Biomaterial Database

[Frequency of Nd:YAG capsulotomy after implantation of PMMA and silicon intraocular lenses]. 1998

S P Pradella, and R Täumer

Augentagesklinik Frankfurt.

The aim of this investigation was to ascertain the frequency of secondary cataract after implantation of PMMA or Silicone IOLs. METHODS In our series of patients we implanted 900 PMMA IOLs in a period of 4 years. In the following 3 years we implanted 1600 silicone IOLs. After the operation, a Nd:YAG laser capsulotomy was indicated there was a reduction in visual acuity and the patient asked for improvement. With the help of computer documentation we had the possibility to follow up a period of 6 years after PMMA and 3 years after silicone IOL implantation. RESULTS (1) PMMA IOL: After implantation of PMMA IOLs we found a frequency of 22% capsulotomies during the investigation period of 6 years; 4.9% of them occurred during the 1st year and 8% during the 2nd year. (2) Silicone IOL: During the control period of 3 years we found a capsulotomy rate of 9.9%. Most happened in the 1st year. CONCLUSIONS Our 22.9% capsulotomy rate after PMMA IOL implantation is lower than the rate mentioned in the literature. We noticed a peak of capsulotomies in the 2nd year after the operation. During a control period of only 3 years after implantation of silicone IOLs we found a capsulotomy rate of 9.9%.

UI	MeSH Term	Description	Entries
D007910	Lenses, Intraocular	Artificial implanted lenses.	Implantable Contact Lens,Lens, Intraocular,Contact Lens, Implantable,Intraocular Lens,Intraocular Lenses,Lens, Implantable Contact
D008297	Male		Males
D011183	Postoperative Complications	Pathologic processes that affect patients after a surgical procedure. They may or may not be related to the disease for which the surgery was done, and they may or may not be direct results of the surgery.	Complication, Postoperative,Complications, Postoperative,Postoperative Complication
D011474	Prosthesis Design	The plan and delineation of prostheses in general or a specific prosthesis.	Design, Prosthesis,Designs, Prosthesis,Prosthesis Designs
D012086	Reoperation	A repeat operation for the same condition in the same patient due to disease progression or recurrence, or as followup to failed previous surgery.	Revision, Joint,Revision, Surgical,Surgery, Repeat,Surgical Revision,Repeat Surgery,Revision Surgery,Joint Revision,Revision Surgeries,Surgery, Revision
D005260	Female		Females
D005500	Follow-Up Studies	Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.	Followup Studies,Follow Up Studies,Follow-Up Study,Followup Study,Studies, Follow-Up,Studies, Followup,Study, Follow-Up,Study, Followup
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000368	Aged	A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available.	Elderly
D012825	Silicon	A trace element that constitutes about 27.6% of the earth's crust in the form of SILICON DIOXIDE. It does not occur free in nature. Silicon has the atomic symbol Si, atomic number 14, and atomic weight [28.084; 28.086].	Silicon-28,Silicon 28