CBCT
3D Imaging.
See everything
a flat X-ray
cannot.
A conventional dental X-ray is a shadow — a flat projection of a three-dimensional structure. CBCT (Cone Beam Computed Tomography) produces a true 3D volumetric dataset of the jaw, teeth, roots, nerve canals, and sinuses — allowing Dr. Haris to measure bone depth precisely, see nerve positions in three planes, and plan implant placement before a single incision is made.
A rotating beam.
Hundreds of slices.
One 3D dataset.
CBCT works on the same X-ray principle as all dental imaging — a beam of radiation passes through tissue, and what emerges is detected to produce an image. What is different is the geometry and the output. In a conventional OPG, a fan-shaped beam sweeps around the head in a single pass and produces one flat image — a 2D shadow of a 3D structure, with anatomy stacking on top of anatomy in ways that compress and distort spatial relationships. In CBCT, a cone-shaped beam rotates around the head, capturing hundreds of individual projection images from different angles. A reconstruction algorithm — similar in principle to the process used in medical CT — combines these projections into a true three-dimensional volumetric dataset.
Dr. Haris can then navigate this dataset in any plane — axial (top-down), coronal (front-back), sagittal (side-side) — and at any position. He can measure the exact bone depth at a planned implant site, trace the inferior alveolar nerve canal in three dimensions, assess sinus floor elevation, and generate cross-sections through any root to see canal morphology. The data can be exported to implant planning software to design the surgical approach digitally before the patient sits in the chair.
The patient sits or stands in the CBCT unit — stabilised by a chin rest and head positioning guides to minimise movement during the scan. No injection, no preparation, no discomfort.
The CBCT arm rotates around the head in a single pass — typically 10–40 seconds. A cone-shaped X-ray beam is emitted toward the area of interest (jaw, full skull, or specific region — determined by the clinical need). The detector captures 150–600 individual projection images during this single rotation.
The projection images are processed by the CBCT software's reconstruction algorithm — producing a complete 3D volumetric dataset in minutes. The resulting dataset typically has a voxel resolution of 0.08–0.4mm (a voxel is the 3D equivalent of a pixel). The dataset is available immediately on the clinic's workstation.
Dr. Haris navigates the dataset — measuring bone dimensions, tracing nerve canals, assessing root anatomy, identifying pathology — and documents findings. For implant cases, the CBCT data is imported into implant planning software where the implant position is planned digitally before the surgical appointment.
Where guided implant surgery is planned, the CBCT data (combined with the intraoral scan) feeds into a 3D-printed surgical guide — a custom stent that fits over the teeth and guides the implant drill to the planned position with sub-millimetre accuracy. This eliminates the positional uncertainty of freehand implant placement.
Six anatomical datasets
a flat X-ray cannot give you.
CBCT doesn't just produce a better-looking image — it produces different data. Here is what the 3D dataset reveals that no 2D projection can.
An OPG shows bone height in one projection — it cannot show bone width or depth. CBCT provides exact bone dimensions in all three planes at any proposed implant site: height from crest to nerve canal, width from buccal to lingual plate, and density by Hounsfield unit estimation.
The inferior alveolar nerve runs through the mandible below the molar and premolar roots. Damaging it during implant placement causes permanent numbness or paraesthesia of the lower lip — one of the most serious implant complications. CBCT traces the canal in three dimensions, allowing Dr. Haris to measure the exact distance from planned implant apex to nerve at every millimetre of depth.
Upper posterior implant sites often have limited bone above the maxillary sinus. CBCT provides cross-sectional images of the sinus floor at every proposed implant site — enabling precise measurement of available sub-sinus bone height and determining whether a sinus lift is required, and if so, by how many millimetres.
Root curvature, length, resorption, accessory canals, and canal configuration (number and branching) are all critical endodontic and extraction planning data. An OPG superimposes roots in the buccal-lingual dimension, masking these features. CBCT produces true cross-sectional root images at any level — C-shaped canals, dilacerated roots, and resorption extent are all visible.
Periapical cysts, dentigerous cysts, odontogenic tumours, and bone lesions all appear differently in 3D than in 2D projection. CBCT reveals lesion size, extent, cortical plate involvement, and proximity to vital structures — information essential for determining treatment approach and prognosis.
Large-field CBCT provides 3D airway volume measurements — used in sleep apnoea assessment and orthodontic-surgical planning. Temporomandibular joint (TMJ) morphology, condylar shape, joint space, and bony changes are assessable in three planes — providing data that conventional OPG fundamentally cannot capture due to anatomical overlap.
When CBCT changes
the clinical decision.
CBCT is prescribed at Hassaan Dental when the 3D data will meaningfully change the treatment plan or improve safety — not routinely for every patient. Here are the clinical situations where it is indicated.
The primary indication for CBCT in general dental practice. Bone volume, nerve canal position, sinus floor elevation, and bone density are all critical implant planning variables that OPG cannot reliably provide. CBCT data feeds directly into implant planning software and surgical guide fabrication.
Lower wisdom teeth (third molars) often lie in close proximity to the inferior alveolar nerve — a relationship that OPG can only approximate. CBCT reveals the exact relationship between root apices and the nerve canal, allowing Dr. Haris to assess the true risk of nerve involvement and plan the extraction approach accordingly.
C-shaped canals, extra roots, root resorption extent, and missed canals in teeth that have failed conventional root canal treatment — all require CBCT for accurate 3D diagnosis. CBCT is also used pre-operatively for apicoectomy planning to confirm the root apex position and proximity to anatomical structures.
Impacted canines (position, angulation, proximity to adjacent roots), skeletal jaw relationship in 3D, bone density at proposed temporary anchorage device (TAD) sites, and airway volume are all assessed with CBCT for complex orthodontic and surgical cases. 3D models can be extracted from CBCT data for virtual surgical planning.
When a periapical X-ray or OPG reveals a radiolucency or lesion of uncertain extent, CBCT defines the volumetric size, cortical plate status, and proximity to vital structures — informing the decision between conservative management, enucleation, or specialist referral.
Large-field CBCT allows measurement of upper airway cross-sectional area at multiple levels — relevant to obstructive sleep apnoea assessment and orthodontic-surgical planning. TMJ (jaw joint) morphology, condylar head shape, joint space, and degenerative changes are assessable in three planes — data unavailable from OPG or clinical examination alone.
Routine dental examinations and check-up X-rays do not require CBCT. Periapical X-rays and OPG provide sufficient diagnostic information for most preventive and routine restorative needs.
Standard restorative treatment does not require 3D bone imaging. CBCT adds no diagnostic value beyond the periapical X-ray already taken for most filling and crown cases.
Clearly erupted teeth with simple roots and no adjacent nerve risk do not require CBCT — a periapical X-ray provides sufficient pre-extraction information in most cases.
At Hassaan Dental, CBCT is prescribed using the ALARA (As Low As Reasonably Achievable) radiation principle — only when the diagnostic benefit from the 3D data is expected to change the clinical management or meaningfully improve patient safety.
From assessment to
3D-guided treatment.
How a CBCT scan fits into your clinical journey — from the decision to scan through to treatment planning and execution.
Dr. Haris first performs a clinical examination and reviews any existing X-rays. CBCT is only ordered when the 3D data will meaningfully change the treatment plan or improve safety. The specific clinical question the scan must answer — implant site assessment, nerve canal localisation, root anatomy clarification — is defined before scanning. Field of view (FOV) is selected to cover only the anatomically relevant area, minimising radiation dose.
The patient is positioned in the CBCT unit — seated or standing depending on the machine — with the head stabilised by a chin rest and positioning guides. The scan itself takes 10–40 seconds as the arm rotates once around the head. The patient must remain still during this rotation. No injection, no dye, no preparation of any kind is needed. There is no claustrophobia risk — CBCT units are open, unlike medical CT tunnel scanners.
The software reconstructs the 3D volumetric dataset from the projection images — typically available within minutes. Dr. Haris reviews the dataset systematically: axial slices (top-down view), coronal sections (front-back), sagittal sections (side view), and cross-sectional cuts at specific anatomical locations. For implant cases, precise measurements are taken at each proposed implant site — bone height, bone width, distance to nerve canal or sinus floor.
For implant cases, the CBCT data is imported into digital implant planning software. Dr. Haris positions the planned implant(s) virtually — selecting length, diameter, and angulation based on the bone anatomy. The software displays real-time clearance to the nerve canal and sinus floor at every millimetre of depth. The ideal implant position is confirmed digitally before the patient returns for surgery — and the planning data is used to fabricate the 3D-printed surgical guide if guided surgery is planned.
The CBCT findings and treatment plan are discussed with the patient — using the 3D dataset on screen to show exactly what the scan reveals. For implant cases, the planned implant position can be shown in the actual 3D bone anatomy, with nerve canal clearance visible. For complex extractions, the nerve relationship is demonstrated in cross-section. This transforms the pre-treatment discussion from abstract ("I think there's enough bone") to evidence-based ("here is the measurement").
Where guided implant surgery is planned, the 3D-printed surgical guide is seated over the teeth at the surgical appointment, restricting drill angulation and depth to the pre-planned values — placing the implant within ±0.1mm of the planned position. For non-implant cases (complex extractions, endodontics), the CBCT data informs the surgical approach in real time — root curvature, bone removal requirement, and nerve proximity are all known quantities rather than intraoperative discoveries.
What 3D imaging achieves
in clinical numbers.
The clinical value of CBCT-guided treatment is measurable. These figures come from peer-reviewed literature on guided implant surgery and CBCT clinical outcomes.
Freehand implant placement relies on the surgeon's mental model of where the nerve canal and sinus floor are — built from 2D X-rays that cannot represent the anatomy in three dimensions. Experienced clinicians achieve approximately ±1mm positional accuracy freehand — which in some sites (shallow mandibles, short sub-sinus bone) creates a real margin for error. CBCT-based planning combined with a 3D-printed surgical guide reduces this to ±0.1mm — a 10-fold improvement in precision. The practical benefit: implants can be placed safely in sites where freehand surgery would be inadvisable. Nerves that are 2mm below the planned implant apex in the CBCT data remain 2mm away in the surgical guide-restricted placement — not estimated, verified.
CBCT vs every other
dental imaging option.
Each imaging modality has its role. CBCT is not always better — it is better for specific clinical questions. Here is where each excels and where each falls short.
| Feature | ★ CBCT 3D | OPG (Panoramic) | Periapical X-Ray | Medical CT |
|---|---|---|---|---|
| // 3D_CAPABILITY | ||||
| 3D volumetric data | ✓ Yes — full 3D | ✗ 2D only | ✗ 2D only | ✓ Yes |
| Bone width measurement | ✓ Exact | ✗ Cannot | ✗ Cannot | ✓ Yes |
| Nerve canal 3D path | ✓ Sub-mm precision | ~ Approximate 2D | ✗ Limited view | ✓ Yes |
| Implant guide generation | ✓ Direct data source | ✗ Not possible | ✗ Not possible | ✓ Yes |
| // ANATOMY_COVERAGE | ||||
| Full mouth overview | ✓ Yes (large FOV) | ✓ Standard role | ✗ One tooth area | ✓ Yes |
| Airway assessment | ✓ Yes | ✗ No | ✗ No | ✓ Yes |
| Best for root detail | ✓ 3D root anatomy | ~ Overlapping roots | ✓ Best 2D detail | ~ Less dental detail |
| // RADIATION_AND_DOSE | ||||
| Radiation dose | 40–560 µSv | 15–20 µSv (low) | ~5 µSv (lowest) | 2,000–5,000 µSv |
| Lowest dose option | ✗ Not lowest | 2nd lowest | ✓ Lowest | ✗ Highest |
| // CLINICAL_ROLE | ||||
| Best for | Implants · complex extractions · endo · pathology · surgical planning | Routine overview · wisdom teeth · orthodontic survey | Periapical pathology · root detail · post-op checks | Trauma · tumour · soft tissue (ENT/maxfac) |
CBCT questions
answered directly.
Including the radiation question — which deserves a direct, honest answer rather than dismissal or alarm.
See what your
jaw really looks like.
In three dimensions.
A PKR 1,000 consultation includes OPG X-ray and clinical assessment — Dr. Haris will confirm whether CBCT is indicated for your case and what the 3D data will specifically change in your treatment plan.
