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   Table of Contents      
LETTER TO THE EDITOR
Year : 2015  |  Volume : 63  |  Issue : 10  |  Page : 808-809

Respond to: An innovative impression technique for fabrication of a custom-made ocular prosthesis


1 Department of Prosthodontics and Maxillofacial Prosthetics, Dr. Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences, Gannavaram, Krishna, Andhra Pradesh, India
2 Pinnamaneni Siddhartha Institute of Medical Sciences, Gannavaram, Krishna, Andhra Pradesh, India

Date of Web Publication10-Dec-2015

Correspondence Address:
Dr. Sunilchandra Tripuraneni
Department of Prosthodontics and Maxillofacial Prosthetics, Dr. Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences, Gannavaram, Krishna, Andhra Pradesh
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0301-4738.171537

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How to cite this article:
Tripuraneni S, Vadapalli SB, Atluri K, Potluri R. Respond to: An innovative impression technique for fabrication of a custom-made ocular prosthesis. Indian J Ophthalmol 2015;63:808-9

How to cite this URL:
Tripuraneni S, Vadapalli SB, Atluri K, Potluri R. Respond to: An innovative impression technique for fabrication of a custom-made ocular prosthesis. Indian J Ophthalmol [serial online] 2015 [cited 2020 Jun 2];63:808-9. Available from: http://www.ijo.in/text.asp?2015/63/10/808/171537

Dear Sir,

Thank you very much for your interest and questions regarding our article. We are very glad to answer your questions. We can consider using custom fabricated tray but not the prefabricated trays as alternative to direct impression technique. The following quires we received during our article review and the explanations by us will clarify your questions.

1. What are the technical difficulties should be mentioned; how to remove the mold which has set if it is without handle or tray?

Response: Handle of the custom tray mainly aids in carrying the impression material and the tray into the defect and to stabilize the tray while molding the impression. [1],[2],[3] The role of the handle while removing the set impression is limited. The set impression was removed from the defect by applying slight oblique outward pressure near inferior palpebral fissure or holding the material flash on the outer surface of the impression with tweezers. [1] Conditions that demands use of special tray with handle are obliterated defect size and shallow palpebral fissures which hold very less amount of impression material if it is injected directly. Prostheses fabricated in these conditions by using the custom tray, and the handle is oversized than the defect. The best treatment option in these scenarios is a surgical correction of the defect to get appropriate palpebral fissure depth for the comfortable prosthesis. [1],[2],[3]

2. How much is the difference in ocular motility attained using this method as compared to stock tray method?

Response: Lack of custom tray and handle in direct impression technique provides complete closure of the eyelids while molding the impression which facilitates accurate recording of palpebral contours of the defect along with tissue surface. This also facilitates accurate recording of ocular musculature effect on prosthesis contours in function without interference. [1],[4],[5] Recording of the palpebral contours of the defect decreases the time required to carve the palpebral surface of the wax pattern when compared with the wax pattern fabricated by impression using the custom tray and handle. The intimate contact between prosthesis and inner surface of the eyelids considerably helps in free movement of the prosthesis coordinated with ocular movements than prosthesis fabricated from the wax pattern with hand carved palpebral surface.

Financial support and sponsorship

Nil.

Conflict of interest

There are no conflicts of interest.

 
  References Top

1.
Tripuraneni SC, Vadapalli SB, Ravikiran P, Nirupama N. An innovative impression technique for fabrication of a custom made ocular prosthesis. Indian J Ophthalmol 2015;63:545-7.  Back to cited text no. 1
[PUBMED]  Medknow Journal  
2.
Mathews MF, Smith RM, Sutton AJ, Hudson R. The ocular impression: A review of the literature and presentation of an alternate technique. J Prosthodont 2000;9:210-6.  Back to cited text no. 2
    
3.
Allen L, Webster HE. Modified impression method of artificial eye fitting. Am J Ophthalmol 1969;67:189-218.  Back to cited text no. 3
[PUBMED]    
4.
Parr GR, Goldman BM, Rahn AO. Surgical considerations in the prosthetic treatment of ocular and orbital defects. J Prosthet Dent 1983;49:379-85.  Back to cited text no. 4
[PUBMED]    
5.
Krastinova D, Kelly MB, Mihaylova M. Surgical management of the anophthalmic orbit, part 1: Congenital. Plast Reconstr Surg 2001;108:817-26.  Back to cited text no. 5
    




 

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