نتایج جستجو برای: ultrasonic scaling

تعداد نتایج: 103314  

2012
Otgonbayar Unursaikhan Jung-Seok Lee Jae-Kook Cha Jung-Chul Park Ui-Won Jung Chang-Sung Kim Kyoo-Sung Cho Seong-Ho Choi

PURPOSE The use of appropriate instruments to clean surfaces with minimal change, is critical for the successful maintenance of a dental implant. However, there is no consensus about the type and methodology for such instruments. The aim of this study was to characterize changes in the roughness of titanium surfaces treated by various scaling instruments. METHODS Thirty-seven identical disks ...

Journal: :International journal of dental hygiene 2007
T Arabaci Y Ciçek C F Canakçi

Periodontal therapy aims at arresting periodontal infection and maintaining a healthy periodontium. The periodic mechanical removal of subgingival microbial biofilms is essential for controlling inflammatory periodontal disease. Mechanical periodontal therapy consists of scaling, root planing and gingival curettage. The sonic and ultrasonic scalers are valuable tools in the prevention of period...

2010
Takayuki KAGOMIYA Seiji NAKAGAWA

Human listeners can perceive speech signals in a voicemodulated ultrasonic carrier from a bone-conduction stimulator, even if the listeners are patients with sensorineural hearing loss. Considering this fact, we have been developing a boneconducted ultrasonic hearing aid (BCUHA). This paper reports an evaluation of the BCUHA; the evaluation was carried out by considering the transmission of par...

Journal: :Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology) 1990

2013
Reza Amid Mahdi Kadkhodazadeh Reza Fekrazad Farzin Hajizadeh Arash Ghafoori

PURPOSE The present study aimed to measure root surface roughness in teeth with periodontitis by a profilometer following root planning with ultrasonic and hand instruments with and without erbium-doped yttrium aluminium garnet (Er:YAG) laser irradiation. METHODS Sixty single-rooted maxillary and mandibular teeth, extracted because of periodontal disease, were collected. The crowns and apices...

Journal: :Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology) 1990

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - پژوهشکده مهندسی فرایند 1395

abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...

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