Nasomaxillary and mandibular bone growth in primary school girls aged 7 to 12 years

Maxillofacial growth changes after maxillary protraction therapy in children with class III malocclusion: a dual control group retrospective study

PURPOSE

To investigate the balance between post-treatment effect and continued nature growth after maxillary protraction treatment in patients with skeletal class III malocclusion.

METHODS

31 patients aged 8.79 ± 1.65 years with skeletal Class III malocclusion had been treated with maxillary protraction and the treatment lasted an average of 1.16 years. The average observation duration after treatment in the maxillary protraction group was 2.05 ± 0.39 years. In the control groups, a sample of 22 patients (9.64 ± 2.53 years) with untreated skeletal class III malocclusion and 24 patients (9.28 ± 0.96 years) with skeletal class I malocclusion were matched to the treatment group according to age, sex and observation period. The mean observation interval of the control groups was 2.39 ± 1.29 years in the class III group and 1.97 ± 0.49 years in the class I group.

RESULTS

The active orthopedic treatment effect showed a opposite trend to the natural craniomaxillofacial growth effect after treatment in many aspects. In the observation duration of treatment group, decrease in ANB, Wits appraisal and BAr-AAr were statistically significant compared to class I control group (p < 0.001), and there was a significant increase in NA-FH (P < 0.001) which was contrary to class III control group. Treatment group presented a significant increase in Gn-Co (P < 0.01) and Co-Go (P < 0.001), except for changes in the extent of the mandibular base (Pog-Go, P = 0.149) compared to class I control group. The vertical maxillomandibular skeletal variables (Gonial; MP-SN; MP-FH; Y-axis) in treatment group decreased significantly compared to those in class III control group (P < 0.01). U1-SN and L1-MP showed a significant increase, which was similar to the class I group (P > 0.05), and overjet decreased significantly relative to both of the two control groups (P < 0.05).

CONCLUSION

Maxillary protraction therapy led to stable outcomes in approximately 77.42% of children with Class III malocclusion approximately 2 years after treatment. Unfavorable skeletal changes were mainly due to the greater protrusion of the mandible but maxillary protraction did have a certain degree of postimpact on the mandibular base. Protraction therapy does not fundamentally change the mode of maxillary growth in Class III subjects except for the advancement of the maxilla. Craniomaxillofacial region tend to restabilize after treatment and lead to skeletal growth rotation and more dentoalveolar compensation.

Management of Nasal Bone Osteoma with Columella Approach: A Case Report

BACKGROUND: Osteoma is a benign bone tumor with an incidence rate of about 1% of primary bone tumors. Osteoma of the nasal bone is a rare case and the rate of recurrence reported in the literature after surgery is about 10%. Osteoma most often occurs in young people in the second and third decades, mostly in men. Osteoma can be treated surgically with an external approach or with an endoscopic approach. The surgical technique with an incision technique open rhinoplasty with transcolumella incision extensions is effective, because it can minimize surgical scars post-operative and correct the esthetic problems. CASE REPORT: Reported a case of a 11-year-old boy with chief complaint a lump on the right side of the nose that enlarged slowly in the last 2 months and diagnosed with suspected as nasal bone osteoma based on physical examination and CT Scan. Patient was performed management with tumor resection with columella approach technique and give the good result because can minimizes surgical scars postoperative. On the results of histopathological examination after operation were nasal bone osteoma. CONCLUSION: Osteoma of the nasal bone is a very rare benign bone tumor. One of the surgical techniques that can be performed in cases of nasal bone osteoma is tumor resection with columella approach. Although the case of nasal bone osteoma has a very rare recurrence; in this case, the recurrence occurred 4 months after tumor resection.

Analysis of Facial Skeletal Morphology: Nasal Bone, Maxilla, and Mandible

The growth and development of facial bones are closely related to each other. The present study investigated the differences in the nasomaxillary and mandibular morphology among different skeletal patterns. Cephalograms of 240 participants were divided into 3 groups based on the skeletal pattern (Class I, Class II, and Class III). The dimensions of nasomaxilla (nasal bone length, nasal ridge length, nasal depth, palatal length, and maxillary height) and mandible (condylar length, ramus length, body length, symphysis length, and entire mandibular length) were measured. One-way analysis of variance and Pearson's correlation test were used for statistical analysis. No significant differences were observed among the skeletal patterns in terms of nasal bone length, palatal length, maxillary height, or condylar length. Class II had a significantly shorter ramus, mandibular body, and entire mandibular length compared with those of Class I and Class III. Nasal ridge length exhibited a significant moderate correlated with nasal bone length (correlation coefficient: 0.433) and maxillary height (correlation coefficient: 0.535). The entire mandibular length exhibited a significant moderate correlated with ramus length (correlation coefficient: 0.485) and body length (correlation coefficient: 0.536). In conclusion, nasal and maxillary dimensions exhibited no significant difference among the 3 skeletal patterns. Mandibular body and entire mandibular lengths were significantly positively correlations with Class III skeletal patterns.