Bone and dental forensic specimen Grinder

The MSW-Forensic-D300 Dental Grinder is a specialized forensic instrument designed for DNA extraction from human teeth in laboratory settings. This device utilizes low-speed rotational grinding technology that minimizes heat generation and noise while ensuring efficient processing. The closed-system disposable grinding chambers prevent environmental contamination and cross-sample interference, making it particularly valuable for forensic applications where sample integrity is crucial.

This innovative equipment finds applications across multiple scientific disciplines including genomic research, forensic identification, and dental implant procedures using autogenous tooth powder. Its operational principle involves a unique dual-grinding head mechanism where one rotating head works against a stationary counterpart to apply combined compressive and shearing forces. This action effectively reduces teeth to fine powder within a completely enclosed environment, eliminating the risks associated with traditional open grinding methods while maintaining optimal conditions for subsequent DNA analysis.

When compared to conventional tooth fragmentation methods, the MSW-Forensic-D300 demonstrates significant technological improvements. Traditional hammer-based crushing techniques, while inexpensive, generate substantial noise and uncontrollable particulate dispersion. Cryogenic grinders, though versatile for various tissue types, require complex liquid nitrogen pretreatment and extended processing times. The dental grinder addresses these limitations by operating at ambient temperatures with single-use cartridges that ensure both operator safety and sample purity throughout the grinding procedure.

The instrument's design prioritizes forensic workflow efficiency through several key features. Integrated barcode scanning enables sample tracking, while the system's modular architecture permits customization of data output formats for laboratory information management systems. Although specifically optimized for dental and small osseous materials, its rapid processing capability - typically completing grinding cycles within minutes - makes it particularly suitable for high-throughput forensic laboratories where chain-of-custody documentation and processing speed are equally critical.

Engineered for precision forensic work, the dental grinder incorporates multiple safeguards to maintain evidentiary integrity. The temperature-controlled grinding process preserves DNA quality by preventing thermal degradation, while the sound-dampened operation allows for use in shared laboratory environments. Each disposable grinding cartridge contains the entire sample throughout processing, eliminating transfer steps that could potentially compromise evidentiary materials or create contamination risks between cases.

Advanced operational interfaces provide both simplicity for routine use and configurability for specialized applications. The system's intelligent controls automatically adjust grinding parameters based on material hardness, with process data logging capabilities that support quality assurance protocols. Optional connectivity packages enable integration with laboratory information management systems, though these enhanced data management features require specific configuration during procurement to meet individual laboratory requirements and evidentiary standards.

Performance Indicators

Environmental Requirements

• Temperature: -10℃ to 45℃

• Relative humidity: ≤ 70%

• Power supply: AC 220V±22V 50Hz±1Hz

• Input power: 300VA

• Atmospheric pressure: 86.0kPa to 106.0kPa

• Others: Avoid dust, direct sunlight, liquid splashes, corrosive gases, vibration and strong electromagnetic interference

Technical Specifications

• Chinese operating software

• Grinding speed: 120~200 seconds/sample

• Temperature rise during grinding: less than 20℃

• Tooth DNA detection rate: 100%

• Disposable tooth grinding box

• Barcode scanning for information input

• Interfaces: USB, Ethernet port, 10-inch touch LCD screen

Instrument Weight

• Dimensions (mm): 412×390×220 (L×W×H)

• Weight (Kg): 21

Installation and Setup

Prior to installation and setup, carefully review all safety precautions and operational guidelines. The instrument requires careful handling during unpacking due to its precision components and forensic-grade construction specifications.

Inspect the external packaging thoroughly before opening for any signs of damage, impact marks, or water exposure. Should any shipping damage be detected, immediately contact the transportation provider or authorized dealer before proceeding with unpacking. The instrument's forensic applications demand strict chain-of-custody documentation for both the equipment and its components.

Remove all protective packaging materials cautiously, ensuring the main unit is lifted properly to prevent impact damage or accidental drops. Position the instrument on a stable laboratory surface that meets the specified environmental conditions. Verify all components against the packing list, examining each item for potential transit damage that might affect forensic validity.

Connect the power supply to an appropriate electrical outlet meeting the specified voltage requirements. Upon power activation, the system will initiate automatic diagnostic checks before displaying the operational interface. The initialization process typically completes within one minute, after which the instrument is ready for calibration and operational verification according to forensic laboratory protocols.

Operating Instructions

Pre-Operation Preparation

Before initiating the grinding process, carefully inspect the disposable dental grinding cartridge. Examine the grinding heads to ensure proper alignment with the cartridge surface. If any protrusion is detected, manually press the grinding head until it becomes flush with the port surface. This critical step ensures proper mechanical engagement during the grinding sequence and prevents potential equipment damage.

Remove the protective seal from the cartridge and insert the dental specimen through the designated loading window. Securely replace the sealing sleeve to create a contamination-proof environment. For forensic tracking purposes, apply identification labels at this stage if required by your laboratory's chain-of-custody procedures. The complete enclosure system maintains evidentiary integrity throughout the grinding process.

Operational Procedure

Power on the instrument and wait for the operational interface to initialize. The system performs automatic diagnostics before becoming operational. Never attempt to start the grinding program without both the cartridge properly installed and a dental specimen loaded, as this may damage the grinding mechanism and void the equipment warranty.

Initiate the loading sequence by selecting the [Eject] command, which extends the transport mechanism. Place the prepared cartridge onto the loading platform with the sealed end facing inward and alignment holes downward. Ensure proper orientation by checking the cartridge sits flush against the left and front guides. Engage the [Retract] command to safely position the cartridge within the grinding chamber. The system automatically verifies proper loading before permitting operation.

Grinding Process Control

The default grinding duration is set to 150 seconds, optimized for average dental specimens. Experienced operators may adjust this parameter between 120-200 seconds through the touchscreen interface to accommodate specimen variations. The system enforces a minimum 75-second safety threshold and automatically reverts to default settings after power cycles, ensuring consistent baseline operation.

During active grinding, the interface displays a countdown timer and automatically converts the [Start] prompt to [Stop] for process control. The closed-loop temperature management system maintains the grinding process within a 20°C temperature rise threshold, preserving DNA integrity. Upon completion, the system returns to standby mode and prompts for cartridge ejection.

Data Management System

The integrated data logger maintains approximately 4,000-5,000 process records in chronological order, automatically purging older entries when capacity is reached. Forensic laboratories can export complete datasets via USB interface, with automatic filename generation including timestamps for evidentiary documentation. The system generates Excel-compatible files, though users should adjust numeric formatting for proper barcode display when working with purely numerical identifiers.

Advanced system configurations are protected by password authentication, restricting access to authorized personnel. The maintenance menu provides qualified technicians with tools for coordinate calibration and procedural adjustments. Regular operators should only access basic functions through the standard grinding interface to prevent accidental parameter changes.

Post-Processing Protocol

After grinding completion, carefully remove the cartridge and transfer the dental powder to designated collection tubes using the integrated pouring spout. The disposable cartridge design eliminates cross-contamination risks between specimens. For continuous operation, simply repeat the loading sequence. Conclude work sessions by properly retracting the transport mechanism and powering down the unit according to the prescribed shutdown procedure.

Maintenance and Care

Keep the instrument clean and turn off the power switch after use.