A cephalometric study to establish the relationship of the occlusal plane to the three different ala-tragal lines and the Frankfort horizontal plane in different head forms

ABSTRACT Proper management of the occlusal plane is an essential consideration when multiple long span posterior restorations are designed. When restorations are added to an existing tooth arrangement characterized by rotated, tipped or extruded teeth, excursive interferences may be incorporated. The curve of Spee which exists in natural dentition, allows harmony to exist between the anterior teeth and the condylar guidance. Broadrick flag or occlusal plane analyzer is used to assist in the reproduction of tooth morphology that is commensurate with the curve of Spee when posterior restorations are designed; its use prevents the introduction of protrusive interferences. The current study determines the relationship of the center of anteroposterior curve of occlusion in the cranium and its relationship to other cephalometric landmarks and also evaluates the relationship of anteroposterior curve of occlusion to the condyle. How to cite this article Kumar TK, Thomas V, Nilawar S, Balamurugan R, Marwaha BS, Vinod V. A Cephalometric Study to Determine the Center of Anteroposterior Curve of Occlusion in the Cranium. J Contemp Dent Pract 2013;14(5):836-841.

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Influence of magnification and superimposition of structures on cephalometric diagnosis

Dental Press Journal of Orthodontics ◽

10.1590/2176-9451.20.2.029-034.oar ◽

2015 ◽

Vol 20 (2) ◽

pp. 29-34 ◽

Cited By ~ 4

Author(s):

Leonardo Koerich de Paula ◽

Priscilla de Almeida Solon-de-Mello ◽

Claudia Trindade Mattos ◽

Antônio Carlos de Oliveira Ruellas ◽

Eduardo Franzotti Sant'Anna

Keyword(s):

Horizontal Plane ◽

Intraclass Correlation ◽

Individual Variability ◽

Occlusal Plane ◽

Maxillary Incisor ◽

Plane Angle ◽

R Software ◽

Mandibular Incisor ◽

Full Face ◽

Frankfort Horizontal Plane

OBJECTIVE: The purpose of this study was to assess the influence of magnification and superimposition of structures on CBCT-generated lateral cephalometric radiographs (LCR) using different segments of the cranium. METHODS: CBCT scans of 10 patients were selected. Four LCR were generated using Dolphin Imaging(r) software: full-face, right side, left side and center of the head. A total of 40 images were imported into Radiocef Studio 2(r), and the angles of the most common cephalometric analyses were traced by the same observer twice and within a 10-day interval. Statistical analyses included intraexaminer agreement and comparison between methods by means of intraclass correlation coefficient (ICC) and Bland-Altman agreement tests. RESULTS: Intraexaminer agreement of the angles assessed by ICC was excellent (> 0.90) for 83% of measurements, good (between 0.75 and 0.90) for 15%, and moderate (between 0.50 and 0.75) for 2% of measurements. The comparison between methods by ICC was excellent for 68% of measurements, good for 26%, and moderate for 6%. Variables presenting wider confidence intervals (> 6o) in the Bland-Altman tests, in intraexaminer assessment, were: mandibular incisor angle, maxillary incisor angle, and occlusal plane angle. And in comparison methods the variables with wider confidence interval were: mandibular incisor, maxillary incisor, GoGn, occlusal plane angle, Frankfort horizontal plane (FHP), and CoA. CONCLUSION: Superimposition of structures seemed to influence the results more than magnification, and neither one of them significantly influenced the measurements. Considerable individual variability may occur, especially for mandibular and maxillary incisors, FHP and occlusal plane.

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Length of anterior cranial base and Frankfort horizontal plane: A lateral cephalometric study in 11–16-year-old children

Journal of Physics Conference Series ◽

10.1088/1742-6596/1073/2/022014 ◽

2018 ◽

Vol 1073 ◽

pp. 022014

Author(s):

S B Budiardjo ◽

A F Karim ◽

S Indriati ◽

N A Wahono ◽

M Suharsini ◽

...

Keyword(s):

Horizontal Plane ◽

Cranial Base ◽

Anterior Cranial Base ◽

Cephalometric Study ◽

Frankfort Horizontal Plane

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Comparison of Maxillary Occlusal Plane with Various Craniofacial Reference Lines in Nepalese and Indian Young Adults

Orthodontic Journal of Nepal ◽

10.3126/ojn.v1i1.9360 ◽

2011 ◽

Vol 1 (1) ◽

pp. 16-19

Author(s):

Binod Acharya

Keyword(s):

Horizontal Plane ◽

Vital Role ◽

Occlusal Plane ◽

Age Group ◽

Complete Dentures ◽

Facial Growth ◽

Degree Of Separation ◽

Angular Measurements ◽

Natural Teeth ◽

Frankfort Horizontal Plane

Orientation of occlusal plane for complete dentures play a vital role as it affects all the basic requirements of complete dentures. Depending on soft tissue landmarks for orienting occlusal plane seems to be unreliable. Cephalometrics were introduced in Prosthodontics to orient the occlusal plane in the same position as it was with the lost natural teeth. In the present study, 60 lateral cephalometric radiographs of a group of male and female dentulous subjects of Indian and Nepali origin (30 subjects in each group) were obtained and tracings were made. All the subjects selected were in the age group of 20-30 years in whom the facial growth was completed. Angular measurements were made between FH (Frankfort Horizontal plane)- CP (Camper's Plane), FH-OP (Occlusal Plane) and CP-OP and subjected to statistical analysis to determine the degree of separation between these planes in Indian and Nepalese ethnic groups. The absolute parallelism between the natural occlusal plane and Camper's plane were not proven in both Indian and Nepalese subjects involved in this study. This significantly reduces the reference values of these planes in Prosthodontics.

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