Fabrication of a Mandibular Bar Supported Overdenture Using Preci-Vertex System

Case Report

J Dent & Oral Disord. 2017; 3(2): 1056.

Fabrication of a Mandibular Bar Supported Overdenture Using Preci-Vertex System

Jurel SK, Singh SV*, Aggarwal H, Chand P, Singh RD and Arya D

Department of Prosthodontics, Faculty of Dental Sciences, King George’s Medical University UP, India

*Corresponding author: Saumyendra V. Singh, Department of Prosthodontics, Faculty of Dental Sciences, King George’s Medical University UP, India

Received: February 16, 2017; Accepted: April 11, 2017; Published: April 18, 2017


Preventive prosthodontics emphasizes the importance of any procedure that can delay or eliminate future prosthodontic problems. In the past, when patients presented themselves as candidates for a denture with teeth that were badly broken down with periodontal involvement or without the ability to financially support extensive restorative treatment, such teeth were extracted. Retention of one or more teeth for an overdenture offers the patient a lot of advantages like better stability, proprioception and support among a few. The following report is of such a case, where solely retained mandibular canines were not extracted and were used to support a mandibular bar retained overdenture.

Key Message: Techniques for retention of endodontically treated and filled roots as abutments beneath overdentures have been an important treatment modality to delay bone loss. This case report is an effort to describe how these overdenture abutments can be utilized for support under a complete denture. Clinical indications and technical considerations have been described along with advantages and potential complications.

Keywords: Bar supported overdenture; Preventive prosthodontics; Coping; Attachments


The basic principle in prosthodontics is to retain whatever is remaining as stated by De-van. The inferior functional status of conventional complete dentures is because of their dependence on mucoperiosteal foundation for support and stability, which itself undergoes constant changes. Presently, the field of implantology has seen considerable development to overcome such problems. But at the same time, it is costly and time consuming requiring surgical intervention. In such a situation, tooth supported overdenture is a viable alternative.

The overdenture treatment derives supplementary support and retention from teeth retained under denture base after these teeth have been intentionally reduced to a gingival level. This enhances denture performance as overlaid roots not only transmit more detailed information through the sensory nuclei to the motor centres and muscles [1,2] but also increase chewing power during mastication [3,4]. Overdentures also have a longer life expectancy since root presence renders the foundation less susceptible to timeand stress-related resorption. Moreover, recent advances in precision attachments for overdentures have made overdenture treatment, a considerable clinical success [5].

The bar clip attachment is an excellent method of increasing the retention and stability of an overdenture [6]. It also provides splinting of abutments. But sometimes, non-parallelism of abutment may complicate its design and it requires greater interocclusal space [7]. This case report describes fabrication of bar attachment using a preci-vertix [8] attachment system originally used as an extracoronal attachment in removable partial dentures. The system consists of a prefabricated bar (male part) and clip (female part) attachment.

The clips are made of nylon which is a bit flexible and it gets locked with the bar, which provides excellent retention and stability to the prosthesis.

Case Presentation

A 53-year-old male patient reported to the outpatient department of Prosthodontics with the chief complaint of difficulty in chewing due to missing teeth and desire to improve esthetics. On intraoral examination teeth present were, 33, and 43. The teeth were firm with severe attrition .The upper and lower edentulous span had favorable ridge with firmly attached keratinized mucosa. No significant systemic extra oral or intraoral anomaly was detected. The maxillary and mandibular ridges were well formed, the palatal vault and soft palate were favorably shaped and no pre-prosthetic surgery was required. As the patient was unwilling to undergo surgical intervention and as mandibular canines appeared favorable according to clinical and radiological examination, it was decided to treat the patient with a maxillary complete denture and a mandibular complete overdenture. Further determination of the Vertical Dimension of Occlusion (VDO) was achieved using phonetics, swallowing, patient preference and facial appearance. It was determined that the interocclusal gap was approximately 8 mm (Figure 1).