Imaging. By an implant company.

What sets it apart Most dental CBCT brands started as X-ray companies and added implant planning later. Dentium did the opposite — built a successful implant business first, then built imaging designed to feed that workflow. The result is a system where the software's implant library, the protocols, and the FOV presets are all aligned to surgical use from day one. If you're placing implants, the ecosystem tax is low. If you're not, it's still a capable 3-in-1 on its own merits.

§ 01 · Brand heritage

Dentium Co., Ltd. was founded in 2000 in South Korea and is today one of the top three Korean dental implant manufacturers alongside Osstem and Neo. Their SuperLine and Implantium implant systems are deployed in over 70 countries; their Chinese subsidiary (Dentium China) operates out of Guangzhou.

The Rainbow CT — introduced as part of their imaging push — uses the same "For Dentists By Dentists" design philosophy the brand built its implants around: clinically specific, feature-dense, and tightly integrated with the surgical workflow.

Dentium timeline From implants to full-room imaging 2000

established in Seoul, South Korea — implant-first, R&D driven. 2005 SuperLine implant system launched — becomes one of the best-selling Korean implant platforms. 2010s Expansion into digital dentistry — scanners, guided-surgery tooling, and in-house CBCT development. Mid-2010s

and

platforms launched — shared chassis, differentiated by cephalometric capability. 2026 Platform remains in active Dentium catalogue — firmware, software and parts support continues globally with a strong Chinese-market footprint.

§ 02 · FOV Catalogue

Rainbow CT's FOV catalogue is deliberately short — three clinically distinct modes instead of twenty quasi-overlapping ones. Each mode has clear rules for when to use it and which voxel setting to pick. The headline number is the Stitching mode: at 16 × 18 cm, this is one of the largest effective FOVs available on any dental CBCT, stitched from two sequential scans.

5 × 5 Local · endo Scan time20 s Voxel (High Res)200 μm SelectionsMax / Occ / Mand Typical doseLowest Single tooth, root canal morphology, peri-apical pathology, single implant, periodontal assessment. Choose maxillary, occlusal or mandibular region at the console.

16 × 10 Standard · dual arches Scan time (Fast / Std)10 / 20 s Voxel (Std / HighRes)300 / 200 μm RegionDual arches + TMJs Typical doseModerate Both arches back to the third molars plus bilateral TMJs in a single volume — surgical guide export, simultaneous TMJ diagnosis, full implant cases.

Biggest in class 16 × 18 Stitching · maxillofacial Scan time (Fast / Std)20 / 40 s Voxel300 μm Stitch increment+8 cm height Typical doseHigher Stitched from two sequential scans — maxillofacial and ENT work, airway assessment, skull-base pathology, complex orthognathic planning. Vertical coverage exceeds Papaya, Implagraphy and CS 9300.

Vertical FOV coverage vs category Rainbow CT (stitched) 16 × 18 cm Papaya 3D Plus (max) 16 × 14 cm Rainbow CT (standard) 16 × 10 cm CS 9300 Select (max) 10 × 10 cm CS 9000 3D 5 × 3.7 cm Vertical height shown (cm); bar width proportional to height coverage. Larger isn't always better — dose scales with volume and clinical question should dictate FOV choice.

§ 03 · Two configurations

Dentium sells the Rainbow CT platform in two factory configurations: 3-in-1 (rainbow CT, serial code DX) and 2-in-1 (bright CT, serial code BC). Same chassis, same generator, same CT/pan detector — the difference is cephalometric capability, and there is no onsite upgrade path.

Flagship · DX rainbow CT · 3-in-1 This page

Full 3-in-1 imaging suite. Dedicated cephalometric arm extending laterally from the main column with its own CdTe CMOS detector. Supports Lateral, PA/AP, SMV and Carpus projections.

• ✓CBCT (3 FOVs)
• ✓Digital Panoramic (5 protocols)
• ✓Cephalometric — Lateral, PA, SMV, Carpus
• ✓Two independent detectors (CT+Pan CMOS + Ceph CdTe CMOS)

Footprint1,925 × 1,460 mm Serial codeDX FOB price$32 – 40 K

Compact · BC bright CT · 2-in-1 Also stocked

Same CBCT and panoramic capability as the 3-in-1 — just without the cephalometric arm. Significantly smaller footprint (almost half the width) and lower price, suitable for practices that don't do orthodontic cephalograms.

• ✓CBCT (3 FOVs — identical to rainbow)
• ✓Digital Panoramic (identical to rainbow)
• ✗Cephalometric — NOT available, NOT upgradable later
• ✓Single shared CMOS detector (CT+Pan)

Footprint1,050 × 1,460 mm Serial codeBC FOB price$25 – 32 K

per Dentium's factory specification,

— the cephalometric capability is a factory-level configuration, not a field-installable module. If there's any chance you'll want cephalometric imaging in the next 5–7 years, buy the rainbow CT from the start.

§ 04 · Cephalometric detector

Most dental cephalometric sensors are indirect-conversion: X-ray photons hit a scintillator (typically CsI or GOS), which emits visible light, which a photodiode array then reads. That two-step pathway loses spatial information at the scintillator.

The rainbow CT ceph arm uses a Cadmium Telluride (CdTe) CMOS direct-conversion detector. X-ray photons generate electron-hole pairs directly in the semiconductor, skipping the light-emission step entirely. For ceph tracings where fine skeletal landmarks matter, this typically means cleaner edges and better contrast-to-noise ratio per unit dose.

Detector architecture comparison

Conventional ceph Indirect two-stage conversion

1. 1 X-ray → scintillator (CsI / GOS)
2. 2 Scintillator emits light photons
3. 3 Photodiode reads light → signal

Spatial spread at scintillator stage

Rainbow CT CdTe direct conversion Single-stage semiconductor

1. 1 X-ray → CdTe semiconductor
2. 2 Electron-hole pairs generated directly
3. 3 CMOS readout → signal

One step fewer, less spatial spread Pixel size 100 × 100 μm Active area 290 × 6 mm Type Scanning ceph Related tech note: PointNix Point 800S HD uses the same CdTe semiconductor family for their CT sensor. Rainbow CT applies it to the ceph detector — different target modality, same underlying material advantage.

Cephalometric projections supported Lateral 8 s half / 19 s full Standard orthodontic tracing; jaw-bone and teeth positional assessment. PA / AP 6 s Soft-tissue contours, frontal sinus, nasal cavity assessment. SMV 6 s Submento-vertex — mandibular condyle position and skull base visualization. Carpus 6 s Hand-wrist skeletal age — pediatric orthodontic growth assessment.

§ 05 · Workstation + software

Rainbow CT's original factory package includes the imaging unit and the acquisition workstation — an HP Z4 G4 tower with an Intel Xeon CPU, ECC RAM, NVIDIA discrete GPU and Windows 10 Pro, pre-loaded with Dentium's full rainbow software stack. When you buy one of our refurbished units with the original workstation included, you're plug-and-play.

Hardware HP Z4 G4 + EliteDisplay E22 G5 Original factory pairing. Actual workstation inclusion and condition vary by unit — confirmed per quote.

Software rainbow suite — pre-installed rainbow 3D Viewer CBCT volume viewer · MPR · Cross-section · implant planning with Dentium library · VTO/STO simulation rainbow Image Viewer 2D main viewer · panoramic, cephalometric, intraoral film modes · patient image management rainbow 3D Ceph Orthodontic analysis · Steiner, Ricketts, Bolton analyses · Simple tracing · PA and model analysis rainbow DBServer PostgreSQL 9.5 local database for patient records rainbow CT acquisition Image acquisition control interface for the scan console rainbow BackupRestore Database backup & restore utility DICOM 3.0 export for third-party planning tools (coDiagnostiX, SimPlant, Blue Sky Plan, 3Shape Implant Studio, Anatomage InVivo etc.).

§ 06 · Clinical applications

The Rainbow CT was designed with the implant case in mind, and you'll feel that in the planning software. But the three FOV sizes plus full cephalometric make it a general-purpose 3-in-1 that covers endo through maxillofacial without compromise.

01 Recommended FOV · 5 × 5

Single-implant planning

Local mode with high-resolution 200 μm voxel. Dentium implant library pre-loaded in the 3D Viewer lets you drop-and-position virtual implants with live bone density mapping before surgery.

02 Recommended FOV · 16 × 10

Full-arch implant & surgical guide

Dual arches back to the third molars in one volume — multi-site edentulous or partially edentulous cases, all-on-4 / all-on-6 planning, and DICOM export for CAD/CAM guide fabrication.

03 Recommended · 16 × 10 + Ceph

Orthodontic workup

Full-arch 3D plus a lateral cephalogram on the premium CdTe detector — Simple Tracing, Steiner, Ricketts, Bolton, and PA analyses built in. VTO/STO surgical prediction available for surgical-ortho cases.

04 Recommended FOV · 16 × 18

Maxillofacial & ENT

Stitching mode extends vertical coverage by 8 cm over Standard — reaches the skull base, airway, frontal sinus and full orthognathic planning geometry without referral to a medical CT.

05 Recommended FOV · 16 × 10

Simultaneous TMJ diagnosis

Standard 16 × 10 covers both TMJs in one scan — condylar position, articular surface morphology, and internal derangement signs visible bilaterally without patient repositioning.

06 Recommended FOV · 5 × 5

Endodontic & periodontal

Maxillary, occlusion or mandibular region selection lets you target the Local FOV precisely — root canal morphology, peri-apical pathology, vertical root fractures and periodontal bone levels.

§ 07 · Stocked & ready

We stock both rainbow CT (3-in-1) and bright CT (2-in-1) configurations. Photos on request include full unit shots, serial number verification, and tube-hour report.

Unit installed · with UPS backup Operational radiology room · standby LED illuminated Factory export crates · 3 boxes per unit · 350 kg gross total Want a full photo set, serial number photo, or tube-hour report? We'll send current stock photos and the decoded serial within one working day.

§ 08 · Full specifications

Section A

X-ray generator & tube

Section B

3D cone-beam CT

Section C

Panoramic modality

Section D

Cephalometric modality

Section E

Physical / mechanical & shipping

Section F

Compliance & certifications

CE marking CE 0543 · Class IIb Medical Devices Directive 93/42/EEC as amended by 2007/47/EC IEC / EN / UL 60601-1, 60601-1-1, 60601-1-2, 60601-1-3, 60601-2-7, 60601-2-28, 60601-2-32, 60601-2-44 ISO ISO 9001 · ISO 13485 Quality & medical device QMS

§ 09 · Our refurb process

Every system we ship — rainbow CT, bright CT, or anything else in the catalogue — goes through the same five-stage protocol at our Shanghai facility. No shortcuts.

01 Inspection

Serial decoded (L-DD-DX-D-NN-YY), tube-hour count recorded, functional testing across all three modalities, chassis and movement assessment.

02 Deep service

Detector clean, cable harness inspection, consumables replacement (chin rests, bite blocks), firmware verification (rainbowCT M & S boards).

03 Calibration

Panoramic geometry calibration, CBCT geometric alignment across all three FOVs, cephalometric magnification verification, dose output checks.

04 Test scans

Phantom scans: 5×5, 16×10, 16×18 stitched; panoramic; ceph (where applicable) — exported as DICOM for customer review.

05 Packaging

Three-crate export packing (matches factory: Base, Body+WS, Ceph accessories). ISPM 15 plywood, 350 kg gross, full documentation pack.

§ 10 · Frequently asked Who is Dentium and why are they making dental CBCT? +

Dentium Co., Ltd. is a South Korean dental manufacturer established in 2000, primarily known as one of Asia's leading dental implant brands alongside Osstem and Neo. Their SuperLine and Implantium implant systems are deployed in 70+ countries, and they have a strong Chinese-market presence via Dentium China (Guangzhou subsidiary).

The Rainbow CT is their in-house imaging platform — built specifically to integrate with the implant workflow, including a Dentium implant library inside the 3D Viewer for pre-surgical planning. For practices already placing Dentium implants, the ecosystem integration is material; for other practices, the Rainbow CT still stands on its own as a full-featured 3-in-1 system.

What's the difference between rainbow CT and bright CT? +

Same chassis, same generator, same CT/panoramic detector. The difference is cephalometric capability:

• rainbow CT (serial code DX) — 3-in-1: includes the cephalometric arm and its dedicated CdTe CMOS detector. Supports Lateral, PA/AP, SMV, Carpus. $32–40 K.
• bright CT (serial code BC) — 2-in-1: CBCT + panoramic only, no ceph arm. Nearly half the footprint. $25–32 K.

Important: bright CT cannot be upgraded to rainbow CT onsite after purchase. If you want ceph capability, buy the rainbow CT from the start.

How does Rainbow CT compare to the Genoray Papaya 3D Plus? +

Both are Korean 3-in-1 flagships in a similar price range, but they make different trade-offs:

• Papaya 3D Plus — 19 selectable FOVs up to 16×14 cm, three dedicated sensors (one per modality), finer FOV granularity and fewer per-modality compromises.
• Rainbow CT — 3 FOVs but reaches a larger maximum (16×18 cm via stitching, biggest in class), shared CMOS for CT + pan, premium CdTe direct-conversion ceph, and bundled HP Z4 workstation.

Buy Papaya for FOV granularity and independent per-modality sensor architecture. Buy Rainbow CT for the biggest stitched FOV, implant-workflow integration with Dentium's library, and the bundled workstation.

Why does the CdTe CMOS ceph sensor matter? +

Conventional dental X-ray detectors use a two-step conversion: X-rays hit a scintillator that emits visible light, which is then detected by a photodiode. CdTe (Cadmium Telluride) is a direct-conversion semiconductor — X-ray photons are converted to electrical signal in one step, skipping the intermediate light conversion.

In theory: less scatter at the scintillator stage, higher contrast-to-noise ratio per unit dose, cleaner edges on bony landmarks. In practice on dental ceph, the difference is most visible in fine skeletal detail during orthodontic tracing.

This is the same material family that PointNix uses for their CT sensor — Dentium applied it on the ceph side instead.

Is the HP Z4 workstation always included with the pre-owned unit? +

The original factory package includes a matched HP Z4 G4 tower with Intel Xeon W-2223, 16 GB ECC RAM, NVIDIA RTX 3050 8 GB, 1 TB HDD, Windows 10 Pro, plus an HP EliteDisplay E22 G5 monitor, pre-loaded with the full rainbow software suite.

Because we source pre-owned units, workstation availability varies per unit:

• Some arrive with the original Z4 fully functional — the best case, truly plug-and-play
• Some arrive without it (previous owner kept it, swapped it, or it failed)
• Some arrive with a compatible replacement PC the previous owner installed

We confirm the exact workstation status and software licence situation when we quote. If a unit arrives without a compatible workstation, we can supply one separately at cost.

What software is included and does it plan implants? +

Every unit ships with the full rainbow software suite: rainbow 3D Viewer (CBCT viewer with MPR, Cross-section and implant planning), rainbow Image Viewer (2D main viewer for pano/ceph/intraoral), rainbow 3D Ceph (orthodontic analysis — Steiner, Ricketts, Bolton, PA, Simple Tracing, VTO/STO), rainbow DBServer (PostgreSQL 9.5 local patient database), rainbow CT (acquisition interface) and rainbow BackupRestore.

Implant planning is built in via the rainbow 3D Viewer's Implant Info module, which includes Dentium's own implant library (Implantium, SuperLine, NRLine) for direct virtual placement with live bone-density mapping.

DICOM 3.0 export lets you take the volume into third-party planning tools (coDiagnostiX, SimPlant, Blue Sky Plan, 3Shape Implant Studio, Anatomage InVivo) for non-Dentium implant systems or advanced workflows.

What PC do I need if the workstation isn't included? +

If the unit ships without the original Z4, target something matching the factory spec or better:

• Intel Xeon W-series or equivalent Core i7/i9 / AMD Ryzen 7/9, 6+ cores
• 16 GB RAM minimum (32 GB recommended for Stitching mode reconstructions)
• NVIDIA discrete GPU with 4 GB+ VRAM (RTX 3050 or better)
• 1 TB HDD for C: (software) + 2 TB HDD for D: (image storage)
• Windows 10 or 11 Professional (64-bit)
• RS232 and Ethernet ports for control connection

We can supply a pre-configured acquisition PC on request, or help spec one to local procurement.

Is Dentium still supporting the Rainbow CT in 2026? +

Yes — the Rainbow CT platform remains in Dentium's active imaging catalogue and is actively sold, serviced and supported globally. Parts, firmware updates and software updates continue through Dentium's dealer network. Dentium's strong Korean-market and Chinese-market presence (via Dentium China, Guangzhou) means parts availability and local service coverage are particularly robust in Asia. For Western markets, parts are routinely available through authorised Dentium distributors.

What's included, and what's the warranty? +

Every shipment includes:

• CBCT unit (rainbow CT 3-in-1 or bright CT 2-in-1, as ordered), fully assembled and calibrated
• HP Z4 G4 workstation + EliteDisplay E22 G5 monitor (subject to availability — confirmed per quote)
• Complete rainbow software suite pre-installed
• Calibration certificate from our test run
• Export-grade packaging (matches factory 3-crate layout, ISPM 15 certified)
• Commercial invoice, packing list, CE documentation

Warranty: 3-month limited hardware warranty on tube, generator, CMOS detector, CdTe ceph detector (extendable to 6 or 12 months on request). Installation and training videos/support provided remotely.

Not included: site preparation, electrical installation, radiation shielding, local import duties/VAT, customs clearance, inland haulage from destination port.

How does FOB Shanghai shipping work? 3 crates, 350 kg — is that one 20ft container? +

Under FOB Shanghai, we deliver the three crates to the vessel at the Port of Shanghai; ocean freight, insurance and destination handling are your responsibility or your freight forwarder's. Typical routing options:

• LCL (Less than Container Load): often the most cost-effective for 350 kg / 3 crates. 25–40 days to major destinations.
• 20ft FCL: overkill for one unit unless you're consolidating with other equipment or dental supplies — but happy to load mixed containers.
• Air freight: possible but 350 kg air is expensive. Faster if urgent.

We can also quote CIF terms if you'd prefer we handle ocean freight and insurance.