Unerupted Permanent Teeth Research Articles

OrthoSystem: aplicativo de cálculo da análise da dentadura mista

Introdução A análise da dentadura mista é essencial no diagnóstico em Ortodontia, uma vez que estima o tamanho dos dentes permanentes não irrompidos e verifica se o volume dentário estará de acordo com o tamanho da base óssea. Atualmente, existem softwares que realizam análise de modelos em 2D e 3D. Entretanto, esses programas ainda possuem um custo elevado. Objetivo O objetivo deste estudo foi desenvolver um software (OrthoSystem), voltado para alunos de graduação e pós-graduação em Ortodontia, para efetuar a Análise de Modelos de Moyers. Método Para avaliação da acurácia e do tempo despendido, utilizaram-se 60 pares de modelos de estudo que foram submetidos à Análise de Moyers manual e com o software. Para testar a usabilidade do programa, foram aplicados questionários a 72 graduandos de Odontologia da Universidade Federal do Rio Grande do Norte (UFRN). Resultado O programa teve a acurácia validada, apresentando uma concordância perfeita (p=1) e um tempo de 4,20 minutos a menos para aferir a discrepância dos modelos em comparação com o método manual. Além disso, o OrthoSystem foi considerado de excelente usabilidade e melhor que o método convencional pelos alunos. Conclusão Pode-se inferir que o software OrthoSystem realiza o que se propõe a fazer de forma correta e foi considerado um programa de excelente usabilidade pelos graduandos em odontologia da UFRN.

Detection and imaging characteristics of the gubernacular tract in children on cone beam and multidetector computed tomography

To elucidate the appearance and imaging characteristics of the gubernacular tract (GT) during the growth stage of children. Furthermore, this study evaluated the significance of the appearance of the GT. The visualizations of the GT were retrospectively analyzed by using panoramic radiographs and computed tomography (CT) in children. In patients with normal eruption who had unerupted permanent teeth, except maxillary central supernumerary teeth, the GT was clearly visualized as a well-defined low-density tract on CT but not on panoramic radiographs. In patients with obstructive eruption, including impaction, the GT was deformed and not visible on CT. This paper describes the frequency of detection and appearance of the GT in unerupted teeth. Preliminary data suggest that any alteration to the GT may be used to predict abnormal eruption of permanent teeth.

Follicular adenomatoid odontogenic tumour in mandible - A Rare case report

Adenomatoid odontogenic tumour is an uncommon tumour of odontogenic origin with relative frequency of 2.2–7.1%. It is benign non invasive lesion with slow but progressive growth. As the histogenesis is still uncertain, it is sometimes regarded as hamartomatous lesion rather than a true neoplasm. Adenomatoid odontogenic tumour which accounts for 1% to 9% of all odontogenic tumours, is predominantly found in young and female patients, located more often in the anterior maxilla, and in most of the cases associated with unerupted permanent tooth. This report illustrates an unusual case of Adenomatoid odontogenic tumour seen in anterior mandible.

Cleidocranial dysplasia: Spectrum of clinical and radiological findings in seven cases

Introduction: Cleidocranial dysplasia (CCD) is an autosomal dominant disorder primarily affecting bones, which undergo membranous ossification. It commonly presents with significant dental and facial problems, including the hypoplastic maxilla, retained primary teeth, unerupted permanent teeth and supernumerary teeth. It is usually diagnosed based on clinical and radiographic findings, which are pathognomic. Here, we report clinical and radiographic findings of 7 patients with CCD who reported to our Institute during 2013-2014. Results: Age of patient ranged from 13 to 55 years, out of which 5 were males and 2 were females. Characteristic clinical findings, which were present in all cases include frontal and parietal bossing, brachycephalic skull, hypertelorism, broad nasal bridge and shoulder hypermobility. Radiographic findings seen were hypoplasia/aplasia of the clavicle, open skull suture, wide, open fontanel, and the presence of impacted permanent and supernumerary teeth. In one case, there was follicular cyst associated with impacted mandibular canine. Conclusion: Successful treatment involves a multidisciplinary approach and involves timely diagnosis at an early stage of development

Restoring function and esthetics in an adolescent with idiopathic multiple unerupted permanent teeth: A clinical report

Idiopathic multiple unerupted teeth have several debilitating oral and psychological manifestations, especially with young children and adolescents. The multiple unerupted permanent teeth can cause serious problems in terms of treatment time and outcome. This clinical report presents a multidisciplinary approach for the management of an adolescent girl with idiopathic multiple unerupted teeth. At the 2-year follow-up, there was a significant improvement in the oral function and psychosocial activities without any prosthetic complications. CLINICAL RELEVANCE TO INTERDISCIPLINARY DENTISTRY Interdisciplinary team including Prosthodontist, Restorative Dentist, Periodontist and an Oral Surgeon will help in significantly improving the quality of life of the patient Special emphasis is placed on early diagnosis, careful treatment planning, and co-.ordination and timing of different phases of the treatment A system for integrating all the specialities will be a guarantee for a successful outcome.

Adenomatoid Odontogenic Tumor in the Mandible: A Case Report

Adenomatoid odontogenic tumor (AOT) is a rare odontogenic tumor often misdiagnosed as odontogenic cyst. AOT is predominantly found in female patients, which usually arise in the second or third decade and is located more often in the maxilla than mandible and often associated with an unerupted permanent tooth. However, AOT frequently resembles other odontogenic lesions such as dentigerous cysts or ameloblastoma. Treatment is conservative and the prognosis is excellent. For illustration a rare case of an AOT in the mandible which is associated with an unerupted permanent canine is presented.

Evaluation and Applicability of Moyers Mixed Dentition Arch Analysis in Himachal Population

Abstract Introduction: The determination of a tooth-size to arch length discrepancy in mixed dentition requires an accurate prediction of the mesiodistal width of the unerupted permanent teeth. The Moyers mixed dentition space analysis is the non-radiographic method for detecting tooth-size arch length discrepancies. Moyers analysis was developed for North American children. Anthropological studies reveal that tooth size varies among different races and ethnicities. Aim: The present study was aimed to determine the applicability of Moyers mixed dentition arch analysis in children of Baddi, Himachal Pradesh. Materials and methods: Dental study models of 120 children in age group of 13- 16 years, were analysed who presented with complete eruption of permanent mandibular incisors, maxillary and mandibular canines & premolars. All dentitions were required to be free of any signs of dental pathology or anomalies. Measurements of the mesiodistal dimensions of the mandibular and maxillary teeth were made using a digital caliper with a Vernier scale that was calibrated to the nearest 0.01mm. The values were then subjected to statistical analysis. Results: All tooth groups showed highly significant differences (p<0.001) between mesiodistal widths in male and female subjects. Significant differences (p<0.05) were found between actual widths and the Moyers tables at almost all percentile levels, including the recommended 75%. Conclusion: The differences noted between predicted values from the Moyers tables and that of the present investigation might be the result of racial and ethnic diversity.

Predicting the size of unerupted canines and premolars using primary maxillary first molar

One of the most important aspects of interceptive orthodontic diagnosis and treatment planning is space analysis. To date all methods use the size of permanent teeth to predict the dimensions of unerupted teeth. The aim of this study was to predict the permanent teeth size using maxillary primary first molar. The size of primary maxillary first molars and permanent canines and premolars of 80 subjects was measured on their dental casts. Regression equations were determined between the size of primary maxillary first molars and permanent canines and premolars. The new regression equations for predicting permanent tooth size in the maxilla and mandible were, respectively, Y = 2.2X + 13 and Y = 2.4X + 9.5 among females and Y = 2.7X + 5.5 and Y = 2.4X + 9.5 among males. The results show that the primary maxillary first molar size can be used to predict the size of unerupted permanent teeth.

Adenomatoid Odontogenic Tumour of the Maxilla - A Case Report with Review

ABSTRACT Adenomatoid odontogenic tumour is a relatively uncommon odontogenic tumour first described by steensland in 1905. Adenomatoid odontogenic tumour accounts for about 3-7% of all odontogenic tumours, predominantly found in young female patients, located more often in maxilla associated with an unerupted permanent tooth. The tumour often misdiagnosed as an odontogenic cyst. AOT frequently resembles other odontogenic lesions such as dentigerous cysts or ameloblastomas. Therefore, it should be distinguished from the more common lesions of odontogenic origin in routine dental examinations. We present a rare case report of 59-year-old female patient of AOT occurring in the maxilla.

Conservative Treatment of Dentigerous Cysts in Childhood

ABSTRACT Objectives Developmental odontogenic jaw cysts are generally connected with impacted or unerupted teeth. The conservative treatment options of these types of cysts will be presented. Study design In this study 17 cases operated in Süleyman Demirel and Selcuk Universities Faculty of Dentistry were included. The data of the cases were documented with respect to age, sex, localization, symptoms, presence of unerupted teeth on panoramic radiographs. The cysts were treated with marsupialization with an obturator made of acrylic resin in nine patients and a tube drain in eight patients to keep the window open. Results and conclusion Marsupialization was evaluated as extremely effective in 15 patients, the cysts completely disappeared and the permanent teeth were erupted, in two patients the cysts disappeared but the teeth were not erupted. Enucleation, marsupialization or their combination are the conventional treatment options of the jaw cysts. Large cysts may localize nearby the important anatomical structures or may involve unerupted permanent teeth. These kind of cysts may be treated with marsupialization in order to protect these anatomical structures or to allow the eruption of the permanent teeth. Marsupialization should be considered as an effective conservative treatment method of the jaw cysts during mixed dentition in the childhood. How to cite this article Aksoy MÇ, Koçer G, Yildirim G, Baykul T, Dolanmaz D. Conservative Treatment of Dentigerous Cysts in Childhood. Int J Experiment Dent Sci 2014;3(1):14-18.

Idiopathic multiple unerupted permanent teeth: A rare case report

A disturbed eruption process creates a clinical situation that is challenging to diagnose and treat. The clinical spectrum of tooth eruption disorders includes both syndromic and nonsyndromic problems ranging from delayed eruption to a complete failure of eruption. Failure of permanent teeth to erupt without obvious etiology is a rare dental anomaly. Various local and systemic factors have been implicated in failure of eruption of multiple permanent teeth. The present case report discusses the clinical and radiographic details of a 21-year-old asymptomatic and nonsyndromic patient with multiple unerupted permanent teeth.

Pre-eruptive intracoronal dentine radiolucencies in the permanent dentition of Jordanian children

To determine the prevalence of pre-eruptive intracoronal dentine radiolucencies (PEIR) and subject factors or dental conditions associated with PEIR from orthopantograms (OPGs) in unerupted permanent teeth of children. OPGs were evaluated for 1,571 subjects (807 males, 764 females) with mean age (8.72 ± 2.5) years. Unerupted permanent teeth prior to emergence into the oral cavity were assessed. The Chi square test was used to determine statistical differences between the group showing and the group not showing the defect with regards to sex, stage of dental development, presence of developmental anomalies, and condition of primary predecessor teeth. Prevalence was (8.1%) by subject and (0.62%) by teeth. All subjects showed only one affected tooth per subject with no significant gender differences. The highest prevalence was in mandibular first premolars (3.02%). Most defects were noted in the mixed dentition stage (89.06%), mainly in the mandible (79.7%) as single lesions at a mesial location intracoronally, and a size of less than one-third of dentine thickness in (50%). Among all variables examined, PEIR defects were significantly associated with mixed dentition stage (p = 0.000) and decayed/filled primary predecessor teeth (p = 0.028). PEIR defects occur at a significant prevalence rate in unerupted teeth. Increased awareness and careful radiographic examination of unerupted teeth may improve early detection and treatment of PEIR defects in children.

Long-term follow-up of delayed development of maxillary right second premolar with inversely positioned corresponding primary molar

Impaction is defined as a condition in which a tooth fails to erupt within a normal range of functional position. The condition is generally found in permanent teeth, while impaction of primary teeth is considered to be uncommon. We previously presented a rare case of delayed development of a maxillary right second premolar with an inversely positioned corresponding primary molar identified in a girl aged 10 years and 4 months. In the present report of the same patient, we show transitional changes in location and developmental stage of the affected permanent tooth and impacted primary tooth noted during periodical examinations over a 5.5 year period. At 13 years and 2 months, the root of the permanent tooth began to develop, after which the root extended to half of the entire length at 15 years and 3 months. At the most recent examination conducted at 15 years and 9 months, the permanent successor had emerged into the oral cavity and the impacted primary molar maintained a similar position close to the inferior wall of the maxillary sinus without any symptoms. Throughout the observation period, the dental age of the maxillary right second premolar was calculated to be approximately 3 to 4 years behind those of the other second premolars. Our findings in the present case led us to consider that careful observation of the developmental stage of an unerupted permanent tooth is important, while no intervention is required before confirming tooth development as the patient grows, even if the dental age of the corresponding tooth is much later than the ages of other teeth.

歯肉切除後に長期経過観察を行った遺伝性歯肉線維腫症の1例

Hereditary gingival fibromatosis (HGF) is a rare autosomal dominant disorder characterized by slowly progressive fibrous overgrowth of the gingiva. We report the clinical results of long-term follow-up after gingivectomy in a patient with HGF. A 13-year-old boy was referred to our hospital because of gingival overgrowth. The upper and lower gingiva were severely overgrown. The primary dentition was initially affected, and generalized gum overgrowth caused unerupted permanent teeth. There was no sign of syndrome. His father and two sisters had a similar gingival condition. On the basis of these findings, we diagnosed the lesion as a hereditary gingival overgrowth. A gingivectomy was carried out with the patient under local anesthesia, and there was no recurrence after surgery. Recently, son of sevenless-1 (SOS1) has been reported as a responsible gene for HGF. However, no mutation in SOS1 gene was found in this family.

Dentinal Dysplasia Type I: A Case Report with a 6-Year Followup

Introduction. Dentin dysplasia is a rare disturbance of dentin formation characterized by normal enamel but atypical dentin formation with abnormal pulpal morphology that is inherited as an autosomal pulpal morphology. Case Presentation. A 7-year-old female who had problems in chewing function was referred to Oral and Maxillofacial Surgery Department at the Faculty of Dentistry in Ondokuz Mayıs University. In the radiographic examination, it was determined that some of the unerupted permanent teeth of the patient had short, blunted, and malformed roots with obliterated pulp chambers, although the bone below the teeth showed well-defined margins. This unusual case of generalized short roots presents a case demonstrating both classic and atypical features of dentinal dysplasia type I (DDI) in the mixed and permanent dentitions. Conclusion. There are still many issues in the diagnosis and management of patients with dentin dysplasia. Early diagnosis, clinical and radiographic findings, as well as treatment of this condition and the initiation of effective preventive strategies may help prevent or delay loss of dentition.

Deficient Alveolar Bone with Multiple Unerupted Permanent Teeth

ABSTRACTDeficiency in alveolar bone with multiple unerupted permanent teeth without any known etiology is a rare dental anomaly. Various local and systemic factors have been usually related to the multiple unerupted permanent teeth. In this case report we present a case of deficient alveolar bone in maxillary tuberosity region with multiple unerupted permanent teeth and make an effort to find out all possible causes of it. It is critical to diagnose and make proper treatment plan for eruption disturbance in early stage because treatment at a later stage is usually more complicated. The patient management in such cases needs to be planned specifically from multidisciplinary standpoint.How to cite this articleSukh R, Singh A, Tandon P, Singh GP. Deficient Alveolar Bone with Multiple Unerupted Permanent Teeth. World J Dent 2013;4(3):198-201.

Conservative management of dentigerous cyst in a child

Abstract Dentigerous cysts are odontogenic cysts associated with the crowns of unerupted permanent teeth. This article reports the case of a 10-year-old child who presented permanence of deciduous teeth 51, 52, and 53. Panoramic radiograph showed extensive cystic lesion involving the teeth 11, 12 and 13, which were included. Diagnosis of dentigerous cysts was confirmed by incisional biopsy and the treatment was chosen in order to preserve the associated permanent teeth. At 2 years of follow-up, the impacted teeth are positioning itself spontaneously toward its eruption and the patient was referred for orthodontic assessment.

Dentigerous Cyst in Children: A Case Report and Outline of Clinical Management for Pediatric and General Dentists

Dentigerous cysts are the most common developmental odontogenic cysts of the jaw, arising from impacted, embedded or unerupted permanent teeth. They apparently develop by accumulation of fluid between the reduced enamel epithelium and the tooth crown of an unerupted tooth. There is usually no pain or discomfort associated with the cyst unless there is an acute inflammatory exacerbation. Careful evaluation, coupled with meticulous clinical and radiological investigations could help clinicians to arrive at the correct diagnosis as well as address the implicated etiologies, before instituting the most appropriate therapy. Here, we report a case of a dentigerous cyst in the mixed dentition of a 10-year-old female patient and outline its comprehensive management for the benefit of pediatric and general dentists involved in the care of such patients.

Preeruptive intracoronal resorption observed in 13 patients

The literature on preeruptive intracoronal resorption is sparse, comprising mainly reports of single patients. This study includes 13 patients with preeruptive intracoronal resorption, forwarded for consultation regarding diagnostics and etiology. The purposes were to determine which teeth are affected by the condition and describe how the defect is manifested radiographically. We used visual analyses of dental or panoramic radiographs. The mandibular second molar appears to be the tooth that is most often affected by preeruptive intracoronal resorption. The resorption of the dentin in the molar crown was in the initial phases often seen in the medial aspects. The dentin in the crown could also be completely resorbed. The enamel contour encircling the dentin persisted as shown on the radiographs. In 1 maxillary canine, the dentin and enamel structures were completely disorganized by the resorption processes. Specialists in orthodontics are often the first to see radiographs of unerupted permanent teeth; therefore, they have a responsibility to be aware of the condition and refer these patients to an endodontist for treatment planning and prognosis before a decision is made regarding orthodontic treatment.

Cone-beam computed tomography를 이용한 미맹출 영구치의 계측

본 연구는 CBCT(Cone-beam computed tomography)영상에서 미맹출 치아 크기 측정의 재현성과 정확성을 평가하기 위해 시행되었다. 매복치를 주소로 부산대학교 치과병원 소아치과에 내원한 혼합치열기 환자 중 진단 목적으로 CBCT 채득에 동의한 환자의 미맹출 견치 및 소구치 69개를 대상으로 하였다. CBCT 영상에서 측정한 미맹출 치아의 최대 근원심 폭경 계측치와 동일한 치아가 구강 내로 완전히 맹출한 후 채득한 석고 모형에서 대상 치아를 digital caliper로 측정한 최대 근원심 폭경 계측치를 비교하여 다음과 같은 결론을 얻었다. 1. CBCT 영상에서 미맹출 치아를 계측하는 방법은 재현성이 높다(ICC=0.91). 2. CBCT 영상에서 측정한 미맹출 치아의 최대 근원심 폭경 계측치와 석고 모형에서 측정한 대상 치아의 최대 근원심 폭경 계측치는 높은 상관 관계가 있었다(r=0.91). 3. CBCT 영상에서 측정한 미맹출 치아 최대 근원심 폭경 계측치와 석고 모형에서 측정한 대상 치아의 최대 근원심 폭경 계측치는 통계적으로 유의한 차이가 있었다(<TEX>$p$</TEX> <0.05). CBCT 영상에서 측정한 미맹출 치아 최대 근원심 폭경의 계측치가 석고 모형에서 측정한 대상 치아의 최대 근원심 폭경 계측치보다 평균 0.2 mm 작게 측정되었다. 그러나 이러한 차이는 임상적으로 수용 가능한 수준이라 생각된다. The purpose of this study was to evaluate the accuracy and reproducibility of measuring the size of unerupted permanent tooth via cone beam computed tomography(CBCT). Ten children were scanned with dental CBCT, and 3-dimensional reconstruction of the dentitions were generated CBCT. Mesio-distal dimension and buccolingual dimension of the teeth were made directly on the model with a high-precision digitalcaliper and on the CBCT by using three-dimensional dental imaging software. Reliability and accuracy were assessed by using intraclass correlation and paired <TEX>$t$</TEX>-tests. (<TEX>$p$</TEX> <0.05) The results were as follows : 1. Intraclass correlations were above 0.9 for Both the CBCT and the model measurements, showinghigh reliability. 2. Although there were high correlation values(r=0.91) between CBCT and model messurement methods, comparisons between the CBCT and model messurement methods showed a statistically significant difference(<TEX>$p$</TEX> <0.05). 3. The CBCT measurements tended to slightly underestimate by 0.2 mm. But, the systematic difference of CBCT measurements were clinically acceptable Therefore, CBCT measurement method can be used to measure the size of unerupted teeth in a sufficiently accurate way.