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Intrusion of teeth with class III furcation: a clinical, histologic and histometric study in dogs
Author(s) -
Da Silva Vanessa C.,
Cirelli Carolina C.,
Ribeiro Fernando S.,
Leite Fábio R. M.,
Benatti Neto Carlos,
Marcantonio Rosemary A. C.,
Cirelli Joni A.
Publication year - 2008
Publication title -
journal of clinical periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.456
H-Index - 151
eISSN - 1600-051X
pISSN - 0303-6979
DOI - 10.1111/j.1600-051x.2008.01293.x
Subject(s) - molar , furcation defect , dentistry , intrusion , medicine , soft tissue , orthodontics , surgery , geochemistry , geology
Aim: To assess orthodontic intrusion effects on periodontal tissues in dogs' pre‐molars with class III furcations treated with open flap debridement (OFD) or with guided tissue regeneration (GTR) associated to bone autograft (BA). Material and Methods: Class III furcations were created in the pre‐molars of seven mongrel dogs. After 75 days, teeth were randomly treated with OFD or GTR/BA. After 1 month, metallic crowns were assembled on pre‐molars and connected apically to mini‐implants by nickel–titanium springs. Teeth were randomly assigned to orthodontic intrusion (OFD+I and GTR/BA+I) groups or no movement (OFD and GTR/BA) groups. Dogs were sacrificed after 3 months of movement and 1 month retention. Results: All class III furcations were closed or reduced to class II or I in the intrusion groups, while 50% of the lesions in non‐moved teeth remained unchanged. Intruded teeth presented higher probing depth and lower gingival marginal level than non‐moved teeth ( p <0.01). Clinical attachment gain was reduced in the intrusion groups by the end of retention ( p <0.05). OFD+I presented smaller soft tissue area and larger bone tissue area than other groups ( p <0.05). Conclusion: Orthodontic intrusion with anchorage via mini‐implants improved the healing of class III furcation defects after OFD in dogs. GTR/BA impaired those results.