ABSTRACT
The purpose of this study was to evaluate the relation between the treatment duration and cephalometric measurements and the PAR index in Class I malocclusion patients. In 100 Class I malocclusion patients, PAR score and cephalometric measurements were taken from study model and cephalometric radiographs and cephalmetric radiographs and analyzed statistically. The results of this study were obtained as follows: 1. Treatment duration was correlated with extraction and pre PAR index. 2.ANB, FMA,FMIA and IMPA exhibited positive correlation between pre PAR index and pretreatment cephalometric measurements. 3. 1 to FP exhibited positive correlation between post PAR index and posttreatment cephalometric measurements, and 1 to FP exhibited negative correlation. 4. 1 to SN, II A and 1 to FP exhibited positive correlation between % PAR reduction and the change of cephalometric measurements FMA, FMIA, WITS and UL, exhibited negative correlation. The results of this study indicate that PAR index taken from study model relate with items concerned with upper and lower incisors, and there are the tendency that pretreatment PAR index are larger in the patients with large ANB value and hyperdivergent face.
Subject(s)
Humans , Incisor , Malocclusion , RitodrineABSTRACT
The purpose of this case report is to provide the information of the treatment of the impacted-displaced teeth associated with the disease in the jaw. A 10-year-old boy presented with a large radiolucent lesion accompanying the displacement of the second premolar and first molar in the left mandibular body area. The lesion was diagnosed as unicystic ameloblastoma. As a surgical procedure for the present case, marsupialization was executed. For the eruption of displaced impacted teeth, no orthodontic intervention was done for second premolar while a helical spring was used for the forced eruption of first molar. Good occlusion was established by simple orthodontic intervention.