Background:Impacted teeth is a common pathology in dentistry, account for about 30 \ufffd?40% of the youth with the age from 20 to 25 (according to the study of Mai Dinh Hung). Impacted teeth need to be operated. Especially, in autogenous tooth transplantation, impacted teeth have a role as donor teeth and must be intact. Therefore, we have to localize impacted teeth by tube shift technique prior operation. Objectives: To assess the results of tube shift technique when localizing impacted teeth. Subjects and method: This was a prospective study on 75 patients from 6 to 61 years old, who have X-ray taken in 90 areas to locate impacted teeth in Hanoi Odonto Stomatology Institute from November 2002 to September 2003. Observation 57 cases and compare the preliminary interpretation of the radiographs and the result post \ufffd?operated. Results: The sameness ratio between diagnosis in X-ray film and post \ufffd?operated is 82.4%. The Kappa index is 0.87 indicated that the results of tube shift technique is high accurate. Conclusion: The outcome of tube shift technique is very accurate in localizing buccolingual direction of impacted teeth. However, to have complete information about the impacted teeth, we should coordinate with other films.
Tooth ; Impacted/ therapy ; Methods ;

OBJECTIVE: This study aimed to investigate the prognosis of permanent teeth with external root resorption (ERR) caused by adjacent impacted teeth. METHODS: A total of 75 ERR teeth (permanent teeth) caused by adjacent impacted teeth of 63 patients were included. The prognosis of ERR teeth was analyzed followed by minimally invasive extraction of the adjacent impacted teeth. The time of follow-up was six months. The relationship between prognosis of ERR teeth and patients' age, gender, root number, type of root resorption and degree of root resorption were analyzed. RESULTS: In the 75 ERR teeth, 67 teeth (89.3%) did not show pulpitis symptoms. The clinical outcome was found to be related with age (r=0.330, P<0.05), whereas no relationships with gender, root number, as well as type and degree of root resorption were observed (P>0.05). Pulpitis symptom was not found in ERR teeth of patients under 30 years old. CONCLUSIONS For ERR teeth caused by adjacent impacted teeth, keeping the pulp vital after surgical removal of impacted teeth is highly probable. Post-operative follow-up instead of preventive root canal therapy of ERR teeth is recommended.
Adult ; Humans ; Prognosis ; Pulpitis ; Root Canal Therapy ; Root Resorption ; Tooth, Impacted

OBJECTIVES: This study aimed to establish a new treatment of the mandibular second molars with external root resorption caused by impacted teeth to preserve the affected teeth and their vital pulps. METHODS: For mandibular second molars clinically diagnosed as external root resorption caused by impacted teeth, debridement and removal of the root at the resorption site via micro-apical surgery and direct capping of the pulp with bioactive material on the surface of the root amputation via vital pulp therapy were performed immediately after the impacted teeth were extracted. RESULTS: The external root resorption of the affected tooth was ceased. It was asymptomatic with intact crown, normal pulp, periapical alveolar bone reconstruction, normal periodontal ligament, continuous bone sclerosis, and no periapical translucency in radiographic examination at the 1-year postoperative follow-up, thus showing good prognosis. CONCLUSIONS Simultaneous combination of micro-apical surgery and vital pulp therapy after extraction of impacted teeth could successfully preserve mandibular second molars with ERR caused by impacted teeth and their vital pulps.
Humans ; Tooth, Impacted/surgery* ; Molar ; Mandible ; Dental Pulp ; Root Canal Therapy ; Root Resorption/etiology* ; Tooth Extraction

Children in the mixed dentition grow rapidly, and various types of malocclusion often appear in this period. At the same time, there are many environmental factors affecting the development of the occlusion at this stage. Functional abnormalities related to lip, tongue, articulation and breathing, and impacted teeth should be actively intervened and blocked to avoid the continued development of the deformity. Appropriate orthopedic devices should be used in patients with skeletal malocclusion, if necessary, for growth modification and the influence of congenital factors and the prognosis of treatment should be fully evaluated. Over-intervention of the temporary malocclusions in the mixed dentition should be avoided. In conclusion, early orthodontic treatment in the mixed dentition requires a comprehensive assessment of the treatment need, risks, timing, cost and the ultimate benefit of the patient. The timing of orthodontic treatment is not the sooner the better. The indications must be strictly controlled, and the necessity and limitations must be carefully considered.
Child ; Dentition, Mixed ; Humans ; Malocclusion/therapy* ; Tongue ; Tongue Habits ; Tooth, Impacted

Child ; Humans ; Incisor ; abnormalities ; Maxilla ; Occlusal Adjustment ; Orthodontic Extrusion ; Tooth Abnormalities ; diagnosis ; etiology ; therapy ; Tooth, Impacted ; diagnosis ; etiology ; therapy

OBJECTIVETo evaluate the effect of autotransplantation of impacted anterior tooth and premolar.

METHODSNineteen teeth of 19 patients were made autotransplantation. Fifteen impacted anterior teeth were transplanted to their normal positions. Four premolars were transplanted into missing anterior spaces. Four weeks after surgical procedure, root canal therapy was underwent. Clinical and radiographic examintation of 19 transplanted teeth were carried out after 18-months to 5-years.

RESULTSNineteen teeth were stable with no sign of inflammatory resorption or periapical lesion.

CONCLUSIONAutotransplantation may be a better treatment method to impacted tooth and missing anterior when they can't be treated by orthodontic method.

Bicuspid ; Female ; Follow-Up Studies ; Humans ; Male ; Molar ; Root Canal Therapy ; Tooth ; Tooth Root ; Tooth, Impacted ; Transplantation, Autologous

OBJECTIVETo investigate the frequency, sex differences and location of impacted maxillary canine in orthodontic patients.

METHODSTwo hundred and fifteen patients (77 males and 138 females) with maxillary canine impaction were included in the study. The experimental group was gathered from the Department of Orthodontics, Peking University School and Hospital of Stomatology. CT scan images were evaluated. Chi-square test was used in the analysis.

RESULTSThe prevalence of maxillary canine impaction among Chinese orthodontic patients was 2.05%. The ratio between male and female was 1.8:1 and the ratio between buccal and palatal location was 2.1:1. Surgical exposure and orthodontic alignment had been predominant in such conditions. There was significant deference in the treatment between palatally impacted canine and buccally impacted one. More palatally impacted canines were extracted than buccally impacted ones.

CONCLUSIONSThere was significant difference in the treatment of maxillary canine impaction. More buccally impacted canines were found in Chinese patients, especially in female patients.

Adolescent ; Adult ; Child ; Cuspid ; pathology ; Female ; Humans ; Male ; Maxilla ; Orthodontics, Corrective ; Sex Factors ; Tooth, Impacted ; epidemiology ; therapy ; Young Adult

OBJECTIVETo assess the treatment method and outcome of mesially or horizontally impacted mandibular molars.

METHODSEleven patients with mandibular impacted molars, including 9 horizontally impacted molars and 5 mesially impacted molars were treated with fixed appliance in conjunction with molar band soldered with pushing spring. Crowns of impacted molars were moved occlusally and distally.

RESULTSAll mesially or horizontally mandibular impacted molars were uprighted and brought into occlusion. Mean treatment period was 7.4 months (6 to 12 months).

CONCLUSIONSThis orthodontic molar uprighting technique was effective in uprighting and distalizing the impacted molars.

Adolescent ; Adult ; Female ; Humans ; Male ; Molar ; pathology ; physiology ; Orthodontic Appliances ; Orthodontics, Corrective ; methods ; Tooth, Impacted ; therapy ; Young Adult

Child ; Child, Preschool ; Dentition, Mixed ; Humans ; Radiography, Panoramic ; Tooth Extraction ; Tooth Migration ; therapy ; Tooth, Impacted ; therapy ; Tooth, Supernumerary ; diagnostic imaging ; pathology ; surgery

This report details a case of 8-year-old girl showing failure of odontogenesis after chemo-radiation therapy for rhabdomysarcoma at the age of 4. The observed results were as follows ; 1. Past history revealed that she had received for a total radiation dose od 4430cGy, 29 fractions in 6 weeks and chemotherapy with vincristine, actinomycin D and cytoxan, followed as maintenance phase for 2 years. 2. The patient was symptom-free and appointed for the treatment of multiple dental caries. 3. Oral examination showed hypoplastic enamel on whole erupted permanent teeth and showed retarded eruption. 4. Conventional radiograms showed failure of root development including abrupt cessation of root formation and root agenesis, and microdobtia, missing teeth, irregular enamel, dislocation of the impacted teeth. Additional finding showed good healing bone pattern on the left mandibular ramus and angle area. 5. Cehalometric analysis revealed failure of bite raising due to incomplete eruption of all the first molars and made it possible to suspect entrapped mandibular growth and then Class II tendency growth. 6. There was correlation between the time of chemo-radiation therapy and the damage of the teeth.
Child ; Cyclophosphamide ; Dactinomycin ; Dental Caries ; Dental Enamel ; Dental Enamel Hypoplasia ; Diagnosis, Oral ; Dislocations ; Drug Therapy ; Female ; Humans ; Molar ; Odontogenesis* ; Rhabdomyosarcoma* ; Tooth ; Tooth, Impacted ; Vincristine