Pediatric Dental Journal最新文献

{"title":"Eruption cyst caused by congenital tooth in low birth weight infant","authors":"Eri Yoshida,&nbsp;Kana Goto,&nbsp;Daiki Matsuoka,&nbsp;Yukiko Miyai,&nbsp;Haruka Asaumi,&nbsp;Keiko Tabata,&nbsp;Shuhei Naka,&nbsp;Michiyo Matsumoto-Nakano","doi":"10.1016/j.pdj.2023.06.004","DOIUrl":"10.1016/j.pdj.2023.06.004","url":null,"abstract":"<div><h3>Background</h3><p>Low birth<span> weight is defined as less than 2500 g, with premature birth, a live birth within 37 weeks of pregnancy, and fetal growth<span> restriction the most common causes. Congenital (natal) teeth are teeth that have already erupted at birth, and may be primary or supernumerary teeth.</span></span></p></div><div><h3>Case report</h3><p>A low birth weight infant was suspected to have congenital epulis<span> an eruption cyst in the mandibular central incisor<span><span> region. At a two-months checkup, gingival alveolar ridge swelling had disappeared and two mandibular </span>anterior teeth were found erupted at the same site. The diagnosis was eruption cyst caused by a congenital tooth.</span></span></p></div><div><h3>Conclusions</h3><p>A swollen mandibular gingival alveolar ridge was seen at birth, though no feeding problems or other complications were noted. For the present patient, in consideration of age and surgical stress, the first choice for therapy was regular follow-up examination.</p></div>","PeriodicalId":19977,"journal":{"name":"Pediatric Dental Journal","volume":"34 1","pages":"Pages 42-45"},"PeriodicalIF":0.8,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43934967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Progress of LPS-induced apical lesion in rat immature mandibular molars","authors":"Chikako Nakajima ,&nbsp;Maiko Fujita-Otani ,&nbsp;Yuko Mikuni-Takagaki ,&nbsp;Kuniomi Nakamura ,&nbsp;Kouki Hidaka ,&nbsp;Akira Kawata ,&nbsp;Ryota Kawamata ,&nbsp;Shigenari Kimoto","doi":"10.1016/j.pdj.2022.12.001","DOIUrl":"10.1016/j.pdj.2022.12.001","url":null,"abstract":"<div><h3>Introduction</h3><p><span>The objective was to assess the process of apical periodontitis induced by injecting </span><span><em>Porphyromonas gingivalis</em></span><span> lipopolysaccharide<span> (Pg LPS) that is followed by regeneration of roots in premature permanent tooth. A novel operation table was introduced to facilitate endodontic<span> treatment of mandibular molars.</span></span></span></p></div><div><h3>Materials and Methods</h3><p><span>Pulp of mandibular first molars<span> of 6-week Wistar rats were exposed by drilling, inoculated with 0.6 μg Pg LPS and sealed with glass ionomer cement. After 1 and 2 weeks rats were sacrificed and the molar roots compared with those of vehicle controls by </span></span>protein array analysis<span> and (histo) morphology/chemistry. Micro-CT imaging visualized the lesion, and non-decalcified frozen serial sections were HE stained and subjected to TRACP-5b/ALP activity staining and immunohistochemical staining.</span></p></div><div><h3>Results</h3><p><span>Quantitative induction of inflammation enabled us to examine the effects of LPS-injection: micro-CT images exhibited much larger radiolucent apical lesions than did controls; CD68 (M1+ M2±) </span>cell surface marker was more intense in Pg-1w and then subsided while CD163 (M1- M2+) was more intense in Pg-2w. Staining of IL-4, which induces M2 polarization, and angiogenic markers, VEGF/CD34 was intense in Pg-1w than in controls.</p></div><div><h3>Conclusion</h3><p>The introduced apparatus facilitated accurate mandible<span> operation with ease. Thus, stages of pulpal infection were reproduced quantitatively with a small amount of Pg LPS. Proteins expressed in the root apex where inflammation occurred and the lesion in the surrounding alveolar bone revealed the inflammation time course in the immature permanent teeth. This mandibular model turned out quite useful for clinical and pharmaceutical developments in the future.</span></p></div>","PeriodicalId":19977,"journal":{"name":"Pediatric Dental Journal","volume":"33 1","pages":"Pages 14-24"},"PeriodicalIF":0.8,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43295431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Histological findings of regional odontodysplasia in maxillary right region in two cases","authors":"Masamichi Ide ,&nbsp;Yohei Oshima ,&nbsp;Toshie Chiba ,&nbsp;Akari Adaniya ,&nbsp;Takako Kuroki ,&nbsp;Yasuo Miake ,&nbsp;Yoshinobu Asada","doi":"10.1016/j.pdj.2022.11.002","DOIUrl":"10.1016/j.pdj.2022.11.002","url":null,"abstract":"<div><h3>Background</h3><p><span>Regional odontodysplasia is a rare developmental anomaly usually affecting maxillary anterior region. We reported clinical observation in relation to two cases of regional odontodysplasia as the first report (Ped Dent J 2020; 30:124–128). There are only a few studies that have reported the detailed histological structure of teeth affected by odontodysplasia. The purpose of this report was to explore histologically the </span>primary teeth affected by odontodysplasia in the two cases.</p></div><div><h3>Materials and methods</h3><p>The subjects of this study were two primary teeth with odontodysplasia reported as the first report, upper right primary lateral incisor<span> of case1 and upper right primary first molar of case 2. These affected teeth were observed using stereo microscope, high resolution X-ray CT scanner (Micro CT), optical microscope and electron beam probe microanalyzer (EPMA).</span></p></div><div><h3>Result</h3><p>The surface of both teeth was rough and the volume of enamel was small at the hypoplastic areas. Histological findings revealed that enamel rods as well as dentinal tubules were unclear and that the volume of minerals in enamel was low in the case 1.</p></div><div><h3>Conclusion</h3><p><span>Detailed histological observation revealed that enamel and dentine were hypoplastic. It was suggested that tooth germ formation began normally, but problems occurred in cell differentiation stages of teeth affected by odontodysplasia. Moreover, hypocalcification was more severe in the primary </span>anterior tooth<span> than the primary molar.</span></p></div>","PeriodicalId":19977,"journal":{"name":"Pediatric Dental Journal","volume":"33 1","pages":"Pages 7-13"},"PeriodicalIF":0.8,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45881934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Panoramic imaging may detect morphologically abnormal temporomandibular joints in children with juvenile idiopathic arthritis","authors":"Malin Collin ,&nbsp;Nikolaos Christidis ,&nbsp;Malin Ernberg ,&nbsp;Laila Wiklander ,&nbsp;Linda Z. Arvidsson ,&nbsp;Tore A. Larheim ,&nbsp;Britt Hedenberg-Magnusson","doi":"10.1016/j.pdj.2023.01.004","DOIUrl":"10.1016/j.pdj.2023.01.004","url":null,"abstract":"<div><h3>Objective</h3><p>To investigate the reliability of panoramic imaging (PAN) with cone beam computed tomography (CBCT) as gold standard to distinguish between normal and abnormal temporomandibular joint (TMJ) morphology in a sample of children with juvenile idiopathic arthritis (JIA).</p></div><div><h3>Material and method</h3><p>In this prospective cohort study, 106 PAN and 108 CBCT examinations from 54 children were obtained. A classification system with reference images was developed and used to discriminate between normal and abnormal TMJ morphology. The severity of abnormality and additional findings were registered. Three experienced and calibrated maxillofacial radiologists evaluated the images and intra- and inter-reader agreement was calculated.</p></div><div><h3>Results</h3><p>Consensus diagnosis of abnormal TMJ morphology on PAN and on CBCT was registered in 27.6% and 28.1% of the joints, respectively. There were differences between the two imaging modalities regarding severity grading of abnormality and registration of additional findings. With CBCT abnormal TMJ morphology was frequently graded as more severe and additional findings such as erosions and osteophytes more frequently found.</p></div><div><h3>Conclusion</h3><p>With trained readers, PAN was found to distinguish between morphologically normal and abnormal TMJs equally often as CBCT. Thus, the method seems valuable for assessing TMJ involvement in children with JIA. However, CBCT was found to be superior for assessing severity of abnormality and additional diagnostic information.</p></div>","PeriodicalId":19977,"journal":{"name":"Pediatric Dental Journal","volume":"33 1","pages":"Pages 52-60"},"PeriodicalIF":0.8,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45746980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Idiopathic internal resorption in primary canines and molars – Case report","authors":"Takahiro Kitamura,&nbsp;Masatoshi Otsugu,&nbsp;Marin Ochiai,&nbsp;Maika Kadono,&nbsp;Aya Muranaka,&nbsp;Kazuhiko Nakano","doi":"10.1016/j.pdj.2022.11.001","DOIUrl":"10.1016/j.pdj.2022.11.001","url":null,"abstract":"<div><h3>Background</h3><p>We report a case of idiopathic internal resorption in primary canines and molars.</p></div><div><h3>Case Presentation</h3><p><span>A Japanese boy aged 4 years 0 months with no history of orofacial trauma was referred for a fracture in the crown of the maxillary right primary canine with exposed pulp. Internal resorption was diagnosed, and pulp treatment was performed to preserve the tooth from further resorption. Consequently, internal resorption was found in five </span>primary teeth within 18 months during follow-up appointments.</p></div><div><h3>Conclusion</h3><p>In patients with idiopathic internal resorption seen in multiple primary teeth, short-term follow-up examinations and treatment for tooth preservation should be performed.</p></div>","PeriodicalId":19977,"journal":{"name":"Pediatric Dental Journal","volume":"33 1","pages":"Pages 69-73"},"PeriodicalIF":0.8,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46285822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of eye movement patterns during reading of mixed dentition panoramic radiographs in dental students","authors":"Satoshi Tanaka ,&nbsp;Hiroyuki Karibe ,&nbsp;Yuichi Kato ,&nbsp;Akira Komatsuzaki ,&nbsp;Tsuneo Sekimoto ,&nbsp;Junko Shimomura-Kuroki","doi":"10.1016/j.pdj.2023.01.002","DOIUrl":"10.1016/j.pdj.2023.01.002","url":null,"abstract":"<div><h3>Objectives</h3><p>This study aimed to clarify effective eye movement patterns during mixed dentition panoramic radiographic reading in dental students.</p></div><div><h3>Methods</h3><p>Sixty fifth-year dental students (19 women and 41 men) participated in the study and visually observed mixed dentition panoramic radiograph. Eye movement patterns during reading were classified into group R for clockwise (right rotation), group L for counterclockwise (left rotation), or group S for few fixations and mainly saccades. The reading results, number of fixations, number of blinks, pupil area, and average amplitude were compared among the three groups.</p></div><div><h3>Results</h3><p>Participants in group R had significantly better reading performance (P &lt; 0.001, analysis of variance) and tended to have larger pupil areas than the other groups. Participants in group S had poorer reading performance, significantly fewer fixations, significantly more blinks, smaller pupil area, and greater average amplitude than the other groups (P &lt; 0.001, respectively, analysis of variance, Kruskal–Wallis test).</p></div><div><h3>Conclusions</h3><p>When reading panoramic radiographs in the mixed dentition phase, observations in a clockwise order are recommended, as they are associated with improved learning performance. Frequent eye movements may indicate lower levels of interest or difficulty with the task and are associated with poorer learning performance. Classifying eye movement patterns while observing a test image provides suggestions that can be used to improve education in diagnostic imaging of pediatric dentistry.</p></div>","PeriodicalId":19977,"journal":{"name":"Pediatric Dental Journal","volume":"33 1","pages":"Pages 33-41"},"PeriodicalIF":0.8,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47362961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Case of osteopetrosis with multiple impacted primary and permanent teeth diagnosed at eight years old","authors":"Rena Okawa,&nbsp;Tamami Kadota,&nbsp;Kayoko Nagayama,&nbsp;Yuto Suehiro,&nbsp;Katsuhiko Masuda,&nbsp;Kazuhiko Nakano","doi":"10.1016/j.pdj.2023.02.002","DOIUrl":"10.1016/j.pdj.2023.02.002","url":null,"abstract":"<div><h3>Background</h3><p><span>Osteopetrosis is a rare skeletal disease characterized by increased bone density caused by a malfunction of </span>osteoclasts.</p></div><div><h3>Case presentation</h3><p>An 8-year-4-month-old girl with multiple primary and permanent tooth impaction was diagnosed with osteopetrosis. In spite of typical manifestations of osteopetrosis in early childhood, including visual and hearing impairments, short stature, and dental abnormalities, diagnosis was severely delayed.</p></div><div><h3>Conclusion</h3><p><span>Multiple impacted teeth may indicate a possible diagnosis of osteopetrosis. Dentists should perform an </span>orthopantomography<span> examination when eruption disturbances are encountered and systemic disease should also be suspected, with referral to a pediatrician when necessary.</span></p></div>","PeriodicalId":19977,"journal":{"name":"Pediatric Dental Journal","volume":"33 1","pages":"Pages 80-84"},"PeriodicalIF":0.8,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44702702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of microleakage and interfacial adaptation following simultaneous activation technique in primary molars","authors":"Heer Kadhi,&nbsp;Jasmin Winnier,&nbsp;Ishani Ratnaparkhi","doi":"10.1016/j.pdj.2022.10.001","DOIUrl":"10.1016/j.pdj.2022.10.001","url":null,"abstract":"<div><h3>Background</h3><p>Simultaneous Activation Technique is a newer method of co-curing resin modified glass ionomer (RMGI) and self-etch adhesive.</p></div><div><h3>Aim</h3><p>Assessment of microleakage and interfacial adaptation following simultaneous activation technique in primary molars.</p></div><div><h3>Design</h3><p>Standardized Class I cavities were prepared in 66 non-carious primary molars and randomly allocated to Group I – Simultaneous activation of RMGI and self-etch adhesive (SAT); Group II – SAT with enamel etching (SAT + EE); Group III – Conventional Sandwich Technique (ST) and restored with bulk fill composite. Time taken was calculated using stopwatch. Microleakage was assessed using dye penetration method under stereomicroscope. Seven samples per group were sent for Scanning Electron Microscopy (SEM) analysis. One-Way Analysis of Variance and Post- Hoc Tukey's test were applied at P &lt; 0.05.</p></div><div><h3>Results</h3><p>Mean microleakage of group I, II and III were 1.23, 1.41 and 1.59 respectively. Time taken was least for SAT followed by SAT + EE and ST group. Statistically significant difference was seen between SAT and ST group (p &lt; 0.0001) and SAT + EE and ST group (p &lt; 0.0001). SEM analysis showed better mean interfacial adaptation in SAT + EE (1.00) followed by ST (2.14) and SAT (3.57) group. Difference between SAT + EE and SAT group was significant (p = 0.005).</p></div><div><h3>Conclusion</h3><p>Simultaneous activation technique with selective enamel etching resulted in less microleakage and better interfacial adaptation.</p></div>","PeriodicalId":19977,"journal":{"name":"Pediatric Dental Journal","volume":"33 1","pages":"Pages 1-6"},"PeriodicalIF":0.8,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46637252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of palatine tonsil hypertrophy on tongue posture and maxillofacial dentition: A pharyngeal airway computational fluid dynamics study","authors":"Yoichiro Oku ,&nbsp;Tomonori Iwasaki ,&nbsp;Toshiya Tsujii ,&nbsp;Rina Sakoda-Iwata ,&nbsp;Soujiro Hisagai ,&nbsp;Yuusuke Ban ,&nbsp;Hideo Sato ,&nbsp;Hitomi Ishii ,&nbsp;Ryuzo Kanomi ,&nbsp;Youichi Yamasaki","doi":"10.1016/j.pdj.2023.01.003","DOIUrl":"10.1016/j.pdj.2023.01.003","url":null,"abstract":"<div><h3>Objectives</h3><p>This study aimed to clarify the effect of palatine tonsil<span> hypertrophy-induced ventilation obstruction on maxillofacial dentition morphology using computational fluid dynamics (CFD) to represent tongue posture and maxillofacial dentition three dimensionally.</span></p></div><div><h3>Materials and methods</h3><p><span>We analyzed data of 20 patients with tonsil hypertrophy (tonsil hypertrophy group (TG); 9.0 years old, seven boys) and a comparison group (CG) of 20 patients without tonsil </span>hyperplasia (comparison group; 9.4 years old, 10 boys). Cone-beam computed tomography and CFD data were used to assess the effects of palatine tonsil hypertrophy on pharyngeal airway ventilation, tongue posture, and morphology of the maxillofacial dentition.</p></div><div><h3>Results</h3><p>The TG exhibited significantly greater depth, narrower width, smaller cross-sectional area of the pharyngeal airway, and narrower maxillary dental arch with Class II than the CG. Additionally, the tongue was positioned significantly more anteriorly and inferiorly in the TG than that in the CG.</p></div><div><h3>Conclusions</h3><p>Our data suggest that hypertrophy of the palatine tonsils narrows the pharyngeal airway, resulting in a smaller cross-sectional area. Widening of the pharyngeal airway may occur due to compensatory anterior displacement of the tongue to prevent ventilation obstruction. This may decrease palatal support, disturbing the pressure balance of the maxillary molar region between the buccal and palatal sides and resulting in lateral undergrowth of the maxillary bone and narrowing of the maxillary dental arch.</p></div>","PeriodicalId":19977,"journal":{"name":"Pediatric Dental Journal","volume":"33 1","pages":"Pages 42-51"},"PeriodicalIF":0.8,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43963242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pedunculated, papillary giant cell fibroma in a pediatric patient: An immunohistochemical and in situ hybridization study","authors":"Heitor Albergoni Silveira ,&nbsp;Yara Teresinha Correa Silva-Sousa ,&nbsp;Magdalena Raquel Torres Reyes ,&nbsp;Vanessa da Rocha Bernardini ,&nbsp;Luis José Floriam ,&nbsp;Jorge Esquiche León","doi":"10.1016/j.pdj.2023.01.005","DOIUrl":"10.1016/j.pdj.2023.01.005","url":null,"abstract":"<div><p><span>Giant cell fibroma (GCF), a benign fibrous proliferation, represents about 4.7% of all benign/reactive fibrous growths in the </span>oral cavity<span>. GCF preferentially affects Caucasians, with a peak incidence in the third decade of life, and slight female predilection. Clinically, small gingival nodules (about 1.0 cm in diameter) are often observed. Herein, we report a 5-year-old girl who was referred for evaluation of a pedunculated nodule on the gingiva<span><span>, resembling a human papillomavirus (HPV)-associated papillary lesion clinically and microscopically. HPV was not detected by immunohistochemical and </span>in situ hybridization analysis in the excised surgical specimen. Thus, the lesion was diagnosed as GCF. Papillary surface projections are rarely described in GCF, but it should be included in its clinicopathological spectrum, especially in pediatric patients.</span></span></p></div>","PeriodicalId":19977,"journal":{"name":"Pediatric Dental Journal","volume":"33 1","pages":"Pages 74-79"},"PeriodicalIF":0.8,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45162902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}