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At least 271 records · Page 15Linked to original sources
PubMed1976

[Experimental horizontal fractures of front tooth roots and their endodontic endosseous pin fixation in monkeys].

Pathologically movable anteriors with horizontal root fracture can be fixed by endodontal bone pins, unless the fracture is located in the cervical third of the root canal. The apical root fragment needs to be removed for fixation. As the anatomic conditions in monkeys do not permit adequate preparation of the root canal required for endodontal pin fixation, the histological findings can be transferred to man to a limited extent only.

Animals↗
PubMed1987

Implications of tooth root hypercementosis in a Barbados slave skeletal collection.

A 17th- to 19th-century cemetery sample of 104 slaves from Newton Plantation (Barbados) shows uniquely high hypercementosis prevalence, as well as unexpectedly high and variable skeletal lead content. A variety of biological and archeological factors indicates that individuals with lower amounts of these anomalies (relative to age at death) were probably African-born, first-generation slaves. The hypercementosis is related to the progression of periodontal disease as assessed from alveolar bone. Although the hypercementosis is endemic in the Caribbean black population, it does not as yet have a clear explanation. We suggest the etiology might relate to chronic malnutrition involving periodic, seasonal rehabilitation.

Black or African American↗
PubMed2001

A novel in vitro model system to grow films of oral bacteria for the study of human tooth root surface caries.

AIMS: To develop a simple and flexible novel in vitro model system to grow films of oral bacteria that could be used to study aspects of dental caries. METHODS AND RESULTS: Standardized suspensions of bacteria were inoculated into Ultrafree-CL (Millipore) ultrafiltration units at various densities. These were incubated for varying time intervals with a range of carbon sources. The bacterial films reproducibly achieved between 107 and 108 cfu cm-2, irrespective of the number inoculated and with no significant changes for 14 d. However, Streptococcus mutans grew through membranes with pores of diameter greater than 0.1 microm after 6 d. Culture of films in sucrose or water for 6 d led to a decreased number of colony-forming units, but returning them to broth reversed this. CONCLUSION: Reproducible films of oral bacteria can be cultured in Ultrafree-CL units. SIGNIFICANCE AND IMPACT OF THE STUDY: This study has shown that Ultrafree-CL units can be used as a simple model system to grow biofilms that could be used for dental caries research.

Biofilms↗
PubMed1992

[Skin symptoms of chronic inflammation of a tooth root apex].

Cutaneous manifestations of a periradicular inflammation are now uncommon. In most cases the periradicular infection results in the development of an apical granuloma. If there is proliferation of resting epithelial cells in this granuloma a cyst will develop, the so-called radicular cyst. A rare form of periradicular inflammation is the so-called chronisch granulierende Entzündung nach Partsch [Partsch's chronic granulomatous inflammation]. In this case the granulation tissue spreads through the bone and results in a cutaneous odontogenic sinus. We report on a female patient in whom complete healing was obtained by removal of the periradicular process and excision of the sinus tract.

Adult↗
PubMed2006

Rationale for socket preservation after extraction of a single-rooted tooth when planning for future implant placement.

After tooth extraction, the alveolar ridge will commonly decrease in volume and change morphologically. These changes are usually clinically significant and can make placement of a conventional bridge or an implant-supported crown difficult. If bone resorption is significant enough, then placement of an implant may become extremely challenging. Postextraction maintenance of the alveolar ridge minimizes residual ridge resorption and, thus, allows placement of an implant that satisfies esthetic and functional criteria. Recent advances in bone grafting materials and techniques allow the dentist to place implants in sites that were considered compromised in the past. This article focuses on the healing pattern of sockets, with and without the use of regenerative materials, and the rationale for preserving the dimensions of the extraction socket. Histologic and clinical evidence is reviewed to provide an in-depth understanding of the logic behind and value of socket preservation.

Alveolar Bone Loss↗