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Book ; Thesis: Involvement of the temporomandibular joint in rheumtoid arthritis

Zwahlen, Roger Arthur

a clinical and radiological study in collaboration with the Institute of Rheumatology and Physical Medicine from the University hospital of Zurich

2001

Author's details	vorgelegt von Roger Arthur Zwahlen
Language	English
Size	32 Bl. : Ill., graph. Darst.
Publishing country	Switzerland
Document type	Book ; Thesis
Thesis / German Habilitation thesis	Zürich, Univ., Diss., 2001
HBZ-ID	HT013180316
Database	Catalogue ZB MED Medicine, Health

In stock of ZB MED Cologne/Königswinter

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2001 E 2889	order for loan	Magazin

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Article: Distraction Osteogenesis in a Tessier 6 Cleft After Fronto-Orbito-Zygomatic Osteotomy - A Case Report.

Bütow, Kurt-Wilhelm / Eroğlu, Çağla / Zwahlen, Roger Arthur

Annals of maxillofacial surgery

2022 Volume 11, Issue 2, Page(s) 306–308

Abstract: The rationale: Craniofacial clefts are rare malformations. According to their localization, 15 types are classified.: Patient concerns: They referred to impaired eyelid function, lateral protection of the eye-bulb, and aesthetic appearance.: ... ...

Abstract	The rationale: Craniofacial clefts are rare malformations. According to their localization, 15 types are classified. Patient concerns: They referred to impaired eyelid function, lateral protection of the eye-bulb, and aesthetic appearance. Diagnosis: A three-dimensional-computerized tomography scan and a stereolithographic model led to the diagnosis of a rare intraorbital Tessier 6 cleft. Treatment: A newly designed lateral orbital rim osteotomy, presurgically simulated on a stereolithographic model, was performed to forward position the lateral orbital rims bilaterally by osteodistraction. Outcomes: Both lateral orbital rims were distracted anteriorly for around 12 mm over a period of 9 weeks, without any side effects to the patient. Take-away lessons: In this intraorbital Tessier 6 cleft, an improved eyelid function with better lateral protection of the eye bulb and more favorable aesthetic appearance was achieved with this novel lateral orbital rim osteotomy.
Language	English
Publishing date	2022-02-01
Publishing country	India
Document type	Case Reports
ZDB-ID	2696991-9
ISSN	2249-3816 ; 2231-0746
ISSN (online)	2249-3816
ISSN	2231-0746
DOI	10.4103/ams.ams_188_21
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Holoprosencephaly with Clefts: Data of 85 Patients, Treatment, and Outcome: Part 2: Management, Surgical Treatment, and Unexpected Aspects of Holoprosencephaly Cleft Patients.

Butow, Kurt W / Zwahlen, Roger Arthur

Annals of maxillofacial surgery

2019 Volume 9, Issue 1, Page(s) 146–151

Abstract: Context: Cleft patients with holoprosencephaly (HPE) provide a wide clinical spectrum. Besides accessory agenesis of facial tissue structures, spanning from a single central incisor to the columella, up to the entire prolabium-premaxilla complex, brain ... ...

Abstract	Context: Cleft patients with holoprosencephaly (HPE) provide a wide clinical spectrum. Besides accessory agenesis of facial tissue structures, spanning from a single central incisor to the columella, up to the entire prolabium-premaxilla complex, brain deformities with various functional deficits may prevail, just like normal brain development. Making a precise diagnosis, just like choosing the most appropriate treatment plan often is challenging. A literature and chart review comprising 85 HPE cleft cases at the Cleft Clinic of the University of Pretoria, South Africa, was performed. It yielded pertinent diagnostic criteria and collected information about pregnancy history, brain development and survival rate as well as the initial perioperative management and the course of postsurgical midfacial growth. Aims of part 2: The aim is to highlight how the here presented classification system of HPE cleft patients according to their clinical picture may facilitate the most appropriate treatment protocol. Materials and methods: The classification system elaborated in Part I due to diagnostic criteria facilitated establishing classification related treatment protocol for 85 cleft cases with HPE. Results: According to diagnostic criteria, HPE cleft cases can be subdivided into (1) columella complex agenesis (Ag-Colum), (2) prolabium-premaxilla-columella complex agenesis in cleft lip-alveolus deformities (Ag-CLA), (3) prolabium-premaxilla-columella complex agenesis in complete hard and soft palate clefts (Ag-CLAP), and (4) "standard" uni-or bilateral CLA or CLAP (HPE-Std-cleft), including cases with an atrophic premaxilla with or without single central incisors. Relevant treatment protocols according to the particular classification are highlighted with figures and intra-operative pictures. Conclusion: This paper addresses the following aspects in cleft patients with HPE: A subdivision into four groups, the 3-in-1 surgical approach, the anteriorly directed midfacial growth and maternal HIV infection.
Language	English
Publishing date	2019-05-31
Publishing country	India
Document type	Journal Article
ZDB-ID	2696991-9
ISSN	2249-3816 ; 2231-0746
ISSN (online)	2249-3816
ISSN	2231-0746
DOI	10.4103/ams.ams_52_19
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Holoprosencephaly with Clefts: Data of 85 Patients, Treatment and Outcome: Part 1: History, Subdivisions, and Data on 85 Holoprosencephalic Cleft Patients.

Honey, Engela M / Bütow, Kurt W / Zwahlen, Roger Arthur

Annals of maxillofacial surgery

2019 Volume 9, Issue 1, Page(s) 140–145

Abstract: Context: Cleft patients with Holoprosencephaly (HPE) constitute a controversy due to a variable facial appearance. HPE appearance varies from only a columella to a prolabium-premaxilla complex agenesis up to a common unilateral or bilateral cleft lip ... ...

Abstract	Context: Cleft patients with Holoprosencephaly (HPE) constitute a controversy due to a variable facial appearance. HPE appearance varies from only a columella to a prolabium-premaxilla complex agenesis up to a common unilateral or bilateral cleft lip and palate with a single central incisor, various brain deformities, and/or even normal brain development. It is challenging to designate such various appearances, to understand their etiopathogenesis, and to choose the most appropriate management. Literature was reviewed for diagnostic criteria, pregnancy history, clinical findings, brain development, survival rate, initial perioperative management, and postsurgical midfacial growth in cleft patients with HPE. The findings were compared with a clinical database of 85 cleft patients with HPE at the Department of Maxillofacial and Oral Surgery, University of Pretoria. Aims of part 1: The aim of the study is to overcome disparities widely existing among clinicians regarding definitive diagnostic criteria, especially in cases with a common appearance of a uni- or bilateral cleft lip alveolus or cleft lip, alveolus and palate deformity, and cases presenting facial structural agenesis. Materials and methods: A literature search related to diagnostic criteria was compared to results of a cleft HPE database from a single tertiary institution. Results: HPE cleft cases can be allocated to one of the following subdivisions: (1) columella complex agenesis (Ag-Colum), (2) prolabium-premaxilla-columella complex agenesis in cleft lip-alveolus deformities (Ag-CLA), (3) prolabium-premaxilla-columella agenesis in cases with complete cleft lip alveolus palate (Ag-CLAP), and (4) standard type (holoprosencephaly in patients with a standard cleft) with uni- or bilateral CLA or CLAP, hard and soft palate cleft (hPsP), and atrophic premaxillae, with or without single central incisor. Further, incidence, variation in brain development, and appearances in HPE cleft patients of different races and gender, epilepsy, and early death are discussed. Conclusion: This paper adds new data and facts to the existing literature related to cleft lip and palate patients suffering from HPE.
Language	English
Publishing date	2019-05-31
Publishing country	India
Document type	Journal Article
ZDB-ID	2696991-9
ISSN	2249-3816 ; 2231-0746
ISSN (online)	2249-3816
ISSN	2231-0746
DOI	10.4103/ams.ams_50_19
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: The Oropharyngeal Airway in Young Adults with Skeletal Class II and Class III Deformities: A 3-D Morphometric Analysis.

Jayaratne, Yasas Shri Nalaka / Zwahlen, Roger Arthur

PloS one

2016 Volume 11, Issue 2, Page(s) e0148086

Abstract: Objectives: 1) To determine the accuracy and reliability of an automated anthropometric measurement software for the oropharyngeal airway and 2) To compare the anthropometric dimensions of the oropharyngeal airway in skeletal class II and III deformity ... ...

Abstract	Objectives: 1) To determine the accuracy and reliability of an automated anthropometric measurement software for the oropharyngeal airway and 2) To compare the anthropometric dimensions of the oropharyngeal airway in skeletal class II and III deformity patients. Methods: Cone-beam CT (CBCT) scans of 62 patients with skeletal class II or III deformities were used for this study. Volumetric, linear and surface area measurements retroglossal (RG) and retropalatal (RP) compartments of the oropharyngeal airway was measured with the 3dMDVultus software. Accuracy of automated anthropometric pharyngeal airway measurements was assessed using an airway phantom. Results: The software was found to be reasonably accurate for measuring dimensions of air passages. The total oropharyngeal volume was significantly greater in the skeletal class III deformity group (16.7 ± 9.04 mm3) compared with class II subjects (11.87 ± 4.01 mm3). The average surface area of both the RG and RP compartments were significantly larger in the class III deformity group. The most constricted area in the RG and RP airway was significantly larger in individuals with skeletal class III deformity. The anterior-posterior (AP) length of this constriction was significantly greater in skeletal class III individuals in both compartments, whereas the width of the constriction was not significantly different between the two groups in both compartments. The RP compartment was larger but less uniform than the RG compartment in both skeletal deformities. Conclusion: Significant differences were observed in morphological characteristics of the oropharyngeal airway in individuals with skeletal class II and III deformities. This information may be valuable for surgeons in orthognathic treatment planning, especially for mandibular setback surgery that might compromise the oropharyngeal patency.
MeSH term(s)	Adolescent ; Adult ; Female ; Humans ; Imaging, Three-Dimensional/methods ; Male ; Malocclusion, Angle Class II/pathology ; Malocclusion, Angle Class III/pathology ; Pharynx/pathology ; Young Adult
Language	English
Publishing date	2016-02-22
Publishing country	United States
Document type	Journal Article
ISSN	1932-6203
ISSN (online)	1932-6203
DOI	10.1371/journal.pone.0148086
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: The evolution of dental journals from 2003 to 2012: a bibliometric analysis.

Jayaratne, Yasas Shri Nalaka / Zwahlen, Roger Arthur

PloS one

2015 Volume 10, Issue 3, Page(s) e0119503

Abstract: Bibliometrics are a set of methods, which can be used to analyze academic literature quantitatively and its changes over time. The objectives of this study were 1) to evaluate trends related to academic performance of dental journals from 2003 to 2012 ... ...

Abstract	Bibliometrics are a set of methods, which can be used to analyze academic literature quantitatively and its changes over time. The objectives of this study were 1) to evaluate trends related to academic performance of dental journals from 2003 to 2012 using bibliometric indices, and 2) monitor the changes of the five dental journals with the highest and lowest impact factor (IF) published in 2003. Data for the subject category "Dentistry, Oral Surgery & Medicine" was retrieved from the Journal Citation Reports (JCR) published from 2003 to 2012. Linear regressions analysis was used to determine statistical trends over the years with each bibliometric indicator as the dependent variable and the JCR year as the predictor variable. Statistically significant rise in the total number of dental journals, the number of all articles with the steepest rise observed for research articles, the number of citations and the aggregate IF was observed from 2003 to 2012. The analysis of the five top and five bottom-tire dental journals revealed a rise in IF however, with a wide variation in relation to the magnitude of this rise. Although the IF of the top five journals remained relatively constant, the percentile ranks of the four lowest ranking journals in 2003 increased significantly with the sharpest rise being noted for the British Journal of Oral & Maxillofacial Surgery. This study revealed significant growth of dental literature in absolute terms, as well as upward trends for most of the citation-based bibliometric indices from 2003 to 2012.
MeSH term(s)	Bibliometrics ; Dental Research/trends ; Dentistry ; Humans ; Periodicals as Topic/trends ; Publishing/statistics & numerical data ; Time Factors
Language	English
Publishing date	2015
Publishing country	United States
Document type	Journal Article
ISSN	1932-6203
ISSN (online)	1932-6203
DOI	10.1371/journal.pone.0119503
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Pierre Robin sequence: Subdivision, data, theories, and treatment - Part 2: Syndromic and nonsyndromic Pierre Robin sequence.

Bütow, Kurt-W / Morkel, Jean A / Naidoo, Sharan / Zwahlen, Roger Arthur

Annals of maxillofacial surgery

2016 Volume 6, Issue 1, Page(s) 35–37

Abstract: Context: The disorder currently accepted as Pierre Robin syndrome/anomaly/sequence (PRS) has been plagued by controversy ever since initially being described. Controversy exists not only about the appropriate terminology and etiopathogenesis of the ... ...

Abstract	Context: The disorder currently accepted as Pierre Robin syndrome/anomaly/sequence (PRS) has been plagued by controversy ever since initially being described. Controversy exists not only about the appropriate terminology and etiopathogenesis of the disorder but also about its management. Clinical findings and treatment outcomes of a large database of 266 PRS cases were compared with the current state of knowledge in the scientific literature, relating to history, clinical description, diagnostic criteria, epidemiology, theories of oligohydramnios, mandibular catch-up growth, midfacial hyperplasia, and the early management. Aims of part 2: Contribute to the sparse scientific knowledge about pathogenesis and involved genetics. Subjects and methods: An analysis of this large database was conducted focusing on genetic involvement, family history, and the incidence of additional syndromes. Results: Beside of differences related to clinical signs of dyspnea, feeding problems and mortality rates, various concomitant syndromes, and genetic abnormalities were found in cases of Fairbairn-Robin triad (FRT) and Siebold-Robin sequence (SRS), in addition to differences in relation to clinical signs of dyspnea, feeding problems, and mortality rates. Conclusion: Multiple FRT cases presented with various concomitant syndromes and genetic abnormalities, but only one type occurred in two SRS cases. The latter presented a significantly different mortality rate when compared to the FRT subgroup.
Language	English
Publishing date	2016-08-11
Publishing country	India
Document type	Journal Article
ZDB-ID	2696991-9
ISSN	2249-3816 ; 2231-0746
ISSN (online)	2249-3816
ISSN	2231-0746
DOI	10.4103/2231-0746.186134
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Pierre Robin sequence: Subdivision, data, theories, and treatment - Part 4: Recommended management and treatment of Pierre Robin sequence and its application.

Bütow, Kurt-W / Naidoo, Sharan / Zwahlen, Roger Arthur / Morkel, Jean A

Annals of maxillofacial surgery

2016 Volume 6, Issue 1, Page(s) 44–49

Abstract	Context: The disorder currently accepted as Pierre Robin syndrome/anomaly/sequence (PRS) has been plagued by controversy ever since initially being described. Controversy exists not only about the appropriate terminology and etiopathogenesis of the disorder but also about its management. Therefore, clinical findings and treatment outcomes of a large database of 266 PRS cases were compared with the current state of knowledge in the scientific literature related to history, clinical description, diagnostic criteria, epidemiology, theories of oligohydramnios, mandibular catch-up growth, midfacial hyperplasia, and early management. Aims of part 4: To provide a systematic treatment protocol for Fairbairn-Robin triad (FRT) and Siebold Robin sequence (SRS) patients based on clinical findings and experience with 266 PRS cases. Subjects and methods: A plethora of treatment modalities and their outcome in literature have been compared to those applied in this database and their outcomes. Results: The management of SRS/FRT depends on various factors including compromised airways, feeding difficulties, as well as the sequence of the reconstructive ladder. Conclusion: Based on the novel PRS subdivisions, a stepwise sequential treatment approach is outlined, addressing the particular needs of each disorder systematically.
Language	English
Publishing date	2016-08-11
Publishing country	India
Document type	Journal Article
ZDB-ID	2696991-9
ISSN	2249-3816 ; 2231-0746
ISSN (online)	2249-3816
ISSN	2231-0746
DOI	10.4103/2231-0746.186136
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Pierre Robin sequence: Subdivision, data, theories, and treatment - Part 3: Prevailing controversial theories related to Pierre Robin sequence.

Bütow, Kurt-W / Zwahlen, Roger Arthur / Morkel, Jean A / Naidoo, Sharan

Annals of maxillofacial surgery

2016 Volume 6, Issue 1, Page(s) 38–43

Abstract	Context: The disorder currently accepted as Pierre Robin syndrome/anomaly/sequence (PRS) has been plagued by controversy ever since initially being described. Controversy exists not only about the appropriate terminology and etiopathogenesis of the disorder but also about its management. Therefore, clinical findings and treatment outcomes of a large database of 266 PRS cases were compared with the current state of knowledge in the scientific literature related to history, clinical description, diagnostic criteria, epidemiology, theories of oligohydramnios, mandibular catch-up growth, midfacial hyperplasia, and the early management. Aim: The aims of Part 3 debate the controversial biological theories relating to PRS. Materials and methods: Oligo-/poly-hydramnios, mandibular catch-up growth, and midfacial hyperplasia, the three in the literature most prevailing theories related to PRS, have been compared and discussed with the findings provided by this large database of 266 Siebold-Robin sequence (SRS) and Fairbairn-Robin triad (FRT) cases. Results: History and clinical findings evaluated in this database refute the first two theories. Although manifold midfacial appearances were demonstrated in FRT cases, a third of all SRS cases presented with mid-facial hyperplasia. Conclusion: The three main biological theories regarding PRS could not be verified after thorough analysis of the database.
Language	English
Publishing date	2016-08-11
Publishing country	India
Document type	Journal Article
ZDB-ID	2696991-9
ISSN	2249-3816 ; 2231-0746
ISSN (online)	2249-3816
ISSN	2231-0746
DOI	10.4103/2231-0746.186135
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Pierre Robin sequence: Subdivision, data, theories, and treatment - Part 1: History, subdivisions, and data.

Bütow, Kurt-W / Zwahlen, Roger Arthur / Morkel, Jean A / Naidoo, Sharan

Annals of maxillofacial surgery

2016 Volume 6, Issue 1, Page(s) 31–34

Abstract	Context: The disorder currently accepted as Pierre Robin syndrome/anomaly/sequence (PRS) has been plagued by controversy ever since initially being described. Controversy exists not only about the appropriate terminology and etiopathogenesis of the disorder but also about its management. Therefore, clinical findings and treatment outcomes of a large database of 266 PRS cases were compared with the current state of knowledge in scientific literature related to history, clinical description, diagnostic criteria, epidemiology, theories of oligohydramnios, mandibular catch-up growth, midfacial hyperplasia, and the timing of management. Aims of part 1: Display disparities of the widely published subject of PRS that exist within the literature. Subjects and methods: A literature search related to diagnostic criteria was compared to findings of one of the largest PRS databases worldwide. Results: Regarding diagnostic criteria two subdivisions, the Fairbairn-Robin triad (FRT) and the Siebold-Robin sequence (SRS) can be clearly distinguished. Both present with micrognathia and glossoptosis, the former with, the latter, however, without a palatal cleft. Conclusions: According to clear diagnostic criteria, PRS has to be subdivided in the future into FRT and SRS cases, as they may require different treatment approaches.
Language	English
Publishing date	2016-08-25
Publishing country	India
Document type	Journal Article
ZDB-ID	2696991-9
ISSN	2249-3816 ; 2231-0746
ISSN (online)	2249-3816
ISSN	2231-0746
DOI	10.4103/2231-0746.186133
Database	MEDical Literature Analysis and Retrieval System OnLINE

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