Journal of oral science最新文献_第9页

Gender and age effects on dental and palatal arch dimensions among full siblings. 性别和年龄对完全兄弟姐妹牙齿和腭弓尺寸的影响。

IF 1.9 4区医学

Journal of oral science Pub Date : 2023-10-01 Epub Date: 2023-08-24 DOI: 10.2334/josnusd.23-0043

Yong S Mei, Alizae M F Syed Mohamed, Murshida Marizan Nor, Tanti I Rosli

{"title":"Gender and age effects on dental and palatal arch dimensions among full siblings.","authors":"Yong S Mei, Alizae M F Syed Mohamed, Murshida Marizan Nor, Tanti I Rosli","doi":"10.2334/josnusd.23-0043","DOIUrl":"10.2334/josnusd.23-0043","url":null,"abstract":"Purpose: This study was conducted to investigate the dental and palatal arch dimensions of male and female siblings in relation to gender and age, using three-dimensional (3D) digital casts.Methods: This study involved 54 subjects (27 pairs) of male-female siblings aged 15 to 45 years. Dental casts were digitized and analyzed for tooth size (TS), arch width (AW), arch length (AL), arch length discrepancy (ALD), and palatal arch dimensions (PAD). The data obtained were subjected to t-tests, and the palatal curvature (PC) was modeled using a fourth-order polynomial.Results: Significant differences (P < 0.05) between the sexes were found in the mesiodistal TS, particularly in all canines, as well as 16, 36, 46, and 41. Maxillary AW and AL were also significantly (P < 0.05) influenced by sexes. Most arch parameters were more prominent in male siblings, and the effect of age on PC differed between the sexes. In addition, the PC of adolescent females was mostly superimposed on adult females relative to males.Conclusion: Among siblings, males were found to have significantly larger dental arch dimensions than females. Furthermore, PC showed some differences between the sexes in both the frontal and sagittal planes.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":" ","pages":"237-242"},"PeriodicalIF":1.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10059901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Amount of toothpaste used by dental students. 牙科学生使用牙膏的数量。

IF 1.9 4区医学

Journal of oral science Pub Date : 2023-10-01 Epub Date: 2023-08-24 DOI: 10.2334/josnusd.23-0047

Shekev Limacher, Lea Angst, Murali Srinivasan

{"title":"Amount of toothpaste used by dental students.","authors":"Shekev Limacher, Lea Angst, Murali Srinivasan","doi":"10.2334/josnusd.23-0047","DOIUrl":"10.2334/josnusd.23-0047","url":null,"abstract":"Purpose: This study analyzed associations of cumulative learning, demographic characteristics, fluoride content, and toothbrush head size with the amount of toothpaste used by dental students.Methods: Students in the third and fifth year of dental school were recruited. Each participant was asked to dispense three toothpastes (pediatric, regular fluoride, and high fluoride) on five toothbrushes (rotation-oscillation, sonic, manual pediatric, and two manual adult toothbrushes). The length and weight of the toothpaste dispensed were recorded. The data were evaluated by nonparametric correlation analysis (P < 0.05).Results: Eighty-one students (third year = 42; fifth year = 39; mean age: 26.2 ± 5.3 years) participated in the study. More toothpaste was dispensed by third-year students than by fifth-year students (weight: P = 0.014; length: P = 0.037). Men dispensed more toothpaste than did women (weight: P < 0.001; length: P = 0.042). Participants with higher educational attainment dispensed less toothpaste (weight: P < 0.001; length: P < 0.001). The type of toothbrush was associated with the weight of toothpaste dispensed (P < 0.001). Toothbrush head size was inversely associated with the length of toothpaste dispensed (P < 0.001).Conclusion: The amount of toothpaste used by dental students was associated with cumulative learning, educational attainment, sex, and toothbrush head size but not with the fluoride content of the toothpaste.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":" ","pages":"214-218"},"PeriodicalIF":1.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10061969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Masticatory performance with one missing molar. 缺失一颗臼齿的咀嚼性能。

IF 1.9 4区医学

Journal of oral science Pub Date : 2023-10-01 Epub Date: 2023-08-10 DOI: 10.2334/josnusd.23-0212

Masaoki Yokoyama, Hiroshi Shiga, Kunihisa Nakajima, Hanako Uesugi, Marie Komino, Mako Sano, Akira Takakusaki, Yukinori Iwanami, Kenichiro Kojima, Etsuro Hanawa

{"title":"Masticatory performance with one missing molar.","authors":"Masaoki Yokoyama, Hiroshi Shiga, Kunihisa Nakajima, Hanako Uesugi, Marie Komino, Mako Sano, Akira Takakusaki, Yukinori Iwanami, Kenichiro Kojima, Etsuro Hanawa","doi":"10.2334/josnusd.23-0212","DOIUrl":"10.2334/josnusd.23-0212","url":null,"abstract":"Purpose: This study aimed to evaluate masticatory performance in cases where one molar was missing.Methods: Participants were 156 adults with one molar missing from their natural teeth, who were divided into group A (without prosthetic treatment) and group B (with prosthetic treatment). The non-missing side was designated as A1 or B1, and the missing side was designated as A2 or B2. The amount of glucose eluted (AG) when the participants chewed a gummy jelly was measured and used as a parameter for masticatory performance. AG was compared between the non-missing side (A1, B1) and missing side (A2, B2), and between the first molar missing group and second molar missing group.Results: AG was significantly greater on the dentate side (P < 0.001) and was significantly less in the A2 group when the first molar was missing (P = 0.002). The rate of decrease of AG was 11.1%, 14.3%, and 8.4% in groups A+B, A, and B, respectively.Conclusion: Masticatory performance appears to decrease even with only one missing molar. Although improvement is achieved by prosthetic treatment, performance remains inferior to that on the dentate side.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":" ","pages":"243-245"},"PeriodicalIF":1.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9967162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficacy of the HBW Ultrasonic Ring for retrieval of fragmented manual or rotatory instruments. HBW超声环用于回收零散手动或旋转器械的疗效。

IF 1.9 4区医学

Journal of oral science Pub Date : 2023-10-01 Epub Date: 2023-08-10 DOI: 10.2334/josnusd.23-0031

Jennifer Galván-Pacheco, Verónica Méndez-González, Ana González-Amaro, Heriberto Bujanda-Wong, Amaury Pozos-Guillén, Arturo Garrocho-Rangel

引用次数: 0

The biomechanical stability of miniplate osteosynthesis configurations in bilateral mandibular angle fractures. 微型接骨板在双侧下颌角骨折中的生物力学稳定性。

IF 1.9 4区医学

Journal of oral science Pub Date : 2023-10-01 Epub Date: 2023-08-31 DOI: 10.2334/josnusd.23-0164

Nida Ay, Senem Yildirimturk Dogan, Yigit Sirin

{"title":"The biomechanical stability of miniplate osteosynthesis configurations in bilateral mandibular angle fractures.","authors":"Nida Ay, Senem Yildirimturk Dogan, Yigit Sirin","doi":"10.2334/josnusd.23-0164","DOIUrl":"10.2334/josnusd.23-0164","url":null,"abstract":"Purpose: The present study investigated the biomechanical stability of three miniplate osteosynthesis configurations used for internal fixation of bilateral mandibular angle fracture (BMAF).Methods: Standard fracture lines were created in 72 polyurethane mandibles and stabilized with 2.0-mm, 4-hole standard titanium miniplates and monocortical screws. The group descriptions and miniplate configurations were: 2Plates (1-1), 3Plates (1-2) and 4Plates (2-2). The mandibles were subjected to either incisal or molar loads (from both sides in the 3Plates group) up to a force of 120 N. The displacements of the constructs were recorded at each force increment of 10 N. ANOVA and Tukey's post-hoc tests were used for statistical analysis.Results: The 2Plates group showed higher displacement under both loading conditions (P < 0.05 for each). The same group reached displacement levels of 1 mm and 3 mm during molar loading and 1 mm, 3 mm, and 5 mm during incisal loading at lower force magnitudes relative to others (P < 0.05 for each).Conclusion: Bone-plate constructs for BMAFs stabilized with three or four standard miniplates are more likely to provide similar resistance when subjected to incisal or molar loads, in contrast to the two-miniplate configuration, which is relatively more prone to displacement.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":" ","pages":"265-269"},"PeriodicalIF":1.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10476427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of sitting posture with and without sole-ground contact on chewing stability and masticatory performance. 有和无足底地面接触的坐姿对咀嚼稳定性和咀嚼性能的影响。

IF 1.9 4区医学

Journal of oral science Pub Date : 2023-10-01 Epub Date: 2023-08-18 DOI: 10.2334/josnusd.23-0172

Kiwamu Sakaguchi, Noshir R Mehta, Tomoaki Maruyama, Leopoldo P Correa, Atsuro Yokoyama

{"title":"Effect of sitting posture with and without sole-ground contact on chewing stability and masticatory performance.","authors":"Kiwamu Sakaguchi, Noshir R Mehta, Tomoaki Maruyama, Leopoldo P Correa, Atsuro Yokoyama","doi":"10.2334/josnusd.23-0172","DOIUrl":"10.2334/josnusd.23-0172","url":null,"abstract":"Purpose: To verify the effect of sitting posture with and without sole-ground contact on chewing stability and masticatory performance.Methods: Thirty healthy subjects were evaluated. The Conformat was used to analyze the center of sitting pressure (COSP), and the three-dimensional motion analysis system was used to analyze changes in head and trunk postures while subjects remained in a sitting position with and without sole-ground contact. The parameters of masticatory performance and movement were calculated as follows. For evaluating masticatory performance, the amount of glucose extraction (AGE) during chewing of a gummy jelly was measured. For evaluating masticatory movements, the movement of the mandibular incisal point was recorded using the Motion Visi-Trainer V1, and parameters of the stabilities of movement path and rhythm were calculated.Results: Head and trunk sway values and the displacement of COSP were significantly smaller with sole-ground contact than those without sole-ground contact. The masticatory movement path with sole-ground contact showed less variation in the opening distance and more stable movement path compared to those without sole-ground contact. The AGE was significantly greater with sole-ground contact than that without sole-ground contact.Conclusion: Sitting posture with and without sole-ground contact affects chewing stability and masticatory performance.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":" ","pages":"251-256"},"PeriodicalIF":1.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10028970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of build orientation on the trueness of occlusal splints fabricated by three-dimensional printing. 构建方向对三维打印制作的咬合夹板真实性的影响。

IF 1.9 4区医学

Journal of oral science Pub Date : 2023-10-01 Epub Date: 2023-09-08 DOI: 10.2334/josnusd.23-0115

Andrew B Cameron, Keith Tong, Santosh Tadakamadla, Jane L Evans, Menaka Abuzar

{"title":"Effect of build orientation on the trueness of occlusal splints fabricated by three-dimensional printing.","authors":"Andrew B Cameron, Keith Tong, Santosh Tadakamadla, Jane L Evans, Menaka Abuzar","doi":"10.2334/josnusd.23-0115","DOIUrl":"10.2334/josnusd.23-0115","url":null,"abstract":"Purpose: Scientific evidence pertaining to the evaluation of trueness of occlusal splints fabricated using different three-dimensional (3D) printers and build orientations compared to subtractive technologies is lacking.Methods: Overall, one hundred and ten occlusal splints were manufactured using two different 3D printers and a dental mill. Five groups of ten were fabricated using the 3D printers at different build orientations (0, 30, 45, 60, and 90 degrees). In addition, a comparison group of ten occlusal splints was subtractively manufactured using a five-axis dental mill. All occlusal splints were scanned and exported as a standard tessellation language file. Analysis was conducted with metrology software with root mean square estimate average positive deviation and average negative deviation used as the measured outcome.Results: The 0 degree printing orientation was the most accurate for printer one with the root mean square value of 0.05 ± 0.01 mm, and 60 degree printing orientation was most accurate for printer two with the RMS value of 0.11 ± 0.01 mm. Subtractively manufactured occlusal splint had significantly higher trueness with the lowest RMS value of 0.03 ± 0.05 mm.Conclusion: Build orientations influence the trueness of additively manufactured occlusal splints while occlusal splints produced by subtractive manufacturing were statistically significantly more accurate.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":" ","pages":"261-264"},"PeriodicalIF":1.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10553806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of mandibular second molar root and canal morphology in a Black South African population using cone-beam computed tomography and two classification systems. 使用锥形束计算机断层扫描和两种分类系统对南非黑人人群下颌第二磨牙根管形态的调查。

IF 1.9 4区医学

Journal of oral science Pub Date : 2023-10-01 Epub Date: 2023-08-03 DOI: 10.2334/josnusd.23-0123

Glynn D Buchanan, Mohamed Y Gamieldien, Inger Fabris-Rotelli, Albert van Schoor, Andre Uys

{"title":"Investigation of mandibular second molar root and canal morphology in a Black South African population using cone-beam computed tomography and two classification systems.","authors":"Glynn D Buchanan, Mohamed Y Gamieldien, Inger Fabris-Rotelli, Albert van Schoor, Andre Uys","doi":"10.2334/josnusd.23-0123","DOIUrl":"10.2334/josnusd.23-0123","url":null,"abstract":"Purpose: To investigate the root and canal morphology of mandibular second molars, including anatomical variations, in a Black South African population using two classification systems.Methods: Cone-beam computed tomography images of 386 teeth were evaluated. The number of roots and canal configurations were categorized using the classifications of Vertucci (with modifications by Sert and Bayirli) and Ahmed et al. (including the modified Melton classification). Relationships between variables were assessed using Fisher's exact test (P < 0.05).Results: Mandibular second molars were predominantly two-rooted (91.7%). The majority of teeth had three canals including Type IV mesial (41.2%) and Type I (75.1%) distal (Ahmed et al. configuration: 2MDM M2 D1). Three or more canals were present in almost one-fifth of mesial (n = 72/386, 18.6%) and a small number of distal (n = 21/386, 5.4%) roots. Males displayed additional canals more frequently in the distal root (P = 0.02). C-shaped anatomy was found in 5.7%. Among the C-shapes, the most common was Melton's Type III in the coronal (50%), middle (81%) and apical (72%) thirds.Conclusion: In this population, mandibular second molar teeth exhibited diverse morphology, which would have clinical significance for endodontic practitioners. The Ahmed et al. classification provided a better description than the Vertucci classification.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":" ","pages":"226-231"},"PeriodicalIF":1.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9923481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Apically extruded debris, canal transportation, and shaping ability of nickel-titanium instruments on contracted endodontic cavities in molar teeth. 镍钛器械对磨牙收缩根管腔的顶端挤压碎片、管内运输和成形能力。

IF 1.9 4区医学

Journal of oral science Pub Date : 2023-10-01 Epub Date: 2023-08-03 DOI: 10.2334/josnusd.23-0050

Qinqin Zhang, Jingyi Gu, Jiadi Shen, Ming Ma, Ying Lv, Xin Wei

{"title":"Apically extruded debris, canal transportation, and shaping ability of nickel-titanium instruments on contracted endodontic cavities in molar teeth.","authors":"Qinqin Zhang, Jingyi Gu, Jiadi Shen, Ming Ma, Ying Lv, Xin Wei","doi":"10.2334/josnusd.23-0050","DOIUrl":"10.2334/josnusd.23-0050","url":null,"abstract":"Purpose: Apically extruded debris, canal transportation and shaping ability were compared between contracted endodontic cavities (CECs) and traditional endodontic cavities (TECs) after instrumentation with XP-endo Shaper (XPS), ProTaper Gold (PTG), ProTaper for hand-use (HPT) and Hero Shaper.Methods: The CECs or TECs groups were sub-divided into 24 groups according to root canal morphology and nickel-titanium (Ni-Ti) instruments. The weight of apically extruded debris was calculated using the Myers and Montgomery model. Pre- and postoperative images of teeth were scanned using micro-CT and the three-dimensional models were constructed and compared.Results: Under CECs or TECs, XPS and PTG produced less apical debris and formed less canal transportation than HPT and Hero Shaper (P < 0.05). XPS group under CECs extruded less apical debris than that under TCEs for round canals with curvature of 20°-35° (P < 0.05). The centering ratios of four tested instruments were higher under TECs than those under CECs (P < 0.05). The HPT and Hero Shaper had more transportation under CECs than that under TCEs (P < 0.05). No statistical difference was found regarding shaping ability among all the groups.Conclusion: Under CECs, XPS preserves the original root canal anatomy, meanwhile it produces less apical debris than the other instruments.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":" ","pages":"203-208"},"PeriodicalIF":1.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9929352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of bleaching on the color match of single-shade resin composites. 漂白对单色树脂复合材料配色的影响。

IF 1.9 4区医学

Journal of oral science Pub Date : 2023-10-01 Epub Date: 2023-08-03 DOI: 10.2334/josnusd.23-0159

Eleonora Forabosco, Ugo Consolo, Claudia Mazzitelli, Shaniko Kaleci, Luigi Generali, Vittorio Checchi

{"title":"Effect of bleaching on the color match of single-shade resin composites.","authors":"Eleonora Forabosco, Ugo Consolo, Claudia Mazzitelli, Shaniko Kaleci, Luigi Generali, Vittorio Checchi","doi":"10.2334/josnusd.23-0159","DOIUrl":"10.2334/josnusd.23-0159","url":null,"abstract":"Purpose: To evaluate the color match of single-shade resin composites before and after bleaching procedures, through instrumental and visual analyses.Methods: Class V cavities were created on the buccal surfaces of 80 extracted human molars, restored with 4 single-shade composites (Omnichroma; Clearfil Majesty ES-2 Universal; Essentia Universal; Venus Diamond One). A spectrophotometer (VITA Easyshade V) was used to evaluate the tooth/resin color match before (T0), and 24 h (T1) and one week (T2) after dental bleaching (Opalescence Boost PF 40%). Color variations (ΔE00) were calculated and statistically analyzed (P < 0.05). Visual analysis was performed before and after tooth bleaching.Results: Spectrophotometric evaluations revealed statistically significant differences between materials at T0, T1, and T2 (P < 0.05). Visual analysis reported excellent and very good grades (0 and 1, respectively), irrespective of the materials and timepoints.Conclusion: Data seem to indicate that single shade composites are able to shift their color when the surrounding tooth undergoes bleaching effects. Single-shade composites seem to achieve a good color match with the surrounding tooth structure, before and after professional bleaching.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":" ","pages":"232-236"},"PeriodicalIF":1.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9923474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3