ABSTRACT
Purpose: This study was aimed to compare the efficacy of two different concentrationas of ropivacained with lidocaine containing epinephrine for intraligamentary anesthesia
Materials and Methods: Thirty volunteers had intraligamentary injections of 2% lidocaine with 1:100,000 epinephrine, 0.5% ropivacaine, or 1% ropivacaine at the upper lateral incisor and lower first bicuspid teeth. The response of the test teeth to electrical pulp testing and the reaction of the gingiva to sharp probing were assessed up to 30 minutes after injection. Injection discomfort and side effects were also recorded. Data were analyzed by using the chi-square test and analysis of variance
Results: Lidocaine with epinephrine was more successful than the ropivacaine solutions in obtaining pulpal anesthesia [chi square = 11; P<0.002] and produced longer pulpal [F = 19; P<.001] and soft tissue [F=14; P<0.001] anesthesia. Injection discomfort and incidence of side effects were similar between solutions, and no serious adverse effects were produced
Conclusion: Plain ropivacaine is less effective than lidocaine with epinephrine as an intraligamentary anesthetic
ABSTRACT
Purpose: This study was undertaken to demonstrate histologically and histochemically the difference of bone healing using Equine Heterologous Bone versus Bovine Bone in induced bony cavities in the submental area of guinea pigs
Materials and Methods: Fifteen adult male guinea pigs with an average weight of 400-500 grams were used in this study. Each animal was subjected to implantation of the spongy granular form of Equine Heterologous Bone Tissue [Bio Gen] in an induced bony cavity through the right submental area of the mandible adjacent to the midline [study side]. A similar bony cavity was made on the left side [control side] adjacent to the midline in the same animals for implantation of Bovine Bone [Bio-Oss]. Animals were classified into 5 groups [3 animals each] according to the predetermined time of sacrifice; at 1 month [group I], 1.5 months [group II], 2 months [group III], 4 months [group IV] and 6 months [group V]. Bony specimens were decalcified in EDTA and processed for paraffin embedded sections [buccolingual sections of 4 micro thick] for histological and histochemical examination
Results: Both histological and histochemical results showed faster bone formation and maturity of study side osseous defects at all study periods than its counterparts of the control ones. In addition, the total proteins of the formed bone in the study side sections were less than the control side ones
Conclusion: The histological and histochemical results of this study revealed that Equine Bone Tissue was integrated and subsequently replaced by new bone formation with faster maturity than was the Bovine Bone
ABSTRACT
The aim of this article is to present a modification of Minkow's approach for open reduction and fixation of mandibular fractures in children using a single 40-cm length Ivy loop wire. This wire was used with its two tails modified into two circummandibular wires. This modification has the advantages of maintaining the fragments in close proximity with no need for additional wires, and no need for surgery to remove the wire