Dental Impression Capture for Crowns With a Scanner

A dental impression for a crown must give the lab a clear record of the prepared tooth and its surroundings. The file also needs adjacent teeth, the opposing arch, and the record of how the teeth meet. For your clinical team, the aim is a usable case package with enough detail for crown design. This guide follows those records from chairside capture to lab review, with practical checks you can build into daily work.

Start by agreeing on the case needs with your dental lab. Digital dental impressions bring several records together, so a clear prep scan alone does not complete the case. Check the tooth number, planned crown, required scan extent, and accepted transfer method before the visit. Also decide whether the technician needs preoperative scans or photographs. This planning helps your team collect the right records once. It can prevent gaps that only emerge after the patient leaves.

A scanner records what the clinician creates. Before capture, review the prep and make sure the finish line is in view. The dentist should choose tissue management and moisture control suited to the case. Meanwhile, the assistant can manage suction and soft-tissue retraction without blocking the scanner tip. Follow the scanner’s instructions for tip setup and fog control. If blood or saliva obscures the margin, address the cause before trying another pass.

A margin obscured by tissue, blood, saliva, or powder-like noise is not ready for crown design. A 2017 BMC Oral Health review explains that optical scanning can struggle with deep finish lines and bleeding. Use that finding as a reason to check visibility carefully, rather than assume that software will recover hidden anatomy. Next, check the screen as you capture the area. If access remains inadequate, the dentist should review the recording method for that case.

Follow the manufacturer’s scan strategy for the chosen system and restoration. Keep a stable view of recognizable tooth surfaces as you move around the prep. Then view the prep from above, the cheek side, the tongue side, and between adjacent teeth. Look for a continuous finish line, complete prep walls, and missing patches near the gum edge. Avoid relying on an attractive colour image alone. The underlying surface record must contain the detail that the technician needs to define the crown margin.

Next, capture the neighbouring tooth surfaces needed for proximal contacts and crown contours. Check both sides of the prep where adjacent teeth are present. In particular, look for areas that cheeks, the tongue, or tight access may hide. Use the lab’s needs and the scanner instructions to choose the scan extent. If part of the dental impression needs correction, follow the software’s local rescan process. Review the repaired area and its connection to the surrounding model before continuing.

The opposing arch provides the anatomy against which the technician designs the crown’s occlusal surface. Therefore, capture the required teeth with clear cusp and groove detail, following the agreed scan extent. Check for holes, doubled surfaces, or warping that could affect the model. Make sure the opposing scan has enough occlusal anatomy for the planned crown. Use the agreed case needs to judge coverage. Finally, confirm that the opposing scan belongs to the same case and visit records.

Once the required arch data are available, record the bite using the system's instructions. Ask the patient to close into the intended position without the tip preventing closure. Capture the views that the system requires; the number and location can vary. Then compare the aligned model with the clinical bite. Check for an obvious shift, implausible contacts, or a jaw relationship that differs from what the dentist observed. Investigate a mismatch before sending the case.

Check that the bite scan aligns without visible shift. However, a visual check cannot prove every aspect of scan accuracy. Repeated scans may help reveal inconsistent results, but consistency does not establish trueness, or closeness to the actual shape. If repeat captures disagree, review access, moisture, scan technique, and software instructions. When you assess an AJAX intraoral scanner, discuss these checks with your supplier and lab. Use a typical crown case. Ask for evidence for the selected model to assess performance beyond a demonstration.

Before export, rotate the dental impression and review it as a complete case. Check that the prep scan is complete, with a visible continuous margin. Also compare the adjacent contacts, opposing arch, and bite alignment together. Inspect areas that the software has repaired or filled, especially near the finish line. If missing data could affect crown design, return to the right capture stage. Where available, use the system’s review tools, while checking their meaning and limitations in the manufacturer’s instructions.

Next, ask what your selected AJAX model and software can export or send through a lab connection. The AJAX intraoral scanner page provides a starting point for that product discussion. Confirm that the file format matches the lab’s accepted workflow. Ask whether the chosen format carries the details your technician needs, including colour when useful. Also check how the files preserve the bite alignment. Do not assume that a file extension alone proves compatibility with the lab’s design software or case management process.

Case notes identify tooth number, margin concerns, and material plan. Add the crown type, shade documentation where needed, and any clinical questions that need the technician's attention. Then identify the prep scan, opposing scan, and bite record clearly. Include preoperative references only when they help the agreed design. Use your clinic's approved transfer method and only the patient details your lab needs. Before sending, check that the files and notes refer to the same patient, tooth, and case version.

Finally, confirm that the lab can open the files and read the records. For an initial workflow trial, ask the technician to review margin visibility, adjacent surfaces, bite alignment, and case instructions. Resolve any query from the lab before design proceeds. If the team changes a scan or prescription, identify the replacement version and confirm receipt. Keep a record of who checked the case and when. This makes digital impressions in dentistry a coordinated clinical and lab process, with clear responsibility for corrections and case approval.

Before the next visit, follow the manufacturer’s reprocessing instructions for reusable scanner parts and discard single-use items appropriately. CDC sterilization and disinfection guidance explains cleaning before disinfection or sterilization and heat sterilization for heat-tolerant semicritical items. It does not establish one standard cycle for all scanner tips. Also match available tips to your clinic’s processing time. For AJAX equipment planning, use customer service and support to request the needed instructions and check local support arrangements. A reliable dental impression workflow combines complete records, a clear lab handoff, and planned equipment turnover.