Prevention of demineralization by CO2 and Er,Cr:YSGG laser irradiation of overdenture abutments. 2006

Luke A Darling, and Ronald L Ettinger, and James S Wefel, and Steven H Cooper, and Fang Qian
Department of Prosthodontics and Dows Institute for Dental Research, College of Dentistry, University of Iowa, Iowa City, IA 52242, USA.

OBJECTIVE To assess the effects of Er,Cr:YSGG and CO2 laser irradiation on the prevention of demineralization of overdenture abutments. METHODS 32 human canines, premolars, and molars were acquired, cleaned, and scaled. They were randomly divided into two groups. Each tooth had two windows on the occlusal cut dentin. One window on each tooth was irradiated by either Er,Cr:YSGG or CO2 laser, while the other window served as a control. After pH cycling at pH 5.5 for 18 days and pH 4.7 for 16 days, the teeth were sectioned and analyzed using polarized light microscopy with water as the imbibing medium. RESULTS The Er,Cr:YSGG irradiated dentin had a mean lesion depth of 207 +/- 27 microm while its control had a mean lesion depth of 209 +/- 34 microm. The CO2 laser irradiated dentin had a mean lesion depth of 185 +/- 24 microm while its control had a mean lesion depth of 205 +/- 22 microm. Based on paired t-tests Er,Cr:YSGG laser irradiation of dentin did not reduce demineralization when compared to the controls (P= 0.81), while CO2 laser irradiation of dentin showed that it helped reduce demineralization when compared to the controls (P= 0.025).

UI MeSH Term Description Entries
D010865 Pilot Projects Small-scale tests of methods and procedures to be used on a larger scale if the pilot study demonstrates that these methods and procedures can work. Pilot Studies,Pilot Study,Pilot Project,Project, Pilot,Projects, Pilot,Studies, Pilot,Study, Pilot
D003804 Dentin The hard portion of the tooth surrounding the pulp, covered by enamel on the crown and cementum on the root, which is harder and denser than bone but softer than enamel, and is thus readily abraded when left unprotected. (From Jablonski, Dictionary of Dentistry, 1992) Dentine,Dentines,Dentins
D003828 Denture, Overlay Removable prosthesis constructed over natural teeth or implanted studs. Overdenture,Dentures, Overlay,Overdentures,Overlay Denture,Overlay Dentures
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000044 Dental Abutments Natural teeth or teeth roots used as anchorage for a fixed or removable denture or other prosthesis (such as an implant) serving the same purpose. Abutments, Dental,Abutment, Dental,Dental Abutment
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D017001 Tooth Demineralization A tooth's loss of minerals, such as calcium in hydroxyapatite from the tooth matrix, caused by acidic exposure. An example of the occurrence of demineralization is in the formation of dental caries. Demineralization, Tooth
D053685 Laser Therapy The use of photothermal effects of LASERS to coagulate, incise, vaporize, resect, dissect, or resurface tissue. Laser Knife,Laser Scalpel,Surgery, Laser,Vaporization, Laser,Laser Ablation,Laser Knives,Laser Photoablation of Tissue,Laser Surgery,Laser Tissue Ablation,Nonablative Laser Treatment,Pulsed Laser Tissue Ablation,Ablation, Laser,Ablation, Laser Tissue,Knife, Laser,Knifes, Laser,Knive, Laser,Knives, Laser,Laser Knifes,Laser Knive,Laser Scalpels,Laser Surgeries,Laser Therapies,Laser Treatment, Nonablative,Laser Treatments, Nonablative,Laser Vaporization,Nonablative Laser Treatments,Scalpel, Laser,Scalpels, Laser,Surgeries, Laser,Therapies, Laser,Therapy, Laser,Tissue Ablation, Laser
D028022 Low-Level Light Therapy Treatment using irradiation with light of low power intensity so that the effects are a response to the light and not due to heat. A variety of light sources, especially low-power lasers are used. LLLT,Laser Biostimulation,Laser Irradiation, Low-Power,Laser Therapy, Low-Level,Photobiomodulation,Laser Phototherapy,Laser Therapy, Low-Power,Low-Level Laser Therapy,Low-Power Laser Irradiation,Low-Power Laser Therapy,Photobiomodulation Therapy,Biostimulation, Laser,Irradiation, Low-Power Laser,Laser Irradiation, Low Power,Laser Therapies, Low-Level,Laser Therapies, Low-Power,Laser Therapy, Low Level,Laser Therapy, Low Power,Light Therapies, Low-Level,Light Therapy, Low-Level,Low Level Laser Therapy,Low Level Light Therapy,Low Power Laser Irradiation,Low Power Laser Therapy,Low-Level Laser Therapies,Low-Level Light Therapies,Low-Power Laser Therapies,Photobiomodulation Therapies,Photobiomodulations,Phototherapy, Laser,Therapies, Low-Level Light,Therapies, Photobiomodulation,Therapy, Low-Level Light,Therapy, Photobiomodulation

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