ABSTRACT
The purposes of this study were to compare the soft tissue changes following hard tissue change after surgery between the one jaw and two-jaw surgery in skeletal class III patients and to get the reference of the incisal inclination at presurgical orthodontics. For this study 24 patients for the two-jaw surgery group and 18 patients for one jaw surgery group were selected. Lateral cephalograms were taken at pretreatment, after presurgical orthodontic treatment, immediately after surgical treatment and at least 6 months after surgery. They were traced and analyzed on skeletodental structure and soft tissue. The results were as follows: 1. After surgery, maxilla, maxillary incisors and upper lip were moved anteriorly and superiorly in two-jaw surgery group. Mandible and mandibular incisors were moved posteriorly and superiorly, and thickness of lower lip was increased in both group but there were no statistically significant difference. Anterior facial height was more decreased in two-jaw surgery group (p<0.05). At least 6 months after surgery, by the postorthodontic treatment, maxillary incisors were moved labially 1.44mm, mandible and mandiibular incisors were moved lingually 1.43mrn, 1.26mm respectively in one jaw surgery group. But there was no statistically significant changes of hard tissue in two :jaw surgery group. 2. The correlation coefficients of maxillary hard and soft tissue horizontal changes were high in two jaw surgery group and the ratios for soft tissue to A point were 19% at Sri, 80% at SLS, 82% at LS. The ratios for soft tissue to B point were 92% at Ll, 104% at iiS in one jaw surgery group, 89% at LI, 101% at ILS in two-jaw surgery group. 3. The correlation coefficients and change ratios of mandibular incisors and LL HS on lower lip horizontal changes were 0 0.89 and 75%, 85% in one jaw surgery group, 0.93, 0.90 and 76%, 87% in two-jaw surgery group. The correlation coefficients of maxillary incisors and Sn, SLS and LS on upper lip horizontal changes were 072, 0.76 and 0.75 in two jaw surgery group and ratios of changes were 57%, 58% and 59%. 4. The regression equations between skeletal horizontal discrepancy and incisal inclinaton were taken in one jaw surgery group. Those were FM1A=57.48-2.17ANB, U1-SN=-75.02+2.17SNB and R2 were 0.63, 063 respectively. So if there is skeletal horizontal discrepancy by mandibular prognathism in one jaw surgery case, we consider attaining more labial inclination of maxillary incisors than normal and more lingual inclination of mandibu ar incisors than nonnal. But correlation coefficient of the regression equations in two jaw surgery group was low, so, that equation was not reliable.
Subject(s)
Humans , Incisor , Jaw , Lip , Mandible , Maxilla , Orthodontics , Orthognathic Surgery , PrognathismABSTRACT
This study was performed to evaluate the hyoid bone position and airway in skeletal class III malocclusion and to prove the correlation between airway, hyoid bone position and mandibular position. The sample, considered of 47 class III malocclusion patients for experimental group and 52 class I malocclusion students for control group. Twenty three linear and angular measurements about hyoid bone position, airway size, mandibular position were taken from the lateral cephalograms. The differences between skeletal class III malocclusion group and normal occlusion group were compared and the correlation were evaluated statistically. The results obtained were as follows, 1. There were significant difference in S-APH, A-APH, N-APH, LAH-PBR, AA-PNS, PNS-ad between class I and class III malocclusion groups. 2. The hyoid bone was more anteriorly positioned in class III malocclusion group than class I malocclusion group and skeletal airway size in class III malocclusion group was smaller than class I malocclusion group. 3. There were significant difference in several measurements especially vertical and angular measurements of hyoid bone position and airway size between male and female. Usually the measurements in male were larger than female. 4. There were no significant correlation between hyoid bone position and airway size also airway size, and didn't showed significant correlation with mandibular position. 5. S-APH showed negative correlation with Wits appraisal and A-APH, N-APH showed positive correlation with Wits appraisal. On the contrary vertical measurements of hyoid bone position showed positive correlation with lower facial height.
Subject(s)
Female , Humans , Male , Hyoid Bone , MalocclusionABSTRACT
Clinical observation was performed on 81 cases who were received exchange transfusion at Ilsin Christian Hospital from January, 1986 to Decrmber, 1990. The results obtained were as follows: 1) Among 6,388 cases of neonatal jaundice, the exchange transfusion was performed on 81 cases (1.27%). 2) There was no sex predominance (male 40, female 41). The birth weight of 75 cases(92.6%) ranged from 2,500 gm 4,000 gm. 3) The most predominant delivery type was normal vaginal delivery (66 cases, 81.5%). Instrumental delivery was 9 cases (11.1%) that was higher than control group (4.2%). 4) Analysing the exchanged 81 cases, sepsis accounted for 28 cases (34.6%) of the total exchanged group:ABO incompatibility 25 cases (30.9%), complicated causes 13 cases(16.0%), unknown causes 12 cases (14.8%) and Rh incompatibility 1 cases (1.2%). 5) Repeated exchange transfusion was required in 12 cases (16.0%). 6) In 20 cases (24.7%), exchange transfusion was performed on 7 days or more after birth. In 4 cases (4.9%), including 1 cases of Rh incompatibility, exchange transfusion was done within 24 hours after birth. 7) The most common organism of sepsis, which was the most predominant etiology of exchange transfusion was E. coli in 12 cases (31.5%). 8) After exchange transfusion, serum bilirubin, Hb and reticulocyte count were decreased by 24%, 22% and 36%, respectively.
Subject(s)
Female , Humans , Infant, Newborn , Bilirubin , Birth Weight , Jaundice, Neonatal , Parturition , Reticulocyte Count , SepsisABSTRACT
When mandibular prognathic patients are operated orthognathic surgery which reduce the oral cavity volume, tongue volume should be harmonized with oral cavity volume to be changed because prevent the relapse of malocclusion. To decide the need for tongue resection, the author measured the tongue volume and oral cavity volume with stone model which were taken by impression method and study the difference between the ratio of tongue and oral cavity volume in mandibular prognathic group and normal group. The samples were consisted of four groups, the 40 subjects of the control group, 40 subjects of the experimental group. Each group was subdivided into male and female group respectively. The results were as follows: 1. The tongue volume and oral cavity volume measurements are 20.7cm3, 32.7cm3 in the control group respectively, and 24.9cm3, 42.9cm3 in the experimental group respectively. 2. There is no difference in the ratio of the tongue volume to oral cavity volume in control group and experimental group. 3. Correlation coeffiecients between the tongue volume and oral cavity volume are 0.11, 0.29 in experimental group and control group respectively, and 0.43 in gross total group. 4. The tongue volume of male is larger than female(p<0.05).
Subject(s)
Female , Humans , Male , Malocclusion , Mouth , Orthognathic Surgery , Prognathism , Recurrence , TongueABSTRACT
A clinical observation was performed on the 80 cases of neonates born from diabetic mothers among the total of 34,936 neonates delivered at II Sin Christian Hospital from January 1985 to December 1989. The results were as follows: 1) The incidence of infants of diabetic mothers was 0.23%, among whom gestational diabetic mothers were 63 cases (78.7%) and overt diabetic mothers were 17 cases (21.3%). 2) Among the complications of pregnancy and delivery, preeclampsia was most frequent as 33.8%, following by urinary tract infection (13.8%), polyhydramnios (1.3%), diabetic ketoacidosis (1.3%). 3) According to the gestational age, prematurity was 11.3%, full term 78.7% and post term 10%. And according to the growth state, small for date infants were 11.3%, appropriate for date infants 53.7% and large for date infants 35%. 4) The incidnece of giant babies (over 4,000 gm) was 30.0% and sex ratio of male to female was 1.1:1 in infants of diabetic mothers. 5) The most frequent clinical manifestation was tachypnea (45.3%), following by poor feeding (20.0%), cyanosis (18.7%). 6) According to the laboratory findings, 53.7% showed hypoglycemia, 36.3% hyperbilirubinemia, 25% hypocalcemia, 15% polycythemia. 7) On the chest X-ray, there were pulmonary infiltration and hyaline membrane disease in 3.2% each other and pulmonary congestion and wet lung in 1.6% each other. 8) The incidence of congenital anomaly was 13.8% in 80 cases of infants of diabetic mothers, and congenital heart disease was most frequent as 3 cases.