Knösel, Michael

[["dc.bibliographiccitation.firstpage","485"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","European Journal of Orthodontics"],["dc.bibliographiccitation.lastpage","492"],["dc.bibliographiccitation.volume","38"],["dc.contributor.author","Knoesel, Michael"],["dc.contributor.author","Klang, Elisabeth"],["dc.contributor.author","Helms, Hans-Joachim"],["dc.contributor.author","Wiechmann, Dirk"],["dc.date.accessioned","2018-11-07T10:07:43Z"],["dc.date.available","2018-11-07T10:07:43Z"],["dc.date.issued","2016"],["dc.description.abstract","Using lingual enamel surfaces for bracket placement not only has esthetic advantages, but may also be suitable in terms of reducing frequencies of enamel decalcifications. To test the null-hypothesis that there is no significant difference in enamel decalcification or cavitation incidence adjacent to and beneath bracket bases between two lingual multi-bracket (MB) appliances that are different in terms of design, material composition, and manufacturing technology (group A: WIN, DW-LingualSystems; group B: Incognito, 3M-Unitek), taking into account patient- and treatment-related variables on white spot lesion (WSL) formation. Standardized, digital, top-view photographs of 630 consecutive subjects (16214 teeth; n (Incognito) = 237/6076 teeth; n (WIN) = 393/10138 teeth; mean age: 17.47 +/- 7.8; m/f 43.2/56.8%) with completed lingual MB treatment of the upper and lower permanent teeth 1-7 were screened for decalcification or cavitation adjacent to and beneath the bracket bases before and after treatment, scored from 0 to 7. Non-parametric ANOVA was used for main effects 'appliance type', 'gender', 'treatment complexity', 'grouped age' (a parts per thousand currency sign16/> 16 years), and 'treatment duration' as covariable, at an alpha-level of 5%. About 2.57% [5.94%] of all teeth in group A [B] developed decalcifications. Subject-related incidence was 9.59% [16.17%] for upper incisors in group A [B], and 12.98% [25.74%] for all teeth 16-46. There were significant effects by gender, age, and treatment duration. The null-hypothesis was rejected: sub-bracket lesions were significantly less frequent in group A, while frequencies of WSL adjacent to brackets were not significantly affected by appliance type. In view of the overall low incidences of lingual post-orthodontic white-spot lesions, the use of lingual appliances is advocated as a valid strategy for a reduction of enamel decalcifications during orthodontic treatment."],["dc.identifier.doi","10.1093/ejo/cjv069"],["dc.identifier.isi","000386063200006"],["dc.identifier.pmid","26420772"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39331"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Oxford Univ Press"],["dc.relation.issn","1460-2210"],["dc.relation.issn","0141-5387"],["dc.title","Occurrence and severity of enamel decalcification adjacent to bracket bases and sub-bracket lesions during orthodontic treatment with two different lingual appliances"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","31"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Head & Face Medicine"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Wiechmann, Dirk"],["dc.contributor.author","Vu, Julius"],["dc.contributor.author","Schwestka-Polly, Rainer"],["dc.contributor.author","Helms, Hans-Joachim"],["dc.contributor.author","Knösel, Michael"],["dc.date.accessioned","2019-07-09T11:41:51Z"],["dc.date.available","2019-07-09T11:41:51Z"],["dc.date.issued","2015"],["dc.description.abstract","Abstract Objective To assess the types and frequencies of clinical complications experienced when using a modified lingual Herbst appliance and to compare these with those associated with conventional Herbst appliances reported in the literature. Methods Treatment records for 35 consecutive subjects treated during the observation period from October 2013 to August 2014 who received a combination of a lingual appliance and a modified Herbst appliance (WIN, DW LingualSystems) were assessed for complications linked to Herbst treatment phase. Complications were analyzed descriptively, and complication-free intervals were calculated using Kaplan-Meier plots. To enable a comparison with data reported in the literature, the cumulative treatment time for all subjects was divided by the total number of complications. Results 71.4 % of Herbst treatments were free from complications (n = 25). Complications were seen on 13 occasions (8 instances of Herbst attachment loosening, 5 L-Pin fractures). Most of these complications could be fixed chair side utilizing simple clinical measures. Considering all complications as identical statistical events, the percentage of treatments free from complications would be 88 % for 100 days, 70 % for 200 days and 56.8 % for 300 days. For severe complications, the averaged complication-free treatment interval was found to be 27.8 months. Conclusion In terms of clinical sturdiness, and taking into consideration the step-wise mode of activation used here as well as the differences in the design of the various Herbst appliances, the WIN-Herbst appliance was found to be superior to comparable vestibular Herbst appliances, as well as the banded Herbst appliance belonging to the preceding generation of customized lingual systems. Success in treatment of non-compliant Angle Class II correction is considered to have better predictability using the modified anchorage strategy of the WIN-Herbst appliance."],["dc.identifier.doi","10.1186/s13005-015-0088-3"],["dc.identifier.pmid","26353793"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/12484"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/58533"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Clinical complications during treatment with a modified Herbst appliance in combination with a lingual appliance"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Head & Face Medicine"],["dc.bibliographiccitation.volume","14"],["dc.contributor.author","Klang, Elisabeth"],["dc.contributor.author","Beyling, Frauke"],["dc.contributor.author","Knösel, Michael"],["dc.contributor.author","Wiechmann, Dirk"],["dc.date.accessioned","2020-12-10T18:39:01Z"],["dc.date.available","2020-12-10T18:39:01Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1186/s13005-018-0176-2"],["dc.identifier.eissn","1746-160X"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/77516"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Quality of occlusal outcome following space closure in cases of lower second premolar aplasia using lingual orthodontic molar mesialization without maxillary counterbalancing extraction"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","414"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","American Journal of Orthodontics and Dentofacial Orthopedics"],["dc.bibliographiccitation.lastpage","422"],["dc.bibliographiccitation.volume","148"],["dc.contributor.author","Wiechmann, Dirk"],["dc.contributor.author","Klang, Elisabeth"],["dc.contributor.author","Helms, Hans-Joachim"],["dc.contributor.author","Knoesel, Michael"],["dc.date.accessioned","2018-11-07T09:52:43Z"],["dc.date.available","2018-11-07T09:52:43Z"],["dc.date.issued","2015"],["dc.description.abstract","Introduction: The aim of this study was to assess the incidence of white spot lesions (WSLs) in subjects treated with customized lingual multibracket appliances-separately for maxillary anterior teeth 12 to 22 (according to the Federation Dentaire Internationale numbering system) as well as for tooth groups 15 to 45, 16 to 46, and 17 to 47-and to determine the impact of patient-related and treatment-related variables on the frequencies of new WSLs. Methods: Of 214 subjects comprehensively treated between June 1, 2011, and May 31, 2014, in 1 orthodontic center (Bad Essen, Germany) with a completely customized lingual appliance (WIN; DW Lingual Systems, Bad Essen, Germany), 174 (47% boys, 53% girls; mean age, 14.35 +/- 1.23 years [minimum, 11.35 years; maximum, 17.91 years]) were recruited with inclusion criteria of completed lingual multibracket treatment of their maxillary and mandibular permanent teeth 17 to 47 (4582 teeth in the study), and age less than 18 years at the initial appointment. WSL assessment was accomplished using standardized digital high-resolution maxillary and mandibular occlusal photographs taken before bracketing and after debonding. Nonparametric analysis of variance was performed, taking into account the subjects' grouped ages (< 16 or >16 years), sexes, and treatment durations. Results: Of the total population of subjects, 41.95% developed at least 1 new WSL when all teeth, 17 to 47, were considered, and this incidence was 27.01% for tooth group 16 to 46, or 10.59% of subjects and 4.74% of the maxillary incisors (12 to 22). Of all teeth under consideration, 3.19% developed a WSL during treatment. The frequencies of decalcification were not significantly increased in preadolescents (<= 16 years) compared with adolescents (>16 years). Treatment duration had a significant adverse impact on WSL formation in tooth groups 15 to 45 and 16 to 46, and in complete dental arches (teeth 17 to 47). Conclusions: Subject-related and tooth-related WSL incidences of both single tooth groups and complete dental arches in subjects treated with the lingual WIN appliance were distinctly reduced when compared with previous reports of enamel decalcification after conventional labial multibracket treatment."],["dc.identifier.doi","10.1016/j.ajodo.2015.05.015"],["dc.identifier.isi","000360549800014"],["dc.identifier.pmid","26321339"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/36184"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Mosby-elsevier"],["dc.relation.issn","1097-6752"],["dc.relation.issn","0889-5406"],["dc.title","Lingual appliances reduce the incidence of white spot lesions during orthodontic multibracket treatment"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","46"],["dc.bibliographiccitation.journal","Head & face medicine"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Knösel, Michael"],["dc.contributor.author","Klang, Elisabeth"],["dc.contributor.author","Helms, Hans-Joachim"],["dc.contributor.author","Wiechmann, Dirk"],["dc.date.accessioned","2015-06-03T13:07:53Z"],["dc.date.accessioned","2021-10-27T13:20:16Z"],["dc.date.available","2015-06-03T13:07:53Z"],["dc.date.available","2021-10-27T13:20:16Z"],["dc.date.issued","2014"],["dc.description.abstract","INTRODUCTION: The occurrence of side-effects of fixed orthodontic therapy, such as white-spot lesions and root resorption, are known to be significantly more frequent with increasing duration of treatment. Multi-bracket treatment should be as short as possible, in order to minimize the risks of collateral damage to teeth. The aim of this non-randomized clinical trial was to compare treatment duration with each of two types of customized lingual orthodontic appliances (Incognito, 3 M-Unitek; WIN, DW LingualSystems), taking into account treatment complexity. The null-hypothesis was that there would be no significant difference in active orthodontic treatment duration between them. METHODS: Of 402 potentially eligible participants, a population sample of n = 376 subjects (n(Incognito) = 220; n(WIN) = 156; m/f 172/204; mean age ± SD 17.3 ± 7.7Y) treated in one orthodontic center (Bad Essen, Germany) with completely customized lingual appliances in upper and lower permanent dental arches was recruited with the inclusion criterion of initiated and completed lingual multi-bracket treatment within the assessment period of April 1st 2010 - Nov 30, 2013, and the exclusion criterion of less than 24 bracketed teeth. We used four-factorial ANOVA to assess the impact of the following factors: initial degree of severity of malocclusion (mild to moderate, S1; severe, S2), appliance type (Incognito; WIN), sex, and age group (<=16; >16 Y) on the duration of lingual multi-bracket treatment. RESULTS: Overall, mean treatment duration was 21.7 (SD 7.2) months, which was significantly shorter for WIN for both sub-groups of treatment complexity (S1: 17.96 mo; S2: 20.49 mo) compared to Incognito (S1: 22.7 mo; S2: 29.79 mo). ANOVA revealed a significant influence of the main effects 'appliance type', and 'severity', independent of each other. Therefore, the null-hypothesis was rejected. CONCLUSION: In terms of treatment duration, the WIN appliance performed significantly better than the Incognito appliance. Consequently, subjects treated with the WIN appliance are expected to be exposed to lower risks of the typical side-effects associated with longer multi-bracket treatment durations, such as root resorption and enamel decalcification."],["dc.format.extent","12"],["dc.identifier.doi","10.1186/1746-160X-10-46"],["dc.identifier.pmid","25361639"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11842"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/91952"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.relation.issn","1746-160X"],["dc.relation.orgunit","Universitätsmedizin Göttingen"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.mesh","Adolescent"],["dc.subject.mesh","Female"],["dc.subject.mesh","Follow-Up Studies"],["dc.subject.mesh","Humans"],["dc.subject.mesh","Male"],["dc.subject.mesh","Malocclusion"],["dc.subject.mesh","Orthodontic Appliance Design"],["dc.subject.mesh","Orthodontic Brackets"],["dc.subject.mesh","Retrospective Studies"],["dc.subject.mesh","Time Factors"],["dc.subject.mesh","Treatment Outcome"],["dc.title","Lingual orthodontic treatment duration: performance of two different completely customized multi-bracket appliances (Incognito and WIN) in groups with different treatment complexities."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","11"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Head & Face Medicine"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Knösel, Michael"],["dc.contributor.author","Ellenberger, David"],["dc.contributor.author","Göldner, Yvonne"],["dc.contributor.author","Sandoval, Paulo"],["dc.contributor.author","Wiechmann, Dirk"],["dc.date.accessioned","2019-07-09T11:41:45Z"],["dc.date.available","2019-07-09T11:41:45Z"],["dc.date.issued","2015"],["dc.description.abstract","Background Sealant application during fixed appliances orthodontic treatment for enamel protection is common, however, reliable data on its durability in vivo are rare. Objective This study aims at assessing the durability of a sealant (OpalSeal, Ultradent) for protection against white-spot lesion formation in orthodontic patients over 26 weeks in vivo, taking into account the provision or absence of an adequate oral hygiene. We tested the null hypothesis of (1) no significant abatement of the sealant after 26 weeks in fixed orthodontic treatment compared to baseline, and (2) no significant influence of the factor of brushing and oral hygiene (as screened by approximal plaque index, API) on the abatement of the sealant. Methods Integrity and abatement of OpalSeal applicated directly following bracketing was assessed in thirty-six consecutive patients (nteeth = 796) undergoing orthodontic treatment with fixed appliances (male/female12/24; mean age/SD 14.4/1.33 Y). Assessment of the fluorescing sealant preservation was by a black-light lamp, using a classification that was concepted in analogy to the ARI index: (3, sealant completely preserved; 2= > 50% preserved; 1 = <50%; 0 = no sealant observable) immediately following application (Baseline, T0), after 2 (T1), 8 (T2), 14 (T3), 20 (T4) and 26 weeks (T5). API was assessed at T0 and T1. Statistical analysis was by non-parametric repeated measures ANOVA (α = 5%, power >80%). Results At baseline, 43.4% of teeth had a positive API. Oral hygiene deteriorated after bracketing (T1, 53%) significantly. Null hypothesis (1) was rejected, while (2) was accepted: Mean values of both the well brushed and non-brushed anterior teeth undercut the score “1” at T3 (week 14). Despite a slightly better preservation of the sealer before and after T3 in not-sufficiently brushed (API-positive) teeth, this finding was statistically not significant. Conclusion One single application of OpalSeal is unlikely to last throughout the entire fixed appliance treatment stage. On average, re-application of the sealant can be expected to be necessary after 3.5 months (week 14) in treatment."],["dc.identifier.doi","10.1186/s13005-015-0069-6"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/12304"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/58503"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","In-vivo durability of a fluoride-releasing sealant (OpalSeal) for protection against white-spot lesion formation in orthodontic patients"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]