ABSTRACT Extrusive luxation is a traumatic dental injury (TDI) due to the action of forces, especially in the oblique angle. Partial displacement of the tooth is one of its characteristics. Repositioning is the treatment of choice for this type of trauma. The mechanism of bone augmentation and splint in managing the post extrusive luxation teeth reposition was explored and reported. An 18-year-old male with a history of traffic accident which caused extrusive luxation of 11 and 21 with no alveolar bone fracture. The patient was managed by repositioning the teeth and applicating arch-bar on anterior maxillary teeth. After eight weeks of evaluation, periapical radiograph showed the distal bone of 21 had radiolucent appearance followed by Class 1 mobility. The arch-bar was removed, and the periosteal flap was made on the buccal side of 21 and the distal part was curetted then irrigated with 0.9% sodium chloride, then supplemented with bone graft material and pericardium membrane. Lastly, the flap was returned, the tooth was then stabilised using self-curing adhesive resin cement (Super-Bond). The tooth was kept under observation for two months. It was observed that the tooth was asymptomatic and still in function with no radiographic signs of pathosis. These results suggested that tooth reposition might be an alternative to prosthetic or implant dentistry. However, further human research is recommended with long standing follow-up periods and comparative studies to be carried out to identify whether dental implant replacement or reposition is the cost-effective treatment for extruded tooth.
Tooth Avulsion

PURPOSE: The aim of this study is to evaluate the flexural strength of flexible resins and the flexibility of different resin splint (RS) systems in comparison with resin wire splint (RWS) system. MATERIALS AND METHODS: Three different resin materials (G-aenial flo, GA, GC; Superbond, SB, Sun medical; G-fix, GF, GC) were tested flexural strength test in accordance with ISO-4049:2000. For the flexibility test of splint systems, a artificial model with resin teeth was used to evaluate three types of resin splint systems (GA, SB, and GF) and one resin wire splint system. The left central incisor was simulated ‘injured teeth’ with third degree mobility. Three consecutively repeated measurements of periotest value were taken in horizontal direction, before and after splinting to access tooth mobility. The splinting effect was calculated through the periotest value. Differences were evaluated through One-way Anova and Tukey HDS post-hoc tests for pair-wise comparison (α= .05). RESULTS: Although GA group showed significant higher flexural strength than SB and GF groups, all of three different resin splint systems produced a significantly higher and rigid splinting effect compared with 016" resin-wire splint system (P < .05). CONCLUSION: Within the limits of an in vitro study, it can be stated that resin splint systems are too rigid and may not be acceptable to treat tooth avulsion.
In Vitro Techniques ; Incisor ; Pliability* ; Solar System ; Splints* ; Tooth Avulsion ; Tooth Mobility ; Tooth*

Stabilization with splint is an important surgical technology in traumatic dental injuries of permanent tooth. In order to standardize the clinical application of the technique and to improve the therapeutic effects of traumatic injured teeth, the Society of Stomatological Emergency, Chinese Stomatological Association organized relevant professional experts and put forward an expert consensus on the basis of considerable discussion. The contents of the present expert consensus covered indications for tooth fixation, material selection of splints and operation methods, applying to the treatment of tooth loosening, tooth displacement and tooth avulsion replantation caused by traumatic injuries. It is also suitable for preoperative and prognosis evaluations of traumatic injured teeth before tooth fixation.
Consensus ; Dentition, Permanent ; Humans ; Splints ; Tooth Avulsion/therapy* ; Tooth Injuries/therapy* ; Tooth Replantation/methods*

A fiber-reinforced composite (FRC) fixed prosthesis is an innovative alternative to a traditional metal restoration, as it is a conservative treatment method. This case report demonstrates a detailed procedure for restoring a missing anterior tooth with an FRC. A 44-year-old woman visited our department with an avulsed tooth that had fallen out on the previous day and was completely dry. This tooth was replanted, but it failed after one year. A semi-direct technique was used to fabricate a FRC fixed partial prosthesis for its replacement. The FRC framework and the pontic were fabricated using a duplicated cast model and nanofilled composite resin. Later on, interproximal contact, tooth shape, and shade were adjusted at chairside. This technique not only enables the clinician to replace a missing tooth immediately after extraction for minimizing esthetic problems, but it also decreases both tooth reduction and cost.
Adult ; Denture, Partial, Fixed ; Female ; Humans ; Prostheses and Implants ; Rehabilitation* ; Tooth ; Tooth Avulsion

Surgical extrusion, immediate extrusion following tooth luxation, is a method to preserve one's natural tooth and achieve esthetic restoration without additional periodontal surgery when subgingival dental caries or crown fracture occurs. A 16-year-old male was referred to the clinic from the department of operative dentistry for the esthetic restoration of maxillary left lateral incisor. Due to the crown to root fracture, the tooth was endodontically treated with a buccal crown length of 4 mm. When the palatal flap was elevated, the mesiopalatal cervical fracture area was situated 3 - 4 mm subgingivally. Crown lengthening was achieved through surgical extrusion. After 3 months of clinical observation and provisional restoration, the maxillary left central incisor was restored with all ceramic crown and obtained a satisfactory clinical result.
Adolescent ; Ceramics ; Crown Lengthening ; Crowns ; Dental Caries ; Dentistry, Operative ; Humans ; Incisor ; Male ; Tooth ; Tooth Avulsion

Dental pulp is a highly vascularized tissue with high regenerative potential. Revascularization of severed vasculature in the tooth is required for pulp healing during avulsed tooth treatment. In this study, the relative expression of angiogenesis-related proteins was determined in human dental pulp cells using a human angiogenesis proteome profiler array. The proteome profiler array detected differentially expressed angiogenesis-related factors under conditions of hypoxia, which enhances the angiogenic potential of dental pulp cells. We confirmed that hypoxia regulates the mRNA expression of angiogenesis-related factors, including CXCL16 in dental pulp cells. Furthermore, conditioned media of hypoxic pulp cells induced tube-like structures of vascular endothelial cells, which were reduced by the neutralization of CXCL16 function. In conclusion, our data show that angiogenesis-related factors are differentially expressed by hypoxia in dental pulp cells and suggest that CXCL16 may involve in the revascularization of hypoxic dental pulp.
Anoxia* ; Culture Media, Conditioned ; Dental Pulp* ; Endothelial Cells ; Humans* ; Proteome ; RNA, Messenger ; Tooth ; Tooth Avulsion

OBJECTIVETo analyze the prognosis of uncomplicated crown fractures and the related factors.

METHODSClinical data of uncomplicated crown fractures treated in Department of Pediatric Dentistry, Peking University School of Stomatology from 2000 to 2006 were collected, and the follow-up period was not shorter than six months. The following information was recorded, including patients' age and gender, type of injury, with or without luxation injury, location of injured tooth, stage of root development, time elapsed between the injury and the first dental care, emergency treatment or not, pulp healing. Logistic regression was used for statistical analysis.

RESULTSThe study comprised of 307 patients with 415 uncomplicated crown-fracture teeth. The frequency of pulp necrosis was significantly higher in crown-fracture teeth with luxation injuries (34.0%) than in crown-fracture teeth without luxation injuries (22.7%) (P < 0.05). Age of patients and type of injury were significantly related to pulp prognosis in crown-fracture teeth without luxation injuries. While stage of root development and type of injury were significantly related to pulp prognosis in crown-fracture teeth with luxation injuries.

CONCLUSIONLuxation injuries was significantly related to the prognosis of uncomplicated crown-fracture teeth.

Child ; Crowns ; Dental Pulp ; Dental Pulp Necrosis ; Humans ; Incisor ; Male ; Retrospective Studies ; Tooth Avulsion ; Tooth Crown ; Tooth Fractures ; Tooth Root

OBJECTIVE: To analyze the etiological and clinical characteristics of oral emergency patients under 18 years with dental trauma, and to provide guidance on the prevention and treatment in children and adolescents. METHODS: A retrospective study on the intact data of the dental trauma patients under 18 years from January 2016 to December 2018 in the Department of Oral Emergency in Peking University School of Stomatology was conducted, and the distribution of the patients' gender, age and visiting time, as well as the number and position of traumatic teeth, diagnostic classification, and multiple injury with dental trauma were analyzed. RESULTS: During the period, 54.2% of the first visit dental trauma patients (10 164) were children or adolescents (5 506). The two peak ages were 3-4 and 7-9 years. The incidence of the male was higher than the female in every age group (Wilcoxon test, P < 0.001). From May to June and September to November, there were more cases of dental trauma. The peak time of daily dental trauma cases was from 19:00 to 20:00 (Jonckheere-Terpstra test, P < 0.001). The positions of traumatic teeth in both sides were approximate symmetrical, and maxillary central incisors were the most affected. 52.3% of the patients suffered multiple teeth injuries. Among the permanent teeth trauma, enamel and dentin fracture was the most common (24.7%), followed by concussion (20.5%), sub-luxation (17.9%) and complicated crown fracture (14.4%). And among the primary teeth trauma, subluxation was the most common (31.1%), followed by concussion (14.5%) and lateral luxation (9.5%). 19.7% of the children and adolescent dental trauma patients were also suffered maxillofacial soft or hard tissue injury. CONCLUSION The incidence of dental trauma in children and adolescents is higher than that in adults. There were two age peaks among the children and adolescents patients. Primary teeth and young permanent teeth were usually suffered. Clinical treatment should be considered along with the characteristics of child tooth growth. In order to prevent the occurrence of dental trauma, early orthodontic intervention should be carried out in children with severe overjet. Families, schools and nursery institutions should strengthen the protection against dental trauma.
Adolescent ; Adult ; Child ; Female ; Humans ; Incisor ; Male ; Overbite ; Retrospective Studies ; Tooth Avulsion ; Tooth Fractures/epidemiology* ; Tooth Injuries/epidemiology*

OBJECTIVES: The purpose of this study was to assess the cognition of 119 emergency medical technician (EMT) on dental emergency treatment. METHODS: A total of 184 subjects completed the questionnaire composed of 14 items during which, 119 EMT participated in periodic refresher training in Jeju province. Independent sample t-test and chi-square test were used to assess the state of 119 EMT on dental emergency treatment. RESULTS: Qualified region of respondents were both in the Jeju province (71.7%) and outside of the Jeju province (28.3%). The class of education on dentistry in formal education that answered 0 hour was 64.7% and 1-3 hours was 16.8% of respondents. The class of refresher training on dentistry that answered 0 hour was 78.3% and 1-3 hours was 13.0%, aggregately 91.3%. The results showed low score in reduction (1.93+/-1.10) and fixation (1.88+/-1.02) of dislocated temporo-madibular joint by 5-point Likert scale. Likewise, the scores were 2.30+/-0.92 in the treatment of maxillofacial trauma, 3.21 +/-1.20 in emergent care of avulsed tooth, and 3.42+/-1.26 in treatment time of avulsed tooth, respectively. The class of education on dentistry in formal education between the qualified regions showed a statistically significant difference (P <.05) and the refresher training time was observed to be borderline (P =0.069). There was no significant difference on the cognition of emergency dental treatment, according to the qualified region. CONCLUSIONS: Considering the result of this study, we think the education of dental emergency could play an important role in the initial management of injuries and suggest a further co-study with EMT.
Cognition ; Surveys and Questionnaires ; Dentistry ; Emergencies ; Emergency Medical Technicians ; Emergency Treatment ; Humans ; Joints ; Tooth Avulsion

OBJECTIVES: This study aimed to evaluate and analyze the current situation of dentists in Guangdong pro-vince regarding the management of avulsed incisors, thereby providing a reference for making treatment strategies for avulsed incisors in the future. METHODS: A total of 712 dentists with different educational backgrounds and working conditions in Guangdong province were randomly selected to conduct an online questionnaire survey on the cognition of children with avulsed incisors from April 2022 to May 2022. The data were recorded by Excel software and statistics were analyzed on Stata/SE 15.1. RESULTS: A total of 712 dentists were investigated and 701 questionnaires were collected (98.46%). In addition, 65.9% of investigators came from the Department of Stomatology in a First-class Hospital or Stomatological Hospital. The results showed that the average number of avulsed teeth consulted by dentists was less than 20 per year. Although 99.7% of respondents considered normal saline as a suitable storage medium, 3.1% and 23.8% of them had a misunderstanding that the tap/alcohol could be used for root cleaning. Moreover, 93.4% was the correct selection rate of the treatment plan for processing on root surfaces before replanting by investigators. The correct selection rate of the duration using elastic fixation was only 10.7%. Meanwhile, 42.9% of investigators refused to inoculate tetanus immunoglobulin after teeth replanting. Emergency management of dental avulsion (EM) and clinical management of dental avulsion (CM) answered correctly with average scores of 14.60±11.85 and 14.48±2.67, respectively. Multivariate linear regression analysis revealed that working years were negatively correlated with EM and CM scores (P<0.05). There was a positive correlation between CM and EM scores with the number of avulsion cases treated by physicians each year (P<0.05). In terms of the EM score of dentists' learning attitude, investigators who had received enough knowledge were higher than those who had not and insufficient knowledge reserved, and the difference was statistically significant (P<0.05). The scores of investigators who thought they had a certain degree of knowledge about dental trauma were higher than those who thought they "did not understand", and the difference was statistically significant (P<0.05). In terms of CM scores, investigators who thought the knowledge of dental trauma was "very helpful" had higher scores than those who thought it was "not helpful", and the difference was statistically significant (P<0.05). The scores of the investigators who thought they had "relatively sufficient knowledge" of dental trauma were higher than those who thought they had "no knowledge" or "insufficient know-ledge", and the difference was statistically significant (P<0.05). CONCLUSIONS The overall accuracy of the management of avulsed incisors among dentists was low in Guangdong province. Dentists were more likely to have a higher rate of accuracy choice in treatment options for luxation injury and avulsion to enhance the prognosis of replanted teeth.
Humans ; Child ; Tooth Avulsion/therapy* ; Incisor ; Tooth Replantation/methods* ; Surveys and Questionnaires ; Dentists ; Cognition ; China ; Health Knowledge, Attitudes, Practice