Long term complications of previously successful regenerative endodontic procedures after orthodontic movement. Report of three different complications after 4, 8 and 11 years respectively

Ergonomic interventions and endodontic treatment outcomes: An analysis of dentist working posture and error rates

Purpose

Dentists spend a long time the day in the position. It is possible that this leads to discomfort that may translate to procedural errors during treatment, such as root canal treatment. This study aims to investigate the relationship of working posture and procedural errors in endodontic manipulations.

Materials and Methods

32 dentists (17 men, 53.13%, and 15 women, 46.88%) from the University Dental Polyclinic of Uzhhorod National University (Uzhhorod, Ukraine) were included in the study. REBA, RULA, frequency of procedural errors were analysed using regression.

Results

This study revealed a surprising trend where a decrease in errors during endodontic treatment was associated with higher RULA and REBA scores, contrary to the expected increase in errors with higher ergonomic stress. Additionally, the research highlighted the significant impact of a dentist's handedness and tooth position in the dental arch on treatment ergonomics and efficiency, as observed and analyzed through ergonomic assessments and statistical methods.

Conclusions

The study conclusively demonstrated that optimal positioning and alignment during dental procedures significantly contribute to a reduction in procedural errors, underscoring the importance of ergonomics in clinical dentistry.

Long-Term Clinical and Radiographic Observation of Previously Regenerated Treated Incisors Subjected to Orthodontic Movement. A Case Series

INTRODUCTION

With an increasing number of anterior traumatized teeth treated with regenerative endodontic procedures (REPs) nowadays, orthodontic movement of such teeth is expected to become a common scenario in everyday clinical practice. However, little is known about the clinical implications and the response capacity of regenerated tissues to orthodontic forces.

METHODS

The aim of this clinical article was to report on 4 cases of REP-treated immature anterior permanent teeth subjected to orthodontic forces, and to describe the long-term response of the regenerated apical and intracanal tissues.

RESULTS

Signs of orthodontic-induced external root resorption were observed in 2 of the 4 presented cases without, however, the presence of any associated adverse events. No other complications were observed, either clinically or radiographically, throughout the observation period. In the long-term, all 4 cases responded favorably to orthodontic forces, maintaining healthy apical tissues and structural integrity of both intracanal as well as apically regenerated tissues.

CONCLUSIONS

The orthodontic movement of REP-treated teeth seems feasible, nevertheless, special care should be implemented. Lightly acting orthodontic forces, short duration of active movement, and close monitoring of the patient seem to be prerequisites to limit complications to a minimum and achieve a favorable healing of REP-treated teeth in the long-term following orthodontic treatment completion.

Knowledge of Dental Trauma and Orthodontic Management of Traumatized Teeth by a Group of Lithuanian Orthodontists

Background and Objectives. There is a deficiency of research on orthodontic movements and management strategies for traumatized teeth to avoid further treatment complications. The aim of the study was to evaluate the knowledge of Lithuanian orthodontists about dental trauma and the orthodontic management of traumatized teeth. Materials and Methods. Lithuanian orthodontists and orthodontic residents were introduced to the purpose, objectives and questionnaire of the study. The questionnaire was developed based on demographics, the participants' personal experience, specific questions about dental traumas and orthodontic treatment tactics for patients with a history of dental trauma. Results. A total of 54 participants (42 orthodontists and 12 orthodontic residents) completed the survey. The overall response rate was 42.9%. The results of the survey revealed that the largest share of the study participants-61%-stated that they had treated traumatized teeth just a few times during the whole practice. Briefly, 53.7% of respondents inquired about the dental trauma history only if they saw signs of complications. The results of the survey revealed that the frequency of correct answers to questions about dental trauma was 63.7%, and that about the orthodontic treatment of traumatized teeth was 54.9%. It is worth noting that one-third of physicians pointed out the lack of information about the orthodontic management of traumatized teeth. Conclusion. The knowledge of Lithuanian orthodontists and orthodontic residents about dental injuries and the orthodontic treatment of traumatized teeth is insufficient. Further educational training is recommended.

Endodontic-orthodontic interactions: a review and treatment recommendations

The literature is replete with articles describing the many and varied interactions between endodontic treatment and orthodontic tooth movement (OTM), often reporting conflicting views and findings, which creates confusion for clinicians. Original research and review articles have described aspects such as apical root resorption and potential pulpal complications of teeth related to OTM. Some interactions are of relatively minor clinical significance, whilst others may have adverse consequences. A history of dental trauma before or during OTM further complicates the interactions. This review re-assesses the historical literature on endodontic-orthodontic interactions in light of more recent research and presents guidelines for managing clinical situations involving both disciplines. © 2023 Australian Dental Association.

Root Surface Changes in Endodontically Treated Teeth Following Orthodontic Movement

INTRODUCTION

Orthodontically induced external root resorption (OIERR) has been labeled an unavoidable consequence of orthodontic tooth movement (OTM). The objective of this study was to investigate the change in surface area (mm²) and volume (mm³) of endodontically treated teeth (ETT) compared to contralateral teeth with a vital pulp (VPT) following OTM.

METHODS

Seventy-six teeth were included in this retrospective analysis: ETT (n=38) and VPT (n=38). All teeth were evaluated using CBCT imaging at two time periods: before OTM (T1) and after OTM (T2). Study teeth were segmented to include all areas contained within the lamina dura and then were converted into a mesh model for data calculation. The surface area (mm²) and volume (mm³) of each tooth was calculated at T1 and T2 based on the number of cubic voxels present within the mesh model. Statistical analysis was performed using a linear mixed-effects model.

RESULTS

The average change in surface area following OTM in ETT was 13.01 mm², and 19.95 mm² in VPT (p<0.05). The average percent change in surface area following OTM in ETT was 2.09%, and 3.38% in VPT (p<0.05). The average change in volume following OTM in ETT was 22.48 mm³, and 32.44 mm³ in VPT (p<0.05). The average percent change in volume following OTM in ETT was 2.62%, and 4.10% in VPT (p<0.05).

CONCLUSIONS

The results from this study suggest that ETT are less susceptible to root resorption following OTM than their vital counterparts.