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 ;

impacted tooth. In such instances, the radiographic features simulate those of a dentigerous cyst. The purpose of this study was to evaluate a comparative immunohistochemical expression of Ki-67 as a proliferative marker in the OKC associated with or without impacted tooth. In addition, we have also been investigated with regard to the proliferative activity comparing the unilocular and multilocular varieties of the OKC. The material for this study consisted of thirty-two cases of OKCs (OKC with impacted tooth, n=16; OKC without impacted tooth, n=16) and ten cases of dentigerous cysts as a comparison. The results revealed that the proliferative activity of OKCs with impacted tooth was higher than those of dentigerous cysts. However, there was no correlation between Ki-67 immunoreactivity and association with or without impacted tooth in 32 cases of OKCs. In addition, this present study showed that there was no correlation between the unilocular and multilocular varieties of the OKCs in proliferative activity.]]>
Dentigerous Cyst ; Tooth, Impacted

impacted supernumerary teeth and permanent teeth together. Therefore we report the case of immediate implantation following extraction of impacted supernumerary teeth and poor periodontal conditioned permanent teeth.]]>
Tooth ; Tooth, Deciduous ; Tooth, Impacted ; Tooth, Supernumerary

Impacted teeth are a frequent phenomenon encountered by every clinician. The artificial eruption of embedded teeth is the process of directing an impacted tooth into normal occlusion. This procedure is currently attracting attention, with the aim of finding the best technique to use according to each case. This article presents key information regarding impacted incisors, canines, and premolars. In addition, we describe the most common techniques to use for artificial eruption, the open and closed techniques. We review the literature concerning these techniques and outline how clinicians can manage every type of impacted tooth.
Bicuspid ; Incisor ; Surgery, Oral ; Tooth ; Tooth, Impacted

Treatment options for impacted permanent molars include orthodontic traction, surgical repositioning, transplantation, and extraction of the impacted teeth. Orthodontic traction is recommended because it is the most conservative method. However, it has limitations, such as loss of tooth anchorage. In an effort to overcome these limitations, skeletal anchorage devices tailored for orthodontic use were developed. In this case report, 3 patients were diagnosed with impacted permanent molars. The impacted teeth of these patients were surgically exposed, the orthodontic devices were attached, and the skeletal anchorage devices were implanted for the successful traction of the impacted teeth.
Humans ; Methods ; Molar ; Tooth ; Tooth, Impacted ; Traction

ABSTRACT Localisation of impacted teeth is essential for surgical and orthodontic management. The study objective was to evaluate the prevalence and type of tooth impaction in the jaws using cone beam computed tomography (CBCT). The CBCT records of subjects between 2018 and 2020 were retrieved from our institution archives and examined by two oral radiologists. A total of 760 CBCT scans were evaluated, of which 140 (18.4%) scans had impacted teeth. From the 140 CBCT scans, 216 impacted teeth were identified. Maximum impactions were in the age group of 21–30 years. Third molars were the most commonly impacted teeth (66.2%), followed by canines (23.6%), supernumerary teeth (4.6%), premolars (3.2%), incisors (1.4%), and second molars (0.9%). Among the impacted canines, 53% were buccally impacted, 43% were palatally impacted and other impactions were 4%. Among the third molars, mesioangular impactions were the most frequent (41.2%), followed by horizontal (28%), vertical (16.7%) and distoangular impaction (4.1%). The most frequently impacted teeth were the third molars, followed by canines. Canine impactions were more frequent in the maxilla, while third molar impactions were thrice as common in the mandible compared to the maxilla. Mesioangular third molar impactions were the commonest, followed by horizontal, vertical and distoangular.
Cone-Beam Computed Tomography ; Tooth, Impacted

OBJECTIVE: To evaluate the effects of contamination by either blood or a hemostatic agent on the shear bond strength (SBS) of orthodontic buttons. METHODS: We used 45 freshly extracted, non-carious, impacted third molars that were divided into 3 groups of 15. Each tooth was etched with 37% phosphoric acid gel for 30 s. Human blood or the blood stopper agent was applied to the tooth surface in groups I and II, respectively. Group III teeth were untreated (controls). Orthodontic buttons were bonded to the teeth using light-curing composite resin. After bonding, the SBS of the button was determined using a Universal testing machine. Any adhesive remaining after debonding was assessed and scored according to the modified adhesive remnant index (ARI). ANOVA with post-hoc Tukey's test was used to determine significant differences in SBS and Fisher's exact test, to determine significant differences in ARI scores among groups. RESULTS: ANOVA indicated a significant difference between groups (p < 0.001). The highest SBS values were measured in group III (10.73 +/- 0.96 MPa). The SBS values for teeth in groups I and II were significantly lower than that of group III (p < 0.001). The lowest SBS values were observed in group I teeth (4.17 +/- 1.11 MPa) (p < 0.001). CONCLUSIONS: Contamination of tooth surfaces with either blood or hemostatic agent significantly decreased the SBS of orthodontic buttons. When the contamination risk is high, it is recommended to use the blood stopper agent when bonding orthodontic buttons on impacted teeth.
Adhesives ; Collodion ; Humans ; Molar, Third ; Phosphoric Acids ; Tooth ; Tooth, Impacted

OBJECTIVE: To evaluate the effects of contamination by either blood or a hemostatic agent on the shear bond strength (SBS) of orthodontic buttons. METHODS: We used 45 freshly extracted, non-carious, impacted third molars that were divided into 3 groups of 15. Each tooth was etched with 37% phosphoric acid gel for 30 s. Human blood or the blood stopper agent was applied to the tooth surface in groups I and II, respectively. Group III teeth were untreated (controls). Orthodontic buttons were bonded to the teeth using light-curing composite resin. After bonding, the SBS of the button was determined using a Universal testing machine. Any adhesive remaining after debonding was assessed and scored according to the modified adhesive remnant index (ARI). ANOVA with post-hoc Tukey's test was used to determine significant differences in SBS and Fisher's exact test, to determine significant differences in ARI scores among groups. RESULTS: ANOVA indicated a significant difference between groups (p < 0.001). The highest SBS values were measured in group III (10.73 +/- 0.96 MPa). The SBS values for teeth in groups I and II were significantly lower than that of group III (p < 0.001). The lowest SBS values were observed in group I teeth (4.17 +/- 1.11 MPa) (p < 0.001). CONCLUSIONS: Contamination of tooth surfaces with either blood or hemostatic agent significantly decreased the SBS of orthodontic buttons. When the contamination risk is high, it is recommended to use the blood stopper agent when bonding orthodontic buttons on impacted teeth.
Adhesives ; Collodion ; Humans ; Molar, Third ; Phosphoric Acids ; Tooth ; Tooth, Impacted

PURPOSE: To evaluate the use of the vertical tube shift from a panoramic film and a periapical film to localize unerupted maxillary incisors and supernumeraries. MATERIALS AND METHODS: The total of 103 displaced maxillary incisors or embedded supernumeraries were examined in this study. The vertical tube shift technique with panoramic and periapical radiography by normal projection taken and compared to localize the position of the embedded maxillary incisors or supernumeraries by a radiologist and 5 general dentists. The gold standard used for the radiographic comparisons was the true position of the embedded tooth as confirmed by horizontal tube shift technique using three periapical radiographs. The general dentist examiners were instructed on the use of the modified acronym "SLDOBU" by the radiologist as it pertains to panoramic radiographs as the principle of vertical tube shift. RESULTS: All of the embedded maxillary incisors and supernumeraries were successfully located using the vertical tube shift from a panoramic and a maxillary anterior periapical radiograph by the radiologist and 5 general dentists. CONCLUSION: The use of a panoramic film with a periapical film combination for a vertical tube shift can be useful to localize unerupted maxillary incisors and supernumeraries.
Dentists ; Humans ; Incisor* ; Maxilla ; Radiography ; Radiography, Panoramic ; Tooth ; Tooth, Impacted

Transmigration of an impacted tooth through the symphyseal suture is a rare and special developmental anomaly of unknown etiology that is unique to the mandibular canine. Maxillary canine transmigration is even rarer. Transmigrated canines are particularly significant due to the aesthetic and functional importance. A maxillary lateral incisor crossing the mid-palatal suture has never been reported in the literature. The aim of this report is to present the first case of simultaneous transmigration of a lateral incisor and canine in the maxilla. The paper also reports four unusual cases of unilateral canine transmigration in the maxilla and mandible and successful eruption of one of the transmigrated mandibular canines following orthodontic traction. Etiology of transmigration and its clinical considerations are also discussed.
Cuspid ; Incisor ; Mandible ; Maxilla ; Sutures ; Tooth Migration ; Tooth, Impacted ; Traction