A restrictive appositive provides information essential to identifying the phrase in apposition. A non-restrictive appositive provides information not critical to identifying the phrase in apposition. Adhesion is a much stronger attachment to the endometrium than the loose apposition. Pallidonigral dendrites are entirely covered with synapses without any apposition of glia. Because of the apposition of cementum over the dentin, the dentinocemental junction (DCJ) is formed. Rather, the inner cell mass rotates inside the trophoblast to align to the apposition. Detailed descriptions of epineural repair focus on removal of scar and apposition of healthy tissue. The arytenoid cartilages are held in firm apposition in this voice register also. Each ending consists of a Merkel cell in close apposition with an enlarged nerve terminal. Some annelids and bivalves also have apposition eyes. If the apposition gets further back in the sentence, the comma will precede it directly. Hugo von Mohl (1853, 1858) advocated the idea that the cell wall grows by apposition. Apposition eyes can be divided into two groups. Many texts, for simplicity, use the term "opposition" to represent this component of true apposition. For example, the phrase, "John, my best friend" uses the scheme known as apposition.