جستجوی مقالات مرتبط با کلیدواژه "impacted" در نشریات گروه "پزشکی"

Statement of the Problem:

 Conventional injection technique with adrenaline during removal of impacted third molar of mandible had proportionally increased pain during administration with slow onset of action and shorter duration of anesthesia.  

The purpose of this study was to compare the effective nature of 8.4% and 7.5% buffered lidocaine hydrochloride during surgical removal of mandibular impacted third molar.

This prospective crossover study included 50 patients requiring bilateral removal of impacted mandibular third molars. Group I included 50 impacted mandibular third molars that were administered with 8.4% buffered lidocaine hydrochloride and group II included 50 impacted mandibular third molars were administered with 7.5% buffered lidocaine hydrochloride. The outcome variables were pain on injection, time of onset of anesthesia, and duration of action of anesthesia. The above parameters were recorded by the investigator and statistically analyzed through Chi-square test using SPSS software.

Patients in group I had mild pain (1.02) and patients in group II (5.74) had moderate pain with a statistical significance of p< 0.05 for group I respectively. The mean onset of action of anesthesia in group I was 0.08 seconds and 0.59 seconds in group II (p< 0.05). The duration of anesthesia was 342.51 minutes from group I and 122.06 minutes in group II (p< 0.05) respectively.

Lidocaine hydrochloride buffered with 8.4 % sodium bicarbonate was found to be more effective in reduction of pain during injection, also had a faster onset of action and longer duration of the action of anesthesia when compared to 7.5% buffered lidocaine hydrochloride.

Canine teeth have a significant impact on the order and proper function of other teeth. Canine impaction can have negative esthetic and functional effects. This study investigated the success rate of orthodontically-assisted eruption of maxillary canine teeth according to age, sex, and type of impaction in Shahrekord city, Iran.

In this retrospective study, panoramic radiographs of 112 patients who had initiated their orthodontic treatment at least 2 years earlier and had completed it by 2023 were evaluated. Cone-beam computed tomography scans were also used when necessary to assess the details. The type, depth, and angle of erupted and impacted canine teeth were determined. The data were analyzed by the Fisher's exact test and t-test.

Impacted canines successfully erupted in 72 patients (64.3%). Palatal impaction was more common (71.4%) than buccal impaction (28.6%). Regarding the impaction depth, type C had the highest frequency (63.4%), followed by type B (30.4%), and type A (6.3%). There was no significant correlation between the gender of patients and success rate of assisted eruption (P>0.05), but age and type of impaction were correlated with the success rate (P<0.05). The erupted canine teeth had a significantly higher mean angle relative to the occlusal plane compared with non-erupted teeth (P<0.05).

The success rate of orthodontically-assisted eruption of impacted maxillary canine teeth was high, and patients in the age range of 15 to 18 years with grade II impaction showed the highest success rate of orthodontically-assisted eruption of impacted canine teeth.

Third molar teeth usually erupt during the late adolescence or early adulthood and may cause various dental problems, such as impaction or overcrowding, if they do not erupt properly. This study aimed to explore the relationship between third molar impaction, and extraction, and to evaluate the impact of awareness about the associated potential risks and benefits on post-extraction complications.

A cross-sectional study was conducted at Baghdad College of Dentistry, targeting undergraduate dental students. A questionnaire was sent to 333 dental students. The collected data were then analyzed using SPSS version 27. The Spearman and Kendall's tau rank correlation coefficients were used to measure the strength and direction of the relationship among the variables.   

Third molar impaction was more common in individuals aged 19 to 21 years. A significant correlation was found between the age of onset of symptoms related to third molars and the occurrence of impaction (P=0.006, correlation coefficient=0.144). Also, a significant correlation existed between age and extraction of impacted third molars (P=0.01, correlation coefficient= 0.268). The linear regression R2 value indicated that 14.1% of the reduction in complications was attributed to the level of awareness regarding the associated potential risks and benefits.

This study highlighted the high prevalence of third molar impaction in young adults and the importance of its early detection and intervention. The findings underscored the significance of age and awareness in predicting and managing complications associated with impacted third molars.

We aimed to evaluate the morphology of maxilla and sinus dimension in subjects with unilaterally and bilaterally impacted canine using cone beam computed tomography (CBCT) records.

CBCT records taken during 2020-2022 of 120 patients were obtained to investigate the relationship between impacted canine and maxilla morphology as well as sinus dimension. The CBCT images were then divided into three control, unilaterally and bilaterally canine impaction groups. Then morphology-related variables (arch circumference and arch length , inter molar width, inter first molar width, palatal depth, anterior posterior of right and left side sinus, and mediolateral dimension of right and left side sinus)  were analyzed and compared between groups. All measurements was measured by Ondeman3D dental software, the unit of measurement was millimeter. Statistical analysis was carried out by SPSS software version 21 using one-way ANOVA and post hoc tests.

In patients with canine impaction (compared with control group), there were meaningful differences in arch circumference (P value= 0.004) and arch length (P value= 0.001), inter molar width (P value= 0.001), inter first premolar width (P value= 0.001), mediolateral dimension of right (P value=0.001) and left side (P value= 0.001) sinus of maxilla. Furthermore, Palatal depth and anterior posterior of right and left sinuses were not statistically significant difference between groups.

Canine impaction can considerably affect the morphology of maxillary and sinuses dimension. Nevertheless, future studies are needed to determine the exact structural and molecular effects that canine impaction can have on maxillary sinuses and neighboring tissues.

Odontogenic lesions related to impacted teeth are common findings in routine dental exams, with the potential to cause tooth pain, displacement, bone expansion, or even bone erosion. Thus, their early detection is important. This study aimed to evaluate the frequency of such lesions based on patient age, gender, and location at the Tehran University of Medical Sciences, School of Dentistry, over five years.

This retrospective study evaluated records from the oral pathology department, covering a five-year period. The association of odontogenic lesions with impacted teeth was assessed. Data on lesion type, patient age and gender, involved jaw, lesion location, and affected teeth were extracted from patient records. Statistical analysis was performed using SPSS 24.

Out of 815 odontogenic lesions, 44.4% were associated with impacted teeth. The patient distribution was 52.48% male and 47.52% female. Lesions were most prevalent in the third decade of life (24.58%), and third molars (59.39%) were frequently involved. The posterior mandible (68.5%) and mandibular third molar (55%) were common sites. Dentigerous cysts had the highest frequency (35.4%), with odontogenic cysts (developmental) occurring more frequently (70.7%) than odontogenic tumors.

The study underscores a significant association between odontogenic lesions and impacted or unerupted teeth. Periodic follow-ups are crucial for retaining impacted teeth based on these findings.

The adenomatoid odontogenic tumor (AOT) is a rare benign neoplasm that is typically treated through surgical enucleation and curettage. Any impacted tooth associated with the tumor are also extracted during the procedure. We present a case of AOT encompassing an impacted left maxillary central incisor in a 13-year-old male. The patient underwent routine treatment, but the tooth was orthodontically extruded using traction. Within two years, the incisor successfully attained its functional position in the arch, without any signs of recurrence. Preserving an impacted tooth associated with AOT is not common, and only a few cases have been reported in the literature. It is important to manage AOT conservatively and to save the associated tooth for both functional and aesthetic purposes. Long-term follow-up is crucial to monitor any potential recurrence. In summary, our case highlights the successful orthodontic management and preservation of an impacted tooth in a teenager with AOT.

Odontomas are the most common type of odontogenic tumors of the oral cavity and are described as one of the contributing factors to tooth impaction. The impaction of the maxillary incisors causes several esthetic and functional problems. A multidisciplinary approach is required for proper planning, surgical pro-cedure, and orthodontic traction of the impacted tooth.

The aim of this case report is to present a clinical case of a 10-year-old female patient with the chief compliant of absence of the upper right per-manent central incisor. Radiographic examination revealed that over-retention of the right central incisor was associated with a mixed lesion showing tooth-like structures. The lesion, which was characterized as compound odontoma, was surgically removed. Because of the deep position of the impacted tooth, surgical exposure and orthodontic traction were planned after 10 months of watchful waiting.

Combined surgical and orthodontic treatments are recommended for impacted maxillary central incisors associated with odontoma.

The formation of localized periodontal pockets on the distal surface of adjacent molars is known as one of the asymptomatic lesions associated with impacted wisdom teeth. In this study, the effect of different factors on the prevention of periodontal pocket formation on the distal surface of the second molar following impacted wisdom tooth removal surgery was investigated.

The present study was a review of the related literature published over the last 10 years. The main tool recruited for this purpose was a researcher-made checklist, developed based on the main objectives of the study. Accordingly, wisdom tooth occlusion, suture technique, flap type, and periodontal envelope, extracted from the articles, were recorded in the relevant checklist. The extracted information was finally imported into the SPSS (ver. 20) software package and analyzed, using descriptive and analytical statistics.

In total, 22 articles, reflecting on the effect of different factors on the prevention of periodontal pocket formation on the distal surface of the second molar following impacted wisdom tooth removal surgery, and meeting the inclusion criteria in this study were retrieved and then reviewed. Based on the preliminary analyses, 15 articles (68.18%) had mentioned periodontal pocket formation after impacted tooth surgery. As well, nine studies had referred to attachment loss in patients. In this review using surveys among patients undergoing surgery, had not demonstrated a significant relationship between periodontal pocket formation and attachment loss. Moreover, eight articles (36.36%) examined flap type employed during the surgery.

It was concluded that impacted wisdom tooth removal surgery had been thus far introduced directly in many studies as a factor affecting the reduction of periodontal complications, including periodontal pocket formation in adjacent teeth.

This study sought to assess the frequency and severity of second molar external root resorption (ERR) due to the adjacent third molar and its correlation with the position of third molar and other related factors using cone-beam computed tomography (CBCT).

This cross-sectional study evaluated 320 second molars and their adjacent impacted third molars on CBCT scans of patients over 16 years, retrieved from the archives of Azad University Radiology Department. Presence/absence of second molar ERR, its location and severity (if present), and position of adjacent third molar were determined on CBCT scans, and recorded in a checklist. Data were analyzed using a logistic regression model.

The frequency of second molar ERR was 33.4% in the mandible and 14% in the maxilla. The severity of ERR was significantly correlated with the involved jaw (P=0.001) but had no correlation with age, gender, or depth of impaction of adjacent third molar (P>0.05). The mesioangular and horizontal positions of impacted third molars had a significant correlation with the frequency of second molar ERR (P<0.006).

According to the results of this study, ERR occurring in second molars adjacent to third molars is common, especially in the mandible. Mesially inclined third molars have a greater potential of being associated with ERR in second molars.

Impaction of the anterior teeth, which is less frequent in central incisors, can cause serious esthetic and subsequent psychological problems for patients during the mixed dentition period. Traumatic injury to deciduous teeth is the most common etiologic factor. Thus, treatment of maxillary incisor impaction is highly important. Nowadays, application of laser has been suggested in orthodontics and pediatric dentistry for different treatments, such as surgical exposure of impacted teeth and application of low-level laser therapy (LLLT) for acceleration of orthodontic tooth movement. In this paper, the authors present treatment of an impacted and dilacerated maxillary central incisor with laser application for its surgical exposure and LLLT for acceleration of its orthodontic traction and eruption.

Association of cuspid impaction with adjacent lateral incisor anomalies is under controversy. The aim of this study was to investigate the correlation between maxillary cuspid impaction with dental anomalies.

In this in vitro experimental study, the material consisted of pretreatment dental records of 102 patients with at least one palatally or buccally displaced impacted permanent cuspid (palatal and buccal impaction groups). They were matched with a comparison control group of 102 patients having normally erupted maxillary cuspids. Available space, mesiodistal dimensions of teeth, and morphologic parameters of lateral incisors were measured using the digital caliper. Comparison of mean values of lateral incisors anomalies and severity of crowding between different groups were performed using the one‑way ANOVA test, and the analysis of associations between position of the impaction and anomaly of the lateral incisors and severity of crowding was performed using the Chi‑square test. P < 0.05 was considered statistically significant.

There was no statistically significant difference in the arch length–tooth size discrepancy between the cuspid impaction groups and control group. The impaction group (buccal or palatal) presented statistically significant differences in terms of anomalies of maxillary lateral incisor compared to the control group. Peg‑shaped lateral incisor was related to buccal cuspid impaction and microdontia had relationship with palatal cuspid impaction.

There is the relationship between cuspid impaction and adjacent lateral incisor abnormality, but no difference was observed between buccal and palatal cuspid impactions. Crowding revealed no relationship with cuspid impaction (buccal or palatal) in this study

The calcifying odontogenic cyst (COC) is a rare cystic lesion, mainly affecting the anterior aspect of the jaws. It is usually discovered in unexpected settings and can be clinically observed as a painless and well-defined lesion. The COC may be associated with other odontogenic tumors, such as odontomas. Nearly 50% of COCs are associated with an unerupted tooth, most often a canine. The most unique features of this pathology are histopathological features, including a cystic lining with characteristic ghost epithelial cells with a tendency for calcification. Radiological examinations often reveal a radiolucent and unilocular lesion, sometimes associated with radiopaque lesions. Pathological assessments are required for the final diagnosis. Management is through complete excision with annual radiographic monitoring for five years.

Here, we report a classic case of COC in the left mandibular region associated with an extremely displaced impacted canine in a 16-year-old girl.

Although uncommon, COCs are frequently associated with impacted teeth. The radiolucencies associated with impacted teeth have different effects on the surrounding structures and require different treatment plans, depending on the type of the lesion.

 The removal of a third molar tooth associated with a pathological condition is usually an easy decision. However, it is necessary for clinicians to know about the prevalence of preoperative pathologies associated with impacted mandibular third molars to the identification of the prophylactic approach to be applied to symptom-free impacted third molars. The objective was to investigate the effect of the angulation of impacted mandibular third molars on the prevalence of associated pathologies. In this retrospective study, we examined the panoramic radiographs of 954 patients referred for impacted third molar surgery. A total of 1598 impacted mandibular third molar teeth were included in the study. Pathological conditions included the caries on distal surface of the adjacent second molar, caries on impacted mandibular third molars, bone loss distal to the adjacent second molar, the radiolucent area distal to the impacted mandibular third molar were determined. Caries were observed more in the impacted third molar (18.9%) compared to the adjacent second molar (15.8%). The radiolucent area on distal surface of the impacted mandibular molar was 11%, while the periodontal bone loss distal to the adjacent second molar was 4.9%. Mesioangular-impacted mandibular third molars had high risk of caries development on second and third molar. The prevalence of periodontal tissue damage to the adjacent second molar was higher in horizontal and mesioangular angulation. Vertical and distoangular-impacted mandibular third molars had high risk for bone loss at distal aspect. The prevalence rate of pathological conditions in mesioangular impacted teeth was higher.

With the exception of the third molar, maxillary canine impaction is considered to be the most common form of tooth impaction. The position of the permanent maxillary canine at the angle of the mouth is strategically important in preserving the harmony and symmetry of the dental arches. The incidence of maxillary canine impaction in the maxilla is more than twice higher compared to the mandible. Approximately one-thirds of the cases are labially located, and two-thirds are palatally located. Bilateral impaction has been reported in 8% of the patients with canine impaction. The treatment procedure is time-consuming and imposes a significant financial burden on the patient. Impacted maxillary canines could be erupted and guided to an appropriate location in the dental arch with early detection, timely interception, and proper surgical management in order to perform orthodontic treatment. Various surgical and orthodontic techniques could be used to guide impacted canines into the arch. Accurate selection of surgical and orthodontic techniques is essential to the successful alignment of impacted teeth. Management of impacted tooth often requires an interdisciplinary approach. In addition, proper cooperation of the orthodontist, oral surgeon, and periodontist seems crucial in this process. The present study aimed to review the clinical and practical aspects required for the management of maxillary canine impaction based on the location and age of the impaction.

Mechanical trauma or developmental disorders can cause an eruptive problem mostly called dilaceration. The prognosis of a dilacerated tooth depends on early diagnosis and appropriate treatment planning. The case presented in this paper is an example of severe dilacerations of a maxillary central incisor which has been treated with early orthodontic intervention.

This study aimed to compare the efficacy of panoramic radiography and the buccal object rule in intraoral periapical radiography for localization of impacted maxillary canine teeth.
A total of 20 panoramic radiographs depicting 28 displaced maxillary canines were evaluated. The ratio of the mesiodistal width of the impacted canine to the mesiodistal width of the ipsilateral central incisor was calculated and referred to as the canine-incisor index (CII). The height of the crown of each displaced canine was classified in vertical plane relative to the adjacent incisor as apical, middle or coronal. Position of impacted maxillary canines was also determined on two periapical radiographs using the buccal object rule. Surgical exposure and direct observation of impacted teeth were later performed and served as the gold standard. The data were analyzed using SPSS and t-test.
There was an overlap in the CII range of the buccally (0.78-1.48) and palatally (1.15-1.75) positioned impacted canines. When considering the height factor in the middle and coronal zones, a significant difference was noted between the CII of buccally (0.78-1.1) and palatally (1.15-1.75) positioned teeth enabling determination of their buccolingual orientation (P For the impacted maxillary canines located in the middle and coronal zones (90% of cases), the CII of 1.15 and higher represents palatal impaction while the CII smaller than 1.15 represents buccal impaction.

Impaction of maxillary central incisors is not common. Treatment of an impacted central incisor is challenging as it relates to facial esthetics and dental function.
Although impaction of permanent teeth is rarely diagnosed in mixed dentition period, an impacted central incisor is usually diagnosed when there is a delay in the eruption of tooth.
Tooth impaction may result from a number of local etiological factors such as lack of space for eruption, presence of supernumerary teeth, disturbances in the path of eruption and presence of pathological cysts. Management options for such teeth include (1) surgical extraction and moving the lateral incisor to replace the central incisor and changing the anatomy of other teeth, (2) extraction of the impacted tooth followed by bridge or implant placement, (3) surgical repositioning of the impacted tooth, and (4) orthodontic correction of the impacted tooth.
The purpose of this article was to describe surgical exposure and orthodontic treatment of a horizontally impacted permanent maxillary central incisor, parallel to the occlusal plane in a 9-year-old girl. The impacted tooth was surgically exposed and traction was done with orthodontic intervention.
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