ࡱ> 241q` RqbjbjqPqP2::q  1*:::::::$[h :: :: ::   : P  01   : H t::: :::1  Title:In vivo mandibular elastic deformation during clenching on pivots Author(s): HYPERLINK "http://wos15.isiknowledge.com/CIW.cgi?SID=Z2BpEl7c9GkG4GojDN9&Func=OneClickSearch&field=AU&val=Jiang+T&curr_doc=1/1&Form=FullRecordPage&doc=1/1" \o "one-click search" Jiang T,  HYPERLINK "http://wos15.isiknowledge.com/CIW.cgi?SID=Z2BpEl7c9GkG4GojDN9&Func=OneClickSearch&field=AU&val=Ai+M&curr_doc=1/1&Form=FullRecordPage&doc=1/1" \o "one-click search" Ai M Source:JOURNAL OF ORAL REHABILITATION 29 (2): 201-208 FEB 2002 Document Type:Article Language:English  HYPERLINK "http://wos15.isiknowledge.com/CIW.cgi?SID=Z2BpEl7c9GkG4GojDN9&Func=PagedCitedRefList&UT=000174572700014&doc=1/1&rec_id=124039385" Cited References: 10 Times Cited: 0  HYPERLINK "http://wos15.isiknowledge.com/CIW.cgi?SID=Z2BpEl7c9GkG4GojDN9&Func=EasyRelated&UT=000174572700014&doc=1/1&rec_id=124039385"  INCLUDEPICTURE "http://images.isiknowledge.com/WoK3/Images/relrec.gif" \* MERGEFORMATINET  HYPERLINK ""  INCLUDEPICTURE "http://images.isiknowledge.com/WoK3/Images/info.gif" \* MERGEFORMATINET  Abstract:Lower rigidly connected long span bridges supported by natural abutments or implants sometimes become loose, come off, or fracture after a period of usage. Many reasons have been discussed for these failures. However, few researchers have shown the influence of mandibular elastic deformation on the abutments, although this influence is likely to produce a distortion force between the abutment and prosthesis. Therefore, this study measured the elastic deformation of the human mandibular arch during clenching on pivots by using charge-coupled device (CCD) cameras and an image analysing system. When the subjects clenched on the canines (unilaterally or bilaterally) or bilateral second molars, no mandibular deformation was found; whereas when the subjects clenched on the unilateral second molars, the mandibular arch on the non-pivot side moved upward and inward and the straight line distances between the right and left measurement points decreased by 0.2 mm. The magnitude of deformation is smaller than the depressible limit of periodontal membrane. This suggests that the influence of mandibular deformation on the connected prosthesis is negligible in the case of the natural root supported long span bridge but should probably be considered in the case of the implant supported bridge. Author Keywords:mandible; deformation; distortion; clenching; human Addresses:Jiang T (reprint author), Peking Univ, Sch Stomatol, Dept Prosthet Dent, 38 Baishiqiao Rd,Haidian Dist, Beijing, 100081 Peoples R China Peking Univ, Sch Stomatol, Dept Prosthet Dent, Beijing, 100081 Peoples R China Tokyo Med & Dent Univ, Tokyo, Japan Publisher:BLACKWELL PUBLISHING LTD, 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND Subject Category:DENTISTRY, ORAL SURGERY & MEDICINE IDS Number:534EY ISSN:0305-182X HJTUV       & / 9 : жККККiжККiжКК,hh>*B*CJKHOJQJ^Jph2hh5>*B*CJKHOJQJ\^Jph6jhhB*CJKHOJQJU^JaJph3hh5B*CJKHOJQJ\^JaJph-hhB*CJKHOJQJ^JaJph/hh5B*CJKHOJQJ\^Jph&J  & 9 S rM`pq $1$a$gd $1$9Da$gdq M N O P Q S \ r(MX`epq䱚~䱚fffffffa ho(/hh5B*CJKHOJQJ\^Jph6jhhB*CJKHOJQJU^JaJph-hhB*CJKHOJQJ^JaJph6jhhB*CJKHOJQJU^JaJph-hhB*CJKHOJQJ^JaJph6jhhB*CJKHOJQJU^JaJph0182P. 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