Humans ; Periapical Diseases ; therapy ; Periodontal Diseases ; therapy ; Tooth Crown ; injuries ; Tooth Diseases ; therapy ; Tooth Root ; injuries

OBJECTIVETo discuss orthodontic extrusion of crown-root fractured teeth before restoration.

METHODS3 cases with fractured teeth and 2 cases with root caries were performed canal therapy.

RESULTSOrthodontic extrusion of the root was carried out before restoration. All cases were satisfactory after treatment.

CONCLUSIONSOrthodontic extrusion of remaining root before restoration not only can maintain the remaining root but also obtain functional and esthetic results.

Humans ; Root Canal Therapy ; Root Caries ; therapy ; Tooth Crown ; injuries ; Tooth Fractures ; therapy ; Tooth Movement Techniques ; methods ; Tooth Root ; injuries

Humans ; Root Canal Therapy ; Tooth Apex ; Tooth Root ; injuries

Crowns ; Humans ; Post and Core Technique ; Tooth Crown ; injuries ; Tooth Diseases ; therapy ; Tooth Root ; injuries

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*

Child, Preschool ; Dental Restoration, Permanent ; Dentition, Permanent ; Humans ; Infant ; Root Canal Therapy ; Tooth Avulsion ; therapy ; Tooth Crown ; injuries ; Tooth Extraction ; Tooth Fractures ; therapy ; Tooth Injuries ; therapy ; Tooth, Deciduous ; injuries ; Tooth, Impacted ; etiology

Child ; Composite Resins ; Dental Bonding ; Dental Restoration, Permanent ; Dentition, Permanent ; Humans ; Incisor ; injuries ; Tooth Crown ; injuries ; Tooth Injuries ; therapy

Cone-Beam Computed Tomography ; methods ; Humans ; Risk Factors ; Tooth Extraction ; Tooth Fractures ; diagnosis ; diagnostic imaging ; etiology ; therapy ; Tooth Root ; injuries

OBJECTIVETo evaluate the bone density changes in the apical area of subgingivally fractured tooth after rapid orthodontic extrusion.

METHODSTwelve fractured incisors in 11 patients extended 2 - 5 mm below the gingival line were selected. Two weeks after root canal therapy, the subgingival fragment was lifted up and the fracture line was brought 1.5 - 2.0 mm above the level of the gingival line by means of edgewise fixed appliance. After the extrusion completed, the tooth had been stabilized and held for 6 months. The CT Analyser software was used to measure the bone density changes in the apical area on radiographs once a month. Changes of relative value in bone density was quantitatively analyzed.

RESULTSThe average period of extrusion was 11 days. The relative value of bone density in the apical region was -39.6% immediately after extrusion and continuously increased afterwards. In the third month, the value (18.5%) changed most rapidly (P < 0.01).

CONCLUSIONSUnder the continuous and proper tooth axial extrusion force, the tooth moved rapidly and steadily. The bone density in the apical area approached normal value within 3 months after treatment.

Adult ; Bone Density ; physiology ; Female ; Humans ; Incisor ; immunology ; Male ; Orthodontic Extrusion ; methods ; Orthodontic Wires ; Tooth Fractures ; physiopathology ; therapy ; Tooth Root ; injuries ; Tooth Socket ; physiopathology

OBJECTIVETo evaluate the clinical results of three bonding patterns for the reattachment of anterior fractured teeth.

METHODSThe reattachment of 59 anterior fractured teeth was performed using three bonding patterns, which were pattern A (pulp chamber concave + labial chamfer), pattern B (pulp chamber concave + lingual notch) and pattern C (pulp chamber concave + lingual notch + labial chamfer), and followed up for more than 24 months. Pattern A, B and C were 14 teeth, 14 teeth and 31 teeth, respectively. Twenty-one sectioned maxillary central incisors (obtained from patients with periodontal disease) whose edge fragments reattached using the three bonding patterns were used for the experimental study of shear bond strength, and each pattern was used in 7 teeth.

RESULTSThree reattached teeth fractured again due to another trauma, two of which was pattern B and one was pattern A. The reattachment of the remaining 56 anterior fractured teeth was successful after a follow up of mean 28.3 months. The experimental study showed that bonding pattern A and C could bear more shear stress than bonding pattern B (F = 5.161, P = 0.017).

CONCLUSIONSThe present study suggests that bonding pattern A (pulp chamber concave + labial chamfer) and C (pulp chamber concave + lingual notch + labial chamfer) were the best methods for the reattachment of fractured anterior teeth.

Adolescent ; Child ; Dental Bonding ; methods ; Female ; Follow-Up Studies ; Humans ; In Vitro Techniques ; Incisor ; injuries ; Male ; Middle Aged ; Shear Strength ; Tooth Crown ; injuries ; Tooth Fractures ; therapy