title: Comparison of clinical parameters and environmental noise levels between regular surgery and piezosurgery for extraction of impacted third molars.
abstract: OBJECTIVE
  Impacted third molars can be extracted by regular surgery or piezosurgery. The aim of this study was to compare clinical parameters and device-produced noise levels between regular surgery and piezosurgery for the extraction of impacted third molars.
  
  
  METHODS
  Twenty patients (18 women and 2 men, 17-29 years of age) with bilateral symmetrical impacted mandibular or maxillary third molars of the same level were included in this randomized crossover clinical trial. The 40 impacted third molars were divided into a control group (n = 20), in which the third molar was extracted by regular surgery using a high-speed handpiece and an elevator, and an experimental group (n = 20), in which the third molar was extracted by piezosurgery using a high-speed handpiece and a piezotome. The clinical parameters were evaluated by a self-reported questionnaire. The noise levels produced by the high-speed handpiece and piezotome were measured and compared between the experimental and control groups.
  
  
  RESULTS
  Patients in the experimental group had a better feeling about tooth extraction and force delivery during extraction and less facial swelling than patients in the control group. However, there were no significant differences in noise-related disturbance, extraction period, degree of facial swelling, pain score, pain duration, any noise levels produced by the devices under different circumstances during tooth extraction between the control and experimental groups.
  
  
  CONCLUSIONS
  The piezosurgery device produced noise levels similar to or lower than those of the high-speed drilling device. However, piezosurgery provides advantages of increased patient comfort during extraction of impacted third molars.
authors.affiliation: Department of Dentistry, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan; School of Dentistry, National Taiwan University, Taipei, Taiwan.
authors.forename: Hao-Hueng
authors.initials: HH
authors.lastname: Chang
authors.affiliation: Cardinal Tien Hospital Yung Ho Branch, New Taipei City, Taiwan.
authors.forename: Ming-Shu
authors.initials: MS
authors.lastname: Lee
authors.affiliation: Cardinal Tien Hospital Yung Ho Branch, New Taipei City, Taiwan.
authors.forename: You-Chyun
authors.initials: YC
authors.lastname: Hsu
authors.affiliation: School of Dentistry, National Taiwan University, Taipei, Taiwan; Cardinal Tien Hospital Yung Ho Branch, New Taipei City, Taiwan. Electronic address: shangjye707@yahoo.com.tw.
authors.forename: Shang-Jye
authors.initials: SJ
authors.lastname: Tsai
authors.affiliation: School of Dentistry, National Taiwan University, Taipei, Taiwan; Cardinal Tien Hospital Yung Ho Branch, New Taipei City, Taiwan.
authors.forename: Chun-Pin
authors.initials: CP
authors.lastname: Lin
mesh_terms: D000293:Adolescent; D000328:Adult; D018592:Cross-Over Studies; D005260:Female; D006801:Humans; D008297:Male; D008964:Molar, Third / Q000601:surgery*; D009622:Noise; D061646:Operative Time; D010147:Pain Measurement; D010149:Postoperative Pain / Q000209:etiology; D059745:Piezosurgery / Q000379:methods*; D011183:Postoperative Complications; D057566:Self Report; D013624:Taiwan; D014081:Tooth Extraction / Q000379:methods*; D014095:Tooth, Impacted / Q000601:surgery*; D055815:Young Adult
keywords: high-speed drilling device; impacted third molar; noise; patient comfort; piezosurgery device