Literature DB >> 26655015

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

Sunilchandra Tripuraneni1, Sriharsha Babu Vadapalli, Kaleswararao Atluri, Ravikiran Potluri.   

Abstract

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Year:  2015        PMID: 26655015      PMCID: PMC4728991          DOI: 10.4103/0301-4738.171537

Source DB:  PubMed          Journal:  Indian J Ophthalmol        ISSN: 0301-4738            Impact factor:   1.848


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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.[123] 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.[123] 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.[145] 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.

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Conflict of interest

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  5 in total

Review 1.  The ocular impression: A review of the literature and presentation of an alternate technique.

Authors:  M F Mathews; R M Smith; A J Sutton; R Hudson
Journal:  J Prosthodont       Date:  2000-12       Impact factor: 2.752

2.  Modified impression method of artificial eye fitting.

Authors:  L Allen; H E Webster
Journal:  Am J Ophthalmol       Date:  1969-02       Impact factor: 5.258

3.  Surgical considerations in the prosthetic treatment of ocular and orbital defects.

Authors:  G R Parr; B M Goldman; A O Rahn
Journal:  J Prosthet Dent       Date:  1983-03       Impact factor: 3.426

4.  Surgical management of the anophthalmic orbit, part 1: congenital.

Authors:  D Krastinova; M B Kelly; M Mihaylova
Journal:  Plast Reconstr Surg       Date:  2001-09-15       Impact factor: 4.730

5.  An innovative impression technique for fabrication of a custom made ocular prosthesis.

Authors:  Sunil Chandra Tripuraneni; Sriharsha Babu Vadapalli; P Ravikiran; N Nirupama
Journal:  Indian J Ophthalmol       Date:  2015-06       Impact factor: 1.848

  5 in total

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