Effect of storage environment on the bond strength of reattachment of crown fragments to fractured teeth

Different Approaches to the Treatment of Anterior Tooth Fractures: Three Clinical Cases and Behavior Report

Fractures of the anterior teeth are a common form of dental trauma. This article includes three case reports of uncomplicated fractures of upper anterior teeth in which collaborators had different treatment protocols. The choice of the treatment method is based on the direction of the specific clinical case and the clinical findings. Of great importance to the treatment approach are the measures taken by the patient to preserve the fractured fragment, the age of the fracture, and the time available to patients and clinicians. When the fractured fragment is available and is well-preserved, the best approach is to fix it to the crown of the tooth. This protocol is extremely fast and inexpensive, with minimal potential for problems in esthetics and function. In the absence of the fractured fragment, the treatment approaches are different, as described in cases 2 and 3. If the patient or the clinician is unable to make a repeat visit, the restoration is carried out using a freehand technique. Protocols involving fracture repair using composite materials are more labor-intensive. Esthetic complications are often observed, which may be due to wrong determined shade, loss of luster, and change over the years in the color of the restoration, as well as fracture of the restoration. With advances in dentistry, these disadvantages have been minimized.

Effect of temperature on rehydration and fracture resistance of reattached tooth fragments after crown fracture: An in vitro study

BACKGROUND

Uncomplicated crown fractures of maxillary anterior teeth are common dental injuries, and the bonding of fractured fragments is recommended for management. Rehydration of fragments improves bonding and fracture resistance. Therefore, the aim of this study was to compare the fracture resistance of the reattached tooth fragment of the incisor crown after rehydration using either a steamer or a humidifier.

MATERIALS AND METHODS

Bovine teeth were used as a model. Fractured fragments were divided into three groups: Group I (no rehydration), Group II (rehydration by humidifier), and Group III (rehydration by steamer). Fragments were reattached using a standard bonding protocol. Fracture resistance was tested using a universal testing machine. Statistical analysis was performed using analysis of variance and Chi-square tests.

RESULTS

The force required to fracture the reattached fragments was significantly higher in Group II (humidifier) compared to Group I (no rehydration) (P = 0.005). Group III (steamer) had a force value similar to Group I, indicating no significant improvement in fracture resistance with steamer rehydration. The temperature inside the steam-based chamber reached an average of 95.7°C with 95% humidity, whereas the conventional humidification chamber had an average temperature of 39.2°C and 84% humidity.

CONCLUSION

Within the limitations of the present study, the rehydration protocol using a steam-based chamber was found to have a significantly lower force required to fracture the reattached fragments as compared to humidifier-based chamber. This was not significantly different from the fragments which were reattached without rehydration.

Comparative Evaluation of the Effect of Various Storage Media on the Fracture Resistance of the Reattached Tooth Fragment: An Observational Study

Background

Traumatic injuries are the most disruptive and distressing emergencies and pose a challenge for dental professionals because many different treatment protocols are currently available. They also affect the social and psychological well-being of children. A multidisciplinary approach is involved in the management of traumatic dental injuries to maintain function and esthetics. The aim of this study was to evaluate the fracture resistance of a reattached tooth fragment kept in four storage media, namely Hank's balanced salt solution (HBSS), Tooth Mousse, ginger honey, and probiotic yogurt, for 1, 6, and 24 hours.

Materials and methods

The study consisted of 84 intact maxillary central incisors. All the teeth were stored in distilled water until used and were embedded in acrylic molds, 1 mm below the cervical end. The teeth were then sectioned to simulate an uncomplicated crown fracture (Ellis class II fracture), and all the teeth were randomly divided into four groups of 21 each. The teeth were then reattached using Tetric N Universal bonding agent and Tetric N Flow flowable composite. Fracture resistance was assessed using a universal testing machine. Statistical analysis was done using a one-way analysis of variance (ANOVA) test and a post hoc Tukey test.

Results

The results showed that fracture resistance was highest in the Tooth Mousse group at 6 and 24 hours. Ginger honey exhibited the highest fracture resistance at 1 hour, whereas the probiotic yogurt group showed the lowest values.

Conclusion

It was concluded that Tooth Mousse was the best storage medium for storing tooth fragments. Ginger honey can also be used as an alternative storage medium as it is easily available and inexpensive.

How to cite this article

Naik S, Murry JN, Sharma S, et al. Comparative Evaluation of the Effect of Various Storage Media on the Fracture Resistance of the Reattached Tooth Fragment: An Observational Study. Int J Clin Pediatr Dent 2024;17(6):665-672.

Reattachment of Fractured Tooth Fragment by Multidisciplinary Treatment Approach

Dental anterior fractures are common injuries, especially in those who practice extreme sports. This report describes a 25-year-old Bolivian patient who attended our private dental clinic in La Paz, Bolivia after experiencing an accident during downhill mountain biking. An intraoral examination revealed a fracture line on the buccal side in the middle third of the coronal portion of the right central maxillary incisor which extended towards the proximal and lingual sides. Multidisciplinary treatment, including crown lengthening, osteotomy, root canal treatment, fiberglass post insertion, and reattachment of the fracture segment was performed. A follow-up examination at 10 months later revealed that the tooth was completely reestablished both functionally and esthetically and that there was no periapical pathosis or discomfort. This outcome suggests that if a patient seeks a dental consultation soon after a complex crown-root fracture has occurred, and if the broken tooth segment is available, then reattachment offers an economical and simple treatment option which will allow immediate restoration of functionality and esthetic standards. Continued follow-up should form part of such a treatment plan to allow long-term pulp vitality and periodontal health status to be monitored.

Conservative Management of Complicated Crown-Root Fracture: An Immediate Esthetic Rehabilitation

Among the various types of dental trauma, crown-root fractures are one of the most challenging to treat and require a multidisciplinary approach. This paper reports a case of a complicated crown-root fracture of maxillary left central incisor with esthetic, functional complications. An 18-year-old male patient presented to the department immediately after suffering trauma with a complicated crown-root fracture on tooth 21. As per the treatment, the patient had undergone endodontic therapy followed by flap reflection. Post flap reflection, a glass fiber post was luted, and the fractured fragment was reattached. By this approach, in the same appointment, the cervical margin can be exposed with appropriate isolation followed by a reattachment procedure. Reattaching the fragment is a viable option as it can be done immediately, provides better esthetics, restores function, and is less complicated than the conventional approach. A good prognosis is dependent on patient cooperation with the understanding of the treatment limitations. The article discusses a successful case of complicated crown-root fracture treated with the reattachment of a tooth fragment.

Eighteen months of clinical and radiographic evaluation revealed that the clinical protocol was effective, as the tooth was functional, asymptomatic, and esthetic.

Effect of preconditioning the fractured coronal fragments with remineralizing agents on fracture resistance of re-attached teeth

BACKGROUND

Fragment re-attachment has been considered as one of the treatment modalities for the management of fractured anterior teeth. Hydration of fractured fragments aids in inhibiting the loss of ions and maintains vitality and esthetics.

AIM

The study aimed to evaluate the effect of preconditioning the fractured fragments with remineralizing agents on fracture resistance of re-attached teeth.

SETTINGS AND DESIGN

This was an in vitro study.

MATERIALS AND METHODS

Sixty freshly extracted noncarious human permanent maxillary central and lateral incisors were randomly allocated into three Groups of 20 each: Group 1: 2% sodium fluoride (2%NaF), Group 2: casein phosphopeptide-amorphous calcium phosphate (CPP-ACP), and Group 3: self-assembling peptide P_11-4 (SAP). These were further divided into two subgroups of 10 teeth each, based on contact time with remineralizing agents, i.e., 30 min and 2 h. Fractured fragments were treated with remineralizing agents for a specified contact time and then re-attached with flowable composite resin. Force required to fracture the re-attached tooth was recorded in Newtons using universal testing machine.

STATISTICAL ANALYSIS

Unpaired t-test, one-way analysis of variance test, and post hoc Tukey test were used for the statistical analysis.

RESULTS

A higher fracture resistance was noticed in fragments treated with 2% NaF (30 min- 215.6 N, 2 h- 188.5 N) compared to CPP-ACP (30 min- 141.3 N, 2 h- 111.1 N) and SAP (30 min- 134.8 N, 2 h- 149.5 N). At 30 min interval, it was found to be more in 2% NaF and CPP-ACP groups compared to 2 h. However, it increased with time in the SAP group. A statistically significant difference was found between the groups at both time intervals (P = 0.007 and 0.017).

CONCLUSION

Preconditioning of fractured coronal fragments with 2% NaF showed higher fracture resistance compared to CPP-ACP and self-assembling peptide P_11-4. Samples treated with SAP P_11-4 exhibited good fracture resistance at 2 h contact time.

Influence of different tooth preparation and bonding techniques on the fracture resistance of tooth fragment reattachment

Purpose

comparing the influence of different tooth preparation and bonding techniques on the fracture resistance of tooth fragment reattachment.

Materials and method

Ninety bovine central incisors were selected. Fifteen teeth act as a control (Group A). Experimental specimens were sectioned at the mesial-incisal proximal edge 3 mm from the incisal edge in a labio-lingual direction at 25degree inclination apically. Experimental specimens were then divided into five groups according to the tooth reattachment techniques utilized; Group B: no tooth preparation + Cured bond + Flowable composite; Group C: no tooth preparation + Uncured bond + Flowable composite; Group D: Bevel + bond + Flowable composite; Group E: Over-contouring + bond + Nanohybrid composite; Group F: Over-contouring + bond + Flowable composite. Specimens were subjected to thermocycling between 5 °C and 55 °C for 500 cycles with 30 sec. dwell time. Fracture strength was evaluated using universal testing machine. Data was analyzed using One-way ANOVA.

Results

There was a statistically significant difference between Group A and all the experimental groups, p < .001. Group E showed the highest statistically significant fracture resistance mean value compared to other experimental groups, while the lowest mean value was found in Group B.

Conclusion

Though, none of the tested techniques resulted in fracture resistance similar to that of intact teeth, over-contouring technique with nanohybrid composite application showed better performances compared to the other techniques tested in the current study. Bonding plus flowable resin composite application with no additional tooth preparation and placement of a bevel are not suggested due to the low fracture strength achieved.

Fracture Resistance of Reattached Hydrated Fragment of Fractured Incisors

Background and objectives

Fragment reattachment procedure provides conservative treatment option when an intact fractured fragment is available. Rewetting of fractured fragment before reattaching has shown better bond strength of attached fragment. Therefore, fracture resistance of reattached fractured fragment with hydration and without hydration was evaluated and compared.

Materials and methods

Ellis class II fracture was induced in selected and coded 60 extracted maxillary central incisors using a custom-made-wise and assigned into group I and group II (without hydration and with hydration) and both the groups were further divided into two groups (1 week and 3 months). In group I, fractured fragments were reattached after bench-drying for 24 hours. In group II, fractured fragments were reattached after hydrating for 1 hour following bench-drying for 24 hours. Composite (Filtek Z350 XT, Universal Restorative, 3M ESPE) was used to reattach the fractured fragments. Reattached fractured fragments were stored in artificial saliva for 1 week and 3 months and subjected to fracture resistance test using Universal Testing Machine. The data obtained were tabulated and statistically analyzed.

Results

Fracture resistance in hydration samples was higher than without hydration at the end of 1 week and 3 months statistically. Fracture resistance of fractured fragment at the end of 3 months was higher in both with hydration and without hydration but was not significant with hydration.

Conclusion

Hydration of fractured fragment before reattachment procedure has shown better fracture resistance and improved further after storing in artificial saliva for 3 months.

How to cite this article

Suresh M, Mallikarjun SB, Babu G, et al. Fracture Resistance of Reattached Hydrated Fragment of Fractured Incisors. Int J Clin Pediatr Dent 2020;13(5):476-480.

Resistance to fracture of extracted teeth used for pre-clinical endodontic procedures: Influence of storage conditions

OBJECTIVES

The purpose of this in vitro study was to determine whether different storage conditions used during endodontic procedures affect the fracture resistance of extracted teeth used for pre-clinical dental education.

METHODS

Freshly extracted mandibular incisors and canines were sterilised in an autoclave for 40 minutes at 24°F under a pressure of 20 psi and then stored in distilled water at 4°C until use. Specimens were randomly assigned to two groups based on the storage method used whilst undergoing endodontic procedures. Between endodontic sessions, teeth in the Wet Group (n = 16 incisors; n = 4 canines) were stored in distilled water and teeth in the Dry Group (n = 16 incisors; n = 4 canines) were stored in a dry container. All specimens were kept at room temperature and away from sunlight. Endodontic treatments were performed in 3 sessions over a 3-week period. The specimens were then brought to fracture under compressive forces along the long axis of the tooth in an Instron universal testing machine. The data were analysed using t tests (α = 0.05).

RESULTS

None of the teeth fractured during endodontic procedures. However, the compressive load required to fracture teeth stored under wet conditions was significantly higher than the load needed for teeth stored dry (P < .05).

CONCLUSIONS

Fracture resistance is affected by storage conditions; teeth stored in water have a higher resistance to fracture than teeth that are stored dry. Fracture resistance was, however, not reduced enough to lead to tooth fracture during pre-clinical endodontic procedures.

Reattachment of a Dehydrated Tooth Fragment Using Retentive Holes

Coronal fracture of the anterior teeth is mainly common among children and adolescents. Though diverse treatment modalities are available, tooth fragment reattachment is generally considered a viable treatment option due to simplicity, natural aesthetics, and functional success. This paper presents a case of a 10.5-year-old female patient with a fractured maxillary central incisor with a dehydrated fragment. The dehydrated fragmented part was reattached with the help of retentive holes using an adhesive bonding agent and a resin composite cement. Follow-up at 15 months showed that the tooth was vital and functional with natural aesthetics.

Influence of Storage Media and Duration of Fragment in the Media on the Bond Strength of the Reattached Tooth Fragment

Introduction

Fracture of anterior teeth is the most frequent type of injury in the permanent dentition. Composite materials have made possible the use of adhesive materials and techniques, but storage of fragment in the media can enhance the bond strength. The purpose was to evaluate the influence of storage media and duration of the fragment in the media on the bond strength of the reattached fragment of teeth.

Materials and methods

A total of 104 permanent maxillary central incisors were included. Samples were divided into four groups of 26 teeth each, further divided into eight groups of 13 teeth each and sectioned 3 mm apical to the incisal edge and stored in four storage media—tap water, artificial saliva, sodium fluoride, and Tooth Mousse at 12 and 24 hours. The bond strength was measured by universal strength testing machine.

Results

Tooth Mousse showed statistically significant difference (p-value 0.001) compared with sodium fluoride, artificial saliva, and tap water when stored in both 12 and 24 hours’ duration.

Conclusion

Tooth Mousse was a better storage media when compared with sodium fluoride, artificial saliva, and tap water.

Clinical significance

Tooth Mousse can be considered as a best storage media for fragment reattachment.

How to cite this article: Jalannavar P, Tavargeri A. Influence of Storage Media and Duration of Fragment in the Media on the Bond Strength of the Reattached Tooth Fragment. Int J Clin Pediatr Dent 2018;11(2):83-88.

Effect of storage media on fracture resistance of reattached tooth fragments using G-aenial Universal Flo

Background:

Over a period of the past few years’ episodes of dental trauma more commonly coronal fractures of anterior teeth are being increasingly reported in children. Fragment reattachment can be considered as a valid treatment option in such situations. However, ideal medium for storage of fragments before reattachment needs to be explored.

Aim:

To compare the fracture resistance of incisor tooth fragments stored in four storage media: Dry air, milk, coconut water, or egg white before reattaching them with G-aenial Universal Flo.

Materials and Methods:

Forty-eight freshly extracted maxillary incisors were divided into four groups. Teeth were then sectioned, and fragments were stored in dry air (Group I), milk (Group II), coconut water (Group III), and egg white (Group IV). The fragments were reattached using simple reattachment technique and tested on the Universal Testing Machine. Statistical analysis was performed using one-way analysis of variance and post hoc Tukey's test.

Results:

There was statistically significant difference (P < 0.05) in fracture resistance values between the groups. The highest fracture resistance value was demonstrated by Group II, whereas least fracture resistance values were observed in Group IV.

Conclusion:

Along with milk, coconut water being tested for the first time can be considered a viable alternative.

Preservation of coronal tooth fragments prior to reattachment

BACKGROUND

Reattachment of the tooth fragment is a well-accepted treatment option in dealing with crown fractures. Hydration of the fragment is an important aspect in this treatment. The present study evaluated the effect of storing fragments in different storage media prior to reattachment.

METHODS

Sixty bovine incisors were randomly divided into five groups. The teeth were fractured and the fragments were dried for 48 hours and then immersed in one of the four experimental media (distilled water, milk, egg white, or 50% dextrose solution) for 2 hours. Tooth fragments in the control group were kept dry. The apical segments of the fractured teeth were stored in physiological saline. Fragments were reattached and force was applied on the labial side of the teeth at a 1 mm/min rate until failure.

RESULTS

One-way ANOVA indicated that the storage medium affects bond strength (p = 0.002). Multiple comparison tests showed that the teeth preserved in the 50% dextrose solution and the egg white exhibited significantly higher bond strengths compared to the control group (p < 0.05).

CONCLUSIONS

Preservation of the fractured tooth fragment in egg white or hypertonic solutions results in a higher strength of the bond between the restoration and the tooth as compared to storage in water or dried conditions.