• Journal of the korean academy of Pediatric Dentistry
• /
• v.32 no.1
• /
• pp.33-39
• /
• 2005

The impacted maxillary canine is a common problem of which all dental practitioners should be aware. The surgical orthodontic treatment of impacted canines is replaced correction position in dental arch without periodontal damage. Many treatment possibilities have been considered for this goal; window procedure, apically positioned flap, closed eruption technique and tunnel traction. Prognosis for these treatment may be very uncertain in many case(infraosseous impacted tooth). Other steps are required to achieve a satisfactory periodontal outcome. Satisfactory results could be expected if the physiologic eruption pattern is restored by tunnel traction, because permanent tooth erupts through the gingiva near the crest of the ridge so that periodontal damage is reduced. This article report that the surgical orthodontic treatment using tunnel traction is obtained proper position and reduced periodontal damage in facially impacted maxillary canines.

• Journal of Dental Rehabilitation and Applied Science
• /
• v.40 no.2
• /
• pp.100-106
• /
• 2024

Early interceptive orthodontic interventions are often started in the developing dentition to guide normal occlusion. The simplest way to prevent eruption failure from deciduous tooth loss is to fix a space maintainer such as a band and loop. Band and loop space maintainer has several problems like cement loss, demineralization, locking of the adjacent tooth, and needs to take a pickup impression of the band. Computer-assisted design/computer-assisted manufacturing (CAD/CAM) space maintainer without band was developed to solve these problems. This case report describes successful eruption of the mandibular second premolar using CAD/CAM without a band.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.33 no.2
• /
• pp.290-303
• /
• 2006

Tooth eruption is a complex and tightly regulated process that involves cells of the tooth organ and the surrounding alveolus. Osteoclast precursors must be recruited into the dental follicle prior to the onset of eruption. This function of dental follicle may be regarded as the ability of bone remodeling characterized by the interaction of osteoclasts and osteoblasts. This is because tooth eruption is a localized event in which many of the genes required for eruption are expressed in the dental follicle. RANKL is a membrane-bound protein that is a member of the TNF ligand family. which is present on bone marrow stromal cells and osteoblasts, and induces osteoclast formation and activation from precursor cell. The biologic effect of RANKL is inhibited by OPG and, in bone, the relative ratio of RANKL and OPG modulates osteoclastogenesis. To evaluate the roles of RANKL and OPG in tooth eruption and the relations with the expression pattern of Runx2, in situ hybridization was performed with mandibles of mice at postnatal stage 1, 3, 5, 7, 9 and 11. mRNA of RANKL, OPG, and Runx2 are expressed in dental follicle and surrounding tissue from P1 to 11. To determine the sites of osteoclastic activity during tooth eruption, mandibles were dissected. Peak osteoclastic activity in alveolar bone along the occlusal and basal regions was observed from P5 to 9, with osteoclasts in these regions being large and strongly TRAP-positive The specific spatio-temporal expression patterns of RANKL, OPG, and Runx2 in our study suggest that tooth eruption could be progressed through the interactions of molecular signaling among dental follicle, dental organ and alveolar bone, furthermore it means that dental follicle is quite important in tooth eruption In addition, it indicates that these genes (RANKL, OPG, and Runx2) play critical roles in tooth eruption.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.30 no.3
• /
• pp.489-494
• /
• 2003

Odontomas are the common type of odontogenic tumors and generally they are asymptomatic, depending upon size, location and their limited growth potential. they are rarely diagnosed before the second decade of life, and the frequently lead to impaction or delayed eruption of permanent teeth. Odontomas are classified of compound as compound or complex by morphology. Complex odontomas are unorganized masses of odontogenic tissues, morphologically not resembling the teeth, account for approximately 25 percent of all odontomas, 22 percent of odontogenic tumor of the jaws, and have a predilection for the posterior mandible in males. The etiology of odontomas is unknown, although local trauma, infection, and genetic factors have been suggested. Usually, treatment of odontoma is conservative sugical removal and their is little probability of recurrence. This paper describes two cases of complex odontomas diagnosed in children due to impaction of maxillary first molar in all cases, the surgical excision of the lesions was performed. Follow-up after 2 years, showed spontaneous eruption of the first permanent molar to the occlusal plane.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.30 no.2
• /
• pp.326-333
• /
• 2003

The appropriate treatment for eruption guide of impacted teeth necessitates the formulation of a comprehensive treatment plan, which is dependent upon a number of factors such as the condition of the deciduous teeth, dental and skeletal relationship, dental age of the patient, willingness of the patient to undergo extensive dental treatment and financial considerations. If the etiology of the eruption disturbance has been identified, the elimination of the causes and various procedures can be used for eruption guide. Particularly the transplantation is a valuable alternative to extraction of impacted teeth, where surgical exposure and subsequent orthodontic realignment are difficult or impossible. This report present three cases of autotransplantation of impacted maxillary canine. As the result in these cases, atraumatic removal of donor tooth during operation is prerequisite to an optimal clinical result. Due to a high possibility of pulp necrosis, endodontic treatment of fully developed transplanted teeth should be undertaken. In complex case, autotransplantation can save time and less expensive than orthodontic forced eruption. Recipient socket should be prepared to a size that is slightly larger than the root of the donor tooth, and can be prepared with open or close procedure depends on root size of donor tooth and buccolingual width at transplantion site.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.39 no.4
• /
• pp.404-411
• /
• 2012

Tooth impaction is defined as a failure of tooth eruption resulting from the physical obstacles in the eruption path or the abnormal position of the tooth germ. Impaction of mandibular second molar is relatively rare, and it may incite pathologic conditions such as dental caries, periodontitis, or root resorption of adjacent first molar. Thus, early diagnosis and treatment is recommended. In the first case, a 10-year-old male patient, was treated by brass wire to separate the bilaterally impacted mandibular second molars. In the second case, a 12-year-old female patient, was treated with Humphrey appliance for impacted mandibular left second molar, which was detected during a periodical dental examination. In the third case, a 17-year-old female patient with impacted mandibular right second molar, was treated by uprighting spring with mini-implant anchorage around premolar area. In the last case, an 18-year-old male patient, was treated with mini-implant placed on the ramus of mandible connected to the orthodontic buttons bonded on impacted mandibular left second molar by elastic thread.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.30 no.3
• /
• pp.515-519
• /
• 2003

Supernumerary teeth are teeth added to the normal complement of teeth. They are most often found in the maxillary anterior region. Most supernumerary teeth in the maxillary anterior region have complications, such as impaction or malposition of permanent teeth, formation of diastema, cysts, and eruption into the nasal cavity or into the oral cavity. These complications have influence on deciding the treatment and its prognosis is depends on how these complications are treated. In clinical studies, it has been found that the removal of supernumerary teeth before the age of 5 years resulted in significant fewer eruption problems of the permanent tooth compared to removal at 7 years of age or later. However, such an early removal may leads to serious consequences of tooth development and behavioral management of patients. Therefore clinicians must consider complications of supernumerary tooth when deciding the time of removal. These cases report five-type of complication associated with supernumerary tooth such as diastema, delayed eruption, external root resorption, migration into nasal cavity and cyst formation.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.33 no.4
• /
• pp.717-721
• /
• 2006

Premature loss of maxillary primary incisors often results from early childhood caries (ECC), trauma. While space maintenance in the posterior region is an important consideration when there is early loss of primary molars, the anterior segment appears to be stable, even with the early loss of several incisors, once the primary canines erupt. However, collapse of anterior arch integrity is evident in cases where incisor teeth are in a crowded dentition prior to extraction or lost before the eruption of the primary canines. So, when early loss of maxillary primary incisors, the aim of restoration is esthetics, speech problem, oral habit such as tongue thrusting than space maintenance. This paper reports that the esthetic problem due to premature loss of maxillary incisors can be successfully resolved by soldered open-faced stainless steel crown.

• The Journal of Korea Assosiation for Disability and Oral Health
• /
• v.13 no.1
• /
• pp.6-13
• /
• 2017

Premolars show the greatest variation in development and eruption. The present case report identified characteristics of eruption of maxillary premolars with delayed development. Multiple maxillary premolars with delayed development were found to have a palatal ectopic eruption pattern, which was self-corrected through eruption guidance by extraction of preceding primary teeth at the stage of root development when eruption force was maximal. In addition, delayed eruption due to delayed development was substantially improved by eruption guidance. Early erupted premolars with less than 1/3 of root development were induced to have normal root development using stabilizing appliance. The maxillary premolars with delayed development reported in the present study showed no complications such as impaction, space loss by delayed eruption, or insufficient root development.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.34 no.4
• /
• pp.709-717
• /
• 2007

Impaction of maxillary incisor is rare than the third molar and canine, but its rate is higher than the other anterior teeth due to frequent mesiodens, trauma and variation of root formation (root dilaceration etc.). It is often observed in the dental age of about eight years and over. It will be occurred that the space loss, midline deviation and cyst formation due to the impaction of maxillary incisor. So it is important to evaluate the precise location of impacted tooth and to make appropriate treatment plan. Treatment would be surgical extraction or expectation for spontaneous eruption. If the impacted tooth has no pathologic change and development of the root is favorable, orthodontic traction is recommended for recovery of function and esthetics. In these cases, we performed orthodontic traction for the eruption of impacted maxillary incisors, and obtained satisfactory results.