Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
toru kitahara Last modified date:2021.06.30

Lecturer / Division of Oral Health, Growth & Development, Faculty of Dental Science / Oral Health Care / Kyushu University Hospital

1. AL BOGHA MHD HASSAN, 北原 亨, 東藤 貢, 百武 弘登, 髙橋 一郎, Predisposing Factors for Orthodontic Mini-Implant Failure Defined by Bone Strains in Patient-Specific Finite Element Models., Annals of Biomedical Engineering, 10.1007/s10439-016-1584-8, 1-9, 2016.03, Factors responsible for the success or failure of orthodontic mini-implants (OMIs) in clinical settings are unclear. Failure of OMIs was found to be associated with increased maximum principal strain (MaxPN) when assessed using the subject-specific finite.
2. Mhd Hassan Albogha, Toru Kitahara, 東藤 貢, Hiroto Hyakutake, Ichiro Takahashi, Maximum principal strain as a criterion for prediction of orthodontic mini-implants failure in subject-specific finite element models. , Angle Orthodontist, 86, 1, 24-31, 2016.01, [URL], Objective: To investigate the most reliable stress or strain parameters in subject-specific finite element (FE) models to predict success or failure of orthodontic mini-implants (OMIs).
Materials and Methods: Subject-specific FE analysis was applied to 28 OMIs used for anchorage. Each model was developed using two computed tomography data sets, the first taken before OMI placement and the second taken immediately after placement. Of the 28 OMIs, 6 failed during the first 5 months, and 22 were successful. The bone compartment was divided into four zones in the FE models, and peak stress and strain parameters were calculated for each. Logistic regression of the failure (vs success) of OMIs on the stress and strain parameters in the models was conducted to verify the ability of these parameters to predict OMI failure.
Results: Failure was significantly dependent on principal strain parameters rather than stress parameters. Peak maximum principal strain in the bone 0.5 to 1 mm from the OMI surface was the best predictor of failure (R2 5 0.8151).
Conclusions: We propose the use of the maximum principal strain as a criterion for predicting OMI failure in FE models..
3. Current approach to treatlnent alternatives planning for skeletal anterior open bite at Kyushu univercity hospital, section of orthodontics..
4. Tomomi Nakamichi, Toru Kitahara, Ichiro Takahashi, Hiroto Hyakutake, Yoko Iwase, Three-dimensional dynamic evaluation of a posed smile in normal occlusion and Class II malocclusion,, 72, 4, 131-141, 2013.06, [URL], Purpose: The purpose of this study was to quantify the three-dimensional movements of the lips during a posed smile and to verify the differences in the dynamic characteristics among normal occlusion and Class II malocclusion. Materials and methods: The subjects included 30 healthy female volunteers with normal occlusion, 23 healthy female volunteers with dentoalveolar Class II malocclusion, and 20 adult female patients with skeletal Class II malocclusion. The three-dimensional measurements of the lips durduring a posed smile were generated using video-based tracking with three high-speed cameras. Eight landmarks on the lips were used to track lip movement. The Scheffe´ method of multiple comparisons was used to identify significant differences among the normal occlusion and both Class II groups. Results: The lower lip point moved significantly faster and farther backward in the skeletal Class II group compared with the other groups. The upper quarter point in the skeletal Class II group in the posed smile was significantly more medial than in the other groups. The vertical movements of the cheilion point of the normal occlusion group were faster than those in the other groups. Conclusion: Three-dimensional dynamic evaluation of posed smiles showed significant differences in the characteristics of lip movement between the normal occlusion and Class II subjects..
5. mariko yoshihara, toru kitahara, Three-dimensional analysis of the pharyngeal airway morphology in growing Japanese girls with and without cleft lip and palate., American journal of orthodontics and dentofacial orthopedics, 10.1016/j.ajodo.2011.09.011, 141, 4 Suppl, 92-101, 2012.04, We evaluated the 3-dimensional craniofacial skeletal and pharyngeal airway morphology in growing patients with and without cleft lip and palate..
6. Nety Trisnawaty, Hideki Ioi, Toru Kitahara, Akira Suzuki, Ichiro Takahashi, Effects of extraction of four premolars on vermilion height and lip area in patients with bimaxillary protrusion., European journal of orthodontics, 10.1093/ejo/cjs035, 1-8, 2012.05, The purpose of this study was to evaluate the effects of orthodontic treatment, involving the extraction of four premolars, on vermilion height and lip area..
7. Kitahara T., Hoshino Y., Maruyama K., In E., Takahashi I., Changes in the pharyngeal airway space and hyoid bone position after mandibular setback surgery for skeletal Class III jaw deformity in Japanese women., American Journal of Orthodontics and Dentofacial Orthopedics, 138, 6, 708.e1-708.e10, 2010.12.
8. Kitahara T., Islam R., Nakata S., Quantitative evaluation of lip morphology at rest and on smiling in orthognathic patients with hyperdivergent retrognathism, Orthodontic Waves, 69, 2, 50-57, 2010.07.
9. Islam R., Kitahara T., Naher L., Hara A., Nakata S., Lip Morphology Changes Following Orthognathic Surgery for Class III Malocclusion, Angle Orthod, 10.2319/031209-143.1, 80, 2, 344-353, 2010.07.
10. Kitahara T., Nakata S., Shiratsuchi Y., Orthognathic surgery case of metal allergy applied orthodontic appliances made of organic polymer., Orthodontic Waves, 68, 4, 178-184, 2009.12.
11. Kitahara T., Okuyama Y., Nakasima A., Kurahara S., Sasaki M., Considerations in correction of mandibular protrusion by intra-oral vertical ramus osteotomy. , Orthodontic Waves, 68:137-144., 2009.08.
12. Kitahara T., Nakasima A., Shiratsuchi Y., Orthognathic treatment with maxillary and mandibular anterior segmental osteotomy , Orthodontic Waves, 68(1), 36-41, 2009.03.
13. Kitahara T., Takashima R., Nakasima A., Kurahara S., Orthognathic treatment case after severe root resorption in the early treatment stage , Orthodontic Waves, 68(1), 28-35, 2009.03.
14. Kitahara T., Nakasima A., Kurahara S., Shiratsuchi Y., Hard and Soft Tissue Stability of Orthognathic Surgery Sagittal Split Ramus Osteotomy (SSRO) and Intraoral Vertical Ramus Osteotomy (IVRO), Angle Orthod, 79(1), 158-165, 2009.01.
15. Kitahara T., Nakasima A., Shiratsuchi Y., Orthognathic Treatment With Autotransplantation of Impacted Maxillary Third Molar, Angle Orthod, 79(2), 401-406, 2009.03.
16. Islam R., Kitahara T., Naher L., Hara A., Nakasima A., Lip Morphological Changes in Orthodontic Treatment, Angle Orthod, 79(2), 256-264, 2009.03.
17. Three-dimensional analysis of smile movement using high speed cameras for the subjects with normal occlusions and jaw deformity.
18. Clinical and statistical study of jaw deformity patients in the Orthodontic Department, Kyushu University Hospital.
19. Matsuuki T., Kitahara T., Nakasima A., Developmental changes in craniofacial morphology in subjects with Duchenne muscular dystrophy, European Journal of Orthodontics, 28(1):42-50, 2006.04.
20. Dentomaxillofacial morphology before and after treatment of the mandibular prognathism belonged to the borderline case between orthosurgical and orthodontic treatments.
21. A case of mandibular prognathism with open bite and mandibular asymmetry treated by surgical-orthodontic therapy.
22. Orthodontic treatment of a sketal asymmetry case with lateral inclination of the occlusal plane.
23. A Skeletal Open bite case Treated by Mandibular Body Ostectomy combined with Glossectomy.
24. Morphological changes upon sagittal split ramus osteotomy for skeletal Class III cases -In relation to a morphology of mandibular symphysis-.
25. Asymmetry of facial soft tissue in TMD patients.
26. Kitahara T., Ichinose M., Nakasima A., Quantitative evaluation of correlation of skull morphology in families in an attempt to predict growth change., European Journal of Orthodontics, 10.1093/ejo/18.2.181, 18, 2, 181-191, 18(2), 181-191, 1996.01.