Document Detail

Rate of mesial translation of mandibular molars using implant-anchored mechanics.
MedLine Citation:
PMID:  8893103     Owner:  NLM     Status:  MEDLINE    
Retromolar dental implants served as anchorage to close first molar extraction sites in five adult patients. Rates of unidirectional space closure for mandibular second molars were assessed with periapical radiographs superimposed on anatomical landmarks and retromolar anchorage implants. Regression analysis revealed that mesial displacement of the midroot area of the leading root was less variable (r = 0.97) than for other landmarks on the same teeth: crown (r = 0.83), alveolar crest (r = 0.82) or apex (r = 0.90). When mesial root movement (uprighting) was the principal feature of the initial mechanics (4 of the 5 patients), mesial movement of the apex was about 0.60 mm/mo for the first 8 months and then decreased to about 0.34 mm/mo as the trailing (distal) root of the second molar engaged the relatively dense bone formed by the leading (mesial) root. During the last year of space closure, radiolucent foci were noted 1-2 mm ahead of the distal root. These data suggest: (1) sustained orthodontic translation is a physiological manifestation of bone modeling and remodeling throughout the adjacent alveolar process, and (2) rate of mandibular molar translation is inversely related to the apparent radiographic density of the resisting alveolar bone.
W E Roberts; G R Arbuckle; M Analoui
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Angle orthodontist     Volume:  66     ISSN:  0003-3219     ISO Abbreviation:  Angle Orthod     Publication Date:  1996  
Date Detail:
Created Date:  1997-02-04     Completed Date:  1997-02-04     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0370550     Medline TA:  Angle Orthod     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  331-8     Citation Subset:  D; IM    
Department of Oral Facial Development, Indiana University School of Dentistry, Indianapolis 46202, USA.
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MeSH Terms
Alveolar Process / pathology,  physiology,  radiography
Bone Density
Bone Remodeling
Dental Implants*
Diastema / therapy
Mandible / pathology,  physiology,  radiography
Molar* / pathology,  radiography
Regression Analysis
Stress, Mechanical
Tooth Apex / pathology,  radiography
Tooth Crown / pathology,  radiography
Tooth Extraction
Tooth Movement* / instrumentation,  methods
Tooth Root / pathology,  radiography
Grant Support
Reg. No./Substance:
0/Dental Implants

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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