Background and Aim: The success of complete denture depends on correct determination of occlusal plane in edentulous patients. Various landmarks maybe useful such as Frankfurt horizontal plane, campers line etc. The present study was conducted to determine the usefulness of different anatomic reference planes in determination of occlusal plane in dentulous and edentulous subjects with Angle’s class I and class II maxilla- mandibular relationship. Materials and Methods: This study included 100 subjects divided into 4 groups. Each group had 25 subjects. Group I had young dentulous subjects with angle class I relation, group I had dentulous subjects with angle class II relation. Group III & group IV had completely edentulous in Angle’s class I and class II relationship respectively. All were subjected to lateral cephalogram and tracings were performed. Results were analyzed using T- test wherein P value less than 0.05 was set as cutoff level of significant. Results: There was no significant difference of angle between Occlusal plane and Frankfort Horizontal plane and Camper’s plane when Group I and Group III, and Group II and Group IV subjects were compared (P value >0.05).  Conclusion: The Frankfort Horizontal plane and Camper’s plane may possibly be used as a consistent tool to re-establish the lost occlusal plane in edentulous subjects in both Angle’s class I and class II jaw relationships. Clinical significance: The correct determination of occlusal plane is a tedious task wherein clinicians frequently come across positional instability of various soft tissue landmarks in different patients. The study result indicates the intricate application and usage of lateral cephalograms in precise relocation of lost occlusal plane in two different jaw relationships.
Key Words: Ala, Frankfort Horizontal plane, Tragus, Cephalometrics                                                          

Received: 20 January 2018                                 Revised: 22 February 2018                        Accepted: 26 February 2018
Corresponding Author: Davinderjit Kaur Shergill, Senior Lecturer, Department of Prosthodontics, Maharaja Ganga Singh Dental College, Sriganganagar (Rajasthan), India

This article may be cited as: Shergill DK. Intricate Assessments of the Consistency of Different Reference Planes in Reorienting the Occlusal Plane in Class I and Class II Jaw Relationships; A Cephalometric Based in Vivo Study.  Int J Res Health Allied Sci 2018; 4(2):99-103.