One-step transversal palatal distraction and maxillary repositioning: technical considerations, advantages, and long-term stability. Cortese A, Savastano M, Savastano G, Claudio PP. Source Department of Oral and Maxillofacial Sciences, University of Naples Federico II, Naples, Italy. Abstract BACKGROUND: Transversal maxillary hypoplasia in adolescence is a frequently seen pathology, which can be treated with a combination of surgery and orthodontic treatment to widen the maxilla in skeletally matured patients.We evaluated the advantages of a new surgical technique: Le Fort I distraction osteogenesis using a bone-borne device. Because relapse is one of the main problems in surgical maxillary expansion, long-term stability of this new technique was evaluated. METHODS: Data from 4 adult patients with maxillary restriction, class III malocclusion, or maxillary malposition were collected preoperatively, 4 months after distraction, and 5 years after distraction. Measurements were recorded on dental models to detect palatal expansion at dental level; cephalograms by lateral and posteroanterior plane were analyzed to detect maxillary movements. RESULTS: Maxillary measurements were substantially stable 5 years after distractions. Only minor dental movements occurred at the dental analysis after 5 years related to a lack of orthodontic contention without any compromise of the dental result (no crossbite relapse and class I stability). CONCLUSIONS: Le Fort I with down-fracture for expansion and repositioning by bone-borne distractor device cannot be used to simultaneously widen, advance, and vertically reposition the maxilla without causing healing problems, particularly using a rigid distraction device. Long-term stability can be achieved; however, further studies with a larger number of patients will be necessary for better evaluation. PMID: 21959418 [PubMed - indexed for MEDLINE]
One-step transversal palatal distraction and maxillary repositioning: technical considerations, advantages, and long-term stability.
CORTESE, ANTONIO;SAVASTANO, Germano;
2011-01-01
Abstract
One-step transversal palatal distraction and maxillary repositioning: technical considerations, advantages, and long-term stability. Cortese A, Savastano M, Savastano G, Claudio PP. Source Department of Oral and Maxillofacial Sciences, University of Naples Federico II, Naples, Italy. Abstract BACKGROUND: Transversal maxillary hypoplasia in adolescence is a frequently seen pathology, which can be treated with a combination of surgery and orthodontic treatment to widen the maxilla in skeletally matured patients.We evaluated the advantages of a new surgical technique: Le Fort I distraction osteogenesis using a bone-borne device. Because relapse is one of the main problems in surgical maxillary expansion, long-term stability of this new technique was evaluated. METHODS: Data from 4 adult patients with maxillary restriction, class III malocclusion, or maxillary malposition were collected preoperatively, 4 months after distraction, and 5 years after distraction. Measurements were recorded on dental models to detect palatal expansion at dental level; cephalograms by lateral and posteroanterior plane were analyzed to detect maxillary movements. RESULTS: Maxillary measurements were substantially stable 5 years after distractions. Only minor dental movements occurred at the dental analysis after 5 years related to a lack of orthodontic contention without any compromise of the dental result (no crossbite relapse and class I stability). CONCLUSIONS: Le Fort I with down-fracture for expansion and repositioning by bone-borne distractor device cannot be used to simultaneously widen, advance, and vertically reposition the maxilla without causing healing problems, particularly using a rigid distraction device. Long-term stability can be achieved; however, further studies with a larger number of patients will be necessary for better evaluation. PMID: 21959418 [PubMed - indexed for MEDLINE]I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
