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Biomedical subjects

P Pettini

Publications and source records attributed to P Pettini.

8 recordsLinked to original sources
PubMed1998

Root resorption of replanted teeth: an SEM study.

Two replanted and subsequently expelled upper central incisors were observed under a scanning electron microscope to study the changes brought about by root resorption. The severity of resorption and the distribution of the affected areas were different in the two specimens. In the first case, large, deep excavations were found along a continuous bone defect which exposed the opposite root canal wall. Bacteria-like elements were found on the bottom of the eroded areas both on the outer and on the inner root surfaces. In the second case, resorption denuded the apical portion of the metal post. Erosive lacunae were visible in some areas while tubiform excavations were present close to the apical margin exposing the collagen network. The roots in the first case likely underwent inflammatory resorption while replacement resorption was thought to have occurred in the second case.

Adolescent↗
PubMed1991

[Dentinal lesions caused by the use of endodontic posts].

An endodontic treatment has been effected on 36 extracted teeth, using drills; certain endodontic posts presently on the market have been successively inserted inside 18 teeth: Flexipost (Essential Dental System); Parapost Plus (Whaledent); dentatus (Dentatus). The teeth have been sectionized and watched through a photomicroscope to check an eventual presence of dentinal damages.

Dental Implants↗
PubMed1984

Evaluation of the effectiveness of DDAVP in surgery and in bleeding episodes in haemophilia and von Willebrand's disease. A study on 43 patients.

1-deamino-8-D-arginine-vasopressin (DDAVP), was used in a wide spectrum of clinical situations employing two different dosages (0.3 and 0.4 microgram/kg b.w.) for the management of 43 patients with factor VIII deficiencies--mild and moderate haemophilia A and von Willebrand's disease (vWD). In most instances, the drug was given in association with antifibrinolytics. Twenty-five dental extractions were carried out with two different protocols: one based upon a single infusion and the other based upon three infusions. Bleeding occurred in three patients regardless of the protocol used. The vasopressin analogue promptly stopped bleeding in 12 'spontaneous' open bleeds (haematuria, epistaxis, menometrorrhagia, gum bleeding) and it appears to be also effective in closed bleeds. DDAVP was used to minimize blood loss during surgical interventions and to avoid haemorrhage in the postoperative period. Nine surgical procedures were carried out in six vWD patients and three haemophiliacs. Bleeding occurred late in the postoperative period on one occasion only. No difference was demonstrated between the two doses of the drug either in terms of clinical benefit or rise of factor VIII coagulant activity. The efficacy of DDAVP and the absence of side-effects make this vasopressin analogue worthy of consideration as a reliable alternative to factor VIII concentrates in a wide variety of clinical situations.

Antigens↗
PubMedDate not supplied

[Antibacterial activity of endodontic medications].

BACKGROUND: The successful outcome of endodontic treatment depends on the elimination of bacteria present inside the root canal system. In the pulpal chronic infection, intracanal medicaments are necessary to obtain the sterilization. This study evaluated the antibacterial activities of some intracanal medicaments. METHODS: The bacteria used were: Staphylococcus aureus, Streptococcus viridans, Escherichia coli, Bacteroides fragilis and Candida albicans; the medicaments used were: Stomidros, Stomilex, Endoidros and Cresatina. Wells were punched in plates and filled with the medicaments to be tested. The diameters of the areas of bacterial inhibition were measured and recorded after 24.48 hours and 7 days. RESULTS AND CONCLUSIONS: The most important result of this study is the demonstration of the inefficiency of medicaments like calcium hydroxide against Candida albicans. The Cresatina showed antibacterial activity against all bacteria used.

Bacterial Infections↗