025-04-16
• Reviewer:
• Implementation Date:

Table of Contents

1. Introduction
2. Basic File Information Inspection
3. Geometric Structure Inspection
4. Dental Professional Standards Inspection
5. Technical Parameters Inspection
6. Special Situations Inspection
7. Model Repair Assessment
8. Comprehensive Assessment and Processing Decision
9. Inspection Flowchart
10. Appendix: Inspection Table

1. Introduction

This operation manual details the inspection standards, assessment methods, and decision-making processes for dental restorative STL models, aiming to ensure that all received oral scan STL files meet the requirements for high-quality dental restorations. As a bridge connecting global dentists with mainland China’s dental prosthetic manufacturers, Austin Eco Connect needs to strictly control the quality of each model file to ensure the accuracy and functionality of the final prosthesis.

This manual applies to all technical personnel responsible for STL model initial inspection, quality control, and repair, providing unified inspection standards and scoring systems to ensure the consistency and repeatability of the inspection process.

2. Basic File Information Inspection

2.1 File Format

Inspection Description:
Check whether the STL file format is standard and can be normally opened and read by design software. STL format is preferred, while OBJ and AMF formats are also accepted.

Inspection Method:

1. Attempt to open the file using CAD software (such as 3Shape, ExoCAD, etc.)
2. Check for error messages during the opening process
3. Confirm that the file content is displayed completely

Rating Standards:

• 5 points: Standard STL format file, no errors, can be read by all mainstream software
• 4 points: Standard STL format, minor warnings but does not affect use
• 3 points: Other supported formats (OBJ/AMF), needs conversion to STL for use
• 2 points: File has minor errors, requires repair when opening
• 1 point: Serious errors or unsupported format, cannot be opened normally

Processing Method:

• 5-4 points: Pass, direct use
• 3 points: Use after conversion
• 1-2 points: Return for resubmission

2.2 File Size

Inspection Description:
Check if the STL file size is appropriate. Files that are too large will cause slow software processing, while files that are too small may indicate insufficient model precision.

Inspection Method:

1. Check the size information in the file properties
2. Compare with industry standard ranges

Rating Standards:

• 5 points: 5-30MB, ideal size range
• 4 points: 30-40MB or 3-5MB, acceptable range
• 3 points: 40-50MB or 2-3MB, needs optimization
• 2 points: 50-100MB or 1-2MB, obviously unreasonable
• 1 point: >100MB or <1MB, extreme range

Processing Method:

• 5-4 points: Pass, direct use
• 3 points: Use after optimization
• 1-2 points: Return for rescan, noting appropriate scan settings

2.3 File Naming

Inspection Description:
Check if the file naming includes necessary information and complies with standards, including patient ID, tooth position information, and date.

Inspection Method:

1. Check if the filename includes patient ID (or number)
2. Check if it includes tooth position information
3. Check if it includes date or version information

Rating Standards:

• 5 points: Fully complies with naming conventions, complete information
• 4 points: Major information complete, format slightly non-standard
• 3 points: Basic information complete but non-standard or missing minor information
• 2 points: Missing important information, difficult to identify
• 1 point: Chaotic naming, unable to identify corresponding information

Processing Method:

• 5-3 points: Pass (may need renaming)
• 1-2 points: Request additional information and renaming from provider

2.4 Scan Source

Inspection Description:
Confirm the scan source of the STL file (intraoral scan/model scan/impression scan), as different sources have different characteristics and requirements.

Inspection Method:

1. Check scan source information in filename or metadata
2. Review descriptions in accompanying documents
3. Infer scan source from model characteristics

Rating Standards:

• 5 points: Clearly marked scan source and consistent with actual
• 4 points: Source can be inferred from documentation or filename
• 3 points: Not explicitly marked but can be clearly determined from model features
• 2 points: Source unclear, requires estimation
• 1 point: Unable to determine source or source information inconsistent with actual

Processing Method:

• 5-3 points: Pass
• 1-2 points: Confirm scan source with provider

3. Geometric Structure Inspection

3.1 Mesh Density

Inspection Description:
Check if the number of triangular faces in the model is sufficient to represent details. Different areas may require different mesh densities, such as preparation margin areas usually requiring higher density.

Inspection Method:

1. Use CAD software to view the total number of faces in the model
2. Check mesh density in key areas (preparation margins, occlusal surfaces)
3. Evaluate whether the mesh distribution is reasonable

Rating Standards:

• 5 points: >5 million faces, reasonable mesh distribution in key areas
• 4 points: 3-5 million faces, denser mesh in key areas
• 3 points: 2-3 million faces, basically reasonable mesh distribution
• 2 points: 1-2 million faces, insufficient mesh in key areas
• 1 point: <1 million faces, obviously rough

Processing Method:

• 5-4 points: Pass
• 3 points: Suitable for some prostheses, not suitable for high-precision requirements
• 1-2 points: Return for rescan, noting higher resolution requirements

3.2 Model Completeness

Inspection Description:
Check if the model has holes, missing parts, or damaged areas. Completeness is a basic requirement for model quality.

Inspection Method:

1. Use software’s “hole detection” function
2. Rotate the model 360 degrees to view all angles
3. Check model boundary completeness
4. Pay special attention to preparation area and adjacent regions

Rating Standards:

• 5 points: 100% complete, no holes or missing parts
• 4 points: ≥98% complete, tiny holes but not in key areas
• 3 points: 95-98% complete, small repairable defects in key areas
• 2 points: 90-95% complete, larger defects or missing key areas
• 1 point: <90% complete, severe missing parts

Processing Method:

• 5-4 points: Pass
• 3 points: Use after repair
• 1-2 points: Return for rescan

3.3 Watertightness

Inspection Description:
Check if the model is a closed watertight body, i.e., a completely closed surface without any leaks. Watertightness is crucial for subsequent CAD design and 3D printing.

Inspection Method:

1. Use the watertightness check function of 3D modeling software
2. Check for open edges
3. Check surface continuity

Rating Standards:

• 5 points: 100% watertight, completely closed continuous surface
• 4 points: Almost watertight, only extremely small leaks that are easy to repair
• 3 points: Few repairable leaks in non-critical areas
• 2 points: Multiple leaks, including in key areas
• 1 point: Severely non-watertight, large areas of open edges

Processing Method:

• 5-4 points: Pass
• 3 points: Use after repair
• 1-2 points: Return for rescan

3.4 Mesh Topology

Inspection Description:
Check the topological correctness of the mesh structure, including non-manifold edges (an edge shared by more than two triangles), inverted faces (incorrect face normal vector direction), and self-intersections (mesh surface intersecting with itself).

Inspection Method:

1. Use professional repair software (such as Materialise Magics, Netfabb) to detect topology errors
2. Record the number and location of non-manifold edges, inverted faces, and self-intersections
3. Evaluate repair difficulty

Rating Standards:

• 5 points: No topology errors
• 4 points: <10 minor topology errors in non-critical areas
• 3 points: 10-30 repairable topology errors
• 2 points: 31-50 topology errors or errors in key areas
• 1 point: >50 topology errors or serious structural problems

Processing Method:

• 5-4 points: Pass
• 3 points: Use after repair
• 1-2 points: Return for rescan

4. Dental Professional Standards Inspection

4.1 Preparation Margin

Inspection Description:
Check the clarity, continuity, and closure of the preparation margin. The margin is the most critical part of the restoration, directly affecting the fit and service life.

Inspection Method:

1. Enlarge the preparation area for 360-degree inspection
2. Track the continuity of the margin line
3. Check margin clarity and definition
4. Record any discontinuities, blurring, or uncertain areas

Rating Standards:

• 5 points: 100% clear and continuous margins, perfect definition
• 4 points: ≥95% clear, extremely slight blurring but does not affect design
• 3 points: 90-95% clear, parts can be repaired
• 2 points: 80-90% clear, multiple discontinuities or blurring
• 1 point: <80% clear, margins difficult to identify

Processing Method:

• 5-4 points: Pass
• 3 points: Suitable for some prostheses, requires special attention during design
• 1-2 points: Return for rescan

4.2 Preparation Axial Walls

Inspection Description:
Check the smoothness, continuity, and morphology of the preparation axial walls to ensure they are suitable for prosthesis fabrication.

Inspection Method:

1. Check the flatness of axial wall surfaces
2. Check for obvious unevenness or steps
3. Evaluate whether the taper angle is appropriate
4. Check if the axial height is sufficient

Rating Standards:

• 5 points: Ideally smooth and even, moderate taper angle
• 4 points: Minor irregularities, but does not affect prosthesis seating
• 3 points: Moderate irregularities, can be compensated through design
• 2 points: Obvious irregularities, difficult to design suitable prosthesis
• 1 point: Severe irregularities, improper preparation design

Processing Method:

• 5-4 points: Pass
• 3 points: Use after repair, noting problem areas
• 1-2 points: Return for rescan, suggest repreparation

4.3 Occlusal Relationship

Inspection Description:
Check the accuracy of the occlusal relationship between upper and lower jaws, whether the distribution of occlusal contact points is reasonable, and if there is any occlusal interference.

Inspection Method:

1. Check the relationship between upper and lower models in maximum intercuspation
2. Use virtual occlusal analysis tools to check contact point distribution
3. Check for premature contacts or occlusal interference
4. Evaluate if occlusal space is sufficient

Rating Standards:

• 5 points: Perfect occlusal relationship, ideal contact point distribution
• 4 points: Minor deviation, can be used directly
• 3 points: Moderate deviation, needs adjustment during design
• 2 points: Obvious deviation, inaccurate occlusal relationship
• 1 point: Severe misalignment, unable to determine correct occlusal relationship

Processing Method:

• 5-4 points: Pass
• 3 points: Use after adjustment, record required adjustments
• 1-2 points: Return for rescan, request correct occlusal records

4.4 Proximal Relationship

Inspection Description:
Check the relationship between the restoration tooth and adjacent teeth, including proximal area morphology, contact point position, and size.

Inspection Method:

1. Check the completeness of the proximal area
2. Evaluate if the contact point position is physiological
3. Check if the proximal area contour is natural
4. Evaluate embrasure morphology

Rating Standards:

• 5 points: Ideal proximal relationship, natural physiological morphology
• 4 points: Minor deviation, does not affect function and aesthetics
• 3 points: Moderate deviation, needs adjustment but basic structure correct
• 2 points: Obvious deviation, unnatural proximal relationship
• 1 point: Severe misalignment, unable to design suitable contact points

Processing Method:

• 5-4 points: Pass
• 3 points: Use after adjustment
• 1-2 points: Return for rescan

4.5 Gingival Interface

Inspection Description:
Check the clarity of the gingival margin line and the depth of gingival sulcus scanning. Appropriate gingival sulcus depth (0.5-1.0mm) is crucial for making prostheses with good margins.

Inspection Method:

1. Check the clarity and continuity of the gingival margin line
2. Measure the gingival sulcus scanning depth
3. Evaluate the completeness of gingival tissue surface details
4. Check if the gingival papilla morphology is natural

Rating Standards:

• 5 points: Ideal sulcus depth and clarity, complete tissue details
• 4 points: Minor deviation in sulcus depth, clear margins
• 3 points: Moderate deviation in sulcus depth (too shallow or slightly deep)
• 2 points: Unclear sulcus, margins difficult to determine
• 1 point: Missing sulcus or too deep, unable to determine margin position

Processing Method:

• 5-4 points: Pass
• 3 points: Usable but margin quality may be reduced
• 1-2 points: Return for rescan, noting correct gingival exposure requirements

5. Technical Parameters Inspection

5.1 Single Tooth Internal Accuracy

Inspection Description:
Evaluate the accuracy of the internal structure of a single crown, which affects the internal fit of the prosthesis.

Inspection Method:

1. Use accuracy analysis software to compare with standard data
2. Check the sharpness of internal angles and lines
3. Evaluate the reproducibility of small structures

Rating Standards:

• 5 points: ≤30μm, ultra-high accuracy
• 4 points: 30-50μm, high accuracy
• 3 points: 50-70μm, standard accuracy
• 2 points: 70-100μm, low accuracy
• 1 point: >100μm, unacceptable

Processing Method:

• 5-4 points: Pass
• 3 points: Margin acceptable but internal adjustment needed, suitable for certain prostheses
• 1-2 points: Return for rescan

5.2 Single Tooth External Accuracy

Inspection Description:
Evaluate the accuracy of the external structure of a single crown, which affects the contact relationship with adjacent teeth and overall shape.

Inspection Method:

1. Measure the accuracy of key external dimensions
2. Evaluate the restoration of surface details
3. Check the smoothness and continuity of external contours

Rating Standards:

• 5 points: ≤20μm, ultra-high accuracy
• 4 points: 20-30μm, high accuracy
• 3 points: 30-50μm, standard accuracy
• 2 points: 50-80μm, low accuracy
• 1 point: >80μm, unacceptable

Processing Method:

• 5-4 points: Pass
• 3 points: Use after adjustment
• 1-2 points: Return for rescan

5.3 Multi-unit Overall Accuracy

Inspection Description:
Evaluate the overall accuracy of multi-unit restorations (such as bridges), including the relative positional relationship between units.

Inspection Method:

1. Measure the distance accuracy between multiple units
2. Check for overall bending or twisting
3. Evaluate the accuracy of connection areas

Rating Standards:

• 5 points: ≤50μm, ultra-high accuracy
• 4 points: 50-80μm, high accuracy
• 3 points: 80-100μm, standard accuracy
• 2 points: 100-150μm, low accuracy
• 1 point: >150μm, unacceptable

Processing Method:

• 5-4 points: Pass
• 3 points: Margin acceptable but overall adjustment needed
• 1-2 points: Return for rescan

5.4 Preparation Margin Resolution

Inspection Description:
Specifically evaluate the resolution of the preparation margin area, which is key to ensuring the marginal fit of the prosthesis.

Inspection Method:

1. Enlarge to check margin details
2. Measure the clarity of the margin line
3. Evaluate the sharpness of margin corners

Rating Standards:

• 5 points: ≤15μm, ultra-high resolution
• 4 points: 15-20μm, high resolution
• 3 points: 20-30μm, standard resolution
• 2 points: 30-50μm, low resolution
• 1 point: >50μm, blurry margins

Processing Method:

• 5-4 points: Pass
• 3 points: Use after adjustment, pay attention to margin processing
• 1-2 points: Return for rescan

5.5 Surface Quality

Inspection Description:
Evaluate the quality of the model surface, including roughness, natural texture, and scanning traces.

Inspection Method:

1. Check surface roughness Ra value
2. Observe if there are obvious scanning stripes or stair-stepping effects
3. Evaluate whether the surface texture is natural
4. Check if the surface glossiness is moderate

Rating Standards:

• 5 points: Ra≤1μm, extremely smooth and natural surface
• 4 points: Ra 1-1.5μm, smooth and natural surface
• 3 points: Ra 1.5-2μm, basically smooth surface
• 2 points: Ra 2-3μm, rough surface or obvious traces
• 1 point: Ra >3μm, poor surface quality

Processing Method:

• 5-4 points: Pass
• 3 points: Use after refinement
• 1-2 points: Return for rescan

6. Special Situations Inspection

6.1 Multi-unit Bridge

Inspection Description:
Special inspection for multi-unit bridges, focusing on the evaluation of bridge connector area morphology and strength.

Inspection Method:

1. Check the thickness and width of the bridge connector area
2. Evaluate the relationship between bridge and abutment teeth
3. Check if the bridge cantilever length is appropriate
4. Evaluate overall coordination and symmetry

Rating Standards:

• 5 points: Ideal connector area, natural morphology, sufficient strength
• 4 points: Minor deviation but sufficient strength, coordinated morphology
• 3 points: Connector area needs reinforcement but basic structure feasible
• 2 points: Obviously insufficient connector area, structural risk exists
• 1 point: Severely insufficient connector area, strength cannot be guaranteed

Processing Method:

• 5-4 points: Pass
• 3 points: Use after adjustment, reinforce connector area
• 1-2 points: Return for redesign

6.2 Implant Prosthesis

Inspection Description:
Special inspection for implant prostheses, focusing on the evaluation of implant connection interface accuracy and channel position.

Inspection Method:

1. Check the accuracy of the implant platform
2. Evaluate the matching degree of the connection interface
3. Check the position and angle of the screw channel
4. Evaluate the naturalness of soft tissue contour

Rating Standards:

• 5 points: Perfect match, precise connection, accurate channel position
• 4 points: Minor deviation but does not affect connection and function
• 3 points: Correctable deviation, basic structure correct
• 2 points: Obvious deviation, may affect stability
• 1 point: Severe mismatch, unable to fabricate suitable prosthesis

Processing Method:

• 5-4 points: Pass
• 3 points: Use after adjustment, note adjustment items
• 1-2 points: Return for rescan

6.3 Full-mouth Restoration

Inspection Description:
Special inspection for full-mouth or large-area restorations, focusing on the evaluation of dental arch curves and occlusal balance.

Inspection Method:

1. Check the naturalness of the curve of Spee and curve of Wilson
2. Evaluate the balance of full-mouth occlusion
3. Check the reasonableness of anterior guidance function
4. Evaluate the continuity and overall coordination of the dental arch

Rating Standards:

• 5 points: Perfect coordination, natural dental arch curves, balanced occlusion
• 4 points: Needs minor adjustment but overall coordinated
• 3 points: Needs moderate adjustment, basic structure reasonable
• 2 points: Needs major adjustment, obvious problems exist
• 1 point: Severe incoordination, abnormal dental arch curves

Processing Method:

• 5-4 points: Pass
• 3 points: Use after adjustment, note adjustment items
• 1-2 points: Return for rescan

7. Model Repair Assessment

7.1 Repair Difficulty

Inspection Description:
Evaluate the difficulty of repairing existing model problems to determine if it’s worth investing time in repair.

Inspection Method:

1. Evaluate problem types and quantity
2. Estimate time required for repair
3. Evaluate expected quality after repair
4. Consider alternative solutions

Rating Standards:

• 5 points: No repair needed, perfect model
• 4 points: Simple repair, can be completed in minutes
• 3 points: Medium difficulty repair, requires 10-30 minutes
• 2 points: Complex repair, requires 30-60 minutes
• 1 point: Almost impossible to repair or requires hours of work

Processing Method:

• 5-4 points: Direct use or simple repair
• 3 points: Time-consuming repair needed, evaluate repair value
• 1-2 points: Return for rescan, repair cost too high

7.2 Repair Effect

Inspection Description:
Evaluate the expected quality of the model after repair to determine if repair can achieve satisfactory results.

Inspection Method:

1. Estimate repair effect based on experience
2. Perform small-scale test repairs
3. Evaluate functional impact after repair

Rating Standards:

• 5 points: Can achieve perfect condition after repair
• 4 points: Good quality after repair, no functional impact
• 3 points: Usable but with limitations after repair
• 2 points: Still obvious defects after repair
• 1 point: Repair cannot achieve usable standard

Processing Method:

• 5-4 points: Proceed with repair then use
• 3 points: Limited use after repair, note limitations
• 1-2 points: Return for rescan

8. Comprehensive Assessment and Processing Decision

8.1 Comprehensive Score Calculation

Comprehensive score is calculated based on the following formula:

Total Score = (Essential Items Average Score × 60%) + (Other Items Average Score × 40%)

Essential items (higher weight) include:

1. Preparation margin clarity
2. Model completeness
3. Occlusal relationship accuracy
4. Watertightness
5. File format compatibility

Total score is 100 points, conversion calculation:

Final Score = (Total Evaluation Average / 5) × 100

8.2 Processing Decision Standards

Assessment Type	Score Range	Processing Decision	Description
Pass	Total score ≥80 points and all essential items ≥4 points	Direct use	Excellent model quality, can be used directly for prosthesis fabrication
Use after repair	Total score 60-79 points or individual essential items 3 points	Use after repair	Model has repairable issues, usable after repair
Limited use	Total score 50-59 points	Use in specific situations	Only suitable for specific types of prostheses or temporary use
Return for rescan	Total score <50 points or any essential item ≤2 points	Return for rescan	Insufficient model quality, unrepairable or repair cost too high

8.3 Decision Process

1. Calculate total score
2. Check individual scores of essential items
3. Determine preliminary processing decision based on score range
4. Consider special factors (such as urgency, customer relationship, etc.)
5. Make final processing decision
6. Complete inspection result report
7. Notify relevant personnel of the decision

9. Inspection Flowchart

Receive STL File
      │
      ▼
Basic Information Inspection
      │
      ▼
Geometric Structure Inspection
      │
      ▼
Dental Professional Standards Inspection
      │
      ▼
Technical Parameters Inspection
      │
      ▼
Special Situations Inspection (if applicable)
      │
      ▼
Model Repair Assessment (if needed)
      │
      ▼
Comprehensive Score Calculation
      │
      ▼
Final Decision Making
      │
      ▼
Decision Implementation

10. Appendix: Inspection Table

Dental Restorative STL Model Inspection Standard Summary Table

Inspection Category	Inspection Items	Specific Requirements	Rating Standards (1-5)	Processing Method
Basic File Information	File Format	STL/OBJ/AMF format	5: Standard STL format without errors 3: Other supported formats 1: Unsupported format or serious errors	5-4: Pass 3: Use after conversion 1-2: Return for resubmission
	File Size	Generally not exceeding 30MB	5: 5-30MB 3: 30-50MB or 3-5MB 1: >50MB or <3MB	5-4: Pass 3: Use after optimization 1-2: Return for rescan
	File Naming	Including patient ID, tooth position, date	5: Fully complies with naming convention 3: Complete basic info but non-standard format 1: Incomplete information	5-3: Pass (requires renaming) 1-2: Request additional information
	Scan Source	Specify intraoral/model/impression scan	5: Clearly marked and consistent with actual 3: Source can be inferred 1: Source cannot be determined	5-3: Pass 1-2: Confirm with provider
Geometric Structure	Mesh Density	Not less than 3 million faces	5: >5 million faces 4: 3-5 million faces 3: 2-3 million faces 2: 1-2 million faces 1: <1 million faces	5-4: Pass 3: Suitable for some prostheses 1-2: Return for rescan
	Model Completeness	No holes, missing parts or damage	5: 100% complete 4: ≥98% complete, minor defects 3: 95-98% complete, repairable defects 2: 90-95% complete, major defects 1: <90% complete	5-4: Pass 3: Use after repair 1-2: Return for rescan
	Watertightness	Model is a closed watertight body	5: 100% watertight 4: Almost watertight, tiny leaks 3: Repairable leaks 2: Multiple leaks 1: Severely non-watertight	5-4: Pass 3: Use after repair 1-2: Return for rescan
	Mesh Topology	No non-manifold edges, inverted faces, self-intersections	5: No topology errors 4: <10 minor topology errors 3: 10-30 repairable topology errors 2: 31-50 topology errors 1: >50 topology errors	5-4: Pass 3: Use after repair 1-2: Return for rescan
Dental Professional Standards	Preparation Margin	Margins clear, continuous, closed	5: 100% clear & continuous 4: ≥95% clear, minor blur 3: 90-95% clear, partially repairable 2: 80-90% clear, multiple discontinuities 1: <80% clear	5-4: Pass 3: Suitable for some prostheses 1-2: Return for rescan
	Preparation Axial Walls	Smooth, continuous, without irregularities	5: Ideally smooth & even 4: Minor irregularities, not affecting use 3: Moderate irregularities, repairable 2: Obvious irregularities, difficult to repair 1: Severe irregularities	5-4: Pass 3: Use after repair 1-2: Return for rescan
	Occlusal Relationship	Accurate occlusal relationship	5: Perfect occlusal relationship 4: Minor deviation, can be used directly 3: Moderate deviation, needs adjustment 2: Obvious deviation 1: Severe misalignment	5-4: Pass 3: Use after adjustment 1-2: Return for rescan
	Proximal Relationship	Natural proximal area morphology, appropriate contact point position	5: Ideal proximal relationship 4: Minor deviation, not affecting use 3: Moderate deviation, adjustable 2: Obvious deviation 1: Severe misalignment	5-4: Pass 3: Use after adjustment 1-2: Return for rescan
	Gingival Interface	Clear gingival margin line, appropriate sulcus depth(0.5-1.0mm)	5: Ideal sulcus depth & clarity 4: Minor deviation in sulcus depth 3: Moderate deviation in sulcus depth 2: Unclear sulcus 1: Missing or too deep sulcus	5-4: Pass 3: Usable with reduced margin quality 1-2: Return for rescan
Technical Parameters	Single Tooth Internal Accuracy	≤50μm	5: ≤30μm 4: 30-50μm 3: 50-70μm 2: 70-100μm 1: >100μm	5-4: Pass 3: Margin acceptable but internal adjustment needed 1-2: Return for rescan
	Single Tooth External Accuracy	≤30μm	5: ≤20μm 4: 20-30μm 3: 30-50μm 2: 50-80μm 1: >80μm	5-4: Pass 3: Use after adjustment 1-2: Return for rescan
	Multi-unit Overall Accuracy	≤100μm	5: ≤50μm 4: 50-80μm 3: 80-100μm 2: 100-150μm 1: >150μm	5-4: Pass 3: Margin acceptable but overall adjustment needed 1-2: Return for rescan
	Preparation Margin Resolution	≤20