Abstract
Background: In today’s era implants are mostly used for replacing missing teeth. The greatest challenge for placing an implant is posterior maxillary teeth where the problems arise due to presence of maxillary sinus due which increases the risk of perforating the sinus membrane while implanting. In literature there are many techniques to overcome these problems and place the implant without perforating the sinus membrane. The current study is conducted to check either the traditional technique osteotome or modern technique CAS-Kit is better for placing an implant in posterior maxillary region.
 Objectives: The aim of these study is to compare and evaluate clinical and radiological outcomes of conventional osteotome technique and CAS kit use for indirect sinus lifting in atrophic posterior maxilla.
 Methodology: Two groups (study & control) with 20 individuals requiring implant prosthesis in atrophic posterior maxillary region with RBH < 3mm and minimum crestal width of 6mm are considered for the study model. After completion of osteotome and sinus lift procedure, integrity of sinus membrane will be checked by Valsalva manoeuvre. At three months after implant placement a second step surgery will be performed, stability of each implant will be checked. Marginal bone loss and amount of bone generation will be checked on Cone-beam computed tomography systems (CBCT) at 3, 6 & 9 month interval.
 Expected Results: CAS kit is relatively newer and advanced equipment which is safer in placing implant in posterior atrophic maxilla without perforating sinus membrane with good amount of bone generation and stability of implant. with minimal marginal bone loss.
 Conclusion: Placement of an implant with CAS-Kit is better option than performing osteotome procedure which is time consumable with high chance of membrane perforation and large amount of marginal bone loss.
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