Related Experiment Video
Updated: Mar 23, 2026
13:34
Production, Crystallization and Structure Determination of C. difficile PPEP-1 via Microseeding and Zinc-SAD
Published on: December 30, 2016
12.1K
Unusual finding of concrescence.
Daniel Palermo1, Ayisha Davies-House2
1Department of Oral & Maxillofacial Surgery, Arrowe Park Hospital, Upton, Merseyside, UK Department of Oral & Maxillofacial Surgery, Alder Hey Children's NHS Foundation Trust, Liverpool, Merseyside, UK.
BMJ Case Reports
|March 25, 2016
Summary
Concrescence, a rare dental anomaly where teeth fuse via cementum, can lead to accidental extraction of adjacent teeth. Early diagnosis is crucial for informed patient decisions and to prevent dental malpractice.
Area of Science:
- Dentistry
- Oral and Maxillofacial Surgery
- Dental Anomalies
Background:
- Concrescence is a rare dental anomaly characterized by the fusion of adjacent teeth by cementum.
- It occurs in approximately 0.8% of permanent dental extractions.
- Accurate pre-operative diagnosis is vital for patient consent and to mitigate dentolegal risks.
Observation:
- An 83-year-old female patient presented for extraction of an upper left first molar.
- During extraction, the upper left second molar was inadvertently removed due to fused roots.
- Clinical examination confirmed the fusion, establishing a diagnosis of concrescence.
Findings:
- The case highlights a diagnostic challenge in managing concrescence.
- Accidental extraction of a second tooth occurred due to undetected root fusion.
- The patient was informed, and a follow-up appointment was scheduled.
Implications:
- Undiagnosed concrescence can lead to complications during routine dental procedures.
- Improved diagnostic methods and clinician awareness are necessary.
- This case underscores the importance of thorough pre-surgical evaluation in oral surgery.
Related Concept Videos
01:20Concrete
1.3K
Concrete is a vital construction material extensively used worldwide, primarily valued for its strength, durability, and versatility, which it provides for various structural designs. Concrete generally comprises ingredients like Portland cement, coarse gravel, fine sand, and water. Concrete can be mixed by simple hand methods or industrially at computer-controlled plants. The mixture consists of aggregates and a paste made from water and Portland cement. This paste coats the aggregates and,...
1.3K
01:10Types of Coprecipitation
6.9K
Coprecipitation is the contamination of a precipitate by otherwise soluble species and occurs via different processes. In colloidal precipitates, coprecipitation occurs via surface adsorption. For instance, barium sulfate has a primary layer of adsorbed barium ions and a secondary layer of nitrate counterions. This results in contamination of the precipitate by barium nitrate.
Sometimes, ions in a crystal lattice can undergo isomorphous replacement by inclusions of similar charge and size. For...
Sometimes, ions in a crystal lattice can undergo isomorphous replacement by inclusions of similar charge and size. For...
6.9K
01:22Mass Concreting
436
Mass concreting refers to the process of placing large volumes of concrete, such as in gravity dams. The heat generated during the cement hydration process and differential cooling rates within the concrete mass can lead to a temperature gradient, which can result in thermal cracks in the concrete mass.
To reduce the risk of such cracking, the concrete mix may incorporate low-heat cement and pozzolans to reduce the temperature rise. Pre-cooled angular aggregates and water-reducing admixtures...
To reduce the risk of such cracking, the concrete mix may incorporate low-heat cement and pozzolans to reduce the temperature rise. Pre-cooled angular aggregates and water-reducing admixtures...
436
01:12Precipitation Processes
6.5K
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
6.5K
01:15Reinforced Brick Masonry
2.0K
Reinforced brick masonry is an advanced construction technique that enhances the structural integrity of brick walls by incorporating steel reinforcements. These reinforcements are either placed within the hollow cores of bricks or sandwiched between two layers of masonry, known as wythes, and are then secured in place with grout. Grout is a fluid mixture composed of Portland cement, aggregate, and water, providing the necessary bonding agent for the steel and brick.
To fortify brick walls...
To fortify brick walls...
2.0K
01:10Recrystallization: Solid–Solution Equilibria
4.7K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
4.7K