Home' News Bulletin : ADA News Bulletin August 2015 Contents 46
seizures following cannabis administration.
Their initiative will bring together three
leading researchers who believe that
cannabis is the next frontier for medical
discovery and a potential treatment for
obesity, schizophrenia and drug addiction,
in addition to its already established use
for chronic pain relief.
The donor, Barry Lambert, who is BRW
rich-listed, made his money in financial
planning and was inspired to make the
donation primarily because his grand-
daughter Katelyn was having hundreds
of epileptic seizures per day, which were
relieved by cannabis-based medicine.
Researchers believe that about ten of its
roughly 100 compounds are sufficiently
well-known for clinical trials to be
conducted for a wide variety of potential
We urge you to share your favourite hints
with your colleagues. Note that readers
cannot tell which hint is yours, thus
forestalling any teasing. All hints, excellent
or less so, are eventually printed, so send
Some patients with mandibular complete
dentures can experience pain if their
denture presses on the mandibular nerve.
This occurs because long-term ridge
resorption can re-position the mental
foramen so that the denture base presses
on it. The foramen can usually be palpated
digitally to elicit the pain, but a disclosing
paste will not show its location. When
you have located the foramen, paint the
area using a bright, caries-indicating dye
on a microbrush. Then seat the denture
to transfer the dye, which now indicates
the area which requires relieving. In
the days before strict infection control,
indelible pencils were used instead of dyes.
Perhaps they still are, but they must be
re-sharpened after every use, as a form of
When mixing alginate for U and L
impressions, adjust the temperature of
the mixing water to the recommended
value, mix the correct amounts of
water and powder, load and insert the
mandibular tray, and have the patient or
nurse hold it in place. The mandibular
impression seldom causes a gag problem,
and also conditions the patient to the
impression procedure. Leave it in place and
immediately take the maxillary impression.
Remove it as soon as the alginate sets.
This quick removal reduces the chance of a
gag reflex. You will probably find that this
procedure also saves time.
After root-filling a weak tooth, some
patients are reluctant to accept a crown.
The alternative direct restoration should
Retired dentist Brian Duncan (Roseville
2069) has been your Columnist's friend
and colleague for more than six decades.
But he still uses his manual skills to
good effect at his local 'Men's Shed',
where he came across the item pictured.
A number of people were unable to
identify it, so it is this month's TEASER.
But simply saying what it is will not win
the handsome, inscribed, antique metal
ADA paperweight. Responses which
FULLY explain its use will take preference.
As usual, the appropriate answers will
go on slips in the hat, with an extra slip
for each accompanying Clinical Hint.
Margaret will then select the winner.
Your Scholiast was delighted that ALL
responses to the April, 2015 TEASER
were accompanied by one or more
clinical hints. Your Compiler hopes this is
a harbinger of future responses, and not
a once only event.
No reader has, to date, responded
to the recent request for words
of wisdom, comments on the
current plethora of promotions for
educational courses or making apposite
observations about our honourable
profession. Please do so when the
mood is upon you.
Your Emendator has been severely
underwhelmed by Clinical Hints
from orthodontists, oral surgeons,
periodontists, chairside assistants and
hygienists. We know you are out there.
Please send them forthwith to:
Barrie Gillings, Phone: 02 9144 3787,
e-mail: email@example.com, or Australia
Post mail to 121 Bannockburn Rd,
This issue's hinters were : A Dent
(an alias), H Hocking, M Knapp and
then be designed to minimise the
possibility of a subsequent fractured root
or crown. So prepare a post or posts for
the one or two roots, of a length just short
of the occlusal plane, and cement them
in place using resin-modified GIC. Now if
the restoration fails, you have a post or
posts which are sufficiently substantial to
support the core for a full crown.
This hinter has had problems with the
'foot' of his injection syringes 'unwinding'
and becoming loose on the shaft. His
nurse, whose fiancée was a plumber,
suggested winding a small piece of Teflon
plumbers tape around the threaded
part of the shaft onto which the 'foot'
was screwed. This apparently solved the
'unwinding' problem. Another approach
might be to use 'Loctite' 609 or similar
anaerobic cure resin to prevent the
unwinding. Just follow the instructions
on the bottle.
When removing a faulty porcelain veneer
from an anterior tooth, it is sometimes
difficult to tell the difference between
tooth substance and porcelain, particularly
when the luting cement is thin. Apply
some conditioning fluid to the tooth
surface, leave it on for a few seconds, then
rinse off and dry the surface. The enamel
will be etched more than the porcelain and
thus differentiate the two.
Sodium bicarbonate cleaning jets (e.g.
Dentsply, Prophy Jet) are excellent for
removing tea and tobacco staining, but
they clog easily, and the blockage can be
so hard that fine wires will not clear the
nozzles. Use a disposable syringe to inject
a little chloroform into the metal tubing,
then use a fine endodontic reamer to clear
the obstruction. To prevent blockages, it
is important to ensure that the tubing is
dry before use. Sterilising cycles do not
always dry out tubing completely, so
blow air through the nozzle before use to
clear out any moisture. To reduce any loss
of air pressure, improve the seal of the
handpiece connection by putting a little
silicone gel around the rubber washer.
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