Intraoral
Scanning.
No trays.
No putty.
Just precision.
The traditional dental impression is one of the most uncomfortable experiences in dentistry — and also one of the least accurate. A wand-shaped optical scanner captures your tooth geometry in real time at sub-25 micron accuracy, assembling a 3D model on screen as it moves across your teeth. No trays. No gagging. No putty. No plaster. No waiting. The digital model is available in minutes and feeds directly into CEREC same-day crowns, implant planning software, and Digital Smile Design.
Thousands of images
per second. One
precise 3D model.
A conventional dental impression works by pressing a tray of viscous putty material against the teeth, allowing it to set around them, and pulling the tray away — capturing a negative mould of the tooth surfaces. This process has three fundamental weaknesses: the material shrinks slightly as it sets (distortion), the tray must be pulled away from undercuts (distortion), and the resulting plaster model that is cast from the impression expands slightly as it sets (a second distortion). Each variable is small — but they accumulate, and the final crown or restoration is fabricated against a model that does not perfectly represent the actual teeth.
An intraoral scanner captures the tooth geometry directly and optically — without physical contact with the impression material. The scanner wand contains a camera system that emits structured light or a low-power laser, captures thousands of images per second as it moves across the teeth, and uses photogrammetric algorithms to assemble these into a real-time three-dimensional mesh on screen. The digital model represents the actual tooth surfaces with sub-25 micron accuracy — significantly more accurate than the conventional impression chain. The model does not shrink, distort on removal, or require couriering to a laboratory. It feeds directly into the next digital workflow step — whether that is CEREC milling, implant planning software, or DSD design.
No impression trays, no material preparation, no waiting for set time. Where teeth are heavily prepared (crown preparations), they are dried and retraction cord is placed where gingival margin capture is needed — the same clinical protocol as any impression, but without the putty. Most patients require no preparation at all.
The scanner wand is moved systematically across the occlusal surfaces (biting surfaces), then the buccal surfaces (cheek side), then the lingual surfaces (tongue side) of each arch. The 3D model builds in real time on the screen — Dr. Haris can see coverage and rescan any area missed. Both arches and a bite registration scan are captured in 2–5 minutes total.
The completed scan is reviewed on screen immediately. Gaps in coverage, inaccurate areas, or tissue interference are visible in real time — and can be rescanned by passing the wand over the affected area again. There is no wait for material to set, no re-impression after removing the tray, and no discovering a problem after the patient has left.
The validated 3D model is exported in STL, PLY, or OBJ format — the universal digital exchange format for dental manufacturing systems. It imports directly into CEREC design software for same-day crown fabrication, into implant planning software combined with CBCT data, into DSD smile simulation, or transmitted electronically to the laboratory with full colour photography — no courier, no physical model, no chain of custody risk.
The digital model is stored in the clinic's system indefinitely. At every subsequent visit, the current scan can be compared to the archived model — changes in tooth wear, gum recession, or restoration margins are measurable, not just visible. For patients undergoing phased treatment across multiple appointments, the archived scan eliminates the need to re-scan if the same model is required.
Every problem with
conventional impressions — solved.
The intraoral scanner does not improve conventional impressions — it replaces them entirely. Here is what each step of the analogue process introduces, and what happens instead with digital scanning.
One scan. Four
clinical workflows.
The intraoral scan at Hassaan Dental is not a standalone step — it is the single digital source of truth that feeds into every major treatment workflow. One scan, validated in real time, used across the entire treatment plan.
The intraoral scan is the required input for CEREC. After tooth preparation, the scan captures the prepared tooth, adjacent teeth, opposing arch, and bite — the CEREC design software loads this model directly and Dr. Haris designs the crown on-screen. The design goes to the mill. Crown bonded same day.
Explore CEREC Crowns →After implant integration, the intraoral scan of the scan body (a calibrated component placed on the implant) captures the implant's exact position and angulation in three dimensions. Combined with CBCT bone data, this allows abutment and crown design with precise emergence profile — without physical impression at the implant level.
Explore Implant Options →The DSD protocol uses the intraoral scan combined with facial photography to design the planned tooth shapes digitally — superimposed on the patient's actual face. The scan model is also used to fabricate the diagnostic mock-up, which goes on unprepared teeth to let the patient physically experience the planned outcome before committing.
Explore DSD →For multi-unit restorations, complex bridgework, or cases requiring skilled ceramist layering for maximum aesthetic translucency, the STL file is transmitted electronically to the laboratory. No physical impression is shipped — the lab receives an accurate digital model, a full prescription, and clinical photography, and fabricates the restoration to the same precision as a chairside CEREC case.
Explore Veneers →Intraoral scans at the start, mid-point, and end of orthodontic treatment provide digitally comparable records — tooth movement is quantifiable, not just visible. Post-treatment scans are used to fabricate retainers digitally, eliminating the conventional impression step that patients with gag reflexes find particularly difficult.
Explore Orthodontics →The surgical guide for guided implant placement requires both CBCT bone data and an intraoral scan of the dental arch — the two are merged in planning software to design the guide that fits over the patient's actual teeth. The guide is then 3D-printed from this combined model and places the implant to within ±0.1mm of the digitally planned position.
Explore CBCT →What a scan appointment
actually feels like.
The most common patient reaction after an intraoral scan is surprise at how different it is from a conventional impression. Here is what to expect.
No preparation is required for intraoral scanning. No trays are selected, no putty is mixed, no material needs to be dispensed or timed. Dr. Haris or the dental nurse simply picks up the scanner wand and begins. The screen is positioned so you can watch the 3D model building in real time if you'd like — most patients find this engaging rather than anxiety-inducing.
The scanner wand is moved across your teeth in a systematic pattern — occlusal surfaces first, then buccal, then lingual. The wand emits light, not X-rays — there is no radiation. It does not touch your gums, palate, or throat. It is about the size of an electric toothbrush handle. The scan of both upper and lower arches plus the bite takes 2–5 minutes depending on the clinical need. You can breathe normally, swallow, and move your tongue without interrupting the scan.
The 3D model appears on screen as the scanner moves — you can watch your own teeth being digitally reconstructed in real time. Any incomplete area is visible immediately, and Dr. Haris passes the scanner over it again to complete the model. The review takes under a minute. There is no waiting for material to set, no discovering a problem after the impression has been poured, and no second appointment for a re-impression.
The validated scan imports directly into the next clinical step — no waiting, no couriering. For CEREC cases, Dr. Haris begins designing the crown on screen within minutes of completing the scan. For implant planning, the scan is merged with CBCT data. For DSD cases, the scan is combined with facial photography in the design software. The digital model is available for all downstream use simultaneously — no re-scanning per workflow.
Conventional impression putty in a tray that contacts the posterior palate or throat is one of the most common triggers for severe gag reflex in dentistry. The intraoral scanner wand does not contact the palate, the posterior of the throat, or any soft tissue. Patients who have previously found dental impressions intolerable — or who have avoided crown treatment specifically because of impression anxiety — typically scan without difficulty. Dr. Haris is experienced in managing patients with gag reflex and uses the scanner as the standard approach for all patients who have previously struggled.
Intraoral scanning in
clinical numbers.
The accuracy improvement of intraoral scanning over conventional impressions is measurable and published. These figures come from peer-reviewed digital impression literature.
A crown fabricated on a model with 200µm of cumulative error from the impression chain will not fit as precisely as one fabricated from a <25µm digital scan. The clinical consequence: a marginal gap that is larger than optimal allows bacterial infiltration, secondary decay, and restoration failure over time. A well-fitting crown margin is one of the most important determinants of crown longevity — and the accuracy of the impression is one of the most important determinants of margin fit. CEREC CAD/CAM crowns milled from intraoral scan data achieve margin gaps comparable to the best laboratory fabrication methods — and consistently outperform conventional impression-based laboratory crowns in controlled digital accuracy studies. The same logic applies to implant abutments, veneers, and orthodontic appliances: better input data produces better fitting final restorations.
Digital scan vs conventional
impression — every dimension.
A complete head-to-head across accuracy, patient experience, workflow, and clinical outcome.
| Dimension | ★ Digital Scan | Conventional Impression |
|---|---|---|
| // ACCURACY | ||
| Dimensional accuracy | <25 microns | 200–500 microns (accumulated) |
| Material shrinkage error | ✓ Zero — optical capture | ✗ 0.2–0.5% polymerisation |
| Removal distortion | ✓ None — no material to remove | ✗ Present on every impression |
| Model expansion error | ✓ Zero — no plaster model | ✗ 0.1–0.4% dental stone expansion |
| // PATIENT EXPERIENCE | ||
| Gag reflex trigger | ✓ Minimal — no palate contact | ✗ Significant — posterior palate contact |
| Taste / discomfort | ✓ None | ✗ Putty taste, tray pressure |
| Radiation | ✓ Zero — optical light only | ✓ Zero |
| Time in chair | 2–5 minutes | 20–30 minutes (mix, set, degas, pour) |
| // WORKFLOW | ||
| Real-time quality check | ✓ Model visible during scan | ✗ Discovered on removal only |
| Re-scan if needed | ✓ Rescan any area instantly | ✗ Full re-impression required |
| Laboratory transmission | ✓ Electronic · instant · free | ✗ Physical courier · delay · risk |
| Model archival | ✓ Digital · permanent · instant recall | ✗ Physical plaster · degrades over time |
| CEREC same-day crown | ✓ Direct input — required | ✗ Not compatible with CEREC |
| // LIMITATIONS | ||
| Deep subgingival margins | ~ May need retraction · assess per case | ✓ Better capture with retraction cord |
| Full-arch edentulous cases | ~ More challenging · evolving | ✓ Established protocol |
Intraoral scanning
questions answered.
Including the "is it really better?" question — which deserves an honest, evidence-based answer.
No trays.
No putty.
Just a precise
3D model of your teeth.
Every crown, implant restoration, smile design, and retainer at Hassaan Dental is built from a digital scan — not a physical impression. PKR 1,000 consultation includes OPG X-ray and full clinical assessment.
