Page 16 - My FlipBook

8 CAUSES AND RELIEF OP DENTAL PAIN.

Acute localised dental periostitis.—Causes : (1) Inflam-
mation spreading from a living inflamed pulp, through

the apical foramen to the periosteum immediately sur-
rounding it.
(2) Direct absorption by the periosteum of septic
material from a putrefying pulp.

Stopping an imperfectly sterilised tooth from
(3)
which septic material is unable to escape, except through
the apical foramen.
Injury caused by a blow upon the tooth, injuring
(4)
and perhaps leading to infection of the periosteum.
(5) The escape of arsenic from a dressing applied for
the destruction of a dental pulp.

(6) Exposure and infection of the periosteum super-
vening in the condition known as pyorrhoea alveolaris
(Riggs' disease).
Symptoms.—In the early stages the tooth or teeth may
later, however,
be merely tender and uncomfortable ;
owing to the swelling of the dental periosteum the affected
teeth become raised, as well as loose and tender to the
slightest touch.
The gums also become involved, since the dental

periosteum is reflected outwards at the margin of the
alveolus, and become swollen and deeply congested,
presenting a velvety feeling when touched by the finger.
Sudden changes of temperature or weather will often

bring on or accentuate an attack of dental periostitis in
those subject to this affection.
When dental periostitis is produced by mercury or

phosphorus, there is tenderness and loosening of the
teeth, extreme congestion of the gums, which become
spongy and readily bleed, together with great oral fcetor.
Ulceration with sloughing of the gums and necrosis of
the jaw may ensue.