6Gautham Kumar N, Mehta DS. Short term assessn t of the Nd : YAG laserwith andwithout sodium fluoride varnishinthetreatment ofdentin hypersensitivity-a clinical and scanning electron microscopy study [J]. J Periodontol,2005,76(7) :1140-1147.
7Hammerle CH,Chen ST.Consensus statements and recommendedclinical procedures regarding the placement of implants in extractionsockets[J].Int Jf Oral MaxiIlofac Implants,2004,19(suppl):26-28.
8Chen ST,Buser D.Clinical and esthetic outcomes of implants placedin postextraction sites[J].Int J Oral Maxillofac Implants,2009,24(suppl):186-217.
9Hassel AJ.International reliability in clinical measurement of LChvalues of anterior teeth using a spectrophotometer[J].Int J Prosth-odont,2007,20:79-84.
10Jarad FD,Russell MD.The use of digital imaging for color matchingand communication in restorative dentistry[J].British Dental Jour-nal,2005,199:43^9.
