Chemical Characterization of Lased Root Surfaces Using Fourier Transform Infrared Photoacoustic Spectroscopy

Spencer, Paulette; Trylovich, David J.; Cobb, Charles M.

doi:10.1902/jop.1992.63.7.633

Cited by 60 publications

(34 citation statements)

References 8 publications

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“…CO o laser irradiation of' tooth enamel has demonstrated the differential ablation of the organic components of the tissue resulting in an increase in the mineral content of surface (30). The increase in the mineral content of the surface relative to the protein component has been confirmed by several methods and seen with other lasers including Nd-YAG (31). Both COz and Nd-YAG lasers have caused the fusion of enamel and dentine with the melting and recrystallization of the mineral elements of teeth (32,33).…”

Section: Discussionmentioning

confidence: 91%

Scanning electron microscopy of otic capsule and calvarial bone ablated by a holmium-YAG laser

et al. 1994

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Abstract. Scanning electron microscopy (SEM) was performed oll holmium-YAG laser ablated bone in order to study the surface morphology of the ablation crater. An otosurgical bone model of porcine otic capsule and calvarial cortical bone was used. Otic capsule bone is dense and homogeneous whereas cortical bone is porous. Both bone tissues were studied under fresh and dehydrated conditions to investigate the role of water in the ablation process. Laser irradiation time was varied from 5 to 60s. Laser flux was 85mJ pulse-~ at 4-Hz pulse repetition rate. Globular spheroids of melted bone material were noted in both wet and dried specimens for both tissues. Several of these globules ruptured yielding an SEM image which suggests a violent ejection process. SEMs of dry cortical bone demonstrated the presence of fibres which reflect the selective removal of inorganic surface bone constituents with preservation of subsurface residual collagen fibres. The ablation crater walls in wet tissues appear rougher and possibly reflect a more violent ablation process due to water vaporization causing expulsion of bone material. In contrast, the crater walls in dry tissue appear smoother.

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Section: Discussionmentioning

confidence: 91%

Scanning electron microscopy of otic capsule and calvarial bone ablated by a holmium-YAG laser

et al. 1994

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“…[31][32][33] This micromelting and recrystallization within the hard tissues were associated with relatively high mineral contents for the root surface, which may cause increased microhardness and acid resistance. 34 Oosterwaal et al demonstrated that the half-life of fluorescein gel applied to periodontal pockets was 12.5 min.…”

Section: Discussionmentioning

confidence: 99%

Nd:YAG Laser Irradiation of the Tooth Root Surface Inhibits Demineralization and Root Surface Softening Caused by Minocycline Application

Watanabe

Fukuda

Mitani

et al. 2013

Photomedicine and Laser Surgery

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Objective: The aim of this study was to investigate the effect of laser irradiation on root surface demineralization caused by local drug delivery systems (DDS), and to evaluate the effect of sealing on drug retention. Background data: The duration of supportive periodontal treatment (SPT) has increased with increasing life expectancy. Repeated root planing and DDS application during SPT should be reconsidered with regard to their effects on the root surface. Methods: Extracted human teeth were collected, cut into 3 · 3 · 2 mm root dentin specimens, and divided randomly into eight groups with various combinations of Nd:YAG laser power (0, 0.5, 1, and 2 W), with and without DDS (minocycline HCl). Specimen microhardness and calcium (Ca) solubility were measured after treatment. The specimens (control and laser and DDS groups) were examined by scanning electron microscopy. Forty SPT patients were recruited, to assess the effect of periodontal pocket sealing on drug retention. Results: Laser irradiation increased the microhardness of root specimens in an energy-dependent manner. Calcium solubilities decreased from the 0 W + DDS group to the 2.0 W + DDS group. The mean Ca solubilities in the 1.0 W + DDS and 2.0 W + DDS groups were significantly lower than in the 0 W + DDS group ( p < 0.01, p < 0.001, respectively). Laser irradiation counteracted the softening effect of DDS. Morphologic change was observed in the 2W + DDS group; however, no morphologic changes were observed in the control and the 1W + DDS groups. The mean concentration of minocycline in the periodontal pocket 24 h after application was 252.79 -67.50 lg/mL.Conclusions: Laser irradiation of the root surface inhibited the softening and decalcification caused by minocycline HCl. Sealing the periodontal pockets effectively improved drug retention. These results suggest that the combination of laser irradiation and DDS could benefit patients receiving repeated SPT.

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“…Yumuşak dokuya kıyasla sert dokuda absorbsiyon çok küçüktür. 19,20 Lazerin Biyolojik Dokuda Etki Mekanizması Lazer ışığının herhangi bir termal etkisi olmadan absorbsiyonu ile molekül ve atomların fiziksel ve kimyasal özelliklerini değiştirmesine fotokimyasal etki denir. Lazer ışığının termik etkisi denilince dokuda koagülasyon ve buharlaşma meydana geldiği anlaşılır.…”

Section: -15unclassified

Er: YAG Lasers in Dentistry

Görüş¹,

Meşe²,

Çetindağ³

et al. 2018

EÜ Dişhek Fak Derg

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ÖZETLazerler, 20 yıldır kullanımda olmalarına ve yapılan çok sayıda bilimsel araştırmaya karşın diş hekimleri için araştırma konusu olmaya devam etmektedir. Günümüzde lazerler, spesifik dalga boylarıyla geniş bir kullanım alanına sahiptirler. Lazer uygulamaları, henüz kullanılan tedavi prosedürlerinin yerini alamasalarda, kavite preperasyonu, hipersensitivite tedavisi, yüzey pürüzlendirme, diş beyazlatma, diştaşı temizliği, endodontik uygulamalar, kemik ablasyonu ve analjezide alternatif olarak kullanılabilmekte ve dişhekimliğinin önemli bir unsuru haline gelmektedir. Lazer teknolojisindeki gelişmelerle beraber her geçen gün lazerin dişhekimliğinde kullanımı ile ilgili olarak yeni olanaklar ortaya çıkmaktadır. Özellikle dental sert dokular üzerindeki etkileri ve kullanım olanakları üzerine çalışmalar devam etmektedir. Bu çalışmada lazerlerin dental sert dokular üzerindeki uygulamaları, Er: YAG lazerler ve özel PIPS (Photon Induced Photoacustic Streaming) uçları hakkında bilgi verilmeye çalışılmıştır. (Photon Induced Photoacustic Streaming) Anahtar Kelimeler: Lazer, ER: YAG Lazer, PIPS ABSTRACT Despite being on the market for over two decades and the numerous research, dental lasers are still a research subject for dentists. Nowadays, lasers with specific wavelengths have widespread uses. Laser procedures have not been considered as a primary treatment option, but it can be used as an alternative

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Chemical Characterization of Lased Root Surfaces Using Fourier Transform Infrared Photoacoustic Spectroscopy

Cited by 60 publications

References 8 publications

Scanning electron microscopy of otic capsule and calvarial bone ablated by a holmium-YAG laser

Scanning electron microscopy of otic capsule and calvarial bone ablated by a holmium-YAG laser

Nd:YAG Laser Irradiation of the Tooth Root Surface Inhibits Demineralization and Root Surface Softening Caused by Minocycline Application

Er: YAG Lasers in Dentistry

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