Evaluation of accuracy between extraoral Gothic arch tracing and various other methods assessing horizontal condylar guidance angle in completely edentulous patients: A systematic review and meta-analysis

The effect of neuromuscular training on an edentulous patient with unstable mandibular position and uncoordinated mandibular movements: a clinical report

BACKGROUND

The edentulous patients with unstable mandibular position (MP) and uncoordinated mandibular movement (MM) usually complain the poor therapeutic effect when conventional complete dentures (CCDs) are delivered. This case report aims to observe whether neuromuscular training (NT) using therapeutic complete dentures (TCDs) can improve the MP and MM, thereby promoting the effect of the definitive dentures.

CASE PRESENTATION

NT was conducted using TCDs for an edentulous patient with unstable MP and uncoordinated MM. After a period of masticatory exercises, the patient's MP and MM improved. Finally, the definitive dentures were delivered, achieving satisfactory results.

CONCLUSION

NT with TCDs can improve unstable MP and uncoordinated MM, leading to successful rehabilitation in edentulous patient.

A comparative assessment of condylar inclination in completely edentulous patients using cone beam computed tomography and Arcus digma II

STATEMENT OF PROBLEM

Condylar inclination affects denture fabrication and placement, especially when bilateral balanced occlusion is provided. However, comparisons between radiographic techniques and clinical procedures are lacking.

PURPOSE

The purpose of this clinical study was to investigate the effects of cone beam computed tomography (CBCT) and Arcus digma II on horizontal condylar inclination and bilateral balanced occlusion.

MATERIAL AND METHODS

Twelve completely edentulous individuals were provided with complete dentures with teeth in bilateral balanced occlusion. The horizontal condylar angle was measured using CBCT and the Arcus digma II with a 6-mm mandibular protrusion. The CBCT had a real-time 3D image, and the Arcus digma II method recorded mandibular movement using electronic sensors. To evaluate the clinical performance, the horizontal condylar angle was measured using the 2 methods and applied to the semi-adjustable articulator to evaluate the balanced occlusion. The Shapiro-Wilk test was used to assess normality, and a paired t test was used to assess the normally distributed data (α=.05).

RESULTS

The horizontal condylar guidance angle values for both sides of Arcus digma II were significantly higher than from CBCT (P<.05). No difference was found in the clinical performance of balanced occlusion of complete dentures in the 2 methods.

CONCLUSIONS

The Arcus digma II method yielded higher horizontal condylar angle measurements than from CBCT. However, no significant difference was found between Arcus digma II and CBCT in terms of the effect on balanced occlusion. Arcus digma II appears to be a reliable technique for measuring the horizontal condylar angle, similar to CBCT, and can be used as an alternative method.

Evaluation of marginal bone level, technical and biological complications between screw-retained and cement-retained all-ceramic implant-supported crowns on zirconia abutment: A systematic review and meta-analysis

PURPOSE

The purpose of this study was to evaluate the difference in marginal bone level, technical and biological complications between screw-retained and cemented all-ceramic implant-supported crowns fabricated on zirconia abutment at different follow-up periods.

MATERIALS AND METHODS

Independent search was conducted in Cochrane Library, EBSCO, and PubMed/PubMed Central/MEDLINE databases and the Google Scholar search engine for prospective studies and randomized controlled trials published between January 2014 and June 2023 evaluating the marginal bone level, technical and biological complications between screw-retained and cemented all-ceramic implant-supported crowns fabricated on zirconia abutment. Meta-analysis was conducted to assess the quantitative data on the marginal bone level and biological complications.

RESULTS

A total of eight studies were included for qualitative synthesis and six studies for quantitative synthesis. For marginal bone level, no statistically significant difference was observed (P = 0.83 and P = 0.69, respectively) during the follow-up period of 3 years and 5 years. For probing depth, the cemented group showed more amount of probing depth than the screw-retained group at a follow-up period of 3 years (P < 0.05) whereas no statistically significant difference was observed at a follow-up period of 5 years (P = 0.73). For bleeding on probing, the cemented group showed more probing depth than the screw-retained group at a follow-up period of 5 years (P = 0.10).

CONCLUSION

The evidence suggests that the screw-retained group showed no statistically significant difference in marginal bone level, comparatively fewer biological complications, and relatively higher technical complications than the cemented group at different follow-up periods.

A systematic review and meta-analysis of accuracy between protrusive interocclusal record and horizontal condylar guidance angle recording methods in dentulous patients

AIM

This systematic review and meta-analysis aimed to evaluate the accuracy of different methods used for measuring horizontal condylar guidance (HCG) angle in comparison with protrusive interocclusal record (IOR) for dentulous patients.

SETTINGS AND DESIGN

The design involves systematic review and meta-analysis following the Preferred Reporting Items for Systematic Review and Meta-analysis guidelines.

MATERIALS AND METHODS

An electronic search was carried out by two reviewers in the Google Scholar search engine and the EBSCO host, Cochrane Library, and PubMed/MEDLINE databases for quasi-experimental studies, in vivo studies, and cross-sectional studies published from January 2005 to February 2023 determining the HCG angle in dentulous patients.

STATISTICAL ANALYSIS USED

Meta-analysis was performed to evaluate the quantitative data.

RESULTS

A total of 577 articles were identified, 29 analytical cross-sectional studies that fulfilled the eligibility criteria were included for qualitative synthesis and 26 studies were included for meta-analysis. A statistically significant difference was observed for the right and left HCG angles obtained by the panoramic radiograph method and cone-beam computed tomography (CBCT) method and for the right side HCG angle obtained by cephalogram method showing higher values than the protrusive IOR method. No statistically significant difference was observed for the left side HCG angle obtained by the cephalogram method and both the right and left side HCG angles obtained by the intraoral tracer method.

CONCLUSIONS

The panoramic radiograph, cephalogram, and CBCT obtained higher HCG angles in dentulous patients than the protrusive IOR method.