WO1994008532A1 - Structure de fixation pour dents artificielles - Google Patents

Structure de fixation pour dents artificielles Download PDF

Info

Publication number
WO1994008532A1
WO1994008532A1 PCT/JP1993/001383 JP9301383W WO9408532A1 WO 1994008532 A1 WO1994008532 A1 WO 1994008532A1 JP 9301383 W JP9301383 W JP 9301383W WO 9408532 A1 WO9408532 A1 WO 9408532A1
Authority
WO
WIPO (PCT)
Prior art keywords
implant
alveolar bone
view
denture base
denture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP1993/001383
Other languages
English (en)
Japanese (ja)
Inventor
Hirosi Ooguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daiki Co Ltd
Original Assignee
Daiki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP32916992A external-priority patent/JP2741563B2/ja
Application filed by Daiki Co Ltd filed Critical Daiki Co Ltd
Priority to AU48340/93A priority Critical patent/AU4834093A/en
Publication of WO1994008532A1 publication Critical patent/WO1994008532A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
    • A61C8/0031—Juxtaosseous implants, i.e. implants lying over the outer surface of the jaw bone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
    • A61C8/003—Transmandibular implants

Definitions

  • the present invention relates to a denture fixing structure in dental care
  • dentures have been used as dentures that can be removed after the tooth has come off.
  • a denture base is formed following the gums, an artificial crown is attached to this denture base, and a spring stopper is attached to the denture base.
  • the denture base is placed on the gums, and the clasp is hung over healthy teeth and fixed. In this case, the chewing power is mainly received by the gums.
  • An implant that cannot be removed is an implant.
  • the intraosseous implant is made by drilling a hole 2 in the longitudinal direction with respect to the alveolar bone 1 as shown in Fig. 38 to Fig. 40, implanting the implant 3 in this hole 2, An artificial crown 4 is put on the top.
  • the mastication force is mainly received by the cortical bone at the top of the alveolar bone 1 holding the implant 3.
  • the subperiosteal implant separates the mucous membrane 5 and the periosteum 6 as shown in FIGS. 41 to 44, and places an implant floor 7 or an implant skeleton on the alveolar bone 1 and covers them.
  • the periosteal flap 6 and the mucous membrane 5 are returned and sutured as described above, and the artificial crown 4 is put on the implant floor 7 or the projection 7a of the implant skeleton. In this case, the chewing power is received by the top of the alveolar bone 1.
  • the structure of an intraosseous implant has the following problems.
  • Alveolar bone 1 needs a moderate thickness, and thin bones cannot be drilled.
  • implant 3 receives the force of mastication with thin cortical bone, so implant 3 may sink.
  • an artery 8 passes through the bottom of the bone, and the hole 2 must be made so as not to damage the artery 8, making the operation difficult.
  • the structure of the subperiosteal implant is such that the implant bed 7 placed on the alveolar bone 1 or the implant sgerton is only held down by the mucous membrane 5 and the periosteum 6, so that the implant bed 7 is fixed. There is a problem of insufficient.
  • the present invention has been made in view of the above circumstances, and its purpose is to stabilize the denture base even in the case of full dentures, facilitate implant surgery, and securely fix the denture.
  • the fixation structure for a denture includes an implant embedded in a hole formed in a side surface of an alveolar bone, and a fixing portion provided at an end of the implant and fixing a denture base, an implant floor, and the like.
  • the implant is embedded in the hole formed on the side surface of the alveolar bone, so that the implant is held and fixed by the alveolar bone.
  • FIG. 2 is a side view showing the procedure of the operation.
  • FIG. 3 is a cross-sectional view in a state where holes have been drilled.
  • FIG. 4 is a cross-sectional view in a state where the implant is mounted.
  • FIG. 5 is a cross-sectional view showing a state in which a denture is being worn during transitional measures.
  • FIG. 6 is a front view showing a defect site in the second embodiment.
  • FIG. 7 is a cross-sectional view in a state where the mucous membrane and the periosteum are separated.
  • FIG. 8 is a cross-sectional view in a state where holes have been drilled.
  • FIG. 9 is a cross-sectional view in a state where an implant is mounted.
  • FIG. 10 is a cross-sectional view in a state where an implant bed is mounted.
  • FIG. 11 is a cross-sectional view in a state where the mucous membrane and the periosteum have been returned.
  • FIG. 12 is a cross-sectional view in a state where a denture is mounted.
  • Figures 13 and 14 are front views of the implant bed.
  • FIG. 15 shows an embodiment in which the second embodiment is applied to a dollar bar type.
  • FIG. 16 is a sectional view of the third embodiment.
  • FIG. 17 is a cross-sectional view of the fourth embodiment with a denture mounted.
  • FIG. 18 is a sectional view of the fifth embodiment with a denture mounted.
  • FIG. 19 is a cross-sectional view of the sixth embodiment with a denture mounted.
  • FIG. 20 is a cross-sectional view of the seventh embodiment with a denture mounted.
  • FIG. 21 is a perspective view of a locking member.
  • FIG. 22 is a cross-sectional view of the eighth embodiment with a denture mounted.
  • FIG. 23 is a front view of the implant in the ninth embodiment.
  • FIG. 24 is a cross-sectional view of the ninth embodiment in a state where the shape memory alloy is deformed.
  • FIG. 25 is a sectional view of the implant in the tenth embodiment.
  • FIG. 26 is a cross-sectional view of the tenth embodiment in a state where the spring-like projection is projected into the alveolar bone.
  • FIG. 27 is a cross-sectional view of the eleventh embodiment with a denture mounted.
  • FIG. 28 is a sectional view of the denture removed in the eleventh embodiment.
  • FIG. 29 is a sectional view of the 12th embodiment.
  • FIG. 30 is a cross-sectional view of the denture base in the thirteenth embodiment.
  • FIG. 31 is a cross-sectional view of the denture base in the 14th embodiment.
  • FIG. 32 is a plan view showing an incision line of the gum in the fifteenth embodiment.
  • FIG. 33 is a plan view showing a state in which a groove is formed in the alveolar bone.
  • FIG. 34 is a side view showing a state in which an implant is embedded in the groove of the alveolar bone.
  • FIG. 35 is a side view showing a state in which a hole is formed in the alveolar bone.
  • FIG. 36 is a perspective view of a winged wing plant for preventing settlement.
  • FIG. 37 is a plan view showing a state in which a groove is formed when an implant with wings for preventing settlement is embedded.
  • Fig. 38 and Fig. 39 are diagrams showing the progress of a conventional intraosseous implant.
  • FIG. 40 is a view showing a conventional intraosseous implant.
  • FIG. 41, FIG. 42 and FIG. 43 are diagrams showing the progress of a conventional subperiosteal implant.
  • FIG. 44 is a view showing a conventional subperiosteal implant.
  • FIGS. 1 to 5 a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
  • the same parts as those in the conventional example will be described with the same reference numerals.
  • the alveolar bone 1 of the jaw is composed of hard cortical bone on the surface and soft cancellous bone inside.
  • the outer side of the alveolar bone 1 is covered with mucous membrane 5 and periosteum 6.
  • the artery 8 passes through the bottom surface of the alveolar bone 1.
  • the hole 11 is formed to penetrate the alveolar bone 1 laterally, that is, in the lateral direction, and the implant 12 is embedded in the hole 11.
  • the implant 12 is made of a material having an affinity for the body moth, such as titanium or sapphire, and has a large number of recesses 12a formed on the surface thereof.
  • the denture base 14 is formed from a hard resin following the gum, is placed on the alveolar bone 1 via the mucous membrane 5, and the artificial tooth 15 is attached to the top.
  • the locking portion 17 is locked to the protrusion 13, thereby fixing the denture base 14 to the alveolar bone 1.
  • Case 1 was performed on edentulous patients.
  • Drill a hole in the alveolar bone 1 with a 2.3 thigh diameter First, by using the guiding machine A shown in FIG. 2, the position adjusting section B is adjusted, and the perforation position C on both sides of the alveolar bone 1, that is, the mucous membrane 5 is pierced for marking. Next, a high-speed rotating piercing tool E using a turbine D is advanced from one side to pierce one cortical bone of the alveolar bone 1. Therefore, the drill E is replaced with a low-speed drill, and the soft cancellous bone inside is drilled. When the tip of the low-speed drill reaches the cortical bone, the low-speed drill is extracted from the alveolar bone 1. Again, replace the drilling tool E with the high-speed rotation by the turbine D, advance the drilling tool E from the opposite direction to the marking position C, and drill the other cortical bone. The result is as shown in Fig. 3.
  • a 2.5 inch titanium plant 12 made of titanium is pressed into the hole 11.
  • a gap is formed between the protrusion 13 of the implant 12 and the inner surface of the recess 16 as shown in FIG. 5, and the protrusion 13 does not contact the recess 16.
  • the cancellous bone surrounds the implant 1 2 so as to fill the recess 1 2a, and the implant 1 2 is firmly fixed to the alveolar bone 1. Is done.
  • the concave portion 16 of the denture base 14 is filled with a soft resin to form the locking portion 17.
  • the projection 13 is locked while elastically deforming the locking part 17, and the denture base 14 is fixed to the gum.
  • the pressure for chewing food is shared by the implant 12 through the upper end of the gum, the locking portion 17 and the protrusion 13. Further, when removing the denture base 14, if the denture base 14 is pulled away from the gums, the locking of the projection 13 on the locking portion 17 is released, and the denture base 14 is removed.
  • FIGS. 6 to 14 show a second embodiment of the present invention in which a denture is provided at a site F where teeth have been lost. A description will be given according to the procedure of the operation.
  • the mucous membrane 5 and the periosteum 6 are separated from the alveolar bone 1 at the defect site F.
  • a hole 11 is formed in the alveolar bone 1 as in the first embodiment.
  • implant 21 is pressed into hole 11.
  • C This is implants 2 1, the screw holes 2 2 at both ends is formed as a fixed part
  • the saddle-shaped implant floor 23 is crowned on the alveolar bone 1 and the screw 24 is screwed into the screw hole 22.
  • the impillant floor 23 is alveolar via the implant 21. Fix to bone 1.
  • the plant floor 23 has a shape that maintains blood flow and takes into account pressure resistance, or has a window 23a formed therein (FIG. 14).
  • FIG. 11 the mucous membrane 5 and periosteum 6 are returned and sutured so as to cover the implant bed 23. 6.
  • Fig. 12 artificial teeth 15 are attached to the projecting portions 25 at the upper end of the implant bed 23.
  • a plurality of protrusions 25 are provided on the implant floor 23, a plurality of artificial teeth 15 can be implanted by attaching one implant floor 23.
  • a plurality of artificial teeth 15 can be formed.
  • the denture base 27 can be fixed.
  • Implants 1 2 and 21 are held by the cortical bone on both sides of the alveolar bone 1, so that the resistance to shovels during mastication can be increased, and the implants can be implanted like conventional intraosseous implants. It can prevent sinking.
  • the denture base 14 can be securely fixed even in the case of full dentures, so that food can be sufficiently chewed.
  • the implant bed 23 is fixed to the implant 21 with screws 24, unlike conventional subperiosteal implants, it is firmly fixed and can withstand food chewing sufficiently.
  • FIG. 16 shows a third embodiment of the present invention, in which an implant 21 is press-fitted into a hole 11 and a round head screw is screwed into the screw hole 22 as a fixing portion.
  • the projection 28 is formed.
  • FIG. 17 shows a fourth embodiment of the present invention, in which a blind hole 29 was pierced from one side of the alveolar bone 1, and an implant 30 was pressed into the blind hole 29.
  • the implant 30 has a projection 28 as a fixing portion.
  • FIG. 18 shows a fifth embodiment of the present invention, in which an inclined protruding portion 31 having a low upper portion and a high lower portion is formed as a fixed portion at the end of the implant 12.
  • the protruding locking portion 32 formed on the denture base 14 is locked.
  • FIG. 19 shows a sixth embodiment of the present invention, in which a concave portion 33 as a fixing portion is formed at an end of an implant 21 and a denture base 14 is formed therein.
  • the protruding locking portions 34 are locked.
  • FIGS. 20 and 21 show a seventh embodiment of the present invention, in which a locking member 35 is attached to a denture base 14.
  • the locking member 35 is formed of an elastic member, has a groove 35 a into which the protrusion 13 is introduced, and a locking portion 35 b to which the protrusion 13 is locked at the upper part. It was formed.
  • the projection 13 is engaged with the engagement portion 35b through the groove 35a.
  • FIG. 22 shows an eighth embodiment of the present invention, in which a cylindrical implant 36 is press-fitted into a hole 11, penetrates a denture base 14, and is a screw 3 7 Or a pin 38 having a head 38a is press-fitted.
  • the denture base 14 is securely fixed to the alveolar bone 1.
  • the denture base 14 can be removed by removing the screw 37 or the pin 38 at a desired time such as cleaning the denture base 14.
  • FIGS. 23 and 24 show a ninth embodiment of the present invention, in which the implant 39 is formed of a unidirectional shape memory alloy. At room temperature, the implant 39 has a rod shape with a smooth surface. However, when the implant 39 is inserted into the hole 11 and heated to approximately 40 to 50 degrees Celsius, a large number of protrusions 39 a are formed in the alveolar bone. It will bite into the cancellous bone and secure its fixation.
  • FIGS. 25 and 26 show a tenth embodiment of the present invention, in which a spring-like projection 40 a is housed in an implant 40.
  • the protrusion 40a protrudes and bites into the cancellous bone of the alveolar bone 1 to secure the fixation.
  • FIGS. 27 and 28 show a first embodiment of the present invention, in which a spring 42 formed of a bidirectional shape memory alloy is embedded in a denture base 14.
  • a spring 42 formed of a bidirectional shape memory alloy is embedded in a denture base 14.
  • the temperature of the spring 42 rises due to body temperature, the length of the spring 42 increases, and the locking projection 43 protrudes. If the denture base 14 is removed by locking it into the recess 3 3 of the implant 2 1 and the denture base 14 is removed, the temperature of the spring 4 2 decreases and contracts, so the locking projection 4 3 is stored in the denture base 14. is there.
  • FIG. 29 shows a twelfth embodiment of the present invention, in which a cross groove is formed at the end of the implant 12 to form a resilient fixing portion 44. is there.
  • FIG. 30 shows a thirteenth embodiment of the present invention, in which a guide groove 45 is formed in a denture base 14, and a flexible wire 46 is inserted into the guide groove 45. Things. Flexible wire 46 defines one end When it moves along the surface of the tooth bed 14, the other end protrudes into the denture base 14 and locks into the recess 33 of the implant 21.
  • FIG. 31 shows a fourteenth embodiment of the present invention, in which a cam 47 is provided on a denture base 14 and when the cam 47 is rotated, it is linked to this.
  • the protruding portion 48 engages and disengages from the concave portion 33 of the implant 21.
  • FIGS. 32 to 35 show a fifteenth embodiment of the present invention, which is a modification of the procedure for forming the hole 49, and shows the embodiment from the top of the alveolar bone 1.
  • a groove 49a is formed, and an implant 12 is buried in the bottom, and then the groove 49a above the implant 12 is closed to form a hole 49.
  • the mucosa 5 and periosteum 6 at the corresponding site are incised along the lines 50 and 51, and as shown in FIGS. 33 and 34, the alveolar bone 1 is removed.
  • a groove 49a is formed in the upper part.
  • the implant 12 is embedded in the bottom of the groove 49a, and the protrusion 13 at the end is made to penetrate the mucous membrane 5 and the periosteum 6 and protrude from the alveolar bone 1.
  • the mucous membrane 5 and the periosteum 6 are sutured, the upper part of the implant 12 is filled with the blood clot B. After about 3 months in this state, as shown in Fig.
  • the upper groove 49a is closed so that the alveolar bone 1 surrounds the implant 12 by regeneration of the bone, and the implant is implanted.
  • a hole 49 is formed around 1 2, the implant 1 2 is fixed to the alveolar bone 1, and the projection 13 at the end is fixed, for example, protruding from the alveolar bone 1 as shown in FIG. Is performed.
  • the alveolar bone 1 intersects the groove 49a as shown in FIG. 37.
  • a groove 53 may be provided.
  • the fixation structure for a denture includes: an implant embedded in a hole formed in a side surface portion of an alveolar bone; and a fixing portion provided at an end of the implant for fixing a denture base, an implant floor, and the like. Because of this, it is possible to stabilize the denture base even in the case of full dentures, facilitate the operation of implants, and achieve an excellent effect that the denture can be securely fixed.

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)

Abstract

Une structure de fixation pour dents artificielles comprend un support de prothèse (14) fixé au moyen de parties de fixation (13) d'un implant (12) encastré dans une surface latérale d'un os alvéolaire (1), de façon à éliminer l'instabilité que l'on connaît avec les supports de prothèse fixés dans la gencive. La fonction du support de prothèse est ainsi nettement améliorée.
PCT/JP1993/001383 1992-10-16 1993-09-28 Structure de fixation pour dents artificielles Ceased WO1994008532A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU48340/93A AU4834093A (en) 1992-10-16 1993-09-28 Artificial tooth fixing structure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4/329169 1992-10-16
JP32916992A JP2741563B2 (ja) 1992-10-16 1992-12-09 インプラント及び義歯床

Publications (1)

Publication Number Publication Date
WO1994008532A1 true WO1994008532A1 (fr) 1994-04-28

Family

ID=18218421

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1993/001383 Ceased WO1994008532A1 (fr) 1992-10-16 1993-09-28 Structure de fixation pour dents artificielles

Country Status (2)

Country Link
AU (1) AU4834093A (fr)
WO (1) WO1994008532A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100035207A1 (en) * 2007-02-01 2010-02-11 Lieh-Tang Chen Artificial teethridge and fang
IT201800007892A1 (it) * 2018-08-06 2020-02-06 Antonio Slawitz Kit di ripristino dentale
JP2023520892A (ja) * 2020-04-02 2023-05-22 マイケル ワセフ 水平に位置させるエンドスティール歯科インプラントシステムと方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58195555A (ja) * 1982-04-29 1983-11-14 コア−ベント・コ−ポレ−ション 総義歯の保持、歯冠およびブリツジ支持のための負荷を担う歯科用インプラントシステム
JPS6253647A (ja) * 1985-09-03 1987-03-09 株式会社ニコン 骨膜下インプラント固定用ピン
JPH02243140A (ja) * 1988-10-31 1990-09-27 Ralph C Mays 義歯を口内に取外可能に支持するアタッチメント

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58195555A (ja) * 1982-04-29 1983-11-14 コア−ベント・コ−ポレ−ション 総義歯の保持、歯冠およびブリツジ支持のための負荷を担う歯科用インプラントシステム
JPS6253647A (ja) * 1985-09-03 1987-03-09 株式会社ニコン 骨膜下インプラント固定用ピン
JPH02243140A (ja) * 1988-10-31 1990-09-27 Ralph C Mays 義歯を口内に取外可能に支持するアタッチメント

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100035207A1 (en) * 2007-02-01 2010-02-11 Lieh-Tang Chen Artificial teethridge and fang
IT201800007892A1 (it) * 2018-08-06 2020-02-06 Antonio Slawitz Kit di ripristino dentale
JP2023520892A (ja) * 2020-04-02 2023-05-22 マイケル ワセフ 水平に位置させるエンドスティール歯科インプラントシステムと方法
JP2024111193A (ja) * 2020-04-02 2024-08-16 マイケル ワセフ 水平に位置させるエンドスティール歯科インプラントシステムと方法
EP4640181A3 (fr) * 2020-04-02 2026-04-15 Wassef, Michael Système et procédé d'implant dentaire placé horizontalement en bout de prothèse

Also Published As

Publication number Publication date
AU4834093A (en) 1994-05-09

Similar Documents

Publication Publication Date Title
US5362234A (en) Self-drilling endosteal hollow-basket implant system with shock-absorber
CA1311948C (fr) Implant dentaire a vis
US5984681A (en) Dental implant and method of implanting
US3474537A (en) Dental prosthetic appliance
US4086701A (en) Device for implanting an artificial endosseous element of ceramics and an implant method for use of the same
USRE35784E (en) Submergible screw-type dental implant and method of utilization
US5246370A (en) Dental implant method
US20030186187A1 (en) Positioning device for fitting implant-supported dental prostheses
JPH0244540B2 (fr)
JPS59139249A (ja) 口腔移植補綴用万能ピン、及びこれに用いる器具
KR20130011347A (ko) 절개된 잇몸에 형성된 틈을 확장하는 임플란트용 잇몸 견인장치
JP2001517988A (ja) インプラント体および回転体
US4084318A (en) Stabilized dental implant
TWI578965B (zh) Dental implants
KR100894315B1 (ko) 응급 임플란트용 고정체
KR970706768A (ko) 구강 외의 응용 및 치열 교정용 임플랜트 시스템(implant system for extraoral applications and orthodontics)
US7377781B1 (en) Molar dental implant
JP4125008B2 (ja) 歯科矯正装置
JP2741563B2 (ja) インプラント及び義歯床
WO1994008532A1 (fr) Structure de fixation pour dents artificielles
KR20200053276A (ko) 임플란트 어셈블리 및 이를 이용한 임플란트 방법
KR102024911B1 (ko) 편심형 힐링 어버트먼트
US20220175497A1 (en) Bionic implants
KR200444952Y1 (ko) 임플란트 픽스츄어
EP3838216A1 (fr) Structure de dent artificielle collée à l'os

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU BG BR CA CZ FI HU KR NO NZ PL RO RU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
ENP Entry into the national phase

Ref country code: US

Ref document number: 1995 411807

Date of ref document: 19950410

Kind code of ref document: A

Format of ref document f/p: F

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA