OBJECTIVE To test the hypothesis that there is no difference in the effect of different continuous moderate to very heavy forces on root resorption or amount of tooth movement. MATERIALS AND METHODS In the study, 10, 25, 50 and 100 g mesial force were applied to the maxillary first molars of rat using nickel titanium closed-coil springs for 3 days, 14 days, and 28 days. The molars were extrac...

OBJECTIVE Molar intrusion by mini-screw implantation can cause different degrees of root resorption. However, most methods (2-D and 3-D) used for evaluating root resorption have focused on the root length without considering 3-D resorption. The purpose of this study was to volumetrically evaluate root resorption using cone beam computed tomography(CBCT) after mini-screw implant intrusion. MAT...

The purpose of the investigation was to establish the exact number of root canals in the maxillary first permanent molar, their direction, type and relation, based upon a large number of random samples. Randomly chosen 443 maxillary first permanent molars (221 left and 222 right) were investigated with the aim to get more knowledge into the morpho­ logy of the endodontic space. One canal in the...

PURPOSE This is the first study to analyze the positions and angulations of the central maxillary incisors with reference to the alveolus, providing data for clinicians to achieve good esthetic results for immediate implant placement in the esthetic zone. MATERIALS AND METHODS A total of 300 cone beam images were selected randomly. Five aspects were measured: the thickness of the palatal and ...

Conventional devices used for surgically assisted rapid palatal expansion are tooth-borne. Dental fixation entails a number of possible drawbacks such as loss of anchorage, skeletal relapse during and after the expansion period, cortical fenestration and buccal root resorption. A bone-borne titanium device with interchangeable expansion modules, used with a callous distraction policy, is presen...

knowledge about the morphology of the root canal system is a pre-requisite for achieving a successful outcome in root canal treatment. in this report, a patient with a maxillary lateral incisor which had previously undergone orthograde endodontic retreatment for two times is discussed. the tooth had been misdiagnosed with a palatal groove or a root fracture, its prognosis had been determined to...

Sodium hypochlorite was inadvertently injected into the maxillary sinus during root canal treatment of the right maxillary first molar. Sterile water irrigation of the sinus was effected through the palatal canal. The expected sequelae of pain, significant edema, and hemorrhage were not experienced.

AIM To analyse the effect of ferrule height upon the mechanical resistance and stress distribution within a root to explain variations in the pattern of root fracture. METHODOLOGY An extracted, intact, caries free, maxillary right central incisor was scanned by laser and then reconstructed on a computer to produce a model of the tooth and associated periodontal ligament. A simulated post/core...

sufficient remaining structure is available to retain the core. There are different materials and techniques to construct post-and-core, but there is no consensus about which one promotes better stress distribution on the remaining tooth structure. This study aimed to quantify and evaluate the distribution of stress in the root produced by customized glass fiber posts compared to different endo...

OBJECTIVE The aim of this study was to investigate the root and canal morphology of maxillary third molars in Central India population using cone-beam computed tomography (CBCT) analysis. MATERIALS AND METHODS CBCT images of 116 maxillary third molars were observed, and data regarding the number of roots, the number of canals, and Vertucci's Classification in each root was statistically evalu...