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. 2023 Jun;22(2):397-409.
doi: 10.1007/s12663-023-01862-2. Epub 2023 Feb 8.

Comparison of Occlusal Digital Analysis Using T-Scan in Orthognathic Surgery with Only Conventional Orthodontic Patients

R Manikandhan  1 , S Manikandan  2 , Keerthana Ponvel  2 , Ratna Parameswaran  3 , Sathya Shankar  4
Affiliations

Comparison of Occlusal Digital Analysis Using T-Scan in Orthognathic Surgery with Only Conventional Orthodontic Patients

R Manikandhan et al. J Maxillofac Oral Surg. 2023 Jun.

Abstract

Aim and objectives: The aims of this study were to compare the changes in occlusal parameters, TMJ status clinically in patients after the completion of orthognathic surgery, and patients undergoing only orthodontic treatment and with patients having normal occlusion, using T-Scan.

Methodology: This prospective controlled clinical trial, consisting of three groups with a sample size of twelve. Group 1 consisted of patients who underwent orthognathic surgery and orthodontic treatment. Group 2 consists of patients who underwent only orthodontic treatment (camouflage). Clinical examination of the patient (TMJ and Occlusal status) and T-Scan was performed at the time of debonding of the orthodontic brackets, 6 months and 1-year after first evaluation for group 1 and 2 patients.

Results: The collected data between groups are compared and interpreted. The statistical analysis was performed using STATA/IC version 16.1 statistical software. Intragroup comparison for the study variables occlusion time, disocclusion time and maximum bite force between different time periods (T1, T2, T3) for all the three intervention groups using repeated measures. Hypothesis testing for maximum bite force, occlusion time and disocclusion time in orthognathic group (Group 1) as compared to orthodontic group (Group 2) for three different time periods using repeated measures ANOVA and Bonferroni test showed P value < 0.05 which is statistically significant.

Conclusion: In conclusion, evaluation of occlusion using T-Scan give us an insight of the discrepancies in occlusion which is useful during pre-operative planning and especially in the post-operative follow-up period during the retention phase. Examination of TMJ in these patients at various intervals is necessary as any minor occlusal disturbances may lead to TMJ disorders.

Keywords: Bite force; Occlusion; T scan; TMJ; Temporomandibular joint disorder.

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Conflict of interest statement

Conflicts of interestThe authors declare that they have no conflicts of interest.

Figures

Fig. 1
Fig. 1
T-Scan Equipment
Fig. 2
Fig. 2
RDC TMD Questionnaire
Fig. 3
Fig. 3
T-Scan positioned for recording
Fig. 4
Fig. 4
T-Scan showing multi-bite record in centric occlusion
Fig. 5
Fig. 5
T-Scan showing bite record in right lateral movement
Fig. 6
Fig. 6
T-Scan showing bite record in protrusive movement
Fig. 7
Fig. 7
Centric Movement - Right and Left
Fig. 8
Fig. 8
Maximum Bite Force – Protrusive (Right and Left)
Fig. 9
Fig. 9
Occlusion time- Centric, Left lateral, Right lateral
See this image and copyright information in PMC

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