Aim: To review the validity of Ridge Mapping technique as reliable method to assess the bucco–lingual ridge width prior to implant placement. Materials and Method: The literature search was done electronically and also hand searched with the terms such as Ridge Mapping, Alveolar Ridge Width, Implants and Bucco–Lingual Width. The search was limited to full text articles which are published in English language only. The search was performed through Medline and Google. A total of 85 articles were found and out of these 66 were not related to present search and hence were excluded from the study. Finally 19 articles were found to be relevant. Results: All the techniques having some advantages and disadvantages with reliable results. Conclusion: The results of the study showed that, the Ridge Mapping is a reliable, simple and easy to perform at chair side technique to assess the bucco–lingual width of the alveolar ridge