Position Paper Periodontal Diseases of Children and Adolescents*
This paper was prepared by the Research, Science and Therapy Committee of the American Academy ofPeriodontology and is intended for the information of the dental profession and the public. It represents a briefsummary of the current state of knowledge about periodontal diseases in children and adolescents. J Peri-odontol 2003;74:1696-1704.
Epidemiologic studies indicate that gingivitis of the microbiology of this disease has not been com-
varying severity is nearly universal in children
pletely characterized, increased subgingival levels of
and adolescents.1-19 These studies also indicate
Actinomyces sp., Capnocytophaga sp., Leptotrichia sp.,
that the prevalence of destructive forms of periodon-
and Selenomonas sp. have been found in experimen-
tal disease is lower in young individuals than in adults.
tal gingivitis in children when compared to gingivitis in
Epidemiologic surveys in young individuals have been
adults. These species may therefore be important in its
performed in many parts of the world and among
individuals with a widely varied background. For the
Normal and abnormal fluctuation in hormone lev-
most part, these surveys indicated that loss of peri-
els, including changes in gonadotrophic hormone lev-
odontal attachment and supporting bone is relatively
els during the onset of puberty, can modify the
uncommon in the young but that the incidence
gingival inflammatory response to dental plaque.28,29
increases in adolescents aged 12 to 17 when com-
Similarly, alterations in insulin levels in patients with
pared to children aged 5 to 11.15-22 In general, in the
diabetes can affect gingival health.28,29 In both situ-
United States, epidemiologic studies indicate that the
ations, there is an increased inflammatory response
prevalence of severe attachment loss on multiple teeth
to plaque.28,29 However, the gingival condition usually
among children and young adults is approximately0.2% to 0.5%.23 Despite this low prevalence, children
responds to thorough removal of bacterial deposits
and adolescents should receive periodic periodontal
evaluation as a component of routine dental visits.
On October 30-November 2, 1999, the American
PERIODONTITIS
Academy of Periodontology assembled an International
Aggressive Periodontitis, Chronic Periodontitis,
Workshop for a Classification of Periodontal Diseases
and Periodontitis as a Manifestation of Systemic
and Conditions, which resulted in a new classification.24
Diseases
Periodontal diseases discussed here will reflect the new
Children and adolescents can have any of the several
classification system. Clinically distinct periodontal
forms of periodontitis as described in the proceedings
infections that can affect young individuals include: 1)
of the 1999 International Workshop for a Classifica-
dental plaque-induced gingival diseases; 2) chronic
tion of Periodontal Diseases and Conditions (aggres-
periodontitis; 3) aggressive periodontitis; 4) periodon-
sive periodontitis, chronic periodontitis, and
titis as a manifestation of systemic diseases; and 5)
periodontitis as a manifestation of systemic diseases).
However, chronic periodontitis is more common inadults, while aggressive periodontitis may be more
DENTAL PLAQUE-INDUCED GINGIVAL DISEASES
The primary features of aggressive periodontitis
Gingivitis Associated with Dental Plaque Only
include a history of rapid attachment and bone loss
and Gingival Diseases Modified by Systemic
with familial aggregation. Secondary features include
Factors Associated with the Endocrine System
phagocyte abnormalities and a hyperresponsive
Gingivitis characterized by the presence of gingival
macrophage phenotype.24 Aggressive periodontitis
inflammation without detectable loss of bone or clini-
can be localized or generalized. Localized aggressive
cal attachment is common in children.1-19,25 Although
periodontitis (LAgP) patients have interproximalattachment loss on at least two permanent first molars
* This paper was developed under the direction of the Research, Science
and incisors, with attachment loss on no more than
and Therapy Committee and approved by the Board of Trustees of theAmerican Academy of Periodontology in August 2003.
two teeth other than first molars and incisors. Gener-
alized aggressive periodontitis (GAgP) patients exhibit
tibility of individuals to LAgP is unknown, but it is
generalized interproximal attachment loss including
possible that they play a role in the clinical course of
at least three teeth that are not first molars and
disease in some patients. Indeed, in some cases
incisors. In young individuals, the onset of these dis-
exhibiting phagocyte abnormalities, neutrophil defects
eases is often circumpubertal. Some investigators
may still be present after treatment.77 Molecular
have found that the localized form appears to be self-
markers of LAgP can include an abnormally low num-
limiting,30 while others suggest that it is not.20 Some
ber of chemoattractant receptors78-81 and an abnor-
patients initially diagnosed as having LAgP were found
mally low amount of another cell surface glycoprotein
to have GAgP or to be periodontally healthy at a 6-
designated GP-110.82,83 Adherence receptors on neu-
trophils and monocytes, such as LFA-1 and Mac-1,
LAgP occurs in children and adolescents without
clinical evidence of systemic disease and is charac-
GAgP, often considered to be a disease of adoles-
terized by the severe loss of alveolar bone around
cents and young adults, can begin at any age and
permanent teeth.31 Frequently, the disease is local-
often affects the entire dentition.84,85 Individuals with
ized to the permanent first molars and incisors. How-
GAgP exhibit marked periodontal inflammation and
ever, some retrospective data obtained from LAgP
have heavy accumulations of plaque and calculus.84
patients suggest that bone loss around the primary
In the United States, the reported prevalence of GAgP
teeth can be an early finding in the disease.33 Link-
in adolescents (14 to 17 years of age) is 0.13%.23
age studies of the Brandywine population (a segre-
Subgingival sites from affected teeth harbor high per-
gated group of people in Maryland that represents a
centages of non-motile, facultatively anaerobic,
relatively closed gene pool) have found a gene con-
Gram-negative rods including Porphyromonas gingi-
ferring increased risk for LAgP on chromosome 4.34
valis.86,87 In one report, the levels of P. gingivalis and
Subsequent linkage studies of African American and
Treponema denticola were significantly higher in GAgP
Caucasian families did not confirm linkage to this
and LAgP patients compared to matched controls,
locus, suggesting that there may be genetic and/or
with GAgP patients having the highest levels.88 Neu-
etiologic heterogeneity for aggressive periodontitis.35-
trophils from patients with GAgP frequently exhibit
37 Reported estimates of the prevalence of LAgP in
suppressed chemotaxis as observed in LAgP77,87 with
geographically diverse adolescent populations range
a concomitant reduction in GP-110. This suggests a
from 0.1% to 15%.23,33-35,37-42 Most reports suggest
relationship between the two variants of aggressive
a low prevalence (0.2%), which is markedly greater
in African American populations (2.5%).
Alterations in immunologic factors such as immuno-
Many reports suggest that patients with LAgP gen-
globulins are known to be present in aggressive peri-
erally form very little supragingival dental plaque or
odontitis. Immunoglobulins appear to be influenced
calculus.31,43 In contrast, other investigators find plaque
by both genetic and environmental factors and have
and calculus at levels similar to other periodontal dis-
important protective disease-limiting effects in aggres-
eases.44,45 Bacteria of probable etiologic importance
sive periodontitis patients.89-93 Human IgG antibody
include highly virulent strains of Actinobacillus actino-
molecules (immunoglobulin G) are categorized into
mycetemcomitans in combination with Bacteroides-
four subclasses designated as IgG1-4. Most of the anti-
like species.46-49 In some populations, Eubacterium
body reactive with A. actinomycetemcomitans is spe-
sp. have been associated with the presence of
cific for high molecular weight lipopolysaccharide and
LAgP.50,51 To date, however, no single species is found
is of the IgG2 subclass. This antibody response appears
to be protective, as early-onset periodontitis patients
A variety of functional defects have been reported
having high concentrations of antibody reactive with
in neutrophils from patients with LAgP.53-55 These
A. actinomycetemcomitans lipopolysaccharide have
include anomalies of chemotaxis,56-58 phagocyto-
significantly less attachment loss (a measure of dis-
sis,59,60 bactericidal activity,61 superoxide produc-
ease severity) than patients who lack this antibody.89,90
tion,62-66 FcγRIIIB (CD16) expression,67 leukotriene
Overall levels of IgG2 in serum are under genetic
B4 generation,68,69 and Ca2+-channel and second
control.91 These levels have also been shown to be
messenger activation.70-75 The defect in chemotaxis
affected by periodontal diagnosis (LAgP patients have
is thought to be an intrinsic defect by some investi-
very high levels), race (African Americans have higher
gators56-58 and an induced defect by others.76 The
levels than Caucasians), and smoking (smokers have
influence of these functional defects on the suscep-
lower levels of IgG2, with notable exceptions in some
Position Paper
patient groups).91,92,94,95 These factors also influence
flora. In GAgP patients who have failed to respond to
specific antibody responses to A. actinomycetem-
standard periodontal therapy, laboratory tests of plaque
comitans.91-93,95 Thus, the protective antibody response
samples may identify periodontal pathogens that are
afforded by IgG2, as well as the clinical manifestations
resistant to antibiotics typically used to treat periodon-
of aggressive periodontitis, is modified by patients’
titis.103 It has been suggested that follow-up tests
genetic background as well as environmental factors
after additional antibiotic or other therapy is provided
such as smoking and bacterial infection.89,91-93,95,96
may be helpful in confirming elimination of targeted
Successful treatment of aggressive periodontitis
depends on early diagnosis, directing therapy against
Chronic periodontitis is most prevalent in adults,
the infecting microorganisms and providing an envi-
but can occur in children and adolescents. It can be
ronment for healing that is free of infection.97 While
localized (less than 30% of the dentition affected) or
there is some disagreement among individual studies
generalized (greater than 30% of the dentition
regarding treatment of LAgP, most authors recommend
affected) and is characterized by a slow to moderate
a combination of surgical or non-surgical root debride-
rate of progression that may include periods of rapid
ment in conjunction with antimicrobial (antibiotic) ther-
destruction. Furthermore, the severity of disease can
apy.47,98 These findings are supported by other work
be mild (1 to 2 mm clinical attachment loss), mod-
in which meticulous and repeated mechanical therapy
erate (3 to 4 mm clinical attachment loss), or severe
with antibiotics proved to be sufficient to arrest most
(≥5 mm clinical attachment loss). Children and young
cases of LAgP.99 However, surgical treatment may be
adults with this form of disease were previously stud-
effective in eliminating A. actinomycetemcomitans with-
ied along with patients having LAgP and GAgP. There-
out the use of antibiotics.100 In a study of 25 deep peri-
fore, published data are lacking for this group.
odontal lesions (probing depths 5 to 11 mm) in young
In patients with one of several systemic diseases that
LAgP patients, scaling and root planing alone were
predispose to highly destructive disease of the primary
ineffective for the elimination of A. actinomycetem-
teeth, the diagnosis is periodontitis as a manifestation
comitans, while surgical therapy was effective.100 It is
of systemic disease. As with adults, periodontitis asso-
not known, however, if A. actinomycetemcomitans is
ciated with systemic diseases occurs in children and
the only organism involved in disease pathogenesis.
adolescents. Such diseases include Papillon-Lefèvre
The majority of reports suggest that the use of
syndrome,121-125 cyclic neutropenia,126-130 agranulo-
antibiotics is usually beneficial in the treatment of
cytosis,131,132 Down’s syndrome,133-135 hypophos-
LAgP. Two reports described using antibiotics exclu-
phatasia,136 and leukocyte adherence deficiency.137,138
sively.97,101 In both reports, LAgP patients attained
It is probable that defects in neutrophil and immune
significant clinical attachment gain when assessed
cell function associated with these diseases play an
after 12 months with tetracycline therapy alone. Most
important role in increased susceptibility to periodon-
reports in the past 10 years, however, have recom-
titis and other infections. In Down’s syndrome, for exam-
mended combination therapy using antibiotics and
ple, the amount of periodontal destruction has been
surgical or non-surgical root debridement as the opti-
shown to be positively correlated with the severity of the
mal treatment for LAgP.98,102-116 The most successful
neutrophil chemotaxis defect.135 In some cases, specific
antibiotics reported are the tetracyclines, sometimes
genes have been associated with these diseases. Exam-
prescribed sequentially with metronidazole.103,117,118
ples include the cathepsin C gene and Papillon-Lefèvre
Metronidazole in combination with amoxicillin has
syndrome139-141 and the tissue non-specific alkaline
also been utilized, especially where tetracyline-resis-
phosphatase gene and hypophosphatasia.136
tant A. actinomycetemcomitans are present.111 A sin-
The consensus report of the 1999 Workshop specif-
gle randomized control study in which oral penicillin
ically excluded diabetes-associated periodontitis as a
was used reported that therapy was successful with
specific form of periodontitis associated with systemic
disease. Participants concluded that diabetes is a sig-
While the use of antibiotics in conjunction with sur-
nificant modifier of all forms of periodontitis. In a sur-
gical or non-surgical root debridement appears to be
vey of 263 type 1 diabetics, 11 to 18 years of age,
quite effective for the treatment of LAgP, GAgP does
10% were found to have overt periodontitis often
not always respond well to conventional mechanical
localized to first molars and incisors, although peri-
therapy or to antibiotics commonly used to treat peri-
odontitis was also found in a generalized pattern.142
odontitis.30,118,120 Alternative antibiotics may be
Affected subgingival sites harbored A. actinomycetem-
required, based upon the character of the pathogenic
comitans and Capnocytophaga sp.143
Position Paper
Periodontitis as a manifestation of systemic disease
decrease in symptoms.157 If the patient is febrile, antibi-
in children is a rare disease that often begins between
otics may be an important adjunct to therapy. Metro-
the time of eruption of the primary teeth up to the age
nidazole and penicillin have been suggested as drugs
of 4 or 5.144,145 The disease occurs in localized and
generalized forms. In the localized form, affected sitesexhibit rapid bone loss and minimal gingival inflam-
mation.144 In the generalized form, there is rapid bone
Children and adolescents are subject to several peri-
loss around nearly all teeth and marked gingival inflam-
odontal diseases. Although there is a much lower preva-
mation. Neutrophils from some children with a clini-
lence of destructive periodontal diseases in children
cal diagnosis of periodontitis as a manifestation of
than in adults, children can develop severe forms of
systemic disease have abnormalities in a cell surface
periodontitis.23 In some cases, this destructive disease
glycoprotein (LFA-1, leukocyte functional antigen–1,
is a manifestation of a known underlying systemic dis-
also known as CD11, and Mac-1). The neutrophils in
ease. In other young patients, the underlying cause for
these patients having LAD (leukocyte adhesion defi-
increased susceptibility and early onset of disease is
ciency) are likely to have a decreased ability to move
unknown. These diseases are often familial, suggesting
from the circulation to sites of inflammation and infec-
a genetic predisposition for aggressive disease. Current
tion.137 Affected sites harbor elevated percentages of
modalities for managing periodontal diseases of chil-
putative periodontal pathogens such as A. actino-
dren and adolescents may include antibiotic therapy in
mycetemcomitans, Prevotella intermedia, Eikenella cor-
combination with non-surgical and/or surgical therapy. rodens, and Capnocytophaga sputigena.146,147
Since early diagnosis ensures the greatest chance for
Treatment of periodontitis as a manifestation of sys-
successful treatment,97 it is important that children
temic disease in children is similar to the treatment of
receive a periodontal examination as part of their rou-
localized and generalized aggressive periodontitis in the
permanent dentition and has been reported to includesurgical or non-surgical mechanical debridement and
ACKNOWLEDGMENTS
antimicrobial therapy.124,127-130,132,134,142,144 Localized
The primary author for this paper is Dr. Joseph V.
lesions have been treated successfully with this ap-
Califano. Members of the 2002-2003 Research, Sci-
proach,144,145 but the degree of predictable success in
ence and Therapy Committee include: Drs. Terry D.
managing generalized periodontitis is low when sys-
Rees, Chair; Christopher Cutler; Petros Damoulis;
temic diseases are contributing factors.144,145 In many
Joseph Fiorellini; William Giannobile; Henry Green-
cases, the affected teeth had to be extracted.138,144,145
well; Angelo Mariotti; Steven Offenbacher; LeslieSalkin; Brian Nicoll, Board Liaison; Robert J. Genco,
NECROTIZING PERIODONTAL DISEASES
Necrotizing periodontal diseases (NPD) occur with vary-ing but low frequency (less than 1%) in North American
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Tiziana Pietrangelo, PhD ADDRESS: Department of Basic and Applied Medical Science (BAMS), University “G. d’Annunzio”, Chieti- Pescara; Lab. Clinical Physiology Clinical Research Center (C.R.C.) on Centre of Excellence for Research on Ageing (Ce.S.I.); Via dei Vestini, 29 66013 Chieti (Italy) Tel: +39 0871 355 4554 Fax +39 0871 355 4563; e-mail tiziana@unich.it DATE / PLACE OF BIR
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