激光生物学报
激光生物學報
격광생물학보
Acta Laser Biology Sinica
2015年
4期
341-347
,共7页
崔庆哲%杨经纬%凌琳%程庭清%吴先友%江海河
崔慶哲%楊經緯%凌琳%程庭清%吳先友%江海河
최경철%양경위%릉림%정정청%오선우%강해하
Er:YAG激光%脉宽%牙本质%消融阈值
Er:YAG激光%脈寬%牙本質%消融閾值
Er:YAG격광%맥관%아본질%소융역치
Er:YAG laser%pulse width%dentin%ablation threshold
研究了Er:YAG激光消融离体牙本质过程中激光脉宽对消融阈值、消融深度以及消融后牙硬组织微结构的影响。使用50μs到1 ms脉宽的Er:YAG激光对人牙本质在无喷水冷却下消融实验,通过体式光学显微镜观察样品消融切口进而测量消融坑洞深度,利用扫描电镜( SEM )观察消融后牙本质的形态。实验结果表明,随着激光脉宽的增加,Er:YAG激光对人牙本质的消融阈值、消融深度呈现逐渐增大的趋势,同时还观察到高能量密度消融实验中牙小管封闭以及牙本质熔融现象。该实验结果对了解Er:YAG激光消融牙硬组织的微观过程及牙科治疗应用具有参考价值。
研究瞭Er:YAG激光消融離體牙本質過程中激光脈寬對消融閾值、消融深度以及消融後牙硬組織微結構的影響。使用50μs到1 ms脈寬的Er:YAG激光對人牙本質在無噴水冷卻下消融實驗,通過體式光學顯微鏡觀察樣品消融切口進而測量消融坑洞深度,利用掃描電鏡( SEM )觀察消融後牙本質的形態。實驗結果錶明,隨著激光脈寬的增加,Er:YAG激光對人牙本質的消融閾值、消融深度呈現逐漸增大的趨勢,同時還觀察到高能量密度消融實驗中牙小管封閉以及牙本質鎔融現象。該實驗結果對瞭解Er:YAG激光消融牙硬組織的微觀過程及牙科治療應用具有參攷價值。
연구료Er:YAG격광소융리체아본질과정중격광맥관대소융역치、소융심도이급소융후아경조직미결구적영향。사용50μs도1 ms맥관적Er:YAG격광대인아본질재무분수냉각하소융실험,통과체식광학현미경관찰양품소융절구진이측량소융갱동심도,이용소묘전경( SEM )관찰소융후아본질적형태。실험결과표명,수착격광맥관적증가,Er:YAG격광대인아본질적소융역치、소융심도정현축점증대적추세,동시환관찰도고능량밀도소융실험중아소관봉폐이급아본질용융현상。해실험결과대료해Er:YAG격광소융아경조직적미관과정급아과치료응용구유삼고개치。
The influence of pulse length on Er:YAG laser ablation of hard dental tissue during ablation,especially in the aspect of the ablation threshold and ablation rate and the microstructure were studied. Er:YAG laser were used with pulse lengths from 50 μs to 1 ms and different energies to ablate dentine samples with no spray cooling. Ablation depth of the hole were measured by observing the ablation incision under optical microscope and apply scanning electron micro-scope to observe morphology changes of dentin after irradiation. Results show that with the increase of pulse length,Er:YAG laser ablation threshold of dentin and the ablation depth of the hole showed a trend of increasing gradually. The re-sults of the experiment show that the increase of pulselength and energy density can make the occlusion of tooth tubular and melt dentine gradually. People should choose appropriate pulselength and energy density of Er:YAG laser in practi-cal treatment, which can reduce the damage.