Abstract
Abstract Post extraction alveolar ridge preservation is a preventive oral surgical procedure aimed to preserve the dimensions of the alveolar ridge after removal of the teeth. According to literature data, the utilization of guided bone regeneration for this purpose is absolutely justified. The aim of this study was to examine the effect of resorbable collagen membranes placed in two layers in respect to the application of membranes placed in one layer to the degree of bone regeneration after a tooth extraction. This experimental study was conducted on six adult dogs. In the first phase all four premolars were extracted on both sides in the lower jaw. After the volume-standardisation with bone drill, three post extraction alveoli were filled with bone substitute of equine origin and then covered with: collagen bioresor bable membrane of porcine origin; collagen bioresorbable membrane of equine origin; pericardial bioresorbable membrane of equine origin. The membranes on the left side were placed in single-layer and on the right side in double-layer manner. After different monitoring periods, histopathological analysis of the samples taken from the experimental regions was performed. A different degree of bone regeneration was achieved between experimental regions in which membranes were placed in one layer and those where membranes were placed in two layers. There was no difference between regions where membranes of different origin were placed in the same manner. The procedure of covering the post extraction alveoli, filled with bone substitute and with resorbable membranes placed in two layers resulted in a higher degree of bone regeneration compared to those where resorbable membranes were placed in one layer.
Highlights
Many factors can lead to the loss of alveolar bone, such as periodontal disease, facial trauma, aggressive tooth extraction and other
During histopathological analysis of specimens taken from the experimental regions, it was noted that there were different degrees of bone regeneration between experimental regions in which membranes were placed in one layer and those where the membranes were placed in two layers
Healing of the tooth extraction wound is the physiological process of bone tissue reparation and regeneration, which differs from the healing process elsewhere in the body
Summary
Many factors can lead to the loss of alveolar bone, such as periodontal disease, facial trauma, aggressive tooth extraction and other. In order to enable and stimulate regeneration, defects are often filled with bone substitutes [1,2,3]. It is necessary to preserve somehow the horizontal and vertical dimension of the alveolar ridge, that is, to direct the healing of the post-extraction wound in a desirable direction, toward regeneration rather than reparation. According to the available literature data, the utilization of guided bone regeneration for the purpose of the alveolar ridge preservation after a tooth extraction is absolutely justified [4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22]. In order to solve this problem, the application of barrier membranes is indicated [23]
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