Atraumatic vertical tooth extraction: a proof of principle clinical study of a novel system

Research output: Contribution to journalArticlepeer-review


  • Egon Muska
  • Clemens Walter
  • Alan Knight
  • Pankaj Taneja
  • Michael Hahn
  • Mayur Desai

Colleges, School and Institutes


OBJECTIVE: The aim of this study was to evaluate the applicability and limitations of a novel atraumatic extraction system. STUDY DESIGN: Seventy-two patients with severely decayed teeth or root remnants not suitable for forceps extraction were consecutively recruited and had 111 teeth extracted with the use of a novel atraumatic vertical extraction system (Benex). Various patient, tooth, and procedure data were recorded and analyzed. RESULTS: Overall, 92 out of 111 teeth (83%) were successfully extracted. The success rate was higher in single-rooted teeth (89%) and lower in multirooted teeth (43%), with a risk ratio for failure of multirooted versus single-rooted teeth of 5.2 (95% confidence interval 2.5-10.7). The majority of failures were characterized by insufficient retention of the screw and/or root fracture, which mainly occurred as a result of caries in the root canal, misplacement/misalignment of the screw by the surgeon, or a fracture of the root in response to drilling and/or moderate input of traction force. CONCLUSIONS: The Benex extractor system may be successfully used for atraumatic tooth extraction. The system has a higher success rate with single-rooted teeth compared with multirooted teeth. Extraction failure is mostly associated with insufficient retention or misplacement of the screw and root fracture.


Original languageEnglish
JournalOral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology
Publication statusPublished - 2012