How Should Intraoral Scan Files Be Sent to a Digital Dental Lab?

Introduction

Intraoral scan files should be sent to a digital dental lab with complete scan data, a clear lab prescription, bite scan, opposing arch, shade photos, material request, restoration type, tooth number and any special dentist instructions. The file transfer method matters, but the completeness of the case information matters just as much.

A digital dental lab cannot design a predictable restoration from scan files alone if the clinical requirements are unclear. The lab needs to know what restoration is required, which tooth is involved, what material is expected, how the bite should be interpreted and whether there are esthetic or implant-related details that affect the final design.

For esthetic cases such as Porcelain Veneers, dentists should send accurate scan files, shade photos, preparation details, smile line references and design expectations before digital design begins.

This article explains how intraoral scan files should be prepared, named, checked and sent to a digital dental lab for case review and production.

Key Takeaway

Sending intraoral scan files to a digital dental lab is not only a file transfer task. It is a digital case submission process.

Key points include:

• The scan should capture the preparation, margin, adjacent teeth and soft tissue clearly.

• The opposing arch and bite scan should be included when occlusion matters.

• STL, PLY and DCM files may be used depending on scanner system and lab workflow.

• The lab prescription should explain restoration type, tooth number, material and design expectations.

• Shade photos are important for anterior, veneer and esthetic cases.

• Implant cases should include implant system, scan body and component details.

• File names should be clear enough for case tracking.

• Dentists should avoid sending old versions without marking revisions.

• The lab should review files before design and ask for clarification when needed.

• Design approval may be useful for veneers, implant restorations, full-arch cases and complex esthetic cases.

In short, good digital dental lab file submission includes accurate files and complete clinical instructions.

Why File Submission Matters for a Digital Dental Lab

A digital dental lab uses scan files as the foundation for CAD/CAM design, digital model work, milling, printing and final restoration production. If the file is incomplete, poorly named, missing the bite scan or not supported by a clear prescription, the lab may need to pause the case and request more information.

Good file submission helps improve:

• case review speed;

• margin identification;

• fit planning;

• occlusal design;

• shade communication;

• material selection;

• implant component matching;

• denture design;

• design approval;

• production consistency.

Digital workflow can reduce manual handling, but it does not remove the need for clinical communication. A clean scan without a clear prescription still creates uncertainty.

What Intraoral Scan Files Should Be Sent?

A complete digital case usually includes more than one scan file. The exact file set depends on the restoration type, but most cases should include the preparation scan, opposing arch and bite relationship.

Dentists may need to send:

• preparation arch scan;

• opposing arch scan;

• bite scan;

• pre-op scan if useful;

• temporary restoration scan if relevant;

• tissue scan for removable or implant cases;

• implant scan body scan;

• shade photos;

• smile photos;

• lab prescription;

• material request;

• design notes.

For a single crown, the lab usually needs the prepared tooth, adjacent teeth, opposing arch and bite scan. For veneers, the lab may also need smile line photos and esthetic references. For implant cases, scan body and implant system details are essential.

Common Dental Scan File Formats

Different digital dental lab workflows may accept different file formats. Dentists should confirm the preferred format with the lab before sending the case.

STL files are widely used in digital dental workflows because they contain 3D surface geometry. PLY files may carry color information in some workflows, which can help with esthetic review. DCM files are often related to scanner-specific systems and may be useful when the lab uses a compatible digital platform.

The correct dental scan file format should be confirmed before production begins.

What Should Dentists Check Before Sending Scan Files?

Before sending intraoral scan files, dentists should review whether the scan is usable for design. A digital dental lab can only design from the data it receives.

Important scan checks include:

If the margin is unclear, the bite scan is missing or the wrong file version is sent, the lab may need to request clarification before design.

Preparation and Margin Capture

Margin clarity is critical for crowns, bridges and veneers. If the margin is not visible in the intraoral scan file, the digital dental lab may not know where to finish the restoration.

Dentists should check:

• full preparation capture;

• visible finish line;

• no tissue coverage over the margin;

• no scan voids near the margin;

• no distortion around the prepared tooth;

• enough adjacent tooth data;

• adequate clearance for the selected material.

A scan that looks complete from a distance may still be unsuitable if the margin area is unclear. Reviewing the scan before sending it helps reduce repeated questions and design delays.

Opposing Arch and Bite Scan

The opposing arch and bite scan help the lab design occlusion. Without this information, the digital dental lab may not understand how the restoration should contact the opposing teeth.

Bite scan and opposing arch data are important for:

• crowns;

• bridges;

• veneers;

• implant restorations;

• full-arch cases;

• removable dentures;

• cases with limited occlusal stops;

• cases with vertical dimension changes.

A bite scan should capture a stable relationship between upper and lower arches. If the bite scan is incomplete or distorted, the final restoration may require more chairside adjustment.

Soft Tissue and Edentulous Areas

Some digital cases require more soft tissue information than others. Removable dentures, implant restorations and full-arch cases often require tissue support, gingival contour and emergence profile information.

Soft tissue capture may be important for:

• removable denture base design;

• partial denture support;

• implant emergence profile;

• tissue contour around implant restorations;

• full-arch prosthetic design;

• esthetic gingival design.

For removable cases, LEZY Lab’s Custom Dentures service can accept STL, PLY and DCM files or traditional impression models, along with bite records, tooth shade, gum shade expectations and dentist instructions.

When digital soft tissue records are incomplete, a traditional impression model or printed model may be useful as supporting information.

Scan Body Position for Implant Cases

Implant cases require accurate scan body information. The digital dental lab uses the scan body to determine implant position, angulation and connection.

Dentists should provide:

• implant brand;

• implant system;

• platform size;

• implant position;

• scan body type;

• confirmation that the scan body is fully seated;

• Ti-base or abutment request;

• screw-retained or cement-retained design preference;

• emergence profile notes;

• bite scan;

• opposing arch.

If scan body information is incomplete or incorrect, the lab may not be able to design the implant restoration accurately. This can delay production or increase remake risk.

What Case Information Should Be Sent With Scan Files?

Scan files show geometry, but they do not explain the full clinical request. A digital dental lab also needs written case information.

A complete digital case submission combines scan files with clinical instructions. Sending files alone may not give the lab enough information to begin design confidently.

Lab Prescription

The lab prescription should clearly state what the dentist wants the lab to make. It should not be vague or incomplete.

A useful lab prescription includes:

• clinic name;

• dentist name;

• patient or case ID;

• tooth number;

• restoration type;

• material request;

• shade;

• margin notes;

• occlusal notes;

• implant details if applicable;

• design instructions;

• delivery expectation.

For example, “crown” is not enough. The digital dental lab may need to know whether the case requires zirconia, layered zirconia, veneer, implant crown, temporary restoration or another option.

Shade Photos and Esthetic Notes

Shade photos are important for anterior restorations and cases with visible esthetic requirements. A written shade code may not show translucency, value, surface texture or surrounding tooth context.

Useful photos may include:

• full-face smile photo;

• retracted smile photo;

• shade tab photo;

• close-up tooth photo;

• stump shade photo if needed;

• pre-op reference photo;

• lateral view;

• occlusal view.

Esthetic notes may include tooth shape, translucency expectation, surface texture, incisal effect, cervical shade and smile line preference. These details can help the lab design a restoration that better matches the dentist’s expectations.

File Naming and Version Control

Clear file naming helps prevent case tracking errors. A digital dental lab may receive many cases each day, so files should be easy to identify.

A simple file naming structure may include:

ClinicName_CaseID_ToothNumber_RestorationType_Date

Examples:

ABCClinic_2458_Tooth11_ZirconiaCrown_2026-07-29
ABCClinic_2458_UpperArch_2026-07-29
ABCClinic_2458_BiteScan_2026-07-29

Dentists should also mark revised files clearly. If an updated scan replaces an older scan, the lab should know which file is current. Sending multiple versions without explanation can create production confusion.

How to Send Files to a Digital Dental Lab

Different clinics and labs may use different submission methods. The best method depends on scanner system, file size, case complexity and lab workflow.

Dentists should confirm the preferred method with the lab before sending a case. Complex cases may need both digital files and supporting photos or models.

Digital Dental Lab File Submission Flow Chart

Intraoral Scan → Scan Quality Check → File Export → File Naming → Case Prescription → Bite / Opposing Arch → Shade Photos → File Submission → Lab Review → Design Confirmation

This flow shows that digital dental lab file submission should include preparation, documentation and review. It should not stop at exporting an STL file.

File Submission Checklist Before Sending a Case

Clinics can use the following checklist before sending scan files.

This checklist helps reduce missing information and supports smoother digital case review.

Common Mistakes When Sending Intraoral Scan Files

Digital case delays often come from incomplete submission rather than the scanner itself.

Avoiding these mistakes helps the digital dental lab begin design with clearer information.

When Design Approval May Be Needed

Not every case requires design approval, but it can be useful when the case is complex or esthetically demanding.

Design approval may help for:

• anterior veneers;

• implant restorations;

• full-arch cases;

• Malo bridges;

• removable dentures;

• cases with vertical dimension changes;

• smile design cases;

• cases with major contour requests;

• cases involving multiple units.

Design approval can include screenshots, digital previews, annotated notes or written confirmation. This step helps dentists and the lab align expectations before manufacturing begins.

How LEZY Lab Supports Digital Case Submission

LEZY Lab supports dentists and clinic partners with digital case submission, case review and custom dental restoration workflows. For digital cases, scan files should be reviewed together with the prescription, bite scan, shade photos, material request and dentist instructions before production.

LEZY Lab can help review:

• STL files;

• PLY files;

• DCM files;

• intraoral scan quality;

• traditional impression models when needed;

• lab prescriptions;

• tooth numbers;

• restoration types;

• material requests;

• shade photos;

• bite scans;

• opposing arch data;

• implant scan body details;

• denture design notes;

• delivery expectations.

For veneers, implant restorations, removable dentures or full-arch cases, LEZY Lab can help confirm whether the submitted intraoral scan files and case information are clear enough for digital design.

Conclusion

Intraoral scan files should be sent to a digital dental lab only after the clinic checks scan quality, exports the correct file format, names the files clearly and attaches complete case information. A complete submission should include the preparation scan, opposing arch, bite scan, lab prescription, tooth number, restoration type, material request, shade photos, implant details when needed and design notes.

Clear scan files and complete case information help reduce avoidable delays, design questions and remake risk. However, clinical conditions and patient-specific factors may still affect the final result.

Need help sending intraoral scan files correctly? Contact LEZY Lab for digital case submission support with your STL, PLY or DCM files, prescription, bite scan, opposing arch, shade photos, implant details and material request.

FAQ

1. How should intraoral scan files be sent to a digital dental lab?

Intraoral scan files should be sent with the correct file format, clear file names, lab prescription, tooth number, restoration type, opposing arch, bite scan, shade photos, material request and case notes.

2. What file formats can be used for digital dental lab submission?

Common formats include STL, PLY and DCM. The preferred format depends on the scanner system and the digital dental lab workflow.

3. Is an STL file enough for a dental lab?

An STL file may provide 3D surface geometry, but it is not always enough. The lab usually also needs a prescription, bite scan, opposing arch, shade information and restoration details.

4. Why does the opposing arch need to be sent?

The opposing arch helps the digital dental lab design occlusion and contact with the opposing teeth. Without it, bite planning may be less predictable.

5. Why is the bite scan important?

The bite scan shows the relationship between the upper and lower arches. It helps the lab design occlusion and reduce adjustment risk.

6. What should dentists check before sending scan files?

Dentists should check preparation capture, margin clarity, scan completeness, opposing arch, bite scan, file format, file name, prescription and any implant or shade information.

7. What information is needed for implant scan cases?

Implant cases need implant system, platform size, scan body type, scan body seating confirmation, Ti-base or abutment request, implant position, bite scan and opposing arch.

8. How should scan files be named?

File names should include clinic name, case ID, tooth number, restoration type and date. Revised files should be marked clearly.

9. When is design approval useful?

Design approval is useful for veneers, implant restorations, full-arch cases, removable dentures and cases with complex esthetic or functional requirements.

10. Can LEZY Lab review intraoral scan files before production?

Yes. LEZY Lab can review STL, PLY or DCM files, prescriptions, bite scans, opposing arch data, shade photos, material requests, implant details and case notes before production.