Angle Orthodontist最新文献_第6页

Effects of different distalization directions and methods on maxillary total distalization with clear aligners: a finite element study. 不同的矫治方向和方法对使用透明矫治器进行上颌总矫治的影响：一项有限元研究。

IF 3 2区医学

Angle Orthodontist Pub Date : 2023-05-01 DOI: 10.2319/072622-519.1

Kyoung-Ho Kwak, Sewoong Oh, Youn-Kyung Choi, Sung-Hun Kim, Seong-Sik Kim, Soo-Byung Park, Yong-Il Kim

{"title":"Effects of different distalization directions and methods on maxillary total distalization with clear aligners: a finite element study.","authors":"Kyoung-Ho Kwak, Sewoong Oh, Youn-Kyung Choi, Sung-Hun Kim, Seong-Sik Kim, Soo-Byung Park, Yong-Il Kim","doi":"10.2319/072622-519.1","DOIUrl":"10.2319/072622-519.1","url":null,"abstract":"Objectives: To analyze the effects of maxillary tooth distalization by clear aligner (CA) treatment with variations in the angular direction of the distalization force, presence of attachments, and force-application method used.Materials and methods: A finite element model containing alveolar bone, dentition, and periodontal ligament was constructed. Analytical model groups were as follows: (1) distalization with buttons (without attachments), (2) buttons on canines (with attachments), (3) precision cuts on the canines (without attachments), and (4) precision cuts on the canines (with attachments). A distalization force of 1.5 N was applied to the button or precision cut at -30°, -20°, -10°, 0°, 10°, 20°, and 30° to the occlusal plane.Results: As the direction of force approached +30°, the dentition inclined posteriorly. The posterior movement pattern was significantly influenced by the presence of an attachment and the direction of force, rather than the area where the force was applied. Distal inclination was dramatically reduced with attachments. A disengagement or deformation of the CA may reduce the distalization efficiency of the dentition or move the dentition in an inappropriate direction.Conclusions: Attachments for efficient distalization by the CA are necessary. The use of miniscrews in the direction of force parallel to the occlusal plane is more advantageous than the use of Class II elastics. Due to CA deformation, distalization with the button on the canines can be more effective for distal movement of the maxillary dentition.","PeriodicalId":50790,"journal":{"name":"Angle Orthodontist","volume":" ","pages":"348-356"},"PeriodicalIF":3.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10117206/pdf/i1945-7103-93-3-348.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9734708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Occlusal contacts and treatment with the Invisalign appliance: a retrospective analysis of predicted vs achieved outcomes. 咬合接触和隐适美矫正器的治疗：预测结果与实现结果的回顾性分析。

IF 3 2区医学

Angle Orthodontist Pub Date : 2023-05-01 DOI: 10.2319/102822-738.1

Emma Bowman, Patrick Bowman, Tony Weir, Craig Dreyer, Maurice J Meade

{"title":"Occlusal contacts and treatment with the Invisalign appliance: a retrospective analysis of predicted vs achieved outcomes.","authors":"Emma Bowman, Patrick Bowman, Tony Weir, Craig Dreyer, Maurice J Meade","doi":"10.2319/102822-738.1","DOIUrl":"10.2319/102822-738.1","url":null,"abstract":"Objectives: To quantify the predicted occlusal contact outcomes compared with the clinically achieved occlusal contacts following treatment using the Invisalign aligner appliance.Materials and methods: The occlusal contacts of 33 adult patients presenting with a Class I mild-to-moderate malocclusion (spacing <4 mm or crowding of <6 mm) and treated using the Invisalign appliance were measured at the initial, predicted, and achieved stages of treatment by the metrology software Geomagic Control X. Assessed measurements were related to individual teeth and anterior, posterior, and overall contacts.Results: The mean (standard deviation) difference between the achieved occlusal contact was significantly less than that predicted for overall occlusal contact and posterior occlusal contact (P < .0025). The achieved posterior occlusal contact was also less than pretreatment initial posterior occlusal contact. There was no difference in anterior occlusal contact between the predicted and achieved outcomes (P > .05). The central and lateral incisors displayed no statistically significant difference between the predicted and achieved occlusal contact. The patients with prescribed overcorrection demonstrated a statistically significant difference in predicted occlusal contact compared with those with nonprescribed overcorrection (P ≤ .0025), but no statistically significant difference in achieved occlusal contact.Conclusions: Treatment by the Invisalign appliance in Class I mild-to-moderate malocclusion resulted in a decrease in posterior occlusal contact. Further research is required to account for the deficiencies between the predicted and achieved clinical outcome related to occlusal contact and to determine the corrective changes required in the treatment protocols.","PeriodicalId":50790,"journal":{"name":"Angle Orthodontist","volume":" ","pages":"275-281"},"PeriodicalIF":3.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10117214/pdf/i1945-7103-93-3-275.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9735229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Association between arch width changes and long-term stability 20 years after orthodontic treatment with and without extractions. 有无拔牙正畸治疗 20 年后牙弓宽度变化与长期稳定性之间的关系。

IF 3 2区医学

Angle Orthodontist Pub Date : 2023-05-01 DOI: 10.2319/080822-557.1

Vjera Perkovic, Moody Alexander, Preston Greer, Ervin Kamenar, Sandra Anic-Milosevic

{"title":"Association between arch width changes and long-term stability 20 years after orthodontic treatment with and without extractions.","authors":"Vjera Perkovic, Moody Alexander, Preston Greer, Ervin Kamenar, Sandra Anic-Milosevic","doi":"10.2319/080822-557.1","DOIUrl":"10.2319/080822-557.1","url":null,"abstract":"Objectives: To investigate long-term stability 20 years after orthodontic treatment and the association with arch width changes during treatment.Materials and methods: This retrospective study investigated 103 patients with Class I and II malocclusions treated with fixed appliances with and without extractions. The sample was treated by one experienced orthodontist and collected from a private orthodontic office. Dental casts were obtained pretreatment (T1), posttreatment (T2), and long-term postretention (T3); they were scanned and converted to STL files. Measurements were evaluated in for the upper and lower arch: intercanine width (IC), intermolar (IM) width, Little's irregularity index (LII).Results: There were 73 female and 30 male patients. Class I was present in 74 patients and Class II in 29. Average postretention time was 17.2 (±6.5) years after an average active retention time of 3.4 (±1.17) years. Extraction was performed in 55 patients while 48 received nonextraction treatment. Bonferroni Post Hoc test showed that LII in the upper and lower arches at T1 was significantly higher in the extraction group (P < .001). Upper and lower arch LII at T3 was slightly higher in extraction cases but remained under 2.05 mm. LII at T3 in the upper and lower arches showed negative correlation with IM T3 in the upper arch (Pearson, N = 103, P = .047), while IC in the upper and lower arches at T3 correlated with IM T3 in the upper and lower (N = 103, P < .001).Conclusions: Clinically relevant long-term stability in both arches was found in extraction and nonextraction cases. Intermolar width and its change during orthodontic treatment was an influential factor on long-term stability in extraction cases.","PeriodicalId":50790,"journal":{"name":"Angle Orthodontist","volume":" ","pages":"261-268"},"PeriodicalIF":3.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10117210/pdf/i1945-7103-93-3-261.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9381294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improvement in the transverse dimension of dental arches in mixed dentition patients with posterior crossbite treated with functional therapy. 通过功能疗法改善混合牙列后交叉咬合患者的牙弓横向尺寸。

IF 3 2区医学

Angle Orthodontist Pub Date : 2023-05-01 DOI: 10.2319/091622-647.1

Alessandro Tortarolo, Laura di Benedetto, Ingrid Tonni, Michele Tepedino, Teresa Vallelonga, Maria Grazia Piancino

{"title":"Improvement in the transverse dimension of dental arches in mixed dentition patients with posterior crossbite treated with functional therapy.","authors":"Alessandro Tortarolo, Laura di Benedetto, Ingrid Tonni, Michele Tepedino, Teresa Vallelonga, Maria Grazia Piancino","doi":"10.2319/091622-647.1","DOIUrl":"10.2319/091622-647.1","url":null,"abstract":"Objectives: To evaluate the effects of treatment of posterior crossbite (PXB) in the mixed dentition with the Function Generating Bite (FGB) appliance on the transverse dimension of the dental arches.Materials and methods: This study included 84 PXB patients (female = 46; male = 38; mean age, 8.2 ± 1.8 years) and 69 control (C) patients (female = 31; male = 38; mean age, 8.9 ± 1.4 years). Measurements were taken with digital calipers on maxillary and mandibular study casts before (T0) and after (T1) treatment for the following measures: intermolar (IMD), intermolar gingival (IMGD), intercanine (ICD), and intercanine gingival distances (ICGD).Results: At T0, there was a significant difference in all maxillary measurements between the PXB and C groups (P < .001), reflecting maxillary hypoplasia in PXB patients. At T1, there was no difference between the groups. In PXB patients, the mean increase between T0 and T1 for IMD was 4.34 ± 2.42 mm; this difference measured 3.51 ± 2.19 mm for IMGD, 2.78 ± 2.37 mm for ICS, and 1.89 ± 1.7 mm for ICGD. There was no significant difference in mandibular measurements between groups at T0 and T1.Conclusions: Functional therapy with FGB is effective in significantly increasing the transverse dimension of the maxillary dental arch in PXB patients. Considering its efficacy in treating masticatory dysfunction, FGB may be considered a good treatment option for the correction of PXB in growing children.","PeriodicalId":50790,"journal":{"name":"Angle Orthodontist","volume":" ","pages":"289-295"},"PeriodicalIF":3.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10117205/pdf/i1945-7103-93-3-289.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9734709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of piezocision-assisted lower second molar protraction on periodontal tissues, alveolar bone height, and lower second molar root resorption. 压电切削辅助下第二磨牙牵引对牙周组织、牙槽骨高度和下第二磨牙根吸收的影响。

IF 3 2区医学

Angle Orthodontist Pub Date : 2023-05-01 DOI: 10.2319/090622-621.1

Elham S Abu Alhaija, Marwan M Al-Areqi, Raed AlShami, Emad F Al Maaitah, Ahed Al Wahadni

{"title":"Effect of piezocision-assisted lower second molar protraction on periodontal tissues, alveolar bone height, and lower second molar root resorption.","authors":"Elham S Abu Alhaija, Marwan M Al-Areqi, Raed AlShami, Emad F Al Maaitah, Ahed Al Wahadni","doi":"10.2319/090622-621.1","DOIUrl":"10.2319/090622-621.1","url":null,"abstract":"Objectives: To assess the effect of piezocision on periodontal tissues and alveolar bone height and to detect lower second molar root resorption in piezocision-assisted mandibular second molar protraction compared to no-piezocision molar protraction.Materials and methods: Twenty-one subjects (four males, 17 females, aged 22.43 ± 2.83 years) who presented with bilateral extraction of lower first molars were included. The patients were divided into two groups; Group 1: Piezocision-assisted molar protraction (right or left side of subjects) in which piezocision was performed immediately before lower second molar protraction and, Group 2: No-piezocision molar protraction in which lower second molar protraction was not surgically assisted. Plaque index (PI), gingival index (GI), periodontal pocket depth (PPD), width of keratinized gingiva (WKG), gingival recession (GR), lower second molar mesial root resorption, alveolar bone height, and mandibular bone height were recorded at T1 (immediately before molar protraction) and at T2 (after second molar space closure).Results: In the piezocision-assisted molar protraction group, significant changes were detected in the WKG (P < .001), GR (P < .05), and the mandibular bone height (P < .001). Compared to the no-piezocision group, piezocision-assisted molar protraction resulted in an increased WKG (P < .001) and less second molar mesial root resorption (P < .01).Conclusions: Piezocision does not have any detrimental effect on the periodontium and produces less root resorption.","PeriodicalId":50790,"journal":{"name":"Angle Orthodontist","volume":" ","pages":"306-312"},"PeriodicalIF":3.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10117208/pdf/i1945-7103-93-3-306.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9380908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of palatal volume and surface changes between bone-borne and tooth-tissue-borne maxillary expansion on cone beam computed tomography digital cast models. 在锥形束计算机断层扫描数字铸模上比较骨载和牙组织载上颌骨扩张时腭部体积和表面的变化。

IF 3 2区医学

Angle Orthodontist Pub Date : 2023-05-01 DOI: 10.2319/040922-278.1

Reham Abdelsalam, Ludovica Nucci, Rossella Carrino, Shereef Shahen, Fatma Abdelaziz, Fady Fahim, Letizia Perillo

{"title":"Comparison of palatal volume and surface changes between bone-borne and tooth-tissue-borne maxillary expansion on cone beam computed tomography digital cast models.","authors":"Reham Abdelsalam, Ludovica Nucci, Rossella Carrino, Shereef Shahen, Fatma Abdelaziz, Fady Fahim, Letizia Perillo","doi":"10.2319/040922-278.1","DOIUrl":"10.2319/040922-278.1","url":null,"abstract":"Objectives: To compare the changes of palatal volume and area in patients treated with tooth-tissue-borne palatal expanders (conventional Haas) and miniscrew-supported palatal expanders (modified Haas).Materials and methods: The sample included casts of 22 patients treated as part of a clinical study at the Department of Orthodontics, Al-Azhar University, to correct their crossbite malocclusion. Patients were divided equally into two groups upon arrival. The first group, with a mean age of 12 years and 6 months, received the miniscrew-supported palatal expander. The second group, with a mean age of 12 years and 2 months, received the Haas design-palatal expansion appliance. Pre- and post-expansion dental casts were cone beam computed tomography scanned and the slices were constructed into 3D volumes. Fully automated superimposition was done for pre- and post-expansion 3D models. Palatal volume and area were determined, and all measurements were carried out blindly. Paired t-test was used to assess the mean differences within each group and Welch's t-test was applied to assess the mean changes between the two groups. Shapiro-Wilk test was used to test for the normality of the data.Results: There were no statistical differences in volume changes either within each group or between the groups. Although area changes were statistically significant within each group, the difference between the groups was not significant.Conclusions: Changes that result from the use of either method to expand the upper arch occur primarily in the shape of the palate, but not in its size.","PeriodicalId":50790,"journal":{"name":"Angle Orthodontist","volume":" ","pages":"282-288"},"PeriodicalIF":3.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10117217/pdf/i1945-7103-93-3-282.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9734711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of thin bony structures using cone-beam computed tomography. 使用锥形束计算机断层扫描评估薄骨结构。

IF 3 2区医学

Angle Orthodontist Pub Date : 2023-05-01 DOI: 10.2319/090922-633.1

Camilla Lennholm, Anna Westerlund, Henrik Lund

{"title":"Assessment of thin bony structures using cone-beam computed tomography.","authors":"Camilla Lennholm, Anna Westerlund, Henrik Lund","doi":"10.2319/090922-633.1","DOIUrl":"10.2319/090922-633.1","url":null,"abstract":"Objectives: To investigate the validity and reliability of marginal bone level measurements on cone-beam computed tomography (CBCT) images of thin bony structures using various reconstruction techniques, two image resolutions, and two viewing modes.Materials and methods: CBCT and histologic measurements of the buccal and lingual aspects of 16 anterior mandibular teeth from 6 human specimens were compared. Multiplanar (MPR) and three-dimensional (3D) reconstructions, standard and high resolutions, and gray scale and inverted gray scale viewing modes were assessed.Results: Validity of radiologic and histologic comparisons were highest using the standard protocol, MPR, and the inverted gray scale viewing mode (mean difference = 0.02 mm) and lowest using a high-resolution protocol and 3D-rendered images (mean difference = 1.10 mm). Mean differences were significant (P < .05) at the lingual surfaces for both reconstructions, viewing modes (MPR windows), and resolutions.Conclusions: Varying the reconstruction technique and viewing mode does not improve the observer's ability to visualize thin bony structures in the anterior mandibular region. The use of 3D-reconstructed images should be avoided when thin cortical borders are suspected. The small difference when using a high-resolution protocol is unjustified due to the higher radiation dose required. Previous studies have focused on technical parameters; the present study explores the next link in the imaging chain.","PeriodicalId":50790,"journal":{"name":"Angle Orthodontist","volume":" ","pages":"328-334"},"PeriodicalIF":3.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10117211/pdf/i1945-7103-93-3-328.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9381315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fixation of an orthodontic anchor screw using beta-tricalcium phosphate in a screw-loosening model in rats. 在大鼠螺钉松动模型中使用 beta 磷酸三钙固定正畸固定螺钉。

IF 3 2区医学

Angle Orthodontist Pub Date : 2023-05-01 DOI: 10.2319/080822-558.1

Kie Nishioka-Sakamoto, Hitoshi Hotokezaka, Yuka Hotokezaka, Yukako Nashiro, Mariko Funaki, Seigo Ohba, Noriaki Yoshida

{"title":"Fixation of an orthodontic anchor screw using beta-tricalcium phosphate in a screw-loosening model in rats.","authors":"Kie Nishioka-Sakamoto, Hitoshi Hotokezaka, Yuka Hotokezaka, Yukako Nashiro, Mariko Funaki, Seigo Ohba, Noriaki Yoshida","doi":"10.2319/080822-558.1","DOIUrl":"10.2319/080822-558.1","url":null,"abstract":"Objectives: To create an orthodontic anchor screw (OAS)-loosening model and to investigate whether filling the bone hole with beta-tricalcium phosphate (β-TCP) can fix the OAS against orthodontic force.Materials and methods: Bone holes with different diameters (1.6, 2.1, or 2.5 mm) were drilled in the tibias of 11-week-old male Wistar rats, and an OAS (3.0 mm in length and 1.2 mm in diameter) was inserted. After a healing period of 2 or 4 weeks, orthodontic force was applied, and the diameter of the bone hole appropriate for the loosening model was determined. Subsequently, under the loosening model, the bone hole was filled with β-TCP, orthodontic force was applied, and movement of the OAS and surrounding tissue changes were evaluated by micro-computed tomography images and histological specimen analysis.Results: The bone hole of 1.6 mm in diameter was employed as the OAS-loosening model. When β-TCP was inserted into the bone hole, the linear distance and mesial tipping angle of the OAS movement decreased markedly. Furthermore, the values of bone morphometry significantly increased with β-TCP filling.Conclusions: An OAS-loosening model was established in rats and demonstrated that the loosening OAS was stabilized by β-TCP filling through bone formation. β-TCP may be useful for fixation of a loosening OAS.","PeriodicalId":50790,"journal":{"name":"Angle Orthodontist","volume":" ","pages":"341-347"},"PeriodicalIF":3.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10117216/pdf/i1945-7103-93-3-341.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9380912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of efficacy of utility arch with inter-maxillary elastics for treating skeletal deep bite with retroclined upper incisors in the mixed dentition: a clinical randomized controlled trial. 用颌间牵引器治疗混合牙列上切牙后倾骨骼深咬合的功效评估：临床随机对照试验。

IF 3 2区医学

Angle Orthodontist Pub Date : 2023-05-01 DOI: 10.2319/072722-520.1

Danya Hassan Alsawaf, Nada Rajah

{"title":"Evaluation of efficacy of utility arch with inter-maxillary elastics for treating skeletal deep bite with retroclined upper incisors in the mixed dentition: a clinical randomized controlled trial.","authors":"Danya Hassan Alsawaf, Nada Rajah","doi":"10.2319/072722-520.1","DOIUrl":"10.2319/072722-520.1","url":null,"abstract":"Objectives: To investigate the effectiveness of utility arch (UA) with inter-maxillary elastics compared with fixed anterior bite plane (FABP) for treating deep bite in brachy-facial children.Materials and methods: This was a single-center, randomized controlled trial. Participants were children aged between 9 and 12 years with deep bite and a hypodivergent skeletal pattern. The sample was divided into the following two groups: (1) a UA group that was composed of patients with UAs with posterior inter-maxillary elastics and (2) an FABP group as a control. Outcomes were skeletal and dentoalveolar variables on cephalometric X-rays.Results: A total of 28 patients (13 boys, 15 girls) with a mean age of 10.66 years were enrolled. The treatment duration was 8.16 months in the UA group and 7.22 months in the FABP group. After treatment, the angle between the anterior cranial base and the mandible in the vertical plane increased significantly (P = .000) in both groups (about 1.97 degrees in the UA group and 2.75 degrees in the FABP group). Overbite decreased significantly in both groups (-2.1 m in the UA group and -3.64 m in the FABP group), but it decreased less significantly in the UA group than in the FABP group. The upper incisors flared significantly after treatment with both appliances (6.6 degrees in the UA group and 5.9 degrees in the FABP group).Conclusions: Treatment of deep bite in children with a horizontal growth pattern by each of the appliances used in this study is effective. The mandible showed minor, significant backward rotation after treatment. The overbite decreased less in the UA group than in the FABP group.","PeriodicalId":50790,"journal":{"name":"Angle Orthodontist","volume":" ","pages":"296-305"},"PeriodicalIF":3.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10117215/pdf/i1945-7103-93-3-296.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9382072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Twenty-year follow-up of functional treatment with a bionator appliance (part 2): a retrospective cephalometric analysis of skeletal and dentoskeletal changes. 仿生矫治器功能治疗二十年随访（第二部分）：骨骼和牙槽骨变化的回顾性头颅测量分析。

IF 3 2区医学

Angle Orthodontist Pub Date : 2023-05-01 DOI: 10.2319/062922-462.1

Rebecca Jungbauer, Niko C Bock, Alois Schmid, Peter Proff, Ingrid Rudzki

{"title":"Twenty-year follow-up of functional treatment with a bionator appliance (part 2): a retrospective cephalometric analysis of skeletal and dentoskeletal changes.","authors":"Rebecca Jungbauer, Niko C Bock, Alois Schmid, Peter Proff, Ingrid Rudzki","doi":"10.2319/062922-462.1","DOIUrl":"10.2319/062922-462.1","url":null,"abstract":"Objectives: To investigate skeletal and dentoskeletal changes 20 years after bionator treatment.Materials and methods: Analog lateral cephalograms of 18 subjects treated with a bionator appliance during growth were digitized with a transmitted light scanner. Inclusion criteria were: increased overjet (≥4 mm), skeletal Class II, available lateral cephalograms before (T0), after (T1), and 20 years after (T2) treatment with only a Bionator. To assess standard cephalometric parameters, the software ivoris analyze was used. Data were analyzed using Friedman's two-way analysis of variance by ranks followed by Dunn's post hoc tests (P ≤ .05).Results: During therapy (T0-T1), ANB decreased significantly by 1.9° and remained unchanged long term. SNA slightly decreased (-0.6°) during treatment, SNB and SNPg increased (+1.4°, +1.7°). All three parameters showed a significant increase at T2 (+1.2°, +1.6°, +1.6°). Vertical measurements (ML-NL, ML-NSL, NL-NSL) remained almost unchanged during therapy. NL-NSL also was unchanged during the long-term interval; ML-NSL and ML-NL decreased significantly (-3.4°, -4.9°). During treatment, the maxillary incisors retroclined (OK1-NL: -1.6°, OK1-NA: -0.6°), the mandibular incisors proclined (UK1-ML: +3.5°, UK1-NB: +4.9°), neither significantly. Long term, there was a nonsignificant tendency toward proclination of upper (OK1-NL: +0.1°, OK1-NA: +0.7°) and retroclination of lower incisors (UK1-ML: -1.5°, UK1-NB: -5°).Conclusions: Changes of ANB after bionator treatment without additional fixed appliances remained stable after 20 years. The observed long-term changes are probably consequences of well-known physiological and age-related processes.","PeriodicalId":50790,"journal":{"name":"Angle Orthodontist","volume":" ","pages":"269-274"},"PeriodicalIF":3.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10117203/pdf/i1945-7103-93-3-269.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9374499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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