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with Charles M. Cobb, D.D.S., M.S., Ph.D.
Lasers and Periodontics: Fact and Fiction
This course is primarily intended for the general dentist and dental hygienist with an interest in the application of laser technology in the treatment of the inflammatory periodontal diseases and other common soft tissue problems. The course will address both the good and questionable aspects of laser applications in periodontics. In addition, the course will provide sufficient information to allow the practitioner to make an informed decision regarding purchase of laser and what type of laser is best suited for his/her specific
practice.
Educational Objectives
Those attending this seminar will become familiar with:
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The different types of laser wavelengths and the importance of wavelength in clinical
applications.
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How lasers interact with biological tissues and how variations in laser parameters impact on wavelength/tissue
interactions.
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A variety of oral soft tissue applications and the indications and contraindications for laser usage.
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The concept of evidence based decision making and treatment based on peer-reviewed published
evidence.
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The published clinical trials in the process of answering the following questions:
A. Is laser mediated periodontal therapy vs. traditional non-surgical therapy, equal to, worse than, or better at reducing probing depth and bleeding on probing and increasing gains in clinical attachment?
B. Is laser mediated periodontal therapy vs. traditional non-surgical therapy, equal to, worse than, or better at reducing subgingival bacterial populations?
C. Does laser periodontal therapy predictably achieve desired clinical
end-points?
D. Does the evidence support use of the laser mediated crown lengthening as a routine procedure in practice?
COURSE OUTLINE
I. The importance of wavelength:
A. The Electromagnetic Spectrum
B. Wavelength (nm) Absorption in Oral Tissues
a. Argon (480-510 nm)
b. Diode (810-980 nm)
c. Nd:YAG (1,060 nm)
d. Er,Cr:YAG (2,780 nm)
e. Er:YAG (2,940 nm)
f. CO2 (10,600 nm)
C. Wavelength and extinction coefficient in water
D. Factors that dictate laser wavelength interaction with oral tissues:
a. Waveform (continuous, pulsed and hyperpulsed)
b. Energy beam profile
c. Energy level
d. Duration of irradiation
e. Tissue factors:
1. Water content
2. Mineral content
3. Organic components
4. Color
E. Possible interactions of laser with oral tissues:
a. Penetration
b. Scatter
c. Reflection
d. Absorption
F. Thermal interactions of laser with oral tissues:
a. Warming
b. Coagulation
c. Vaporization
d. Carbonization
e. Rapid incision
G. Bad Decisions on Parameters = Bad
Results
II. Laser Applications for Soft Tissue Problems
A. Gingivectomy
B. Gingivoplasty
C. Frenulectomy
D. Lesion Ablation
E. Crown Lengthening
F. Gingival Depigmentation
G. Excisional & Incisional Biopsy
H. Removal of Granulation Tissue
I. Cauterization of Aphthous Ulcers
J. 2nd Stage Exposure of Dental Implants
K. Coagulation of Soft Tissue Graft Donor
Sites
III. Evidence-Based Decision Making and Analysis of Perio & Lasers in the Peer- Reviewed Literature
A. Wound Healing
B. Effects on Root Surfaces
C. Effects on Bone
D. Effects on Calculus and Dental
Biofilm
IV. Failure of surgical treatment and/or laser treatment of chronic periodontitis is due to access and inability to remove all
calculus
V. Laser Treatment of Periodontitis: Ability, Predictability, Success or Failure
A. The use of a dental laser as a periodontal treatment modality is based on the perceived benefits of:
a. Subgingival curettage
b. Laser Assisted New Attachment Procedure (LANAP ')
c. Significant decreases in subgingival bacterial loads
B. The LANAP TM Technique (Nd:YAG)
VI. Review of Published Clinical Trials
A. Problems associated with a critical analysis of the literature
B. Comparative results for Nd:YAG, Diode and Er:YAG lasers
a. Reduction in probing depth
b. Reduction in bleeding on probing
c. Reduction in subgingival bacterial load
d. Gains in clinical attachment
level
VII. Laser Mediated Flapless Crown Lengthening Technique
A. Problems to look for during initial diagnosis and treatment planning
a. Bone dehiscence
b. Location of CEJ
c. Potential for root damage
d. Ability to contour bone as required and desired
e. Thick facial bone and potential for creating an intrabony
pocket
VIII. Conclusions and Editorial
A. Is laser mediated periodontal therapy vs. traditional non-surgical therapy, equal to worse than or better at reducing probing depth and bleeding on probing and increasing gains in clinical attachment?
B. Is laser mediated periodontal therapy vs. traditional non-surgical therapy, equal to worse than or better at reducing subgingival bacterial populations?
C. Does laser periodontal therapy predictably achieve desired clinical end-points?
D. Does the evidence support laser mediated crown lengthening as aroutine procedure in practice?
E. From the Wall Street Journal, Market Place Section, September 14, 2007: "Most science studies appear to be tainted by sloppy analysis"
Periodontal Disease and the Systemic
Link
This course is primarily intended for the general dentist and dental hygienist with an interest in the treatment of the inflammatory periodontal diseases. The course will provide sufficient information to allow the practitioner to make informed decisions regarding patient care based on risk assessment for development of periodontal disease and the risk of potential systemic complication if oral inflammation is not controlled.
Educational
Objectives
Those attending this seminar will become familiar with the:
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Current epidemiology of periodontal
disease.
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Role of subgingival microbial biofilm, successional colonization, and the Red Complex microbes and their associations with inflammation and the systemic inflammatory
response.
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Pathogenesis of chronic
periodontitis
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Biologic plausibility for an oral-systemic
link.
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Relationship between periodontal disease and atherosclerosis and cardiovascular disease and ischemic stroke.
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Relationship between periodontal disease and adverse pregnancy outcomes, pre-term birth, low birth weight, fetal growth restriction, and
pre-eclampsia.
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The bi-directional relationship between the inflammatory periodontal diseases and diabetes.
COURSE OUTLINE
I. Introduction
A. Epidemiology of periodontitis
a. Cobb CM, Williams KB, Gerkovitch M. Is The Prevalence of Periodontitis in the United States in Decline? Periodontol 2000 2008; In
Press.
B. Is the profession of dentistry fulfilling its role in the timely diagnosis of periodontal disease?
a. Cobb CM, et al. Periodontal Referral Patterns, 1980 versus 2000: A Preliminary Study. J Periodontol 2003:74:1470-1474.
b. Dockter KM, et al. Relationship Between Pre-referral Periodontal Care and Periodontal Status at Time of Referral. J Periodontol 2006;77:1708-1716.
c. Couper DJ, et al. The periodontitis and vascular events (PAVE) pilot study: Recruitment, retention, and community care controls. J Periodontol
2008;79:80-89.
C. Subgingival microbial biofilm, successional colonization, and the Red Complex microbes.
a. Root associated biofilm
b. Epithelial associated biofilm
c. Plankton microbes
d. Tissue Invasive
microbes
D. The pathogenesis of chronic periodontitis:
a. Bacteremia and Endotoxemia
b. Pathogenesis of and role of genetics in periodontitis:
1. Cytokines
2. Inflammatory mediators
3. Matrix metalloproteinase
4. Genetics and the hyper-inflammatory
response
II. Biologic Plausibility for an Oral-Systemic Link
A. The common periodontal diseases (gingivitis and periodontitis) are characterized by a host immune response to a mixed Gram-negative anaerobic bacterial infection. The host reaction results in a localized inflammation that, in turn, generates a variety inflammatory mediators, such as IL-1, IL-6, TNF-(, and PGE2 and matrix metalloproteinases.
B. There is a direct relationship between poor oral hygiene and the presence and severity of periodontal disease and the incidence of bacteremia.
C. There is evidence that bacteremia, endotoxemia, and elevated systemic levels of inflammatory mediators are associated with moderate and advanced chronic periodontitis.
D. There is evidence of the presence of viable bacteria in atheromas and/or the tunica intima/media of vessels that exhibit atherosclerotic lesions.
E. There is evidence suggesting that chronic periodontitis is associated with elevated levels of acute-phase proteins, particularly C-reactive protein.
F. There is evidence that treatment of periodontal disease can decrease levels of C-reactive protein.
III. The Relationship between Periodontal Disease & Cardiovascular Diseases
A. Current research literature
indicates:
a. The odds of having a history of heart attacks increases with the severity of periodontal
disease.
b. The odds of experiencing a stroke are even greater with increased severity of periodontal
disease.
c. Specific periodontal pathogenic bacteria have been associated with
atherosclerosis.
d. Periodontal bacteria may remain viable and survive translocation from the oral cavity to cardiovascular and/or arterial endothelium.
B. Model for relationship between periodontal inflammation, atherosclerosis, cardiovascular, and cerebrovascular
disease
C. The evidence (selected
articles):
a. Haraszthy VI, et al. Identification of periodontal pathogens in atheromatous plaques. J Periodontol
2000;71:1554-1560
b. Desvarieux M, et al. Periodontal microbiota and carotid intima-media thickness. The oral infections and vascular disease epidemiology study (INVEST). Circulation
2005;111:576-582
c. Feihn N-E, et al. Identification of periodontal pathogens in atherosclerotic vessels. J Periodontol
2005;76:731-736
d. Kozarov EV, et al. Human atherosclerotic plaque contains viable invasive Actinobacillus actinomycetemcomitans and Porphyromonas gingivalis. Arterioscler Thromb Vasc Biol 2005;25:e17-e18
e. Spahr A, et al. Periodontal infections and coronary heart disease. Arch Intern Med
2006;166:554-559
f. Offenbacher S, Beck JD. A perspective on the potential cardioprotective benefits of periodontal therapy. Am Heart J
2005;149:950-954.
g. Espinola-Klein C, et al. Impact of infectious burden on progression of carotid atherosclerosis. Stroke
2002;33:2581-2586
h. Amar S, Gokce N, Morgan S, et al. Periodontal disease is associated with brachial artery endothelial dysfunction and systemic inflammation. Arterioscler Thromb Vasc Biol
2003;23(8):1309-1311.
i. Grau AJ, et al. Periodontal disease as a risk factor for ischemic stroke. Stroke
2004;35:496-501.
j. D'Aiuto F, Parkar M, Nibali L, et al. Periodontal infections cause changes in traditional and novel cardiovascular risk factors: Results from a randomized controlled clinical trial. Am Heart J
2006;151:977-984.
k. Cairo F, Castellani S, Gori AM, Nieri M, Baldelli G, Abbate R, Pini-Prato GP. Severe periodontitis in young adults is associated with sub-clinical atherosclerosis. J Clin Periodontol 2008;35: In
Press.
l. Colhoun HM, Slaney JM, Rubens MB, Fuller JH, Sheiham A, Curtis MA. Antibodies to periodontal pathogens and coronary artery calcification in type 1 diabetic and nondiabetic subjects. J Periodont Res
2008;43:103-110.
m. Elka(m R, Dahan M, Kocgozlu L, Werner S, Kanter D, Kretz JG, Tenenbaum H. Prevalence of periodontal pathogens in subgingival lesions, atherosclerotic plaques and healthy blood vessels: A preliminary study. J Periodont Res 2008;43: 224-231.
n. Paraskevas S, Huizinga JD, Loos BG. A systematic review and meta-analyses on C-reactive protein in relation to periodontitis. J Clin Periodontol
2008;35:277-290.
o. D'Aiuto F, Parkar M, Tonetti MS. Acute effects of periodontal therapy on bio-markers of vascular health. J Clin Periodontol 2007;34:124-129.
D. Conclusion:
a. The number of inflammatory disease events to which an individual has been exposed is a major risk factor for development of atherosclerosis. Chronic periodontitis represents an inflammatory infection that may exist for years, thereby exposing the patient to continuous microbial insult with all the inherent metabolic events associated with inflammation. Given such a scenario, moderate and advanced chronic periodontitis represent a controllable risk factor for development of atherosclerosis that, in turn, may lead to adverse cardiovascular and cerebrovascular events.
E.
Implications:
a. Dentists and physicians may need to focus more on primary prevention of infection by periodontal
pathogens.
b. End-points for prevention will involve eliminating periodontal pathogens and reducing inflammation.
c. Controlling inflammation and infection may create an increased need for anti-infective and anti-inflammatory pharmacological strategies for high risk
patients.
IV. The Relationship Between Periodontal Disease and Adverse Pregnancy Outcome
A. Pregnancy related periodontal disease:
a. Gingivitis
b. Periodontitis
c. Pyogenic Granuloma
1. Hormones, Prevotella intermedia and Inflammation
B. Preterm Low Birth Weight Delivery (PTLBW)
a. In the United States, 6% to 9% of all births are preterm.
b. Preterm births account for 70% of all perinatal deaths and 50% ofall long-term neurologic morbidity.
C. Evidence for a relationship between infection and PTLBW delivery:
a. Clinically evident infection is increased in mothers and newborns after preterm birth
(PTB).
b. The prevalence of histologic chorioamnionitis is increased in
PTB.
c. Positive bacterial cultures of the amniotic fluid or membranes are common in patients with preterm
labor/PTB.
d. Bacterial vaginosis as well as genital tract infections of Ureaplasma urealyticus, Chlamydia, or Trichamonas vaginalis have been associated with
PTLBW.
e. Some antibiotic clinical trials have shown a lower rate of PTB or have prolonged
gestation.
f. In a mouse model, maternal Campylobacter rectus infection induces placental inflammation, decidual * hyperplasia, and increase in fetal brain IFN-(. These changes, in turn, resulted in increased pup mortality and ultrastructural changes in the hippocampal region of the
brain.
1. Decidual cells are surface cells of the endometrium surrounding the implanted embryo that are stimulated to proliferate and contribute to placenta formation.
g. Numerous biochemical markers of infection are seen in preterm labor. There are increased levels of PGE2, IL-1, IL-6 and TNF-( found in the amniotic fluid.
1. All of these may lead to myometrial contractions, membrane rupture, cervical ripening, and PTLBW
delivery.
h. The association of periodontal disease with PTLBW is not due to a concomitant vaginosis or chorioamnionitis.
i. Periodontal disease seems to represent an additional pathway of infectious and/or inflammatory exposure to the maternal-fetal unit.
j. Bacteria or their products induce PTB in animal models (Porphyromonas gingivalis & Campylobacter rectus).
k. Looking at fetal and maternal antibody activity against certain periodontal pathogens shows that in the absence of maternal IgG reactivity and the presence of fetal IgM reactivity, the prematurity rate was 66.7% (OR 10.3) - suggestive of a blood-borne infectious pathway (Madianos, et al., Ann Periodontol
2001;6:175-182)
l. Yiping WH, et al. Transmission of an uncultivated Bergeyella strain from the oral cavity to amniotic fluid in a case of preterm birth. J Clin Microbiol 2006;44:1475-1483.
1. This article demonstrates the potential for placental barrier invasion and habitation of an oral pathogenic microbe within the amniotic
cavity.
D. Model for the relationship between periodontal disease and preterm low birth rate delivery
a. Pitiphat W, et al. Maternal periodontitis and adverse pregnancy outcomes. Community Dent Oral Epidemiol 2008;36:3-11.
b. Goldenberg RL, et al. Epidemiology and causes of preterm birth. Lancet 2008;371(9606):75-84.
E. Periodontal disease and pre-eclampsia
F. Periodontal disease and fetal growth
restriction
V. Periodontal Disease and
Diabetes
A. The six major complications of diabetes:
a. Angiopathy
b. Nephropathy
c. Neuropathy
d. Retinopathy
e. Altered Wound Healing
f. Periodontal
Disease
B. Pathobiology of diabetes and the relationship to:
a. Altered function and loss of vascular integrity
b. Thrombosis and atheroma formationc. Elevated serum levels of inflammatory mediators, e.g., IL-1, IL-6, and TNF-(
C. Southerland JH, et al. Commonality in chronic inflammatory diseases: Periodontitis, diabetes, and coronary artery disease. Periodontol 2000 2006;40:130-143.
D. Model for the bi-directional relationship between periodontitis and
diabetes
a. Poorly controlled diabetic patients are at 2-3 times greater risk for developing periodontal
disease
b. Once periodontal disease has developed, poor metabolic control leads to more aggressive periodontal destruction
c. Periodontal disease, like any other infection, complicates glycemic
control
d. Poor glycemic control increases the risk for delayed and impaired wound healing and serious diabetic complications (e.g., angiopathy, retinopathy, neuropathy,
nephropathy).
E. Model for the relationship between inflammation, obesity, diabetes, and periodontal
disease
F. Clinical presentation of the oral manifestations of Type I and Type II
diabetes.
G. The Scottsdale
Project:
a. Hein C, Cobb CM, Iacopino A. Report of Independent Panel of Experts of The Scottsdale Project. The Independent Study Initiative for Collaboration in Diabetes, Cardiovascular Disease and Periodontal Disease Intervention. Grand Rounds in Oral-Systemic Medicine 2007;2(No. 3,
Supplement):1-27
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