Three dimensional measurement of the palate using the semiconductor laser 2. Changes in the palate section areas, palate projection areas and palate volumes in the mixed dentition

Abstract

The objective of the study was to examine changes in palate sectional areas, palate projection areas and palate volumes according to age. Using the maxillary dentition models, the palates of 7-, 8-and 9-year-old children, who were in the mixed dentition period, were measured threedimensionally using the semiconductor laser. The palate section areas, particularly between deciduous canines, primary first molars, primary second molars and first molars, increased with age, as the palate expanded vertically along with the growth and development of the maxilla. The palate projection areas increased with age, as the palate expanded laterally along with the growth and development of the maxilla. The palate volume increased with age, as the palate expanded laterally and vertically. dentition period were investigated as children age. Materials and Methods Materials Pediatric patients age 7, 8 and 9 who visited the department of pediatric dentistry, Osaka Dental University Hospital, selected for the study were children who hardly had any caries, whose maxillary central incisors and lateral incisors of both sides erupted and whose occlusal relation of the first molar was at the class I. And they were not recognized the dysfunction of the circumoral muscles including the oral habits. The impression of the maxillary mixed dentition of each child was taken with impression materials to prepare the study model of maxillary mixed dentition. These models were measured for the distance between the lowest points of the palatal cervical portion of the maxillary bilateral deciduous canines (C L-C L), the distance between the lowest points of the palatal cervical portion of the bilateral maxillary primary first molars (D L-D L) and the

Three dimensional measurements of the palate using a semiconductor laser: The influence of anterior cross bite on the palate in deciduous dentition

“…Sb) The Sa was 280.3 mm 2 for the cross bite in comparison with 309.8 mm 2 in normal occlusion 4) , indicating that the anterior palate projection area was smaller for the anterior cross bite. The Sb was 283.3 mm 2 for the anterior cross bite in comparison with 293.0 mm 2 in normal occlusion 4) , both being similar.…”

“…Comparisons of palate section areas (Sc, Sd, Se and Sf) The Sc area was 25.8 mm 2 for the anterior cross bite in comparison with 54.3 mm 2 in normal occlusion 4) , indicating that the palate section area of the width of the deciduous canine was smaller in the anterior cross bite condition. The Sd area was 121.7 mm 2 for the anterior cross bite in comparison with 140.9 mm 2 in normal occlusion 4) , indicating that the palate section area of the width of the primary first molar was smaller for the anterior cross bite. However, the Se area was 214.3 mm 2 for the anterior cross bite in comparison with 177.5 mm 2 in normal occlusion 4) , indicating that the palate section area of the width of the secondary primary molar was greater for the anterior cross bite.…”

“…Anterior cross bite, Deciduous dentition, Palate, Semiconductor laser, Three dimensional measurements age) using a semiconductor laser 4) .…”

“…Therefore, it is thought that, in anterior cross bite, the interdentition section area, the intradentition projection area and the palate volume differ greatly from normal. We used a semiconductor laser to make three dimensional measurements of the palate with anterior cross bite of deciduous dentition 4) . We examined the influences of anterior cross bite on the interdentition section area, the intradentition projection area, and the palate volume.…”