The “Wits” appraisal of jaw disharmony

American Journal of Orthodontics 11/2003; 124(5):470–479. DOI: 10.1016/S0889-5406(03)00540-7

ABSTRACT Alex Jacobson was born in South Africa and completed his dental education there in 1941. He received an MS degree in orthodontics from the University of Illinois in Chicago in 1953 and then returned to South Africa to private practice. He was head of the orthodontic department at the University of Witwatersrand (known as Wits, hence the name “Wits” analysis). He received an MDS degree in 1961 and a PhD in physical anthropology in 1978 and was named chair of the orthodontic department at the University of Alabama at Birmingham in 1976. He returned to private practice and part-time teaching again in 1989. He has written or edited 3 textbooks and about 100 articles in refereed journals, and is editor of the Reviews and Abstracts section of the Journal.

  • [Show abstract] [Hide abstract]
    ABSTRACT: Diabetes mellitus is a metabolic disorder characterized by disturbed glucose regulation, manifesting primarily as chronic hyperglycemia. Today about 6% of the world's population suffers from diabetes mellitus. This metabolic disorder is known to be associated with a large number of concomitant and secondary diseases of the cardiovascular system, as well as of the joint and supporting tissue systems. It is also a recognized fact that diabetes mellitus is closely associated with diverse problems in the oral, facial and jaw regions. These facts suggest that patients with diabetes may respond to orthodontic treatment differently from those without diabetes in how the periodontium and surrounding visceral cranium react to therapy. Beginning with a clinical case report we proceed to present a general overview of the clinical features and pathophysiology of diabetes mellitus, followed by a critical discussion of the results of a systematic literature search for aspects of the disease relevant to orthodontics.
    Fortschritte der Kieferorthopädie 04/2009; 70(2):160-75. · 0.89 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: This study was designed to properly characterize the cephalometric values of Japanese individuals with both normal occlusion and esthetic profiles. Multivariate statistics were applied to analyze the collected data. Cephalometric values identified are expected to help in the simplification of orthodontic diagnosis. Lateral cephalometric radiographs from 50 men and 50 women with normal occlusion were traced and the dimensions of hard and soft tissues recorded. The corresponding values were classified by cluster analysis, and selected representative values were subjected to principal component analysis. From these values, characteristics of hard and soft tissue morphology were extracted. The subjects were grouped by sex, and subdivided into esthetic and unesthetic profile groups. The principal component scores from each group were plotted on a scattergram and the characteristics of each group investigated. The hard tissue characteristics in men with esthetic profiles were primarily vertical factors, including a tendency for smaller lower facial heights, a smaller mandibular plane angle, and a larger Nasion-ANS/ANS-Menton (N-ANS/ANS-Me). Soft tissue features included a more posteriorly placed maxilla and a high nasal crest. These features yield a less marked maxillary prognathism and a greater nose prominence. In females, hard tissue characteristics associated with esthetic profiles primarily involved the cranial base and posterior facial area. These included a smaller saddle angle, larger articulare angle, and smaller Sella-Articulare/Articlare-Gonion (S-Ar/Ar-Go). Female soft tissue characteristics primarily included retracted upper and lower lips, a shallow inferior sulcus with a smaller lower lip-Frankfort plane angle, and a shorter mentolabial sulcus and subnasale perpendicular-upper lip.
    Odontology 08/2007; 95(1):44-56. · 1.58 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Die vorliegende Studie zeigt die Variationen auf, denen die Punkte A und B sowie die Okklusionsebene bei der Festlegung durch sieben Durchzeichner unterliegen. Zudem werden zwei der vonJacobson [3, 4] angegebenen Methoden zur Festlegung der Okklusionsebene verglichen.Die Winkel SNA, SNB und ANB differieren bei den sieben Durchzeichnern wenig. Signifikant unterscheiden sich die Ergebnisse, die durch die beiden Methoden zur Festlegung der Okklusionsebene gefunden wurden. Die WITs-Beurteilung erscheint aus diesem Grunde fragwrdig. In diesem Zusammenhang wird auf den individualisierten ANB-Winkel nachPanagioditis u.Witt [5] verwiesen.This paper shows the variations produced when seven persons draw the points A and B and the occlusal plane. Two methods ofJacobson [3, 4] for fixing the occlusal plane are compared.SNA, SNB and ANB-angles show slight differences when being drawn by seven persons. The results of the two methods of fixing the occlusal plane show significant differences. Thus the WITs appraisal ofJacobson does not seem to be very helpful but the individualized ANB-angle ofPanagioditis andWitt [5] seems to be helpful in solving this problem.Ce travail montre les variations observes sur les tracs de sept personnes qui avaient dessin les points A et B et le plan occlusal. On compare aussi deux mthodes deJacobson [3, 4] servant tracer le plan d'occlusion.On ne note qu'une petite diffrence entre les angles SNA, SNB et ANB. Par contre les rsultats des deux mthodes deJacobson varient de manire significative. C'est pourquoi l'valuation de WITs nous semble tre douteuse. Dans cet ordre d'ides, nous renvoyons le lecteur au travail dePanagiotidis etWitt [5]: L'angle ANB individualis.
    Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie 12/1980; 42(1):64-70. · 0.69 Impact Factor