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Certified Pre-Owned · Korean Heritage
登腾 · rainbow CT · 彩虹CT

Imaging.
By an implant company.

The Dentium Rainbow CT is a 3-in-1 dental CBCT from one of Korea's leading dental implant manufacturers — built so the scanner, the planning software and the implants speak the same language. Three FOVs up to 16 × 18 cm stitched, a premium CdTe direct-conversion cephalometric sensor, and a bundled HP Z4 workstation pre-loaded with the full rainbow software suite.

Max stitched FOV
16 × 18 cm
Biggest in class
Ceph detector
CdTe CMOS
Direct-conversion, 100 μm
Bundled with
HP Z4 G4
Xeon + RTX 3050 + Win 10 Pro
Request FOB Quote Full specifications
Dentium Rainbow CT dental CBCT unit — full installed view showing the main imaging arm with panoramic and CBCT detector housing, dedicated cephalometric arm on the left with two head-stabilizer pillars, lime-green Dentium accent on the column and signature green status LED illuminated for standby
rainbow CT · 3-in-1 installed
Dentium · Seoul, Korea
韩国登腾
What sets it apart

An imaging product from an implant company.

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

Seoul. Since 2000.

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
Dentium 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
rainbow CT (3-in-1) and bright CT (2-in-1) 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

Three fields. One stitches to 16 × 18.

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

rainbow CT or bright CT. Not both, not later.

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)
Footprint
1,925 × 1,460 mm
Serial code
DX
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)
Footprint
1,050 × 1,460 mm
Serial code
BC
FOB price
$25 – 32 K
Important: per Dentium's factory specification, onsite upgrade of bright CT to rainbow CT is not supported — 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

CdTe CMOS. Direct conversion.

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

Bundled HP Z4. Pre-loaded rainbow suite.

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
ManufacturerHP
ModelZ4 G4 Workstation
CPUIntel Xeon W-2223
RAM16 GB DDR4-2933 Reg ECC
HDD1 TB 3.5" HDD
GPUNVIDIA GeForce RTX 3050 8 GB
EthernetIntel I210 T1 LAN + Serial
OSWindows 10 Professional
MonitorHP EliteDisplay E22 G5 · 21.5" FHD
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

Implant-first. Broader still.

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.

§ 08 · Full specifications

Complete technical datasheet.

Section A

X-ray generator & tube

Tube voltage60 – 100 kVp ± 3% (1 kV step)
Tube current4 – 12 mA ± 3% (0.1 mA step)
Focal spot0.5 mm
Target angle12°
Anode heat capacity30 kJ
Inherent filtration1.0 mm Al
Tube (housing / insert)POSKOM / Toshiba
Rated output2.0 – 2.2 kVA
Input power110 – 240 V, 50 / 60 Hz
Section B

3D cone-beam CT

Detector typeCMOS (shared with Pan)
Detector modelC12820DK-40
CBCT pixel size240 × 240 μm
FOVs5×5, 16×10, 16×18 (stitched) cm
Voxel — Std / HighRes300 μm / 200 μm
Scan time (Normal)10 s (Fast) / 20 s (Std, HighRes)
Scan time (Stitching)20 s (Fast) / 40 s (Std, HighRes)
Magnification1.53:1 (FDD 600 mm)
System default94 kVp / 8 mA · 20 s · Standard
Section C

Panoramic modality

Detector typeCMOS (shared with CBCT)
Panoramic pixel size120 × 120 μm
ProgramsStandard · Incisor · Bitewing · Sinus · TMJ
Scan time (Standard, adult)19 s
Scan time (Incisor)7 – 8 s
Scan time (Sinus / TMJ)12 s / 8.5 – 9 s
Exposure71 – 90 kVp / 10 mA (patient-size adaptive)
Magnification1.35:1 (FDD 600 mm)
Section D

Cephalometric modality

Detector typeCdTe CMOS (direct-conversion, dedicated)
Detector modelC10502D-43
Pixel size100 × 100 μm
Active area290 × 6 mm (scanning)
Scan time — Lateral8 s (Half, default) · 19 s (Full, optional)
Scan time — PA / SMV / Carpus6 s
ROI24 × 29 cm
Exposure88 – 95 kVp / 10 mA (patient-size adaptive)
Magnification1.14:1 (FDD 1,745 mm)
Section E

Physical / mechanical & shipping

Dimensions (3-in-1)1,925 × 1,460 × 2,270 mm
Dimensions (2-in-1)1,050 × 1,460 × 2,270 mm
Lift column travel1,570 – 2,270 mm
Main baseFloor-stand (no wall-mount)
Shipping crate count3 crates (Base / Body+WS / Ceph acc.)
Total net weight244 kg (538 lb)
Total gross weight350 kg (772 lb)
Largest crate1,760 × 720 × 1,408 mm · 230 kg
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

Five stages. Every unit.

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

Buyer's questions.

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.

Contact

Two ways to reach us. Either works.

We run on WhatsApp and email — no forms, no lead-gen funnels. Messages hit our sales team directly and we respond within one working day.

WhatsApp
+86 159 5127 6160
Fastest — usually answered within an hour during Shanghai business hours.
Open WhatsApp chat
Email
[email protected]
For detailed specs, quotes, and documentation. We reply within one working day.
Compose email
Company
Shanghai Carejoy Dental Co., Ltd.
上海嘉智医疗器械有限公司
Trade terms
FOB Shanghai · CIF / CIP on request
Payment: 30% T/T deposit, 70% before shipment
Business hours
Mon–Sat · 09:00 – 18:00 (GMT+8)
Response within 24h on enquiries