To evaluate and compare the marginal fit of crowns fabricated by three All Ceramic CAD-CAM systems using their respective scanners.

1. To evaluate the marginal fit of All Ceramic crowns fabricated using Contact scanner- Procera system. 2. To evaluate the marginal fit of All Ceramic crowns fabricated using Optical scanner-Lava system. 3. To evaluate the marginal fit of All Ceramic crowns fabricated using Laser scanner-Cercon system. 4. To compare the marginal fit of crowns fabricated by three All Ceramic CAD-CAM systems using their respective scanner-Contact scanner, Optical scanner and Laser scanner.

5 crowns fabricated with Contact scanner- Procera system (Group I), 5 crowns fabricated with Optical scanner-Lava system (Group II), 5 crowns fabricated with Laser scanner-Cercon system(Group III). The marginal fit would be evaluated at two stages for each group: A- Pre-veneering stage (coping) B-Post-veneering stage (crown).

The mean value of marginal gap with Group IA was 27.48 +2.63 and IB was 26.13+ 0.85 and that of Group IIA was 23.27 + 0.99 and IIB 19.22 + 0.88. The mean value of marginal gap of Group IIIA was 32.80 + 2.46 and IIIB was 28.77 + 1.94.

The marginal gap was maximum with Group III and minimum with group II amongst the three used systems. The mean marginal gap values of subgroup B were less than subgroup A.

Bilateral furcation involvements are a common occurrence. This case demonstrates the surgical treatment of bilateral furcation involvement at a single appointment. This article presents successful management of bilateral class II furcation involvement affecting lower molars with particulate bonegraft (betaTCP + HA) and guided tissue generation(GTR) bioabsorbable membrane. This article reiterates the fact that class II furcations are ideal cases for therapy bone graft +GTR and respond favorably to this therapy. Further treatment at a single appointment is more convenient and time saving for both the patient and the operator when the patient is deemed compliant to follow post operative instructions.

Adenomatoid Odontogenic Tumour (AOT) is an unusual benign tumour unique to maxillofacial area, with a tendency to involve the tooth bearing areas of both the jaws and accounting for 3% of all the odontogenic tumours. Diagnosis of the tumour is sometimes intriguing owing to its variable clinical and radiographic presentation. One such variable and relatively rare presentation of extrafollicular type of adenomatoid odontogenic tumour in anterior maxilla of an eighteen year old female has been discussed in this paper which can be refreshing for the practitioner.

Preventive Prosthodontics emphasizes the importance of any procedure that can delay or eliminate future prosthodontic problems. The conventional modality of treatment for partially edentulous arches with presence of a few teeth, was either to render them completely edentulous by extracting the remaining teeth and providing complete dentures, or restoring them with removable partial dentures. An overdenture with support of few remaining teeth can also be provided as a good alternative. Various attachments and types of overdentures can be fabricated on the retained teeth or roots. The telescopic crowns for the overdenture can be given as a successful attachment. This article presents the simplified technique of telescopic overdenture using customized double copings for the overdenture abutments.

Variation of root canal anatomy is always a challenge for accurate diagnosis and successful endodontic therapy. A thorough knowledge of most common anatomic characteristics and their possible variations is essential for the clinician. The hard tissue repository of the human dental pulp takes on numerous confi gurations and shapes. These aberrations occur so often that they can be considered as normal anatomy. Radix entomolaris (RE) is one such aberration where an extra root is present on the distolingual aspect of mandibular first molar (molar with 3 roots). This article presents one case report of mandibular first molars with extra roots which was successfully treated.

Crown fracture is the most common type of dental injuries. One of the options of management of crown fracture is fragment reattachment, whenever intact tooth fragment is available after trauma. The fragment reattachment procedure presents a conservative, simple and esthetic alternative. This article presents two case reports of restoration of fractured maxillary central incisor using fragment reattachment.

Since turn of the 20th century orthodontic diagnosis and treatment planning has been based on the Angle paradigm that considers ideal dental occlusion ‘nature's intended ideal form’. The orthodontist's task is to seek balance between the patient's aesthetic demands, functional efficiency and structural harmony. The soft tissues largely determine the limitations of orthodontic treatment, from the perspectives of functions and stability, as well as aesthetics. Therefore orthodontist must plan treatment within the patient's limits of soft tissue adaptation and soft tissue contours. This is a case report showing a well finished case keeping in mind the emerging soft tissue paradigm in diagnosis and treatment planning.

According to the WHO (2005) classification of odontogenic tumors, Desmoplastic Ameloblastoma is recognized as a variant of ameloblastoma. This rare entity differs from the other forms of ameloblastoma in its anatomical location, morphology, and radiographic appearance. Due to its unusual clinic-pathological presentation, this tumor mimics various odontogenic as well as non odontogenic neoplasms. We are presenting a rare case of desmoplastic ameloblastoma in the maxilla in a 53 year old male with regards to its clinical and radiographical and histological viewpoints.

Herpes zoster is a common acute viral infection caused by reactivation of Varicella-Zoster virus. Acute pain of herpes zoster lowers the quality of life and interferes with day to day activities. We report a case of herpes zoster in a 68 year old, healthy male patient in which the prodromal symptoms started as toothache. This case highlights the importance of a thorough dental history and examination in patients with toothache.

Florid cemento-osseous dysplasia (FCOD) is an uncommon benign multifocal dysplastic lesion affecting the jaws that consists of cellular fibrous connective tissue with bone and cementum like tissue. It is most commonly seen in middle aged black woman although it can occur in Caucasians and Asians. A case of FCOD in a 63 year old Indian woman with unique radiographic and clinical presentation is reported.