Surgical Solutions - March-May 2017 - 11

ANAESTHESIA DELIVERY

Two NEW and Highly Effective
Injection Techniques
By Eugene R. Casagrande, DDS, Director of International
& Professional Relations, Milestone Scientific

The STA Injection System (Figures 1 and 2) is not only great for single tooth anaesthesia, but it is also very useful to administer
multiple-tooth injections such as the P-ASA. The P-ASA is a single-site palatal injection that can anesthetise 6 anterior teeth
and the related labial and palatal gingival tissues (Figure 3) without causing collateral numbness to patients' upper lip and
face. They really appreciate this! This easy-to- administer injection can take the place of at least 4 buccal infiltrations and a
palatal injection, and it is valuable for cosmetic restorative dentistry procedures such as composites, veneers, and crowns
because you can immediately assess the patient's smile line. The P-ASA is also useful for endodontic, periodontal, and implant
procedures.

The P-ASA is a very comfortable injection for your patients due to the STA flow rate
below the patient's pain threshold and the ability to easily control the needle.
anaesthetic depends on manual pressure (which will vary from
person to person). The STA-II is easy to administer
since you glide the bevel of the needle in the sulcus down the
root of the tooth until resistance is met (Figure 4). The flow rate
is computer-controlled, consistent, and below the patient's pain
threshold. The dentist receives confirmation of a precise injection
site as the STA System communicates back using lights and
soft tones.

The STA Intraligamentary Injection Versus the PD
There are major differences that should be considered between
the traditional PDL injection delivered with the syringe or the
Ligmaject and the STA-administered intraligamentary injection
(STA-II).
1. The PDL is usually the injection of last resort, when the
mandibular block fails. The STA-II should be considered the
primary injection for any maxillary or mandibular tooth, and it
can replace mandibular blocks and infiltrations, which cause
collateral numbness to the patient's lip, face, and tongue.
2. When a traditional PDL injection is performed with a
traditional syringe, a small amount of anaesthetic is injected
under excessive pressure, which produces a short duration of
anaesthesia. The STA-II delivers a larger volume of anaesthetic
under minimal pressure, resulting in longer duration (40 minutes).
3. The PDL injection is difficult to administer since the tissue in
this area is quite dense, and the flow rate of the

4. The PDL injection has been known to be painful on delivery
and often results in tissue damage and bone resorption,
resulting in postoperative discomfort. The STA-II is a comfortable
injection, and clinical studies shows it causes no tissue damage
or bone resorption and little or no postop discomfort.
5. The STA, using Dynamic Pressure Sensing, allows you to
know when you have arrived at the correct site (the periodontal
ligament space) for a successful intraligamentary injection; it
also indicates if you have left the site and if the needle has been
blocked by obstruction or pressure.

For more information contact your Territory Manager
SOURCE: Dentistrytoday.com

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Table of Contents for the Digital Edition of Surgical Solutions - March-May 2017