A clinical comparative study to assess the efficacy of a new centric registration technique with a conventional technique

Abstract

Aim: The aim and objectives of this study were to assess and compare the efficacy of a new copyrighted technique (wax ball technique, L-77997/2018) and design (denture base design for the wax ball technique, L-78006/2018) for recording centric relation (CR). Settings and Designs: In vivo – comparative study. Materials and Methods: This study was conducted on sixty consented edentulous patients. The study participants were divided into Group I and Group II. CR in Group I patients was recorded using Dawson's bimanual technique (technique 1). For participants in Group II, CR was recorded using the authors’ copyrighted technique (technique 2). Time taken and accuracy of CR records by both the techniques were evaluated. Statistical Analysis Used: Descriptive statistics such as frequency and percentage were calculated for categorical variables, mean and standard deviation were calculated for quantitative variables. Independent t -test was used to compare the time taken to record the CR between the two groups. The accuracy of both the techniques was assessed by Mann–Whitney U-test. Results: The mean time taken for technique 1 was 56.47 s, whereas for technique 2, it was 5.97 s, with an overall mean difference of 50.5 s between the two techniques. Both techniques were found to be accurate, as the CR recorded during jaw relation matched with CR during trial in all the cases in both the groups (frequency 30 (N) and cumulative percentage 100%). Conclusion: From the study, it was found that, time taken for technique 2 was statistically less compared to that of technique 1, and both the techniques were found to be equally accurate.

Comparison of wax ball centric registration technique with Gothic arch tracing: A clinical study

“…In the end, the dentist's ability and the patient's cooperation are perhaps the most critical aspects in ensuring an accurate Centric Relation record. With this background, the authors tried new technique of registering centric relation called Wax Ball technique introduced by Sushma et al (2019) [5] and compared it with standard Gothic arch tracing method. Results indicated fair agreement of wax ball recordings with Gothic arch tracing method.…”

“…The results could not be compared with other studies since it's the first study to compare this new technique with Gothic arch tracing. However, study done by Sushma et al concluded that wax ball technique required less time for centric registration compared to Dawson's bimanual technique, since it could be readily taught to the patient and demonstrated by holding the record base in one hand and demonstrating where the tongue must touch the record base when the instructions were given to do so The orientation wax balls on the record base clearly provided a guide or orientation space in the mouth for the patients to touch the tongue tip and continue pulling the condyles into the fossa with the elevator muscles [5] . Within the study's constraints, it can be concluded that the wax ball orientation technique for recording Centric relation is simple to comprehend and use and is comparable to standard Gothic arch tracing method.…”

“…Relation [5] After the establishment of orientation and vertical jaw relation, three wax orientation balls, 1 cm in diameter and 2 mm in thickness, were sealed to the upper record base of the first set of rims along the midline; one behind the incisive papilla, the second at the center of the palate, and the third immediately anterior to the posterior palatal seal region.…”

“…However, major drawback of using graphic tracing record is its complexity in recording and also tracers are contraindicated in patients with flabby ridges/highly resorbed ridges, or patients with loss of neuromuscular coordination [4] . Recently a new method of recording of centric relation was introduced by Sushma et al (2019) known as Wax ball technique which was compared with Dawson's bimanual technique [5] . Study demonstrated that wax ball technique was user friendly and cost-effective method of centric relation recording which could be suitably incorporated into conventional use.…”

Digital Determination and Recording of Edentulous Maxillomandibular Relationship Using a Jaw Movement Tracking System

“…In addition, due to the presence of movable tissues and the absence of obvious features in edentulous patients, it is difficult to obtain a direct digital recording of the maxillomandibular relationship using an intraoral scanner. Therefore, the determination and recording of the maxillomandibular relationship of CAD‐CAM complete denture systems are still primarily based on conventional clinical procedures 11–13 . Recently, there has been an increasing interest in jaw movement tracking in patients.…”