Copyright © Dr. Aabu Varghese et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. International Journal of Dental Research, 8 (1) (2021) 1-8 International Journal of Dental Research Website: www.sciencepubco.com/index.php/IJDR Research paper Evaluation of hybrid implant in posterior edentulous maxilla with inadequate bone Dr. Aabu Varghese 1 *, Dr. Varghese Mani 1 , Dr. Sankar Vinod V 1 , Dr. Arun George 1 1 Department of Oral and Maxillofacial surgery, Mar Baselios Dental College , Thangalam, Ernakulam,686691, Kerala, India *Corresponding author E-mail: aabuvarghese@gmail.com Abstract Aim of this study is to investigate. Hybrid implant has got satisfactory results in our previous study in various edentulous areas with inadequate bone for endosseous im- plant placement .The credibility of the implant in the areas of posterior maxilla needed to be evaluated. Objectives • To evaluate the hybrid implant postoperatively 18 months for gingival status, pain, peri-implantitis and mobility, so that it can be applied in posterior maxillary edentulous spaces with inadequate bone as an alternative to conventional implant. Materials and methods 15 patients were rehabilitated in the posterior edentulous areas with hybrid implant. we intended to study the rehabilitation of posterior maxillary edentulous space i.e. Maxillary- premolar, 1st molar and 2nd molar area with hybrid implant and evaluate the hybrid implant post operatively for 18months (1stmonth, 3rd month, 6th month ,12 th month,18thmonth). Results • During the study period the implant system presented with no gingivitis, peri-implantitis, and pain. • The periotest test values show the implant system to be very much stable. • Also proves to be safe, economical and clinician and patient friendly compared to other implant systems. Conclusion • Hybrid implant system proves to be very effective in rehabilitating the posterior maxillary regions with inadequate bone. • Also proves to be safe, economical and clinician and patient friendly compared to other implant systems. Keywords: Hybrid Implant; Sinus Lift; Posterior Maxillary Edentulous Areas. 1. Introduction In 2014 Varghese Mani et al 1 reported a novel implant system which can very well handle atrophic maxilla without sinus lift and grafting procedures .A report of two cases on atrophic posterior maxilla had been given with a follow up of one year. The implant showed good stability with minimum postoperative complication. Moreover the CBCT shows the implant osseointegrated with no peri -implant bone loss. Here we are reporting the results of fifteen implants placed in relation to posterior maxillary region and the stability of the implant has been tested with periotest post operatively at various intervals ( 1st month,3 rd month,6 th month,12 th month ,18 th month). 2. Materials and methods POPULATION: All patients above 20 years who reported to outpatient department of Mar Baselios Dental College, Kothamangalam for replacement of the missing tooth according to the inclusion and exclusion criteria. All the patients were explained about the method of the study, about the new implant system, possible complications and other alternative methods of replacement of missing teeth and a detailed consent is taken from patients who are willing to participate in the study Inclusion criteria 1) All patients above the age group of 20 years. 2) Patients who needs replacement of single or multiple teeth in the posterior maxillary edentulous spaces (maxillary –premolar, 1st molar, 2nd molar areas). 3) Proper oral hygiene. 4) Adequate patient compliance. Exclusion criteria 1) Medically compromised patients. 2) Inadequate patient compliance. 3) Patients with craniofacial syndromes.