A NEW VENEROID GENUS (MOLLUSCA: BIVALVIA) OF THE DANIAN OF PATAGONIA (CHUBUT PROVINCE, ARGENTINA)

Ameghiniana ◽  
2021 ◽  
Author(s):  
Maximiliano Alvarez ◽  
Claudia Del Río
Keyword(s):  
New Genus ◽  
Anterior Teeth ◽  
Hinge Plate ◽  
Salamanca Formation

Abstract. The endemic Patagonian genus Titomaya gen. nov. is erected to include the Danian Meretrix chalcedonica (Lefipan and Salamanca formations) and T. longobucca sp. nov. (Salamanca Formation) from the Chubut Province (Argentina). Although Meretrix and Titomaya share the same characteristic sculpture of their nymphs, Titomaya is differentiated by having medium to small, subtriangular, higher than long shells, a narrower and shorter hinge plate, smaller cardinal and anterior teeth, and by the development of a deeper pallial sinus. This new genus rules out the presence of Meretrix in Patagonia as long believed and increases the list of endemic taxa that characterize the Danian assemblages of Patagonia.

Patellaria: A new genus in the Chenopodiaceae

1976 ◽  
Vol 87 (5) ◽  
pp. 289-292
Author(s):  
J. T. Williams ◽  
A. J. Scott ◽  
B. V. Ford-Lloyd
Keyword(s):  
New Genus

Children's dentistry in general practice. 8. Injuries to anterior teeth of children

BDJ ◽  
1970 ◽  
Vol 129 (8) ◽  
pp. 382-384
Author(s):  
S F Parkin ◽  
J A Hargreaves ◽  
J Weyman
Keyword(s):  
General Practice ◽  
Anterior Teeth

Efficiency of 3% Non-epinephrine Mepivacaine Application During Intraligamentary Anesthesia With Positive and Negative Aspiration in Pain Sensitivity to Electric Current of Young Subject`s Upper Anterior Teeth Pulp:

2017 ◽  
Vol 1 (1) ◽  
Keyword(s):  
Pain Sensitivity ◽  
Pain Threshold ◽  
Young Subject ◽  
Reference Level ◽  
Maximum Effect ◽  
Anterior Teeth ◽  
Randomized Controlled Studies ◽  
Group Methods ◽  
Peak Increase ◽  
Infiltration Anesthesia

Background: Separation methods of local anesthesia to diffuse and vascular must significantly affect the clinical effect of adrenaline containing local anesthetic (mepivacaine). The aim of this prospective, randomized, controlled studies µAde was to compare the degree of anesthesia of intact upper lateral incisor the cartridge ¼ 3% mepivacain without epinephrine in the group after the infiltration and after intraligamentary anesthesia (ILA) in the experimental group. Methods: Anesthesia performed computer syringe Sleeper One 86 subjects aged 20-23 years. In all cases, aspiration was performed. With pulp tester IVN-01 measured the pain threshold incisors and canines in microamperes during the anesthetic effect. Results: Reference level of all researched teeth (86 subjects) was ranged from 1 to 10 µA. Uniform pain threshold increase to 95 (±20) µA by 5 min. watched during infiltration anesthesia then this value gradually descended to reference level (by 20 min.). Peak single increase of pain threshold to 55 (±8,9) µA occurred immediately after 1st minute of ILA, then this value subsequently drops to reference level (10 µA) by 20 minutes. Difference between groups of infiltration and intraligamentary anesthesia (ILA+ red) and (ILA – green) presented on Chart 6. Conclusions: Infiltration anesthesia with mepivacaine without epinephrine smoothly diffusely increased the pain threshold of the front teeth, reaching a significant, maximum effect by 5 minutes. Intraligamentary injection immediately after administration created a peak increase in pain sensitivity at a lower level, almost without the participation of the diffuse component.

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