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Mesially Directed Inclination of Posterior Teeth Contributing to Maxillary High Canine, and Changes during orthodontic Treatment

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Open Journal of Stomatology 2019年第3期9卷 64-74页

作者： Morio masunaga Hiroshi Ueda Tatsuya Shibaguchi Kazuo Tanne masunaga orthodontic office Osaka Japan Department of orthodontics and Craniofacial Developmental Biology Graduate School of Biomedical Sciences Hiroshima University Hiroshima Japan

Objective: The aim of study was to evaluate the nature of mesiodistal angulation of the posterior teeth in patients with maxillary high canine, and to identify possible associations of crowding with mesial axial angulation of the maxillary posterior teeth. Methods: The present study included seven Japanese male and 23 Japanese female patients. Study models were analyzed to evaluate the effectiveness of orthodontic treatment. A protractor was used to measure crown angulations, which were measured with reference to the posterior angle between the functional occlusal plane (FOP) and the long axis of the clinical crown of the lateral teeth and first molars. A sliding digital caliper was used to measure dental arch widths. Changes in the rotation of the maxillary molars were analyzed using “occlu-sograms”, which were printed from photographs of the occlusal aspect of the study model. Results: The maxillary teeth interacted with one another in the alveolar bone, resulting in progressive mesial tipping of the posterior teeth before orthodontic treatment. After orthodontic treatment, the angle relative to the FOP exhibited a significant increase, indicating that the maxillary teeth underwent distally directed uprighting (P P Conclusions: Based on the results, both uprighting of mesially tipped lateral teeth and expansion of narrow dental arches could prove to be keys to success in space regaining or correction of high canines and mild crowding.

关键词： High Canine Posterior Teeth Crown Angulation Functional Occlusal Plane

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THE NEW METHOD OF CEPHALOMETRIC PREDICTION TRACING FOR MAXILLARY AND MANDIBULAR ANTERIOR SEGMENTAL OSTEOTOMIES

THE NEW METHOD OF CEPHALOMETRIC PREDICTION TRACING FOR MAXIL...

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第二届中国国际暨第五届全国口腔颌面外科学术会议

作者： Y．NOMURA H．HANDA H.SHIMIZU G．MASUDA NOMURA orthodontic office YOKOHAMA CITY KOWAN HOSPITAL JAPAN HANDA orthodontic office YOKOHAMA CITY KOWAN HOSPITAL JAPAN SHIMIZU orthodontic office YOKOHAMA CITY KOWAN HOSPITAL JAPAN DEPT.OF ORAL SURGERY YOKOHAMA CITY KOWAN HOSPITAL JAPAN

Maxillary and mandibular anterior segmental osteotomies are indicated to the adult patients with anterior dentoalveolar *** the preoperative planning stage,we performed the new method of cephalometric prediction *** our method,nomarative data on the incisor position in relation to soft tissue profile was based on 20 cases after orthodontic

关键词： profile THE NEW METHOD OF CEPHALOMETRIC PREDICTION TRACING FOR MAXILLARY AND MANDIBULAR ANTERIOR SEGMENTAL OSTEOTOMIES

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Tooth loss caused by displaced elastic during simple preprosthetic orthodontic treatment

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World Journal of Clinical Cases 2016年第9期4卷 285-289页

作者： Simona Dianiskova Chiara Calzolari Marco Migliorati Armando Silvestrini-Biavati Gaetano Isola Fabio Savoldi Domenico Dalessandri Corrado Paganelli orthodontic Postgraduate Programme Dental SchoolSlovak Medical University orthodontics Department School of DentistryUniversity of Genova Department of Biomedical Odontostomatological Sciences and of Morphological and Functional ImagesUniversity of Messina Department of Neurosciences Reproductive and Odontostomatological SciencesSchool of MedicineUniversity "Federico Ⅱ" Department of orthodontics School of DentistryUniversity of Brescia

The use of elastics to close a diastema or correct tooth malpositions can create unintended consequences if not properly controlled. The American Association of Orthodontists recently issued a consumer alert, warning of "a substantial risk for irreparable damage" from a new trend called "do-it-yourself" orthodontics, consisting of patients autonomously using elastics to correct tooth position. The elastics can work their way below the gums and around the roots of the teeth, causing damage to the periodontium and even resulting in tooth loss. The cost of implants to replace these teeth would well exceed the cost of proper orthodontic care. This damage could also occur in a dental office, when a general dentist tries to perform a simplified orthodontic correction of a minor tooth malposition. The present case report describes a case of tooth loss caused by a displaced intraoral elastic, which occurred during a simple preprosthetic orthodontic treatment.

关键词： orthodontics Intraoral elastics Periodontal damage Tooth extraction Pre-prosthetic treatment

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Evaluation of Maxillary Dental Arch Widths in Individuals Having Unilateral and Bilateral Cleft Lip and Palate Using Three-Dimensional Digital Models

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Open Journal of Stomatology 2019年第7期9卷 159-167页

作者： Ege Dogan Abdü lkadir Iş ik Servet Dogan Private office Izmir Turkey zmir Atatü rk Eğ itim ve Araş tı rma Hastanesi Izmir Turkey Department of orthodontics Faculty of Dentistry Ege University Izmir Turkey

Aim: Maxillary dental arch widths were evaluated in individuals having unilateral (UCLP) and bilateral (BCLP) cleft lip and palate (CLP) using three-dimensional (3D) digital models. Material and Method: The study had been conducted on 80 individuals aged between 14 - 17 years having UCLP and BCLP. 40 of the individuals had UCLP, whereas 40 had BCLP. The maxillary dental models taken from patients before the treatment were scanned using Orthomodel Programme (v.1.01, Orthomodel Inc., Istanbul, Turkey) to obtain 3D imagery. Student’s t-test was used in order to assess the data obtained by using SPSS software version 22.0. Results: In BCLP, the average inter-canine distance was 17.44 ± 1.31 mm, the average inter-molar distance was 36.57 ± 1.12 mm, while inter-canine/inter-molar ratio was 0.47. Whereas in UCLP, it was 25.10 ± 0.63 mm, 42.20 ± 0.53 mm and 0.59. The inter-canine distance in UCLP was found to be large enough to be statistically significant (p 0.05), even though there were differences in inter-molar widths. Conclusion: For the stable orthodontic treatment results, one of the most important points is arch form and widths to be coherent with each other. In our study, the increase of inter-canine distance seen in UCLP indicates that in the cleft region, the maxillary arch is inclined over to the back, while the same situation in BCLP suggests that the maxillary segments are collapsed inside. The difference in the arch is highly affected by the primary surgical treatment.

关键词： Unilateral Cleft Lip and Palate Bilateral Cleft Lip and Palate Three-Dimensional Digital Models

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