3D DentalIn stock
3D Dental X-Ray Positioning Arms & Aiming Rings · Anterior (Blue)
SKU 100-1120MFR# VXR-A
Part
Aiming Ring
Positioning Arm$8.48
Aiming Ring$7.02
Type
Anterior (Blue)
This 3D Dental Designs And Development Bite Wing X-Ray Positioning Aiming Ring is used for precise alignment and stabilization of X-ray sensors or film during bitewing radiographic procedures. It facilitates accurate image capture by ensuring correct angulation and positioning, which is essential for diagnostic quality.
The aiming ring is supplied in red, indicating its specific application for bitewing imaging. It is designed for interchangeability with existing Rinn and Flow dental positioning systems, and is comparable to XCP / BAI #54-0934. This offers a compatible option for practices utilizing these established imaging product lines.
Product
- Manufacturer
- 3D Dental
- Manufacturer #
- VXR-A
- Item code
- 100-1120
Catalog path
- Marketplace
- Clinical
- Category
- Imaging & X-Ray
- Subcategory
- Sensor Positioners & Holders
Ordering
- Status
- In stock
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Questions
What is it used for?
This 3D Dental Designs And Development Bite Wing X-Ray Positioning Aiming Ring is used for precise alignment and stabilization of X-ray sensors or film during bitewing radiographic procedures.
Which part and type options are on this page?
This page carries 2 part options: Positioning Arm, Aiming Ring. This page carries 3 type options: Anterior (Blue), Bite Wing (Red), Posterior (Yellow). Pick one to see its price, part number and stock.
When does it ship?
In-stock orders placed before 3 PM ET ship the same day; anything not on our shelf ships within 3 business days.Ground shipping is free over $10.
About positioners and aiming devices
These are usually sets rather than single parts: most holders are built as a receptor-holding portion plus a right-angle beam aiming rod, with or without an aiming ring. A ring with notches is what brings a rectangular collimator square to the receptor, with the cone perpendicular to the plate. Aiming rods are made at a right angle for the standard projection, and adjustable rods set to 20 or 40 degrees exist for shifting the tube horizontally.
A holder is what keeps the image receptor still in the mouth: the FDA calls it a dental x-ray film holder, a device intended to position and to hold x-ray film inside the mouth, and lists it as Class I (21 CFR 872.1905). A second section covers the dental x-ray exposure alignment device, intended to position x-ray film and to align the examination site with the x-ray beam. The aiming part at the tube end is a position indicating device — a collimator, cone or aperture that aligns the examination site with the beam and restricts the dimensions of the x-ray field by limiting the size of the primary beam.
FDA and ADA guidance names holders that align the receptor precisely with the collimated beam for periapical and bitewing radiographs, and heat-sterilizable or disposable receptor-holding devices for infection control. Using a receptor-holding device reduces the risk of cone-cutting, where part of the receptor is not exposed because the beam is out of line. Published work describes the paralleling technique as producing the most accurate periapical radiographs for endodontic purposes, and notes that a film-holding device used with it standardises the images.
How positioners and bite blocks differ
- Positioners & Aiming Devices — The arm and ring that aim the beam, which is what makes the paralleling technique repeatable. In one comparison an angulation-adjustable holder produced no cone-cutting error in the horizontal tube-shift technique and cut the time spent aligning the cone, where a fixed right-angle paralleling holder did not.
- Bite Block Positioners — Held in place by the bite, with no aiming arm or ring of its own.
What to look at when choosing a positioner
Receptor size: standard receptor dimensions are 22 by 35 mm for size 0, 24 by 40 mm for size 1, 31 by 41 mm for size 2, 27 by 54 mm for size 3 and 57 by 75 mm for size 4.
Projection: the guidance names holders for periapical and bitewing radiographs, and a holder is matched to the view it is used for.
Collimator shape: a clinical audit reported that rectangular collimation reduces the patient dose on intraoral radiographs by 40 to 92 percent against round collimation, and that no cone-cuts occurred when it was used. For adult intraoral imaging the beam at the end of a rectangular collimator is described as ideally limited to no more than 35 by 45 mm.
Reprocessing: a holder is either heat-sterilizable or disposable.
The cone it works with: guidance states the position indicating device should be open ended and have a metallic lining, to restrict the primary beam and reduce the tissue volume exposed to radiation. A lead-lined position indicator is its own Class I device: a cone-shaped device lined with lead, attached to the tube, that absorbs divergent radiation and prevents leakage.
Sources: FDA 21 CFR 872.1905, Dental x-ray film holder · FDA 21 CFR 872.1820, Dental x-ray exposure alignment device · FDA 21 CFR 872.1840, Dental x-ray position indicating device · FDA and ADA: The Selection of Patients for Dental Radiographic Examinations (revised 2012) · Efficacy of a newly designed angulation-adjustable film holder for reducing cone-cutting errors in the horizontal tube-shift technique, 2022 (PMC9668518) · Impact of Rectangular Collimation on Quality of Intraoral Radiographs: Findings from a Clinical Audit at a Dental Practice, 2025 (PMC11988990) · Sampaio-Oliveira et al. 2025, Intraoral digital radiography: a comprehensive report on the technical specifications of current and historical systems (Imaging Sci Dent) · FDA 21 CFR 872.1850, Lead-lined position indicator
