Unusual role in occlusion and mastication of a horizontal positioned erupted mandibular third molar: a rare case.

Lower third molars are frequently extracted due to pathologies of the dental follicle, pericoronitis, advanced carious lesions, orthodontic reasons (risk of anterior tooth crowding) or causing periodontal or carious lesions in the distal area of the second molar. The case presented here is of a male patient that came to our Clinic experiencing pain in the distal area of one of his old bridges. The clinical examination revealed a malpositioned, but unusually functional third molar; it is a very rare situation for an initially impacted third molar to erupt in an almost horizontal position and not only to remain on the arch for a very long period of time, but also to contribute to mastication efficiency and occlusion, despite the fact that masticatory forces are distributed at a right angle on its long axis and that mastication takes place on the distal surface of the crown and root, and not on the usually occlusal cusped surface.

Orthodontic treatment of a non-syndromic patient with congenital agenesis of multiple permanent teeth: a rare case.

This article presents the first stage of treatment, respectively the orthodontic management of a non-syndromic, 13-year-old patient, with multiple and asymmetric missing teeth. The difficulty of the case was increased by the association of an impacted premolar and also by the loss, due to extended caries, of three of the first permanent molars. The patient came from a rural area, where access to dental treatment was limited.

Mandibular lateral incisor-first premolar transposition in early mixed dentition: a rare case.

Dental transposition is an anomaly of eruption which is usually seen in the maxilla and rarely in the mandible. The mandibular lateral incisor's transposition with the permanent canine has a prevalence of less than 0.03%.

A rare find of a maxillary third molar with five roots: a case report of an unusual morphology.

Third molars are frequently absent or impacted; their unpredictable prevalence and morphology, with frequent anatomical variations, is a challenge for the practitioner. The number of roots of the upper third molars vary from one to five, but five roots upper third molars' cases are extremely rare. The case reported here is of a normotrophic male patient, with no significant general medical history, having extracted an impacted maxillary upper molar, with an unusual position and dimensions and five completely separated formed roots, orientated in diverse directions.

Unilateral agenesis of permanent superior canine in familial peg-shaped lateral incisors: rare case report and literature review.

Agenesis of permanent maxillary and mandibular canines is very rare; one to all four can be missing, isolated or in association with other missing teeth or with dental morphology abnormalities. Such cases can present functional, esthetic, and psychological problems, since the canine's role in functional occlusion and in obtaining an aesthetic smile is crucial. Frequently, the canine's absence from the arch is caused by impaction; its congenital absence is extremely rare in patients with no associated syndrome.

A rare case of transmigrated mandibular canine and combined orthodontic-surgical management.

Canines are paramount teeth for esthetics and function. Transmigration of the lower permanent canine is a rare process of alteration of the eruption path toward the opposite part of the mandible. The position of the migrating tooth varies at different ages, so early detection of the tendency to cross the midline is crucial; canines that have already passed through the center of the mandible can be impossible to realign.

Supernumerary permanent maxillary canine - a rare finding: case report and literature review.

Supernumerary teeth are dental units that appear in addition to the regular number of teeth. Their most frequent location is the anterior maxilla, especially on the maxillary midline, being called mesiodens, but also paramedian or in the position of a lateral incisor. On the other hand, the permanent canine is one of the most stable teeth regarding the number, with very few cases reported about hypo- or hyperdontia.

Base Materials' Influence on Fracture Resistance of Molars with MOD Cavities.

The aim of this study was to compare fracture resistance of teeth presenting medium-sized mesial-occlusal-distal (MOD) cavities using different base materials. Thirty-six extracted molars were immersed for 48 h in saline solution (0.1% thymol at 4 °C) and divided into six groups.

Periodontal clinico-morphological changes in patients wearing old nickel-chromium and copper alloys bridges.

Elderly population frequently presents more than one prosthetic restoration realized from different types of dental alloys which, in time, suffer various alterations in the oral environment. Metallic ions are released in saliva due to its electrolytic qualities, interacting with the contact tissues. Studies regarding cytotoxicity of dental alloys are providing contradictory results.