Journal of clinical periodontology · 2008
Intrusion of teeth with class III furcation: a clinical, histologic and histometric study in dogs.
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da Silva Vanessa C, Cirelli Carolina C, Ribeiro Fernando S, Leite Fábio R M, Benatti Neto Carlos, Marcantonio Rosemary A C, Cirelli Joni A
Аннотация
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.
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.
Предметные рубрики MeSH
Alveolar ProcessAnimalsBicuspidBone TransplantationDebridementDental CementumDogsFurcation DefectsGingival RecessionGuided Tissue Regeneration, PeriodontalOrthodontic Anchorage ProceduresOrthodontic AppliancesOrthodontic RetainersOrthodontic WiresPeriodontal Attachment LossPeriodontal LigamentPeriodontal PocketRandom AllocationStress, MechanicalSurgical FlapsTime FactorsTooth Movement TechniquesTransplantation, AutologousTreatment Outcome